Analysis of coordination relationship between circuit breaker flashover protection and dynamic stability of transformer

YANG Bo; WU Yiyang; WANG Jiaju

doi:10.19666/j.rlfd.202005215

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Analysis of coordination relationship between circuit breaker flashover protection and dynamic stability of transformer

更新时间：2025-09-28

- Analysis of coordination relationship between circuit breaker flashover protection and dynamic stability of transformer
- Thermal Power Generation Vol. 50, Issue 3, Pages: 172-175(2021)
- 作者机构：
  
  西安热工研究院有限公司
- 作者简介：
- 基金信息：
- DOI：10.19666/j.rlfd.202005215
  CLC： TM774
- Published Online：22 February 2021，
  
  Published：2021
- 稿件说明：
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YANG Bo, WU Yiyang, WANG Jiaju. Analysis of coordination relationship between circuit breaker flashover protection and dynamic stability of transformer[J]. Thermal power generation, 2021, 50(3): 172-175.
DOI：

YANG Bo, WU Yiyang, WANG Jiaju. Analysis of coordination relationship between circuit breaker flashover protection and dynamic stability of transformer[J]. Thermal power generation, 2021, 50(3): 172-175. DOI： 10.19666/j.rlfd.202005215.

摘要

本文针对电厂断路器闪络导致主变压器损坏的实例

分析在磁场断路器断开瞬间

发电机励磁回路的暂态过电压对发电机端电压的影响

以及和断口闪络保护和失灵保护的总时限与变压器动稳定能力之间的配合关系

认为目前标准规定的断路器闪络保护与失灵保护配合不能有效地保护主变压器。根据分析结果

提出对现有装置缩短断路器闪络与失灵保护时限;或通过改变断路器闪络保护的出口方式

使其直接动作于故障断路器的所有相邻的断路器或所在母线所有断路器。

Abstract

Against the example of main transformer damage caused by circuit breaker flashover in power plant

this paper analyzes the influence of transient overvoltage of generator excitation circuit on generator terminal voltage at the moment of field circuit breaker disconnection

and analyzes the coordination relationship between the total time limit of fault flashover protection and fault protection and the dynamic stability capability of transformer. It is considered that the coordination of flashover protection and failure protection of circuit breaker specified in the current standard can not effectively protect the main transformer. According to the analysis results

this paper proposes to shorten the time limit of circuit breaker flashover and failure protection for existing devices

or change the outlet mode of circuit breaker flashover protection

so that it can directly act on all adjacent circuit breakers of fault circuit breaker or all circuit breakers of the bus.

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Related Author

YU Zhen-huaShanghai Waigaoqiao Second Power Generation Co Ltd

LUO JianState-level Key Laboratory of Power Transmission and Distribution Equipments as well as System Safety and New Technology

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CHEN Feng

CHENG Yang

MA Hongshun

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Related Institution

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