选相合闸对短路电流参数的影响及其在容量试验中的应用  

Influence of Phase-selection Switching on the Short-circuit Current Parameters and Its Application in Short-circuit Tests

作　　者：赵庆斌[1] 黄实[1] 樊楚夫[1] 苏宇红[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》2015年第9期164-168,176,共6页High Voltage Apparatus

摘　　要：选相合闸可改变短路电流的直流分量。文中计算了在不同相位合闸时短路电流的峰值,分析了非对称电流零点及峰值时刻的变化趋势,公式推导了三相不同期合闸时获得最大冲击系数时三相的合闸相位,计算了在不同的极间同期条件下电流的最大峰值系数。结果表明三相同期性对关合电流峰值有一定影响,容量试验可利用这些特点调整电流参数。Phase-selection switching will change the direct component of short-circuit current. In this paper, the peak current for switching at different phase angles is calculated, and the variation trend of time at zero and peak of asymmetric current is analyzed. The angles of three phases for obtaining maximum current shock coefficient are derived in the case of non-simultaneous three-phase switching, and the peak current coefficient in different poles simultaneity conditions is calculated as well. It is concluded that the simultaneity of three phases exerts a certain influence on peak current of phase-selection switching, and this feature can be ant）lied to short-circuit tests in order to obtain suitable current parameters.

关 键 词：选相合闸 容量试验 短路电流 同期合闸 

分 类 号：TM561[电气工程—电器]