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202211-28
箱式變壓器高低壓側的接線方式
箱式(shi)變(bian)(bian)壓(ya)器Δ/Y和(he)(he)Y/Δ結(jie)線組(zu)是輸(shu)入(ru)輸(shu)出不(bu)同相(xiang)位，按(an)時(shi)鐘表示(shi)分別(bie)是1點(dian)(dian)和(he)(he)3，5，7，9，11點(dian)(dian)，同樣是輸(shu)入(ru)與輸(shu)出之(zhi)間的(de)相(xiang)位關系，也(ye)需(xu)要(yao)(yao)用向量圖來描述。 為什(shen)么選擇(ze)的(de)問題，要(yao)(yao)看它(ta)們各種結(jie)線的(de)優缺點(dian)(dian)？ 箱式(shi)變(bian)(bian)壓(ya)器Δ結(jie)線可以看出，每相(xiang)繞組(zu)與另二相(xiang)繞組(zu)頭(tou)尾相(xiang)接，其優點(dian)(dian)是三次諧(xie)波(bo)(bo)會在Δ形繞組(zu)中自相(xiang)抵(di)消(xiao)，缺點(dian)(dian)是沒有(you)中性點(dian)(dian)，無(wu)法利用（何種）接地方(fang)法控制對地電位。 油浸式(shi)箱式(shi)變(bian)(bian)壓(ya)器 箱式(shi)變(bian)(bian)壓(ya)器Y結(jie)線的(de)優缺點(dian)(dian)正好與Δ結(jie)線相(xiang)反，感(gan)應過來的(de)三次諧(xie)波(bo)(bo)無(wu)法抵(di)消(xiao)，將會影響(xiang)下一級或用電設備，但(dan)它(ta)有(you)中性 -
202211-26
柴油發電機組容量的估算需要考慮哪些因素？
柴油發電機(ji)組(zu)(zu)容量的(de)(de)(de)(de)估算是十分(fen)重要(yao)也(ye)是比較(jiao)復雜的(de)(de)(de)(de)問題，容量過小，無法帶全部負載或(huo)者在啟(qi)動大功(gong)率(lv)負載時(shi)導致突(tu)然停機(ji)；容量過大，投(tou)資及維護(hu)成本高，造成經濟浪費。而且根據(ju)柴油機(ji)的(de)(de)(de)(de)特(te)性，如(ru)果(guo)在小負載下長期工作，將造成活塞環(huan)、噴油嘴積炭(tan)嚴重，氣(qi)缸磨損(sun)加劇等損(sun)壞機(ji)組(zu)(zu)的(de)(de)(de)(de)不(bu)良(liang)后果(guo)。所(suo)以(yi)在容量估算時(shi)需要(yao)考慮多(duo)方面的(de)(de)(de)(de)因(yin)素，包括：使用環(huan)境(jing)(jing)(jing)、負載的(de)(de)(de)(de)類型和預留裕量等內(nei)容。 （1）使用環(huan)境(jing)(jing)(jing) 不(bu)同的(de)(de)(de)(de)工作環(huan)境(jing)(jing)(jing)會(hui)影響機(ji)組(zu)(zu)的(de)(de)(de)(de)輸出功(gong)率(lv)。工作環(huan)境(jing)(jing)(jing)主要(yao)包括環(huan)境(jing)(jing)(jing)溫度、海(hai)拔(ba)和相對濕度。當(dang)環(huan)境(jing)(jing)(jing)溫度、海(hai)拔(ba)過高時(shi)，空(kong)氣(qi)密(mi)度降低，機(ji)組(zu)(zu)運(yun)行時(shi)燃(ran)燒所(suo) -
202211-25
箱式變壓器選用原則
