Research on Batch Non-Intrusive Fault Detection Method for Fractional Frequency Transmission System
2022 IEEE 5th International Electrical and Energy Conference (CIEEC)(2022)
摘要
The modular multilevel matrix converter (M3C) is an important part of the fractional frequency transmission system (FFTS). With many sub-modules, the single fault detection method is cumbersome and complicated. This paper analyzes the changes of the arm current and the capacitor voltage of the sub-module under different sub-module faults in the pre-charging process of the bridge arm, analyzes and summarizes the fault types and fault location criteria of the sub-module fault of the bridge arm, and verifies the pre-charging process of the fault bridge arm by simulation software. Finally, a batch non-invasive fault detection method for M3C converter is proposed by using the control system arm current and sub-module capacitor voltage sensors.
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关键词
M3C,failure analysis,batch inspection,nonintrusive
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