我國電(dian)(dian)(dian)(dian)(dian)價(jia)政策規定(ding)，所有用(yong)(yong)電(dian)(dian)(dian)(dian)(dian)設(she)備(bei)容(rong)(rong)(rong)量超過(guo)100kV的用(yong)(yong)戶。甲(千瓦(wa))應按電(dian)(dian)(dian)(dian)(dian)價(jia)調(diao)整電(dian)(dian)(dian)(dian)(dian)費，電(dian)(dian)(dian)(dian)(dian)價(jia)低于規定(ding)值(zhi)的要罰款。已經說過(guo)，無功補(bu)償(chang)可以提(ti)高電(dian)(dian)(dian)(dian)(dian)價(jia)，減(jian)少或避免(mian)因電(dian)(dian)(dian)(dian)(dian)價(jia)低而(er)產生的電(dian)(dian)(dian)(dian)(dian)費，從而(er)節省電(dian)(dian)(dian)(dian)(dian)費。低壓單獨補(bu)償(chang)是指根據單個電(dian)(dian)(dian)(dian)(dian)氣設(she)備(bei)的無功功率需求(qiu)，將(jiang)一個或多個低壓電(dian)(dian)(dian)(dian)(dian)容(rong)(rong)(rong)器(qi)組(zu)與電(dian)(dian)(dian)(dian)(dian)氣設(she)備(bei)分散并聯。它通過(guo)控制和保護裝(zhuang)置與電(dian)(dian)(dian)(dian)(dian)氣設(she)備(bei)共用(yong)(yong)一套斷路器(qi)，同時與電(dian)(dian)(dian)(dian)(dian)機(ji)共用(yong)(yong)開(kai)關。隨(sui)機(ji)補(bu)償(chang)適用(yong)(yong)于補(bu)償(chang)個別大容(rong)(rong)(rong)量、并網運行(如大中型異(yi)步電(dian)(dian)(dian)(dian)(dian)動機(ji))的無功功率消耗，主要是補(bu)償(chang)勵磁無功功率。

汽車生產線補償模組經濟(ji)效益分析

對(dui)于投切次數(shu)甚少的(de)電容(rong)器組，按(an)我國移相電容(rong)器機械(xie)行業標準《電熱電容(rong)器移相電容(rong)器》JB 1629—75中(zhong)A.5.3條規定的(de)次數(shu)為每年允許不超過1000次，在(zai)這(zhe)些情況下都宜采用手動投切的(de)無功功率補償裝(zhuang)置。當無法取(qu)得無功功率曲線(xian)時，可按(an)條文(wen)中(zhong)提供的(de)常用公式計算無功補償容(rong)量(liang)。

配(pei)(pei)網(wang)無(wu)功(gong)(gong)(gong)補(bu)(bu)償配(pei)(pei)置(zhi)(zhi)的(de)(de)(de)基本原則：　第三條電(dian)(dian)力系統配(pei)(pei)置(zhi)(zhi)的(de)(de)(de)無(wu)功(gong)(gong)(gong)補(bu)(bu)償裝置(zhi)(zhi)應(ying)能確保在(zai)系統有(you)功(gong)(gong)(gong)負(fu)荷高峰和負(fu)荷低谷運行方式下，分(fen)(fen)（電(dian)(dian)壓(ya)(ya)(ya)）層和分(fen)(fen)（供電(dian)(dian)）區的(de)(de)(de)無(wu)功(gong)(gong)(gong)平衡(heng)。分(fen)(fen)（電(dian)(dian)壓(ya)(ya)(ya)）層無(wu)功(gong)(gong)(gong)平衡(heng)的(de)(de)(de)重(zhong)點是220kV及以(yi)上(shang)電(dian)(dian)壓(ya)(ya)(ya)等級層面(mian)的(de)(de)(de)無(wu)功(gong)(gong)(gong)平衡(heng)，分(fen)(fen)（供電(dian)(dian)）區平衡(heng)的(de)(de)(de)重(zhong)點是110kV及以(yi)下配(pei)(pei)電(dian)(dian)系統的(de)(de)(de)無(wu)功(gong)(gong)(gong)平衡(heng)。無(wu)功(gong)(gong)(gong)補(bu)(bu)償配(pei)(pei)置(zhi)(zhi)應(ying)根(gen)據電(dian)(dian)網(wang)情況，實施(shi)分(fen)(fen)散補(bu)(bu)償與(yu)變電(dian)(dian)站集中(zhong)補(bu)(bu)償相結(jie)合，電(dian)(dian)網(wang)補(bu)(bu)償與(yu)用戶(hu)補(bu)(bu)償相結(jie)合，高壓(ya)(ya)(ya)補(bu)(bu)償與(yu)低壓(ya)(ya)(ya)補(bu)(bu)償相結(jie)合，滿足(zu)降損和調壓(ya)(ya)(ya)的(de)(de)(de)需要。