The Experts below are selected from a list of 11493 Experts worldwide ranked by ideXlab platform
S M Muyeen - One of the best experts on this subject based on the ideXlab platform.
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design optimization of controller parameters used in variable speed wind energy conversion system by genetic algorithms
IEEE Transactions on Sustainable Energy, 2012Co-Authors: Hany M Hasanien, S M MuyeenAbstract:This paper presents an optimum design procedure for the controller used in the frequency converter of a variable speed wind turbine (VSWT) driven Permanent magnet synchronous generator (PMSG) by using genetic algorithms (GAs) and response surface methodology (RSM). The cascaded control is frequently used in the control of the frequency converter using the proportional plus integral (PI) controllers. The setting of the parameters of the PI controller used in a large system is cumbersome, especially in an electrical power system, which is difficult to be expressed by a mathematical model or transfer function. This study attempts to optimally design the parameters of the PI controllers used in the frequency converter of a variable speed wind energy conversion system (WECS). The effectiveness of the designed parameters using GAs-RSM is then compared with that obtained using a generalized reduced gradient (GRG) algorithm considering both symmetrical and unsymmetrical Faults. The Permanent Fault condition due to unsuccessful reclosing of circuit breakers is considered as well. It represents another salient feature of this study. It is found that Fault-ride-through of VSWT-PMSG can be improved considerably using the parameters of its frequency converter obtained from GAs-RSM.
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variable speed wind turbine generator system with current controlled voltage source inverter
Energy Conversion and Management, 2011Co-Authors: S M Muyeen, Ahmed Aldurra, Junji TamuraAbstract:The present popular trend of wind power generation is to use variable speed wind turbine (VSWT) driving a doubly fed induction generator (DFIG), wound field synchronous generator (WFSG) or Permanent magnet synchronous generator (PMSG). Among them, stability analyses of DFIG type of VSWT have already been reported in many literatures. However, transient stability and low voltage ride through (LVRT) characteristics analyses for synchronous generator type of VSWT is not sufficient enough. This paper focuses on detailed LVRT characteristic analysis of variable speed wind turbine driving a PMSG (VSWT–PMSG) with current controlled voltage source inverter (CC-VSI). Modeling and suitable control strategies for overall system are developed to augment the low voltage ride through capability of variable speed wind generator, considering recent wind farm grid code. Both symmetrical and unsymmetrical Faults are analyzed as network disturbances in this paper. The Permanent Fault due to unsuccessful reclosing of circuit breakers is taken into consideration, which is a salient feature of this study. Moreover, the dynamic characteristic is analyzed using real wind speed data measured in Hokkaido Island, Japan. The proposed control scheme is simulated by using the standard power system simulation package PSCAD/EMTDC and results are verified by comparing that of voltage controlled voltage source inverter scheme available in power system literature.
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low voltage ride through capability enhancement of wind turbine generator system during network disturbance
Iet Renewable Power Generation, 2009Co-Authors: S M Muyeen, Junji Tamura, Ryo Takahashi, Takafumi Murata, Mohd Hasan Ali, Yoshiyuki Matsumura, A Kuwayama, Tad MatsumotoAbstract:The energy capacitor system (ECS), composed of power electronic devices and electric double layer capacitor to enhance the low voltage ride through (LVRT) capability of fixed speed wind turbine generator system (WTGS) during network disturbance, is discussed. Control scheme of ECS is based on a sinusoidal pulse width modulation voltage source converter and DC-DC buck/boost converter composed of insulated gate bipolar transistors. Two-mass drive train model of WTGS is adopted because the drive train system modelling has great influence on the characteristics of wind generator system during network Fault. Extensive analysis of symmetrical Fault is performed with different voltage dip magnitudes and different time durations. Permanent Fault because of unsuccessful reclosing is also analysed, which is one of the salient features of this study. A real grid code defined in the power system is considered and LVRT characteristic of WTGS is analysed. Finally, it is concluded that ECS (20 MW) can significantly enhance the LVRT capability of grid connected WTGS (50 MW) during network disturbance, where simulations have been carried out by using PSCAD/EMTDC.
