Suzhou Electric Appliance Research Institute
期刊號(hào): CN32-1800/TM| ISSN1007-3175

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基于超聲波檢測(cè)的GIS設(shè)備自由顆粒放電缺陷案例分析

來源:電工電氣發(fā)布時(shí)間:2025-01-23 13:23 瀏覽次數(shù):28

基于超聲波檢測(cè)的GIS設(shè)備自由顆粒放電缺陷案例分析

郭超,石凱萌,蔡川,邱煒,陳佳,劉佳,魏意恒,黃思敏
(國網(wǎng)四川省電力公司成都供電公司,四川 成都 610000)
 
    摘 要:在設(shè)備驗(yàn)收階段及時(shí)找出并排除設(shè)備內(nèi)部缺陷,對(duì)提升電網(wǎng)設(shè)備安全運(yùn)行裕度具有重要意義。介紹了一起通過超聲波檢測(cè)技術(shù)發(fā)現(xiàn)某變電站 220 kV GIS(氣體絕緣組合電器) 斷路器自由顆粒缺陷的案例。介紹了其缺陷檢測(cè)、綜合分析、設(shè)備解體驗(yàn)證過程,闡述了帶電檢測(cè)過程中的正確檢測(cè)方法、干擾排除技巧、缺陷分析手段以及精準(zhǔn)定位閉環(huán)結(jié)果,創(chuàng)新性地采用了數(shù)據(jù)庫比對(duì)與波形特征綜合研判等方式,精準(zhǔn)確定放電類型,通過幅值定位法精準(zhǔn)確定放電位置,并通過 GIS 開罐解體處理,發(fā)現(xiàn)了 GIS 斷路器氣室內(nèi)部的金屬異物,成功驗(yàn)證了超聲波檢測(cè)技術(shù)結(jié)果的準(zhǔn)確性,也為后續(xù)類似缺陷的檢測(cè)和處理提供了經(jīng)驗(yàn)與參考。
    關(guān)鍵詞: 氣體絕緣組合電器;斷路器;超聲波檢測(cè);自由顆粒放電
    中圖分類號(hào):TM595     文獻(xiàn)標(biāo)識(shí)碼:B     文章編號(hào):1007-3175(2025)01-0054-08
 
Case Analysis of Free Particles Discharge Defects in GIS
Equipment Based on Ultrasonic Detection
 
GUO Chao, SHI Kai-meng, CAI Chuan, QIU Wei, CHEN Jia, LIU Jia, WEI Yi-heng, HUANG Si-min
(State Grid Sichuan Electric Power Company Chengdu Power Supply Company, Chengdu 610000, China)
 
    Abstract: 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-insulated 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 determine 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.
    Key words: gas-insulated metal-enclosed switchgear; circuit breaker; ultrasonic detection; free particle discharge
 
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