一旦局(ju)部放(fang)電(dian)(dian)(dian)開(kai)始，絕(jue)緣(yuan)材(cai)料就(jiu)會逐漸劣化(hua)，**終可能導(dao)致絕(jue)緣(yuan)失效。精心設(she)計(ji)和質量材(cai)料可防止局(ju)部放(fang)電(dian)(dian)(dian)。在(zai)高壓設(she)備(bei)中，絕(jue)緣(yuan)的完(wan)整性通過在(zai)制造過程(cheng)中和設(she)備(bei)使用壽命(ming)期(qi)間定期(qi)使用局(ju)部放(fang)電(dian)(dian)(dian)檢(jian)測(ce)設(she)備(bei)來驗(yan)證。局(ju)部放(fang)電(dian)(dian)(dian)預防和檢(jian)測(ce)對于確保高壓公用事業設(she)備(bei)長(chang)期(qi)可靠運行(xing)至關(guan)重要。局(ju)部放(fang)電(dian)(dian)(dian)等效電(dian)(dian)(dian)路具有腔(qiang)體的電(dian)(dian)(dian)介質的等效電(dian)(dian)(dian)路可以建模為與(yu)另一個(ge)電(dian)(dian)(dian)容(rong)器(qi)并(bing)(bing)聯(lian)的電(dian)(dian)(dian)容(rong)分壓器(qi)。分壓器(qi)的頂部電(dian)(dian)(dian)容(rong)**串聯(lian)電(dian)(dian)(dian)容(rong)與(yu)腔(qiang)體的并(bing)(bing)聯(lian)，底(di)部電(dian)(dian)(dian)容(rong)**間隙電(dian)(dian)(dian)容(rong)。并(bing)(bing)聯(lian)電(dian)(dian)(dian)容(rong)器(qi)**不受腔(qiang)體影響的剩余(yu)電(dian)(dian)(dian)容(rong)。如(ru)何(he)阻止局(ju)部放(fang)電(dian)(dian)(dian)？杭州(zhou)國洲電(dian)(dian)(dian)力科技有限公司(si)。超高壓局(ju)部放(fang)電(dian)(dian)(dian)監測(ce)的基本原理

GZFZ-G系列(lie)GIS局(ju)(ju)部放(fang)(fang)電(dian)檢測(ce)(ce)教研裝(zhuang)置技(ji)術(shu)說(shuo)明，一、概述在GIS制造、裝(zhuang)配、運(yun)輸以及(ji)運(yun)行(xing)過程中(zhong)(zhong)，由于加工不良、碰撞、沖擊(ji)、分合操作(zuo)等因素(su)，其內(nei)部會產生絕(jue)(jue)緣(yuan)缺陷(xian)。在試(shi)驗(yan)電(dian)壓或額定電(dian)壓作(zuo)用下，當絕(jue)(jue)緣(yuan)缺陷(xian)處(chu)集中(zhong)(zhong)的(de)(de)電(dian)場強(qiang)度達(da)到(dao)該(gai)區域的(de)(de)擊(ji)穿場強(qiang)時(shi)，就會出(chu)現(xian)局(ju)(ju)部放(fang)(fang)電(dian)（Partialdischarge,PD）現(xian)象。局(ju)(ju)部放(fang)(fang)電(dian)是(shi)GIS絕(jue)(jue)緣(yuan)劣化(hua)的(de)(de)主要原(yuan)因，也是(shi)GIS絕(jue)(jue)緣(yuan)故障的(de)(de)先兆(zhao)。因此，在線監(jian)(jian)測(ce)(ce)局(ju)(ju)部放(fang)(fang)電(dian)信號可(ke)在故障前檢測(ce)(ce)出(chu)絕(jue)(jue)緣(yuan)缺陷(xian)，是(shi)確(que)保GIS以及(ji)電(dian)力系統安全(quan)穩定運(yun)行(xing)的(de)(de)重(zhong)要手段(duan)。超高壓局(ju)(ju)部放(fang)(fang)電(dian)監(jian)(jian)測(ce)(ce)的(de)(de)基本原(yuan)理杭州國洲電(dian)力科(ke)技(ji)有限公司振動聲紋在線監(jian)(jian)測(ce)(ce)技(ji)術(shu)交(jiao)流。

