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202211-28
箱式變壓器高低壓側的接線方式
箱式變壓器Δ/Y和(he)(he)Y/Δ結(jie)線(xian)組是輸(shu)(shu)入輸(shu)(shu)出(chu)不(bu)同(tong)(tong)相(xiang)(xiang)位，按時鐘表(biao)示分別是1點(dian)(dian)和(he)(he)3，5，7，9，11點(dian)(dian)，同(tong)(tong)樣是輸(shu)(shu)入與(yu)輸(shu)(shu)出(chu)之間的(de)(de)相(xiang)(xiang)位關系，也需(xu)要用向量(liang)圖來描述。 為什么選擇(ze)的(de)(de)問題，要看它們(men)各種結(jie)線(xian)的(de)(de)優(you)缺(que)點(dian)(dian)？ 箱式變壓器Δ結(jie)線(xian)可以看出(chu)，每相(xiang)(xiang)繞(rao)(rao)組與(yu)另二相(xiang)(xiang)繞(rao)(rao)組頭尾相(xiang)(xiang)接(jie)，其優(you)點(dian)(dian)是三次(ci)諧(xie)波會(hui)在Δ形(xing)繞(rao)(rao)組中(zhong)自相(xiang)(xiang)抵消，缺(que)點(dian)(dian)是沒有中(zhong)性(xing)點(dian)(dian)，無(wu)法(fa)利用（何種）接(jie)地(di)方法(fa)控制對地(di)電位。 油浸式箱式變壓器 箱式變壓器Y結(jie)線(xian)的(de)(de)優(you)缺(que)點(dian)(dian)正(zheng)好與(yu)Δ結(jie)線(xian)相(xiang)(xiang)反，感應過來的(de)(de)三次(ci)諧(xie)波無(wu)法(fa)抵消，將(jiang)會(hui)影響下一(yi)級或用電設備，但它有中(zhong)性(xing) -
202211-26
柴油發電機組容量的估算需要考慮哪些因素？
柴油(you)發電機(ji)組(zu)(zu)容量(liang)的(de)(de)估算(suan)是(shi)十分重要也是(shi)比較復(fu)雜的(de)(de)問題，容量(liang)過小，無(wu)法(fa)帶全部負載(zai)(zai)(zai)或者在啟(qi)動(dong)大(da)功率(lv)負載(zai)(zai)(zai)時(shi)導致突然停機(ji)；容量(liang)過大(da)，投資及維護成本高(gao)，造(zao)成經(jing)濟(ji)浪費。而且根據柴油(you)機(ji)的(de)(de)特性，如果(guo)(guo)在小負載(zai)(zai)(zai)下(xia)長期工(gong)作(zuo)，將造(zao)成活塞環、噴油(you)嘴積炭嚴重，氣(qi)缸磨(mo)損(sun)加(jia)劇等(deng)損(sun)壞機(ji)組(zu)(zu)的(de)(de)不(bu)良后果(guo)(guo)。所以在容量(liang)估算(suan)時(shi)需要考慮多(duo)方面的(de)(de)因素，包(bao)(bao)括(kuo)：使用(yong)環境(jing)、負載(zai)(zai)(zai)的(de)(de)類型和預留(liu)裕量(liang)等(deng)內容。 （1）使用(yong)環境(jing) 不(bu)同(tong)的(de)(de)工(gong)作(zuo)環境(jing)會影響機(ji)組(zu)(zu)的(de)(de)輸出(chu)功率(lv)。工(gong)作(zuo)環境(jing)主要包(bao)(bao)括(kuo)環境(jing)溫度、海拔和相對濕度。當環境(jing)溫度、海拔過高(gao)時(shi)，空氣(qi)密(mi)度降低，機(ji)組(zu)(zu)運行時(shi)燃燒所 -
202211-25
箱式變壓器選用原則
