Discussion and Practice of Eliminating the Ferromagnetic Resonance in Electromagnetic Voltage Transformer

LIU Zhan-rong; HAN Min; TANG Ping; LIU Zhen-ling

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Discussion and Practice of Eliminating the Ferromagnetic Resonance in Electromagnetic Voltage Transformer

更新时间：2025-04-26

- Discussion and Practice of Eliminating the Ferromagnetic Resonance in Electromagnetic Voltage Transformer
- High VoltageApparatus Issue 4, Pages: 317-318(2006)
- 作者机构：
  
  1. 河南石油勘探局水电厂
  2. 河南石油勘探局水电厂河南南阳473132
- 作者简介：
- 基金信息：
- DOI：
  CLC： TM451;TM864
- Published：2006
- 稿件说明：
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[1]刘占荣,韩敏,唐平,刘振伶.一种消除电磁式电压互感器铁磁谐振方法的探讨与实践[J].高压电器,2006(04):317-318.

LIU Zhan-rong, HAN Min, TANG Ping, et al. Discussion and Practice of Eliminating the Ferromagnetic Resonance in Electromagnetic Voltage Transformer[J]. High voltageapparatus, 2006, (4): 317-318.
[1]刘占荣,韩敏,唐平,刘振伶.一种消除电磁式电压互感器铁磁谐振方法的探讨与实践[J].高压电器,2006(04):317-318. DOI：

LIU Zhan-rong, HAN Min, TANG Ping, et al. Discussion and Practice of Eliminating the Ferromagnetic Resonance in Electromagnetic Voltage Transformer[J]. High voltageapparatus, 2006, (4): 317-318. DOI：

摘要

通过对一般消谐方法的介绍与存在问题的分析

提出用测量接地电容器组相电流和零序电流获取系统三相对地电压和零序电压信号以取代PT肩负的绝缘监视功能

解除PT中性点接地

从根本上消除了PT的铁磁谐振;还介绍了该方法在某一个变电所的实施结果

证明其消谐振效果较理想。

Abstract

In this paper

the general methods of eliminating ferromagnetic resonance are introduced

and its problems are analyzed.To get the three-phase voltages and zero sequence voltage

by means of measuring the phase currents and zero sequence current across an earthing capacitor bank is proposed.This bank can replace the voltage transformer’s function of monitoring the insulation status.With this method

the neutral point of PT is removed

and the ferromagnetic resonance of PT is eliminated radically.The application results of a substation

in Henan Oil field

are also introduced

and the results are verified effective.

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