Analysis on Connection Error in Current Transformer Secondary Circuit of 500 kV Tank Circuit Breaker with Countermeasures

YANG Zhong-li; NIU Yuan-tai; WU Zheng; REN Ping-li

doi:10.13296/j.1001-1609.hva.2012.08.019

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Analysis on Connection Error in Current Transformer Secondary Circuit of 500 kV Tank Circuit Breaker with Countermeasures

更新时间：2025-04-26

- Analysis on Connection Error in Current Transformer Secondary Circuit of 500 kV Tank Circuit Breaker with Countermeasures
- High VoltageApparatus Vol. 48, Issue 8, Pages: 94-98(2012)
- 作者机构：
  
  新乡供电公司
- 作者简介：
- 基金信息：
- DOI：10.13296/j.1001-1609.hva.2012.08.019
  CLC： TM452
- Published：2012
- 稿件说明：
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[1]杨忠礼,牛元泰,吴征,任平力.500kV罐式断路器电流互感器二次回路接线错误的分析及对策[J].高压电器,2012,48(08):94-98.

YANG Zhong-li, NIU Yuan-tai, WU Zheng, et al. Analysis on Connection Error in Current Transformer Secondary Circuit of 500 kV Tank Circuit Breaker with Countermeasures[J]. High voltageapparatus, 2012, 48(8): 94-98.
[1]杨忠礼,牛元泰,吴征,任平力.500kV罐式断路器电流互感器二次回路接线错误的分析及对策[J].高压电器,2012,48(08):94-98. DOI： 10.13296/j.1001-1609.hva.2012.08.019.

YANG Zhong-li, NIU Yuan-tai, WU Zheng, et al. Analysis on Connection Error in Current Transformer Secondary Circuit of 500 kV Tank Circuit Breaker with Countermeasures[J]. High voltageapparatus, 2012, 48(8): 94-98. DOI： 10.13296/j.1001-1609.hva.2012.08.019.

摘要

介绍了一起因500 kV罐式断路器电流互感器二次回路接线错误而产生的重大隐患

当500 kV罐式断路器本体发生故障时

由于线路保护与母线保护使用的电流互感器绕组接线未实现交叉

使得两者的保护范围没有交叉

存在保护死区

从而会导致主保护拒动。通过对全站500 kV系统保护用电流互感器绕组接线的检查和分析

发现造成保护死区主要是设计和安装两方面的原因

针对这两方面原因

提出了加强规范管理

在设计施工阶段加强一二次施工人员的配合以及施工、验收和日常维护时注重对该部分的检查等一系列具体的反事故措施

为今后罐式断路器继电保护用电流互感器绕组的设计、安装调试以及现场验收及维护提供了借鉴。

Abstract

A hidden danger owing to connection error in the current transformer secondary circuit of 500 kV tank circuit breaker is introduced.When the 500 kV tank circuit breaker went wrong

the main protections did not trip to clear the fault because current transformer windings for respective line protection and bus protection had not been cross-connected hence two protection ranges did not overlapped and main protection did not work.The protection dead zone is found to be due to some problems in both design and installation of the current transformer through checking and analyzing the current transformer winding.Consequently

some countermeasures for avoiding the protection dead zone are suggested

such as strengthening cooperation between primary and secondary builders during design and installation stage

and paying more attention to examinations in construction

acceptance and daily maintenance stages.

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Related Author

LI Feng

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Xi’an Shiky High Voltage Electric Co.,Ltd.

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