LOW VOLTAGE APPARATUS ›› 2021, Vol. 0 ›› Issue (10): 42-47.doi: 10.16628/j.cnki.2095-8188.2021.10.007

• Electrical Design & Discussion • Previous Articles     Next Articles

Simulation and Experimental Research on Current Injection DC Circuit Breaker

CHEN Lingling1, WANG Kun2, ZHOU Chunlong1   

  1. 1. Shanghai Electrical Apparatus Research Institute (Group) Co.,Ltd.,Shanghai 200063,China
    2. Military Representative Office in the 426 Shipyard,Dalian 116005,China
  • Received:2021-06-11 Online:2021-10-30 Published:2022-01-25

Abstract:

In order to solve the rated breaking current impact and long breaking time of small current of the conventional current injection type DC circuit breaker,IGCT branch is connected in parallel at both ends of the current injection DC circuit breaker to achieve rated current breaking,and through forced commutation to achieve short-circuit current breaking.Aiming at the secondary zero-crossing phenomenon of the fast vacuum switch during the 60 kA short circuit breaking process,the influence of the zero-crossing rate of the arcing current and the distance at the zero-crossing time of the fast vacuum switch on the zero-crossing cut-off is analyzed,on this basis,improvement measures are proposed.The effectiveness of the measures and the feasibility of practical application are verified through simulation and experiments.

Key words: current injection type DC circuit breaker, fast vacuum switch, zero rest time, zero crossing rate, open distance

CLC Number: