东北电力技术2025，Vol.46Issue(2)：31-33,3.
基于励磁涌流对零序差动极性分析的应用
Application of Zero Sequence Differential Polarity Analysis Based on Excitation Inrush Current
李琛1
作者信息
- 1. 辽宁东科电力有限公司,辽宁 沈阳 110179
- 折叠
摘要
Abstract
Single-phase grounding short-circuit is one of the main fault forms of 220～500 kV transformers.Compared with the phase-to-phase differential protection,the zero sequence differential protection has higher sensitivity to the single-phase grounding fault that occurs inside the transformer.Therefore,how to accurately check the polarity of the zero sequence current transformer gradually be-comes the focus of on-site engineers.Taking an overseas project as an example,it analyzes in detail the application process of chec-king the zero sequence differential protection through excitation inrush current,and provides a guiding basis for judging the polarity of zero sequence differential protection on site.关键词
海外工程/励磁涌流/零序差动保护/极性校验Key words
overseas projects/excitation inrush current/zero sequence differential protection/polarity check分类
动力与电气工程引用本文复制引用
李琛..基于励磁涌流对零序差动极性分析的应用[J].东北电力技术,2025,46(2):31-33,3.
