A new maximum power point tracking (MPPT) technique based on the bioinspired metaheuristic algorithm for photovoltaic system (PV system) is proposed, namely tunicate swarm algorithm-based MPPT (TSA-MPPT). The proposed algorithm is implemented on the PV system with five PV modules arranged in series and integrated with DC-DC buck converter. Then, the PV system is tested in a simulation using PowerSim (PSIM) software. TSA-MPPT is tested under varying irradiation conditions both uniform irradiation and non-uniform irradiation. Furthermore, to evaluate the performance, TSA-MPPT is compared with perturb & observe-based MPPT (P&O-MPPT) and particle swarm optimization-based MPPT (PSO-MPPT). The TSA-MPPT has an accuracy of 99% and has a reasonably practical capability compared to the MPPT technique, which already existed before.
MAXIMUM POWER POINT TRACKING BASED PHOTO VOLTAIC SYSTEM FOR SMART GRID INTEGR...IRJET Journal
This document presents a study on implementing Maximum Power Point Tracking (MPPT) algorithms in a photovoltaic (PV) system designed for integration into smart grids using MATLAB. It examines MPPT algorithms like Perturb and Observe, Incremental Conductance, and Fuzzy Logic Control to optimize power extraction from PV panels under varying conditions. The paper models and simulates the PV system in MATLAB/Simulink to analyze its performance and dynamic responses. It also addresses challenges and benefits of integrating the MPPT-based PV system into a smart grid, including bidirectional power flow and responding to grid events. Simulation results demonstrate the effectiveness of the MPPT algorithms and the system's potential to support the grid and enhance power generation efficiency
Modeling of Solar PV system under Partial Shading using Particle Swarm Optimi...IRJET Journal
This document presents a model of a solar photovoltaic system under partial shading conditions. It describes using a particle swarm optimization algorithm to efficiently track the maximum power point from a PV array with a non-linear power-voltage characteristic caused by partial shading. The PV array is modeled and simulated in MATLAB/Simulink to demonstrate multiple local maxima under partial shading. A boost converter interfaced with the PV array uses the PSO algorithm and PI controller to extract the optimal voltage from the solar array. Simulation results show the developed model can produce a higher output voltage under partial shading conditions.
This document summarizes a simulation study comparing the performance of three maximum power point tracking (MPPT) algorithms - incremental conductance, perturb and observe, and fuzzy logic control - for a 100 kW photovoltaic system connected to the electrical grid. The system was simulated in MATLAB/Simulink under varying irradiance conditions. Graphs of solar irradiance, PV voltage, duty cycle, modulation index, DC link voltage, grid voltage, grid current, and output power are presented for each MPPT algorithm to analyze and compare their performance.
This paper presents a maximum power point (MPP) tracking method based on a hybrid combination between the fuzzy logic controller (FLC) and the conventional Perturb-and-Observe (P&O) method. The proposed algorithm utilizes the FLC to initialize P&O algorithm with an initial duty cycle. MATLAB/Simulink models consisting of, the photovoltaic system, boost converter and controllers, are built to evaluate the performance of the proposed algorithm. To accurately illustrate the performance of the proposed algorithm, comparisons with standalone FLC and P&O are carried out. The performance of the proposed algorithm is investigated difficult weather conditions including sudden changes and partial shading. The results showed that the proposed algorithm successfully reaches MPP in all scenarios.
The power supplied by photovoltaic DC–DC converter is affected by two factors, sun irradiance and temperature. Therefore, to improve the performance of the PV system; a mechanism to track the maximum power point (MPP) is required. Conventional maximum power point tracking approaches, such as observation and perturbation technique present some difficulties in identifying the true MPP. Therefore, intelligent systems including fuzzy logic controllers (FLC) are introduced for the maximum power point tracking system (MPPT). In this paper, we present a comparative study of the PV standalone system which is controlled by three techniques. The first one is conventional based on the observation and perturbation technique, the other are intelligent based on fuzzy logic according Mamdani and Takagi-Sugeno models. The investigations show that the fuzzy logic controllers provide the best results and Takagi-Sugeno model presents the lower overshoot value.
IRJET- Maximum Power Point Technique (MPPT) for PV System based on Improv...IRJET Journal
This document presents an improved maximum power point tracking (MPPT) technique for photovoltaic systems based on the perturbation and observation (P&O) method with a proportional-integral (PI) controller. The conventional P&O MPPT algorithm is simple but suffers from power oscillations near the maximum power point and slow tracking of changes. The improved method aims to reduce these issues by adding a PI controller to the P&O algorithm. Simulation results show that the improved method has better MPPT tracking effects and slightly higher efficiency compared to the conventional P&O method by reducing power point ripples under stable and changing environmental conditions.
IRJET - Maximum Power Extraction by Introducing P&O Technique in PV GridIRJET Journal
This document discusses maximum power point tracking techniques for photovoltaic systems. It begins with an introduction to MPPT and its importance for extracting maximum power from solar panels. It then describes the perturb and observe (P&O) algorithm, which is one of the most widely used MPPT techniques. The P&O algorithm periodically perturbs the operating voltage of the PV array and compares the power before and after to track the maximum power point. The document also discusses improved P&O algorithms and other techniques like incremental conductance. It provides comparisons of different MPPT methods and concludes that an adaptive step size in P&O can achieve fast tracking with minimal oscillations near the maximum power point.
This document describes a global maximum power point tracking (MPPT) algorithm for photovoltaic arrays under partial shading conditions. The algorithm uses an improved perturb and observe method to iteratively adjust the voltage input to a boost converter connected to the PV array in order to extract the maximum available power. Simulation and hardware results show the algorithm is able to track the global MPP under various non-uniform insolation patterns, outperforming conventional MPPT methods. The algorithm was tested on a PV array subjected to different insolation levels on each panel, and it successfully delivered the maximum available power to the load in each case with only around 2W of converter losses.
MAXIMUM POWER POINT TRACKING BASED PHOTO VOLTAIC SYSTEM FOR SMART GRID INTEGR...IRJET Journal
This document presents a study on implementing Maximum Power Point Tracking (MPPT) algorithms in a photovoltaic (PV) system designed for integration into smart grids using MATLAB. It examines MPPT algorithms like Perturb and Observe, Incremental Conductance, and Fuzzy Logic Control to optimize power extraction from PV panels under varying conditions. The paper models and simulates the PV system in MATLAB/Simulink to analyze its performance and dynamic responses. It also addresses challenges and benefits of integrating the MPPT-based PV system into a smart grid, including bidirectional power flow and responding to grid events. Simulation results demonstrate the effectiveness of the MPPT algorithms and the system's potential to support the grid and enhance power generation efficiency
Modeling of Solar PV system under Partial Shading using Particle Swarm Optimi...IRJET Journal
This document presents a model of a solar photovoltaic system under partial shading conditions. It describes using a particle swarm optimization algorithm to efficiently track the maximum power point from a PV array with a non-linear power-voltage characteristic caused by partial shading. The PV array is modeled and simulated in MATLAB/Simulink to demonstrate multiple local maxima under partial shading. A boost converter interfaced with the PV array uses the PSO algorithm and PI controller to extract the optimal voltage from the solar array. Simulation results show the developed model can produce a higher output voltage under partial shading conditions.
This document summarizes a simulation study comparing the performance of three maximum power point tracking (MPPT) algorithms - incremental conductance, perturb and observe, and fuzzy logic control - for a 100 kW photovoltaic system connected to the electrical grid. The system was simulated in MATLAB/Simulink under varying irradiance conditions. Graphs of solar irradiance, PV voltage, duty cycle, modulation index, DC link voltage, grid voltage, grid current, and output power are presented for each MPPT algorithm to analyze and compare their performance.
This paper presents a maximum power point (MPP) tracking method based on a hybrid combination between the fuzzy logic controller (FLC) and the conventional Perturb-and-Observe (P&O) method. The proposed algorithm utilizes the FLC to initialize P&O algorithm with an initial duty cycle. MATLAB/Simulink models consisting of, the photovoltaic system, boost converter and controllers, are built to evaluate the performance of the proposed algorithm. To accurately illustrate the performance of the proposed algorithm, comparisons with standalone FLC and P&O are carried out. The performance of the proposed algorithm is investigated difficult weather conditions including sudden changes and partial shading. The results showed that the proposed algorithm successfully reaches MPP in all scenarios.
The power supplied by photovoltaic DC–DC converter is affected by two factors, sun irradiance and temperature. Therefore, to improve the performance of the PV system; a mechanism to track the maximum power point (MPP) is required. Conventional maximum power point tracking approaches, such as observation and perturbation technique present some difficulties in identifying the true MPP. Therefore, intelligent systems including fuzzy logic controllers (FLC) are introduced for the maximum power point tracking system (MPPT). In this paper, we present a comparative study of the PV standalone system which is controlled by three techniques. The first one is conventional based on the observation and perturbation technique, the other are intelligent based on fuzzy logic according Mamdani and Takagi-Sugeno models. The investigations show that the fuzzy logic controllers provide the best results and Takagi-Sugeno model presents the lower overshoot value.
IRJET- Maximum Power Point Technique (MPPT) for PV System based on Improv...IRJET Journal
This document presents an improved maximum power point tracking (MPPT) technique for photovoltaic systems based on the perturbation and observation (P&O) method with a proportional-integral (PI) controller. The conventional P&O MPPT algorithm is simple but suffers from power oscillations near the maximum power point and slow tracking of changes. The improved method aims to reduce these issues by adding a PI controller to the P&O algorithm. Simulation results show that the improved method has better MPPT tracking effects and slightly higher efficiency compared to the conventional P&O method by reducing power point ripples under stable and changing environmental conditions.
IRJET - Maximum Power Extraction by Introducing P&O Technique in PV GridIRJET Journal
This document discusses maximum power point tracking techniques for photovoltaic systems. It begins with an introduction to MPPT and its importance for extracting maximum power from solar panels. It then describes the perturb and observe (P&O) algorithm, which is one of the most widely used MPPT techniques. The P&O algorithm periodically perturbs the operating voltage of the PV array and compares the power before and after to track the maximum power point. The document also discusses improved P&O algorithms and other techniques like incremental conductance. It provides comparisons of different MPPT methods and concludes that an adaptive step size in P&O can achieve fast tracking with minimal oscillations near the maximum power point.
This document describes a global maximum power point tracking (MPPT) algorithm for photovoltaic arrays under partial shading conditions. The algorithm uses an improved perturb and observe method to iteratively adjust the voltage input to a boost converter connected to the PV array in order to extract the maximum available power. Simulation and hardware results show the algorithm is able to track the global MPP under various non-uniform insolation patterns, outperforming conventional MPPT methods. The algorithm was tested on a PV array subjected to different insolation levels on each panel, and it successfully delivered the maximum available power to the load in each case with only around 2W of converter losses.
A SIMSCAPE based design of a dual maximum power point tracker of a stand-alon...IJECEIAES
This document presents a SIMSCAPE simulation of a dual maximum power point tracker (dual-MPPT) for a solar photovoltaic module to operate at the global maximum power point (GMPP) under partial shading conditions. A dual-MPPT system is more efficient than a single-MPPT system and is less sensitive to partial shading. The document describes modeling a PV module using SIMSCAPE blocks and simulating single and dual-MPPT systems. The results show the dual-MPPT system extracts more power than the single-MPPT system under partial shading, demonstrating dual-MPPT's higher efficiency.