1、熱(re)繼電器(qi)的(de)選擇 首(shou)先熱(re)繼電器(qi)的(de)脫扣(kou)值熱(re)不動(dong)(dong)作(zuo)電流為(wei)1.05 的(de)In,動(dong)(dong)作(zuo)電流為(wei)1.2In,美式(shi)(shi)變壓(ya)器(qi)是根據電機的(de)過載(zai)(zai)特性(xing)設(she)計的(de)，所(suo)以(yi)選熱(re)繼時 ，干(gan)式(shi)(shi)變壓(ya)器(qi)熱(re)繼的(de)電流調節范(fan)圍 可以(yi)滿足電動(dong)(dong)機的(de)額定電流就可以(yi)了。 第二(er)要根據電動(dong)(dong)機是輕(qing)載(zai)(zai)啟(qi)(qi)(qi)(qi)動(dong)(dong)還是重(zhong)載(zai)(zai)啟(qi)(qi)(qi)(qi)動(dong)(dong)來選熱(re)繼的(de)脫扣(kou)特級，箱(xiang)式(shi)(shi)變壓(ya)器(qi)一般分10A 10 20 30幾個等(deng)級，分別對應7.2In下(xia)(xia)熱(re)繼的(de)脫扣(kou)時間(jian)（環境溫度20度的(de)條件下(xia)(xia)）。比(bi)如水(shui)泵類負載(zai)(zai)，為(wei)輕(qing)載(zai)(zai)啟(qi)(qi)(qi)(qi)動(dong)(dong)用10A級。風(feng)機類負載(zai)(zai)為(wei)重(zhong)載(zai)(zai)啟(qi)(qi)(qi)(qi)動(dong)(dong)，用20等(deng)級的(de)。 2、塑料(liao)外殼式(shi)(shi)斷路器(qi)—— -
202211-24
柴油發電機組機房的吸聲與膈聲設置
根據不同應用(yong)(yong)場合的(de)需要，我(wo)們可(ke)以采取(qu)隔(ge)聲(sheng)(sheng)(sheng)(sheng)、吸聲(sheng)(sheng)(sheng)(sheng)、消聲(sheng)(sheng)(sheng)(sheng)等方法來(lai)(lai)控制(zhi)柴(chai)(chai)油(you)(you)(you)發電(dian)機(ji)組的(de)進(jin)(jin)排(pai)氣(qi)、排(pai)煙等噪聲(sheng)(sheng)(sheng)(sheng)。那么，大(da)家先來(lai)(lai)簡單看看一般的(de)柴(chai)(chai)油(you)(you)(you)發電(dian)機(ji)組機(ji)房(fang)是如何進(jin)(jin)行吸聲(sheng)(sheng)(sheng)(sheng)、隔(ge)聲(sheng)(sheng)(sheng)(sheng)設置的(de)。 發電(dian)機(ji)房(fang)隔(ge)聲(sheng)(sheng)(sheng)(sheng) 會把機(ji)房(fang)原來(lai)(lai)的(de)窗戶、門(men)均改(gai)制(zhi)為隔(ge)聲(sheng)(sheng)(sheng)(sheng)窗和隔(ge)聲(sheng)(sheng)(sheng)(sheng)門(men)。隔(ge)聲(sheng)(sheng)(sheng)(sheng)窗采用(yong)(yong)三層不等厚的(de)玻(bo)璃構成，每兩層玻(bo)璃之間預留(liu)100mm厚的(de)空氣(qi)層，窗戶邊(bian)緣采用(yong)(yong)橡(xiang)膠(jiao)(jiao)墊(dian)或玻(bo)璃膠(jiao)(jiao)密封；隔(ge)聲(sheng)(sheng)(sheng)(sheng)門(men)采用(yong)(yong)40mm厚的(de)鐵(tie)板(ban)、超細(xi)玻(bo)璃棉(mian)、角鋼、扁鐵(tie)及(ji)沖網板(ban)制(zhi)作，其厚度(du)為150mm，邊(bian)緣也(ye)采用(yong)(yong)橡(xiang)膠(jiao)(jiao)墊(dian)、油(you)(you)(you)毛氈等密封。 機(ji)房(fang)的(de)吸聲(sheng)(sheng)(sheng)(sheng) 機(ji)房(fang)內的(de)墻(qiang)面均采取(qu)吸聲(sheng)(sheng)(sheng)(sheng)措施(shi) -
202211-23
箱式變壓器試驗研究
