Decentralized inverse droop control for input-series–output-parallel dc–dc converters
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This document presents a decentralized inverse-droop control strategy for input-series-output-parallel DC-DC converters that improves modularity, reliability and flexibility by making each module self-contained without a central controller. The inverse-droop control causes the output voltage reference to rise under heavy loads, enabling even input voltage and output current sharing as well as stable output voltage regulation regardless of input voltage variation. The control strategy is analyzed theoretically and verified experimentally.
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The document proposes a matrix converter-based dynamic voltage restorer (DVR) system for power quality enhancement. The DVR uses a single matrix converter instead of a conventional AC/DC/AC converter. It is connected between the distribution feeder and load to mitigate voltage sags. The control system is based on dqo modeling of the matrix converter. It injects power from an energy storage device like a flywheel to restore the load voltage during sags. Simulation results show the DVR is able to effectively reduce sags and regulate the supply voltage, improving power quality.IRJET- Series and Shunt Compensation in UPFC using Cascaded Multilevel Invert...
This document discusses a transformer-less approach for series and shunt compensation using a cascaded multilevel inverter. The key points are:
1) A cascaded multilevel inverter arrangement with H-bridge cells is used for reactive power compensation without using a transformer between the series and shunt converters. This eliminates issues associated with using transformers such as cost, size, losses and response time.
2) The series converter controls voltage to regulate active and reactive power flow while the shunt converter controls current to compensate for any active power flow between the converters. This ensures no active power is exchanged so no transformer is needed.
3) Control methods for the shunt voltage and series current compensation use PI controllers
Energy management of a fuel cell serial–parallel hybrid system
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IRJET- Voltage Drop Compensation in Distribution System using Cascaded H-Brid...
1) The document proposes a cascaded multilevel inverter based dynamic voltage restorer (DVR) to compensate for voltage sags in distribution systems.
2) A cascaded multilevel inverter is used in the DVR to generate stepped output voltages with low harmonic distortion. This reduces voltage stress on switches compared to traditional DVR designs.
3) Clarke's and Park's transformation techniques are applied to control the cascaded multilevel inverter switches using pulse width modulation for voltage compensation during faults.
Power Quality Analysis Using Active NPC Multilevel inverter in PV sourced sta...
This document summarizes a research paper that analyzes power quality in a stand-alone microgrid system using an Active Neutral Point Clamped (ANPC) multilevel inverter sourced by a photovoltaic (PV) system. The document provides background on multilevel inverters and their benefits over traditional inverters. It then describes the proposed ANPC 5-level inverter topology and the simulation of the system in MATLAB/Simulink. The results show that the ANPC multilevel inverter produces lower harmonic distortion than a conventional inverter when used in the microgrid system. Key aspects like switching states, sinusoidal pulse width modulation, and total harmonic distortion are also discussed.
Power Quality Analysis Using Active NPC Multilevel inverter in PV sourced sta...
This document summarizes a research paper that analyzes power quality in a stand-alone microgrid system using an Active Neutral Point Clamped (ANPC) multilevel inverter sourced by a photovoltaic (PV) system. The document provides background on multilevel inverters and their benefits over traditional inverters. It then describes the proposed ANPC 5-level inverter topology and the simulation of the system in MATLAB/Simulink. The results show that the ANPC multilevel inverter produces lower harmonic distortion than a conventional inverter when used in the microgrid system. Key aspects like switching states, sinusoidal pulse width modulation, and total harmonic distortion are also discussed.
A010420117
This document discusses the design, simulation, and analysis of a PWM-based buck converter for low power applications. It begins with an introduction to linear regulators and switching regulators, explaining that switching regulators have higher efficiency. It then provides details on the components and operation of a basic buck converter circuit. The document describes open loop and closed loop buck converter designs, continuous and discontinuous operating modes, and simulations of a buck converter in MATLAB to maintain a constant output voltage of 7.995V with less than 4% ripple. It analyzes the performance of the converter using a PID controller to regulate the output based on variations in load and input voltage.
Seamless Transitions between Grid-Connected and Stand-Alone Operations of Dis...
Control of the Distributed Generation (DG) system is important in both grid-connected and standalone
modes and the system stability becomes very crucial during the transfer between these two modes. If the
system does not have a proper transfer procedure, severe transient voltages or currents will occur, which may
damage the entire system. A seamless transfer can ensure smooth operation and quick attainment of steady state.
In order to solve these transition problems, this paper presents the development and test of a control strategy for
DG capable of working in grid-connected and intentional islanding connection modes with seamless transitions
from both operational modes.
Fuzzy Logic Controller Based High Frequency Link AC-AC Converter For Voltage ...
