The Influences of CT’S Neutral Circuit Abnormality on Relay Protection and Discussion on Its Test Method

李克昌

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The Influences of CT’S Neutral Circuit Abnormality on Relay Protection and Discussion on Its Test Method

更新时间：2025-11-18

- The Influences of CT’S Neutral Circuit Abnormality on Relay Protection and Discussion on Its Test Method
- Issue 2, Pages: 16-19(1996)
- 作者机构：
  
  湖南省电力试验研究所
- 作者简介：
- 基金信息：
- DOI：
  CLC： TM773
- Published：1996
- 稿件说明：
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[1]李克昌.C.T中性线回路异常对保护的影响及试验方法的讨论[J].湖南电力,1996(02):16-19.

李克昌. The Influences of CT’S Neutral Circuit Abnormality on Relay Protection and Discussion on Its Test Method[J]. 1996, (2): 16-19.
[1]李克昌.C.T中性线回路异常对保护的影响及试验方法的讨论[J].湖南电力,1996(02):16-19. DOI：

李克昌. The Influences of CT’S Neutral Circuit Abnormality on Relay Protection and Discussion on Its Test Method[J]. 1996, (2): 16-19. DOI：

摘要

从岗市变500kV岗云线C.T二次中性线开路

导致LZ96距离保护拒动和朗梨变毛朗线因C.T二次中性线异常导致相差高频在区外故障误动作的情况入手

分析其产生不正确动作的原因

探讨如何发现C.T二次中性线异常的办法

并介绍了在线路非全相运行中判别零序功率方向接线的正确性。

Abstract

This paper attempts to analyse the reason of misoperation of relay protection and to discuss the methods how to find out the CT’S neutral circuit abnormality

beginning with the nonoperation of LZ96 distance protection Located on Gang-Yun 500kV Line in Gang Shi Substation caused by the opening of the CT’S neutral circuit and the misoperation of the phase differential high frequency protection Located on Mao Lang 220kV Line in Lang Li Substation caused by the CT’S neutral circuit abnormality in the case of overreach-fault. "At the same time

also introduces how to discriminate the connecting correctness of second circuits of zero sequence directional protection using opening a pole.

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The Comprehensive Analysis of Misoperation of the High-frequency Protections and Their Precautions

Study on power system fault diagnosis

Related Author

曾家瑞

ZHANG Min

LIANG Yun-hua

Related Institution

湖南省电力调度通信局

Xiangtan Electric Power Bureau

湖南湘潭电业局湖南湘潭411104

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