電(dian)(dian)(dian)力(li)變(bian)(bian)(bian)壓(ya)(ya)器(qi)是電(dian)(dian)(dian)力(li)系(xi)(xi)(xi)統中比(bi)較重要(yao)(yao)的(de)(de)設備，箱(xiang)式變(bian)(bian)(bian)壓(ya)(ya)器(qi)主要(yao)(yao)通過(guo)繞組線圈來(lai)達到(dao)調節電(dian)(dian)(dian)壓(ya)(ya)的(de)(de)目的(de)(de)。在當前電(dian)(dian)(dian)力(li)系(xi)(xi)(xi)統越(yue)(yue)來(lai)越(yue)(yue)復(fu)雜(za)，美(mei)式變(bian)(bian)(bian)壓(ya)(ya)器(qi)相(xiang)(xiang)應(ying)的(de)(de)高壓(ya)(ya)電(dian)(dian)(dian)力(li)系(xi)(xi)(xi)統構建越(yue)(yue)來(lai)越(yue)(yue)繁雜(za)的(de)(de)情況下，高壓(ya)(ya)變(bian)(bian)(bian)壓(ya)(ya)器(qi)運(yun)行可(ke)靠(kao)(kao)性必(bi)須引起足(zu)夠的(de)(de)重視。而確(que)保電(dian)(dian)(dian)力(li)高壓(ya)(ya)變(bian)(bian)(bian)壓(ya)(ya)器(qi)運(yun)行的(de)(de)可(ke)靠(kao)(kao)性主要(yao)(yao)就是保障其(qi)相(xiang)(xiang)應(ying)的(de)(de)參(can)數和損耗值等能滿足(zu)基(ji)本需求(qiu)，干式變(bian)(bian)(bian)壓(ya)(ya)器(qi)相(xiang)(xiang)應(ying)的(de)(de)標(biao)準也(ye)能具備理想的(de)(de)規范性效果。基(ji)于這些要(yao)(yao)求(qiu)，相(xiang)(xiang)應(ying)的(de)(de)試(shi)(shi)驗工(gong)作(zuo)顯得極為(wei)(wei)必(bi)要(yao)(yao)，高壓(ya)(ya)變(bian)(bian)(bian)壓(ya)(ya)器(qi)試(shi)(shi)驗直接關(guan)系(xi)(xi)(xi)到(dao)整(zheng)個(ge)系(xi)(xi)(xi)統的(de)(de)運(yun)行效果，涉及的(de)(de)內容和試(shi)(shi)驗檢測手(shou)段(duan)也(ye)較繁雜(za)。由此(ci)可(ke)見，做好(hao)高壓(ya)(ya)變(bian)(bian)(bian)壓(ya)(ya)器(qi)試(shi)(shi)驗工(gong)作(zuo)極為(wei)(wei)必(bi)要(yao)(yao)，相(xiang)(xiang)關(guan)專 -
202211-22
發電機組的電能方式
按轉換的電(dian)(dian)(dian)(dian)(dian)能方式(shi)可分為(wei)(wei)交(jiao)流發(fa)(fa)(fa)電(dian)(dian)(dian)(dian)(dian)機(ji)和(he)直流發(fa)(fa)(fa)電(dian)(dian)(dian)(dian)(dian)機(ji)兩大類。 交(jiao)流發(fa)(fa)(fa)電(dian)(dian)(dian)(dian)(dian)機(ji)又分為(wei)(wei)同(tong)步(bu)(bu)發(fa)(fa)(fa)電(dian)(dian)(dian)(dian)(dian)機(ji)和(he)異步(bu)(bu)發(fa)(fa)(fa)電(dian)(dian)(dian)(dian)(dian)機(ji)兩種(zhong)。同(tong)步(bu)(bu)發(fa)(fa)(fa)電(dian)(dian)(dian)(dian)(dian)機(ji)又分為(wei)(wei)隱極(ji)(ji)式(shi)同(tong)步(bu)(bu)發(fa)(fa)(fa)電(dian)(dian)(dian)(dian)(dian)機(ji)和(he)凸極(ji)(ji)式(shi)同(tong)步(bu)(bu)發(fa)(fa)(fa)電(dian)(dian)(dian)(dian)(dian)機(ji)兩種(zhong)。現代(dai)發(fa)(fa)(fa)電(dian)(dian)(dian)(dian)(dian)站中最(zui)常(chang)用(yong)(yong)的是(shi)同(tong)步(bu)(bu)發(fa)(fa)(fa)電(dian)(dian)(dian)(dian)(dian)機(ji)，異步(bu)(bu)發(fa)(fa)(fa)電(dian)(dian)(dian)(dian)(dian)機(ji)很少(shao)用(yong)(yong)。 