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Research on compound fault diagnosis of inverter based on PCA current trace

The large-scale application of inverter in energy Internet makes the fault monitoring of key power devices become the focus of attention. The damage of power tube will cause the current and voltage stress of other related power components to increase greatly, which will lead to more and more serious faults and make the system out of control. According to the advantages and disadvantages of the existing diagnosis methods, this paper proposes a diagnosis method of open circuit compound fault of inverter power tube based on principal component analysis current vector track voltage, in order to solve the problem of single tube and double tube fault. The characteristics of compound fault are analyzed in Matlab / Simulink simulation, and the accuracy of the algorithm is verified.