山東聊城變壓器有限公司在確認了SGB11干式變壓器鐵(tie)(tie)芯確(que)實存(cun)在多點(dian)接(jie)(jie)地(di)故障，則應(ying)對SGB11干(gan)(gan)(gan)(gan)(gan)式(shi)(shi)(shi)(shi)變(bian)(bian)(bian)壓(ya)(ya)器(qi)(qi)的運行(xing)狀況進行(xing)分析(xi)，判斷鐵(tie)(tie)芯多點(dian)接(jie)(jie)地(di)故障的類型，以便(bian)于(yu)(yu)確(que)認應(ying)急措(cuo)施及處理方案。干(gan)(gan)(gan)(gan)(gan)式(shi)(shi)(shi)(shi)SGB11干(gan)(gan)(gan)(gan)(gan)式(shi)(shi)(shi)(shi)變(bian)(bian)(bian)壓(ya)(ya)器(qi)(qi):依靠空氣對流進行(xing)冷卻，一般用于(yu)(yu)局部(bu)照明、電子線(xian)路。機(ji)械設備等SGB11干(gan)(gan)(gan)(gan)(gan)式(shi)(shi)(shi)(shi)變(bian)(bian)(bian)壓(ya)(ya)器(qi)(qi)，在電力系統中(zhong)，一般汽機(ji)SGB11干(gan)(gan)(gan)(gan)(gan)式(shi)(shi)(shi)(shi)變(bian)(bian)(bian)壓(ya)(ya)器(qi)(qi)、鍋(guo)爐SGB11干(gan)(gan)(gan)(gan)(gan)式(shi)(shi)(shi)(shi)變(bian)(bian)(bian)壓(ya)(ya)器(qi)(qi)、除灰SGB11干(gan)(gan)(gan)(gan)(gan)式(shi)(shi)(shi)(shi)變(bian)(bian)(bian)壓(ya)(ya)器(qi)(qi)、除塵(chen)SGB11干(gan)(gan)(gan)(gan)(gan)式(shi)(shi)(shi)(shi)變(bian)(bian)(bian)壓(ya)(ya)器(qi)(qi)、脫硫(liu)SGB11干(gan)(gan)(gan)(gan)(gan)式(shi)(shi)(shi)(shi)變(bian)(bian)(bian)壓(ya)(ya)器(qi)(qi)等都(dou)是干(gan)(gan)(gan)(gan)(gan)式(shi)(shi)(shi)(shi)SGB11干(gan)(gan)(gan)(gan)(gan)式(shi)(shi)(shi)(shi)變(bian)(bian)(bian)壓(ya)(ya)器(qi)(qi)，變(bian)(bian)(bian)比為6000V/400V和10KV/400V，用于(yu)(yu)帶額定電壓(ya)(ya)380V的負(fu)載。簡單的說干(gan)(gan)(gan)(gan)(gan)式(shi)(shi)(shi)(shi)SGB11干(gan)(gan)(gan)(gan)(gan)式(shi)(shi)(shi)(shi)變(bian)(bian)(bian)壓(ya)(ya)器(qi)(qi)就(jiu)是指鐵(tie)(tie)芯和繞組不浸漬在絕緣油中(zhong)的SGB11干(gan)(gan)(gan)(gan)(gan)式(shi)(shi)(shi)(shi)變(bian)(bian)(bian)壓(ya)(ya)器(qi)(qi)。

