首页|基于超声波检测的GIS设备自由颗粒放电缺陷案例分析

基于超声波检测的GIS设备自由颗粒放电缺陷案例分析

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在设备验收阶段及时找出并排除设备内部缺陷,对提升电网设备安全运行裕度具有重要意义.介绍了一起通过超声波检测技术发现某变电站 220 kV GIS(气体绝缘组合电器)断路器自由颗粒缺陷的案例.介绍了其缺陷检测、综合分析、设备解体验证过程,阐述了带电检测过程中的正确检测方法、干扰排除技巧、缺陷分析手段以及精准定位闭环结果,创新性地采用了数据库比对与波形特征综合研判等方式,精准确定放电类型,通过幅值定位法精准确定放电位置,并通过GIS开罐解体处理,发现了GIS断路器气室内部的金属异物,成功验证了超声波检测技术结果的准确性,也为后续类似缺陷的检测和处理提供了经验与参考.
Case Analysis of Free Particles Discharge Defects in GIS Equipment Based on Ultrasonic Detection
It is of great significance to find out and eliminate the internal defects in time in the equipment acceptance stage to improve the safe operating margin of power grid equipment.This article introduces a case of discovering free particle discharge in a 220 kV GIS(gas-in-sulated metal-enclosed switchgear)circuit breaker at a certain substation through ultrasonic detection technology.Then,introducing its process of defects detection,comprehensive analysis and equipment disassembly verification.Subsequently,the correct detection methods,interference elimination techniques,defect analysis methods and precise positioning closed-loop results in the process of live detection are described.Innovative methods such as database comparison and waveform characteristic comprehensive analysis were used to accurately de-termine the discharge type,and the discharge position was accurately determined through amplitude positioning method.Finally,through GIS can opening and disassembly processing to discover metal foreign objects inside the GIS circuit breaker chamber,successfully verifying the accuracy of ultrasonic detection technology results and providing experience and reference for the detection and treatment of similar defects in the future.

gas-insulated metal-enclosed switchgearcircuit breakerultrasonic detectionfree particle discharge

郭超、石凯萌、蔡川、邱炜、陈佳、刘佳、魏意恒、黄思敏

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国网四川省电力公司成都供电公司,四川 成都 610000

气体绝缘组合电器 断路器 超声波检测 自由颗粒放电

2025

电工电气
苏州电器科学研究所有限公司

电工电气

影响因子:0.254
ISSN:1007-3175
年,卷(期):2025.(1)