电弧对发电机断路器电源侧短路电流开断能力的影响分析  

Influence of Arc on Interrupting Capability of Generator-source Short-circuit Current for Generator Circuit-breaker

作　　者：成勇[1] 张文兵[1] 马占峰[1] 刘景博[1] 严旭[1] 赵培[1] 

机构地区：[1]西安高压电器研究院有限责任公司,西安710077

出　　处：《高压电器》2013年第8期119-124,共6页High Voltage Apparatus

摘　　要：发电机断路器电源侧短路电流具有较大的非对称度,在特殊工况下,甚至会出现电流延迟过零的现象。笔者结合实际工程中的发电机参数,计算了考虑电弧前后发电机断路器电源侧短路电流的变化,阐述了电源侧短路电流出现延迟过零的原因,分析了电弧对电源侧预期短路电流的影响。对比发电机断路器电源侧预期短路电流计算结果和系统侧短路电流开断试验数据,分析了发电机断路器电源侧短路电流的开断能力,尤其是具有延迟电流零点短路电流的开断能力,其结果可作为确定发电机断路器电源侧短路电流开断能力的参考依据。Generator-source short-circuit current （GSC） exhibits high degree of asymmetry, which may lead to delayed current zero under special conditions. In this paper, based on generator parameters in practice, GSC waveforms of generator circuit-breaker（GCB） are calculated with and without the influence of arc, the reason why GSC appears delayed zero is discussed, and the influence of arc on predicting GSC is analyzed. Moreover, by comparing the calculation results of GSC with the interrupting waveform of system-source short-circuit current from test, the interrupting capability for GSC, especially GSC with delayed current zero, is analyzed. This study may provide a reference for determining the interrupting capability of GCB for GSC.

关 键 词：发电机断路器 电弧 电源侧短路电流 延迟过零 

分 类 号：TM561[电气工程—电器]