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發(fa)(fa)電(dian)(dian)(dian)(dian)機(ji)(ji)(ji)(ji)(ji)正(zheng)常(chang)運(yun)(yun)行(xing)時(shi)(shi),向系(xi)統提(ti)供有功(gong)的(de)(de)同時(shi)(shi)還提(ti)供無功(gong),定(ding)子(zi)電(dian)(dian)(dian)(dian)流(liu)(liu)滯后(hou)于(yu)端(duan)電(dian)(dian)(dian)(dian)壓(ya)一個(ge)角(jiao)度,此(ci)種(zhong)(zhong)狀態即遲相(xiang)運(yun)(yun)行(xing).當逐漸減少(shao)勵磁電(dian)(dian)(dian)(dian)流(liu)(liu)使發(fa)(fa)電(dian)(dian)(dian)(dian)機(ji)(ji)(ji)(ji)(ji)從向系(xi)統提(ti)供無功(gong)而變為(wei)從系(xi)統吸收無功(gong),定(ding)子(zi)電(dian)(dian)(dian)(dian)流(liu)(liu)從滯后(hou)而變為(wei)超前發(fa)(fa)電(dian)(dian)(dian)(dian)機(ji)(ji)(ji)(ji)(ji)端(duan)電(dian)(dian)(dian)(dian)壓(ya)一個(ge)角(jiao)度,此(ci)種(zhong)(zhong)狀態即為(wei)發(fa)(fa)電(dian)(dian)(dian)(dian)機(ji)(ji)(ji)(ji)(ji)的(de)(de)進(jin)相(xiang)運(yun)(yun)行(xing)工況(kuang)。發(fa)(fa)電(dian)(dian)(dian)(dian)機(ji)(ji)(ji)(ji)(ji)進(jin)相(xiang)運(yun)(yun)行(xing)時(shi)(shi)各電(dian)(dian)(dian)(dian)氣參(can)數是(shi)對稱的(de)(de)，并且發(fa)(fa)電(dian)(dian)(dian)(dian)機(ji)(ji)(ji)(ji)(ji)仍保持同步轉速(su)，因而是(shi)屬于(yu)發(fa)(fa)電(dian)(dian)(dian)(dian)機(ji)(ji)(ji)(ji)(ji)正(zheng)常(chang)運(yun)(yun)行(xing)方式中功(gong)率因數變動(dong)時(shi)(shi)的(de)(de)一種(zhong)(zhong)運(yun)(yun)行(xing)工況(kuang)，只是(shi)拓寬(kuan)了發(fa)(fa)電(dian)(dian)(dian)(dian)機(ji)(ji)(ji)(ji)(ji)正(zheng)常(chang)的(de)(de)運(yun)(yun)行(xing)范圍。同樣，在允許的(de)(de)進(jin)相(xiang)運(yun)(yun)行(xing)限額范圍內，只要電(dian)(dian)(dian)(dian)網需(xu)要是(shi)可以長期運(yun)(yun)行(xing)的(de)(de)。