Junji Tamura - One of the best experts on this subject based on the ideXlab platform.
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variable speed wind turbine generator system with current controlled voltage source inverter
Energy Conversion and Management, 2011Co-Authors: S M Muyeen, Ahmed Aldurra, Junji TamuraAbstract:The present popular trend of wind power generation is to use variable speed wind turbine (VSWT) driving a doubly fed induction generator (DFIG), wound field synchronous generator (WFSG) or Permanent magnet synchronous generator (PMSG). Among them, stability analyses of DFIG type of VSWT have already been reported in many literatures. However, transient stability and low voltage ride through (LVRT) characteristics analyses for synchronous generator type of VSWT is not sufficient enough. This paper focuses on detailed LVRT characteristic analysis of variable speed wind turbine driving a PMSG (VSWT–PMSG) with current controlled voltage source inverter (CC-VSI). Modeling and suitable control strategies for overall system are developed to augment the low voltage ride through capability of variable speed wind generator, considering recent wind farm grid code. Both symmetrical and unsymmetrical Faults are analyzed as network disturbances in this paper. The Permanent Fault due to unsuccessful reclosing of circuit breakers is taken into consideration, which is a salient feature of this study. Moreover, the dynamic characteristic is analyzed using real wind speed data measured in Hokkaido Island, Japan. The proposed control scheme is simulated by using the standard power system simulation package PSCAD/EMTDC and results are verified by comparing that of voltage controlled voltage source inverter scheme available in power system literature.
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low voltage ride through capability enhancement of wind turbine generator system during network disturbance
Iet Renewable Power Generation, 2009Co-Authors: S M Muyeen, Junji Tamura, Ryo Takahashi, Takafumi Murata, Mohd Hasan Ali, Yoshiyuki Matsumura, A Kuwayama, Tad MatsumotoAbstract:The energy capacitor system (ECS), composed of power electronic devices and electric double layer capacitor to enhance the low voltage ride through (LVRT) capability of fixed speed wind turbine generator system (WTGS) during network disturbance, is discussed. Control scheme of ECS is based on a sinusoidal pulse width modulation voltage source converter and DC-DC buck/boost converter composed of insulated gate bipolar transistors. Two-mass drive train model of WTGS is adopted because the drive train system modelling has great influence on the characteristics of wind generator system during network Fault. Extensive analysis of symmetrical Fault is performed with different voltage dip magnitudes and different time durations. Permanent Fault because of unsuccessful reclosing is also analysed, which is one of the salient features of this study. A real grid code defined in the power system is considered and LVRT characteristic of WTGS is analysed. Finally, it is concluded that ECS (20 MW) can significantly enhance the LVRT capability of grid connected WTGS (50 MW) during network disturbance, where simulations have been carried out by using PSCAD/EMTDC.
Hany M Hasanien - One of the best experts on this subject based on the ideXlab platform.
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an adaptive control strategy for low voltage ride through capability enhancement of grid connected photovoltaic power plants
IEEE Transactions on Power Systems, 2016Co-Authors: Hany M HasanienAbstract:This paper presents a novel application of continuous mixed $p$ -norm (CMPN) algorithm-based adaptive control strategy with the purpose of enhancing the low voltage ride through (LVRT) capability of grid-connected photovoltaic (PV) power plants. The PV arrays are connected to the point of common coupling (PCC) through a DC-DC boost converter, a DC-link capacitor, a grid-side inverter, and a three-phase step up transformer. The DC-DC converter is used for a maximum power point tracking operation based on the fractional open circuit voltage method. The grid-side inverter is utilized to control the DC-link voltage and terminal voltage at the PCC through a vector control scheme. The CMPN algorithm-based adaptive proportional-integral (PI) controller is used to control the power electronic circuits due to its very fast convergence. The proposed algorithm updates the PI controller gains online without the need to fine tune or optimize. For realistic responses, the PV power plant is connected to the IEEE 39-bus New England test system. The effectiveness of the proposed control strategy is compared with that obtained using Taguchi approach-based an optimal PI controller taking into account subjecting the system to symmetrical, unsymmetrical Faults, and unsuccessful reclosing of circuit breakers due to the existence of Permanent Fault. The validity of adaptive control strategy is extensively verified by the simulation results, which are carried out using PSCAD/EMTDC software. With the proposed adaptive-controlled PV power plants, the LVRT capability of such system can be improved.
