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

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GIS過熱案例分析及回路電阻檢測(cè)方法探討

來源:電工電氣發(fā)布時(shí)間:2017-12-19 14:19 瀏覽次數(shù):4
GIS過熱案例分析及回路電阻檢測(cè)方法探討
 
鄧威
(廣東電網(wǎng)有限責(zé)任公司中山供電局,廣東 中山 528400)
 
    摘 要:GIS設(shè)備過熱故障原因主要有導(dǎo)體連接部位螺栓松動(dòng)、電弧灼傷、彈簧疲勞、接觸面積減小等造成接觸電阻增大,溫度急劇升高,導(dǎo)體或緊固件熔化導(dǎo)致設(shè)備短路故障。在分析幾起GIS設(shè)備過熱故障、異常案例的基礎(chǔ)上,評(píng)估了回路電阻檢測(cè)、氣體分解物測(cè)試、局部放電檢測(cè)等幾種方法對(duì)于GIS過熱故障前預(yù)防、故障后定位的應(yīng)用效果,認(rèn)為回路電阻檢測(cè)對(duì)于發(fā)現(xiàn)各種原因?qū)е碌腉IS過熱缺陷最為直接有效。經(jīng)模擬實(shí)驗(yàn)輔助驗(yàn)證,證明了該方法的有效性,并對(duì)GIS設(shè)備回路電阻檢測(cè)提出了相關(guān)建議。
    關(guān)鍵詞:GIS;過熱;案例分析;回路電阻檢測(cè)
    中圖分類號(hào):TM595     文獻(xiàn)標(biāo)識(shí)碼:A     文章編號(hào):1007-3175(2017)12-0051-05
 
Case Analysis and Discussion on Loop Resistance Detection Method for Overheat of Gas Insulated Switchgear
 
DENG Wei
(Zhongshan Power Supply Bureau of Guangdong Power Grid Co., Ltd, Zhongshan 528400, China)
 
    Abstract: The overheat faults of gas insulated switchgear (GIS) equipment were caused mainly by the conductor connection bolt looseness, arc burning, spring fatigue, contact area reduction and so on, which gave rise to the contact resistance increasing, the temperature rising sharply and the conductor or fastener melting, resulting in the equipment short circuit faults. This paper analyzed several faults and abnormal cases of GIS equipment overheat and evaluated the application effect for the prevention before GIS equipment overheat faults and the location after faults by the loop resistance, gas decomposer and partial discharge etc detection methods. The loop resistance detection was the direct and effective method to find various kinds of reasons leading to the GIS overheat defect. The auxiliary verification of simulation experiment verifies the validity of this method. This paper proposes some suggestions on the loop resistance detection of GIS equipment.
    Key words: gas insulated switchgear; overheat; case analysis; loop resistance detection
 
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