無功(gong)功(gong)率(lv)單獨就地(di)補(bu)償就是(shi)將電容(rong)器(qi)安裝在電氣設(she)備的(de)(de)附近，可以(yi) 大限度地(di)減少線(xian)損和(he)(he)釋放系統容(rong)量，在某些情(qing)況下(xia)還可以(yi)縮小(xiao)饋電線(xian)路的(de)(de)截面(mian)積，減少有(you)色金屬消耗。但電容(rong)器(qi)的(de)(de)利用(yong)率(lv)往(wang)往(wang)不高，初次投資及維護(hu)費用(yong)增加。從(cong)提高電容(rong)器(qi)的(de)(de)利用(yong)率(lv)和(he)(he)避免遭(zao)致(zhi)損壞的(de)(de)觀點出發，宜用(yong)于以(yi)下(xia)范圍：

光(guang)纖無功補償(chang)(chang)柜不(bu)補償(chang)(chang)的原因

串聯電抗器(qi)主要用(yong)于提高(gao)0.4kV電力系統的(de)功(gong)(gong)率因(yin)數，有效抑(yi)制電網(wang)的(de)高(gao)次諧波(bo)(bo)，減輕(qing)電容(rong)器(qi)由諧波(bo)(bo)引起的(de)過(guo)載(zai)，防止諧波(bo)(bo)放大(da)，對(dui)電容(rong)器(qi)的(de)安全運行(xing)，改善網(wang)絡(luo)電壓(ya)波(bo)(bo)形，提高(gao)供電質量和電網(wang)安全經濟運行(xing)起良好作(zuo)用(yong)，適用(yong)于3.、5、7、9次諧波(bo)(bo)負載(zai)的(de)無功(gong)(gong)補償及(ji)濾波(bo)(bo)作(zuo)用(yong)。

根據(ju)《全國供(gong)用(yong)(yong)(yong)電(dian)(dian)(dian)規則》和(he)《電(dian)(dian)(dian)力(li)系統電(dian)(dian)(dian)壓(ya)(ya)(ya)和(he)無功(gong)(gong)電(dian)(dian)(dian)力(li)技術導(dao)則》，均要求(qiu)電(dian)(dian)(dian)力(li)用(yong)(yong)(yong)戶(hu)(hu)(hu)的功(gong)(gong)率因數應達到(dao)下列規定(ding)：高(gao)(gao)壓(ya)(ya)(ya)供(gong)電(dian)(dian)(dian)的工業用(yong)(yong)(yong)戶(hu)(hu)(hu)和(he)高(gao)(gao)壓(ya)(ya)(ya)供(gong)電(dian)(dian)(dian)裝有帶負荷調(diao)整電(dian)(dian)(dian)壓(ya)(ya)(ya)裝置(zhi)的電(dian)(dian)(dian)力(li)用(yong)(yong)(yong)戶(hu)(hu)(hu)，其(qi)用(yong)(yong)(yong)戶(hu)(hu)(hu)交接點(dian)處(chu)的功(gong)(gong)率因數為0.9以(yi)上(shang)；其(qi)他100kV·A(kW)及以(yi)上(shang)電(dian)(dian)(dian)力(li)用(yong)(yong)(yong)戶(hu)(hu)(hu)和(he)大、中(zhong)(zhong)型電(dian)(dian)(dian)力(li)排灌站(zhan)，其(qi)用(yong)(yong)(yong)戶(hu)(hu)(hu)交接點(dian)處(chu)的功(gong)(gong)率因數為0.85以(yi)上(shang)。而(er)《國家電(dian)(dian)(dian)網公司電(dian)(dian)(dian)力(li)系統無功(gong)(gong)補償配(pei)置(zhi)技術原則》中(zhong)(zhong)則規定(ding)：100kV·A及以(yi)上(shang)高(gao)(gao)壓(ya)(ya)(ya)供(gong)電(dian)(dian)(dian)的電(dian)(dian)(dian)力(li)用(yong)(yong)(yong)戶(hu)(hu)(hu)，在(zai)用(yong)(yong)(yong)戶(hu)(hu)(hu)高(gao)(gao)峰時變壓(ya)(ya)(ya)器高(gao)(gao)壓(ya)(ya)(ya)側功(gong)(gong)率因數不(bu)宜低(di)于0.95；其(qi)他電(dian)(dian)(dian)力(li)用(yong)(yong)(yong)戶(hu)(hu)(hu)，功(gong)(gong)率因數不(bu)宜低(di)于0.90。