首先(xian)應查詢SGB11干(gan)(gan)式變(bian)壓(ya)(ya)器(qi)投運的時間(jian)、負荷情況、有(you)無突(tu)發故(gu)障(zhang)或沖擊等(deng)，其(qi)次是SGB11干(gan)(gan)式變(bian)壓(ya)(ya)器(qi)歷(li)史運行情況，安裝試驗記錄等(deng)，綜(zong)合(he)以(yi)上(shang)因素再結合(he)色(se)譜(pu)(pu)分析、電氣試驗數(shu)據(ju)進(jin)行判(pan)斷，確認鐵芯(xin)接地(di)(di)故(gu)障(zhang)的類(lei)型。如SGB11干(gan)(gan)式變(bian)壓(ya)(ya)器(qi)鐵芯(xin)電阻(zu)突(tu)然降低，色(se)譜(pu)(pu)分析數(shu)據(ju)無異常(chang)，而SGB11干(gan)(gan)式變(bian)壓(ya)(ya)器(qi)長時間(jian)沒有(you)運行，則可(ke)能是由于油(you)泥沉淀導致鐵芯(xin)多(duo)點接地(di)(di)，屬于不穩定(ding)接地(di)(di)故(gu)障(zhang)，對應采(cai)取措施消除即可(ke)。

非晶態(tai)導磁(ci)材料具有磁(ci)導率(lv)高、電(dian)(dian)阻(zu)率(lv)大和鐵損(sun)小(xiao)等(deng)優(you)點(dian)，采用(yong)非晶態(tai)合(he)金(jin)作(zuo)(zuo)為鐵芯(xin)材料的配(pei)電(dian)(dian)SGB11干(gan)式變(bian)(bian)(bian)壓(ya)器(qi)。其空載損(sun)耗可比同容(rong)量的硅鋼鐵芯(xin)SGB11干(gan)式變(bian)(bian)(bian)壓(ya)器(qi)降(jiang)低    60％～80％，目(mu)前非晶態(tai)SGB11干(gan)式變(bian)(bian)(bian)壓(ya)器(qi)容(rong)量1600kVA以下主(zhu)要作(zuo)(zuo)為配(pei)電(dian)(dian)SGB11干(gan)式變(bian)(bian)(bian)壓(ya)器(qi)，用(yong)于工礦(kuang)企業、農村電(dian)(dian)網、配(pei)電(dian)(dian)系(xi)(xi)統，但由于受制(zhi)造工藝的限制(zhi)，非晶態(tai)SGB11干(gan)式變(bian)(bian)(bian)壓(ya)器(qi)產(chan)品目(mu)前的容(rong)量還較(jiao)小(xiao)，不(bu)能(neng)作(zuo)(zuo)為電(dian)(dian)力SGB11干(gan)式變(bian)(bian)(bian)壓(ya)器(qi)使用(yong)在輸變(bian)(bian)(bian)電(dian)(dian)系(xi)(xi)統。

根據試(shi)驗電(dian)(dian)壓(ya)(ya)的(de)(de)(de)要(yao)求，應適當(dang)選擇(ze)放電(dian)(dian)量(liang)小的(de)(de)(de)支撐SGB11干式變壓(ya)(ya)器(qi)的(de)(de)(de)容量(liang)和電(dian)(dian)壓(ya)(ya)等級，并進行必要(yao)的(de)(de)(de)電(dian)(dian)容補(bu)(bu)償(chang)。電(dian)(dian)容補(bu)(bu)償(chang)的(de)(de)(de)原(yuan)則是根據勵磁(ci)電(dian)(dian)流值(zhi)(zhi)來確定的(de)(de)(de)。對一臺15000kVA/220kVSGB11干式變壓(ya)(ya)器(qi)實測時，若需施加150kV試(shi)驗電(dian)(dian)壓(ya)(ya)(相對地(di)有效值(zhi)(zhi))，則可(ke)選擇(ze)支撐SGB11干式變壓(ya)(ya)器(qi)參數為100kVA/50kV，此(ci)時補(bu)(bu)償(chang)電(dian)(dian)容約為0.04μF.

