计及低穿控制的双馈风电机组故障电流特性研究  

Study on Fault Current Characteristics of DFIG when Considering Low Voltage Ride-through Control Strategy

作　　者：蒋永梅[1] 李凤婷[1] 张谦[1] 

机构地区：[1]新疆大学电气工程学院,新疆乌鲁木齐830047

出　　处：《水力发电》2016年第7期111-114,122,共5页Water Power

基　　金：国家自然科学基金项目(51267019)

摘　　要：推导了双馈风电机组在额定运行工况下定、转子短路电流的近似求解公式,分析了双馈风电机组在对称短路情况下的短路电流特性。基于Matlab/Simulink仿真平台,构建了基于磁控电抗器(Magnetically Controlled Reactor,MCR)的动态无功补偿装置(MSVC)和撬棒(Crowbar)保护电路的双馈风电机组低电压穿越模型,仿真验证了不同电压跌落下的双馈风电机组(低穿)能力,研究了Crowbar和MSVC的投切对于双馈风电机组输出短路电流的影响。The approximate formula of stator and rotor short circuit current of doubly fed wind generator （DF1G） under rated operating condition is deduced, and the short circuit current characteristics of DFIG under symmetrical short circuit are also analyzed, The low-voltage ride-through （LVRT） model of DFIG based on MSVC of Magnetically Controlled Reactor and Crowbar protection circuit is built in Matlab/Simulink simulation platform. The LVRT capabilities under different voltage drop are simulated, and the effects of Crowbar and MSVC on the output short circuit current of DFIG are also studied.

关 键 词：双馈风电机组 磁控电抗器 低电压穿越 故障特性 

分 类 号：TM743[电气工程—电力系统及自动化]