一起220kV启备变铁心接地电流超标的原因分析及处理  

Analysis of Cause and Treatment of a 220kV Starter Transformer Core Grounding Current Exceeding Standard

作　　者：单银忠 谢竟成 王胜龙 王晨彤 SHAN Yin-zhong;XIE Jing-cheng;WANG Sheng-long;WANG Chen-tong(CHN ENERGY Science And Technology Research Institute Co.,Ltd.,Nanjing 210046,China)

机构地区：[1]国家能源集团科学技术研究院有限公司,江苏南京210046

出　　处：《变压器》2023年第2期69-71,共3页Transformer

摘　　要：本文对一台220kV启备变铁心接地电流超标的原因进行了分析及处理,通过变压器铁心接地电流、电气试验数据和变压器油色谱数据的分析,判断了变压器铁心存在多点接地故障,提出了限制铁心接地电流的措施及缩短色谱检测周期,建议做好变压器停机吊罩检查及处理的准备工作。This paper analyzes and deals with the causes of the core grounding current exceeding the standard of a 220kV starter transformer in a plant.Through the analysis of transformer core grounding current,electrical test data and transformer oil chromatography data,it is judged that there is a multi-point grounding fault in the transformer core,proposes measures to limit the core grounding current and shorten the chromatography test cycle,and suggest that the preparatory work of transformer shutdown,inspection and processing of hanging cover should be done.

关 键 词：启备变 铁心 多点接地 接地电流 油色谱 

分 类 号：TM406[电气工程—电器]