Analysis of High-voltage Fuse Blow for 35 kV Capacitor Voltage Transformer

LUO Jun-chuan

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Analysis of High-voltage Fuse Blow for 35 kV Capacitor Voltage Transformer

更新时间：2025-04-26

- Analysis of High-voltage Fuse Blow for 35 kV Capacitor Voltage Transformer
- High VoltageApparatus Vol. 45, Issue 3, Pages: 124-127(2009)
- 作者机构：
  
  四川省广元电业局
- 作者简介：
- 基金信息：
- DOI：
  CLC： TM451.2
- Published：2009
- 稿件说明：
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[1]罗军川.35kV电容式电压互感器高压熔断器熔断的原因分析[J].高压电器,2009,45(03):124-127.

LUO Jun-chuan. Analysis of High-voltage Fuse Blow for 35 kV Capacitor Voltage Transformer[J]. High voltageapparatus, 2009, 45(3): 124-127.
[1]罗军川.35kV电容式电压互感器高压熔断器熔断的原因分析[J].高压电器,2009,45(03):124-127. DOI：

LUO Jun-chuan. Analysis of High-voltage Fuse Blow for 35 kV Capacitor Voltage Transformer[J]. High voltageapparatus, 2009, 45(3): 124-127. DOI：

摘要

针对一起35 kV电容式电压互感器高压熔断器频繁熔断现象

笔者详细分析了电容式电压互感器（CVT）的工作原理及等值电路。通过CVT中压互感器的伏安特性试验

得出了在系统发生单相接地故障或故障消除的过渡过程中CVT中压互感器铁芯深度饱和激发铁磁谐振

从而导致高压熔断器熔断的结论。笔者还提出在CVT中压互感器二次剩余绕组并联阻尼器是抑制铁磁谐振行之有效的措施。同时

在产品设计制造时应着力改善中压互感器的空载励磁特性

选择伏安特性优越的中压互感器。分析结果为改进产品设计、提高制造工艺水平和优化运行维护提供了科学依据。

Abstract

The operation mechanism and equivalent circuit of a capacitor voltage transformer（CVT） are investigated for analyzing the frequent blow of a 35 kV CVT high-voltage fuse protector.By volt-ampere characteristic test of a medium voltage CVT

it is found that the core of medium voltage CVT is saturated deeply to excite ferromagnetic resonance

which leads to the high-voltage fuse protector blow

during the transition process of single-phase grounding failure or failure elimination.And then

an available method for ferromagnetic resonance inhibition is proposed

in which a damper is paralleled to the secondary residual winding in the medium voltage CVT.Moreover

it is necessary to improve non-load magnetization characteristic of medium voltage transformer and choose the one with superior volt-ampere characteristic in design and manufacture process.

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