This document proposes a particle swarm optimization (PSO) algorithm for maximum power point tracking (MPPT) in solar photovoltaic systems that can operate under partial shading conditions. It begins by reviewing existing MPPT methods and their limitations in partial shading scenarios. It then models the photovoltaic system and designs a boost converter for interfacing solar panels with the grid. The proposed PSO-based MPPT algorithm modifies the standard PSO to track the global maximum power point under non-uniform irradiance. Simulation results show the algorithm can reach the maximum power point in fewer iterations compared to other methods.
Improved strategy of an MPPT based on the sliding mode control for a PV system IJECEIAES
The energy produced using a photovoltaic (PV) is mainly dependent on weather factors such as temperature and solar radiation. Given the high cost and low yield of a PV system, it must operate at maximum power point (MPP), which varies according to changes in load and weather conditions. This contribution presents an improved maximum power point tracking (MPPT) controllers of a PV system in various climatic conditions. The first is a sliding mode MPPT that designed to be applied to a buck converter in order to achieve an optimal PV array output voltage. The second MPPT is based on the incremental conductance algorithm or Perturb-and-Observe algorithm. It provides the output reference PV voltage to the sliding mode controller acting on the duty cycle of the DC-DC converter. Simulation is carried out in SimPower toolbox of Matlab/Simulink. Simulation results confirm the effectiveness of the sliding mode control MPPT under the parameter variation environments and shown that the controllers meet its objectives.
IRJET- A Fast Converging MPPT Control Technique (GWO) for PV Systems Adaptive...IRJET Journal
This document presents a new maximum power point tracking (MPPT) technique called gray wolf optimization (GWO) for photovoltaic systems that can track the global peak power point faster under changing irradiation and partial shading conditions. The GWO algorithm is implemented in MATLAB and experimentally tested. Both the simulation and experimental results show that the proposed GWO MPPT technique has faster tracking speeds and higher efficiencies compared to traditional Perturbation and Observation (P&O) and Particle Swarm Optimization (PSO) MPPT methods.
Integral sliding-mode controller for maximum power point tracking in the grid...IJECEIAES
The output power generated in the photovoltaic modules depends both on the solar radiation and the temperature of the solar cells. To maximize the efficiency of the system, it is required to monitor the maximum power point of the photovoltaic system. For this purpose, monitoring the maximum power point (MPPT) of photovoltaic systems should be as quick and accurately as possible for increasing energy production, which ultimately increases the cost-efficiency of the photovoltaic system. This paper proposes a new approach for MPPT) using the concept of the integral sliding mode controller (ISMC) to ensure fast and precise monitoring of the peak power. The performance of the ISMC is significantly influenced by the choice of the sliding surface. To assess the reliability ISMC control, the results have been compared with those of a PI controller. The results obtained are used to evaluate the performance of the ISMC strategy under different climatic conditions. Finally, the effectiveness of the proposed solution is confirmed using simulations in PSIM tools and experimental results were used to evaluate the effectiveness of the proposed approach.
Modeling and Simulation of Solar System with MPPT Based Inverter and Grid Syn...IRJET Journal
This document summarizes a research paper that models and simulates a solar power system with maximum power point tracking (MPPT) and grid synchronization. The proposed system includes a DC-DC boost converter, an MPPT controller using a fuzzy logic algorithm, an inverter that uses sinusoidal pulse width modulation (SPWM), and grid synchronization. Simulation results show that the system is able to efficiently maximize solar panel output power and synchronize with the grid without disturbances. The MPPT fuzzy logic algorithm and grid synchronization techniques allow the proposed system to reliably generate and inject power into the grid for residential and commercial applications.
Maximum power point tracking based on improved spotted hyena optimizer for s...IJECEIAES
The conventional maximum power point tracking (MPPT) method such as perturb and observe (P&O) under partial shading conditions with non-uniform irradiation, can get trapped on local maximum power point (LMPP) and cannot reach global maximum power point (GMPP). This study proposes a bio-inspired metaheuristic algorithm spotted hyena optimizer (SHO) and improved SHO as a new MPPT technique. The proposed SHO-MPPT and improved SHO-MPPT are used to extract GMPP from solar photovoltaic (PV) arrays operated under uniform irradiation and non-uniform irradiation. Simulation with Powersim (PSIM) and experimental with the emulated PV source were presented. Furthermore, to evaluate the performance of the proposed algorithm, SHO-MPPT is compared with P&O-MPPT and particle swarm optimization (PSO)-MPPT. The SHO-MPPT has an accuracy of 99% and has the good capability, but there are power fluctuations before reaching MPP. Therefore, improved SHO-MPPT was developed to get better results. The improved SHO-MPPT proved high accuracy of 99% and faster than SHO-MPPT and PSO-MPPT in tracking the maximum power point (MPP). Furthermore, there are minor power fluctuations.
IRJET- Maximum Power Point Tracking of PV System by Particle Swarm Optimi...IRJET Journal
This document presents research on using a particle swarm optimization (PSO) algorithm to track the maximum power point of a photovoltaic (PV) system. PSO is used to optimize the output power of a PV module by defining an objective function that represents power with constraints. A DC-DC boost converter is used in the PV system for maximum power point tracking. Simulation results show that PSO can effectively track the global maximum power point under varying conditions and the boost converter is able to boost the output voltage and deliver regulated power. The research demonstrates that PSO and a boost converter can maximize efficiency and power generation from a PV system.
Nonlinear Current Controller for a Single Phase Grid Connected Photovoltaic S...IRJET Journal
This document presents a nonlinear current control method for a single-phase grid-connected photovoltaic (PV) system. Partial feedback linearization is used to design the controller, which linearizes the system partially and enables controller design. The controller regulates the inverter switches to track the reference current from the maximum power point tracking system. Simulation results show the proposed controller performs well under changing conditions like atmospheric changes and faults, regulating the grid current better than hysteresis control. Experimental validation of the control scheme is also presented.
IRJET- High Accurate Sensorless Dual Axis Solar Tracking System Controlle...IRJET Journal
1. The document describes a high accurate sensorless dual axis solar tracking system controlled by a maximum power point tracker (MPPT) for microgrid applications.
2. An MPPT uses an algorithm like perturb and observe to adjust the operating point of a photovoltaic system to maximize power extraction from the solar panels despite changing temperature and irradiance conditions.
3. The proposed system uses a boost converter controlled by an MPPT to boost the voltage from the PV panels, and a dual axis solar tracker to optimize the panel orientation for maximum sunlight exposure.
An Improved Constant Voltage Based MPPT Technique for PMDC MotorIAES-IJPEDS
This document presents an improved constant voltage based maximum power point tracking (MPPT) technique for a permanent magnet DC motor (PMDC) driven by a standalone photovoltaic (SAPV) system. The technique uses a pilot PV panel to measure the open circuit voltage of the main PV panel in order to track the MPP without disconnecting the panel from the load. A proportional-integrator controller is used to adjust the duty cycle of a DC-DC converter such that the PV voltage matches the MPP voltage. Simulation results show that the array efficiency increases under varying temperature and solar insolation conditions when using the improved MPPT technique compared to directly coupling the PV panel to the motor load.
IRJET - MPPT based Photovoltaic System with Zeta Converter for DC LoadIRJET Journal
This document presents a proposed photovoltaic system with MPPT and a Zeta converter to improve efficiency. The system aims to maximize solar panel power output using an MPPT technique and regulate the output voltage with a Zeta converter. The Zeta converter is chosen because it maintains the same polarity for both voltage and current compared to other converters. The proposed system is simulated in MATLAB Simulink and results show that it reduces voltage and current ripple at the output compared to an open loop system without MPPT or converter regulation. The system improves efficiency by tracking maximum power from the solar panels and maintaining a regulated output voltage with low losses.
This document analyzes a unified output MPPT control strategy for a subpanel PV converter system (SPMC) to address real-world mismatch issues in photovoltaic systems. The SPMC system connects a dedicated MPPT converter to each PV cell string in a panel. This allows each string to operate at its individual maximum power point regardless of mismatch conditions. However, implementing independent MPPT control for each string increases costs. Therefore, the document proposes a unified output MPPT control structure that reduces costs by saving on analog-to-digital units, current sensors, and MPPT controllers while still allowing each SPMC to operate at its optimal maximum power point. Simulation and experimental results confirm the effectiveness of this unified output control approach.
This document presents a sliding mode control based maximum power point tracking (MPPT) method for solar PV systems. It discusses modeling of the PV system using a single diode model and the components of the system including the PV array, DC-DC boost converter, and sliding mode controller (SMC). The SMC algorithm tracks the maximum power point by adjusting the duty cycle of the boost converter based on a switching function defined as the slope of the PV characteristics. Simulation results in MATLAB/Simulink demonstrate the effectiveness of the SMC MPPT approach under varying irradiance conditions.
MPPT control of PV array based on PSO and adaptive controllerTELKOMNIKA JOURNAL
In general, Photovoltaic (PV) array is not able to generate maximum power automatically, because some partial shading caused by trees, clouds, or buildings. Irradiation imperfections received by the PV array are overcome by applying maximum power point tracking (MPPT) to the output of the PV array. In order to overcome these partial shading problems, this system is employing particle swarm optimization (PSO) as MPPT method. It optimizes the output power of the solar PV array by Zeta converter. Output voltage of MPPT has high rate such that it needs stepdown device to regulate certain voltage. Constant voltage will be the input voltage of buck converter and controlled using adaptive PID. Adaptive control based on model reference adaptive control (MRAC) has design that almost same as the conventional PID structure and it has better performance in several conditions. The proposed system is expected to have stable output and able to perfectly emulate the response of the reference model. From the simulation results, it appears that PSO have high tracking accuracy and high tracking speed to reach maximum power of PV array. In the output voltage regulation, adaptive control does not have a stable error status and consistently follows the set point value.
Modeling and Simulation of Fuzzy Logic based Maximum Power Point Tracking (MP...IJECEIAES
This paper presents modeling and simulation of maximum power point tracking (MPPT) used in solar PV power systems. The Fuzzy logic algorithm is used to minimize the error between the actual power and the estimated maximum power. The simulation model was developed and tested to investigate the effectiveness of the proposed MPPT controller. MATLAB Simulink was employed for simulation studies. The proposed system was simulated and tested successfully on a photovoltaic solar panel model. The Fuzzy logic algorithm succesfully tracking the MPPs and performs precise control under rapidly changing atmospheric conditions. Simulation results indicate the feasibility and improved functionality of the system.
This project proposes a simplified PV module simulator with MPPT. The PV model is designed in Matlab/Simulink based on various mathematical equations. This paper explains the use of MPPT technique in a photovoltaic system. The MPPT is implemented by incremental conductance or perturbation and observation methods. The overall system is designed, developed and validated by using MATLAB/SIMULINK
The document proposes a novel maximum power point tracking (MPPT) algorithm for photovoltaic (PV) systems that has fast convergence speed, zero oscillation around the MPP under steady state conditions, and high tracking speed during rapid irradiance changes. The algorithm compares the measured PV panel voltage to a defined MPP voltage range, and directly controls the duty cycle of the boost converter connecting the PV panel to the load to maintain the operating point at the MPP. Simulation results show the proposed algorithm more accurately tracks the MPP with no oscillations compared to perturb and observe, incremental conductance, and fuzzy logic MPPT methods under changing irradiance conditions.
IRJET- Various MPPT Techniques for Solar PV SystemIRJET Journal
This document discusses various maximum power point tracking (MPPT) techniques used in solar photovoltaic (PV) systems. It describes the need for MPPT controllers to extract maximum available power from PV arrays and compares different MPPT algorithms, including Perturb and Observe (P&O), Incremental Conductance (INC), Artificial Neural Network (ANN), and Fuzzy Logic Controller. For each technique, the document outlines the basic principles, methodology, advantages, and limitations. It concludes that MPPT is crucial for improving PV system efficiency and that the appropriate choice of MPPT method depends on the specific PV system application.
Fuzzy Sliding Mode Control for Photovoltaic SystemIJPEDS-IAES
In this study, a fuzzy sliding mode control (FSMC) based maximum power point tracking strategy has been applied for photovoltaic (PV) system. The key idea of the proposed technique is to combine the performances of the fuzzy logic and the sliding mode control in order to improve the generated power for a given set of climatic conditions. Different from traditional sliding mode control, the developed FSMC integrates two parts. The first part uses a fuzzy logic controller with two inputs and 25 rules as an equivalent controller while the second part is designed for an online adjusting of the switching controller’s gain using a fuzzy tuner with one input and one output. Simulation results showed the effectiveness of the proposed approach achieving maximum power point. The fuzzy sliding mode (FSM) controller takes less time to track the maximum power point, reduced the oscillation around the operating point and also removed the chattering phenomena that could lead to decrease the efficiency of the photovoltaic system.
Redefining brain tumor segmentation: a cutting-edge convolutional neural netw...IJECEIAES
Medical image analysis has witnessed significant advancements with deep learning techniques. In the domain of brain tumor segmentation, the ability to
precisely delineate tumor boundaries from magnetic resonance imaging (MRI)
scans holds profound implications for diagnosis. This study presents an ensemble convolutional neural network (CNN) with transfer learning, integrating
the state-of-the-art Deeplabv3+ architecture with the ResNet18 backbone. The
model is rigorously trained and evaluated, exhibiting remarkable performance
metrics, including an impressive global accuracy of 99.286%, a high-class accuracy of 82.191%, a mean intersection over union (IoU) of 79.900%, a weighted
IoU of 98.620%, and a Boundary F1 (BF) score of 83.303%. Notably, a detailed comparative analysis with existing methods showcases the superiority of
our proposed model. These findings underscore the model’s competence in precise brain tumor localization, underscoring its potential to revolutionize medical
image analysis and enhance healthcare outcomes. This research paves the way
for future exploration and optimization of advanced CNN models in medical
imaging, emphasizing addressing false positives and resource efficiency.
Embedded machine learning-based road conditions and driving behavior monitoringIJECEIAES
Car accident rates have increased in recent years, resulting in losses in human lives, properties, and other financial costs. An embedded machine learning-based system is developed to address this critical issue. The system can monitor road conditions, detect driving patterns, and identify aggressive driving behaviors. The system is based on neural networks trained on a comprehensive dataset of driving events, driving styles, and road conditions. The system effectively detects potential risks and helps mitigate the frequency and impact of accidents. The primary goal is to ensure the safety of drivers and vehicles. Collecting data involved gathering information on three key road events: normal street and normal drive, speed bumps, circular yellow speed bumps, and three aggressive driving actions: sudden start, sudden stop, and sudden entry. The gathered data is processed and analyzed using a machine learning system designed for limited power and memory devices. The developed system resulted in 91.9% accuracy, 93.6% precision, and 92% recall. The achieved inference time on an Arduino Nano 33 BLE Sense with a 32-bit CPU running at 64 MHz is 34 ms and requires 2.6 kB peak RAM and 139.9 kB program flash memory, making it suitable for resource-constrained embedded systems.
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This document presents a SIMSCAPE simulation of a dual maximum power point tracker (dual-MPPT) for a solar photovoltaic module to operate at the global maximum power point (GMPP) under partial shading conditions. A dual-MPPT system is more efficient than a single-MPPT system and is less sensitive to partial shading. The document describes modeling a PV module using SIMSCAPE blocks and simulating single and dual-MPPT systems. The results show the dual-MPPT system extracts more power than the single-MPPT system under partial shading, demonstrating dual-MPPT's higher efficiency.
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The energy produced using a photovoltaic (PV) is mainly dependent on weather factors such as temperature and solar radiation. Given the high cost and low yield of a PV system, it must operate at maximum power point (MPP), which varies according to changes in load and weather conditions. This contribution presents an improved maximum power point tracking (MPPT) controllers of a PV system in various climatic conditions. The first is a sliding mode MPPT that designed to be applied to a buck converter in order to achieve an optimal PV array output voltage. The second MPPT is based on the incremental conductance algorithm or Perturb-and-Observe algorithm. It provides the output reference PV voltage to the sliding mode controller acting on the duty cycle of the DC-DC converter. Simulation is carried out in SimPower toolbox of Matlab/Simulink. Simulation results confirm the effectiveness of the sliding mode control MPPT under the parameter variation environments and shown that the controllers meet its objectives.
IRJET- A Fast Converging MPPT Control Technique (GWO) for PV Systems Adaptive...IRJET Journal
This document presents a new maximum power point tracking (MPPT) technique called gray wolf optimization (GWO) for photovoltaic systems that can track the global peak power point faster under changing irradiation and partial shading conditions. The GWO algorithm is implemented in MATLAB and experimentally tested. Both the simulation and experimental results show that the proposed GWO MPPT technique has faster tracking speeds and higher efficiencies compared to traditional Perturbation and Observation (P&O) and Particle Swarm Optimization (PSO) MPPT methods.
Integral sliding-mode controller for maximum power point tracking in the grid...IJECEIAES
The output power generated in the photovoltaic modules depends both on the solar radiation and the temperature of the solar cells. To maximize the efficiency of the system, it is required to monitor the maximum power point of the photovoltaic system. For this purpose, monitoring the maximum power point (MPPT) of photovoltaic systems should be as quick and accurately as possible for increasing energy production, which ultimately increases the cost-efficiency of the photovoltaic system. This paper proposes a new approach for MPPT) using the concept of the integral sliding mode controller (ISMC) to ensure fast and precise monitoring of the peak power. The performance of the ISMC is significantly influenced by the choice of the sliding surface. To assess the reliability ISMC control, the results have been compared with those of a PI controller. The results obtained are used to evaluate the performance of the ISMC strategy under different climatic conditions. Finally, the effectiveness of the proposed solution is confirmed using simulations in PSIM tools and experimental results were used to evaluate the effectiveness of the proposed approach.
Modeling and Simulation of Solar System with MPPT Based Inverter and Grid Syn...IRJET Journal
This document summarizes a research paper that models and simulates a solar power system with maximum power point tracking (MPPT) and grid synchronization. The proposed system includes a DC-DC boost converter, an MPPT controller using a fuzzy logic algorithm, an inverter that uses sinusoidal pulse width modulation (SPWM), and grid synchronization. Simulation results show that the system is able to efficiently maximize solar panel output power and synchronize with the grid without disturbances. The MPPT fuzzy logic algorithm and grid synchronization techniques allow the proposed system to reliably generate and inject power into the grid for residential and commercial applications.
Maximum power point tracking based on improved spotted hyena optimizer for s...IJECEIAES
The conventional maximum power point tracking (MPPT) method such as perturb and observe (P&O) under partial shading conditions with non-uniform irradiation, can get trapped on local maximum power point (LMPP) and cannot reach global maximum power point (GMPP). This study proposes a bio-inspired metaheuristic algorithm spotted hyena optimizer (SHO) and improved SHO as a new MPPT technique. The proposed SHO-MPPT and improved SHO-MPPT are used to extract GMPP from solar photovoltaic (PV) arrays operated under uniform irradiation and non-uniform irradiation. Simulation with Powersim (PSIM) and experimental with the emulated PV source were presented. Furthermore, to evaluate the performance of the proposed algorithm, SHO-MPPT is compared with P&O-MPPT and particle swarm optimization (PSO)-MPPT. The SHO-MPPT has an accuracy of 99% and has the good capability, but there are power fluctuations before reaching MPP. Therefore, improved SHO-MPPT was developed to get better results. The improved SHO-MPPT proved high accuracy of 99% and faster than SHO-MPPT and PSO-MPPT in tracking the maximum power point (MPP). Furthermore, there are minor power fluctuations.
IRJET- Maximum Power Point Tracking of PV System by Particle Swarm Optimi...IRJET Journal
This document presents research on using a particle swarm optimization (PSO) algorithm to track the maximum power point of a photovoltaic (PV) system. PSO is used to optimize the output power of a PV module by defining an objective function that represents power with constraints. A DC-DC boost converter is used in the PV system for maximum power point tracking. Simulation results show that PSO can effectively track the global maximum power point under varying conditions and the boost converter is able to boost the output voltage and deliver regulated power. The research demonstrates that PSO and a boost converter can maximize efficiency and power generation from a PV system.
Nonlinear Current Controller for a Single Phase Grid Connected Photovoltaic S...IRJET Journal
This document presents a nonlinear current control method for a single-phase grid-connected photovoltaic (PV) system. Partial feedback linearization is used to design the controller, which linearizes the system partially and enables controller design. The controller regulates the inverter switches to track the reference current from the maximum power point tracking system. Simulation results show the proposed controller performs well under changing conditions like atmospheric changes and faults, regulating the grid current better than hysteresis control. Experimental validation of the control scheme is also presented.
IRJET- High Accurate Sensorless Dual Axis Solar Tracking System Controlle...IRJET Journal
1. The document describes a high accurate sensorless dual axis solar tracking system controlled by a maximum power point tracker (MPPT) for microgrid applications.
2. An MPPT uses an algorithm like perturb and observe to adjust the operating point of a photovoltaic system to maximize power extraction from the solar panels despite changing temperature and irradiance conditions.
3. The proposed system uses a boost converter controlled by an MPPT to boost the voltage from the PV panels, and a dual axis solar tracker to optimize the panel orientation for maximum sunlight exposure.
An Improved Constant Voltage Based MPPT Technique for PMDC MotorIAES-IJPEDS
This document presents an improved constant voltage based maximum power point tracking (MPPT) technique for a permanent magnet DC motor (PMDC) driven by a standalone photovoltaic (SAPV) system. The technique uses a pilot PV panel to measure the open circuit voltage of the main PV panel in order to track the MPP without disconnecting the panel from the load. A proportional-integrator controller is used to adjust the duty cycle of a DC-DC converter such that the PV voltage matches the MPP voltage. Simulation results show that the array efficiency increases under varying temperature and solar insolation conditions when using the improved MPPT technique compared to directly coupling the PV panel to the motor load.
IRJET - MPPT based Photovoltaic System with Zeta Converter for DC LoadIRJET Journal
This document presents a proposed photovoltaic system with MPPT and a Zeta converter to improve efficiency. The system aims to maximize solar panel power output using an MPPT technique and regulate the output voltage with a Zeta converter. The Zeta converter is chosen because it maintains the same polarity for both voltage and current compared to other converters. The proposed system is simulated in MATLAB Simulink and results show that it reduces voltage and current ripple at the output compared to an open loop system without MPPT or converter regulation. The system improves efficiency by tracking maximum power from the solar panels and maintaining a regulated output voltage with low losses.
This document analyzes a unified output MPPT control strategy for a subpanel PV converter system (SPMC) to address real-world mismatch issues in photovoltaic systems. The SPMC system connects a dedicated MPPT converter to each PV cell string in a panel. This allows each string to operate at its individual maximum power point regardless of mismatch conditions. However, implementing independent MPPT control for each string increases costs. Therefore, the document proposes a unified output MPPT control structure that reduces costs by saving on analog-to-digital units, current sensors, and MPPT controllers while still allowing each SPMC to operate at its optimal maximum power point. Simulation and experimental results confirm the effectiveness of this unified output control approach.
This document presents a sliding mode control based maximum power point tracking (MPPT) method for solar PV systems. It discusses modeling of the PV system using a single diode model and the components of the system including the PV array, DC-DC boost converter, and sliding mode controller (SMC). The SMC algorithm tracks the maximum power point by adjusting the duty cycle of the boost converter based on a switching function defined as the slope of the PV characteristics. Simulation results in MATLAB/Simulink demonstrate the effectiveness of the SMC MPPT approach under varying irradiance conditions.
MPPT control of PV array based on PSO and adaptive controllerTELKOMNIKA JOURNAL
In general, Photovoltaic (PV) array is not able to generate maximum power automatically, because some partial shading caused by trees, clouds, or buildings. Irradiation imperfections received by the PV array are overcome by applying maximum power point tracking (MPPT) to the output of the PV array. In order to overcome these partial shading problems, this system is employing particle swarm optimization (PSO) as MPPT method. It optimizes the output power of the solar PV array by Zeta converter. Output voltage of MPPT has high rate such that it needs stepdown device to regulate certain voltage. Constant voltage will be the input voltage of buck converter and controlled using adaptive PID. Adaptive control based on model reference adaptive control (MRAC) has design that almost same as the conventional PID structure and it has better performance in several conditions. The proposed system is expected to have stable output and able to perfectly emulate the response of the reference model. From the simulation results, it appears that PSO have high tracking accuracy and high tracking speed to reach maximum power of PV array. In the output voltage regulation, adaptive control does not have a stable error status and consistently follows the set point value.
Modeling and Simulation of Fuzzy Logic based Maximum Power Point Tracking (MP...IJECEIAES
This paper presents modeling and simulation of maximum power point tracking (MPPT) used in solar PV power systems. The Fuzzy logic algorithm is used to minimize the error between the actual power and the estimated maximum power. The simulation model was developed and tested to investigate the effectiveness of the proposed MPPT controller. MATLAB Simulink was employed for simulation studies. The proposed system was simulated and tested successfully on a photovoltaic solar panel model. The Fuzzy logic algorithm succesfully tracking the MPPs and performs precise control under rapidly changing atmospheric conditions. Simulation results indicate the feasibility and improved functionality of the system.
This project proposes a simplified PV module simulator with MPPT. The PV model is designed in Matlab/Simulink based on various mathematical equations. This paper explains the use of MPPT technique in a photovoltaic system. The MPPT is implemented by incremental conductance or perturbation and observation methods. The overall system is designed, developed and validated by using MATLAB/SIMULINK
The document proposes a novel maximum power point tracking (MPPT) algorithm for photovoltaic (PV) systems that has fast convergence speed, zero oscillation around the MPP under steady state conditions, and high tracking speed during rapid irradiance changes. The algorithm compares the measured PV panel voltage to a defined MPP voltage range, and directly controls the duty cycle of the boost converter connecting the PV panel to the load to maintain the operating point at the MPP. Simulation results show the proposed algorithm more accurately tracks the MPP with no oscillations compared to perturb and observe, incremental conductance, and fuzzy logic MPPT methods under changing irradiance conditions.
IRJET- Various MPPT Techniques for Solar PV SystemIRJET Journal
This document discusses various maximum power point tracking (MPPT) techniques used in solar photovoltaic (PV) systems. It describes the need for MPPT controllers to extract maximum available power from PV arrays and compares different MPPT algorithms, including Perturb and Observe (P&O), Incremental Conductance (INC), Artificial Neural Network (ANN), and Fuzzy Logic Controller. For each technique, the document outlines the basic principles, methodology, advantages, and limitations. It concludes that MPPT is crucial for improving PV system efficiency and that the appropriate choice of MPPT method depends on the specific PV system application.
Fuzzy Sliding Mode Control for Photovoltaic SystemIJPEDS-IAES
In this study, a fuzzy sliding mode control (FSMC) based maximum power point tracking strategy has been applied for photovoltaic (PV) system. The key idea of the proposed technique is to combine the performances of the fuzzy logic and the sliding mode control in order to improve the generated power for a given set of climatic conditions. Different from traditional sliding mode control, the developed FSMC integrates two parts. The first part uses a fuzzy logic controller with two inputs and 25 rules as an equivalent controller while the second part is designed for an online adjusting of the switching controller’s gain using a fuzzy tuner with one input and one output. Simulation results showed the effectiveness of the proposed approach achieving maximum power point. The fuzzy sliding mode (FSM) controller takes less time to track the maximum power point, reduced the oscillation around the operating point and also removed the chattering phenomena that could lead to decrease the efficiency of the photovoltaic system.
Similar to Tunicate swarm algorithm based maximum power point tracking for photovoltaic system under non-uniform irradiation (20)
Redefining brain tumor segmentation: a cutting-edge convolutional neural netw...IJECEIAES
Medical image analysis has witnessed significant advancements with deep learning techniques. In the domain of brain tumor segmentation, the ability to
precisely delineate tumor boundaries from magnetic resonance imaging (MRI)
scans holds profound implications for diagnosis. This study presents an ensemble convolutional neural network (CNN) with transfer learning, integrating
the state-of-the-art Deeplabv3+ architecture with the ResNet18 backbone. The
model is rigorously trained and evaluated, exhibiting remarkable performance
metrics, including an impressive global accuracy of 99.286%, a high-class accuracy of 82.191%, a mean intersection over union (IoU) of 79.900%, a weighted
IoU of 98.620%, and a Boundary F1 (BF) score of 83.303%. Notably, a detailed comparative analysis with existing methods showcases the superiority of
our proposed model. These findings underscore the model’s competence in precise brain tumor localization, underscoring its potential to revolutionize medical
image analysis and enhance healthcare outcomes. This research paves the way
for future exploration and optimization of advanced CNN models in medical
imaging, emphasizing addressing false positives and resource efficiency.
Embedded machine learning-based road conditions and driving behavior monitoringIJECEIAES
Car accident rates have increased in recent years, resulting in losses in human lives, properties, and other financial costs. An embedded machine learning-based system is developed to address this critical issue. The system can monitor road conditions, detect driving patterns, and identify aggressive driving behaviors. The system is based on neural networks trained on a comprehensive dataset of driving events, driving styles, and road conditions. The system effectively detects potential risks and helps mitigate the frequency and impact of accidents. The primary goal is to ensure the safety of drivers and vehicles. Collecting data involved gathering information on three key road events: normal street and normal drive, speed bumps, circular yellow speed bumps, and three aggressive driving actions: sudden start, sudden stop, and sudden entry. The gathered data is processed and analyzed using a machine learning system designed for limited power and memory devices. The developed system resulted in 91.9% accuracy, 93.6% precision, and 92% recall. The achieved inference time on an Arduino Nano 33 BLE Sense with a 32-bit CPU running at 64 MHz is 34 ms and requires 2.6 kB peak RAM and 139.9 kB program flash memory, making it suitable for resource-constrained embedded systems.
Advanced control scheme of doubly fed induction generator for wind turbine us...IJECEIAES
This paper describes a speed control device for generating electrical energy on an electricity network based on the doubly fed induction generator (DFIG) used for wind power conversion systems. At first, a double-fed induction generator model was constructed. A control law is formulated to govern the flow of energy between the stator of a DFIG and the energy network using three types of controllers: proportional integral (PI), sliding mode controller (SMC) and second order sliding mode controller (SOSMC). Their different results in terms of power reference tracking, reaction to unexpected speed fluctuations, sensitivity to perturbations, and resilience against machine parameter alterations are compared. MATLAB/Simulink was used to conduct the simulations for the preceding study. Multiple simulations have shown very satisfying results, and the investigations demonstrate the efficacy and power-enhancing capabilities of the suggested control system.
Neural network optimizer of proportional-integral-differential controller par...IJECEIAES
Wide application of proportional-integral-differential (PID)-regulator in industry requires constant improvement of methods of its parameters adjustment. The paper deals with the issues of optimization of PID-regulator parameters with the use of neural network technology methods. A methodology for choosing the architecture (structure) of neural network optimizer is proposed, which consists in determining the number of layers, the number of neurons in each layer, as well as the form and type of activation function. Algorithms of neural network training based on the application of the method of minimizing the mismatch between the regulated value and the target value are developed. The method of back propagation of gradients is proposed to select the optimal training rate of neurons of the neural network. The neural network optimizer, which is a superstructure of the linear PID controller, allows increasing the regulation accuracy from 0.23 to 0.09, thus reducing the power consumption from 65% to 53%. The results of the conducted experiments allow us to conclude that the created neural superstructure may well become a prototype of an automatic voltage regulator (AVR)-type industrial controller for tuning the parameters of the PID controller.
An improved modulation technique suitable for a three level flying capacitor ...IJECEIAES
This research paper introduces an innovative modulation technique for controlling a 3-level flying capacitor multilevel inverter (FCMLI), aiming to streamline the modulation process in contrast to conventional methods. The proposed
simplified modulation technique paves the way for more straightforward and
efficient control of multilevel inverters, enabling their widespread adoption and
integration into modern power electronic systems. Through the amalgamation of
sinusoidal pulse width modulation (SPWM) with a high-frequency square wave
pulse, this controlling technique attains energy equilibrium across the coupling
capacitor. The modulation scheme incorporates a simplified switching pattern
and a decreased count of voltage references, thereby simplifying the control
algorithm.
A review on features and methods of potential fishing zoneIJECEIAES
This review focuses on the importance of identifying potential fishing zones in seawater for sustainable fishing practices. It explores features like sea surface temperature (SST) and sea surface height (SSH), along with classification methods such as classifiers. The features like SST, SSH, and different classifiers used to classify the data, have been figured out in this review study. This study underscores the importance of examining potential fishing zones using advanced analytical techniques. It thoroughly explores the methodologies employed by researchers, covering both past and current approaches. The examination centers on data characteristics and the application of classification algorithms for classification of potential fishing zones. Furthermore, the prediction of potential fishing zones relies significantly on the effectiveness of classification algorithms. Previous research has assessed the performance of models like support vector machines, naïve Bayes, and artificial neural networks (ANN). In the previous result, the results of support vector machine (SVM) were 97.6% more accurate than naive Bayes's 94.2% to classify test data for fisheries classification. By considering the recent works in this area, several recommendations for future works are presented to further improve the performance of the potential fishing zone models, which is important to the fisheries community.
Electrical signal interference minimization using appropriate core material f...IJECEIAES
As demand for smaller, quicker, and more powerful devices rises, Moore's law is strictly followed. The industry has worked hard to make little devices that boost productivity. The goal is to optimize device density. Scientists are reducing connection delays to improve circuit performance. This helped them understand three-dimensional integrated circuit (3D IC) concepts, which stack active devices and create vertical connections to diminish latency and lower interconnects. Electrical involvement is a big worry with 3D integrates circuits. Researchers have developed and tested through silicon via (TSV) and substrates to decrease electrical wave involvement. This study illustrates a novel noise coupling reduction method using several electrical involvement models. A 22% drop in electrical involvement from wave-carrying to victim TSVs introduces this new paradigm and improves system performance even at higher THz frequencies.
