Study on the Error Mechanism of Shielding Structure Defects of Rogowski Coil Electronic Current Transformer

XU Zili; HU Haoliang; LIU Qi; ZHANG Qian

doi:10.13296/j.1001-1609.hva.2019.02.025

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Study on the Error Mechanism of Shielding Structure Defects of Rogowski Coil Electronic Current Transformer

更新时间：2025-04-26

- Study on the Error Mechanism of Shielding Structure Defects of Rogowski Coil Electronic Current Transformer
- High VoltageApparatus Vol. 55, Issue 2, Pages: 176-182(2019)
- 作者机构：
  
  1. 中国电力科学研究院有限公司
  2. 华中科技大学电气与电子工程学院强电磁工程国家重点实验室
- 作者简介：
- 基金信息：
- DOI：10.13296/j.1001-1609.hva.2019.02.025
  CLC： TM452
- Published：2019
- 稿件说明：
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[1]徐子立,胡浩亮,刘琦,张茜.罗氏线圈电流互感器电屏蔽结构缺陷误差机理研究[J].高压电器,2019,55(02):176-182.

XU Zili, HU Haoliang, LIU Qi, et al. Study on the Error Mechanism of Shielding Structure Defects of Rogowski Coil Electronic Current Transformer[J]. High voltageapparatus, 2019, 55(2): 176-182.
[1]徐子立,胡浩亮,刘琦,张茜.罗氏线圈电流互感器电屏蔽结构缺陷误差机理研究[J].高压电器,2019,55(02):176-182. DOI： 10.13296/j.1001-1609.hva.2019.02.025.

XU Zili, HU Haoliang, LIU Qi, et al. Study on the Error Mechanism of Shielding Structure Defects of Rogowski Coil Electronic Current Transformer[J]. High voltageapparatus, 2019, 55(2): 176-182. DOI： 10.13296/j.1001-1609.hva.2019.02.025.

摘要

文中针对牡丹江110 kV桦林变10 kV数字化计量试点中发现的电子式电流互感器运行状态下误差异常故障

开展罗氏线圈原理电子式电流互感器电屏蔽结构缺陷产生的误差机理研究;通过理论分析建立电子式互感器的屏蔽结构在电场中所形成的耦合电容网络

提出附加误差电压计算公式

并利用有限元仿真软件计算无屏蔽、屏蔽破损、屏蔽接地失效等状态下外部电磁场对电子式电流互感器比值误差的影响量;通过实验室搭建测试平台复现并消除现场故障。相关研究工作对完善电子式电流互感器现场检测方法、及时发现故障隐患和故障原因提供实践依据。

Abstract

The electronic current transformers（ECTs）based on Rogowski coil principle are used in the 10 kV digital measurement pilot line in 110 kV Hualin Substation in Mudanjiang.During the long-term operation of the equipment

some faults unexpected of the ECTs are found out.Thus the error mechanism of the ECTs’ electrical shielding structure defects is developed in this paper.The coupling capacitor structure of the transformer is formed in the electric field

and an additional error voltage calculation formula is proposed.The finite element simulation is used to calculate the external electromagnetic field to the ECT under the conditions of no shielding

shielding damage and shielding without ground.The field failures can be reproduced and eliminated through the laboratory test platform.These research works provide a practical basis for improving the on-site detection method of ECTs and finding hidden troubles in time.

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