為了改善由于電網的功率因數低以及這些不利的電源生產因數而導致的能量浪費,必須有效地提高電網的功率因數。顯然,由發電機提供這些無功功率并長距離傳輸是不合理的,通常是不可能的。合理的方法是在需要無功功率的地方產生無功功率,即增加無功功率補償設備。
電力系統中的大多數負載類型是感應負載。另外,電力用戶通常廣泛使用電力電子設備,這使得電網的功率因數較低。較低的功率因數會降低設備利用率,增加電源投資,損壞電壓質量,縮短設備使用壽命并大大增加線路損耗。因此,通過將電容補償柜連接到電力系統中,可以平衡感性負載,可以提高功率因數,并且可以提高設備的利用率。
一般而言,低壓補償電容柜由柜體,母線,熔斷器,隔離開關熔斷器組,電容器接觸器,避雷器,電容器,電抗器,一次,二次線,接線端子,功率因數自動補償控制裝置,面板組成,儀器和其他組件。
其基本原理:在實際的(de)(de)電(dian)(dian)(dian)源(yuan)系統中(zhong),大多(duo)數負載是異步電(dian)(dian)(dian)動機(ji)。等效電(dian)(dian)(dian)路(lu)可以看作是電(dian)(dian)(dian)阻和電(dian)(dian)(dian)感的(de)(de)串聯(lian)(lian)電(dian)(dian)(dian)路(lu),電(dian)(dian)(dian)壓和電(dian)(dian)(dian)流(liu)之(zhi)間的(de)(de)相(xiang)位(wei)差(cha)大,功(gong)率(lv)因(yin)數低。電(dian)(dian)(dian)容器(qi)并聯(lian)(lian)后,電(dian)(dian)(dian)容器(qi)的(de)(de)電(dian)(dian)(dian)流(liu)將抵消一部分電(dian)(dian)(dian)感電(dian)(dian)(dian)流(liu),從而使電(dian)(dian)(dian)感電(dian)(dian)(dian)流(liu)減小(xiao),總電(dian)(dian)(dian)流(liu)相(xiang)應(ying)減小(xiao),電(dian)(dian)(dian)壓和電(dian)(dian)(dian)流(liu)之(zhi)間的(de)(de)相(xiang)位(wei)差(cha)變小(xiao),從而提高了功(gong)率(lv)因(yin)數。
希拓電氣STT-STMP低壓無功補償柜是用(yong)于(yu)補償感性負荷(he)所需要的無(wu)功功率的裝置。該裝置對于(yu)提(ti)(ti)高系統(tong)的功率因(yin)數,改善電(dian)(dian)能(neng)質(zhi)量,延長電(dian)(dian)力設備(bei)使(shi)用(yong)壽命(ming),降低(di)(di)電(dian)(dian)網(wang)傳輸(shu)損耗,抑制電(dian)(dian)壓波動具有重要作用(yong)。提(ti)(ti)高了(le)系統(tong)的功率因(yin)數,降低(di)(di)了(le)線路中的無(wu)功電(dian)(dian)流,充分響應(ying)了(le)國(guo)家環保節能(neng)的號(hao)召;同時幫(bang)助用(yong)戶解決了(le)用(yong)電(dian)(dian)罰款的擔(dan)憂。