基于CDEGS试验站接地网地电位升的研究  

Study on Ground Potential Rise of Ground Grid Based on CDEGS Test Station

作　　者：胡丁尹[1] 李阳 陈小柯[1] 宇文博 何冰[1] HU Dingyin;LI Yang;CHEN Xiaoke;YU Wenbo;HE Bing(Xi’an High Voltage Apparatus Research Institute Co.,Ltd.,Xi’an 710077,China)

机构地区：[1]西安高压电器研究院有限责任公司

出　　处：《电器与能效管理技术》2019年第14期21-26,共6页Electrical & Energy Management Technology

摘　　要：试验站在进行接通与分断能力试验时,当电器出线端三相短接并接地时,三相负载如果出现不对称,短接点会有电流通过接地点注入接地网中;当电器的接地部件通过熔断元件与接地点连接,在出现故障电流时也会有电流通过接地点注入接地网中。这两种情况都会使试验站接地网出现地电位升。地电位升具有一定危害,会引起地电位反击,破坏地电位范围内的电子及金属设备。针对以上情况,对试验站接地网进行了不同电流在接地网中心、边角注入时的地电位升研究分析。When the test station conducts the connection and interruption ability test,when the three-phase short connection of the outlet end of the electrical appliance is grounded,if the three-phase load is asymmetrical,the short contact will have current injected into the grounding grid through the grounding point.When the grounding component of the electrical appliance is connected to the grounding point through the fuse element,there will also be current injected into the grounding grid through the grounding point when the fault current occurs.Both of the conditions will make the ground potential rise in the grounding grid of the test station.The ground potential rise is harmful to some extent.It will cause ground potential counterattack and destroy electronic and metal equipment in the range of ground potential.Therefore,in view of the above situation,the ground potential rise of the grounding grid of the test station is studied and analyzed when different currents are injected into the center and corner of the grounding grid.

关 键 词：三相负载 短接点 接地点 接地网 地电位升 

分 类 号：TM862[电气工程—高电压与绝缘技术]