水电站照明变低压侧零序CT安装位置对于接地保护的影响分析  

Influence of Installation Position of Zero Sequence CT at Low Voltage Side of Lighting Transformer in Hydropower Station on Grounding Protection

作　　者：何能全 

机构地区：[1]雅砻江流域水电开发有限责任公司,成都610000

出　　处：《日用电器》2022年第5期76-79,共4页ELECTRICAL APPLIANCES

摘　　要：本文对某大型水电站TT系统厂用照明变低压侧接地故障时的电流回路进行理论和案例分析,给出了变压器低压侧零序CT的合理安装位置建议,以保证在各种运行工况及变压器低压侧发生接地故障时,接地保护能正确动作。This paper makes a theoretical and case analysis on the current circuit in case of grounding fault on the low-voltage side of TT system auxiliary lighting transformer in a large hydropower station,and gives suggestions on the reasonable installation position of zero sequence CT on the low-voltage side of transformer,so as to ensure that in various operating conditions and grounding fault on the low-voltage side of transformer,the grounding protection can operate correctly.

关 键 词：照明变 零序CT 接地保护 安装位置 

分 类 号：TM862[电气工程—高电压与绝缘技术] TV73[水利工程—水利水电工程]