Simulation of anti-interference degradation in GIS UHF sensors based on substation white-noise reconstruction

田天; 周秀; 杨永泽; 马宇坤; 牛勃; 房春旭; 万钧

doi:10.3969/j.issn.1672-3643.2025.06.004

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Simulation of anti-interference degradation in GIS UHF sensors based on substation white-noise reconstruction

更新时间：2026-01-09

- Simulation of anti-interference degradation in GIS UHF sensors based on substation white-noise reconstruction
- Ningxia Electric Power Issue 6, (2025)
- 作者机构：
  
  1. 国网宁夏电力有限公司电力科学研究院,宁夏,银川,750011
  2. 南京谷贝电气科技有限公司,江苏,南京,211102
  3. 国网宁夏电力有限公司超高压公司,宁夏,银川,750011
- 作者简介：
- 基金信息：
- DOI：10.3969/j.issn.1672-3643.2025.06.004
  CLC：
- Published Online：22 December 2025，
  
  Published：22 December 2025
- 稿件说明：
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田天, 周秀, 杨永泽, et al. Simulation of anti-interference degradation in GIS UHF sensors based on substation white-noise reconstruction[J]. Ningxia Electric Power, 2025, (6).
DOI：

田天, 周秀, 杨永泽, et al. Simulation of anti-interference degradation in GIS UHF sensors based on substation white-noise reconstruction[J]. Ningxia Electric Power, 2025, (6). DOI： 10.3969/j.issn.1672-3643.2025.06.004.

摘要

基于特高频原理的气体绝缘组合电器（gas insulated switchgear

GIS）局部放电带电检测技术因具有灵敏度高，可实时监测等特点，已实现规模化应用。然而特高频传感器易出现抗扰性退化，为保证监测数据可信度

需要在现场噪声环境下对传感器进行校验。首先

分析了GIS环境中特高频传感器所接收白噪声的时频域特征，利用传感器收发互易性质，提出基于外部传感器的噪声重构方法，实现现场白噪声模拟;其次，基于电磁仿真建立标准传感器与退化传感器模型，量化天线锈蚀等因素对传感器回波阻抗散射参数（scatter parameter，SP）和电压驻波比（voltage standing wave ratio

VSWR）等性能参数的影响;最后，将两类传感器模型分别耦合至GIS手孔内，仿真对比分析白噪声环境下两类传感器接收信号波形特征及信噪比（signal-to-noise ratio

SNR）。结果表明，传感器因天线锈蚀导致谐振点偏移，局放信号功率降低55.27%，噪声信号功率增加64.11%，信噪比由-9.70 dB降低至-15.34 dB。以上结论为噪声环境下特高频传感器现场校验提供理论参考。

Abstract

The ultra-high frequency(UHF)-based partial discharge(PD)detection technology for gas-insulated switchgear(GIS)has been widely applied due to its high sensitivity and real-time monitoring capability.However

long-term service may cause antenna corrosion in UHF sensors

leading to degradation of their anti-interference performance.To ensure the reliability of monitoring data

on-site calibration of sensors under noisy conditions is required.This study first analyzes the time-frequency characteristics of white noise received by UHF sensors in GIS environments.By leveraging the transceiver reciprocity of sensors

a noise reconstruction method based on external sensors is proposed to simulate on-site white noise.Simulation models of both standard and degraded sensors are then established to quantify the effects of antenna corrosion on performance parameters such as echo impedance(S11)and voltage standing wave ratio(VSWR).Finally

both sensor models are coupled into GIS handholes for comparative simulation analysis.Simulation results show that antenna corrosion shifts the resonant frequency

reduces PD signal power by 55.27%

and increases noise power by 64.11%.Consequently

the signal-to-noise ratio(SNR)decreases from -9.70 dB to -15.34 dB

with evident waveform distortion indouble-exponential PD pulses.The findings provide a theoretical reference for on-site calibration of UHF sensors in noisy environments.

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