35 kV集电线路单相接地故障扩大至接地变压器保护越级动作的事件分析  

ANALYSIS OF GROUND TRANSFORMER PROTECTION OVERRIDE ACTION CAUSED BY 35 KV COLLECTING LINE SINGLE PHASE GROUND FAULT

作　　者：张庆波 王宇 腾依海 潘冬慧[2] Zhang Qingbo;Wang Yu;Teng Yihai;Pan Donghui(Jilin Longyuan Wind Power Co.,Ltd.,Changchun 130022,China;Jilin Jianzhu University,Changchun 130118,China)

机构地区：[1]吉林龙源风力发电有限公司,长春130022 [2]吉林建筑大学,长春130118

出　　处：《太阳能》2020年第12期62-65,共4页Solar Energy

摘　　要：通过对35 kV集电线路单相接地故障扩大至接地变压器保护越级动作事件进行分析,阐明了35 kV出线的电缆外铠接地发生错误时,会对零序电流保护产生拒动的影响,采用调整电缆及零序CT相对位置的方法,解决了零序电流保护拒动的问题,可为35 kV零序电流保护越级跳闸的快速处理提供参考。By analysis a ground transformer protection override action caused by of 35 kV collecting line single phase ground fault,it is clarified that when the 35 kV outgoing cable outer armor is grounded incorrectly,the zero sequence current protection will cause the failure to operate.By adjusting the relative positions of cables and zero sequence CT,the problem of zero sequence current protection can be solved,and it can provide a reference for the quick handling of 35 kV zero sequence current protection.

关 键 词：零序电流 接地变压器 单相接地 故障 

分 类 号：TK513.5[动力工程及工程热物理—热能工程]