Simulation and Analysis on Error of Protective Type CT due to Residual Magnetism

QIAN Jia-li1; GUAN Yong-gan1; XU Guo-zheng1; KONG Xiang-jun2; LI Xiang-yang2

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Simulation and Analysis on Error of Protective Type CT due to Residual Magnetism

更新时间：2025-04-26

- Simulation and Analysis on Error of Protective Type CT due to Residual Magnetism
- High VoltageApparatus Issue 1, Pages: 26-28(2005)
- 作者机构：
  
  1.   清华大学电机与应用电子技术系
  2.   中国电力科学研究院高压开关研究所
  3.   中国电力科学研究院高压开关研究所北京100084
  4.   北京100085
- 作者简介：
- 基金信息：
- DOI：
  CLC： TM452
- Published：2005
- 稿件说明：
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[1]钱家骊,关永刚,徐国政,孔祥军,李向阳.剩磁对保护型电磁式电流互感器误差影响的仿真研究[J].高压电器,2005(01):26-28.

QIAN Jia-li1, GUAN Yong-gan1, XU Guo-zheng1, et al. Simulation and Analysis on Error of Protective Type CT due to Residual Magnetism[J]. High voltageapparatus, 2005, (1): 26-28.
[1]钱家骊,关永刚,徐国政,孔祥军,李向阳.剩磁对保护型电磁式电流互感器误差影响的仿真研究[J].高压电器,2005(01):26-28. DOI：

QIAN Jia-li1, GUAN Yong-gan1, XU Guo-zheng1, et al. Simulation and Analysis on Error of Protective Type CT due to Residual Magnetism[J]. High voltageapparatus, 2005, (1): 26-28. DOI：

摘要

在现场的电磁式电流互感器

所测得的三相短路电流波形会出现非常严重的畸变

误差也极大

且分散性很大

与因铁心饱和造成的波形畸变又不相同。利用电磁暂态程序EMTP进行机理分析的结果认为:短路电流起始相位的随机性以及互感器铁心剩磁方向的随机性会导致上述现象的出现。

Abstract

It is found that there are serious distortion and big error and schattering seriously in three-phase short circuit current measurement with electro-magnetic CT in field test

and the waveform is different from that due to magnetic saturation. With simulation by EMTP

it shows that both the random initial phase of short circuit current and the random direction and value of residual magnetism are the reason of above-mentioned phenomenon.

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