上海感應發電機回收
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上海(hai)感應(ying)發(fa)電機(ji)回收公(gong)司長期高價(jia)提(ti)供感應(ying)發(fa)電機(ji)回收服務。感應發電(dian)機具有結構簡單(dan)、牢(lao)固、體積小、重量輕、輔助設(she)備少、運(yun)行(xing)(xing)維護方便等優(you)點，尤其是(shi)感應發電(dian)機可獨(du)立運(yun)行(xing)(xing)的特點使其非(fei)常實用于(yu)電(dian)網覆(fu)蓋不到的邊遠(yuan)山區(qu)或缺電(dian)的城鎮鄉村或作為應急后備電(dian)源。
一、上海感應發電機回收產品的工作原理
又稱“異步(bu)發(fa)電機”。利用(yong)定子與(yu)(yu)轉(zhuan)子間氣隙旋轉(zhuan)磁場與(yu)(yu)轉(zhuan)子繞組中感應電流(liu)相互(hu)作用(yong)的一種(zhong)交流(liu)發(fa)電機。
其轉(zhuan)(zhuan)(zhuan)子(zi)的(de)轉(zhuan)(zhuan)(zhuan)向和旋(xuan)轉(zhuan)(zhuan)(zhuan)磁場(chang)(chang)的(de)轉(zhuan)(zhuan)(zhuan)向相同，但轉(zhuan)(zhuan)(zhuan)速(su)略高于旋(xuan)轉(zhuan)(zhuan)(zhuan)磁場(chang)(chang)的(de)同步轉(zhuan)(zhuan)(zhuan)速(su)。常(chang)用作小(xiao)功率水(shui)輪發電(dian)機。
異(yi)步(bu)發電(dian)機(ji)(ji)由(you)于維護(hu)方(fang)便(bian)，穩定性(xing)好(hao)，常用(yong)作并(bing)網(wang)運行的(de)小(xiao)功(gong)率水輪發電(dian)機(ji)(ji)。當用(yong)原動(dong)機(ji)(ji)將異(yi)步(bu)電(dian)機(ji)(ji)的(de)轉(zhuan)子順(shun)著磁場旋(xuan)轉(zhuan)方(fang)向拖動(dong)，并(bing)使其轉(zhuan)速(su)超過同步(bu)轉(zhuan)速(su)時(shi)，電(dian)機(ji)(ji)就進入(ru)發電(dian)機(ji)(ji)運行，并(bing)把原動(dong)機(ji)(ji)輸入(ru)的(de)機(ji)(ji)械能轉(zhuan)變成電(dian)能送至電(dian)網(wang)。這時(shi)電(dian)機(ji)(ji)的(de)勵磁電(dian)流取自(zi)電(dian)網(wang)。
異步(bu)(bu)發電(dian)(dian)(dian)(dian)機也可(ke)(ke)以并(bing)聯電(dian)(dian)(dian)(dian)容，靠本身剩磁自行勵磁，獨(du)立發電(dian)(dian)(dian)(dian)（見圖），這時(shi)發電(dian)(dian)(dian)(dian)機的電(dian)(dian)(dian)(dian)壓與(yu)頻率由(you)電(dian)(dian)(dian)(dian)容值、原動機轉速和(he)負載大小(xiao)等(deng)因素決定(ding)。當負載改變，一(yi)般(ban)要相(xiang)應地(di)調節并(bing)聯的電(dian)(dian)(dian)(dian)容值，以維持電(dian)(dian)(dian)(dian)壓穩(wen)定(ding)。由(you)于異步(bu)(bu)電(dian)(dian)(dian)(dian)機并(bing)聯電(dian)(dian)(dian)(dian)容時(shi)，不(bu)需外(wai)加勵磁電(dian)(dian)(dian)(dian)源就(jiu)可(ke)(ke)獨(du)立發電(dian)(dian)(dian)(dian)，故在負荷比較穩(wen)定(ding)的場合(he)，有可(ke)(ke)取(qu)之處。例如可(ke)(ke)用(yong)作(zuo)農村(cun)簡易電(dian)(dian)(dian)(dian)站(zhan)的照明電(dian)(dian)(dian)(dian)源或作(zuo)為(wei)備用(yong)電(dian)(dian)(dian)(dian)源等(deng)。
