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Fault Ride Through Strategy of DFIG Using Rotor Voltage Direct Compensation Control Under Voltage Phase Angle Jump 被引量:7
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作者 Xinshou Tian Weisheng Wang +3 位作者 Xiang Li Yongning Chi Yan Li Haiyan Tang 《CSEE Journal of Power and Energy Systems》 SCIE CSCD 2019年第4期515-523,共9页
Wind power has developed rapidly in recent years,and large-scale wind power facilities connected to power grids will bring many new challenges.Some new operation charac-teristics of power grids with doubly-fed inducti... Wind power has developed rapidly in recent years,and large-scale wind power facilities connected to power grids will bring many new challenges.Some new operation charac-teristics of power grids with doubly-fed induction generator(DFIG)may exhibit,for example voltage phase angle jumps(VPAJ).VPAJ can negatively impact the fault ride through(FRT)performance of DFIG.This paper firstly investigates the physical mechanism and the operation characteristics of DFIG with VPAJ.It is noted that the current control strategies designed for voltage amplitude changes are not suitable for VPAJ.Secondly,the paper develops an FRT optimization control strategy under VPAJ which optimizes the DFIG operation characteristics.Finally,simulations of a 250 MW wind farm are presented which validate the proposed FRT strategy. 展开更多
关键词 DFIG FRT strategy rotor voltage direct compensation control voltage phase angle jump
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Voltage phase angle jump characteristic of DFIGs in case of weak grid connection and grid fault 被引量:6
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作者 Xinshou TIAN Gengyin LI +3 位作者 Yongning CHI Weisheng WANG Haiyan TANG Xiang LI 《Journal of Modern Power Systems and Clean Energy》 SCIE EI 2016年第2期256-264,共9页
In the condition of connecting large scale doubly-fed induction generators (DFIGs) into weak grid,the closely coupled interactions between wind generators and power grid becomes more severe.Some new fault characterist... In the condition of connecting large scale doubly-fed induction generators (DFIGs) into weak grid,the closely coupled interactions between wind generators and power grid becomes more severe.Some new fault characteristics including voltage phase angle jump will emerge,which will influence the power quality of power system.However,there are very few studies focusing on the mechanism of voltage phase angle jump under grid fault in a weak grid with wind turbine integration.This paper focuses on the scientific issues and carries out mechanism studies from different aspects,including mathematical deduction,field data analysis and time domain simulation.Based on the analysis of transientcharacteristics of DFIGs during the grid fault,this paper points out that the change of terminal voltage phase angle in DFIGs is an electromagnetism transition process,which is different from conventional synchronous generator.Moreover,the impact on transient characteristics of voltage phase angle are revealed in terms of fault ride through(FRT) control strategies,control parameters of current inner-loop of rotor-side converter and grid strength. 展开更多
关键词 DFIGs Weak grid Fault ride through voltage phase angle jump
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Transient characteristics and adaptive fault ride through control strategy of DFIGs considering voltage phase angle jump 被引量:3
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作者 Xinshou TIAN Yongning CHI +3 位作者 Weisheng WANG Gengyin LI Haiyan TANG Zhen WANG 《Journal of Modern Power Systems and Clean Energy》 SCIE EI 2017年第5期757-766,共10页
Wind power in China has experienced fast development in recent years. However, areas rich in wind power resources are often far away from loads centers,which leads to weak connection between wind turbines and power gr... Wind power in China has experienced fast development in recent years. However, areas rich in wind power resources are often far away from loads centers,which leads to weak connection between wind turbines and power grid. When a grid fault occurs, new transient characteristics in weak grid integrated with doubly-fed induction generators(DFIGs) may present, such as voltage phase angle jump. Current control strategies for wind turbine with strong grid connection are hard to be adapted under weak gird connection. This paper explores the transient characteristics of DFIGs under voltage phase angle jump through analyzing the operation and control characteristics of DFIGs connected into weak grid when the voltage phase angle jumps. Fault ride through(FRT) control strategy of DFIGs based on adaptive phase-locked loop is proposed to adapt weak grid condition. The reference frame of the proposed strategy will be changed in real-time to track the operation condition of DFIGs according to the terminal voltage, and different phase tracking method is adopted during the grid fault. Field data analysis and time domain simulation are carried out. The results show that voltage phase angle jumps when a grid fault occurs, which weakens the FRT capability of DFIGs, and the proposed FRT control strategy can optimize transient characteristics of DFIGs, and improve the FRT capability of DFIGs. 展开更多
关键词 DFIGs voltage phase angle jump Transient characteristics Adaptive FRT control strategy
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FRT Control Method Including Islanding Detection in PCS Model for Photovoltaic Generation
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作者 Miyazaki Takahiro Cheng Wai Tatt Yoshimura Kazuaki Taoka Hisao Kawasaki Shoji Matsuki Junya 《Journal of Energy and Power Engineering》 2013年第7期1388-1393,共6页
The experimental results by the simulated PV (photovoltaic) system for understanding the cause of disconnection when instantaneous voltage sag occurs are reported in this study. Moreover, it is understood that the P... The experimental results by the simulated PV (photovoltaic) system for understanding the cause of disconnection when instantaneous voltage sag occurs are reported in this study. Moreover, it is understood that the PCS with the voltage phase jump detection method which is one of the main causes of the disconnection. We modeled it in the simulation. When fault occurs, even though the residual voltage is more than 20% and the voltage sag time is within 1.0 s, the PCS disconnected by the voltage phase jump detection was confirmed in the simulation results. Ifa large number of PV systems are interconnected in the power system, this study is verified through the simulation that the interaction caused by the disconnection which generated by the voltage phase jump detection. This study is proposed threshold limit value of islanding detection. The validity of proposed method was verified through the simulation in this study. 展开更多
关键词 FRT function PCS islanding detection voltage sag voltage phase jump detection.
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