1、熱(re)繼電(dian)(dian)器(qi)的(de)(de)選(xuan)擇 首先熱(re)繼電(dian)(dian)器(qi)的(de)(de)脫扣(kou)值熱(re)不動(dong)(dong)(dong)作電(dian)(dian)流(liu)(liu)為1.05 的(de)(de)In,動(dong)(dong)(dong)作電(dian)(dian)流(liu)(liu)為1.2In,美式變(bian)壓(ya)(ya)器(qi)是根(gen)據電(dian)(dian)機(ji)的(de)(de)過載(zai)特(te)性設計的(de)(de)，所(suo)以(yi)選(xuan)熱(re)繼時(shi) ，干式變(bian)壓(ya)(ya)器(qi)熱(re)繼的(de)(de)電(dian)(dian)流(liu)(liu)調節(jie)范圍 可以(yi)滿足電(dian)(dian)動(dong)(dong)(dong)機(ji)的(de)(de)額(e)定電(dian)(dian)流(liu)(liu)就可以(yi)了。 第二要根(gen)據電(dian)(dian)動(dong)(dong)(dong)機(ji)是輕載(zai)啟(qi)動(dong)(dong)(dong)還(huan)是重載(zai)啟(qi)動(dong)(dong)(dong)來選(xuan)熱(re)繼的(de)(de)脫扣(kou)特(te)級，箱式變(bian)壓(ya)(ya)器(qi)一般分(fen)10A 10 20 30幾個等級，分(fen)別對應7.2In下熱(re)繼的(de)(de)脫扣(kou)時(shi)間(jian)（環(huan)境溫(wen)度20度的(de)(de)條件下）。比如水泵類負(fu)載(zai)，為輕載(zai)啟(qi)動(dong)(dong)(dong)用10A級。風機(ji)類負(fu)載(zai)為重載(zai)啟(qi)動(dong)(dong)(dong)，用20等級的(de)(de)。 2、塑料外殼式斷(duan)路器(qi)—— -
202211-24
柴油發電機組機房的吸聲與膈聲設置
根據(ju)不同應用場合(he)的(de)需(xu)要，我們可(ke)以(yi)采(cai)取(qu)(qu)隔(ge)聲(sheng)、吸聲(sheng)、消聲(sheng)等(deng)方法(fa)來(lai)控(kong)制柴油(you)(you)發(fa)(fa)電(dian)機(ji)(ji)組的(de)進排(pai)氣、排(pai)煙等(deng)噪(zao)聲(sheng)。那么，大(da)家先來(lai)簡單看看一般的(de)柴油(you)(you)發(fa)(fa)電(dian)機(ji)(ji)組機(ji)(ji)房是如何進行吸聲(sheng)、隔(ge)聲(sheng)設置的(de)。 發(fa)(fa)電(dian)機(ji)(ji)房隔(ge)聲(sheng) 會把機(ji)(ji)房原來(lai)的(de)窗(chuang)戶、門均改制為隔(ge)聲(sheng)窗(chuang)和隔(ge)聲(sheng)門。隔(ge)聲(sheng)窗(chuang)采(cai)用三層(ceng)不等(deng)厚的(de)玻(bo)璃(li)構成，每兩層(ceng)玻(bo)璃(li)之間預留100mm厚的(de)空氣層(ceng)，窗(chuang)戶邊(bian)緣(yuan)采(cai)用橡(xiang)膠(jiao)墊或玻(bo)璃(li)膠(jiao)密(mi)封(feng)(feng)；隔(ge)聲(sheng)門采(cai)用40mm厚的(de)鐵板、超細玻(bo)璃(li)棉、角鋼、扁鐵及沖網板制作，其厚度為150mm，邊(bian)緣(yuan)也采(cai)用橡(xiang)膠(jiao)墊、油(you)(you)毛氈等(deng)密(mi)封(feng)(feng)。 機(ji)(ji)房的(de)吸聲(sheng) 機(ji)(ji)房內(nei)的(de)墻面均采(cai)取(qu)(qu)吸聲(sheng)措(cuo)施 -
202211-23
箱式變壓器試驗研究
電(dian)(dian)力變壓(ya)器(qi)(qi)(qi)是電(dian)(dian)力系(xi)(xi)(xi)統(tong)(tong)中(zhong)比較重要的(de)(de)(de)設(she)備，箱式變壓(ya)器(qi)(qi)(qi)主要通過繞組線(xian)圈來(lai)達到調節電(dian)(dian)壓(ya)的(de)(de)(de)目的(de)(de)(de)。在(zai)當前電(dian)(dian)力系(xi)(xi)(xi)統(tong)(tong)越(yue)(yue)來(lai)越(yue)(yue)復雜(za)(za)，美式變壓(ya)器(qi)(qi)(qi)相(xiang)(xiang)應(ying)的(de)(de)(de)高(gao)(gao)壓(ya)電(dian)(dian)力系(xi)(xi)(xi)統(tong)(tong)構建越(yue)(yue)來(lai)越(yue)(yue)繁雜(za)(za)的(de)(de)(de)情況下，高(gao)(gao)壓(ya)變壓(ya)器(qi)(qi)(qi)運行(xing)(xing)可靠性必(bi)須引起足夠(gou)的(de)(de)(de)重視。而確保(bao)電(dian)(dian)力高(gao)(gao)壓(ya)變壓(ya)器(qi)(qi)(qi)運行(xing)(xing)的(de)(de)(de)可靠性主要就(jiu)是保(bao)障其相(xiang)(xiang)應(ying)的(de)(de)(de)參數(shu)和損耗值等能(neng)滿足基(ji)本需求，干式變壓(ya)器(qi)(qi)(qi)相(xiang)(xiang)應(ying)的(de)(de)(de)標準也能(neng)具備理想的(de)(de)(de)規范性效(xiao)果(guo)。基(ji)于這些要求，相(xiang)(xiang)應(ying)的(de)(de)(de)試驗(yan)(yan)工作(zuo)顯得極為(wei)(wei)必(bi)要，高(gao)(gao)壓(ya)變壓(ya)器(qi)(qi)(qi)試驗(yan)(yan)直接(jie)關(guan)系(xi)(xi)(xi)到整個系(xi)(xi)(xi)統(tong)(tong)的(de)(de)(de)運行(xing)(xing)效(xiao)果(guo)，涉(she)及的(de)(de)(de)內(nei)容和試驗(yan)(yan)檢測手段也較繁雜(za)(za)。由此可見，做好高(gao)(gao)壓(ya)變壓(ya)器(qi)(qi)(qi)試驗(yan)(yan)工作(zuo)極為(wei)(wei)必(bi)要，相(xiang)(xiang)關(guan)專 -
202211-22
發電機組的電能方式
按(an)轉換的電(dian)(dian)(dian)(dian)(dian)(dian)能方(fang)式可分(fen)為(wei)交流發(fa)(fa)(fa)電(dian)(dian)(dian)(dian)(dian)(dian)機(ji)(ji)(ji)(ji)和直流發(fa)(fa)(fa)電(dian)(dian)(dian)(dian)(dian)(dian)機(ji)(ji)(ji)(ji)兩(liang)大類(lei)(lei)。 交流發(fa)(fa)(fa)電(dian)(dian)(dian)(dian)(dian)(dian)機(ji)(ji)(ji)(ji)又分(fen)為(wei)同(tong)步(bu)(bu)發(fa)(fa)(fa)電(dian)(dian)(dian)(dian)(dian)(dian)機(ji)(ji)(ji)(ji)和異(yi)步(bu)(bu)發(fa)(fa)(fa)電(dian)(dian)(dian)(dian)(dian)(dian)機(ji)(ji)(ji)(ji)兩(liang)種(zhong)。同(tong)步(bu)(bu)發(fa)(fa)(fa)電(dian)(dian)(dian)(dian)(dian)(dian)機(ji)(ji)(ji)(ji)又分(fen)為(wei)隱極式同(tong)步(bu)(bu)發(fa)(fa)(fa)電(dian)(dian)(dian)(dian)(dian)(dian)機(ji)(ji)(ji)(ji)和凸極式同(tong)步(bu)(bu)發(fa)(fa)(fa)電(dian)(dian)(dian)(dian)(dian)(dian)機(ji)(ji)(ji)(ji)兩(liang)種(zhong)。現代發(fa)(fa)(fa)電(dian)(dian)(dian)(dian)(dian)(dian)站中最常用(yong)的是同(tong)步(bu)(bu)發(fa)(fa)(fa)電(dian)(dian)(dian)(dian)(dian)(dian)機(ji)(ji)(ji)(ji)，異(yi)步(bu)(bu)發(fa)(fa)(fa)電(dian)(dian)(dian)(dian)(dian)(dian)機(ji)(ji)(ji)(ji)很(hen)少用(yong)。 