在(zai)我國(guo)對電(dian)網系(xi)統進(jin)行建設的(de)(de)過程里(li)，無功(gong)補償的(de)(de)容量(liang)不(bu)(bu)充足以及電(dian)網配備的(de)(de)不(bu)(bu)合理不(bu)(bu)科(ke)學(xue)是現在(zai)所發現的(de)(de)一個 難解決(jue)的(de)(de)問題，尤其是無功(gong)補償的(de)(de)容量(liang)不(bu)(bu)充足這一點尤為嚴重。在(zai)這種(zhong)應用中(zhong)考慮熔斷器(qi)保護時，應該(gai)把電(dian)容器(qi)和串(chuan)聯(lian)電(dian)抗器(qi)作為一個整(zheng)體(ti)來(lai)分(fen)析，因為補償回路中(zhong)除(chu)了要承載正常的(de)(de)基(ji)波(bo)無功(gong)電(dian)流(liu)外，還應該(gai)允許(xu)它能夠(gou)承載一定量(liang)的(de)(de)諧波(bo)電(dian)流(liu)。

諧(xie)波(bo)嚴(yan)重場合無功補償補償原理(li)與優缺點

對具有(you)多段(duan)串(chuan)聯的(de)電(dian)(dian)容(rong)器組，在(zai)(zai)人接(jie)觸之(zhi)前還應將串(chuan)聯段(duan)連接(jie)點(dian)對地短路(lu)放(fang)(fang)電(dian)(dian)。電(dian)(dian)容(rong)器如果是內(nei)部斷(duan)線，熔絲熔斷(duan)或(huo)引(yin)線接(jie)觸不良，其(qi)兩極間還可(ke)能(neng)有(you)殘余(yu)電(dian)(dian)荷，這樣在(zai)(zai)自動放(fang)(fang)電(dian)(dian)或(huo)人工放(fang)(fang)電(dian)(dian)時，它(ta)的(de)殘余(yu)電(dian)(dian)荷是不會被放(fang)(fang)掉的(de)。所以，運行或(huo)檢修人員(yuan)在(zai)(zai)接(jie)觸故(gu)障電(dian)(dian)容(rong)器前，還應戴好絕緣手套，用短路(lu)線短接(jie)故(gu)障電(dian)(dian)容(rong)器的(de)兩極，使(shi)其(qi)放(fang)(fang)電(dian)(dian)。

并且，這種能是在(zai)電(dian)(dian)(dian)(dian)(dian)網(wang)中與電(dian)(dian)(dian)(dian)(dian)能進行周期性轉換，這部分(fen)功率稱為無功功率，如電(dian)(dian)(dian)(dian)(dian)磁(ci)元(yuan)件(jian)建立磁(ci)場(chang)占用的電(dian)(dian)(dian)(dian)(dian)能，電(dian)(dian)(dian)(dian)(dian)容(rong)器建立電(dian)(dian)(dian)(dian)(dian)場(chang)所(suo)占的電(dian)(dian)(dian)(dian)(dian)能.電(dian)(dian)(dian)(dian)(dian)流(liu)在(zai)電(dian)(dian)(dian)(dian)(dian)感元(yuan)件(jian)中作功時，電(dian)(dian)(dian)(dian)(dian)流(liu)滯(zhi)后于(yu)電(dian)(dian)(dian)(dian)(dian)壓90°。而(er)電(dian)(dian)(dian)(dian)(dian)流(liu)在(zai)電(dian)(dian)(dian)(dian)(dian)容(rong)元(yuan)件(jian)中作功時，電(dian)(dian)(dian)(dian)(dian)流(liu)超前(qian)電(dian)(dian)(dian)(dian)(dian)壓90°。在(zai)同(tong)一電(dian)(dian)(dian)(dian)(dian)路中，電(dian)(dian)(dian)(dian)(dian)感電(dian)(dian)(dian)(dian)(dian)流(liu)與電(dian)(dian)(dian)(dian)(dian)容(rong)電(dian)(dian)(dian)(dian)(dian)流(liu)方(fang)向相反，互差180°。如果在(zai)電(dian)(dian)(dian)(dian)(dian)磁(ci)元(yuan)件(jian)電(dian)(dian)(dian)(dian)(dian)路中有比例地安裝電(dian)(dian)(dian)(dian)(dian)容(rong)元(yuan)件(jian)，使兩者的電(dian)(dian)(dian)(dian)(dian)流(liu)相互抵(di)消，使電(dian)(dian)(dian)(dian)(dian)流(liu)的矢(shi)(shi)量與電(dian)(dian)(dian)(dian)(dian)壓矢(shi)(shi)量之(zhi)間的夾(jia)角縮(suo)小，就(jiu)能達到(dao)無功補償的目的。