电力电子电路功率器件故障特征参数提取技术综述

Fault Feature Extraction Techniques for Power Devices in Power Electronic Converters: A Review

电力电子电路主功率器件是电力电子电路核心组成部分,对应其故障特征参数提取技术是实现电力电子电路故障诊断及故障预测的重要技术基础,对于提高电力电子电路的可靠性非常有帮助。该文首先介绍了目前电力电子电路主功率器件的可靠性分布情况,并以失效率较高的主功率开关器件为例,着重分析了有源功率开关MOSFET和IGBT器件失效机理以及主要衰退特征。对现阶段这两种有源功率开关器件故障特征参数提取方法进行了总结分类:故障特征参数直接提取和间接提取。在此基础上,介绍了各故障特征参数提取技术的工作原理,并对这些方法进行了归纳总结,分析了各自的优势及不足,最后指出了功率开关器件故障特征参数提取的研究难点和今后的研究方向。

Power electronics main circuit devices are the core part of power electronics circuits, and the fault feature extraction （FFE） of power electronics power devices plays an key role in realization of the diagnostics and prognostics of the power electronics converters, which has very important significance for improving the reliability of power electronics equipment. Firstly, the distribution reliability of power electronics devices is shown in the paper, and the failure mechanism and failure feature of active power switches （MOSFET, IGBT） are analyzed. The FFE of the active power switches are classified into two categories： one is the direct extraction and the other is the indirect extraction. Based on the above, the principles of each FFE of MOSFET and IGBT are introduced, and these methods are summarized. In addition, the advantage and disadvantage of each method are also discussed. At last, the difficulties and trends of the research on FFE of power switch devices are indicated.