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

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某35 kV開關(guān)柜局部放電及受潮的原因分析

來源:電工電氣發(fā)布時(shí)間:2017-08-23 12:23 瀏覽次數(shù):7
某35 kV開關(guān)柜局部放電及受潮的原因分析
 
林根德,陳達(dá),黃繼來,葉隆,張海龍,鄭娟娟
(國(guó)網(wǎng)浙江省電力公司溫州供電公司,浙江 溫州 325000)
 
    摘 要:針對(duì)某開關(guān)柜運(yùn)行中多個(gè)間隔局部放電數(shù)值超標(biāo)的現(xiàn)象,對(duì)開關(guān)柜內(nèi)設(shè)備進(jìn)行停電檢查及絕緣性能試驗(yàn),分析了開關(guān)柜自身結(jié)構(gòu)及其運(yùn)行環(huán)境中存在的薄弱因素,建立了開關(guān)柜受潮過程的模型,研究了設(shè)備絕緣性能下降的機(jī)理,并提出了更換老化、受潮絕緣件,在開關(guān)柜內(nèi)安裝加熱器、除濕機(jī),增強(qiáng)電纜溝防水性及電纜孔洞密封性等改進(jìn)措施。經(jīng)過一年的跟蹤監(jiān)測(cè),開關(guān)室內(nèi)的濕度保持在50% 左右,開關(guān)柜內(nèi)的濕度保持在48% 左右,未發(fā)現(xiàn)開關(guān)柜內(nèi)設(shè)備局部放電及受潮、老化現(xiàn)象,設(shè)備絕緣性能良好。
    關(guān)鍵詞:開關(guān)柜;局部放電;受潮;絕緣性能
    中圖分類號(hào):TM591     文獻(xiàn)標(biāo)識(shí)碼:B     文章編號(hào):1007-3175(2017)08-0039-04
 
Causes Analysis of Partial Discharge and Damp for Certain 35 kV Switchgear
 
LIN Gen-de, CHEN Da, HUANG Ji-lai, YE Long, ZHANG Hai-long, ZHENG Juan-juan
(State Grid Zhejiang Whenzhou Electric Power Company, Wenzhou 325000, China)
 
    Abstract: In allusion to the overproof standard phenomenon of multi-interval partial discharge, the equipment inside the switchgear was carried out the power-off examination and insulating property test. This paper analyzed the weakness factors existing in the structure of switchgear itself and its operating environment, established the model of switchgear damp process and studied the mechanism of insulating property degradation. This paper proposed the improvement measures, such as changing aging and damp insulating parts, installing heaters and dehumidifiers, enhancing cable ducts waterproofness and cable void leakproofness etc. after one year’s tracking monitoring, it is found that the humidity inside switch rooms keeps about 50%, the humidity inside switchgear keeps about 48% and the equipment inside the switchgear has no partial discharge, damp and aging, with good insulating property.
    Key words: switchgear; partial discharge; damp; insulating property
 
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