當電(dian)力系統中的負載具有儲能(neng)元件的時候，就(jiu)會(hui)有無功功率產生，像電(dian)容、電(dian)感都是(shi)使(shi)用普遍的儲能(neng)元件。電(dian)阻(zu)負載消耗的有功功率將電(dian)能(neng)轉(zhuan)(zhuan)換(huan)成(cheng)為(wei)熱(re)能(neng)，或者(zhe)進一(yi)(yi)步轉(zhuan)(zhuan)換(huan)成(cheng)其他(ta)形式。而電(dian)感和電(dian)容并不實際消耗能(neng)量，在(zai)一(yi)(yi)個周期(qi)內會(hui)先將電(dian)能(neng)轉(zhuan)(zhuan)換(huan)成(cheng)磁場能(neng)儲存(cun)起來，再釋放出來，返回電(dian)源。

醫院配電系(xi)統無功補償經濟效(xiao)益分析

a)供電(dian)(dian)(dian)(dian)網(wang)的(de)(de)(de)(de)電(dian)(dian)(dian)(dian)壓(ya)(ya)水平Vs；b)串(chuan)聯電(dian)(dian)(dian)(dian)抗器(qi)(qi)帶(dai)來的(de)(de)(de)(de)壓(ya)(ya)升。由電(dian)(dian)(dian)(dian)工學(xue)原理可知(zhi)，當電(dian)(dian)(dian)(dian)容(rong)器(qi)(qi)與(yu)電(dian)(dian)(dian)(dian)抗器(qi)(qi)組成(cheng)串(chuan)聯回路再接入電(dian)(dian)(dian)(dian)網(wang)時(shi)，電(dian)(dian)(dian)(dian)容(rong)器(qi)(qi)兩端的(de)(de)(de)(de)電(dian)(dian)(dian)(dian)壓(ya)(ya)會(hui)高于電(dian)(dian)(dian)(dian)網(wang)電(dian)(dian)(dian)(dian)壓(ya)(ya)，其升高幅(fu)度(du)由串(chuan)聯電(dian)(dian)(dian)(dian)抗器(qi)(qi)的(de)(de)(de)(de)電(dian)(dian)(dian)(dian)抗率(lv)(P)決定：Uc=U/(1-P)；c)背景諧波(bo)(bo)電(dian)(dian)(dian)(dian)壓(ya)(ya)帶(dai)來的(de)(de)(de)(de)壓(ya)(ya)升。當電(dian)(dian)(dian)(dian)容(rong)器(qi)(qi)在含有諧波(bo)(bo)的(de)(de)(de)(de)環境(jing)下工作(zuo)時(shi)，諧波(bo)(bo)電(dian)(dian)(dian)(dian)壓(ya)(ya)將疊加到電(dian)(dian)(dian)(dian)容(rong)器(qi)(qi)的(de)(de)(de)(de)基(ji)波(bo)(bo)電(dian)(dian)(dian)(dian)壓(ya)(ya)上，使電(dian)(dian)(dian)(dian)容(rong)器(qi)(qi)的(de)(de)(de)(de)實際電(dian)(dian)(dian)(dian)壓(ya)(ya)升高。諧波(bo)(bo)電(dian)(dian)(dian)(dian)壓(ya)(ya)至少應考慮V0=0．5％Vs，V5=5％Vs，V7=5％Vs(低(di)壓(ya)(ya))。

安全(quan)性：內(nei)裝自(zi)放(fang)電(dian)(dian)(dian)(dian)電(dian)(dian)(dian)(dian)阻(zu)和保險(xian)裝置。  內(nei)裝放(fang)電(dian)(dian)(dian)(dian)電(dian)(dian)(dian)(dian)阻(zu)能(neng)(neng)使電(dian)(dian)(dian)(dian)容器(qi)上所 帶的(de)電(dian)(dian)(dian)(dian)能(neng)(neng)自(zi)動泄放(fang)掉；當電(dian)(dian)(dian)(dian)容器(qi)發生故障(zhang)時(shi)，保險(xian)裝置能(neng)(neng)及時(shi)斷(duan)開(kai)電(dian)(dian)(dian)(dian)源，避免(mian)故障(zhang)的(de)進(jin)一步(bu)發展，確(que)保使用安全(quan)。不(bu)漏油：本(ben)電(dian)(dian)(dian)(dian)容器(qi)采用先進(jin)的(de)半固體(ti)浸(jin)漬劑，滴熔點(dian)高于70℃，在使用過程中不(bu)漏油，避免(mian)了環(huan)境污染(ran)，電(dian)(dian)(dian)(dian)容器(qi)也不(bu)會因失油而失效。