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中文摘要：
考虑到传统开关函数模型只对逆变电路的控制变迁进行分析而无法描述电路的条件变迁,容易丢失电路在条件变迁过程中所表现出的故障信息,从而影响故障诊断的实时性和准确性。电力电子电路是典型的混杂系统,文章建立了一种新型容错逆变器的混杂系统模型,在此基础上提出了故障事件辨识向量的概念,并将其应用于逆变器故障的分析,仅通过故障事件辨识向量对逆变电路变迁过程中的故障事件进行辨识来完成故障诊断,对于电路变迁过程中的正常事件辨识不予考虑,减少了控制系统的数据处理量,提高了故障诊断的实时性和可靠性,实验验证了所提方法的可行性和有效性
英文摘要：
The traditional switch function model of inverters could analyze the control change of inverters,but could not be used to describe conditions change.The fault information contained in conditions change may be lost,and the real-time performance and accuracy of fault diagnosis will be reduced.Power electronic circuits were typical hybrid system.The paper established the hybrid system model for a fault-tolerant inverter,and then put forward the concept of incidents identification vector,which was applied to analyze the fault of inverter.It finished the fault diagnosis only through the identification of fault events by incidents identification vector,which could reduce the data capacity of control system,and the real time performance and reliability of fault diagnosis were improved.The simulation and experiment results show the feasibility and validity of the proposed method
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