12 kV开关柜内部电弧故障两相试验研究与分析  

Research and Analysis of Two-Phase Arc Fault Test in 12 kV Switchgear

作　　者：胡丁尹[1] 宇文博 金庆滨 彭剑飞[1] 者永祥 李阳 冯伦 何冰[1] HU Dingyin;YU Wenbo;JIN Qingbin;PENG Jianfei;ZHE Yongxiang;LI Yang;FENG Lun;HE Bing(Xi’an High Voltage Apparatus Research Institute,Xi’an 710077,China)

机构地区：[1]西安高压电器研究院有限责任公司,陕西西安710077

出　　处：《电器与能效管理技术》2020年第9期72-78,共7页Electrical & Energy Management Technology

摘　　要：依据IEC 62271-200:2011或者GB/T 3906—2011标准,对12 kV开关柜进行内部电弧故障两相型式试验时,会出现两相故障发展为三相故障的异常情况,研究了典型试验案例,并通过仿真进行了分析。两相故障发展为三相故障时,电流会增大,引燃的第三相电流起始点对应的该相相电压相位具有不确定性,直接影响着该相最大电流峰值,分析出绝缘器件绝缘失效的原因,为开关柜的性能改进提供参考。According to IEC 62271-200 or GB/T 3906 standard,two-phase fault will develop into three-phase fault in 12 kV switchgear when conducting two-phase type test of internal arc fault,which mostly occurs in the initial stage and middle stage of flow passage.This paper studies and analyzes this situation through typical test cases,and further analyzes the development of two-phase fault into three-phase fault through simulation.The analysis shows that the current will increase when two-phase fault develops into three-phase fault,and the voltage phase of the phase corresponding to the starting point of the third-phase current ignited is uncertain,which directly affects the maximum current peak of the phase.The results show that the reason of insulation failure can be analyzed by the development of two-phase fault into three-phase fault,which provides a reference for the improvement of the performance of the switchgear.

关 键 词：内部电弧 两相故障 三相故障 相位 不确定性 电流峰值 

分 类 号：TM591.1[电气工程—电器]