根據用電(dian)(dian)(dian)設備的(de)(de)功(gong)率(lv)因數(shu)，可測算輸電(dian)(dian)(dian)線路的(de)(de)電(dian)(dian)(dian)能損失。通過現場(chang)技術改造，可使低(di)于(yu)標準要(yao)求的(de)(de)功(gong)率(lv)因數(shu)達(da)標，實現節電(dian)(dian)(dian)目的(de)(de)。采用無(wu)功(gong)補償(chang)技術，提高(gao)低(di)壓(ya)電(dian)(dian)(dian)網和用電(dian)(dian)(dian)設備的(de)(de)功(gong)率(lv)因數(shu)，是(shi)節電(dian)(dian)(dian)工作的(de)(de)一(yi)項重要(yao)措施。無(wu)功(gong)補償(chang)，它就是(shi)借(jie)助于(yu)無(wu)功(gong)補償(chang)設備提花必要(yao)的(de)(de)無(wu)功(gong)功(gong)率(lv)，以(yi)提高(gao)系統的(de)(de)功(gong)率(lv)因數(shu)，降低(di)能耗，改善電(dian)(dian)(dian)網電(dian)(dian)(dian)壓(ya)質量，穩定設備運行。

電(dian)力中無功補(bu)償元件的(de)成因、性質及對其進行(xing)的(de)補(bu)償

采(cai)用(yong)電(dian)(dian)力半導體(ti)器(qi)件作為電(dian)(dian)容器(qi)組(zu)的(de)投切開關，較常采(cai)用(yong)的(de)接(jie)線方式如圖(tu)2。圖(tu)中BK為半導體(ti)器(qi)件，C1為電(dian)(dian)容器(qi)組(zu)。這種接(jie)線方式采(cai)用(yong)2組(zu)開關，另一相(xiang)直(zhi)接(jie)接(jie)電(dian)(dian)網(wang)省去(qu)一組(zu)開關，有(you)(you)很多優越性(xing)。動態補償的(de)補償效(xiao)果還(huan)(huan)要(yao)(yao)看控(kong)制器(qi)是否有(you)(you)較高(gao)的(de)性(xing)能(neng)及(ji)參數，還(huan)(huan)有(you)(you)很重要(yao)(yao)的(de)一項(xiang)就(jiu)是要(yao)(yao)求控(kong)制器(qi)要(yao)(yao)有(you)(you)良好的(de)動態響(xiang)應(ying)時間，準確的(de)投切功率，還(huan)(huan)要(yao)(yao)有(you)(you)較高(gao)的(de)自識別能(neng)力，這樣才(cai)能(neng)達到(dao) 佳的(de)補償效(xiao)果。

投(tou)入相(xiang)(xiang)(xiang)應的(de)單相(xiang)(xiang)(xiang)電(dian)(dian)(dian)(dian)容(rong)(rong)器(qi)(qi)后，三相(xiang)(xiang)(xiang)的(de)電(dian)(dian)(dian)(dian)流都有(you)所減(jian)小，三相(xiang)(xiang)(xiang)間的(de)不平(ping)衡程(cheng)度沒有(you)變化，未投(tou)電(dian)(dian)(dian)(dian)容(rong)(rong)器(qi)(qi)前(qian)C相(xiang)(xiang)(xiang)與A相(xiang)(xiang)(xiang)的(de)電(dian)(dian)(dian)(dian)流比(bi)電(dian)(dian)(dian)(dian)容(rong)(rong)器(qi)(qi)為2:1，投(tou)入電(dian)(dian)(dian)(dian)容(rong)(rong)器(qi)(qi)后C相(xiang)(xiang)(xiang)與A相(xiang)(xiang)(xiang)的(de)電(dian)(dian)(dian)(dian)流比(bi)仍然(ran)是2:1。投(tou)入電(dian)(dian)(dian)(dian)容(rong)(rong)器(qi)(qi)后的(de)零線電(dian)(dian)(dian)(dian)流減(jian)小，這是因為零線中的(de)不平(ping)衡無(wu)功(gong)電(dian)(dian)(dian)(dian)流被消除掉了，只剩下不平(ping)衡的(de)有(you)功(gong)電(dian)(dian)(dian)(dian)流部(bu)分(fen)(fen)。從此(ci)例可(ke)以看出，在三相(xiang)(xiang)(xiang)電(dian)(dian)(dian)(dian)流嚴重不平(ping)衡的(de)系統中應用時，單相(xiang)(xiang)(xiang)電(dian)(dian)(dian)(dian)容(rong)(rong)器(qi)(qi)分(fen)(fen)相(xiang)(xiang)(xiang)投(tou)切的(de)補償裝(zhuang)置比(bi)三相(xiang)(xiang)(xiang)電(dian)(dian)(dian)(dian)容(rong)(rong)器(qi)(qi)同時投(tou)切的(de)補償裝(zhuang)置的(de)使用效果要好一些。