摘要
开关柜设备在电力系统中发挥着核心枢纽作用,一旦发生故障将引发大规模停电事故,带电检测技术能够及时发现开关柜早期潜伏性缺陷,但易受环境因素干扰,检测结果依赖于检测人员的现场经验,且尚无全面准确的评价标准。围绕35 kV高压开关柜常见局部放电问题,选取实际带电检测案例,从暂态地电压检测、超声波检测和特高频检测三个方面,归纳总结出电晕放电、悬浮放电、沿面放电、内部放电的典型特征,并进一步挖掘局部放电的根源,提出针对性解决策略,旨在为开关柜状态评估与异常诊断提供科学有效的参考依据。
Switchgear equipment plays a key role in the power system.Once a fault occurs,it will cause a large-scale blackout.Live detection technology can detect the early latent defects of switchgear in time,but it is susceptible to environmental factors.The detection results depend on the on-site experience of the inspectors,and there is no comprehensive and accurate evaluation standard.This paper focuses on the common partial discharge problems of 35 kV high-voltage switchgear,selects the actual live detection cases,and summarizes the typical characteristics of corona discharge,suspension discharge,surface discharge and internal discharge from three aspects of transient ground voltage detection,ultrasonic detection and ultra-high frequency detection.And further explore the root causes of partial discharge,and propose targeted solutions,aiming to provide a scientific and effective reference for state assessment and abnormal diagnosis of switchgear.
作者
党君武
庄雷明
赵祥龙
陈涛
李小龙
杨凯强
陆浩
曾会师
DANG Junwu;ZHUANG Leiming;ZHAO Xianglong;CHEN Tao;LI Xiaolong;YANG Kaiqiang;LU Hao;ZENG Huishi(State Grid Linyi Power Supply Company,Linyi 276000,China)
出处
《电工技术》
2025年第S1期108-111,共4页
Electric Engineering
关键词
高压开关柜
局部放电
带电检测
特征分析
high voltage switchgear
partial discharge
live detection
feature analysis
