An Analytical Approach to Improve Stability and to Enhance Active & Reactive Power Profile of a Grid Network mainly under Fault Condition
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The initiation of fault in the Power System introduces a high degree of transient behaviour leading to the flow of a high value of current causing damage to the entire system. Several techniques has been developed for limiting the high fault current within a very short span of time but it's a continuous & ongoing research for the enthusiastic power system researchers to obtain optimum performance of the grid network by connecting certain dynamic components in the network. The modeling of the proposed grid network has been done using MATLAB/Simulink simulation software and its analysis has been evaluated under fault condition. This paper presents an analytical approach to improve stability and to enhance active & reactive power profile of grid network mainly under fault condition. The system incorporates connection of FACTS device to the network. The use of FACTS device improves the network parameters and ensures the reliability of power flow after a huge transient in the power system. A process flow model is also presented to explain the operational performance of the proposed network. See publication An analytical approach to improve stability and to enhance active & reactive power profile of a grid network mainly under fault condition See publication.
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This paper presents a novel shunt active power filter (SAPF). The power converter that is used in this SAPF is constructed from a four-leg asymmetric multi-level cascaded H-bridge (CHB) inverter that is fed from a photovoltaic source. A three-dimensional space vector modulation (3D-SVPWM) technique is adopted in this work. The multi-level inverter can generate 27-level output with harmonic content is almost zero. In addition to the capability to inject reactive power and mitigating the harmonics, the proposed SAPF has also, the ability to inject real power as it is fed from a PV source. Moreover, it has a fault-tolerant capability that makes the SAPF maintaining its operation under a loss of one leg of the multi-level inverter due to an open-circuit fault without any degradation in the performance. The proposed SAPF is designed and simulated in MATLAB SIMULINK using a single nonlinear load and the results have shown a significant reduction in total harmonics distortion (THD) of the source current under the normal operating condition and post a failure in one phase of the SAPF. Also, similar results are obtained when IEEE 15 bus network is used.2014 PV Distribution System Modeling Workshop: IEEE 1547a and 1547.1a: Removi...
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The document summarizes changes being made to IEEE standards 1547 and 1547.1 regarding distributed energy resource interconnection. Key changes include: 1) Allowing distributed resources to actively participate in voltage regulation through volt-var functions; 2) Expanding adjustable voltage and frequency ride-through requirements; 3) Allowing modulated power output in response to frequency changes. Revisions to 1547.1 will include new tests for these functions. There is also discussion of starting a full revision of 1547 to include interoperability and remove the 10MW capacity limit.Grid Interconnection of Renewable Energy Sources at the Distribution Level Wi...
Renewable energy resources (RES) are being increasingly connected in distribution systems utilizing power electronic converters.
This project presents a novel control strategy for achieving maximum benefits from these grid-interfacing inverters when installed in 3-phase 4-wire distribution systems.
The inverter can thus be utilized as:
1) power converter to inject power generated from RES to the grid &
2) shunt APF to compensate current unbalance, load current harmonics, load reactive power demand and load neutral current.
Laboratory investigation of the impact of air pollution on partial discharge ...
Studying the discharge characteristics of transmission line insulators in the presence of pollution, particularly when the contaminated layer is wet by rain, fog or condensation, is necessary for selecting the proper insulation. Therefore, identifying the major air pollutants as well as the most effective ones on the discharge performance of outdoor insulators is mandatory. A systematic approach has been proposed to evaluate the impact of dominant air pollutants of an area on partial discharge (P.D) inception voltage of specimen insulators. Based on the suggested method, determining the pollution constituents, defining the dominant pollutant of the area, finding the most commonly used insulators for medium and above distribution voltages within the geographical boundaries of the Central Province of Iran, as well as examining the effect of dominant air pollutant of the region on partial discharge inception voltage of designated insulators by laboratory measurements, are the necessary steps toward a comprehensive study of the subject.
Final Year Project IEEE 2015
This document provides summaries of 15 networking projects from TTA including the project code, title, description, and reference. The projects cover topics like delay analysis of opportunistic spectrum access MAC protocols, load balancing for network traffic measurement, key exchange protocols for parallel network file systems, anomaly detection in intrusion detection systems, and energy efficient group key agreement for wireless networks. The document provides contact information at the end for obtaining full project papers.
Control of Grid Connected PV Inverter using LMF Adaptive Method
This document summarizes a research paper that proposes a least mean square fourth (LMF) adaptive filtering technique for controlling a single-stage, three-phase grid-connected photovoltaic (PV) inverter system. The LMF-based control algorithm is compared to existing algorithms like SRFT and IRPT, and is found to involve simpler computation, be easier to implement, more stable, faster settling time, and more reliable. Simulations in MATLAB/Simulink show the LMF approach effectively extracts maximum power from the PV system and regulates the DC link voltage even under unbalanced and nonlinear loads. The results demonstrate the efficiency and consistency of the proposed LMF-based control system compared to conventional techniques.