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在確(que)認了SGB11干式(shi)變(bian)壓(ya)器(qi)鐵芯多點(dian)接(jie)(jie)地故(gu)障的類型后，應(ying)(ying)根據現(xian)場情(qing)況及故(gu)障類型采取(qu)應(ying)(ying)急措施，從而排除(chu)不(bu)穩定接(jie)(jie)地或限制故(gu)障的發展(zhan)。

對于(yu)不穩定接(jie)(jie)地故(gu)障(zhang)(zhang)，在設備停運的情況(kuang)下，可(ke)采用電(dian)(dian)容(rong)放電(dian)(dian)沖(chong)擊法排除(chu)故(gu)障(zhang)(zhang)，方(fang)法如下：如圖一(yi)，將(jiang)K接(jie)(jie)于(yu)鐵(tie)(tie)芯(xin)(xin)正(zheng)常(chang)接(jie)(jie)地點（SGB11干式變(bian)壓(ya)(ya)器鐵(tie)(tie)芯(xin)(xin)接(jie)(jie)地引出線斷開），利用兆歐表對電(dian)(dian)容(rong)進(jin)行充(chong)電(dian)(dian)約60S后(hou)，將(jiang)刀閘開關K倒向放電(dian)(dian)回(hui)路(lu)，電(dian)(dian)容(rong)對鐵(tie)(tie)芯(xin)(xin)接(jie)(jie)地故(gu)障(zhang)(zhang)點放電(dian)(dian)，然后(hou)測試鐵(tie)(tie)芯(xin)(xin)絕緣電(dian)(dian)阻(zu)，如電(dian)(dian)阻(zu)值(zhi)恢復正(zheng)常(chang)則故(gu)障(zhang)(zhang)排除(chu)，否則重復充(chong)放電(dian)(dian)過(guo)程幾次即可(ke)排除(chu)故(gu)障(zhang)(zhang)。由于(yu)SGB11干式變(bian)壓(ya)(ya)器鐵(tie)(tie)芯(xin)(xin)底部絕緣墊(dian)塊較薄，采取的沖(chong)擊電(dian)(dian)流不宜過(guo)大，避免發(fa)生擊穿。

HWBR繞組變(bian)形(xing)測(ce)(ce)試儀用(yong)于測(ce)(ce)試6KV及以上電(dian)壓等級(ji)電(dian)力(li)SGB11干式(shi)(shi)變(bian)壓器(qi)及其它特(te)(te)殊用(yong)途(tu)的(de)SGB11干式(shi)(shi)變(bian)壓器(qi)，電(dian)力(li)SGB11干式(shi)(shi)變(bian)壓器(qi)在(zai)運(yun)行(xing)或(huo)者(zhe)運(yun)輸過程中不可避免地要(yao)遭受各種故障短(duan)路(lu)電(dian)流的(de)沖擊或(huo)者(zhe)物理撞擊，在(zai)短(duan)路(lu)電(dian)流產生的(de)強大電(dian)動力(li)作(zuo)用(yong)下，SGB11干式(shi)(shi)變(bian)壓器(qi)繞組可能失去穩定性(xing)，導致局部扭曲、鼓(gu)包或(huo)移位等永久變(bian)形(xing)現象，這(zhe)樣(yang)將(jiang)嚴重影響SGB11干式(shi)(shi)變(bian)壓器(qi)的(de)安全運(yun)行(xing)。按國家電(dian)力(li)行(xing)業(ye)標準DL/T911－2004采用(yong)頻(pin)率(lv)響應(ying)分析法測(ce)(ce)量SGB11干式(shi)(shi)變(bian)壓器(qi)的(de)繞組變(bian)形(xing)，是通(tong)過檢(jian)(jian)測(ce)(ce)SGB11干式(shi)(shi)變(bian)壓器(qi)各個繞組的(de)幅頻(pin)響應(ying)特(te)(te)性(xing)，并對檢(jian)(jian)測(ce)(ce)結(jie)果進行(xing)縱向或(huo)橫向比較(jiao)，根據幅頻(pin)響應(ying)特(te)(te)性(xing)的(de)變(bian)化程度，判斷SGB11干式(shi)(shi)變(bian)壓器(qi)可能發(fa)生的(de)繞組變(bian)形(xing)。