Voltage phase angle jump characteristic of DFIGs in case of weak grid connection and grid fault

作     者：Xinshou TIAN Gengyin LI Yongning CHI Weisheng WANG Haiyan TANG Xiang LI 

作者机构：State Key Laboratory of Alternate Electrical Power System with Renewable Energy Sources(North China Electric Power University)Changping DistrictBeijing 102206China China Electric Power Research InstituteHaidian DistrictBeijing 100192China 

出 版 物：《Journal of Modern Power Systems and Clean Energy》 (现代电力系统与清洁能源学报（英文）)

年 卷 期：2016年第4卷第2期

页      面：256-264页

核心收录：

学科分类：0830[工学-环境科学与工程（可授工学、理学、农学学位）] 080801[工学-电机与电器] 0808[工学-电气工程] 08[工学] 0807[工学-动力工程及工程热物理] 

基　　金：supported by National Basic Research Program of China(973 Program)(No.2012CB215105) 

主　　题：DFIGs Weak grid Fault ride through Voltage phase angle jump 

摘      要：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.