Power Electronic Interface
Distributed energy units cannot be directly integrated into the power grid due to their inherently varying output. An interfacing technology is required. The power electronic interface is used for connecting distributed energy resources to the smart grid. It can also be used in any type of electric vehicles. It does not store energy in its circuitry. It receives power from the distributed energy source and converts it to power at the required voltage and frequency. This paper provides a brief introduction on power electronic interface. Matthew N. O. Sadiku | Adedamola A. Omotoso | Sarhan M. Musa "Power Electronic Interface" Published in International Journal of Trend in Scientific Research and Development (ijtsrd), ISSN: 2456-6470, Volume-4 | Issue-1 , December 2019, URL: https://www.ijtsrd.com/papers/ijtsrd29394.pdfPaper URL: https://www.ijtsrd.com/engineering/electrical-engineering/29394/power-electronic-interface/matthew-n-o-sadiku
Matlab Implementation of Power Quality Improvement Based on Fast Dynamic Control
This document summarizes a research paper on implementing power quality improvement using a fast dynamic control method in MATLAB. It proposes a transformer-less unified power quality conditioner (TL-UPQC) using four switching devices to form two half-bridge voltage-source inverters, one connected in parallel with the load and one in series with the AC mains sharing the same DC link. The paper presents simulation results in MATLAB showing the TL-UPQC can mitigate voltage sags/swells and current harmonics under nonlinear loads. It concludes the TL-UPQC provides improved power quality compared to other single-phase UPQC configurations.
Analysis and Implementation of Power Quality Enhancement Techniques Using Cus...
Traditional power production has become challenging for utilities due to the depletion of fossil fuels, coal, and oil. This must be done in a less expensive and more efficient manner. To meet the consumers power needs, a new source is needed. The alternative source should be sustainable and capable of fulfilling the needs of the customer. The incorporation of renewable energy into the grid is a helpful method of meeting demand. The integration of renewable energy has three main challenges frequency fluctuation, power quality issues, and power system instability. The following issues were critical in nature. An expert system based on an analytic hierarchy method is used to detect and classify power quality issues. Previously, it could detect sag, swell, transients, harmonics, interruptions, and flickers. A method for categorizing events that is error free has been proposed. The streamlined process provides for more accurate identification and classification of power quality issues. an examination of power quality issues and their mitigation via the use of unified power quality conditioners UPQC To reduce different power quality problems, an Adaptive Neuro Fuzzy Inference System ANFIS is employed. Using renewable energy sources effectively reduces environmental impact. The proposed technique corrects voltage imbalances and reduces overall harmonic distortion at the point of common connection PCC . The installation of an ANFIS controlled DVR is utilized to minimize voltage fluctuations induced by the integration of renewable energy sources and transmission line failures. With the aim of using renewable energy, a fake fault was introduced to power quality events. The ANFIS controlled DVR plan is in place to mitigate the negative impacts of power quality events. ANFIS controlled DVR is compared to a conventional surveillance method. Nonlinear loads generate voltage flickers and total harmonic distortion, therefore a distributed static compensator D STATCOM is employed to avoid these. It is recommended that D STATCOM use three control methods instantaneous power theory, synchronous vector PI control, and harmonic elimination. The D efficacy of STATCOMs is tested under severe load conditions. Various control methods will be used to evaluate and debate the proposed expert system and customized power devices. Rahul Gokhle | Pramod Kumar Rathore "Analysis and Implementation of Power Quality Enhancement Techniques Using Custom Power Devices" Published in International Journal of Trend in Scientific Research and Development (ijtsrd), ISSN: 2456-6470, Volume-5 | Issue-6 , October 2021, URL: https://www.ijtsrd.com/papers/ijtsrd46380.pdf Paper URL : https://www.ijtsrd.com/engineering/electrical-engineering/46380/analysis-and-implementation-of-power-quality-enhancement-techniques-using-custom-power-devices/rahul-gokhle
enhancement of power quality using integrated power quality controller
This document outlines the plan to develop a variable reactor-based integrated power quality controller for microgrids. It will involve an 8-week literature review on existing power quality issues and solutions, followed by 8 weeks to define the objectives to reduce harmonics, voltage fluctuations, and current. The methodology will use MATLAB/Simulink to model and test a variable reactor controller over 12 weeks. The findings will then be published in a journal paper over 8 weeks and documented in the final 10 weeks.
DC-AC Inverter using SRF Hysteresis Current Controller for Interfacing Photo-...
This document describes a DC-AC inverter using a synchronous reference frame (SRF) hysteresis current controller to interface a photovoltaic (PV) source to the AC grid. The system consists of a PV source, boost converter, and inverter connected to a load. An SRF-based hysteresis current controller is used to regulate the inverter output current and minimize total harmonic distortion. It converts the measured load currents to a rotating reference frame to extract the fundamental components as DC signals. Simulation results show the controller effectively regulates current and eliminates harmonics from a nonlinear load, allowing the PV system to support a 3 kW load.
