1. Experimental Study on the Influence of Different Opening Speed on Post-Arc Current in DCCB
- Author
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Yi Wu, Chunping Niu, Fei Yang, Fengfeng Jiang, and Hao Sun
- Subjects
Materials science ,business.industry ,020209 energy ,Electrical engineering ,02 engineering and technology ,01 natural sciences ,Measuring equipment ,Cathode ,010305 fluids & plasmas ,law.invention ,Arc (geometry) ,Capacitor ,law ,Obstacle ,0103 physical sciences ,0202 electrical engineering, electronic engineering, information engineering ,Peak value ,Current (fluid) ,business ,Circuit breaker - Abstract
The pre-charged capacitor method, used in the active current injection circuit breaker in DC system, is an effective approach to realize the current injection. However, in practical applications, the performances of post-arc among different opening speed are still unknown, which have been an obstacle that blocks the design of MV DCCB. To solve this problem, high resolution measuring equipment was used to investigate the performances of vacuum circuit breaker in post-arc period. The experimental results show that the peak value of the post-arc current can be up to 6A and the post-arc current decays to zero within 10μs after current-zero. Besides, with the increase of opening speed, the fluctuation of post-arc charge increases continuously, while the average remains basically unchanged.
- Published
- 2019
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