Electric vehicle and photovoltaic advanced roles in enhancing the financial p...IJECEIAES
Climate change's impact on the planet forced the United Nations and governments to promote green energies and electric transportation. The deployments of photovoltaic (PV) and electric vehicle (EV) systems gained stronger momentum due to their numerous advantages over fossil fuel types. The advantages go beyond sustainability to reach financial support and stability. The work in this paper introduces the hybrid system between PV and EV to support industrial and commercial plants. This paper covers the theoretical framework of the proposed hybrid system including the required equation to complete the cost analysis when PV and EV are present. In addition, the proposed design diagram which sets the priorities and requirements of the system is presented. The proposed approach allows setup to advance their power stability, especially during power outages. The presented information supports researchers and plant owners to complete the necessary analysis while promoting the deployment of clean energy. The result of a case study that represents a dairy milk farmer supports the theoretical works and highlights its advanced benefits to existing plants. The short return on investment of the proposed approach supports the paper's novelty approach for the sustainable electrical system. In addition, the proposed system allows for an isolated power setup without the need for a transmission line which enhances the safety of the electrical network
Bibliometric analysis highlighting the role of women in addressing climate ch...IJECEIAES
Fossil fuel consumption increased quickly, contributing to climate change
that is evident in unusual flooding and draughts, and global warming. Over
the past ten years, women's involvement in society has grown dramatically,
and they succeeded in playing a noticeable role in reducing climate change.
A bibliometric analysis of data from the last ten years has been carried out to
examine the role of women in addressing the climate change. The analysis's
findings discussed the relevant to the sustainable development goals (SDGs),
particularly SDG 7 and SDG 13. The results considered contributions made
by women in the various sectors while taking geographic dispersion into
account. The bibliometric analysis delves into topics including women's
leadership in environmental groups, their involvement in policymaking, their
contributions to sustainable development projects, and the influence of
gender diversity on attempts to mitigate climate change. This study's results
highlight how women have influenced policies and actions related to climate
change, point out areas of research deficiency and recommendations on how
to increase role of the women in addressing the climate change and
achieving sustainability. To achieve more successful results, this initiative
aims to highlight the significance of gender equality and encourage
inclusivity in climate change decision-making processes.
Voltage and frequency control of microgrid in presence of micro-turbine inter...IJECEIAES
The active and reactive load changes have a significant impact on voltage
and frequency. In this paper, in order to stabilize the microgrid (MG) against
load variations in islanding mode, the active and reactive power of all
distributed generators (DGs), including energy storage (battery), diesel
generator, and micro-turbine, are controlled. The micro-turbine generator is
connected to MG through a three-phase to three-phase matrix converter, and
the droop control method is applied for controlling the voltage and
frequency of MG. In addition, a method is introduced for voltage and
frequency control of micro-turbines in the transition state from gridconnected mode to islanding mode. A novel switching strategy of the matrix
converter is used for converting the high-frequency output voltage of the
micro-turbine to the grid-side frequency of the utility system. Moreover,
using the switching strategy, the low-order harmonics in the output current
and voltage are not produced, and consequently, the size of the output filter
would be reduced. In fact, the suggested control strategy is load-independent
and has no frequency conversion restrictions. The proposed approach for
voltage and frequency regulation demonstrates exceptional performance and
favorable response across various load alteration scenarios. The suggested
strategy is examined in several scenarios in the MG test systems, and the
simulation results are addressed.
Enhancing battery system identification: nonlinear autoregressive modeling fo...IJECEIAES
Precisely characterizing Li-ion batteries is essential for optimizing their
performance, enhancing safety, and prolonging their lifespan across various
applications, such as electric vehicles and renewable energy systems. This
article introduces an innovative nonlinear methodology for system
identification of a Li-ion battery, employing a nonlinear autoregressive with
exogenous inputs (NARX) model. The proposed approach integrates the
benefits of nonlinear modeling with the adaptability of the NARX structure,
facilitating a more comprehensive representation of the intricate
electrochemical processes within the battery. Experimental data collected
from a Li-ion battery operating under diverse scenarios are employed to
validate the effectiveness of the proposed methodology. The identified
NARX model exhibits superior accuracy in predicting the battery's behavior
compared to traditional linear models. This study underscores the
importance of accounting for nonlinearities in battery modeling, providing
insights into the intricate relationships between state-of-charge, voltage, and
current under dynamic conditions.
Smart grid deployment: from a bibliometric analysis to a surveyIJECEIAES
Smart grids are one of the last decades' innovations in electrical energy.
They bring relevant advantages compared to the traditional grid and
significant interest from the research community. Assessing the field's
evolution is essential to propose guidelines for facing new and future smart
grid challenges. In addition, knowing the main technologies involved in the
deployment of smart grids (SGs) is important to highlight possible
shortcomings that can be mitigated by developing new tools. This paper
contributes to the research trends mentioned above by focusing on two
objectives. First, a bibliometric analysis is presented to give an overview of
the current research level about smart grid deployment. Second, a survey of
the main technological approaches used for smart grid implementation and
their contributions are highlighted. To that effect, we searched the Web of
Science (WoS), and the Scopus databases. We obtained 5,663 documents
from WoS and 7,215 from Scopus on smart grid implementation or
deployment. With the extraction limitation in the Scopus database, 5,872 of
the 7,215 documents were extracted using a multi-step process. These two
datasets have been analyzed using a bibliometric tool called bibliometrix.
The main outputs are presented with some recommendations for future
research.
Use of analytical hierarchy process for selecting and prioritizing islanding ...IJECEIAES
One of the problems that are associated to power systems is islanding
condition, which must be rapidly and properly detected to prevent any
negative consequences on the system's protection, stability, and security.
This paper offers a thorough overview of several islanding detection
strategies, which are divided into two categories: classic approaches,
including local and remote approaches, and modern techniques, including
techniques based on signal processing and computational intelligence.
Additionally, each approach is compared and assessed based on several
factors, including implementation costs, non-detected zones, declining
power quality, and response times using the analytical hierarchy process
(AHP). The multi-criteria decision-making analysis shows that the overall
weight of passive methods (24.7%), active methods (7.8%), hybrid methods
(5.6%), remote methods (14.5%), signal processing-based methods (26.6%),
and computational intelligent-based methods (20.8%) based on the
comparison of all criteria together. Thus, it can be seen from the total weight
that hybrid approaches are the least suitable to be chosen, while signal
processing-based methods are the most appropriate islanding detection
method to be selected and implemented in power system with respect to the
aforementioned factors. Using Expert Choice software, the proposed
hierarchy model is studied and examined.
Enhancing of single-stage grid-connected photovoltaic system using fuzzy logi...IJECEIAES
The power generated by photovoltaic (PV) systems is influenced by
environmental factors. This variability hampers the control and utilization of
solar cells' peak output. In this study, a single-stage grid-connected PV
system is designed to enhance power quality. Our approach employs fuzzy
logic in the direct power control (DPC) of a three-phase voltage source
inverter (VSI), enabling seamless integration of the PV connected to the
grid. Additionally, a fuzzy logic-based maximum power point tracking
(MPPT) controller is adopted, which outperforms traditional methods like
incremental conductance (INC) in enhancing solar cell efficiency and
minimizing the response time. Moreover, the inverter's real-time active and
reactive power is directly managed to achieve a unity power factor (UPF).
The system's performance is assessed through MATLAB/Simulink
implementation, showing marked improvement over conventional methods,
particularly in steady-state and varying weather conditions. For solar
irradiances of 500 and 1,000 W/m2
, the results show that the proposed
method reduces the total harmonic distortion (THD) of the injected current
to the grid by approximately 46% and 38% compared to conventional
methods, respectively. Furthermore, we compare the simulation results with
IEEE standards to evaluate the system's grid compatibility.
Enhancing photovoltaic system maximum power point tracking with fuzzy logic-b...IJECEIAES
Photovoltaic systems have emerged as a promising energy resource that
caters to the future needs of society, owing to their renewable, inexhaustible,
and cost-free nature. The power output of these systems relies on solar cell
radiation and temperature. In order to mitigate the dependence on
atmospheric conditions and enhance power tracking, a conventional
approach has been improved by integrating various methods. To optimize
the generation of electricity from solar systems, the maximum power point
tracking (MPPT) technique is employed. To overcome limitations such as
steady-state voltage oscillations and improve transient response, two
traditional MPPT methods, namely fuzzy logic controller (FLC) and perturb
and observe (P&O), have been modified. This research paper aims to
simulate and validate the step size of the proposed modified P&O and FLC
techniques within the MPPT algorithm using MATLAB/Simulink for
efficient power tracking in photovoltaic systems.
Adaptive synchronous sliding control for a robot manipulator based on neural ...IJECEIAES
Robot manipulators have become important equipment in production lines, medical fields, and transportation. Improving the quality of trajectory tracking for
robot hands is always an attractive topic in the research community. This is a
challenging problem because robot manipulators are complex nonlinear systems
and are often subject to fluctuations in loads and external disturbances. This
article proposes an adaptive synchronous sliding control scheme to improve trajectory tracking performance for a robot manipulator. The proposed controller
ensures that the positions of the joints track the desired trajectory, synchronize
the errors, and significantly reduces chattering. First, the synchronous tracking
errors and synchronous sliding surfaces are presented. Second, the synchronous
tracking error dynamics are determined. Third, a robust adaptive control law is
designed,the unknown components of the model are estimated online by the neural network, and the parameters of the switching elements are selected by fuzzy
logic. The built algorithm ensures that the tracking and approximation errors
are ultimately uniformly bounded (UUB). Finally, the effectiveness of the constructed algorithm is demonstrated through simulation and experimental results.
Simulation and experimental results show that the proposed controller is effective with small synchronous tracking errors, and the chattering phenomenon is
significantly reduced.
Remote field-programmable gate array laboratory for signal acquisition and de...IJECEIAES
A remote laboratory utilizing field-programmable gate array (FPGA) technologies enhances students’ learning experience anywhere and anytime in embedded system design. Existing remote laboratories prioritize hardware access and visual feedback for observing board behavior after programming, neglecting comprehensive debugging tools to resolve errors that require internal signal acquisition. This paper proposes a novel remote embeddedsystem design approach targeting FPGA technologies that are fully interactive via a web-based platform. Our solution provides FPGA board access and debugging capabilities beyond the visual feedback provided by existing remote laboratories. We implemented a lab module that allows users to seamlessly incorporate into their FPGA design. The module minimizes hardware resource utilization while enabling the acquisition of a large number of data samples from the signal during the experiments by adaptively compressing the signal prior to data transmission. The results demonstrate an average compression ratio of 2.90 across three benchmark signals, indicating efficient signal acquisition and effective debugging and analysis. This method allows users to acquire more data samples than conventional methods. The proposed lab allows students to remotely test and debug their designs, bridging the gap between theory and practice in embedded system design.