Microgrid Protection
This document summarizes recent developments in microgrid protection techniques. It discusses (1) a differential energy based protection scheme that uses time-frequency transforms to detect faults in grid-connected and island modes, (2) an autonomous protection method for low voltage DC microgrids using current sensors and circuit breakers to isolate faulty lines, and (3) an adaptive protection approach using communication between relays and a central protection unit to dynamically adjust settings based on distributed generator conditions and fault contributions. The challenges of microgrid protection include bidirectional power flow, topological changes, intermittent generation, insufficient fault currents, and potential nuisance tripping.
A grid connected dual voltage source inverter with power quality improvement ...
A grid connected dual voltage source inverter with power quality improvement features
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Comparison of upqc and dvr in wind turbine fed fsig under asymmetric faults
This paper presents the mitigation of faults in wind turbine connected fixed speed induction generator using unified power quality conditioner and static compensator. The UPQC consists of shunt and series converters connected back-to-back through a dc-to-dc step up converter. The presence of the dc-to-dc step converter permits the UPQC to compensate faults for long duration. The series converter is connected to the supply side whereas the shunt converter is connected to the load side. The control system of the proposed UPQC is based on Id-Iq theory. The DVR consists of shunt and series converters connected back-to-back through a dc-to-dc step up converter. The presence of the dc-to-dc step converter permits the DVR to compensate faults for long duration. The series converter is connected to the supply side whereas the shunt converter is connected to the load side. The control system of the proposed DVR is based on
hysteresis voltage controlThe proposed wind turbine fed fixed speed induction generator is evaluated and simulated using MATLAB/SIMULINK environment with UPQC and DVR under asymmetric faults
www.ijerd.com
The document summarizes a novel grid-connected hybrid power generation system consisting of photovoltaic arrays, a wind turbine, and battery energy storage. The system has various operation modes to control power transfer to the electric grid. In normal mode, the maximum power from the PV and wind is transferred to the grid. In dispatch mode, the system generates a set amount of power for demand management. In averaging mode, the battery helps stabilize output by smoothing fluctuations from the renewable sources. Experimental results demonstrated the system's dynamic control performance across different operating modes.
SIMULATION OF IMPROVEMENT OF POWER QUALITY USING STATCOM-CONTROL SCHEME WITH ...
The use of wind energy generation in electrical gri d is increasing worldwide. Injection of the wind power into an electric grid affects the power quality. The generated wind power is always not constant due to its time varying nature and causing stability problems. This weak interconnection of wind generating source in the el ectrical network affects the power quality and reliability. In this paper the power quality pr oblem due to installation of wind turbine with the grid is determine. In this proposed scheme Static Compensator (STATCOM) is connected at a point of common coupling to reduce t he power quality problems. The STATCOM gives reactive power support to wind genera tor and also load. The proposed system maintains the grid voltage free from distort ion and harmonics. In this paper the effect of STATCOM is presented. The behavior of STATCOM is studied under reactive l oading condition.
IRJET- Feed-Forward Neural Network Based Transient Stability Assessment o...
This document discusses using a feed-forward neural network to assess transient stability and determine critical clearing times in a 132kV power system network in Nigeria. It first models the Afam to Port Harcourt network in ETAP software to simulate faults. MATLAB is then used to solve swing equations from the simulations. Selected data is fed into a feed-forward neural network to map out critical clearing times required by circuit breakers. The results show neural networks can complement conventional methods to evaluate critical clearing times and rotor angles for transient stability assessment of power networks.
Voltage Support and Reactive Power Control in Micro-grid using DG
The document presents a control scheme for distributed generators in a microgrid system to provide voltage support and reactive power control. The control scheme uses a hierarchical power-voltage-current structure to facilitate flexible operation of distributed generators in both grid-connected and isolated microgrid modes. Simulation results show the control scheme enables:
1) Smooth transition between grid-connected and isolated modes while maintaining voltage regulation.
2) Robust performance during disturbances like islanding events and addition of nonlinear loads.
3) Accurate power sharing between distributed generators in both modes of operation.
The study evaluates the control scheme's performance under different operating conditions and demonstrates its effectiveness in providing flexible and robust control of distributed generators in a microgrid system.
Presentationwirelesspowertransfer
Wireless power transmission involves transmitting power from one place to another without wires. It was first proposed by Nikola Tesla in 1897 using induction techniques. There are two main types: near field technologies like inductive coupling which transfers power over short distances using coils, and far field technologies like microwave power transmission which uses microwaves over longer distances but requires line of sight. While wireless power has advantages like ease of use and low maintenance, it also has disadvantages including distance constraints, high initial costs, and safety concerns over field strengths.