隨著電(dian)(dian)(dian)(dian)力(li)系統輸(shu)電(dian)(dian)(dian)(dian)電(dian)(dian)(dian)(dian)壓(ya)的提(ti)高,線路(lu)(lu)的增長, 當(dang)線路(lu)(lu)的傳輸(shu)功(gong)率(lv)(lv)低于自然功(gong)率(lv)(lv)時,線路(lu)(lu)和(he)電(dian)(dian)(dian)(dian)站將 出現持續的工頻(pin)過電(dian)(dian)(dian)(dian)壓(ya).為(wei)改善(shan)系統的運行(xing)特性(xing), 不少技術先進(jin)的國(guo)家,在6"世(shi)紀A"年代(dai)初(chu)開(kai)始(shi)研究(jiu)(jiu)異(yi)(yi)步(bu)(bu)發(fa)電(dian)(dian)(dian)(dian)機(ji)在大電(dian)(dian)(dian)(dian)力(li)系統中的應用問題,并認為(wei) 大系統采用異(yi)(yi)步(bu)(bu)發(fa)電(dian)(dian)(dian)(dian)機(ji)后,可提(ti)高系統的穩定(ding)性(xing), 可靠性(xing)和(he)運行(xing)的經濟性(xing). 本文在前期研究(jiu)(jiu)的基(ji)礎上,通過應用實例,進(jin) 一(yi)步(bu)(bu)深(shen)入地研究(jiu)(jiu)了異(yi)(yi)步(bu)(bu)發(fa)電(dian)(dian)(dian)(dian)機(ji)電(dian)(dian)(dian)(dian)磁設(she)計(ji)及(ji)電(dian)(dian)(dian)(dian)站并接(jie) 電(dian)(dian)(dian)(dian)容量(liang)的確定(ding),為(wei)推(tui)廣應用異(yi)(yi)步(bu)(bu)發(fa)電(dian)(dian)(dian)(dian)機(ji)提(ti)供了技術 保障 。
二、上海感應發電機回收產品的有缺點
主(zhu)要(yao)優點(dian)
籠型轉子異(yi)步(bu)(bu)發(fa)電(dian)(dian)機結(jie)構簡(jian) 單,牢(lao)固,特別適合于(yu)高(gao)(gao)圓周速(su)度(du)電(dian)(dian)機.無集電(dian)(dian)環 和碳刷(shua),可(ke)靠性(xing)高(gao)(gao),不受(shou)使用場所限(xian)制.由于(yu)無轉 子勵磁(ci)磁(ci)場,不需(xu)要同期及電(dian)(dian)壓調(diao)節裝置,電(dian)(dian)站(zhan)設 備簡(jian)化.負荷控制十分簡(jian)單,多數情況下不需(xu)水輪機調(diao)速(su)器,水輪機可(ke)全速(su)運行或在鎖定(ding)導葉開度(du)下 在一(yi)定(ding)轉速(su)范圍(wei)內(nei)變(bian)速(su)運行.異(yi)步(bu)(bu)發(fa)電(dian)(dian)機盡管可(ke)能出現功率搖(yao)擺現象(xiang),但無同步(bu)(bu)發(fa)電(dian)(dian)機類似的振蕩和 失步(bu)(bu)問題(ti).并網操作簡(jian)便.
主要缺點
大容(rong)量異(yi)步(bu)發(fa)(fa)電(dian)機(ji)必須與同步(bu)發(fa)(fa)電(dian)機(ji)并列運行或接(jie)入電(dian)網(wang)運行,由同步(bu)發(fa)(fa)電(dian)機(ji)或電(dian)網(wang)提(ti)供自身(shen)所需(xu)的(de)勵磁無(wu)功(gong),因此異(yi)步(bu)發(fa)(fa)電(dian)機(ji)是(shi)電(dian)網(wang)的(de)無(wu)功(gong)負(fu)載.盡管從(cong)原(yuan)理上說異(yi)步(bu)發(fa)(fa)電(dian)機(ji)可以借助于電(dian)容(rong)器孤立(li)運行在自激狀(zhuang)態(tai),但處于這(zhe)種運行狀(zhuang)態(tai)時(shi),發(fa)(fa)電(dian)機(ji)調壓(ya)能力(li)很弱,當發(fa)(fa)電(dian)機(ji)達到臨界負(fu)荷,將引起電(dian)壓(ya)崩潰.
異步發電機的(de)勵(li)磁(ci)一(yi)般而言可(ke)由同(tong)步發電機,電網或靜止(zhi)電容器提供.具體的(de)勵(li)磁(ci)提供方式由電站類型或電網運行條件決定(ding).雖然異步發電機不能提供自身和負載所需的(de)無(wu)功(gong),可(ke)能是(shi)一(yi)個缺陷,但當(dang)其使用恰(qia)當(dang)時,可(ke)作(zuo)為電網無(wu)功(gong)優化(hua)的(de)一(yi)種手段.并將會(hui)對電站和電網帶來明顯的(de)技術經濟效益.
三、上海感應發電機回收產品的應用經濟性
異步發電(dian)(dian)機在(zai)電(dian)(dian)站中應用(yong)的經濟性：
(1)異步發(fa)電機裝備的電站由于無需(xu)直(zhi)流勵磁(ci)系統(tong),同期裝置,電站投(tou)資費用低.
(2)由于無集電環(huan),電刷,轉子(zi)勵磁(ci)繞組,因 此維護及運行費用低.
(3)異步(bu)發電機(ji)轉子為隱極及無同(tong)步(bu)發電機(ji)類似的(de)轉子繞組,因此一般效(xiao)率(lv)高于同(tong)容(rong)量同(tong)轉速的(de)同(tong)步(bu)發電機(ji).相同(tong)的(de)水源(yuan)下(xia),采用異步(bu)發電機(ji)可多發電.