動(dong)力(li) 動(dong)力(li) 交流發(fa)(fa)(fa)電(dian)(dian)(dian)(dian)(dian)(dian)機(ji)(ji)(ji)(ji)組又可分(fen)為(wei)單相發(fa)(fa)(fa)電(dian)(dian)(dian)(dian)(dian)(dian)機(ji)(ji)(ji)(ji)和三相發(fa)(fa)(fa)電(dian)(dian)(dian)(dian)(dian)(dian)機(ji)(ji)(ji)(ji)兩(liang)種(zhong)。三相發(fa)(fa)(fa)電(dian)(dian)(dian)(dian)(dian)(dian)機(ji)(ji)(ji)(ji)輸出電(dian)(dian)(dian)(dian)(dian)(dian)壓(ya)為(wei)380V,單相發(fa)(fa)(fa)電(dian)(dian)(dian)(dian)(dian)(dian)機(ji)(ji)(ji)(ji)輸出電(dian)(dian)(dian)(dian)(dian)(dian)壓(ya)為(wei)220V. 勵(li)(li)(li)(li)磁(ci)方(fang)式分(fen)類(lei)(lei)： 按(an)勵(li)(li)(li)(li)磁(ci)方(fang)式可分(fen)為(wei)刷勵(li)(li)(li)(li)磁(ci)發(fa)(fa)(fa)電(dian)(dian)(dian)(dian)(dian)(dian)機(ji)(ji)(ji)(ji)和無(wu)刷勵(li)(li)(li)(li)磁(ci)發(fa)(fa)(fa)電(dian)(dian)(dian)(dian)(dian)(dian)機(ji)(ji)(ji)(ji)兩(liang)類(lei)(lei) 有刷勵(li)(li)(li)(li)磁(ci)發(fa)(fa)(fa)電(dian)(dian)(dian)(dian)(dian)(dian)機(ji)(ji)(ji)(ji)的勵(li)(li)(li)(li)磁(ci)方(fang)式為(wei)他勵(li)(li)(li)(li)式，無(wu)刷勵(li)(li)(li)(li)磁(ci)發(fa)(fa)(fa)電(dian)(dian)(dian)(dian)(dian)(dian)機(ji)(ji)(ji)(ji)的勵(li)(li)(li)(li)磁(ci)方(fang)式為(wei)自勵(li)(li)(li)(li)式。他勵(li)(li)(li)(li)式式發(fa)(fa)(fa)電(dian)(dian)(dian)(dian)(dian)(dian)機(ji)(ji)(ji)(ji)的整(zheng)流裝 -
202211-21
箱式變壓器應該離我們多遠才安全？
現在是處于一個電(dian)(dian)氣(qi)時代，高樓(lou)大廈之間(jian)擁有這(zhe)各(ge)種各(ge)有的(de)(de)(de)電(dian)(dian)氣(qi)設備，保(bao)障著我們生活的(de)(de)(de)供電(dian)(dian)運行。不(bu)知道(dao)大家是否知道(dao)箱式(shi)(shi)變(bian)電(dian)(dian)站，就(jiu)是那(nei)個街道(dao)旁你(ni)進場會(hui)看到(dao)的(de)(de)(de)那(nei)個“大鐵皮(pi)箱”，這(zhe)就(jiu)是箱式(shi)(shi)變(bian)電(dian)(dian)站，支撐著我們生活當中的(de)(de)(de)電(dian)(dian)力(li)(li)心痛，美(mei)式(shi)(shi)變(bian)壓這(zhe)是一個大型的(de)(de)(de)的(de)(de)(de)電(dian)(dian)力(li)(li)設備，每當你(ni)經過(guo)它的(de)(de)(de)時候(hou)，都能聽到(dao)“滋(zi)(zi)滋(zi)(zi)滋(zi)(zi)”的(de)(de)(de)聲音，那(nei)么這(zhe)樣的(de)(de)(de)電(dian)(dian)力(li)(li)設備，有著大量的(de)(de)(de)輻(fu)射嗎？箱式(shi)(shi)變(bian)壓器需要距(ju)離(li)我們多遠才算安(an)全距(ju)離(li)？ 箱式(shi)(shi)變(bian)壓器應(ying)該離(li)我們多遠才安(an)全？ 根(gen)據《安(an)規》數據，各(ge)電(dian)(dian)壓等級安(an)全距(ju)離(li)是：500kv，5米；220kv， -
