Journal of Power Electronics

The Korean Institute of Power Electronics (전력전자학회)
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Hybrid DC circuit breaker with reduced fault isolation time and current limiting capability

  • Qichao Chen (State Grid Economic and Technological Research Institute Co., Ltd) ;
  • Bingkun Li (College of Mechanical and Electrical Engineering, Northeast Forestry University) ;
  • Laicheng Yin (College of Mechanical and Electrical Engineering, Northeast Forestry University) ;
  • Junyuan Zheng (College of Mechanical and Electrical Engineering, Northeast Forestry University) ;
  • Zhaoyu Duan (College of Mechanical and Electrical Engineering, Northeast Forestry University) ;
  • Yiqi Liu (College of Mechanical and Electrical Engineering, Northeast Forestry University)
  • Received : 2023.04.18
  • Accepted : 2023.08.10
  • Published : 2024.01.20
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Abstract

DC circuit breakers (DCCBs) are key pieces of equipment to ensure the safe and stable operation of DC grids. However, current DCCB schemes generally have problems such as a slow fault clearing speed and a poor current limiting effect. This paper proposes a current-limited hybrid DC circuit breaker (CLHCB) that limits fault current and has fast fault isolation, which reduces the capacity requirements. The current limiting inductor in the fault current limiter (FCL) provides the current limiting capability. In addition, the energy dissipation circuit (EDC) is in parallel to reduce the energy dissipation in metal oxide arresters (MOAs) and to decrease the fault isolation time (FIT), which can reduce the thermal effects of MOAs and improve their reliability. Simulation results verify the working principle and advantages of the proposed CLHCB. When compared to an ABB HCB under the same simulation parameters, the CLHCB enables fault current limiting and faster fault isolation. Finally, experiments have verified the effectiveness of the proposed CLHCB.

Keywords

Acknowledgement

This work was supported in part by the National Natural Science Foundation of China (52277171).

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