LOW VOLTAGE APPARATUS ›› 2022, Vol. 0 ›› Issue (11): 39-45.doi: 10.16628/j.cnki.2095-8188.2022.11.007

• System Detection & Protection • Previous Articles     Next Articles

Research on Protection Devices for Short-Circuit Fault Current of DC Microgrid

ZANG Wei, LINGHU Shaojiang, GE Shiwei   

  1. Zhejiang Tianzheng Intelligent Electric Appliance Co.,Ltd., JiaXing 314000, China
  • Received:2022-05-23 Online:2022-11-30 Published:2023-01-04

Abstract:

DC microgrid is attracting more attention due to its high efficiency and integrating the distributed energy into public bus more easily.At the same time,the fault is more difficult to be eliminated when the short-circuit fault current occurs due to its own characteristics of DC system.Firstly,the characteristics of short-circuit fault current of DC microgrid are analyzed.According to the characteristics of short-circuit fault current,the latest research progress of four main protection devices of DC microgrid:fuse,mechanical DC circuit breaker,solid-state circuit breaker and hybrid DC circuit breaker is summarized.The characteristics of various protective devices,the existing problems and the solutions proposed by experts and scholars to deal with these problems are emphatically analyzed.

Key words: DC microgrid, short-circuit fault current, fuse, mechanical DC circuit breaker, solid-state circuit breaker, hybrid DC circuit breaker

CLC Number: