Fault Analysis on Secondary Voltage Waveform Distribution of 220 kV CVT

LIU Jiping; WEI Jufang; XI Xiaoguang; ZHANG Chi; WANG Wei

doi:10.14044/j.1674-1757.pcrpc.2020.02.013

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Fault Analysis on Secondary Voltage Waveform Distribution of 220 kV CVT

更新时间：2024-09-14

- Fault Analysis on Secondary Voltage Waveform Distribution of 220 kV CVT
- POWER CAPACITOR & REACTIVE POWER COMPENSATION Vol. 41, Issue 2, Pages: 70-73(2020)
- 作者机构：
  
  国网天津市电力公司电力科学研究院
- 作者简介：
- 基金信息：
- DOI：10.14044/j.1674-1757.pcrpc.2020.02.013
  CLC： TM451
- Published：2020，
- 稿件说明：
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[1]刘继平,魏菊芳,郗晓光,张弛,王伟.一起220 kV CVT二次电压波形畸变的故障分析[J].电力电容器与无功补偿,2020,41(02):70-73+79.

LIU JIPING, WEI JUFANG, XI XIAOGUANG, et al. Fault Analysis on Secondary Voltage Waveform Distribution of 220 kV CVT. [J]. Power capacitor & reactive power compensation, 2020, 41(2): 70-73.
[1]刘继平,魏菊芳,郗晓光,张弛,王伟.一起220 kV CVT二次电压波形畸变的故障分析[J].电力电容器与无功补偿,2020,41(02):70-73+79. DOI： 10.14044/j.1674-1757.pcrpc.2020.02.013.

LIU JIPING, WEI JUFANG, XI XIAOGUANG, et al. Fault Analysis on Secondary Voltage Waveform Distribution of 220 kV CVT. [J]. Power capacitor & reactive power compensation, 2020, 41(2): 70-73. DOI： 10.14044/j.1674-1757.pcrpc.2020.02.013.

摘要

电容式电压互感器运行可靠性直接关系到电网安全

由于其设计、结构等原因

电容式电压互感器电磁单元内部空间及各元件间的绝缘距离相对较小

且运行过程中

经常要承受电网的过电压

运行工况较差

极易发生故障。针对一起220 kV电容式电压互感器运行中二次电压波形畸变的故障

根据其结构特点

结合现场试验

初步判断故障原因为电容式电压互感器中间变压器一次绕组并联避雷器损坏

通过对故障电容式电压互感器的解体检查及避雷器试验

证实了该判断

通过对同类型电容式电压互感器的普查

提出了对此类故障的预防及处理措施。

Abstract

The operation reliability of capacitor voltage transformer is directly related to grid safety.The internal space of electromagnetic unit of the capacitor voltage transformer and the insulation between each element is relatively small due to design and structure of the voltage transformer

and it normally withstands grid overvoltage

the operation condition is weak and fault is easy to happen.In view of the fault of secondary voltage waveform distortion of 220 kV capacitor voltage transformer during the operation period

the reason of the fault is judged preliminarily to be the damage of shunt arrester of primary winding of the capacitor voltage transformer in accordance with its structure feature with combination of site test.The judgment is verified throughout the disassembly inspection and the test of arrester.The precautions and treatment measures for the similar fault are proposed through the fault survey of the similar capacitor voltage transformer.

关键词

电容式电压互感器（CVT）电压波形畸变避雷器故障分析

Keywords

capacitor voltage transformer（CVT）secondary voltage waveform distortionarresterfault analysis

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