双馈风电机组变流器故障诊断研究综述

Overview of Fault Diagnosis for Doubly Fed Induction Generator(DFIG) Converter

当前国内外对变流器的研究主要集中在变流器的控制方法和具体的故障解决方法上,而研究变流器的结构、故障代码,以及输出波形反推变流器故障的研究方法则处在刚刚起步的阶段。归纳了反推变流器故障的方法,总结了小波分析法和SVM(支持向量机)、粗糙集和基于电流信号平均值的算法的研究现状。提出了个别故障诊断方法所存在的问题,并对双馈变流器故障诊断研究的发展趋势进行了展望。

At present, the research on converters at home and abroad mainly focuses on the control methodsand specific fault solving methods of converters, while the research methods of converter structure, fault codeand output waveform back-stepping converter fault are in the initial stage. This paper summarized the methodsof converter faults and the research status of wavelet analysis and SVM, rough set and current signal averagebased algorithms. In this paper, the problems of individual fault diagnosis methods were presented, and thefuture development trend of fault diagnosis for Doubly-fed converters was prospected.