配電房為什么要使用配電補償箱？

答：提高功(gong)(gong)率(lv)(lv)(lv)(lv)因(yin)素的(de)(de)作用。打個(ge)比方，種子的(de)(de)發(fa)芽(ya)率(lv)(lv)(lv)(lv)，一百斤種子如(ru)果發(fa)芽(ya)率(lv)(lv)(lv)(lv)是百分之(zhi)九十五(wu)，那(nei)么還有(you)百分之(zhi)五(wu)沒有(you)用的(de)(de)，不能(neng)發(fa)芽(ya)，供電(dian)局為了(le)(le)提高電(dian)的(de)(de)利(li)用率(lv)(lv)(lv)(lv)，就(jiu)要(yao)求配電(dian)房使用電(dian)容(rong)補償，來提高功(gong)(gong)率(lv)(lv)(lv)(lv)因(yin)素，種子的(de)(de)發(fa)芽(ya)率(lv)(lv)(lv)(lv)就(jiu)好比功(gong)(gong)率(lv)(lv)(lv)(lv)因(yin)素，提高了(le)(le)功(gong)(gong)率(lv)(lv)(lv)(lv)因(yin)素，就(jiu)提高了(le)(le)電(dian)的(de)(de)利(li)用率(lv)(lv)(lv)(lv)，不至于能(neng)源(yuan)在使用時(shi)白白浪費。

配電室(shi)加入電容補償(chang)是為了進行(xing)無功補償(chang)，提高功率(lv)因數。

電(dian)力系(xi)統(tong)的(de)(de)用電(dian)設備在使用時會(hui)產生有功功率和(he)無功功率。有功功率把(ba)電(dian)能(neng)(neng)(neng)(neng)(neng)轉(zhuan)變為機械能(neng)(neng)(neng)(neng)(neng)、熱能(neng)(neng)(neng)(neng)(neng)、化學能(neng)(neng)(neng)(neng)(neng)或聲(sheng)能(neng)(neng)(neng)(neng)(neng)；無功功率把(ba)電(dian)能(neng)(neng)(neng)(neng)(neng)轉(zhuan)換為另一種形式的(de)(de)能(neng)(neng)(neng)(neng)(neng)，如電(dian)磁元件建立磁場(chang)占用的(de)(de)電(dian)能(neng)(neng)(neng)(neng)(neng)。

無功功率過大，會導致功率因數降低，供電變壓器及輸送線路的損耗增大，供電效率變低。因而國家對各變電站、重要負荷等電網節點的無功功率和功率因數有嚴格的規定。

為(wei)了(le)減少(shao)損耗，提(ti)高(gao)供電(dian)(dian)(dian)(dian)(dian)效(xiao)率，改(gai)善(shan)供電(dian)(dian)(dian)(dian)(dian)環境，需要進行(xing)無(wu)功補(bu)償(chang)。無(wu)功補(bu)償(chang)通(tong)過把(ba)具有容性功率負荷(he)的裝(zhuang)置(zhi)與感性功率負荷(he)并聯接在同一電(dian)(dian)(dian)(dian)(dian)路(lu)實現。電(dian)(dian)(dian)(dian)(dian)力系統用電(dian)(dian)(dian)(dian)(dian)設(she)備通(tong)常(chang)是感性的，故適當地(di)并聯電(dian)(dian)(dian)(dian)(dian)容即可實現無(wu)功補(bu)償(chang)。