根(gen)據上述結果不(bu)難(nan)看出，3#、6#、9#監測(ce)單元測(ce)得超(chao)聲波信(xin)號幅值分別(bie)為0.212mV、0.152mV、0.117mV，其中在3#位(wei)(wei)置(zhi)(zhi)測(ce)得的(de)信(xin)號強(qiang)度比較大，其次為6#和(he)9#位(wei)(wei)置(zhi)(zhi)。此外從(cong)時間(jian)軸(zhou)上看，也是(shi)3#位(wei)(wei)置(zhi)(zhi)較早出現信(xin)號，其次為6#和(he)9#位(wei)(wei)置(zhi)(zhi)，故(gu)無論是(shi)根(gen)據信(xin)號強(qiang)度還(huan)是(shi)傳播時差(cha)，均可判斷放電發生在3#位(wei)(wei)置(zhi)(zhi)的(de)左(zuo)側(ce)。7#位(wei)(wei)置(zhi)(zhi)在另一個氣室，由于(yu)期間(jian)的(de)盆式絕(jue)緣子(zi)會對超(chao)聲波局(ju)部放電信(xin)號造成較大的(de)衰減，故(gu)基本監測(ce)不(bu)到明(ming)顯(xian)的(de)信(xin)號，進一步證明(ming)放電應(ying)發生在3#位(wei)(wei)置(zhi)(zhi)的(de)左(zuo)側(ce)。

2.11Q/GDW11304.5電(dian)(dian)(dian)(dian)(dian)(dian)(dian)力設備(bei)帶(dai)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)檢(jian)(jian)測(ce)(ce)(ce)儀(yi)器(qi)技(ji)(ji)術規范(fan)(fan)第(di)5部分(fen)：高(gao)(gao)頻法(fa)局(ju)部放(fang)(fang)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)帶(dai)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)檢(jian)(jian)測(ce)(ce)(ce)儀(yi)；2.12Q/GDW11304.8電(dian)(dian)(dian)(dian)(dian)(dian)(dian)力設備(bei)帶(dai)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)檢(jian)(jian)測(ce)(ce)(ce)儀(yi)器(qi)技(ji)(ji)術規范(fan)(fan)第(di)8部分(fen)：特(te)高(gao)(gao)頻法(fa)局(ju)部放(fang)(fang)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)帶(dai)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)檢(jian)(jian)測(ce)(ce)(ce)儀(yi)；2.13Q/GDW11304.9電(dian)(dian)(dian)(dian)(dian)(dian)(dian)力設備(bei)帶(dai)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)檢(jian)(jian)測(ce)(ce)(ce)儀(yi)器(qi)技(ji)(ji)術規范(fan)(fan)第(di)9部分(fen)：超聲法(fa)局(ju)部放(fang)(fang)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)帶(dai)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)檢(jian)(jian)測(ce)(ce)(ce)儀(yi)；2.14Q/GDW11304.16電(dian)(dian)(dian)(dian)(dian)(dian)(dian)力設備(bei)帶(dai)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)檢(jian)(jian)測(ce)(ce)(ce)儀(yi)器(qi)技(ji)(ji)術規范(fan)(fan)第(di)16部分(fen)：暫態地電(dian)(dian)(dian)(dian)(dian)(dian)(dian)壓(ya)(ya)法(fa)帶(dai)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)檢(jian)(jian)測(ce)(ce)(ce)儀(yi)；2.15Q/CSG11401氣(qi)體(ti)絕緣金屬封(feng