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配(pei)網中壓串(chuan)補(bu)裝置主要用于(yu)提升(sheng)長距(ju)離配(pei)電(dian)(dian)線路(lu)（10kV、35kV、66kV等）的末端(duan)電(dian)(dian)壓，改善企業和居民用電(dian)(dian)質量。

中壓(ya)(ya)(ya)(ya)串補主(zhu)要用(yong)于(yu)長(chang)距離中壓(ya)(ya)(ya)(ya)配(pei)(pei)電(dian)(dian)(dian)(dian)線路(lu)。例(li)如35kV、10kV配(pei)(pei)電(dian)(dian)(dian)(dian)網絡中，由于(yu)偏遠地區用(yong)電(dian)(dian)(dian)(dian)負(fu)荷較小、且分散較遠，導(dao)致配(pei)(pei)電(dian)(dian)(dian)(dian)線路(lu)長(chang)度遠遠超出(chu)了常(chang)規(gui)送電(dian)(dian)(dian)(dian)半徑，此時配(pei)(pei)電(dian)(dian)(dian)(dian)線路(lu)末(mo)端(duan)(duan)電(dian)(dian)(dian)(dian)壓(ya)(ya)(ya)(ya)逐(zhu)漸跌落導(dao)致居民用(yong)電(dian)(dian)(dian)(dian)和工礦(kuang)企(qi)業(ye)負(fu)荷無法正常(chang)運(yun)轉。在(zai)此情況(kuang)下，常(chang)規(gui)并聯(lian)電(dian)(dian)(dian)(dian)容(rong)補償（柱上電(dian)(dian)(dian)(dian)容(rong)）或調(diao)(diao)壓(ya)(ya)(ya)(ya)變(bian)壓(ya)(ya)(ya)(ya)器（1：1可調(diao)(diao)壓(ya)(ya)(ya)(ya)變(bian)壓(ya)(ya)(ya)(ya)器）并不(bu)能從根本上解決(jue)問題，而且會隨著末(mo)端(duan)(duan)用(yong)電(dian)(dian)(dian)(dian)負(fu)荷的增(zeng)高而補償效(xiao)果急劇變(bian)差。中壓(ya)(ya)(ya)(ya)串補可以徹底解決(jue)上述問題，縮(suo)短等效(xiao)電(dian)(dian)(dian)(dian)氣距離，有效(xiao)提(ti)高線路(lu)末(mo)端(duan)(duan)??壓(ya)(ya)(ya)(ya)。

加裝中(zhong)壓(ya)串(chuan)補后的配電(dian)線(xian)(xian)路(lu)，其末端電(dian)壓(ya)無論輕載、重載，均(jun)保持(chi)在(zai)合格范圍內，保障偏遠地區(qu)配網(wang)末端用電(dian)正常。下圖是(shi)吉林延邊青溝子10kV配網(wang)（58km）送電(dian)線(xian)(xian)路(lu)電(dian)壓(ya)分布狀況，在(zai)加裝串(chuan)補后有了極大改善，且(qie)線(xian)(xian)損也顯著(zhu)降(jiang)低。