Equivalent Test Method for Stray Magnetic Field Interference of Three-phase Heavy Current Transformer

ZHAO Wei; XU Wenjia; LI Shisong; QU Kaifeng; HUANG Songling; JIANG Bo

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Equivalent Test Method for Stray Magnetic Field Interference of Three-phase Heavy Current Transformer

更新时间：2025-12-08

- Equivalent Test Method for Stray Magnetic Field Interference of Three-phase Heavy Current Transformer
- Vol. 42, Issue 11, Pages: 3651-3658(2016)
- 作者机构：
  
  1. 清华大学电机工程与应用电子技术系电力系统及发电设备控制和仿真国家重点实验室
  2. 北京云道智造科技有限公司
  3. 国网四川省电力公司计量中心
- 作者简介：
- 基金信息：
- DOI：
  CLC：
- Published Online：20 November 2016，
  
  Published：2016
- 稿件说明：
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ZHAO Wei, XU Wenjia, LI Shisong, et al. Equivalent Test Method for Stray Magnetic Field Interference of Three-phase Heavy Current Transformer[J]. 2016, 42(11): 3651-3658.
DOI：

ZHAO Wei, XU Wenjia, LI Shisong, et al. Equivalent Test Method for Stray Magnetic Field Interference of Three-phase Heavy Current Transformer[J]. 2016, 42(11): 3651-3658. DOI：

摘要

针对三相三线制电力系统水平排列母线上大电流互感器（HCT）易受到外电流产生的杂散磁场干扰的问题

提出了一种利用偏心母线电流及其返回导体电流共同产生的干扰磁场来等效杂散磁场的测试方法。在对该测试方法的论证上

基于大量数值仿真计算结果

构建了一个表征上述杂散磁场以及干扰磁场最大值的近似计算式。依据该近似计算式

可建立表征上述磁场等效关系的数学模型

反推得到通电偏心母线及其返回导体的摆放位置。基于研究结果对某厂家生产的HCT受外磁场干扰进行仿真计算

该方法得到的干扰磁场分布曲线与其最大杂散磁场分布曲线基本一致

因此可较准确、有效地模拟三相三线制系统水平排列母线上HCT受到外电流产生的杂散磁场的干扰。

Abstract

We put forward a stray flux test method for the heavy current transform（HCT） in a three-phase horizontal alignment bus system

based on the magnetic field synthesis of both the eccentric bus current and the return bus current to calculate the stray flux generated from external currents in a three-phase bus system. In the proposal

based on intensive analysis of numerical simulation results

a formula is obtained for solving the HCT stray flux and the maximum interference magnetic field. Under the formula

the mathematical model of the equivalent relationship between two types of magnetic field is given. Moreover

by solving the equation

we get the locating place of the eccentric and return buses. In order to evaluate the presented method

a real HCT has been taken as an example

the calculation results show that magnetic field curve and maximum HCT stray flux curve are consistent in shape

the presented method can accurately and effectively simulate the stray flux of the HCT in a three-phase bus system.

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