主变低压侧接地保护功能完善及现场应用分析  

Improvement of Grounding Protection Function at Low Voltage Side of Main Transformer and Field Application Analysis

作　　者：陈强 曹钢 Chen Qiang;Cao Gang

机构地区：[1]雅砻江流域水电开发有限公司,四川成都610000

出　　处：《电力系统装备》2022年第8期58-60,共3页Electric Power System Equipment

摘　　要：针对发电机变压器单元接线方式且发电机与变压器之间的带出口断路器,探讨主变低压侧出现永久故障点、主变低压侧接地保护无跳闸功能时发生无法快速切除故障的问题,提出解决思路并进行现场实际应用分析。Aiming at the wiring mode of generator transformer unit and the outlet circuit breaker between generator and transformer,this paper discusses the problem that the permanent fault point occurs on the low-voltage side of main transformer and the fault cannot be removed quickly when the grounding protection on the low-voltage side of main transformer has no tripping function,and puts forward the solution and field practical application analysis.

关 键 词：主变低压侧接地保护 GCB辅助接点 PT断线 辅助判据 

分 类 号：TM862[电气工程—高电压与绝缘技术]