【摘要】 本文通过理论分析阐明了吸能装置在直流开断过程中的重要作用,作为算例对葛-上线的直流开断过程进行了计算分析,求得当开断电流为4000A在线路末端发生故障时,流过吸能装置的电流波形为8.8ms的矩形波,要求吸收的能量为10.29MJ。通过试验研究得出阀片在不同时间长度电流波形作用下的通流能力可以按照能量相等原则来进行换算。更多还原

【Abstract】 Energy absorber is an important component in HVDC CB.The analyses and cal- culations of the interruption process of the Gezhouba-Shanghai HVDC transmission line have been made, when interrupting current is 4000A, ground fault occurs at 1000 km far from the converter station, the dissipated energy in the absorber is 10.29MJ and the current duration is 8.8ms. In this paper the ZnO varistors were tested by the rectangular current with dura- tion 10ms.The capability of the ZnO varistors to carry current for 10ms is fairly high.For comparison the ZnO varistors were also tested by the rectangular current with shorter duration 2 ms.更多还原