Detecting and resolving feature envy through automated machine learning and m...IJECEIAES
Efficiently identifying and resolving code smells enhances software project quality. This paper presents a novel solution, utilizing automated machine learning (AutoML) techniques, to detect code smells and apply move method refactoring. By evaluating code metrics before and after refactoring, we assessed its impact on coupling, complexity, and cohesion. Key contributions of this research include a unique dataset for code smell classification and the development of models using AutoGluon for optimal performance. Furthermore, the study identifies the top 20 influential features in classifying feature envy, a well-known code smell, stemming from excessive reliance on external classes. We also explored how move method refactoring addresses feature envy, revealing reduced coupling and complexity, and improved cohesion, ultimately enhancing code quality. In summary, this research offers an empirical, data-driven approach, integrating AutoML and move method refactoring to optimize software project quality. Insights gained shed light on the benefits of refactoring on code quality and the significance of specific features in detecting feature envy. Future research can expand to explore additional refactoring techniques and a broader range of code metrics, advancing software engineering practices and standards.
Smart monitoring technique for solar cell systems using internet of things ba...IJECEIAES
Rapidly and remotely monitoring and receiving the solar cell systems status parameters, solar irradiance, temperature, and humidity, are critical issues in enhancement their efficiency. Hence, in the present article an improved smart prototype of internet of things (IoT) technique based on embedded system through NodeMCU ESP8266 (ESP-12E) was carried out experimentally. Three different regions at Egypt; Luxor, Cairo, and El-Beheira cities were chosen to study their solar irradiance profile, temperature, and humidity by the proposed IoT system. The monitoring data of solar irradiance, temperature, and humidity were live visualized directly by Ubidots through hypertext transfer protocol (HTTP) protocol. The measured solar power radiation in Luxor, Cairo, and El-Beheira ranged between 216-1000, 245-958, and 187-692 W/m 2 respectively during the solar day. The accuracy and rapidity of obtaining monitoring results using the proposed IoT system made it a strong candidate for application in monitoring solar cell systems. On the other hand, the obtained solar power radiation results of the three considered regions strongly candidate Luxor and Cairo as suitable places to build up a solar cells system station rather than El-Beheira.
An efficient security framework for intrusion detection and prevention in int...IJECEIAES
Over the past few years, the internet of things (IoT) has advanced to connect billions of smart devices to improve quality of life. However, anomalies or malicious intrusions pose several security loopholes, leading to performance degradation and threat to data security in IoT operations. Thereby, IoT security systems must keep an eye on and restrict unwanted events from occurring in the IoT network. Recently, various technical solutions based on machine learning (ML) models have been derived towards identifying and restricting unwanted events in IoT. However, most ML-based approaches are prone to miss-classification due to inappropriate feature selection. Additionally, most ML approaches applied to intrusion detection and prevention consider supervised learning, which requires a large amount of labeled data to be trained. Consequently, such complex datasets are impossible to source in a large network like IoT. To address this problem, this proposed study introduces an efficient learning mechanism to strengthen the IoT security aspects. The proposed algorithm incorporates supervised and unsupervised approaches to improve the learning models for intrusion detection and mitigation. Compared with the related works, the experimental outcome shows that the model performs well in a benchmark dataset. It accomplishes an improved detection accuracy of approximately 99.21%.
A review on techniques and modelling methodologies used for checking electrom...nooriasukmaningtyas
The proper function of the integrated circuit (IC) in an inhibiting electromagnetic environment has always been a serious concern throughout the decades of revolution in the world of electronics, from disjunct devices to today’s integrated circuit technology, where billions of transistors are combined on a single chip. The automotive industry and smart vehicles in particular, are confronting design issues such as being prone to electromagnetic interference (EMI). Electronic control devices calculate incorrect outputs because of EMI and sensors give misleading values which can prove fatal in case of automotives. In this paper, the authors have non exhaustively tried to review research work concerned with the investigation of EMI in ICs and prediction of this EMI using various modelling methodologies and measurement setups.
KuberTENes Birthday Bash Guadalajara - K8sGPT first impressionsVictor Morales
K8sGPT is a tool that analyzes and diagnoses Kubernetes clusters. This presentation was used to share the requirements and dependencies to deploy K8sGPT in a local environment.
CHINA’S GEO-ECONOMIC OUTREACH IN CENTRAL ASIAN COUNTRIES AND FUTURE PROSPECTjpsjournal1
The rivalry between prominent international actors for dominance over Central Asia's hydrocarbon
reserves and the ancient silk trade route, along with China's diplomatic endeavours in the area, has been
referred to as the "New Great Game." This research centres on the power struggle, considering
geopolitical, geostrategic, and geoeconomic variables. Topics including trade, political hegemony, oil
politics, and conventional and nontraditional security are all explored and explained by the researcher.
Using Mackinder's Heartland, Spykman Rimland, and Hegemonic Stability theories, examines China's role
in Central Asia. This study adheres to the empirical epistemological method and has taken care of
objectivity. This study analyze primary and secondary research documents critically to elaborate role of
china’s geo economic outreach in central Asian countries and its future prospect. China is thriving in trade,
pipeline politics, and winning states, according to this study, thanks to important instruments like the
Shanghai Cooperation Organisation and the Belt and Road Economic Initiative. According to this study,
China is seeing significant success in commerce, pipeline politics, and gaining influence on other
governments. This success may be attributed to the effective utilisation of key tools such as the Shanghai
Cooperation Organisation and the Belt and Road Economic Initiative.
Literature Review Basics and Understanding Reference Management.pptxDr Ramhari Poudyal
Three-day training on academic research focuses on analytical tools at United Technical College, supported by the University Grant Commission, Nepal. 24-26 May 2024
Harnessing WebAssembly for Real-time Stateless Streaming PipelinesChristina Lin
Traditionally, dealing with real-time data pipelines has involved significant overhead, even for straightforward tasks like data transformation or masking. However, in this talk, we’ll venture into the dynamic realm of WebAssembly (WASM) and discover how it can revolutionize the creation of stateless streaming pipelines within a Kafka (Redpanda) broker. These pipelines are adept at managing low-latency, high-data-volume scenarios.
Understanding Inductive Bias in Machine LearningSUTEJAS
This presentation explores the concept of inductive bias in machine learning. It explains how algorithms come with built-in assumptions and preferences that guide the learning process. You'll learn about the different types of inductive bias and how they can impact the performance and generalizability of machine learning models.
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Tunicate swarm algorithm based maximum power point tracking for photovoltaic system under non-uniform irradiation
1. International Journal of Electrical and Computer Engineering (IJECE)
Vol. 12, No. 5, October 2022, pp. 4559~4570
ISSN: 2088-8708, DOI: 10.11591/ijece.v12i5.pp4559-4570 4559
Journal homepage: http://ijece.iaescore.com
Tunicate swarm algorithm based maximum power point
tracking for photovoltaic system under non-uniform irradiation
Evi Nafiatus Sholikhah, Novie Ayub Windarko, Bambang Sumantri
Department of Electrical Engineering, Politeknik Elektronika Negeri Surabaya, Surabaya, Indonesia
Article Info ABSTRACT
Article history:
Received Jun 15, 2021
Revised Apr 20, 2022
Accepted May 15, 2022
A new maximum power point tracking (MPPT) technique based on the bio-
inspired metaheuristic algorithm for photovoltaic system (PV system) is
proposed, namely tunicate swarm algorithm-based MPPT (TSA-MPPT). The
proposed algorithm is implemented on the PV system with five PV modules
arranged in series and integrated with DC-DC buck converter. Then, the PV
system is tested in a simulation using PowerSim (PSIM) software.
TSA-MPPT is tested under varying irradiation conditions both uniform
irradiation and non-uniform irradiation. Furthermore, to evaluate the
performance, TSA-MPPT is compared with perturb & observe-based MPPT
(P&O-MPPT) and particle swarm optimization-based MPPT (PSO-MPPT).
The TSA-MPPT has an accuracy of 99% and has a reasonably practical
capability compared to the MPPT technique, which already existed before.
Keywords:
DC-DC buck converter
Maximum power point tracking
Non-uniform irradiation
Photovoltaic system
Tunicate swarm algorithm This is an open access article under the CC BY-SA license.
Corresponding Author:
Evi Nafiatus Sholikhah
Department of Electrical Engineering, Politeknik Elektronika Negeri Surabaya
Raya ITS St., Surabaya City, East Java 60111, Indonesia
Email: evinafiatus30@mail.com
1. INTRODUCTION
The installation of photovoltaic (PV) modules arranged in series-parallel to form PV arrays for solar
power generation has grown quite fast in recent years. The electrical energy produced by the PV array is very
dependent on environmental conditions, such as solar irradiation and temperature [1]. One of the factors that
affect solar irradiation is partial shading conditions. Partial shading is a condition where the PV array is
partially covered by dust accumulation, building shadows, tree shadows, or clouds. It causes the PV array to
receive non-uniform irradiation. In addition, some of the PV arrays covered in shadows will be energized by
the current generated by the PV arrays that are not covered in shadows. So, the power generated by the PV
array will decrease significantly compared to uniform irradiation conditions. This condition will also increase
the PV module temperature, causing a hotspot on the PV module, so the degradation of the PV module will
accelerate. To reduce the effect of partial shading is to install a bypass diode on each PV module. As a result
of the installation of this bypass diode, the PV array characteristics have several power peaks, namely global
maximum power point (GMPP) and local maximum power point (LMPP) [2]–[4].
One solution to increase the PV array output power efficiency is the maximum power point tracking
(MPPT) technique to track the PV array maximum power. The MPPT technique consists of an algorithm
implemented into a microcontroller system integrated with a power converter and sensors. The implemented
algorithm is used to determine the duty cycle, which is then used to control the switching of the power
converter. The MPPT technique has developed quite rapidly in recent years, with various algorithms
classified into conventional algorithms and soft computing algorithm that can track maximum power points
under uniform irradiation and non-uniform irradiation conditions [5]–[7].
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In the existing works, MPPT with conventional algorithms such as perturb & observe-based MPPT
(P&O-MPPT) is not sufficient to track GMPP with non-uniform irradiation [8]. Therefore, as an alternative,
the soft computing algorithm is implemented as an algorithm in the MPPT technique. The bio-inspired
metaheuristic algorithm based MPPT has a practical ability to track GMPP both of uniform and non-uniform
irradiation conditions [9]. Several MPPT techniques based on bio-inspired metaheuristic algorithms include
particle swarm optimization-based MPPT (PSO-MPPT) [10], flower pollination algorithm-based MPPT
(FPA-MPPT) [11], grey wolf optimization-based MPPT (GWO-MPPT) [11], artificial bee colony-based
MPPT (ABC-MPPT) [12], ant colony optimization-based MPPT (ACO-MPPT) [13], human psychology
optimization-based MPPT (HPO-MPPT) [14], grass hopper optimization-based MPPT (GHO-MPPT) [15],
and cuckoo search optimization-based MPPT (CSO-MPPT) [16]. The advantage of the bio-inspired
metaheuristic algorithm is that it can track GMPP in both non-shading conditions with uniform irradiation
and partial shading conditions with non-uniform irradiation. The fundamental differences between the
algorithms include the speed of convergence, the range of effectiveness, control parameters, the level of
design complexity, the sensors used, and the cost of hardware implementation [17]–[19].
In 2020, a new bio-inspired metaheuristic algorithm, namely the tunicate swarm algorithm (TSA)
was firstly proposed by Kaur et al. This algorithm can solve global optimization problems, both based on
unimodal and multimodal functions. The TSA algorithm has an effective performance from the performance
evaluation results compared to the eight bio-inspired metaheuristic algorithms that have existed before [20].
