Test Method for Electrical Parameters of HFCT Based on Transmission Coefficient

ZHOU Kai; HUANG Yonglu; HE Min; WAN Hang; XIE Min; ZENG Qin; ZHAO Shilin

doi:10.13296/j.1001-1609.hva.2018.11.044

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Test Method for Electrical Parameters of HFCT Based on Transmission Coefficient

更新时间：2025-04-26

- Test Method for Electrical Parameters of HFCT Based on Transmission Coefficient
- High VoltageApparatus Vol. 54, Issue 11, Pages: 301-306(2018)
- 作者机构：
  
  1. 四川大学电气信息学院
  2. 国网重庆市电力公司电力科学研究院
- 作者简介：
- 基金信息：
- DOI：10.13296/j.1001-1609.hva.2018.11.044
  CLC： TM855
- Published：2018
- 稿件说明：
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[1]周凯,黄永禄,何珉,万航,谢敏,曾琴,赵世林.基于传输系数的HFCT电气参数测试方法研究[J].高压电器,2018,54(11):301-306.

ZHOU Kai, HUANG Yonglu, HE Min, et al. Test Method for Electrical Parameters of HFCT Based on Transmission Coefficient[J]. High voltageapparatus, 2018, 54(11): 301-306.
[1]周凯,黄永禄,何珉,万航,谢敏,曾琴,赵世林.基于传输系数的HFCT电气参数测试方法研究[J].高压电器,2018,54(11):301-306. DOI： 10.13296/j.1001-1609.hva.2018.11.044.

ZHOU Kai, HUANG Yonglu, HE Min, et al. Test Method for Electrical Parameters of HFCT Based on Transmission Coefficient[J]. High voltageapparatus, 2018, 54(11): 301-306. DOI： 10.13296/j.1001-1609.hva.2018.11.044.

摘要

目前

局部放电检测技术被认为是电力设备绝缘状态评估有效手段。其中基于电磁耦合法的高频电流传感器（HFCT）广泛应用于电力设备局放检测中。为了评估HFCT的性能

提出了一种基于传输系数的HFCT电气参数测试新方法。首先对HFCT进行电路等效和分析

并提出HFCT电气参数的测试方法和测试原理

同时利用网络分析仪和固定的测试夹具搭建测试系统;然后对测试系统进行电路等效和分析

得到网络分析仪测量的传输系数与HFCT的传递函数、传输阻抗之间的关系

并根据传输系数得到HFCT的带宽、上下限频率和传输阻抗;最后对多个HFCT进行实际测试

并统计各HFCT的带宽、上下限频率和灵敏度。测试结果表明

该测试方法能够快速、稳定地获取HFCT的电气参数

为HFCT性能评估提供数据支撑。

Abstract

High frequency current transducer（HFCT）based on electromagnetic coupling method has been widely used in partial discharge detection of power equipment. In order to evaluate the performance of HFCT

a new methodfor testing the electrical parameters of HFCT based on the transmission coefficient was presented. Firstly

the testmethods and test principle for the electrical parameters of HFCT were put forward based on equivalent circuit andanalysis of HFCT

and the test system was built by using the network analyzer and the test fixture. Then

through theequivalent circuit and analysis of the test system

the relationship between the HFCT transmission coefficient mea-sured by the network analyzer

the transfer function and transmission impedance were obtained

and the bandwidth

upper and lower frequencies

and transmission impedance of HFCT were obtained according to the transmission coef-ficient. Finally

actual test was conducted on a number of HFCTs to obtain the bandwidth

upper and lower frequen-cies

and sensitivity of the HFCTs. Test results show that this test method can acquire electrical parameters of HFCT rapidly and stably

and provide data support for evaluating the performance of HFCT.

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