Abstract—In this paper, an advanced high frequency link AC-AC Push-pull cycloconverter for the voltage compensation is proposed in order to maintain the power quality in electric grid. The proposed methodology can be achieve arbitrary output voltage without using large energy storage elements. So that the system is more steadfast and less costly compared with the conventional inverter topology. Additionally, the proposed converter does not contain any line frequency transformer, which reduces the cost further. The control scheme for the push pull cycloconverter employs the fuzzy logic controller based sinusoidal pulse width modulation (SPWM) to accomplish better performance on voltage compensation, like unbalanced voltage harmonics elimination. The simulation results are given to show the effectiveness of the proposed high frequency link AC-AC converter and fuzzy logic controller based SPWM technology
Novel 9-Steps Automatic Voltage Regulator based on Two Step-Down Transformers
A novel design and simulation results of 9-steps automatic AC voltage regulator based on one step-down transformer is presented in this paper. Avoiding the problem of surge at the AC load during controlling jump steps is done through the proposed design. Accurate and smooth controlling function is achieved as well. Instead of the necessity of increasing the number of taps of the used multi tap transformer for wide controlling range of fluctuated AC supply voltage, the proposed designed adopts using only two step down transformers with 10 Vrms, and 30 Vrms secondary voltages respectively. Through the controlling of the proposed design of AV voltage regulator, the resultant load voltage is equal the AC supply voltage as well as the suitable voltage step which may one of the following voltages; +40V, +30V, +20V, +10V, 0V, -10V, -20V, -30V, -40V. The electronic design is done Multisim software while the electrical circuit connection of step down transformers and relays contacts that is made by using PSIM software for power circuit design.
High Step-Up High-Efficiency Interleaved Converter With Voltage Multiplier Mo...
High Step-Up High-Efficiency Interleaved Converter With Voltage Multiplier Mo...best buddha e smart technologies
This document summarizes a research paper that proposes a novel high step-up converter suitable for renewable energy systems. The converter uses an interleaved boost converter combined with a voltage multiplier module composed of switched capacitors and coupled inductors to achieve high step-up gain without extreme duty ratios. This configuration reduces current stress and input current ripple. It also recycles leakage energy to improve efficiency and reduce voltage spikes across switches. Experimental results with a 40V input and 380V 1000W output showed an highest efficiency of 97.1%, confirming the converter's suitability for high power renewable applications requiring high step-up conversion.Analysis, design and modeling of dc dc converter
This document discusses the analysis, design, and modeling of DC-DC converters using Simulink. It begins with an introduction to DC-DC converters, noting common types like buck, boost, and buck-boost converters. It then provides more detailed explanations of how each converter works through circuit diagrams and waveform explanations. The document also discusses advantages and disadvantages of DC-DC converters. It presents Simulink models of buck, boost, and buck-boost converters and concludes that DC-DC converters provide regulated low-voltage power in electronics and remain an interesting topic for improved regulation and response.
High Efficiency Resonant dc/dc Converter Utilizing a Resistance Compression N...
The document describes a new high-efficiency resonant DC/DC converter topology called the Resistance Compression Network (RCN) converter. It operates with simultaneous zero-voltage switching and near zero-current switching across a wide range of input voltages, output voltages, and power levels, resulting in low switching losses. Experimental results from a 200W prototype show over 95% efficiency is maintained across an input voltage range of 25V to 40V with an output voltage of 400V, and it operates efficiently over a wide output voltage and power range. The RCN converter uses a resistance compression network and on/off control to maintain desired current waveforms and high efficiency over varying operating conditions.
Cascaded quasi z-source network on demand
1) The document presents a cascaded quasi-Z-source converter that can interconnect low voltage renewable energy sources like solar panels or fuel cells to residential loads more efficiently than a traditional single-stage converter.
2) The proposed cascaded design reduces component values, energy loss, and shoot-through duty cycle compared to a single-stage design while maintaining the same input/output conditions.
3) Simulation results showed the effectiveness of the cascaded design, which has applications in solar water pumping systems and connecting renewable energy sources to microgrids.
