一起35kV"Z"形接地变零序保护误动事故的分析
Analysis of a 35kV"Z"Type Grounding Transformer Zero Sequence Protection Misoperation Accident
韩忠华 1何伟忠 1蒋家富 1陈侃 1夏正亚1
作者信息
- 1. 国网上海市电力公司奉贤供电公司,上海 201400
- 折叠
摘要
阐述Z形接地模式的原理,针对110kV变电站的35kV出线单相接地故障案例,分析导致接地变零序保护误动的原因,提出处理方案及建议,包括修改接地变保护整定值、微机保护软件消零.
Abstract
This paper describes the principle of Z-type grounding mode,analyzes the causes of zero sequence protection misoperation in the grounding transformer for a single-phase grounding fault case of 35kV outgoing line in a 110kV substation,and proposes solutions and suggestions,including modifying the grounding transformer protection setting value and using microcomputer protection software for zero elimination.
关键词
接地模式/保护消零/误动作Key words
grounding mode/zero protection/misoperation引用本文复制引用
出版年
2024
NETL
NSTL
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