The advantage of the TSA algorithm is that it has a very simple mathematical modelling so that it is easy to
implement on many systems. Several examples of TSA algorithm implementation are used as parameter
extraction in PV modules [21] and optimal control and operation of fully automated distribution networks
[22].
From the background, this paper purposes to design and implement the tunicate swarm algorithm
based MPPT (TSA-MPPT). The proposed algorithm is implemented on a DC-DC Buck converter, integrated
with a PV array consisting of 5 PV modules connected in series and integrated with a voltage sensor and
current sensor. Furthermore, the system is simulated using PSIM 9.1.1. In addition, for performance
evaluation, the TSA-MPPT is compared with P&O-MPPT and PSO-MPPT. The TSA algorithm has the
advantage of being relatively easy to implement and can track both uniform and non-uniform irradiation
conditions. This paper is organized into four sections. Introduction in section 1. The research methods,
including PV module modeling, DC-DC Buck converter modeling, and the TSA algorithm described in
section 2. Then, the results and analysis are described in section 3 and the conclusion is in section 4.
2. RESEARCH METHOD
2.1. PV module modelling
Figure 1 shows an equivalent circuit of single diode PV cell model. This model is represented by a
parallel current source with parallel diode and resistor and a series of resistor connected at the output
terminals [23]. According to the single diode PV cell model, the I-V characteristics of the PV module are
formulated by (1).
𝐼𝑝𝑣 = 𝐼𝑝ℎ − 𝐼𝑠 (𝑒
𝑉𝑝𝑣+𝐼𝑝𝑣𝑅𝑠
𝑛𝑁𝑠𝑉𝑡 − 1) −
𝑉𝑝𝑣+𝐼𝑝𝑣𝑅𝑠
𝑅𝑠ℎ
(1)
𝐼𝑝𝑣 and 𝑉
𝑝𝑣 are the PV module output current and PV module output voltage. 𝐼𝑝ℎ is the photovoltaic
current, 𝐼𝑠 is the saturation current, 𝑅𝑠 is the series resistor, 𝑅𝑠ℎ is the parallel resistor, n is the diode quality
factor, 𝑁𝑠 is the number of PV cells connected to the PV module, and 𝑉𝑡 is the thermal voltage of the PV
cells defined as 𝑉𝑡 = 𝑘𝑇
𝑞
⁄ , where 𝑘 is Boltzmann’s constant (1.38×10-23
J/K), 𝑞 is the elementary charge
(1.6×10-19
C), and 𝑇 is p-n
junction temperature in Kelvin.
2.2. PV array characteristic
To produce large electrical power, PV modules are arranged to form a PV array. The amount of
power generated by the PV array is highly dependent on the amount of solar irradiation. The higher the solar
irradiation, the greater the power that the PV array can generate. PV arrays have identical characteristics with
PV modules. PV array have non-linear characteristics, which is usually represented using I-V curves and P-V
curves. Where every change in irradiation conditions, the PV array will have a maximum power point (MPP)
called the global maximum power point (GMPP). In this paper, 5 PV modules are connected in series as
shown in Figure 2(a) where the PV module parameters used are listed in Table 1.
3. Int J Elec & Comp Eng ISSN: 2088-8708
Tunicate swarm algorithm based maximum power point tracking for … (Evi Nafiatus Sholikhah)
4561
In non-shading conditions with uniform irradiation, the characteristic of the PV array has one GMPP
as shown in the orange curve in Figure 2(b). While in partial shading conditions with non-uniform irradiation
as shown in the yellow and green curves in Figure 2(b), the PV array produces several MPP peaks as a result
of installing bypass diodes in the PV array circuit and a significant decreasing in power occurs due to losses
in the form of heat. From the several MPP peaks, there is only one MPP which is the correct MPP peak or is
called GMPP while the other MPP point is called LMPP. The number of MPPs depends on the topology of
the PV array used and the partial shading conditions [2].
Figure 1. The equivalent circuit of single diode PV cell model [23]
(a) (b)
Figure 2. PV Array (a) PV modules connected in series and (b) PV array characteristic
Table 1. The PV module parameters
No. Parameter Variable Value
1 Number of cells 𝑁𝑠 36
2 Maximum Power 𝑃𝑚 100 W
3 Voltage at Pm 𝑉
𝑚 17.6 V
4 Current at Pm 𝐼𝑚 5.68 A
5 Open Circuit Voltage 𝑉
𝑜𝑐 21.8 V
6 Short Circuit Current 𝐼𝑠𝑐 6.09 A
7 Shunt Resistance 𝑅𝑠ℎ 1000 Ω
8 Series Resistance 𝑅𝑠 0.0097 Ω
9 Irradiance Intensity 𝑆0 1000 W/m2
10 Ambient Temperature 𝑇 25 o
C
Ideal Cell
Practical Cell
Iph
ID
D
Rs
Ipv
Vpv
Rsh
0
50
100
150
200
250
300
350
400
450
500
0 20 40 60 80 100 120
uniform irradiation level 3 different irradiation levels
5 different irradiation levels
GMPP
GMPP
GMPP
Power (W)
Voltage (Volt)
LMPP
LMPP
LMPP
LMPP
LMPP
LMPP
3 different irradiation levels
Uniform
irradiation level
5 different irradiation levels
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2.3. DC-DC buck converter
To implement the MPPT algorithm, a DC-DC Buck converter is used, which is installed between
the PV array and the load. It is easy to control the load impedance and maintain the PV array at its GMPP
condition by controlling the duty cycle switching converter. The parameters of DC-DC buck converter are
obtained with the following model [24]:
𝑉
𝑜 = 𝐷. 𝑉𝑖𝑛 (2)
𝐷 =
𝑇𝑜𝑛
𝑇𝑠
(3)
𝐿𝑚𝑖𝑛 =
(1−𝐷)𝑅
2𝑓
(4)
𝐿 = (
𝑉𝑖𝑛−𝑉𝑜
∆𝑖𝐿𝑓
) 𝐷 (5)
𝐶 =
1−𝐷
8𝐿(
∆𝑉𝑜
𝑉𝑜
⁄ )𝑓2
(6)
where 𝑉𝑖𝑛 is the input voltage, 𝑉
𝑜 is the output voltage, 𝐷 is the duty cycle, 𝑇𝑜𝑛 is the duration of the PWM
signal to turn on the converter switch, 𝑇𝑠 is the switching period, 𝐿𝑚𝑖𝑛 is the minimum inductance required
for the continuous current operation, 𝑅 is the load resistor. 𝐿 is the filter inductor and 𝐶 is the filter capacitor.
When, 𝑓 is the switching frequency, ∆𝑉
𝑜 is the output ripple voltage, and ∆𝑖𝐿 is the inductor ripple current.
The parameters of DC-DC buck converter as shown in Table 2. Then, the equivalent circuit of DC-DC buck
converter as shown in Figure 3.
Table 2. The parameters of buck converter
No. Parameter Variable Value
1 Switching Frequency 𝑓 20 kHz
2 Inductor 𝐿 1.11 mH
3 Capacitor 𝐶 177.15 µF
4 Load Resistor 𝑅 3.528 Ω
Figure 3. The equivalent circuit of DC-DC buck converter
2.4. TSA based MPPT (TSA-MPPT)
The TSA global optimization algorithm described in paper [20] is now applied as an MPPT
technique for PV array systems operating under uniform irradiation and non-uniform irradiation through
direct control. In TSA-MPPT, each tunicate search agent is defined as the duty cycle (𝐷) of the DC-DC
converter. In first iteration, the random duty cycle initialization at 5 point positions where the range of duty
cycle are 0% until 100%. Then the position of each duty cycle called 𝐷(𝑖). If we use 5 positions of duty cycle
as agents, the position can define as [𝐷1,𝐷2, 𝐷3, 𝐷4, 𝐷5]. The position of each duty cycle will be evaluated by
a fitness function. In this work, the fitness function utilizes the PV array output voltage (𝑉
𝑝𝑣) and the PV
array output current (𝐼𝑝𝑣). The best position is defined by how much PV array output power (𝑃𝑝𝑣) generated
by the duty cycle. The fitness function in this work is formulated as (7).
Duty Cycle
Vin L C R Vo
Diode
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𝑃𝑝𝑣 = 𝑉
𝑝𝑣 × 𝐼𝑝𝑣 (7)
Then, to update the duty cycle, the TSA algorithm depends on a random vector which is formulated as (8).
𝐴
⃗ =
𝑐2+𝑐3−(2∙𝑐1)
[𝑃𝑚𝑖𝑛+𝑐1∙𝑃𝑚𝑎𝑥−𝑃𝑚𝑖𝑛]
(6)
Vector 𝐴
⃗ is a random vector to avoid conflicts between agents. Where 𝑐1, 𝑐2, and 𝑐3 are random numbers
with range [0,1]. 𝑃𝑚𝑖𝑛 and 𝑃
𝑚𝑎𝑥 are the initial and subordinate speeds with values are 1 and 4, respectively.
Then, for the position of duty cycle to ensure around the MPP can be formulated in (9). So, for update the
duty cycle can be formulated in (10):
𝐷(𝑖) = {
𝐷𝑏𝑒𝑠𝑡 + 𝐴
⃗ ∙ |𝐷𝑏𝑒𝑠𝑡 − 𝑟𝑎𝑛𝑑 ∙ 𝐷(𝑖)| if 𝑟𝑎𝑛𝑑 ≥ 0.5
𝐷𝑏𝑒𝑠𝑡 − 𝐴
⃗ ∙ |𝐷𝑏𝑒𝑠𝑡 − 𝑟𝑎𝑛𝑑 ∙ 𝐷(𝑖)| if 𝑟𝑎𝑛𝑑 < 0.5
(9)
𝐷(𝑖 + 1) =
𝐷(𝑖)+𝐷(𝑖+1)
2+𝑐1
(10)
where 𝐷(𝑖 + 1) represents the updated duty cycle and 𝑟𝑎𝑛𝑑 is random value with range [0,1]. The flowchart
of TSA-MPPT as shown in Figure 4.
Figure 4. Flowchart of TSA-MPPT
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The step by step for TSA-MPPT are:
− Step 1: Initialize the position of duty cycles 𝐷(𝑖) and TSA parameters such us 𝑃𝑚𝑖𝑛 = 1, 𝑃𝑚𝑎𝑥 = 4,
𝑐1, 𝑐2, 𝑐3, 𝑟𝑎𝑛𝑑, 𝐴
⃗, Max Iteration=10
− Step 2: Sense the PV array output voltage (𝑉
𝑝𝑣) and the PV array output current (𝐼𝑝𝑣) generated by duty
cycle 𝐷(𝑖).
− Step 3: Calculate the PV array output power (𝑃𝑝𝑣) generated by duty cycle 𝐷(𝑖) with (7).
− Step 4: Evaluate the position of duty cycle by how much the PV array output power (𝑃𝑝𝑣) generated by
the position of duty cycle 𝐷(𝑖).
− Step 5: Update the TSA parameters using (8) and (9), then update the position of duty cycle with (10)
− Step 6: Increase iteration step by step, and if not the same to Max Iteration, repeat step 2 until step 5
− Step 7: Output the best position of duty cycle obtained so far for control switching of DC-DC buck
converter. The best duty cycle position must be generated PV array output power (𝑃𝑝𝑣) at GMPP.
