Development of transformer buckup protection based on negative sequence current

XIANG Wei; LI Eying; ZHONG Zhong; LUO Weicheng

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Development of transformer buckup protection based on negative sequence current

更新时间：2025-11-18

- Development of transformer buckup protection based on negative sequence current
- Vol. 36, Issue 6, Pages: 72-75+78(2016)
- 作者机构：
  
  1. 国网湖南省电力公司株洲供电分公司
  2. 国网湖南省电力公司电力科学研究院
- 作者简介：
- 基金信息：
- DOI：
  CLC： TM774
- Published：2016
- 稿件说明：
移动端阅览
[1]向为,李娥英,钟忠,罗伟成.基于负序电流原理的变压器低后备保护的改进[J].湖南电力,2016,36(06):72-75+78.

XIANG Wei, LI Eying, ZHONG Zhong, et al. Development of transformer buckup protection based on negative sequence current[J]. 2016, 36(6): 72-75+78.
[1]向为,李娥英,钟忠,罗伟成.基于负序电流原理的变压器低后备保护的改进[J].湖南电力,2016,36(06):72-75+78. DOI：

XIANG Wei, LI Eying, ZHONG Zhong, et al. Development of transformer buckup protection based on negative sequence current[J]. 2016, 36(6): 72-75+78. DOI：

摘要

变压器后备过流保护主要以变压器的额定电流来设置

在作为出线末端两相金属性短路的远后备时

存在灵敏度不足问题。本文基于系统不对称故障序分量特征分析

提出了变压器的负序过流保护

提高了变压器过流保护反应于出线不对称故障的灵敏度。

Abstract

The transformer over-current backup protection is configured mainly according to transformer’s rated current

but as far backup protection for two-phase short-circuit at line end

it’s sensitivity can’t meet the requirements of setting code usually.Based on analyzing the sequence component characteristics of power system unbalanced faults

this paper presents transformer’s negative sequence current protection to improve the sensitivity to the line’s unbalanced faults.

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