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| Fault Tolerant Operation Strategy of Seven-Level Active Neutral-Point-Clamped Inverter |
| Sheng Weihui1,2, Ge Qiongxuan1,3 |
1. Key Laboratory of Power Electronics and Electric Drive Chinese Academy of Sciences Beijing 100190 China;
2. University of Chinese Academy of Sciences Beijing 100049 China;
3. Institute of Electrical Engineering Chinese Academy of Sciences Beijing 100190 China |
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Abstract This paper analyzed operation characteristics of seven-level active neutral-point- clamped (ANPC-7L) converter under single-phase and multi-phase faults caused by switch short-circuit failure and open-circuit failure, and found out all the single-phase and multi-phase faults under which the converter can still be operational. This paper proposed a unified modulation strategy for various faults, and discussed the neutral-point potential balancing problem of ANPC-7L converter under various fault conditions. The proposed fault tolerant operation strategy is verified by the results from a 380V/5kW ANPC-7L converter.
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Received: 16 March 2018
Published: 29 January 2019
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2019, Vol. 34 