)閉(bi)開關設備(bei)（GIS）局(ju)部放(fang)(fang)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)特(te)高(gao)(gao)頻檢(jian)(jian)測(ce)(ce)(ce)技(ji)(ji)術規范(fan)(fan)；2.16Q/CSG201010kV～35kV高(gao)(gao)壓(ya)(ya)開關柜局(ju)部放(fang)(fang)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)帶(dai)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)測(ce)(ce)(ce)試裝置(zhi)技(ji)(ji)術規范(fan)(fan)；2.17Q/CSG11006數(shu)字(zi)化變電(dian)(dian)(dian)(dian)(dian)(dian)(dian)站技(ji)(ji)術規范(fan)(fan)；2.18Q/CSG10010輸變電(dian)(dian)(dian)(dian)(dian)(dian)(dian)設備(bei)狀(zhuang)態診(zhen)斷(duan)標準(zhun)；2.19IEC60270High-voltagetesttechniques–Partialdischargemeasurements；2.20IEC62478High-voltagetesttechniques–MeasurementofPDbyUHFandAEmethods；2.21IEEEGuidefortheDetectionandLocationofAcousticEmissionsformPDinOil-ImmersedPowerTransformersandReactors；2.22CIGREWorkingGroupD1.27Guidelinesforpartialdischargedetectionusingconventional(IEC60270)andunconventionalmethods。GZPD-4D型分(fen)布式高(gao)(gao)壓(ya)(ya)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)纜(lan)局(ju)部放(fang)(fang)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)監測(ce)(ce)(ce)與評價系統系統構(gou)成及功能參數(shu)。

三、監測(ce)(ce)(ce)系統(tong)的(de)(de)構成(cheng)組(zu)件圖(tu)2:GZPD-234系列(lie)便攜式(shi)(shi)局部放(fang)電(dian)(dian)監測(ce)(ce)(ce)與(yu)(yu)診斷(duan)系統(tong)主機(ji)(ji)（左(zuo)(zuo)上圖(tu)為3通道(dao)的(de)(de)分(fen)體(ti)式(shi)(shi)主機(ji)(ji)、左(zuo)(zuo)下圖(tu)為3通道(dao)的(de)(de)與(yu)(yu)防護箱整體(ti)式(shi)(shi)主機(ji)(ji)）、系統(tong)軟件主界面。GZPD-234系列(lie)便攜式(shi)(shi)局部放(fang)電(dian)(dian)監測(ce)(ce)(ce)與(yu)(yu)診斷(duan)系統(tong)構成(cheng)如下圖(tu)3所示，包括下列(lie)4類組(zu)件：1、感知(zhi)單元(yuan)：高頻(pin)脈沖電(dian)(dian)流(liu)傳(chuan)感器(qi)、特高頻(pin)傳(chuan)感器(qi)、暫(zan)態(tai)地電(dian)(dian)壓傳(chuan)感器(qi)、超(chao)聲(sheng)波傳(chuan)感器(qi)、射頻(pin)傳(chuan)感器(qi)，以及特高頻(pin)、暫(zan)態(tai)地電(dian)(dian)壓、超(chao)聲(sheng)波三合(he)一的(de)(de)傳(chuan)感器(qi)；2、同(tong)(tong)步(bu)(bu)單元(yuan)：支持(chi)線圈(quan)同(tong)(tong)步(bu)(bu)、無(wu)線同(tong)(tong)步(bu)(bu)及內同(tong)(tong)步(bu)(bu)；3、監測(ce)(ce)(ce)主機(ji)(ji)：具備信號放(fang)大、濾波、A/D轉換功能，支持(chi)多通道(dao)同(tong)(tong)步(bu)(bu)的(de)(de)實時采集；手持(chi)式(shi)(shi)局部放(fang)電(dian)(dian)監測(ce)(ce)(ce)技術怎么樣(yang)？超(chao)高壓局部放(fang)電(dian)(dian)監測(ce)(ce)(ce)的(de)(de)基本(ben)原理(li)

