某35 kV開(kāi)關(guān)柜局部放電及受潮的原因分析
林根德,陳達(dá),黃繼來(lái),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(kāi)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(kāi)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(kāi)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(kāi)關(guān)柜受潮過(guò)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(kāi)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(guò)一年的跟蹤監(jiān)測(cè),開(kāi)關(guān)室內(nèi)的濕度保持在50% 左右,開(kāi)關(guān)柜內(nèi)的濕度保持在48% 左右,未發(fā)現(xiàn)開(kāi)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(kāi)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
參考文獻(xiàn)
[1] 李軍浩,韓旭濤,劉澤輝,等. 電氣設(shè)備局部放電檢測(cè)技術(shù)述評(píng)[J]. 高電壓技術(shù),2015,41(8):2583-2601.
[2] 戴罕奇,趙晨龍,徐冰,等. 染污復(fù)合絕緣子受潮過(guò)程研究[J]. 電網(wǎng)技術(shù),2016,40(7):2227-2235.
[3] 黃世龍,王曉輝,郭旭敏,等. 采用TEV傳感器的開(kāi)關(guān)柜局部放電檢測(cè)技術(shù)研究與實(shí)現(xiàn)[J]. 高壓電器,2016,52(10):19-26.
[4] 馮波,肖代波,李毅,等. 暫態(tài)對(duì)地電壓和超聲法用于開(kāi)關(guān)柜不同濕度PD檢測(cè)研究[J]. 高壓電器,2015,51(4):67-71.
[5] 鄧雨榮,田樹(shù)軍,李銳鵬,等. 一種改進(jìn)的10 kV開(kāi)關(guān)柜局部放電TEV檢測(cè)及定位技術(shù)[J]. 絕緣材料,2014,47(2):93-96.
[6] 丁然,田野,任紅向,等. 氣隙局部放電模型改進(jìn)及仿真[J]. 高電壓技術(shù),2016,42(12):3934-3940.
[7] 潘瑾,李曉峰,龐先海,等. 基于暫態(tài)對(duì)地電壓法和超聲波檢測(cè)法的開(kāi)關(guān)柜局放實(shí)驗(yàn)研究[J]. 電網(wǎng)技術(shù),2014,38(s2):179-181.
[8] 高波,包健康,鐘鑫,等. 沿面放電時(shí)環(huán)氧樹(shù)脂車頂絕緣子的溫度分布及耐電痕分析[J]. 高電壓技術(shù),2016,42(11):3576-3584.
[9] 葉海峰,錢勇,王紅斌,等. 開(kāi)關(guān)柜表面暫態(tài)地電壓信號(hào)頻譜特征[J]. 高電壓技術(shù),2015,41(11):3849-3857.
[10] 吳吉,呂鴻,王流火,等. 開(kāi)關(guān)柜局部放電暫態(tài)地電波(TEV) 傳播特性的實(shí)驗(yàn)研究[J]. 高壓電器,2014,50(11):115-121.
[11] 嵇麗明,邱崑,徐翀,等. 開(kāi)關(guān)柜局部放電綜合診斷技術(shù)的應(yīng)用研究[J]. 高壓電器,2014,50(7):106-110.