在低壓側進行無功補償,很多單位都會采取電容補償,電力電容器是常見的無功補償裝置。在干式電容器出現以前,電力電容器都是油浸式電容器,油浸式電容器在安裝、運行或操作不當等原因都可能引起著火或者爆炸事故發生,本文就簡單討論一下引起油浸式電容器爆炸的原因都有哪些?
1、電容器疏于管理,保養不到位
一定要對電力電容器進行監測,要及時發現電容器異常。監測電容器的溫度變化,如果溫度過高,要及時采取降溫措施,定期清潔設備衛生。
2、頻繁投切加速絕緣老化
在無功經常波動的系統中,電容器會頻繁投切并在電網中形成震蕩回路,產生過電壓和過電流,加速了絕緣介質的老化,逐步發展到電擊穿,最后電容器爆炸以至引起火災。
3、高次諧波的危害
當(dang)高次諧波發生諧振時(shi),最容(rong)易使電容(rong)器過負荷、過熱、振動甚至損壞(huai)。
以上(shang)就是油(you)浸式電(dian)(dian)容(rong)(rong)(rong)(rong)(rong)器(qi)(qi)容(rong)(rong)(rong)(rong)(rong)易發生(sheng)爆炸著火的原因,自從干式電(dian)(dian)容(rong)(rong)(rong)(rong)(rong)器(qi)(qi)出現(xian)以后,市(shi)場已(yi)經(jing)開始普(pu)遍接受了(le)這種(zhong)更安全的電(dian)(dian)容(rong)(rong)(rong)(rong)(rong)器(qi)(qi)。比如希拓電(dian)(dian)氣(qi)干式電(dian)(dian)容(rong)(rong)(rong)(rong)(rong)器(qi)(qi),采用氮(dan)氣(qi)填充,不(bu)會著火。所有電(dian)(dian)容(rong)(rong)(rong)(rong)(rong)器(qi)(qi)都安裝過(guo)壓(ya)分(fen)離保(bao)護裝置。當電(dian)(dian)容(rong)(rong)(rong)(rong)(rong)器(qi)(qi)內部發生(sheng)大量電(dian)(dian)氣(qi)擊穿,產生(sheng)氣(qi)體使鋁殼內氣(qi)壓(ya)迅速(su)上(shang)升引起頂蓋(gai)膨脹及(ji)凹(ao)邊(bian)拉伸,到(dao)達一定極限時內部連接線(xian)分(fen)離,電(dian)(dian)容(rong)(rong)(rong)(rong)(rong)器(qi)(qi)和電(dian)(dian)網隨之斷開(為確保(bao)實現(xian)過(guo)壓(ya)分(fen)離,在電(dian)(dian)容(rong)(rong)(rong)(rong)(rong)器(qi)(qi)上(shang)端(duan)鋁蓋(gai)及(ji)端(duan)子不(bu)得受阻)。
希拓電氣STC電容器是一種圓柱型自愈式環保防爆電容器,采(cai)用先進的(de)(de)自愈式(shi)高(gao)級(ji)金屬化聚(ju)丙(bing)烯(xi)薄膜(MKP)技(ji)術,以確(que)保(bao)繞(rao)組具(ju)有很好的(de)(de)精度。采(cai)用氣(qi)體取(qu)代傳統的(de)(de)油(you)及樹脂等(deng)電介質,以干式(shi)技(ji)術實現對電容器的(de)(de)環保(bao)安全(quan)和(he)體積小型化的(de)(de)更高(gao)要求。通過長時(shi)間的(de)(de)真空(kong)(kong)干燥技(ji)術來(lai)確(que)保(bao)電容器的(de)(de)工作穩(wen)定性。便攜的(de)(de)裝(zhuang)配方式(shi)和(he)良好的(de)(de)散熱(re)性能在更好的(de)(de)改善諧波危(wei)害和(he)校正功率(lv)因數的(de)(de)同時(shi),大幅(fu)節(jie)約安裝(zhuang)空(kong)(kong)間。