Research on Integrated Sensor for Combined Detection of Leakage Current and High Frequency Pulse Signals

WANG Zhihui; LIU Ruoxi; GUI Yuan; XU Xingquan; LI Xiuzhen; XU Ruoxuan; TANG Zhiguo

doi:10.13296/j.1001-1609.hva.2026.08.020

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Research on Integrated Sensor for Combined Detection of Leakage Current and High Frequency Pulse Signals

Research & Analysis | 更新时间：2026-08-12

- Research on Integrated Sensor for Combined Detection of Leakage Current and High Frequency Pulse Signals
- High Voltage Apparatus Vol. 62, Issue 8, Pages: 163-170(2026)
- 作者机构：
  
  国网北京市电力公司电力科学研究院，北京 100075
  华北电力大学，北京 102206
- 作者简介：
- 基金信息：
- DOI：10.13296/j.1001-1609.hva.2026.08.020
  CLC：
- Received：21 February 2026，
  
  Revised：2026-04-25，
  
  Published：16 August 2026
- 稿件说明：
移动端阅览
WANG Zhihui, LIU Ruoxi, GUI Yuan, et al. Research on Integrated Sensor for Combined Detection of Leakage Current and High Frequency Pulse Signals[J]. High Voltage Apparatus, 2026, 62(8): 163-170.
DOI：

WANG Zhihui, LIU Ruoxi, GUI Yuan, et al. Research on Integrated Sensor for Combined Detection of Leakage Current and High Frequency Pulse Signals[J]. High Voltage Apparatus, 2026, 62(8): 163-170. DOI： 10.13296/j.1001-1609.hva.2026.08.020.

摘要

柱上开关内部受潮导致绝缘失效是引发设备故障的主要原因，设备受潮后其泄漏电流会增大，并引发电场畸变从而产生放电。为此，文中研制了一种基于泄漏电流和高频脉冲电流联合检测的集成型传感器，针对该传感器的泄漏电流和高频脉冲电流耦合单元搭建了实验平台，研究了其泄漏电流耦合单元的线性度、灵敏度、准确度和重复性，以及高频脉冲电流耦合单元的检测频带和传输阻抗参数；通过同时加载泄漏电流和高频脉冲电流信号的方式分析了二者的交叉影响，进而对该传感器的综合性能进行了评估。结果表明：文中研制的传感器的泄漏电流检测范围为0～12 mA，线性度小于1%，经拟合后分辨率达到0.1 mA，满足电流传感器的线性度误差不超过±1%的标准；高频电流检测频带不低于32 MHz，平均传输阻抗不低于5 Ω；同时施加泄漏电流与高频脉冲电流时泄漏电流测量的最大偏差为3.47%，平均偏差百分比为1.61%，高频脉冲电流测量的最大偏差为9.91%，平均偏差百分比为3.91%，文中开发的传感器能够有效地对泄漏电流和高频脉冲电流进行同步检测，为柱上开关绝缘状态监测提供了技术支撑。

Abstract

Internal moisture ingress leading to insulation failure in pole-mounted switch is the main cause of equipment fault. Once the equipment becomes moisture

its leakage current increases

inducing electric field distortion and subsequently generating discharge. To address this issue

in this paper an integrated sensor based on the combined detection of leakage current and high-frequency pulse current is developed. An experimental platform is built for the leakage current and high-frequency pulse current coupling unit of the sensor.The linearity

sensitivity

accuracy

repeatability of the leakage current coupling unit and detection band width and transfer impedance parameters of the high-frequency pulse current coupling unit are investigated. The cross influence between the two signals is analyzed by simultaneously applying leakage current and high frequency pulse current signals and the comprehensive performance of the sensor is subsquently evaluated. The results show that the leakage current detection range of the sensor developed in this paper is 0~12 mA

with a linearity of less than 1%. After fitting

the resolution reaches 0.1 mA

which meets the standard that the linearity error of a current sensor shall not exceed ±1%. The highfrequency current detection frequency band shall not be less than 32 MHz

and the average transmission impedance shall not be less than 5 Ω. At the same time

in case of simultaneous application of both leakage current and highfrequency pulse current

the maximum deviation of leakage current measurement is 3.47%

with an average deviation percentage of 1.61%. The maximum deviation of frequency pulse current measurement is 9.91%

with an aver age deviation percentage of 3.91%. The sensor developed in this paper can effectively perform synchronous detection of both leakage current and high-frequency pulse current

providing technical support for insulation condition monitoring of pole-mounted switches.

关键词

Keywords

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