Techno Economic Analysis of HVDC Links for Inter State Interconnection
The design of an interregional high voltage transmission system in the US is a revolutionary technological concept that will likely play a significant role in the planning and operation of future electric power systems. This paper presents techno economics analysis of HVDC link for interstate inter connected system. there are two type transmission system used for large power supply to long distance transmission 1 HVDC high voltage dc transmission system 2 HVAC high voltage ac transmission system in which HVDC is preferable due less power loss in transmissions but it need high installing charge at the starting moment. It need two type of installation block 1 rectifier block at the sending end 2 inverter block at receiving end these both block deal with high reactive VAR. In this paper we are going to analyze technology of HVDC installation, there control, how HVDC link deal with reactive VAR reactive power compensation , how its economical if it need high installing charge .In this paper we are using 2500 MVA, 230 volt, 60 grid after rectifying power transmitted to 100 km by 100 km cable then it invert at receiving end for distribution. Here we are calculating reactive power demand for both inverter and converter both, we comparing HVDC transmutation system with HVAC transmission system economically we also coverings the environmental advantages for HVDC system. My focus in this paper is, how to minimize installing charge of HVDC link, how to increase power carrying capacity of HVDC system and how to make it environment friendly. Muhammad Shahid | MD Asif "Techno-Economic Analysis of HVDC Links for Inter-State Interconnection" Published in International Journal of Trend in Scientific Research and Development (ijtsrd), ISSN: 2456-6470, Volume-5 | Issue-5 , August 2021, URL: https://www.ijtsrd.com/papers/ijtsrd43760.pdf Paper URL: https://www.ijtsrd.com/engineering/electrical-engineering/43760/technoeconomic-analysis-of-hvdc-links-for-interstate-interconnection/muhammad-shahid
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Asymmetrical four-wire cascaded h-bridge multi-level inverter based shunt act...
Asymmetrical four-wire cascaded h-bridge multi-level inverter based shunt act...
2014 PV Distribution System Modeling Workshop: IEEE 1547a and 1547.1a: Removi...
2014 PV Distribution System Modeling Workshop: IEEE 1547a and 1547.1a: Removi...
Grid Interconnection of Renewable Energy Sources at the Distribution Level Wi...
Grid Interconnection of Renewable Energy Sources at the Distribution Level Wi...
Laboratory investigation of the impact of air pollution on partial discharge ...
Laboratory investigation of the impact of air pollution on partial discharge ...
Control of Grid Connected PV Inverter using LMF Adaptive Method
Control of Grid Connected PV Inverter using LMF Adaptive Method
Matlab Implementation of Power Quality Improvement Based on Fast Dynamic Control
Matlab Implementation of Power Quality Improvement Based on Fast Dynamic Control
Analysis and Implementation of Power Quality Enhancement Techniques Using Cus...
Analysis and Implementation of Power Quality Enhancement Techniques Using Cus...
enhancement of power quality using integrated power quality controller
enhancement of power quality using integrated power quality controller
DC-AC Inverter using SRF Hysteresis Current Controller for Interfacing Photo-...
DC-AC Inverter using SRF Hysteresis Current Controller for Interfacing Photo-...
A grid connected dual voltage source inverter with power quality improvement ...
A grid connected dual voltage source inverter with power quality improvement ...
Comparison of upqc and dvr in wind turbine fed fsig under asymmetric faults
Comparison of upqc and dvr in wind turbine fed fsig under asymmetric faults
SIMULATION OF IMPROVEMENT OF POWER QUALITY USING STATCOM-CONTROL SCHEME WITH ...
SIMULATION OF IMPROVEMENT OF POWER QUALITY USING STATCOM-CONTROL SCHEME WITH ...
IRJET- Feed-Forward Neural Network Based Transient Stability Assessment o...
IRJET- Feed-Forward Neural Network Based Transient Stability Assessment o...
Voltage Support and Reactive Power Control in Micro-grid using DG
Voltage Support and Reactive Power Control in Micro-grid using DG
Techno Economic Analysis of HVDC Links for Inter State Interconnection
Techno Economic Analysis of HVDC Links for Inter State Interconnection
Similar to An Analytical Approach to Improve Stability and to Enhance Active & Reactive Power Profile of a Grid Network mainly under Fault Condition
Unified power quality conditioner for compensating power quality problem ad
This document describes a proposed Adaptive Neuro-Fuzzy Inference System (ANFIS) based Unified Power Quality Conditioner (UPQC) to improve power quality compensation performance. A UPQC uses two voltage source inverters to compensate for both voltage and current disturbances but has high DC link capacitor discharge times. The proposed system adds an ANFIS device to generate a bias voltage that maintains the DC link voltage at a lower level. ANFIS combines neural networks and fuzzy logic to approximate nonlinear functions from numerical and linguistic data. The generated fuzzy rules are trained using a neural network to produce the desired output. Analysis shows the proposed ANFIS-based UPQC provides better power quality compensation than controllers using neural networks,
improvement in system.pptx
This document presents a research proposal for an MSc thesis titled "Improvement of Voltage Stability in Low Voltage Networks Containing Solar PV Distribution Generation". The proposal includes an introduction on the increasing global installed capacity of solar PV. It defines the problem of power quality issues like voltage deviations caused by solar PV penetration. The objectives are to model a LV network with solar PV and evaluate voltage stability under different scenarios. A literature review compares various mitigation techniques. The research questions examine the effects of DG location and optimal mitigation techniques. The outcomes will be a modeled LV network and investigation of voltage stability through simulations and calculations. A Gantt chart provides a time schedule for the research phases.
