杂散电感对混合式限流直流断路器影响的分析

Analysis of the Influence of Stray Inductance on Hybrid Current-limited DC Breaker

为研究杂散电感对混合式限流直流断路器的影响,从强迫换流回路杂散电感、强迫换流回路与主回路之间杂散电感,以及限压吸能回路杂散电感三方面进行仿真分析。分析表明,强迫换流回路与限压吸能回路杂散电感对混合式限流直流断路器的影响较小,而强迫换流回路与主回路之间的杂散电感对混合式限流直流断路器的短路电流分断能力有重要影响。

In order to study the influence of stray inductance on the hybrid current-limited DC breaker, the simulation and analysis was carried out from three aspects： stray inductance of forced commutation loop, stray inductance between forced commutation loop and main loop, and stray inductance of voltageqimited absorption loop. The analysis shows that the influence of the stray inductance in forced commutation loop and the voltage-limited energy absorbing loop on the hybrid current-limited DC breaker is small, the stray inductance between the forced commutation loop and the main loop has an important influence on the short circuit current breaking capacity of the hybrid current-limited DC breaker, which affects whether the commutation can be successful.