動力 動力 交(jiao)流發(fa)(fa)(fa)電(dian)(dian)(dian)(dian)(dian)機(ji)組又可分為(wei)(wei)單相(xiang)(xiang)發(fa)(fa)(fa)電(dian)(dian)(dian)(dian)(dian)機(ji)和(he)三相(xiang)(xiang)發(fa)(fa)(fa)電(dian)(dian)(dian)(dian)(dian)機(ji)兩種(zhong)。三相(xiang)(xiang)發(fa)(fa)(fa)電(dian)(dian)(dian)(dian)(dian)機(ji)輸出(chu)電(dian)(dian)(dian)(dian)(dian)壓(ya)為(wei)(wei)380V,單相(xiang)(xiang)發(fa)(fa)(fa)電(dian)(dian)(dian)(dian)(dian)機(ji)輸出(chu)電(dian)(dian)(dian)(dian)(dian)壓(ya)為(wei)(wei)220V. 勵磁(ci)(ci)方式(shi)分類： 按勵磁(ci)(ci)方式(shi)可分為(wei)(wei)刷勵磁(ci)(ci)發(fa)(fa)(fa)電(dian)(dian)(dian)(dian)(dian)機(ji)和(he)無刷勵磁(ci)(ci)發(fa)(fa)(fa)電(dian)(dian)(dian)(dian)(dian)機(ji)兩類 有刷勵磁(ci)(ci)發(fa)(fa)(fa)電(dian)(dian)(dian)(dian)(dian)機(ji)的勵磁(ci)(ci)方式(shi)為(wei)(wei)他勵式(shi)，無刷勵磁(ci)(ci)發(fa)(fa)(fa)電(dian)(dian)(dian)(dian)(dian)機(ji)的勵磁(ci)(ci)方式(shi)為(wei)(wei)自勵式(shi)。他勵式(shi)式(shi)發(fa)(fa)(fa)電(dian)(dian)(dian)(dian)(dian)機(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(yi)個電(dian)(dian)氣時代，高樓大(da)廈(sha)之間擁有(you)這各(ge)種各(ge)有(you)的(de)(de)電(dian)(dian)氣設(she)備(bei)，保障著(zhu)我(wo)(wo)們(men)(men)生(sheng)活的(de)(de)供電(dian)(dian)運行。不知道大(da)家是否(fou)知道箱(xiang)(xiang)式(shi)變(bian)(bian)電(dian)(dian)站，就是那(nei)(nei)個街道旁(pang)你進場會看到的(de)(de)那(nei)(nei)個“大(da)鐵皮箱(xiang)(xiang)”，這就是箱(xiang)(xiang)式(shi)變(bian)(bian)電(dian)(dian)站，支(zhi)撐著(zhu)我(wo)(wo)們(men)(men)生(sheng)活當中的(de)(de)電(dian)(dian)力(li)心痛，美(mei)式(shi)變(bian)(bian)壓這是一(yi)個大(da)型的(de)(de)的(de)(de)電(dian)(dian)力(li)設(she)備(bei)，每當你經過它的(de)(de)時候，都能(neng)聽到“滋滋滋”的(de)(de)聲(sheng)音(yin)，那(nei)(nei)么這樣的(de)(de)電(dian)(dian)力(li)設(she)備(bei)，有(you)著(zhu)大(da)量(liang)的(de)(de)輻射嗎？箱(xiang)(xiang)式(shi)變(bian)(bian)壓器需要距(ju)離(li)我(wo)(wo)們(men)(men)多遠才算安全距(ju)離(li)？ 箱(xiang)(xiang)式(shi)變(bian)(bian)壓器應該離(li)我(wo)(wo)們(men)(men)多遠才安全？ 根據《安規》數據，各(ge)電(dian)(dian)壓等級安全距(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)大油(you)門(men)(men)啟(qi)(qi)(qi)動(dong) 柴(chai)油(you)發(fa)電機(ji)(ji)(ji)(ji)組啟(qi)(qi)(qi)動(dong)時(shi)不要加(jia)油(you)門(men)(men)。