在(zai)無功補償裝置中，由于作(zuo)為主要(yao)元器件(jian)的電(dian)(dian)力補償電(dian)(dian)容(rong)(rong)器運(yun)行條件(jian)要(yao)求較高，且容(rong)(rong)易因過(guo)電(dian)(dian)壓(ya)以(yi)及(ji)過(guo)電(dian)(dian)流等問(wen)題(ti)(ti)發生故障，因此在(zai)無功補償系統設計(ji)時通常(chang)(chang)會為其加裝一系列(lie)的保護裝置，以(yi)確保電(dian)(dian)容(rong)(rong)器能(neng)夠(gou)正(zheng)常(chang)(chang)運(yun)行。接(jie)下來(lai)小庫就帶大家了解一下電(dian)(dian)力補償電(dian)(dian)容(rong)(rong)器常(chang)(chang)見(jian)的保護方式以(yi)及(ji)需要(yao)注意的問(wen)題(ti)(ti)。

對保護裝置的要求

為電(dian)力補償電(dian)容(rong)器(qi)(qi)組(zu)(zu)選(xuan)擇(ze)合(he)適的(de)(de)(de)的(de)(de)(de)保(bao)護(hu)方(fang)(fang)式是保(bao)證其(qi)自身(shen)及電(dian)力系統中(zhong)負載安全(quan)可靠運行(xing)的(de)(de)(de)重(zhong)要前(qian)提，但不管選(xuan)用哪樣保(bao)護(hu)方(fang)(fang)式，都要求保(bao)護(hu)器(qi)(qi)需有(you)充足的(de)(de)(de)敏(min)感度，無論電(dian)容(rong)器(qi)(qi)組(zu)(zu)內部(bu)產生(sheng)常見故(gu)障(zhang)，還是一部(bu)分(fen)元器(qi)(qi)件(jian)(jian)毀壞，保(bao)護(hu)器(qi)(qi)都能快速可靠的(de)(de)(de)進行(xing)動作，在發生(sheng)故(gu)障(zhang)時(shi)可以快速的(de)(de)(de)選(xuan)擇(ze)退出故(gu)障(zhang)元器(qi)(qi)件(jian)(jian)，有(you)利于(yu)在開關電(dian)源切斷后查驗故(gu)障(zhang)元器(qi)(qi)件(jian)(jian)，在合(he)閘全(quan)過程以及供電(dian)系統接地裝(zhuang)置有(you)其(qi)他常見故(gu)障(zhang)時(shi)，保(bao)護(hu)器(qi)(qi)不可出現(xian)有(you)誤動作。

值得注意的問題(ti)

電力補償電容器在(zai)使(shi)用(yong)時不允許安(an)裝自動重(zhong)合(he)閘(zha)裝置，這是因為電(dian)(dian)容(rong)器充放(fang)電(dian)(dian)需要一(yi)定的時間，若電(dian)(dian)容(rong)器退(tui)出(chu)運行后立(li)刻重(zhong)合(he)閘(zha)，內部殘留電(dian)(dian)荷無法(fa)及時釋放(fang)，此(ci)時就會(hui)殘留著與(yu)重(zhong)合(he)閘(zha)工(gong)作電(dian)(dian)壓極性(xing)(xing)相(xiang)反的正電(dian)(dian)荷，使(shi)重(zhong)合(he)閘(zha)一(yi)瞬間造成(cheng)沖擊性(xing)(xing)電(dian)(dian)流(liu)，直接(jie)造成(cheng)電(dian)(dian)容(rong)器損壞。