3. RESULTS AND DISCUSSION
For implementing the TSA-MPPT, it is validated using a simulation with PowerSim (PSIM) 9.1.1
software, as shown in Figure 5. PV array arranged by 5 PV modules connected in series integrated with
DC-DC Buck converter. Furthermore, to determine the algorithm's performance, TSA-MPPT is compared
with the P&O-MPPT [25], [26] and PSO-MPPT [10]. The system was tested under several conditions with
uniform irradiation and non-uniform irradiation. Five cases are used to test and analyze the performance of
each algorithm. In case 1, PV array in non-shading condition with uniform irradiation, which is the PV array
characteristic have only one MPP. In case 2, case 3, case 4, and case 5, PV array under partial shading
condition with different irradiation levels, which is the PV array characteristics have several MPP. The
illustration of PV array characteristics in 5 cases is shown in Figure 6. From the figure, can know that each of
cases have different characteristic with other. Besides that, TSA-MPPT also tested under fast varying
irradiation change. The purpose of the TSA-MPPT is to reach the GMPP and maintain the duty cycle stay at
GMPP.
Figure 5. Simulation circuit in PSIM
MPPT_Algorithm
Vpv
Ipv
PWM
V
duty
7. Int J Elec & Comp Eng ISSN: 2088-8708
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3.1. Under uniform irradiation
In case 1, TSA-MPPT was tested under non-shading conditions with uniform irradiation of
1000 W/m2
while the temperature was assumed to be constant at 25 o
C. The simulation results show power
tracking to MPP and duty cycle movement is shown in Figure 6. For the P&O-MPPT, the change in duty
cycle movement by a fixed step of 3%. As for the PSO-MPPT and TSA-MPPT, the duty cycle changes
follow each algorithm's random variable step size. From the simulation results in Figure 7, the P&O-MPPT
reaches the MPP point quickly at t=0.15 s, but there are oscillations in the MPP condition. Therefore, it
cannot be stable for both the power and duty cycle.
Figure 6. PV characteristic of five cases
Figure 7. The simulation result of case 1: power and duty cycle waveform
On the other side, the PSO-MPPT can track GMPP correctly at t=1.2 s, and there is no oscillation
during MPP conditions. Still, there is a very fluctuating power transient before reaching MPP. With TSA, it
can track MPP correctly at t=1.2 s, there is no oscillation during MPP, and power fluctuations before
reaching MPP are also more stable when compared to PSO-MPPT. With the TSA-MPPT, in this condition, it
has an accuracy of 99.96%. From the comparison results, the performance of PSO and TSA has the same
time convergence characteristics to reach the MPP point. However, TSA-MPPT is superior in reducing
power fluctuations before reaching the MPP, and there is no oscillation after reaching the MPP.
GMPP
GMPP
GMPP
GMPP
GMPP
Case 1
Case 2
Case 3
Case 4
Case 5
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3.2. Under non-uniform irradiation
To determine the algorithm's performance for tracking GMPP under non-uniform irradiation
conditions, TSA-MPPT was tested in 4 cases of non-uniform irradiation with different partial shading levels,
and the temperature was assumed to be constant at 25 C. In case 2, the PV array is assumed to receive
irradiation with two different irradiation levels, 1000 W/m2
, and 500 W/m2
. The PV array characteristic have
2 MPP points, as shown in Figure 6. TSA-MPPT and PSO-MPPT successfully tracked GMPP correctly, but
P&O-MPPT cannot track the GMPP, so the power generated is below the actual GMPP power, as shown in
Figure 8. TSA has the best performance for case 2.
In case 3, the PV array is assumed to receive irradiation with three different irradiation levels,
1000 W/m2
, 800 W/m2
, and 300 W/m2
. Therefore, the PV array characteristic have 3 MPP points, as shown
in Figure 6. From the simulation results, TSA-MPPT, PSO-MPPT, and P&O-MPPT successfully tracked
GMPP correctly. Still, for P&O-MPPT, there were power oscillations during MPP, as well as PSO-MPPT,
there was a very fluctuating power transient before reaching MPP, as shown in Figure 9. Thus, TSA still has
the best performance when compared to P&O-MPPT and PSO-MPPT for case 3.
Figure 8. The simulation result of case 2: power and duty cycle waveform
Figure 9. The simulation result of case 3: power and duty cycle waveform
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In case 4, the PV array is assumed to receive irradiation with four different irradiation levels,
1000 W/m2
, 500 W/m2
, 900 W/m2
, and 100 W/m2
, so that the PV array characteristic have 4 MPP points, as
shown in Figure 6. TSA-MPPT and PSO-MPPT managed to track GMPP correctly, but P&O-MPPT could
not track GMPP, so the power generated was below the actual GMPP power, as shown in Figure 10. Thus,
TSA has the best performance for case 4.
In case 5, the PV array is assumed to get irradiation with five different irradiation levels, namely
1000 W/m2
, 300 W/m2
, 400 W/m2
, 600 W/m2
, and 800 W/m2
. The the PV array characteristic have 5 MPP
points, as shown in Figure 6. From the simulation results, TSA-MPPT, PSO-MPPT, and P&O-MPPT
managed to track GMPP correctly. Still, for P&O-MPPT, there are power oscillations during MPP, as well as
PSO-MPPT, there is a very fluctuating power transient before reaching MPP, as shown in Figure 11. Thus,
TSA still has the best performance when compared to P&O-MPPT and PSO-MPPT for case 5. The detail of
simulation results can be shown in Table 3.
Figure 10. The simulation result of case 4: power and duty cycle waveform
Figure 11. The simulation result of case 5: power and duty cycle waveform
PSO
PSO
TSA
TSA
P&O
P&O
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3.3. Under varrying irradiation change
In addition, TSA-MPPT was also tested under varying irradiation change conditions [27]. First, the
PV array is conditioned to receive uniform irradiation of 1000 W/m2
for 1.6 s as 1st
condition, then it
changes to a non-uniform irradiation condition with 3 different irradiation levels, 1000 W/m2
, 500 W/m2
,
and 100 W/m2
for 1.6 s as 2nd
condition, then the irradiation changed again with 5 different irradiation levels,
1000 W/m2
, 900 W/m2
, 700 W/m2
, 400 W/m2, and 300 W/m2
for 1.6 s as 3rd
condition.
Table 3. Simulation results
Case Method Pmpp (W) Pmppt (W) Duty cycle (%) Time to reach MPP (s) Accuracy (%)
1 P&O 500.28 499.9 49 0.15 99.92%
PSO 495.61 49.37 1.2 99.07%
TSA 500.09 47.33 1.2 99.96%
2 P&O 300.1 284.34 31 0.12 94.75%
PSO 300 61.4 1.22 99.97%
TSA 300.06 61.8 1.2 99.99%
3 P&O 341.28 340.79 49 0.15 99.86%
PSO 336.5 49.21 1.22 98.60%
TSA 341.09 47.33 1.22 99.94%
4 P&O 285.1 234.61 37 0.15 82.29%
PSO 284.99 58.69 1.23 99.96%
TSA 285.03 61.8 1.22 99.98%
5 P&O 202.03 201.85 49 0.1 99.91%
PSO 194.78 44.65 1.2 96.41%
TSA 201.51 46.56 1.22 99.74%
From the simulation results shown in Figure 12, TSA-MPPT has the best tracking ability compared
to P&O-MPPT and PSO-MPPT, where TSA-MPPT succeeded in tracking GMPP in 3 irradiation conditions
changes were quite fast with the accuracy is 99.9%. Meanwhile, P&O-MPPT is less precise in tracking
GMPP during the 2nd
condition change, and PSO-MPPT is less accurate in tracking GMPP in the
3rd
condition. Overall, the comparison of the performance evaluations of TSA-MPPT, P&O-MPPT, and
PSO-MPPT can be shown in Table 4.
Figure 12. The simulation result of varrying irradiation change
PSO
PSO
TSA
TSA
P&O
P&O
11. Int J Elec & Comp Eng ISSN: 2088-8708
Tunicate swarm algorithm based maximum power point tracking for … (Evi Nafiatus Sholikhah)
4569
Table 4. Performance evaluation
Method Parameter Performance Analysis
P&O Duty cycle star=40%
Duty cycle step=3%
- Faster tracking;
- Has oscillation at MPP;
- Good tracking for uniform irradiation
- High accuracy.
PSO Duty cycle initialization=5
{18%, 36%, 54%, 72%, 90%}
MaxIteration=10
𝑤1=0.4
𝑐1=1.6
𝑐2=1.8
- Faster Tracking;
- No oscillation at MPP;
- Good tracking performance, but in several condition can’t track GMPP
- Have very fluctuating power and duty before reach MPP
- High accuracy
TSA Duty cycle initialization=5
{18%, 36%, 54%, 72%,90%}
MaxIteration=10
𝑃𝑚𝑎𝑥=4
𝑃𝑚𝑖𝑛=1
- Faster Tracking;
- No oscillation at MPP;
- Good tracking performance for uniform and non-uniform irradiation
condition;
- Have fluctuating power and duty before reach MPP, but more stable
than PSO;
- High accuracy.
4. CONCLUSION
In this paper, the TSA-MPPT is proposed. TSA-MPPT have good performance both in tracking
ability and accuracy. It has good tracking ability in both uniform and non-uniform irradiation conditions even
for complex partial shading with five different irradiation levels. With almost zero steady-state oscillation at
MPP. The accuracy of TSA-MPPT is 99,9%. The TSA-MPPT overall shows superior performance compared
to the P&O-MPPT and PSO-MPPT. This paper is purposed to be a reference for researchers who developed
MPPT algorithm based on bio-inspired metaheuristic algorithm for PV system. For the next study, we
suggest improving the algorithm by tuning random variables or hybrid them with other algorithms to
decrease the converge time.
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BIOGRAPHIES OF AUTHORS
Evi Nafiatus Sholikhah finished her bachelor and master degrees from the
Department of Electrical Engineering at Politeknik Elektronika Negeri Surabaya (PENS) in
2020 and 2022, respectively. Her research interest includes power electronics and renewable
energy. She can be contacted by email: evinafiatus30@gmail.com.
Novie Ayub Windarko finished his bachelor and master degree from Department
of Electrical Engineering, Institut Teknologi Sepuluh Nopember Surabaya, Indonesia. He
received his Ph.D from School of Electrical Engineering, Chungbuk National University,
South Korea. He was a JICA junior visiting researcher in Hirofumi Akagi Lab., Tokyo
Institute of Technology in 2002. He has been joining to PENS since 2000. He was the head of
Renewable Energy Research Centre of PENS. He received the best paper and the best poster
award at IEEE IES 2015. He has served as reviewers for IEEE Trans. on Transportation
Electrification, IEEE Trans. on Power Electronics, Journal of Batteries, Journal of Energies
and EMITTER International Journal of Engineering Technology. His research interests include
power electronics converter, PV power generation and optimization for renewable energy. He
can be contacted by email: ayub@pens.ac.id.
Bambang Sumantri is a lecturer of Politeknik Elektronika Negeri Surabaya
(PENS), Indonesia. He received bachelor degree in Electrical Engineering from Institut
Teknologi Sepuluh Nopember (ITS), Indonesia, in 2002, M.Sc. (Master of Science) in Control
Engineering from Universiti Teknologi Petronas, Malaysia, in 2009, and Doctor of
Engineering in Mechanical Engineering, Toyohashi University of Technology, Japan, in 2015.
His research interest is in robust control system, embedded controller and renewable energy.
He can be contacted by email: bambang@pens.ac.id.