Fault Analysis on 35 kV Capacitor Bank at 500 kV Substation

HU Hong-yu; LIU Jun-nong

doi:10.14044/j.1674-1757.pcrpc.2013.02.016

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Fault Analysis on 35 kV Capacitor Bank at 500 kV Substation

更新时间：2024-09-14

- Fault Analysis on 35 kV Capacitor Bank at 500 kV Substation
- POWER CAPACITOR & REACTIVE POWER COMPENSATION Vol. 34, Issue 2, Pages: 68-71(2013)
- 作者机构：
  
  江西省电力公司检修分公司
- 作者简介：
- 基金信息：
- DOI：10.14044/j.1674-1757.pcrpc.2013.02.016
  CLC： TM53
- Published：2013，
- 稿件说明：
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[1]胡宏宇,刘军农.一起500kV变电站35kV电容器组故障分析[J].电力电容器与无功补偿,2013,34(02):68-71.

HU HONG-YU, LIU JUN-NONG. Fault Analysis on 35 kV Capacitor Bank at 500 kV Substation. [J]. Power capacitor & reactive power compensation, 2013, 34(2): 68-71.
[1]胡宏宇,刘军农.一起500kV变电站35kV电容器组故障分析[J].电力电容器与无功补偿,2013,34(02):68-71. DOI： 10.14044/j.1674-1757.pcrpc.2013.02.016.

HU HONG-YU, LIU JUN-NONG. Fault Analysis on 35 kV Capacitor Bank at 500 kV Substation. [J]. Power capacitor & reactive power compensation, 2013, 34(2): 68-71. DOI： 10.14044/j.1674-1757.pcrpc.2013.02.016.

摘要

本文分析了一起500 kV变电站35 kV电容器组故障。首先通过测试背景谐波

排除了谐波放大可能导致电容器损坏的因素。然后根据内熔丝保护设置的机理和要求

发现电容器组的中性点不平衡电流保护整定值过大。所以进行了继电保护整定值的调整

从而确保电容器单元内部元件损坏在一个很小范围的情况下

继电保护就动作

杜绝类似严重故障的发生。对于带内熔丝的电容器组

一般情况是不需要安装外熔断器

因此拆除了电容器组外熔断器。

Abstract

In this paper

one fault of 35 kV capacitor bank at 500 kV substation is analyzed.Firstly

the factors possibly causing damage of capacitor such as harmonics amplification is eliminated through the test of background harmonics.Then

it is found that imbalance current protection settings at neutral point of capacitor bank are too high in accordance with the mechanism and requirement set by the internal fuse.The settings of replaying protection is adjusted

thus assuring relaying protection operation in case of small scope of damage to the internal elements of capacitor unit and preventing occurrence of similar serious faults.For the capacitor banks with internal fuse

installation of external fuse is in general unnecessary

and

therefore

the external fuse of capacitor bank is removed.

关键词

变电站电容器组故障分析谐波整定值

Keywords

substationcapacitorfault analysisharmonicssettings

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Related Institution

Qinhuangdao Electric Co.

秦皇岛电力公司河北秦皇岛066000

State Grid Jibei Electric Power Co., Ltd., Tangshan Power Supply Company

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Huazhong University of Science and Technology

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