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淺談靜止式進相器的無功補償作用及認識誤區

2019-09-26

靜止式進相器是(shi)在異(yi)步電(dian)(dian)(dian)(dian)(dian)(dian)動(dong)(dong)機(ji)(ji)正常運(yun)行后(hou)(hou),通過采(cai)集異(yi)步電(dian)(dian)(dian)(dian)(dian)(dian)動(dong)(dong)機(ji)(ji)轉(zhuan)(zhuan)子(zi)(zi)(zi)(zi)電(dian)(dian)(dian)(dian)(dian)(dian)流信號,經(jing)微處(chu)理器CPU處(chu)理后(hou)(hou)給可(ke)控硅晶閘(zha)管發(fa)出觸發(fa)信號,由可(ke)控硅晶閘(zha)管組成(cheng)的(de)(de)(de)交(jiao)一交(jiao)變流器將工頻(pin)(pin)電(dian)(dian)(dian)(dian)(dian)(dian)源變為和(he)電(dian)(dian)(dian)(dian)(dian)(dian)動(dong)(dong)機(ji)(ji)轉(zhuan)(zhuan)子(zi)(zi)(zi)(zi)電(dian)(dian)(dian)(dian)(dian)(dian)流同頻(pin)(pin)《率的(de)(de)(de)附加(jia)電(dian)(dian)(dian)(dian)(dian)(dian)勢(shi),加(jia)在電(dian)(dian)(dian)(dian)(dian)(dian)動(dong)(dong)機(ji)(ji)轉(zhuan)(zhuan)子(zi)(zi)(zi)(zi)回(hui)路中(zhong),改變轉(zhuan)(zhuan)子(zi)(zi)(zi)(zi)電(dian)(dian)(dian)(dian)(dian)(dian)流和(he)轉(zhuan)(zhuan)子(zi)(zi)(zi)(zi)電(dian)(dian)(dian)(dian)(dian)(dian)壓的(de)(de)(de)相位關系,進而通過磁場(chang)改變電(dian)(dian)(dian)(dian)(dian)(dian)動(dong)(dong)機(ji)(ji)定子(zi)(zi)(zi)(zi)電(dian)(dian)(dian)(dian)(dian)(dian)流和(he)定子(zi)(zi)(zi)(zi)電(dian)(dian)(dian)(dian)(dian)(dian)壓的(de)(de)(de)相位關系,減小功(gong)率因(yin)數(shu)(shu)(shu)角,提(ti)(ti)高電(dian)(dian)(dian)(dian)(dian)(dian)動(dong)(dong)機(ji)(ji)的(de)(de)(de)功(gong)率因(yin)數(shu)(shu)(shu)。定子(zi)(zi)(zi)(zi)電(dian)(dian)(dian)(dian)(dian)(dian)流下(xia)降,降低電(dian)(dian)(dian)(dian)(dian)(dian)動(dong)(dong)機(ji)(ji)自身銅(tong)損和(he)溫升,提(ti)(ti)高電(dian)(dian)(dian)(dian)(dian)(dian)動(dong)(dong)機(ji)(ji)的(de)(de)(de)過載(zai)能(neng)力,從而改善(shan)電(dian)(dian)(dian)(dian)(dian)(dian)動(dong)(dong)機(ji)(ji)的(de)(de)(de)運(yun)行丬(qiang)犬況。其在異(yi)步電(dian)(dian)(dian)(dian)(dian)(dian)動(dong)(dong)機(ji)(ji)無功(gong)功(gong)率補(bu)償時的(de)(de)(de)主要作用就是(shi)提(ti)(ti)高電(dian)(dian)(dian)(dian)(dian)(dian)動(dong)(dong)機(ji)(ji)的(de)(de)(de)功(gong)率因(yin)數(shu)(shu)(shu),并且只(zhi)能(neng)在異(yi)步電(dian)(dian)(dian)(dian)(dian)(dian)動(dong)(dong)機(ji)(ji)啟(qi)動(dong)(dong)完畢正常運(yun)轉(zhuan)(zhuan)時才能(neng)投入(ru)并起到無:功(gong)補(bu)償作用,而異(yi)步電(dian)(dian)(dian)(dian)(dian)(dian)動(dong)(dong)機(ji)(ji)啟(qi)動(dong)(dong)過程中(zhong)是(shi)不(bu)起任何補(bu)償作用的(de)(de)(de),這一點(dian)必須明確。提(ti)(ti)高功(gong)率因(yin)數(shu)(shu)(shu)主要有下(xia),列兩方面重要意義。

靜止式進(jin)相器在異(yi)步(bu)電(dian)(dian)動(dong)(dong)機(ji)(ji)無(wu)功(gong)功(gong)率補(bu)償(chang)時、雖然在降低異(yi)步(bu)電(dian)(dian)動(dong)(dong)機(ji)(ji)定子電(dian)(dian)流、提(ti)高(gao)電(dian)(dian)動(dong)(dong)機(ji)(ji)的功(gong)率因數方面有明(ming)顯效果,但也存在一定的認識(shi)炭區,尤其在節(jie)能節(jie)電(dian)(dian)量上有許多偏頗的觀(guan)點(dian)2·1觀(guan)點(dian)一大量節(jie)電(dian)(dian)節(jie)能

文獻(xian)卩]就堅持該觀點(dian),現摘(zhai)錄相(xiang)關(guan)內容如下

“進相(xiang)器(qi)的引入,對(dui)繞組溫度、電機電流及功率(lv)因(yin)數(shu)產生重大(da)影(ying)響,引入進相(xiang)器(qi)能(neng)夠(gou)大(da)量節能(neng):

(1)靜止式進相器應用(yong)對2號線磨主機(3550(W)的(de)電(dian)(dian)(dian)(dian)流(liu)影響及理論(lun)節(jie)能計算。不用(yong)進相(xiang)器(qi)時(shi),該磨主機電(dian)(dian)(dian)(dian)流(liu)為380A,進相(xiang)器(qi)投(tou)入后(hou)磨主機電(dian)(dian)(dian)(dian)流(liu)降為310A經按(an)每(mei)(mei)月(yue)30d,每(mei)(mei)天24h運行(xing),運行(xing)效(xiao)率(lv)為0.8計算,理論(lun)上(shang)磨主電(dian)(dian)(dian)(dian)I節(jie)約電(dian)(dian)(dian)(dian)有為:30d×24h×6000V×戽(hu)(380一(yi)310)A×L732/10()()×().8=424134.144kW·h;電(dian)(dian)(dian)(dian)價按(an)0.5元/(kW?h)計算,每(mei)(mei)月(yue)節(jie)電(dian)(dian)(dian)(dian)可達(da)21萬元以上(shang)。2007年進相(xiang)器(qi)投(tou)入及退(tui)出(chu)時(shi)的(de)實(shi)際生產數(shu)(shu)據(ju)比較見表(biao)L,顯然投(tou)入進相(xiang)器(qi)后(hou),功(gong)率(lv)因數(shu)(shu)提高,單位產品電(dian)(dian)(dian)(dian)耗下(xia)降。


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