Journal of Power Electronics

The Korean Institute of Power Electronics (전력전자학회)
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Capacitors Energy Strategy Based Cascaded H-Bridge Converter for DC Port Failures

  • Peng, Xu (Aviation Engineering Institute, Civil Aviation Flight University of China) ;
  • Liu, Xiaohan (Aviation Engineering Institute, Civil Aviation Flight University of China) ;
  • Yang, Guolong (Aviation Engineering Institute, Civil Aviation Flight University of China) ;
  • Liu, Xijun (Aviation Engineering Institute, Civil Aviation Flight University of China) ;
  • Gao, Lixia (Aviation Engineering Institute, Civil Aviation Flight University of China) ;
  • Zhu, Xinyu (Aviation Engineering Institute, Civil Aviation Flight University of China)
  • Received : 2019.01.22
  • Accepted : 2019.04.30
  • Published : 2019.09.20
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Abstract

In this paper, a capacitors energy strategy based Cascaded H-bridge Converter (CHBC) for steady DC link voltage is proposed, which allow the CHBC to work while DC power fails. The topology of the CHBC is analyzed to construct the proposed strategy. The capacitors energy strategy is deduced based on the principle that the DC link voltage should be steady, the switch state should be smooth and the switch frequency should be normal. Experiments based on a three-module prototype, including static experiment, start experiment and step change experiment, proves the correctness of the strategy. They also verified the excellent fault tolerance ability and good dynamic performance of the proposed strategy.

Keywords

References

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