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design optimization of controller parameters used in variable speed wind energy conversion system by genetic algorithms
IEEE Transactions on Sustainable Energy, 2012Co-Authors: Hany M Hasanien, S M MuyeenAbstract:This paper presents an optimum design procedure for the controller used in the frequency converter of a variable speed wind turbine (VSWT) driven Permanent magnet synchronous generator (PMSG) by using genetic algorithms (GAs) and response surface methodology (RSM). The cascaded control is frequently used in the control of the frequency converter using the proportional plus integral (PI) controllers. The setting of the parameters of the PI controller used in a large system is cumbersome, especially in an electrical power system, which is difficult to be expressed by a mathematical model or transfer function. This study attempts to optimally design the parameters of the PI controllers used in the frequency converter of a variable speed wind energy conversion system (WECS). The effectiveness of the designed parameters using GAs-RSM is then compared with that obtained using a generalized reduced gradient (GRG) algorithm considering both symmetrical and unsymmetrical Faults. The Permanent Fault condition due to unsuccessful reclosing of circuit breakers is considered as well. It represents another salient feature of this study. It is found that Fault-ride-through of VSWT-PMSG can be improved considerably using the parameters of its frequency converter obtained from GAs-RSM.
Zhang Jingwei - One of the best experts on this subject based on the ideXlab platform.
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single phase adaptive reclosure for ehv uhv transmission line based on power spectrum of Faulty phase voltage
Power system technology, 2008Co-Authors: Zhang JingweiAbstract:The recovery voltage characteristic of Faulty phase under single-phase earth Fault occurred in extra high voltage/ultra high voltage (EHV/UHV) transmission lines with shunt reactors is analyzed. Analysis result shows that the recovery voltage of single-phase temporary Fault is superposed by free component and power frequency component, and its power spectrum possesses two spectral lines; yet the recovery voltage of single-phase Permanent Fault contains power frequency component only, and its power spectrum possesses one spectral line. On this basis, an identification method of single-phase earth Fault based on power spectrum of Faulty phase voltage is proposed, which distinguishes temporary Fault from Permanent Fault by the distribution of spectral line in the power spectrum of Faulty phase voltage near fundamental frequency. This criterion need not high frequency parameters, so the proposed method is easy to set and implemented. Simulation results of single-phase earth Fault occurred in UHV transmission line validate the accuracy and feasibility of the proposed criterion.
Tad Matsumoto - One of the best experts on this subject based on the ideXlab platform.
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low voltage ride through capability enhancement of wind turbine generator system during network disturbance
Iet Renewable Power Generation, 2009Co-Authors: S M Muyeen, Junji Tamura, Ryo Takahashi, Takafumi Murata, Mohd Hasan Ali, Yoshiyuki Matsumura, A Kuwayama, Tad MatsumotoAbstract:The energy capacitor system (ECS), composed of power electronic devices and electric double layer capacitor to enhance the low voltage ride through (LVRT) capability of fixed speed wind turbine generator system (WTGS) during network disturbance, is discussed. Control scheme of ECS is based on a sinusoidal pulse width modulation voltage source converter and DC-DC buck/boost converter composed of insulated gate bipolar transistors. Two-mass drive train model of WTGS is adopted because the drive train system modelling has great influence on the characteristics of wind generator system during network Fault. Extensive analysis of symmetrical Fault is performed with different voltage dip magnitudes and different time durations. Permanent Fault because of unsuccessful reclosing is also analysed, which is one of the salient features of this study. A real grid code defined in the power system is considered and LVRT characteristic of WTGS is analysed. Finally, it is concluded that ECS (20 MW) can significantly enhance the LVRT capability of grid connected WTGS (50 MW) during network disturbance, where simulations have been carried out by using PSCAD/EMTDC.