Voltage Stability Improvement Using VSC Based D-STATCOM with Fuzzy Controller
This document describes a study investigating the use of a voltage source converter (VSC) based distribution static compensator (D-STATCOM) with a fuzzy logic controller (FLC) for voltage stability improvement and harmonics elimination in a power distribution system. The proposed scheme employs a cascaded H-bridge multilevel inverter which has advantages over conventional devices like reduced harmonic distortion and switching losses. Simulation results show that the D-STATCOM is able to compensate reactive power, improve power factor, enhance voltage stability, and eliminate total harmonic distortion from non-linear diode rectifier loads. The fuzzy controller is used to regulate the DC capacitor voltage. The cascaded H-bridge inverter provides multi-level voltage waveforms and reduces
Bridgeless CUK Power Factor Corrector with Regulated Output Voltage
Abstract:A single-phase, bridgeless Cuk AC/DC power factor correction (PFC) rectifier with regulated positive output voltage is proposed in this work. For low output voltage product applications, the rectifier is designed to convert high input voltage to low output voltage. This work presents bridgeless single-phase AC-DC power factor correction (PFC) rectifier based on Cuk topology. The topology does not possess input diode bridge and have only single semiconductor switches in the current owing path during each interval of the switching cycle, which resulting in less conduction losses and better thermal management. This topology is designed to work in discontinuous conduction mode (DCM). The advantages of Cuk converter are also available when bridgeless circuit topology is introduced. The operation is symmetrical in two half-line cycles of input voltage. In conventional, output voltage varies according to input voltage. A closed loop control technique is designed to regulate the output voltage in the desired level. Performance and applicability of this converter is presented on the basis of simulation in MATLAB/SIMULINK.
IRJET- A New Three Phase AC-DC-AC Five Level Multilevel Inverter
The document describes a new five-level single-phase inverter structure that uses less switches and carrier signals than conventional topologies, resulting in lower total harmonic distortion. The proposed inverter converts DC power to AC power at the required voltage and frequency levels. It was modeled and simulated in Matlab Simulink software. Control of the inverter involves pulse-based switching strategies to balance voltages across levels when they are unequal, by splitting harmonic voltages into pulses that different voltage levels can generate.
Analog signal Conditioning
Signal conditioning is useful in making of the circuits related to small signals and setting the signals ranges. Sensors are having different outputs and we can set the desired ranges of the voltages as per the necessity.
New zv zcs full bridge dc-dc converter with fuzzy & pi control
The document summarizes a new ZVZCS (zero voltage zero current switching) full bridge DC-DC converter that aims to address issues with conventional full bridge converters. It introduces the proposed converter which uses an auxiliary circuit to clamp the voltage across the output diode bridge and allow ZVS operation. The document then compares the conventional and proposed converters, outlines the operating modes of the proposed converter, and evaluates different closed loop control strategies using PI and fuzzy logic controllers to improve dynamic performance.
Similar to Decentralized inverse droop control for input-series–output-parallel dc–dc converters (20)
LOW CAPACITANCE CASCADED H BRIDGE MULTILEVEL BASED STATCOM
LOW CAPACITANCE CASCADED H BRIDGE MULTILEVEL BASED STATCOM
DESIGN OF MATRIX CONVERTER BASED DYNAMIC VOLTAGE RESTORER FOR POWER QUALITY ...
DESIGN OF MATRIX CONVERTER BASED DYNAMIC VOLTAGE RESTORER FOR POWER QUALITY ...
IRJET- Series and Shunt Compensation in UPFC using Cascaded Multilevel Invert...
IRJET- Series and Shunt Compensation in UPFC using Cascaded Multilevel Invert...
Energy management of a fuel cell serial–parallel hybrid system
Energy management of a fuel cell serial–parallel hybrid system
IRJET- Voltage Drop Compensation in Distribution System using Cascaded H-Brid...
IRJET- Voltage Drop Compensation in Distribution System using Cascaded H-Brid...
Power Quality Analysis Using Active NPC Multilevel inverter in PV sourced sta...
Power Quality Analysis Using Active NPC Multilevel inverter in PV sourced sta...
Power Quality Analysis Using Active NPC Multilevel inverter in PV sourced sta...
Power Quality Analysis Using Active NPC Multilevel inverter in PV sourced sta...
Seamless Transitions between Grid-Connected and Stand-Alone Operations of Dis...
Seamless Transitions between Grid-Connected and Stand-Alone Operations of Dis...
Fuzzy Logic Controller Based High Frequency Link AC-AC Converter For Voltage ...
Fuzzy Logic Controller Based High Frequency Link AC-AC Converter For Voltage ...
Novel 9-Steps Automatic Voltage Regulator based on Two Step-Down Transformers
Novel 9-Steps Automatic Voltage Regulator based on Two Step-Down Transformers
High Step-Up High-Efficiency Interleaved Converter With Voltage Multiplier Mo...
High Step-Up High-Efficiency Interleaved Converter With Voltage Multiplier Mo...
High Efficiency Resonant dc/dc Converter Utilizing a Resistance Compression N...
High Efficiency Resonant dc/dc Converter Utilizing a Resistance Compression N...