A review on SVC control for power system stability with and without auxiliary...
Since the beginning of the last century, power system stability has been recognized as a vital problem in securing system operation. Power system instability has caused many major blackouts. This paper reviewed the previous technical works consisting of various methods of optimization in controlling power system stability. The techniques presented were compared to optimize the control variables for optimization of power system stability. Power system stability enhancement has been investigated widely in literature using different ways. This paper is focusing on SVC performance for enhancing power system stability either through SVC controlled itself or SVC controlled externally by other controllers. Static VAR compensators (SVCs) are used primarily in power system for voltage control as either an end in itself or a means of achieving other objectives, such as system stabilization.The analysis on performance of the previous work such as advantages and findings of a robust method approach in each technique was included in this paper.
Power Quality Improvement Using GUPFC
The power quality issue will take new dimension due to power system restructuring and shifting trend towards
distributed generation. Huge loss in terms of time and money has made power quality problems a major anxiety for modern
industries with non-linear loads in electrical power system. Power quality consists of a large number of disturbances such
as voltage sags, swells, harmonics, notch, flicker, etc. Power quality problems can be mitigated by many methods but most
appropriate solution to mitigate these problems is FACTS devices. In this paper a brief survey of FACTS devices are
presented which are used to mitigate power quality problems.
Gl3611631165
International Journal of Engineering Research and Applications (IJERA) is an open access online peer reviewed international journal that publishes research and review articles in the fields of Computer Science, Neural Networks, Electrical Engineering, Software Engineering, Information Technology, Mechanical Engineering, Chemical Engineering, Plastic Engineering, Food Technology, Textile Engineering, Nano Technology & science, Power Electronics, Electronics & Communication Engineering, Computational mathematics, Image processing, Civil Engineering, Structural Engineering, Environmental Engineering, VLSI Testing & Low Power VLSI Design etc.
254 ishwri
The document summarizes research on Low Voltage Ride Through (LVRT) capability for wind power systems. It discusses LVRT requirements specified in grid codes that require wind turbines to remain connected during faults and provide reactive power support. It then reviews different wind turbine generator topologies and their responses to faults. Several control strategies and technologies to enable LVRT capability are presented, including chopper resistors, energy storage, and derated generator operation. Simulation results validating one control scheme are shown through various graphs. The conclusion states that combining multiple technologies can help implement LVRT and connect wind power systems to the grid more effectively.
Comparison of facts devices for two area power system stability enhancement u...
This document summarizes a research paper that compares the performance of SVC and STATCOM FACTS devices for enhancing transient stability in a two area power system modelled in MATLAB. The paper reviews previous research on using FACTS controllers like SVC, STATCOM, SSSC, TCSC and UPFC to improve power system stability. Simulation results from the paper indicate that a two machine system installed with STATCOM provided better damping of rotor angle oscillations compared to an SVC installation, demonstrating improved transient stability when using a STATCOM.
Power Quality Improvement by SRF Based Control using D-STATCOM
1) The document discusses using a D-STATCOM with synchronous reference frame (SRF) control strategy to improve power quality issues like poor voltage regulation, reactive power burden, and harmonics.
2) The SRF control strategy transforms load current signals into a rotating d-q frame for control purposes. It uses a phase-locked loop and proportional-integral controllers to generate gate pulses that control the D-STATCOM.
3) MATLAB simulations show the SRF control strategy effectively eliminates harmonics and reactive power compensation for both linear and non-linear loads, maintaining unity power factor and reducing harmonic content in source currents.
Design & Simulation of Energy Storage Unified Power Quality Conditioner (EUPQ...
Rapid consumption of energy from conventional sources can be limited by connecting more no. of distributed generation systems with the support of smart grid technology. But the impact of variation in DG power out putted may lead to power quality problems in the distributed system in which it is connected. In addition to this power system faults, non- linear loads and non-linear characteristics of converter circuits used in DG s further deteriorate quality of the power. Implementation of UPQC in the network itself solves the problems addressed but crowding of more no of DG in the network will suppress the effect of UPQC. However energy storage system integration can suppress the large power fluctuations outputted by DGs. In this paper energy storage based unified power quality conditioner (EUPQC) has been implemented using fuggy logic controller. For energy storage ultra (Super) capacitor has been used for fast rate of charging and discharging. The performance of the implemented UPQC with fuggy logic controller is compared with PI controller with the MATLAB simulation.
Comparison of FACTS Devices for Two Area Power System Stability Enhancement u...
