低(di)壓(ya)個(ge)別(bie)補償就是根據個(ge)別(bie)用電設(she)(she)備(bei)對無功的需要(yao)量(liang)將(jiang)單臺或(huo)多臺低(di)壓(ya)電容器(qi)組(zu)分(fen)散(san)地(di)與(yu)用電設(she)(she)備(bei)并接，它與(yu)用電設(she)(she)備(bei)共用一套斷路器(qi)，通過控制、保護(hu)裝(zhuang)置(zhi)與(yu)電機同(tong)時投(tou)(tou)切。隨機補償適(shi)用于補償個(ge)別(bie)大(da)容量(liang)且(qie)連接運(yun)(yun)行(如大(da)中型異步電動機)的無功消耗，以補勵(li)磁無功為主。低(di)壓(ya)個(ge)別(bie)補償的優點：用電設(she)(she)備(bei)運(yun)(yun)行時，無功補償投(tou)(tou)入，用電設(she)(she)備(bei)停動時，補償設(she)(she)備(bei)也退出，因(yin)此不會造成(cheng)無功倒送，具有投(tou)(tou)資少、占(zhan)位小(xiao)、安裝(zhuang)容易、配(pei)置(zhi)方便靈(ling)活(huo)、維護(hu)簡單、事故率低(di)等優點。

工廠補償模(mo)組經濟效益分析

與此同時，低壓動力客戶(hu)電量增(zeng)(zeng)長迅速(su)，近幾年(nian)已經(jing)(jing)占到了農村總用電量比重的60％～70％，主要以紡(fang)織行業、機械加(jia)工為主，而且動力客戶(hu)的用電量明顯呈(cheng)現(xian)出繼續增(zeng)(zeng)長趨勢。這(zhe)些動力客戶(hu)，其設備自然功(gong)率因數較低（COSφ＝0.6～0.7），且經(jing)(jing)常處于低功(gong)率因數運行狀況(kuang)。

因(yin)此，便需要找一種電(dian)(dian)(dian)(dian)(dian)(dian)器(qi)(qi)件接在(zai)線路(lu)(lu)(lu)上，這個器(qi)(qi)件在(zai)同(tong)一電(dian)(dian)(dian)(dian)(dian)(dian)源(yuan)下，所產生的電(dian)(dian)(dian)(dian)(dian)(dian)流(liu)(liu)與電(dian)(dian)(dian)(dian)(dian)(dian)感電(dian)(dian)(dian)(dian)(dian)(dian)流(liu)(liu)方向相反(fan)，可以用來抵消電(dian)(dian)(dian)(dian)(dian)(dian)感電(dian)(dian)(dian)(dian)(dian)(dian)流(liu)(liu)。這樣，既不影響電(dian)(dian)(dian)(dian)(dian)(dian)動機產生磁(ci)場，又能消除或減少線路(lu)(lu)(lu)上的電(dian)(dian)(dian)(dian)(dian)(dian)感電(dian)(dian)(dian)(dian)(dian)(dian)流(liu)(liu)，這種電(dian)(dian)(dian)(dian)(dian)(dian)容(rong)器(qi)(qi)便叫補償電(dian)(dian)(dian)(dian)(dian)(dian)容(rong)器(qi)(qi)，也叫電(dian)(dian)(dian)(dian)(dian)(dian)力電(dian)(dian)(dian)(dian)(dian)(dian)容(rong)器(qi)(qi),它在(zai)線路(lu)(lu)(lu)上的電(dian)(dian)(dian)(dian)(dian)(dian)流(liu)(liu)正好與電(dian)(dian)(dian)(dian)(dian)(dian)感電(dian)(dian)(dian)(dian)(dian)(dian)流(liu)(liu)相反(fan)。