202211-19
柴油發電機組錯誤的啟動方式！
一：加(jia)(jia)大油(you)(you)(you)(you)門(men)(men)啟(qi)(qi)動(dong)(dong) 柴(chai)油(you)(you)(you)(you)發電機(ji)(ji)組啟(qi)(qi)動(dong)(dong)時(shi)不要加(jia)(jia)油(you)(you)(you)(you)門(men)(men)。一般將油(you)(you)(you)(you)門(men)(men)放置(zhi)到怠速位(wei)置(zhi)上即可(ke)。但很多人為了能使柴(chai)油(you)(you)(you)(you)發電機(ji)(ji)組快點啟(qi)(qi)動(dong)(dong)，啟(qi)(qi)動(dong)(dong)前或(huo)啟(qi)(qi)動(dong)(dong)過(guo)程中猛加(jia)(jia)油(you)(you)(you)(you)門(men)(men)。這(zhe)(zhe)種(zhong)做法的(de)危害是： 浪費燃油(you)(you)(you)(you)。多余的(de)柴(chai)油(you)(you)(you)(you)會沖刷缸壁，使活塞(sai)、活塞(sai)環與(yu)氣(qi)缸套之(zhi)間潤滑惡化而加(jia)(jia)劇磨損(sun);余油(you)(you)(you)(you)流入油(you)(you)(you)(you)底殼會稀釋機(ji)(ji)油(you)(you)(you)(you)而降低(di)潤滑效果(guo);氣(qi)缸中過(guo)多的(de)柴(chai)油(you)(you)(you)(you)燃燒(shao)不完(wan)全會形成積碳。 柴(chai)油(you)(you)(you)(you)機(ji)(ji)大油(you)(you)(you)(you)門(men)(men)啟(qi)(qi)動(dong)(dong)后，轉速可(ke)能升高很快，這(zhe)(zhe)會對運動(dong)(dong)部件造成較大的(de)損(sun)壞(huai)(加(jia)(jia)劇磨損(sun)或(huo)造成拉缸等故障)。 二：強力冷態拖車(che)啟(qi)(qi)動(dong)(dong) 柴(chai)油(you)(you)(you)(you)發電機(ji)(ji)在(zai)冷車(che)狀態 -
202211-18
箱式變電站過電壓現象的原因及應對措施
1、過(guo)(guo)(guo)(guo)電(dian)(dian)(dian)(dian)壓的(de)(de)概念： 當箱式變電(dian)(dian)(dian)(dian)站中的(de)(de)變壓器運行時，繼電(dian)(dian)(dian)(dian)保護校驗儀如果電(dian)(dian)(dian)(dian)壓超(chao)過(guo)(guo)(guo)(guo)它(ta)的(de)(de)最大(da)允許工作(zuo)電(dian)(dian)(dian)(dian)壓，就稱(cheng)為(wei)變壓器的(de)(de)過(guo)(guo)(guo)(guo)電(dian)(dian)(dian)(dian)壓。 2、過(guo)(guo)(guo)(guo)電(dian)(dian)(dian)(dian)壓的(de)(de)分類： 過(guo)(guo)(guo)(guo)電(dian)(dian)(dian)(dian)壓往往會(hui)對變壓器的(de)(de)絕(jue)(jue)緣造(zao)成很大(da)的(de)(de)危(wei)害,甚至(zhi)使絕(jue)(jue)緣擊穿(chuan)。 