This document compares the performance of SVC and STATCOM FACTS devices for enhancing transient stability in a two-area power system modelled in MATLAB. It first provides background on power system stability challenges and the role of FACTS devices in addressing these issues. It then reviews previous research comparing different FACTS devices. The paper models an SVC and STATCOM controller in MATLAB and simulates their performance under a three-phase fault. Simulation results indicate that the STATCOM controller provides better damping of rotor angle oscillations, suggesting it enhances transient stability more than the SVC in the two-area power system model.
ADVANCED OPTIMIZATION CIRCUIT FOR WIRELESS POWER TRANSFER
The wi-fi energy transfer (WPT) is an emerging era with increasingly more ability packages to transfer energy from a transmitter to a cellular receiver over a noticeably huge air gap. but, its extensive utility is hampered due to the relatively low performance of modern wireless power switch (WPT) structures. This study gives an idea to maximize the performance in addition to to increase the quantity of extractable electricity of a WPT system operating in resonant operation. The proposed method is primarily based on actively modifying the equal secondary-side load impedance by controlling the section-shift of the active rectifier and its output voltage degree. The offered hardware prototype represents an entire wireless charging machine, consisting of a dc–dc converter that is used to price a battery at the output of the system. Experimental results are shown for the proposed concept in comparison to a traditional synchronous rectification approach. The supplied optimization technique sincerely outperforms trendy solutions in phrases of efficiency and extractable power.
A Novel control of a Grid-Interfacing Inverter to Improve the Quality of Powe...
Renewable energy resources (RES) are being increas- ingly connected in distribution systems utilizing power electronic converters. This paper presents a novel control strategy for achieving maximum benefits from these grid-interfacing inverters when installed in 3-phase 4-wire distribution systems. The inverter is controlled to perform as a multi-function device by incorporating active power filter functionality. The inverter can thus be utilized as: 1) power converter to inject power generated from RES to the grid, and 2) shunt APF to compensate current unbalance, load current harmonics, load reactive power demand and load neutral current. All of these functions may be accomplished either individually or simultaneously. With such a control, the combination of grid-interfacing inverter and the 3-phase 4-wire linear/non-linear unbalanced load at point of common coupling appears as balanced linear load to the grid. This new control concept is demonstrated with extensive MATLAB/Simulink simulation studies and validated through digital signal processor-based laboratory experimental results.
Advance Technology in Application of Four Leg Inverters to UPQC
This article presents a novel application of four leg inverter with
conventional Sinusoidal Pulse Width Modulation (SPWM) Scheme to
Unified Power Quality Conditioner (UPQC). The Power Quality problem
became burning issues since the starting of high voltage AC transmission
system. Hence, in this article it has been discussed to mitigate the PQ issues
in high voltage AC systems through a three phase Unified Power Quality
Conditioner (UPQC) under various conditions, such as harmonic mitigation
scheme, non linear loads, sag and swell conditions as well. Also, it proposes
to control harmoincs with various artificial intelligent techniques. Thus
application of these control technique such as Neural Networks (ANN)
Fuzzy Logic makes the system performance in par with the standards
and also compared with existing system. The simulation results based on
MATLAB/Simulink are discussed in detail to support the concept developed
in the paper.
POWER SYSTEM STABILITY ENHANCEMENT BY SIMULTANEOUS AC-DC POWER TRANSMISSION_2012
This thesis examines using simultaneous AC-DC power transmission to improve power system stability. Simulation results show stability is enhanced when compared to only AC transmission. The thesis aims to emphasize the advantages of simultaneous transmission for improving stability and damping oscillations. FACTS devices allow flexible control of AC and DC power flows to achieve benefits like better transmission asset utilization and increased grid stability. Results demonstrate substantial gains in power transfer capability and reliability when converting dual AC lines to simultaneous AC-DC transmission.
Ga based optimal facts controller for maximizing loadability with stability c...
This document summarizes a research paper presented at the International Conference on Emerging Trends in Engineering and Management. The paper proposes using a genetic algorithm to determine the optimal location and settings of Flexible AC Transmission System (FACTS) devices, specifically STATCOMs, to maximize the loadability of a power system while maintaining stability constraints. The objective function aims to maximize loadability with constraints for voltage stability, generation limits, line limits, and load-generation balance. The methodology is tested on the IEEE 14-bus test system in MATLAB. In conclusion, optimally placing and setting FACTS devices using genetic algorithms can enhance power system loadability while maintaining stability.
A Grid-Tied Solar Power System with Harmonic Filter to Enhance Power Quality
This document proposes a grid-tied solar power system integrated with an active shunt harmonic filter to improve power quality. The system uses a photovoltaic array and maximum power point tracking algorithm to power a three-leg voltage source converter acting as the active harmonic filter. The filter extracts a reference current using instantaneous power theory and generates compensating current through PWM to cancel harmonics in the source current. Simulation results show the source current is cleaned of harmonics when the filter is integrated into the system.