(4)異步(bu)發電(dian)機(ji)(ji)的上述經濟性優勢(shi)將會由于異步(bu)發電(dian)機(ji)(ji)所(suo)需勵磁(或(huo)附(fu)(fu)加同步(bu)容量或(huo)附(fu)(fu)加電(dian)容器)受到(dao)部(bu)分抵消.
(5)異步發電機(ji)所(suo)需(xu)勵磁的大小(xiao)與電機(ji)的額定轉速(su)成反比(bi)(即與電機(ji)的極對數(shu)成正比(bi)),轉速(su)越高(gao),標(biao)幺(yao)值勵磁越低.
(6)異步(bu)發電(dian)機電(dian)站廠(chang)房面(mian)積(ji)較同(tong)步(bu)發電(dian)機電(dian)站廠(chang)房面(mian)積(ji)小。
四、上海感應發電機回收產品的市場應用前景
近年來(lai)，在現代電(dian)(dian)(dian)(dian)(dian)(dian)力系(xi)統(tong)中(zhong)，同(tong)(tong)(tong)步發(fa)(fa)電(dian)(dian)(dian)(dian)(dian)(dian)機(ji)(ji)一(yi)統(tong)天下，由(you)于(yu)開發(fa)(fa)風(feng)力、水(shui)能(neng)及(ji)沼(zhao)氣等可再生(sheng)能(neng)源(yuan)的(de)(de)需要，在一(yi)些草(cao)原、牧場(chang)、海島及(ji)邊(bian)遠山區等大(da)電(dian)(dian)(dian)(dian)(dian)(dian)網沒有(you)(you)覆蓋的(de)(de)地區建立(li)的(de)(de)小(xiao)型(xing)(xing)發(fa)(fa)電(dian)(dian)(dian)(dian)(dian)(dian)站中(zhong)，感應(ying)(ying)發(fa)(fa)電(dian)(dian)(dian)(dian)(dian)(dian)機(ji)(ji)有(you)(you)其獨特(te)的(de)(de)用(yong)途(tu)，實(shi)心(xin)轉子的(de)(de)感應(ying)(ying)發(fa)(fa)電(dian)(dian)(dian)(dian)(dian)(dian)機(ji)(ji)具有(you)(you)明顯(xian)的(de)(de)優越(yue)性。此(ci)外(wai)，在某些缺電(dian)(dian)(dian)(dian)(dian)(dian)的(de)(de)城鎮鄉村，斷電(dian)(dian)(dian)(dian)(dian)(dian)后(hou)所啟用(yong)的(de)(de)應(ying)(ying)急小(xiao)型(xing)(xing)柴（汽）油發(fa)(fa)電(dian)(dian)(dian)(dian)(dian)(dian)機(ji)(ji)組中(zhong)，也有(you)(you)不(bu)少采用(yong)感應(ying)(ying)發(fa)(fa)電(dian)(dian)(dian)(dian)(dian)(dian)機(ji)(ji)。在很(hen)多(duo)場(chang)合、很(hen)多(duo)情況下，感應(ying)(ying)發(fa)(fa)電(dian)(dian)(dian)(dian)(dian)(dian)機(ji)(ji)在許多(duo)方(fang)面優于(yu)傳統(tong)的(de)(de)小(xiao)型(xing)(xing)同(tong)(tong)(tong)步發(fa)(fa)電(dian)(dian)(dian)(dian)(dian)(dian)機(ji)(ji)。近些年來(lai)隨著(zhu)工農業(ye)生(sheng)產以及(ji)國防事(shi)業(ye)的(de)(de)發(fa)(fa)展，人們對各種獨立(li)電(dian)(dian)(dian)(dian)(dian)(dian)源(yuan)的(de)(de)需求量日益增加。在傳統(tong)的(de)(de)發(fa)(fa)電(dian)(dian)(dian)(dian)(dian)(dian)機(ji)(ji)組中(zhong)，一(yi)般采用(yong)同(tong)(tong)(tong)步發(fa)(fa)電(dian)(dian)(dian)(dian)(dian)(dian)機(ji)(ji)。然而，由(you)于(yu)感應(ying)(ying)發(fa)(fa)電(dian)(dian)(dian)(dian)(dian)(dian)機(ji)(ji)具有(you)(you)結構簡單、價格低廉、運行可靠、維(wei)護方(fang)便且(qie)動(dong)態性能(neng)良好(hao)等優點，越(yue)來(lai)越(yue)受到人們的(de)(de)重視，并已(yi)成功地應(ying)(ying)用(yong)于(yu)風(feng)力發(fa)(fa)電(dian)(dian)(dian)(dian)(dian)(dian)、小(xiao)水(shui)電(dian)(dian)(dian)(dian)(dian)(dian)等系(xi)統(tong)中(zhong)，隨著(zhu)技術的(de)(de)進(jin)步感應(ying)(ying)發(fa)(fa)電(dian)(dian)(dian)(dian)(dian)(dian)機(ji)(ji)還將(jiang)用(yong)于(yu)大(da)型(xing)(xing)水(shui)力發(fa)(fa)電(dian)(dian)(dian)(dian)(dian)(dian)機(ji)(ji)，應(ying)(ying)用(yong)前景看好(hao)。
