并联电容对发电机断路器暂态恢复电压TRV的影响研究  

Research of Shunt Capacitor Impact on Transient Recovery Voltage for Generator Circuit-breakers

作　　者：刘浩军[1] 赵福强 苏超 高享想[1] 李刚[1] 何冰[1] 张敏[1] 

机构地区：[1]西安高压电器研究院有限责任公司,西安710077 [2]国网临沂供电公司,山东临沂276000

出　　处：《高压电器》2017年第2期186-190,198,共6页High Voltage Apparatus

摘　　要：发电机断路器开断短路故障电流后,断口间的暂态恢复电压(TRV)具有上升率高、时延短和振幅系数大的特点。因此,电流过零开断后发电机断路器断口间将承受非常严酷的热应力,容易发生电弧复燃,从而导致短路故障开断失败。为此,笔者通过仿真计算与分析并联电容对发电机断路器开断系统源故障、失步故障后断口间TRV的影响,仿真结果表明并联电容可以有效地降低TRV的上升率RRRV。最后,通过额定电压24 kV、额定短路开断电流160 k A的发电机断路器(型号为ZHN10-24/Y25000-160)开断系统源故障、失步故障的数据结果说明了理论分析和实际结果相一致。After the generator circuit-breaker interrupting the short-circuit fault,the TRV across the interrupter have high rate of rise, short time delay and large amplitude factor. Therefore, the interrupter will withstand very severe thermal stress after current zero crossing and interruption,easy re-arcing,and cause breaking failure in short circuit fault. In this paper, with the simulating calculation and analyzing of the shunt capacitor impact on TRV for test duties T100 and OP,the results show that the rise rate of TRV（RRRV）can be reduced effectively by shunt capacitor. Finally, it is shown the interruption test results of generator circuit-breaker with a rated voltage 24 kV and rated short-circuit breaking current 160 kA（ZHN10-24/Y25000-160）.

关 键 词：发电机断路器 并联电容 TRV 

分 类 号：TM561[电气工程—电器]