IRJET- Power Flow Analysis of 30 Bus System using Different Methods
This document summarizes a study on power flow analysis of a 30 bus system using different methods. It analyzes the 30 bus system using Newton-Raphson, Gauss-Siedel, and Fast Decouple load flow methods. It finds that Gauss-Siedel has the lowest computational time but Newton-Raphson converges fastest and is most accurate. The study also analyzes how generator reactive power limits affect voltage stability and system loadability.
Review on power quality analysis by rajendra singh ppt
The document provides a review of power quality analysis. It begins with an introduction that defines power quality and discusses traditional power system quantities. It then discusses the motivation for improved power quality due to the connection of more sensitive loads. The document reviews literature on power quality problems and solutions. It discusses common power quality issues such as harmonics, voltage fluctuations, dips and interruptions. It also reviews methods to improve power quality using custom power devices and mitigation strategies. Finally, it provides conclusions and a list of 20 references on topics related to power quality, renewable energy systems, and the use of custom power devices.
Improvement of Power Quality using Fuzzy Logic Controller in Grid Connected P...
In this paper, the design of combined operation of UPQC and PV-ARRAY is designed. The proposed system is composed of series and shunt inverters connected back to back by a dc-link to which pv-array is connected. This system is able to compensate voltage and current related problems both in inter-connected mode and islanding mode by injecting active power to grid. The fundamental aspect is that the power electronic devices (PE) and sensitive equipments (SE) are normally designed to work in non-polluted power system, so they would suffer from malfunctions when supply voltage is not pure sinusoidal. Thus this proposed operating strategy with flexible operation mode improves the power quality of the grid system combining photovoltaic array with a control of unified power quality conditioner. Pulse Width Modulation (PWM) is used in both three phase four leg inverters. A Proportional Integral (PI) and Fuzzy Logic Controllers are used for power quality improvement by reducing the distortions in the output power. The simulated results were compared among the two controller’s strategies With pi controller and fuzzy logic controller
IRJET- Generalized UPQC System with an Improved Control Method under Distorte...
1) The document discusses a generalized unified power quality conditioner (UPQC) system with an improved control method to address power quality issues like voltage sags, swells, harmonics, and poor power factor under distorted and unbalanced load conditions.
2) A UPQC consists of shunt and series active power filters connected back-to-back via a DC link to compensate for both current and voltage issues. The control method aims to improve harmonics, reactive power compensation, and power factor correction.
3) The paper presents the design, simulation, and analysis of a UPQC using MATLAB/Simulink to address different power quality problems and supply balanced and regulated voltage under various load conditions.
Similar to An Analytical Approach to Improve Stability and to Enhance Active & Reactive Power Profile of a Grid Network mainly under Fault Condition (20)
Unified power quality conditioner for compensating power quality problem ad
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A review on SVC control for power system stability with and without auxiliary...
A review on SVC control for power system stability with and without auxiliary...
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Comparison of facts devices for two area power system stability enhancement u...
Power Quality Improvement by SRF Based Control using D-STATCOM
Power Quality Improvement by SRF Based Control using D-STATCOM
Design & Simulation of Energy Storage Unified Power Quality Conditioner (EUPQ...
Design & Simulation of Energy Storage Unified Power Quality Conditioner (EUPQ...
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Comparison of FACTS Devices for Two Area Power System Stability Enhancement u...
ADVANCED OPTIMIZATION CIRCUIT FOR WIRELESS POWER TRANSFER
ADVANCED OPTIMIZATION CIRCUIT FOR WIRELESS POWER TRANSFER
A Novel control of a Grid-Interfacing Inverter to Improve the Quality of Powe...
A Novel control of a Grid-Interfacing Inverter to Improve the Quality of Powe...
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Advance Technology in Application of Four Leg Inverters to UPQC
POWER SYSTEM STABILITY ENHANCEMENT BY SIMULTANEOUS AC-DC POWER TRANSMISSION_2012
POWER SYSTEM STABILITY ENHANCEMENT BY SIMULTANEOUS AC-DC POWER TRANSMISSION_2012
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An Analytical Approach to Improve Stability and to Enhance Active & Reactive Power Profile of a Grid Network mainly under Fault Condition
- 1. Paper Id-54 Authored By Arijit Ganguly, Rumrum Banerjee Soumya Ghatak, Plabon Saha, Aalok Bhattacharya, Rahul Shome, Suman Patra (Dept. of Electrical Engg.) University of Engineering & Management,Kolkata Presented By Soumya Ghatak Dept. of Electrical Engg. University of Engineering & Management,Kolkata
- 2. Overview of Power System network Problem in Grid network Main Objective of the paper Block diagram representation of the network under study Simulation diagram Conditions of analysis Operational Results Simulation Results Conclusion Future scope
- 4. The initiation of fault in the Power System introduces a high degree of transient behaviour leading to the flow of a high value of current causing damage to the entire system. System starts losing stability leading to high degree of oscillations in the system.