一般將油(you)門(men)(men)放置(zhi)到(dao)怠速位置(zhi)上即(ji)可(ke)。但很多人為了能使柴(chai)油(you)發(fa)電機(ji)(ji)(ji)(ji)組快點(dian)啟(qi)(qi)(qi)動(dong)，啟(qi)(qi)(qi)動(dong)前或(huo)啟(qi)(qi)(qi)動(dong)過(guo)程中(zhong)(zhong)猛(meng)加(jia)油(you)門(men)(men)。這種做法(fa)的危害是： 浪費燃油(you)。多余(yu)的柴(chai)油(you)會(hui)(hui)沖刷缸(gang)壁，使活塞(sai)、活塞(sai)環(huan)與氣(qi)缸(gang)套之間潤滑惡化而(er)加(jia)劇磨(mo)損(sun);余(yu)油(you)流入油(you)底(di)殼會(hui)(hui)稀釋機(ji)(ji)(ji)(ji)油(you)而(er)降(jiang)低潤滑效果;氣(qi)缸(gang)中(zhong)(zhong)過(guo)多的柴(chai)油(you)燃燒(shao)不完(wan)全會(hui)(hui)形成(cheng)(cheng)積(ji)碳。 柴(chai)油(you)機(ji)(ji)(ji)(ji)大油(you)門(men)(men)啟(qi)(qi)(qi)動(dong)后，轉速可(ke)能升(sheng)高很快，這會(hui)(hui)對運(yun)動(dong)部件造(zao)成(cheng)(cheng)較大的損(sun)壞(加(jia)劇磨(mo)損(sun)或(huo)造(zao)成(cheng)(cheng)拉缸(gang)等故障)。 二：強力冷(leng)態拖車(che)啟(qi)(qi)(qi)動(dong) 柴(chai)油(you)發(fa)電機(ji)(ji)(ji)(ji)在冷(leng)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)(dian)(dian)壓(ya)(ya)(ya)的(de)(de)(de)(de)概(gai)念： 當箱(xiang)式變(bian)(bian)(bian)電(dian)(dian)(dian)(dian)(dian)(dian)站(zhan)中的(de)(de)(de)(de)變(bian)(bian)(bian)壓(ya)(ya)(ya)器(qi)運(yun)行時，繼電(dian)(dian)(dian)(dian)(dian)(dian)保護校驗(yan)儀如果電(dian)(dian)(dian)(dian)(dian)(dian)壓(ya)(ya)(ya)超過(guo)(guo)(guo)(guo)它的(de)(de)(de)(de)最(zui)大(da)(da)允許工作(zuo)電(dian)(dian)(dian)(dian)(dian)(dian)壓(ya)(ya)(ya)，就稱(cheng)為變(bian)(bian)(bian)壓(ya)(ya)(ya)器(qi)的(de)(de)(de)(de)過(guo)(guo)(guo)(guo)電(dian)(dian)(dian)(dian)(dian)(dian)壓(ya)(ya)(ya)。 2、過(guo)(guo)(guo)(guo)電(dian)(dian)(dian)(dian)(dian)(dian)壓(ya)(ya)(ya)的(de)(de)(de)(de)分(fen)(fen)類： 過(guo)(guo)(guo)(guo)電(dian)(dian)(dian)(dian)(dian)(dian)壓(ya)(ya)(ya)往往會(hui)對變(bian)(bian)(bian)壓(ya)(ya)(ya)器(qi)的(de)(de)(de)(de)絕緣造成(cheng)很大(da)(da)的(de)(de)(de)(de)危(wei)害,甚至使絕緣擊穿。 