中文摘要：

随着电力电子技术的发展,功率变换器已广泛应用于电网以及工业生产等各种重要场所中,因此电力电子功率变换器的安全运行得到了研究者的广泛重视。本文以开路故障为主对功率变换器现有故障诊断方法进行了归类和总结。从基于解析模型、基于知识和基于信号处理三个方面进行了分类,介绍了各故障诊断方法的原理,并从适用性、算法复杂性、诊断时间和可靠性等角度,对这些方法进行了比较,指出了功率变换器故障诊断的难点和今后的研究方向。

英文摘要：

With the rapid development of power electronics technology,power converters have been widely used in various important places,such as in the grid,industrial production and so on. Therefore,the safe operation of power converters has attracted wide attention of researchers. This paper presents a survey on existing methods for fault diagnosis and protection of power converters and focuses on the open-circuit fault,and the existing fault diagnosis methods are categorized and summarized. With special focus on those used in three-phase power inverters,these methods are classified into three dimensions-based on analytical model,knowledge and signal processing respectively. After some basic concepts and principles of each fault diagnosis method are introduced,fault diagnosis methods of power electronic system are compared and surveyed systematically from the perspectives of applicability,complexity of algorithm,diagnostic time and reliability. And then difficulties and trends of the research on fault diagnosis of power converters are indicated.