Voltage Stability Improvement Using VSC Based D-STATCOM with Fuzzy Controller
Voltage Stability Improvement Using VSC Based D-STATCOM with Fuzzy Controller
Bridgeless CUK Power Factor Corrector with Regulated Output Voltage
Bridgeless CUK Power Factor Corrector with Regulated Output Voltage
IRJET- A New Three Phase AC-DC-AC Five Level Multilevel Inverter
IRJET- A New Three Phase AC-DC-AC Five Level Multilevel Inverter
New zv zcs full bridge dc-dc converter with fuzzy & pi control
New zv zcs full bridge dc-dc converter with fuzzy & pi control
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Design of a low voltage low-dropout regulator
This document outlines the sections and contents for a project report on designing a low-voltage low-dropout regulator. It includes sections for an abstract, introduction, literature survey, existing and proposed systems, advantages, requirements, diagrams, implementation, testing, conclusions, and references. Contact information and course offerings are also provided for i3e Technologies.
An efficient constant multiplier architecture based on vertical horizontal bi...
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Aging aware reliable multiplier design with adaptive hold logic
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A high performance fir filter architecture for fixed and reconfigurable appli...
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A generalized algorithm and reconfigurable architecture for efficient and sca...
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Reverse converter design via parallel prefix adders novel components, method...
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Pre encoded multipliers based on non-redundant radix-4 signed-digit encoding
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Energy optimized subthreshold vlsi logic family with unbalanced pull up down ...
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Variable form carrier-based pwm for boost-voltage motor driver with a charge-...
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Single inductor dual-output buck–boost power factor correction converter
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Reliability evaluation of conventional and interleaved dc–dc boost converters
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Power factor corrected zeta converter based improved power quality switched m...
The document describes a proposed switched mode power supply (SMPS) system that uses a front-end power factor corrected Zeta converter to improve power quality. The front-end converter reduces 100-Hz ripple and improves power factor and voltage regulation. Simulation and testing of a laboratory prototype showed the proposed SMPS enhanced performance under varying input voltages and loading conditions, meeting international power quality standards.
Pfc cuk converter fed bldc motor drive
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Optimized operation of current fed dual active bridge dc dc converter for pv ...
This document discusses optimized operation of a current-fed dual active bridge DC-DC converter for photovoltaic applications. It analyzes the operating principle and soft-switching conditions over a wide operating range with phase shift and duty cycle control. An optimized operating mode is proposed to achieve minimum RMS transformer current and extend the soft-switching region to reduce losses. Experimental results from a 5 kW hardware prototype verify the analysis. Contact and location information is also provided for an organization that develops IEEE software and hardware projects.
Online variable topology type photovoltaic grid-connected inverter
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An efficient constant multiplier architecture based on vertical horizontal bi...
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DEEP LEARNING FOR SMART GRID INTRUSION DETECTION: A HYBRID CNN-LSTM-BASED MODEL
As digital technology becomes more deeply embedded in power systems, protecting the communication
networks of Smart Grids (SG) has emerged as a critical concern. Distributed Network Protocol 3 (DNP3)
represents a multi-tiered application layer protocol extensively utilized in Supervisory Control and Data
Acquisition (SCADA)-based smart grids to facilitate real-time data gathering and control functionalities.
Robust Intrusion Detection Systems (IDS) are necessary for early threat detection and mitigation because
of the interconnection of these networks, which makes them vulnerable to a variety of cyberattacks. To
solve this issue, this paper develops a hybrid Deep Learning (DL) model specifically designed for intrusion
detection in smart grids. The proposed approach is a combination of the Convolutional Neural Network
(CNN) and the Long-Short-Term Memory algorithms (LSTM). We employed a recent intrusion detection
dataset (DNP3), which focuses on unauthorized commands and Denial of Service (DoS) cyberattacks, to
train and test our model. The results of our experiments show that our CNN-LSTM method is much better
at finding smart grid intrusions than other deep learning algorithms used for classification. In addition,
our proposed approach improves accuracy, precision, recall, and F1 score, achieving a high detection
accuracy rate of 99.50%.
Harnessing WebAssembly for Real-time Stateless Streaming Pipelines
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.
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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.
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Decentralized inverse droop control for input-series–output-parallel dc–dc converters
- 1. DECENTRALIZED INVERSE-DROOP CONTROL FOR INPUT-SERIES–OUTPUT- PARALLEL DC–DC CONVERTERS ABSTRACT Input-series-output-parallel dc–dc converters are suited for high-input voltage and low output voltage applications. This letter presents a decentralized inverse-droop control for this configuration. Each module is self-contained and no central controller is needed; thus, improving the system modularity, reliability, and flexibility. With the proposed inverse-droop control, the output voltage reference rises as the load becomes heavy. Even though the input voltages are not used in the inverse-droop loop, the power sharing including input voltage sharing and output current sharing can still be well achieved. Besides, the output voltage regulation characteristic is not affected by the variation of input voltage. The operation principle is introduced, and stability of the strategy is also revealed based on small signal modeling. Finally, the experiment is conducted to verify the effectiveness of the control strategy.