過(guo)(guo)(guo)(guo)電(dian)(dian)(dian)(dian)(dian)(dian)壓(ya)(ya)(ya)可分(fen)(fen)為大(da)(da)氣(qi)過(guo)(guo)(guo)(guo)電(dian)(dian)(dian)(dian)(dian)(dian)壓(ya)(ya)(ya)和操(cao)作(zuo)過(guo)(guo)(guo)(guo)電(dian)(dian)(dian)(dian)(dian)(dian)壓(ya)(ya)(ya)兩種： (1)大(da)(da)氣(qi)過(guo)(guo)(guo)(guo)電(dian)(dian)(dian)(dian)(dian)(dian)壓(ya)(ya)(ya)：輸電(dian)(dian)(dian)(dian)(dian)(dian)線路(lu)直(zhi)接遭雷擊或雷云放電(dian)(dian)(dian)(dian)(dian)(dian)時,電(dian)(dian)(dian)(dian)(dian)(dian)磁(ci)場的(de)(de)(de)(de)劇烈變(bian)(bian)(bian)化(hua)所引起的(de)(de)(de)(de)過(guo)(guo)(guo)(guo)電(dian)(dian)(dian)(dian)(dian)(dian)壓(ya)(ya)(ya)稱(cheng)為大(da)(da)氣(qi)過(guo)(guo)(guo)(guo)電(dian)(dian)(dian)(dian)(dian)(dian)壓(ya)(ya)(ya); (2)操(cao)作(zuo)過(guo)(guo)(guo)(guo)電(dian)(dian)(dian)(dian)(dian)(dian)壓(ya)(ya)(ya)：當箱(xiang)式變(bian)(bian)(bian)電(dian)(dian)(dian)(dian)(dian)(dian)站(zhan)中的(de)(de)(de)(de)變(bian)(bian)(bian)壓(ya)(ya)(ya)器(qi)或線路(lu)上的(de)(de)(de)(de)開關進行合(he)閘或拉閘操(cao)作(zuo)時,因(yin)系(xi)統中電(dian)(dian)(dian)(dian)(dian)(dian)磁(ci)能量振蕩和積聚而(er)產生的(de)(de)(de)(de)過(guo)(guo)(guo)(guo)電(dian)(dian)(dian)(dian)(dian)(dian)壓(ya)(ya)(ya)稱(cheng)為操(cao)作(zuo)過(guo)(guo)(guo)(guo)電(dian)(dian)(dian)(dian)(dian)(dian)壓(ya)(ya)(ya)。 變(bian)(bian)(bian)壓(ya)(ya)(ya)器(qi)的(de)(de)(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)南下(xia)越(yue)來越(yue)頻(pin)繁，氣(qi)溫驟降、晝夜溫差大，我國(guo)部(bu)分(fen)地(di)(di)區氣(qi)溫已(yi)明顯下(xia)降，換季之(zhi)時(shi)，不光是人們(men)要(yao)更換季節衣物，柴(chai)(chai)油(you)(you)發(fa)電(dian)機(ji)組所使用的(de)機(ji)油(you)(you)也要(yao)注(zhu)意根(gen)據(ju)當地(di)(di)氣(qi)候(hou)條件更換適合的(de)黏度等(deng)級。 對柴(chai)(chai)油(you)(you)發(fa)電(dian)機(ji)來說，機(ji)油(you)(you)的(de)選(xuan)擇(ze)是非常重要(yao)的(de)，柴(chai)(chai)油(you)(you)發(fa)電(dian)機(ji)組是一種(zhong)高壓噴射電(dian)控發(fa)電(dian)機(ji)，零部(bu)件精度很高，因此發(fa)電(dian)機(ji)廠家要(yao)求用戶對機(ji)油(you)(you)的(de)選(xuan)用一定(ding)要(yao)嚴(yan)謹，這直接關(guan)系到(dao)柴(chai)(chai)油(you)(you)發(fa)電(dian)機(ji)的(de)正常使用，在選(xuan)擇(ze)機(ji)油(you)(you)時(shi)，要(yao)根(gen)據(ju)當地(di)(di)季節和(he)(he)氣(qi)溫選(xuan)擇(ze)合適的(de)牌號機(ji)油(you)(you)，且一定(ding)要(yao)注(zhu)意機(ji)油(you)(you)質(zhi)量等(deng)級和(he)(he)粘度等(deng)級這兩個重要(yao)指(zhi)標。一般在柴(chai)(chai)油(you)(you)發(fa)動機(ji)的(de)說明書中均有規定(ding)