Broadband modeling and testing research of the DC electronic current transformer

高树永; 杨松语; 包森布尔; 王鹏; 王蓬; 乐健

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Broadband modeling and testing research of the DC electronic current transformer

更新时间：2026-02-02

- Broadband modeling and testing research of the DC electronic current transformer
- Vol. 63, Issue 1, (2026)
- 作者机构：
  
  1. 国网内蒙古东部电力有限公司内蒙古超特高压分公司, 内蒙古锡林浩特,026000
  2. 武汉大学电气与自动化学院,武汉,430072
- 作者简介：
- 基金信息：
- DOI：
  CLC：
- Published：2026
- 稿件说明：
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高树永, 杨松语, 包森布尔, et al. Broadband modeling and testing research of the DC electronic current transformer[J]. 2026, 63(1).
DOI：

高树永, 杨松语, 包森布尔, et al. Broadband modeling and testing research of the DC electronic current transformer[J]. 2026, 63(1). DOI：

摘要

电网故障时电流波形通常会出现突变或包含大量高次谐波，为了能够更准确地获取和分析电网一次电流，文中对直流电子式电流互感器的一次传感部分进行了宽频域建模。该模型包含罗氏线圈和分流器两部分，罗氏线圈参考分布参数模型，分流器主要考虑电感分量和集肤效应的影响，在Matlab / Simulink软件中搭建了对应的宽频仿真模型。同时，为了验证仿真模型的正确性，现场搭建了罗氏线圈和分流器的测试系统，进行了现场测试，将实际测试数据与仿真数据进行了比对。结果表明，所搭建的罗氏线圈和分流器的宽频模型能够较为准确地反映实际情况，罗氏线圈可以根据频率和误差要求采用多段代替无穷段的思想，分流器中的残余电感和集肤效应是影响其高频特性的主要因素，文章为直流电子式电流互感器宽频特性研究提供了参考。

Abstract

When the power grid fault occurs

the current waveform usually experiences mutations or contains a large number of high-order harmonics. In order to obtain and analyze the primary current of the power grid more accurately

this paper models the primary sensing part of the DC electronic current transformer (DC ECT) in a wide frequency domain. This model consists of two parts: a Rogowski coil and a shunt. The Rogowski coil refers to the distributed parameter model

and the shunt mainly considers the influence of inductance components and skin effects. A corresponding broadband simulation model is built in Matlab / Simulink software. Meanwhile

in order to verify the correctness of the simulation model

a testing system for the Rogowski coil and shunt is built on site

and on-site testing is conducted. The actual test data is compared with the simulation data. The results show that the broadband models of the Rogowski coil and shunt constructed can accurately reflect the actual situation. The Rogowski coil can adopt the idea of using multiple segments instead of infinite segments according to frequency and error requirements. The residual inductance and skin effect in the shunt are the main factors affecting its high-frequency characteristics. This paper provides a reference for the study of broadband characteristics of DC ECT.

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