期刊
IEEE TRANSACTIONS ON POWER ELECTRONICS
卷 37, 期 7, 页码 7548-7554出版社
IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC
DOI: 10.1109/TPEL.2022.3146249
关键词
Voltage; Circuit faults; Fault tolerant systems; Fault tolerance; Voltage control; Matrix converters; Voltage measurement; Adaptive optimum common-mode voltage (CMV); fault-tolerant control; modular multilevel matrix converter (M3C); submodule (SM) fault
资金
- National Natural Science Foundation ofChina [51777110]
In this letter, an optimum common-mode voltage injection (CMV) method is proposed to maximize the input and output voltage ranges of the M3C after nonredundant SMs are failed. The injected optimum CMV is calculated in real-time and can adapt to different load and fault conditions. Experimental results validate the effectiveness of the proposed method.
The modular multilevel matrix converter (M3C) is an attractive topology for high-voltage and high-power direct ac-to-ac power conversion applications. SM fault-tolerant control is of great importance for the M3C. This letter proposes an optimum common-mode voltage injection (CMV) method which can maximize the input and output voltage ranges of the M3C after nonredundant submodules (SMs) are failed. The injected optimum CMV is calculated in real-time according to the relationship between the fundamental reference voltage and maximum available voltage of each branch, which can be adaptive to different load and fault conditions. The operating area of the M3C after the fault when employingthis method is also discussed. Experimental results implemented on an M3C prototype with three SMs in each branch are presented to validate the proposed method and analysis.
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