過(guo)(guo)(guo)(guo)電(dian)(dian)(dian)(dian)壓可分為(wei)大(da)氣(qi)過(guo)(guo)(guo)(guo)電(dian)(dian)(dian)(dian)壓和操作(zuo)過(guo)(guo)(guo)(guo)電(dian)(dian)(dian)(dian)壓兩種： (1)大(da)氣(qi)過(guo)(guo)(guo)(guo)電(dian)(dian)(dian)(dian)壓：輸電(dian)(dian)(dian)(dian)線(xian)路(lu)直接遭雷(lei)擊或(huo)(huo)雷(lei)云放電(dian)(dian)(dian)(dian)時,電(dian)(dian)(dian)(dian)磁場的(de)(de)劇烈(lie)變化所(suo)引起的(de)(de)過(guo)(guo)(guo)(guo)電(dian)(dian)(dian)(dian)壓稱(cheng)為(wei)大(da)氣(qi)過(guo)(guo)(guo)(guo)電(dian)(dian)(dian)(dian)壓; (2)操作(zuo)過(guo)(guo)(guo)(guo)電(dian)(dian)(dian)(dian)壓：當箱式變電(dian)(dian)(dian)(dian)站中的(de)(de)變壓器或(huo)(huo)線(xian)路(lu)上的(de)(de)開關進行合閘或(huo)(huo)拉閘操作(zuo)時,因系統中電(dian)(dian)(dian)(dian)磁能量振蕩(dang)和積聚而產(chan)生的(de)(de)過(guo)(guo)(guo)(guo)電(dian)(dian)(dian)(dian)壓稱(cheng)為(wei)操作(zuo)過(guo)(guo)(guo)(guo)電(dian)(dian)(dian)(dian)壓。 變壓器的(de)(de)這 -
202211-17
季節更換，柴油發電機組也要注意更換適合黏度的機油
近日，冷空氣(qi)南(nan)下(xia)越來越頻繁，氣(qi)溫(wen)驟降、晝夜溫(wen)差大，我國部(bu)分地區氣(qi)溫(wen)已(yi)明顯(xian)下(xia)降，換(huan)季之時，不光是人們要(yao)(yao)更(geng)換(huan)季節衣(yi)物(wu)，柴(chai)油(you)發電(dian)(dian)機(ji)(ji)(ji)(ji)(ji)組所使用的(de)(de)機(ji)(ji)(ji)(ji)(ji)油(you)也要(yao)(yao)注(zhu)意(yi)根據(ju)當地氣(qi)候條件更(geng)換(huan)適合的(de)(de)黏度(du)等(deng)(deng)(deng)級(ji)。 對柴(chai)油(you)發電(dian)(dian)機(ji)(ji)(ji)(ji)(ji)來說，機(ji)(ji)(ji)(ji)(ji)油(you)的(de)(de)選擇是非常重(zhong)要(yao)(yao)的(de)(de)，柴(chai)油(you)發電(dian)(dian)機(ji)(ji)(ji)(ji)(ji)組是一(yi)(yi)種高壓噴射電(dian)(dian)控發電(dian)(dian)機(ji)(ji)(ji)(ji)(ji)，零部(bu)件精度(du)很(hen)高，因(yin)此發電(dian)(dian)機(ji)(ji)(ji)(ji)(ji)廠家要(yao)(yao)求(qiu)用戶對機(ji)(ji)(ji)(ji)(ji)油(you)的(de)(de)選用一(yi)(yi)定(ding)要(yao)(yao)嚴謹，這直接關系到柴(chai)油(you)發電(dian)(dian)機(ji)(ji)(ji)(ji)(ji)的(de)(de)正(zheng)常使用，在選擇機(ji)(ji)(ji)(ji)(ji)油(you)時，要(yao)(yao)根據(ju)當地季節和(he)氣(qi)溫(wen)選擇合適的(de)(de)牌號(hao)機(ji)(ji)(ji)(ji)(ji)油(you)，且一(yi)(yi)定(ding)要(yao)(yao)注(zhu)意(yi)機(ji)(ji)(ji)(ji)(ji)油(you)質量等(deng)(deng)(deng)級(ji)和(he)粘度(du)等(deng)(deng)(deng)級(ji)這兩個重(zhong)要(yao)(yao)指標(biao)。一(yi)(yi)般在柴(chai)油(you)發動(dong)機(ji)(ji)(ji)(ji)(ji)的(de)(de)說明書中均有規定(ding)