Current Similarity Analysis Analysis-Based Open-Circuit Circuit Fault Diagnosis for Two-Level Two Three Three-Phase PWM Rectifier
Abstract: This paper proposed a novel single and multiple transistors open-circuit open fault diagnosis method for two two-level three-phase pulse-width width modulating rectifier based on topology symmetry analysis in healthy and faulty conditions. First, similarity measurements between any two phase current linklists contained samples in a period after reconstruction and shape analysis, such as Euclidean distance, correlation coefficient, and cosine angle, are used to describe the symmetry of topology and divide the faults into tthree hree classes, then two extra features are extracted to locate the fault to broken leg and transistors, respectively. The proposed diagnostic method is robust, low cost, and easy to insert to the existed control system. The effectiveness and merit were evaluated eval by experimental results.