電網中的大多數電氣負載，例如電動機，變壓器，熒光燈和電弧爐，都是感應負載。這些電感設備不僅需要在運行期間吸收電力系統的有功功率，而且還需要吸收無功功率。因此，在將并聯電容器電力變壓器無功補償安(an)裝(zhuang)到電(dian)(dian)網中之后，它將能夠補(bu)償感性負(fu)載消耗的無(wu)(wu)功(gong)(gong)(gong)(gong)(gong)功(gong)(gong)(gong)(gong)(gong)率(lv)(lv)，并(bing)減少電(dian)(dian)網向感性負(fu)載提供并(bing)通(tong)過電(dian)(dian)網傳(chuan)輸的無(wu)(wu)功(gong)(gong)(gong)(gong)(gong)功(gong)(gong)(gong)(gong)(gong)率(lv)(lv)。由于功(gong)(gong)(gong)(gong)(gong)率(lv)(lv)因(yin)(yin)數(shu)改善的根本原因(yin)(yin)在于無(wu)(wu)功(gong)(gong)(gong)(gong)(gong)功(gong)(gong)(gong)(gong)(gong)率(lv)(lv)的減少，因(yin)(yin)此功(gong)(gong)(gong)(gong)(gong)率(lv)(lv)因(yin)(yin)數(shu)補(bu)償通(tong)常(chang)稱(cheng)為無(wu)(wu)功(gong)(gong)(gong)(gong)(gong)功(gong)(gong)(gong)(gong)(gong)率(lv)(lv)補(bu)償。

電力變壓器無功補償在改善供電(dian)(dian)(dian)(dian)系(xi)統(tong)中電(dian)(dian)(dian)(dian)網(wang)(wang)的功率因數，減(jian)少(shao)供電(dian)(dian)(dian)(dian)變(bian)壓(ya)器(qi)和(he)輸電(dian)(dian)(dian)(dian)線(xian)路(lu)的損耗(hao)(hao)，提高(gao)供電(dian)(dian)(dian)(dian)效率以(yi)及(ji)改善供電(dian)(dian)(dian)(dian)環境方面發揮著作用。合理選擇補償裝置可(ke)以(yi)最(zui)大程(cheng)度地減(jian)少(shao)電(dian)(dian)(dian)(dian)網(wang)(wang)損耗(hao)(hao)，提高(gao)電(dian)(dian)(dian)(dian)網(wang)(wang)質量。相反(fan)，選擇或使用不當可(ke)能會導致(zhi)許多(duo)因素，例如電(dian)(dian)(dian)(dian)源系(xi)統(tong)，電(dian)(dian)(dian)(dian)壓(ya)波(bo)(bo)動和(he)諧波(bo)(bo)增加。

電力變壓器無功補償的(de)(de)(de)作用就時提(ti)(ti)供電源質量(liang)和(he)功率因數。減少電力損失，根(gen)據不同(tong)的(de)(de)(de)線路(lu)和(he)負(fu)載情況，工廠內的(de)(de)(de)配電可以通過增加電容器的(de)(de)(de)功率因數來(lai)降(jiang)低(di)電源端和(he)功耗(hao)端的(de)(de)(de)功率損耗(hao)。延長(chang)設備壽(shou)命，功率因數提(ti)(ti)高之后，線路(lu)總電流(liu)將(jiang)(jiang)會(hui)降(jiang)低(di)，接(jie)近或者已經飽和(he)的(de)(de)(de)變壓器、開(kai)關等機械設備的(de)(de)(de)容量(liang)負(fu)荷將(jiang)(jiang)會(hui)降(jiang)低(di)，從而降(jiang)低(di)溫(wen)度，延長(chang)使用壽(shou)命。

無功功率：一種無功功率，用于交換電路中的電場和磁場，并用于建立和維持電氣設備中的磁場。它不執行外部工作，而是將其轉換為其他形式的能量。建立磁場時，所有帶有電磁線圈的電氣設備都會消耗無功功率。電力變壓器無功補償不起(qi)作用，但是為了確保(bao)有功功率(lv)的(de)傳導，必須首先(xian)滿足電網的(de)無功功率(lv)。

電動機、變壓器杜絕輕載運行。針對負荷小于40%額定功率的電動機，云南變壓器無功補償在滿足其啟動(dong)條(tiao)件和穩定工作等硬(ying)性條(tiao)件下，可以(yi)更(geng)換小容(rong)量的(de)電機(ji)，或者將電動(dong)機(ji)接線采用星型接法。針(zhen)對(dui)平均(jun)負荷(he)小于30%的(de)變壓器，可以(yi)更(geng)換成(cheng)小容(rong)量的(de)變壓器，或者調(diao)整參數負荷(he)。

電力變壓器無功補償一般來說客戶的第一反應并不是控制板的難題，一般會認為是交流接觸器的品質不合格，只把交流接觸器換了再次應用，顯而易見是沒有處理壓根難題的。云南變壓器無功補償已過一段時間以(yi)后發覺交(jiao)流接觸(chu)(chu)器又壞了，要是沒有(you)想起是由于投切經(jing)常造成的(de)交(jiao)流接觸(chu)(chu)器毀壞，這(zhe)類就(jiu)全靠拆(chai)換交(jiao)流接觸(chu)(chu)器湊合(he)再次應用。