想要知道電氣設備為什么要進行無功補償，首先我(wo)們要知(zhi)道什么(me)叫(jiao)無(wu)功補償(chang)。
無功補償 ，是一種在電力供(gong)電系統(tong)中起(qi)提(ti)高電網的(de)功率因數的(de)作用，降低(di)供(gong)電變壓器及輸送線路的(de)損耗，提(ti)高供(gong)電效率，改善供(gong)電環(huan)境(jing)的(de)技(ji)術。
絕大多(duo)數電(dian)氣設備在運(yun)行(xing)時需要無功和有(you)功。
有功(gong)功(gong)率(lv)：直接消耗電能，把電能轉變(bian)為機械能、熱能、化學能或(huo)聲能，利用這些能作功(gong)，這部(bu)分功(gong)率(lv)稱為有功(gong)功(gong)率(lv);
無功功率：消耗電能(neng)(neng)，但只是把電能(neng)(neng)轉換(huan)為另一種形式的能(neng)(neng)，這(zhe)種能(neng)(neng)作為電氣(qi)設備能(neng)(neng)夠作功的必(bi)備條件，并且，這(zhe)種能(neng)(neng)是在電網中(zhong)與電能(neng)(neng)進行周期性轉換(huan)，這(zhe)部分功率稱為無功功率。
有功(gong)功(gong)率的(de)(de)平(ping)(ping)方+無功(gong)功(gong)率的(de)(de)平(ping)(ping)方=視在功(gong)率的(de)(de)平(ping)(ping)方，是一個三角函數的(de)(de)關系(xi)。
功率因數=有(you)功功率/視在功率，即(ji)cosΦ=P/S ，而功率因數是衡量電氣設備(bei)效率高低(di)的一(yi)個系(xi)數。
在(zai)一定的(de)有功(gong)(gong)功(gong)(gong)率下，功(gong)(gong)率因數低(di)，說(shuo)明電(dian)路用(yong)于交變磁場轉換(huan)的(de)無功(gong)(gong)功(gong)(gong)率大(da)，電(dian)能(neng)損(sun)失越大(da)，因此供(gong)電(dian)部門對(dui)用(yong)電(dian)單位的(de)功(gong)(gong)率因數有一定的(de)標(biao)準要求(qiu)。
電(dian)(dian)網(wang)中(zhong)的(de)(de)電(dian)(dian)力(li)(li)負(fu)(fu)荷(he)，如電(dian)(dian)動機(ji)、變(bian)壓器(qi)(qi)、日光燈及(ji)(ji)電(dian)(dian)弧爐等，大多屬于(yu)(yu)電(dian)(dian)感性負(fu)(fu)荷(he)，這(zhe)些電(dian)(dian)感性的(de)(de)設(she)(she)備在(zai)運(yun)行過程中(zhong)不(bu)僅需(xu)要(yao)向(xiang)電(dian)(dian)力(li)(li)系統(tong)吸(xi)收有功(gong)(gong)(gong)(gong)(gong)功(gong)(gong)(gong)(gong)(gong)率(lv)(lv)，還同時吸(xi)收無(wu)(wu)功(gong)(gong)(gong)(gong)(gong)功(gong)(gong)(gong)(gong)(gong)率(lv)(lv)。因(yin)此在(zai)電(dian)(dian)網(wang)中(zhong)安裝并(bing)聯電(dian)(dian)容器(qi)(qi)無(wu)(wu)功(gong)(gong)(gong)(gong)(gong)補(bu)償(chang)(chang)(chang)設(she)(she)備后，將可以提供補(bu)償(chang)(chang)(chang)感性負(fu)(fu)荷(he)所消耗的(de)(de)無(wu)(wu)功(gong)(gong)(gong)(gong)(gong)功(gong)(gong)(gong)(gong)(gong)率(lv)(lv)，減少(shao)了(le)電(dian)(dian)網(wang)電(dian)(dian)源側向(xiang)感性負(fu)(fu)荷(he)提供及(ji)(ji)由(you)線路(lu)輸(shu)送的(de)(de)無(wu)(wu)功(gong)(gong)(gong)(gong)(gong)功(gong)(gong)(gong)(gong)(gong)率(lv)(lv)。由(you)于(yu)(yu)減少(shao)了(le)無(wu)(wu)功(gong)(gong)(gong)(gong)(gong)功(gong)(gong)(gong)(gong)(gong)率(lv)(lv)在(zai)電(dian)(dian)網(wang)中(zhong)的(de)(de)流動，因(yin)此可以降低輸(shu)配電(dian)(dian)線路(lu)中(zhong)變(bian)壓器(qi)(qi)及(ji)(ji)母線因(yin)輸(shu)送無(wu)(wu)功(gong)(gong)(gong)(gong)(gong)功(gong)(gong)(gong)(gong)(gong)率(lv)(lv)造成的(de)(de)電(dian)(dian)能損(sun)耗，這(zhe)就(jiu)是無(wu)(wu)功(gong)(gong)(gong)(gong)(gong)補(bu)償(chang)(chang)(chang)的(de)(de)效益。 無(wu)(wu)功(gong)(gong)(gong)(gong)(gong)補(bu)償(chang)(chang)(chang)的(de)(de)主要(yao)目(mu)的(de)(de)就(jiu)是提升補(bu)償(chang)(chang)(chang)系統(tong)的(de)(de)功(gong)(gong)(gong)(gong)(gong)率(lv)(lv)因(yin)數。
通過以上的(de)介(jie)紹(shao)，我們知(zhi)道(dao)了安裝無(wu)功(gong)補償設(she)備的(de)重要性(xing)，選(xuan)擇無(wu)功(gong)補償設(she)備，一(yi)定要選(xuan)擇正規(gui)、合(he)格(ge)的(de)產品。
希拓電(dian)(dian)氣(qi)專(zhuan)注解(jie)決(jue)電(dian)(dian)網中的無功補償(chang)問題，為(wei)用戶(hu)提(ti)供合理的解(jie)決(jue)方案。
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