东北电力技术2025，Vol.46Issue(1)：17-20,24,5.
一起套管故障引起的500 kV变压器跳闸事故分析
Analysis on 500 kV Auto-Transformer Tripping Accident Caused by Bushing Fault
张旭 1邳浚哲1
作者信息
- 1. 国网河北省电力有限公司超高压分公司,河北 石家庄 050051
- 折叠
摘要
Abstract
In view of the tripping accident of the auto-transformer three side caused by the bushing fault on the medium voltage side of an auto-transformer in a 500 kV substation,the correctness of each protection action related to this accident is evaluated in combination with the protection tripping report and fault recording files.Compare with the phase of each TA current,it calculates the differential current and braking current,analyzes and determine that the fault point is located in the bushing at the medium voltage side and the development process of the bushing fault point,and the reasons for the non action of the side differential protection are analyzed and described in detail.It provides relevant technicians with the analysis experience of the protection action of the near fault at the medium voltage side of the auto-transformer,and improves the power grid operation management level.关键词
跳闸分析/分侧差动保护/自耦变压器Key words
trip analysis/side differential protection/auto-transformer分类
信息技术与安全科学引用本文复制引用
张旭,邳浚哲..一起套管故障引起的500 kV变压器跳闸事故分析[J].东北电力技术,2025,46(1):17-20,24,5.
