Analysis and Treatment on Higher Secondary Voltage of One 220kV CVT

LIU Sheng-jun; HUO Chun-yan; HE Yan; YANG Yu-xia; LIU Tao; LI Wen-feng

doi:10.14044/j.1674-1757.pcrpc.2013.04.015

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Analysis and Treatment on Higher Secondary Voltage of One 220kV CVT

更新时间：2024-09-14

- Analysis and Treatment on Higher Secondary Voltage of One 220kV CVT
- POWER CAPACITOR & REACTIVE POWER COMPENSATION Vol. 34, Issue 4, Pages: 69-74(2013)
- 作者机构：
  
  1. 保定供电公司
  2. 河北超高压分公司
- 作者简介：
- 基金信息：
- DOI：10.14044/j.1674-1757.pcrpc.2013.04.015
  CLC： TM714.2
- Published：2013，
- 稿件说明：
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[1]刘胜军,霍春燕,何燕,杨玉霞,刘涛,李文峰.一起220kV CVT二次电压偏高的分析处理[J].电力电容器与无功补偿,2013,34(04):69-74.

LIU SHENG-JUN, HUO CHUN-YAN, HE YAN, et al. Analysis and Treatment on Higher Secondary Voltage of One 220kV CVT. [J]. Power capacitor & reactive power compensation, 2013, 34(4): 69-74.
[1]刘胜军,霍春燕,何燕,杨玉霞,刘涛,李文峰.一起220kV CVT二次电压偏高的分析处理[J].电力电容器与无功补偿,2013,34(04):69-74. DOI： 10.14044/j.1674-1757.pcrpc.2013.04.015.

LIU SHENG-JUN, HUO CHUN-YAN, HE YAN, et al. Analysis and Treatment on Higher Secondary Voltage of One 220kV CVT. [J]. Power capacitor & reactive power compensation, 2013, 34(4): 69-74. DOI： 10.14044/j.1674-1757.pcrpc.2013.04.015.

摘要

详细分析了一起CVT二次电压偏高故障的原因。结果表明

由于中压电容C22末端引出线未采用接线鼻子

而是通过铜绞线缠绕并锡焊处理。连接时

由于生产厂家工艺控制不严

末端引出线接线端部有缺陷。长期运行过程中

缺陷逐步扩大最终形成放电

破坏了油室之间的密封结构

造成高压电容C12上部电容元件由于缺油而击穿

引起二次电压升高。最后结合系统运行情况提出了相应的预防措施。

Abstract

In this paper

the cause of higher secondary voltage of one capacitor voltage transformer is analyzed in detail.It is shown that since medium-voltage capacitor C 22 terminal outlet wire without using terminal block

but using copper wire winding and soldering treatment

the manufacturer is not strict in the process control in the connection

wiring end of outlet wire has defects.The defects is developed gradually and finally formed into discharge during long term operation

which damages sealing structure between oil compartments

causes breakdown of C 12 upper capacitor element due to lack of oil and then causes secondary voltage rise.Moreover

corresponding preventive measure is proposed based on system operation.

关键词

电容式电压互感器（CVT）电容元件悬浮放电击穿故障

Keywords

capacitive voltage transformer（CVT）capacitor elementsuspended dischargebreakdownfault

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Related Author

FU Wei-ping

LU Feng-chao

HUO Chun-yan

LIU Sheng-jun1

HUO Chun-yan2

YANG Yu-xia1

MU Jingyu

HUA Chao

Related Institution

EHV Transmission & Transformation Branch of Hebei Province Electric Power Company

Maintenance Company,State Grid Anhui Electric Power Company

Ultra High Voltage Branch of State Grid Jibei Electric Power Co, Ltd

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Guilin Power Capacitor Works

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