山东电力技术2025，Vol.52Issue(9)：96-103,8.DOI:10.20097/j.cnki.issn1007-9904.2025.09.010
基于回波损耗的GIS特高频内置传感器现场校验方法研究
Research on On-site Calibration Method of GIS UHF Built-in Sensors Based on Return Loss
摘要
Abstract
The ultra-high frequency(UHF)built-in sensors are arranged inside the gas insulated switchgear,which can monitor the UHF electromagnetic wave signals generated by partial discharge in real time.However,due to factors such as equipment vibration and environmental temperature during long-term operation,the performance of the built-in sensors may deteriorate,resulting in the inability to accurately monitor partial discharge signals.Therefore,it is necessary to study the on-site calibration method of the built-in sensors,so as to regularly evaluate the performance of the built-in sensors during operation.This article analyzed the physical meaning of the return loss of built-in sensors based on the structural principle of GIS built-in sensors and the theory of multi-port networks,and confirmed that the return loss can effectively reflect the operating status of the built-in sensors.Subsequently,based on the structural dimensions of typical GIS chambers,a three-dimensional simulation model with an equal proportion of UHF built-in sensors was established,and the correctness of the simulation model was verified by comparing the simulation results of the return loss curve with on-site measured data.Further,the characteristics of return loss curves were researched by simulation for two typical defects of built-in sensor,namely insulation degradation of the dielectric layer and poor contact of the feeder pole,which provided reference for on-site verification and defect diagnosis of the built-in sensor during operation.关键词
GIS/局部放电/特高频内置传感器/回波损耗/现场校验Key words
GIS/partial discharge/UHF built-in sensors/return loss/on-site calibration分类
信息技术与安全科学引用本文复制引用
张丕沛,朱振龙,于吉,成鲁钰,宋磊..基于回波损耗的GIS特高频内置传感器现场校验方法研究[J].山东电力技术,2025,52(9):96-103,8.基金项目
国家电网有限公司科技项目(520626220048). Science and Technology Project of State Grid Corporation of China(520626220048). （520626220048）
