双馈异步电机定子匝间短路的建模与故障诊断  

Model and Diagnosis of Stator Inter-Turn Short-Circuit Fault in DFIG

作　　者：李俊卿[1] 王志兴[1] 王悦川 

机构地区：[1]华北电力大学电气与电子工程学院,河北保定071003

出　　处：《电机与控制应用》2015年第12期64-69,共6页Electric machines & control application

基　　金：河北省自然科学基金资助项目(2014502015)

摘　　要：定子匝间短路是双馈异步电机常见故障之一,直接威胁风力发电系统的安全运行。利用多回路理论建立了双馈异步电机正常情况以及定子匝间短路情况下的数学模型,并利用MATLAB/Simulink中S函数实现了数学模型。在考虑了变流器控制策略的基础上,对双馈异步电机在正常情况下和定子绕组匝间短路的情况下进行了仿真,所得仿真结果与实际情况相符。最后,分析了正常情况和定子匝间短路情况下电磁转矩的变化,利用电磁转矩的不同来诊断定子匝间短路。The stator winding inter-turn short-circuit is one of the common faults of DFIG,it is a threat to the safe operation of wind power system. A multi-loop math model was built for stator winding of DFIG under normal and inter-turn short-circuit fault conditions and the simulation was carried out,using S-Function in MATLAB / Simulink.The simulations under normal and inter-turn short-circuit fault conditions were completed, considering control strategies of converters. The simulation results accorded with the actual situation. Finally,the analysis of the change of the electromagnetic torque under normal and stator inter-turn short-circuit fault conditions was done,the stator inter-turn short-circuit would be diagnosed with the difference of electromagnetic torque.

关 键 词：双馈异步电机 匝间短路 多回路 S函数 电磁转矩 

分 类 号：TM307.1[电气工程—电机]