- 5. Main objective of the paper This paper presents an analytical approach to improve stability and to enhance active & reactive power profile of grid network mainly under fault condition. To obtain optimum performance of the grid network by connecting certain dynamic components in the network To improve the network parameters and ensure the reliability of power flow after a huge transient in the power system by using FACTS device.
- 6. Ge n TR 1 TR 2 Plant load Three phase break er Three phase fault TL B1 Three phase breaker 1 SUBSTATION LOAD T R 3 Three phase breaker 2 T R 4 SVC Power and voltage measurem ent LO AD Block diagram representation of the network under study B2
- 7. Simulation diagram Simulation diagram when SVC is not connected.
- 8. Simulation results (Without SVC) Time(s) Voltage Profile
- 9. Simulation results (Without SVC) Power Profile Time(s)
- 10. SIMULATION DIAGRAM Simulation diagram when SVC is connected Simulation diagram
- 11. Simulation results (With SVC) Time(s) Voltage Profile
- 12. Time(s) Time(s) Simulation results (With SVC) Power Profile
- 13. Event Action Status of SVC Profile of P,Q Case-1 3Phase Fault on Grid network Without SVC Minimum Case-2 3Phase Fault on Grid network With SVC Improved
- 14. Conclusion The profile of the receiving end voltage of the line determines satisfaction level at the consumer end and is also responsible for smooth operation of certain loads. Thus for a compensated network the profile of both reactive power as well as voltage are enhanced. The SVC basically provides reactive power compensation to the line. Since voltage of the line is coupled with reactive power, it also gets modified.
- 15. Further improvement of parameters(V,P,Q) profile by connecting some more dynamic components in the network.
- 16. [1] Power system performance improvement by using an SVC device ,Ali Abdulwahhab Abdulrazzaq; Mircea Eremia; Lucian Toma ,2014 International Symposium on Fundamentals of Electrical Engineering (ISFEE),Year: 2014 ,Pages: 1 - 6 ,IEEE Conference Publications. [2] Fishow, A.G, “Transient ans Steady State Stability margin to state a power system stability standardization”, published in UPS of Russia. [3] Canizarea.C. A, Bhattacharrya. K ,Haghighat. H,Pan. J,Tang. C and Samahy. E. I, “Reactive Power Despatch Problem in the context of Captive Electricity Market Generation, Transmission and Distribution”, Vol.4, IET issue, February 2010. [4] Application of static VAr compensators to increase power system damping,E. -Z. Zhou ,IEEE Transactions on Power Systems ,Year: 1993, Volume: 8, Issue: 2 ,Pages: 655 - 661 ,Cited by: Papers (95) ,IEEE Journals & Magazines. [5] Optimal placement and sizing of SVC for loss minimization and voltage security improvement using differential evolution algorithm ,Shraddha Udgir; Laxmi Srivastava; Manjaree Pandit,International Conference on Recent Advances and Innovations in Engineering (ICRAIE-2014) Year: 2014, Pages: 1 - 6 Cited by: Papers (3) IEEE Conference Publications.
- 17. [6] Improve power oscillation stability in a grid connected wind power system by using a Static Var Compensator ,Van-Tri Bui; Dinh-Nhon Truong; Dac-Loc Ho, 2017 International Conference on System Science and Engineering (ICSSE),Year: 2017,Pages: 200 – 203,IEEE Conference Publications. [7] Best locations of shunt SVCs for steady state voltage stability enhancement Ibrahim B. M. Taha ,2015 IEEE Conference on Energy Conversion (CENCON),Year:2015,Pages:430-435,IEEE Conference Publications. [8] Rajamani.K,Hambarde. U.K “ Islanding and Loadshedding Scheme for Captive Power Plant Power Delivery”, IEEE Transactions, Vol. 14, Jul 1999. [9] NEMA Standards Publication ICs 1-1988, General Standards for Industrial Control and Systems; ICs 2-1988, Industrial Control Devices, Controllers and Assemblies; ICs 3-1988. [10] Bindon. R.E, “Emergency operation of large steam turbine generator”, presented at South Eastern Electric Exchange, Atlanta, Georgia, October 13-14, 1966.
- 18. [11] IEEE Std 141-1986, IEEE Recommended Practice for Electric Power Distribution for Industrial Plants (ANSI). [12] IEEE Std 242-1986, IEEE Recommended Practice for Protection and Coordination of Industrial and Commercial Power Systems (ANSI). 19458. [13] SenguptaT.K.,”Studies on Assessment of Power Frequency in Interconnected Grid – Its Computer based Control and Protection”, Research Paper, The Faculty of Engineering and Technology,Department of Electrical Engineering,Jadavpur University, 2008. [14] Krishnamurti.P,“Captive Power Plant Quality Journal” of TCE Limited, Vol.4-I-pp.10,April 2006.
- 19. Thank You