局放儀還應采取哪些措(cuo)施(shi)？超高壓局部放電監測的基本原理

九、在線(xian)(xian)(xian)局(ju)(ju)部(bu)(bu)(bu)(bu)放(fang)(fang)(fang)電(dian)(dian)(dian)(dian)與重(zhong)癥監(jian)(jian)護的區(qu)別？在線(xian)(xian)(xian)局(ju)(ju)部(bu)(bu)(bu)(bu)放(fang)(fang)(fang)電(dian)(dian)(dian)(dian)監(jian)(jian)測適(shi)用(yong)(yong)于(yu)監(jian)(jian)測重(zhong)點線(xian)(xian)(xian)路(lu)；重(zhong)癥局(ju)(ju)部(bu)(bu)(bu)(bu)放(fang)(fang)(fang)電(dian)(dian)(dian)(dian)監(jian)(jian)測適(shi)用(yong)(yong)于(yu)局(ju)(ju)部(bu)(bu)(bu)(bu)放(fang)(fang)(fang)電(dian)(dian)(dian)(dian)量(liang)偏小的電(dian)(dian)(dian)(dian)纜線(xian)(xian)(xian)路(lu)，以(yi)便(bian)于(yu)觀察局(ju)(ju)部(bu)(bu)(bu)(bu)放(fang)(fang)(fang)電(dian)(dian)(dian)(dian)信號發(fa)展趨勢。十(shi)、同(tong)步(bu)局(ju)(ju)部(bu)(bu)(bu)(bu)放(fang)(fang)(fang)電(dian)(dian)(dian)(dian)對(dui)(dui)耐(nai)(nai)壓設備有要求(qiu)嗎？耐(nai)(nai)壓設備需使(shi)用(yong)(yong)無局(ju)(ju)部(bu)(bu)(bu)(bu)放(fang)(fang)(fang)電(dian)(dian)(dian)(dian)電(dian)(dian)(dian)(dian)源，并進行(xing)(xing)無局(ju)(ju)部(bu)(bu)(bu)(bu)放(fang)(fang)(fang)電(dian)(dian)(dian)(dian)處(chu)理(li)。高壓電(dian)(dian)(dian)(dian)纜交流耐(nai)(nai)壓采用(yong)(yong)的是(shi)變頻(pin)諧(xie)振(zhen)裝(zhuang)置產生試驗(yan)(yan)電(dian)(dian)(dian)(dian)源，變頻(pin)柜(ju)是(shi)裝(zhuang)置的**部(bu)(bu)(bu)(bu)件，變頻(pin)柜(ju)通(tong)(tong)過晶閘管的整(zheng)流和逆變獲取(qu)試驗(yan)(yan)所需的頻(pin)率，在電(dian)(dian)(dian)(dian)源變換(huan)過程中引(yin)入了大量(liang)的高頻(pin)脈(mo)沖(chong)電(dian)(dian)(dian)(dian)流成份(fen)。變頻(pin)諧(xie)振(zhen)系統輸出的電(dian)(dian)(dian)(dian)源不能直(zhi)接作為(wei)電(dian)(dian)(dian)(dian)纜局(ju)(ju)部(bu)(bu)(bu)(bu)放(fang)(fang)(fang)電(dian)(dian)(dian)(dian)試驗(yan)(yan)的電(dian)(dian)(dian)(dian)源直(zhi)接施加于(yu)被試對(dui)(dui)象進行(xing)(xing)局(ju)(ju)部(bu)(bu)(bu)(bu)放(fang)(fang)(fang)電(dian)(dian)(dian)(dian)監(jian)(jian)測，必須(xu)采取(qu)有效措施對(dui)(dui)試驗(yan)(yan)電(dian)(dian)(dian)(dian)源進行(xing)(xing)預(yu)處(chu)理(li)，通(tong)(tong)過設置串(chuan)聯電(dian)(dian)(dian)(dian)抗、防暈導線(xian)(xian)(xian)、均壓環進行(xing)(xing)對(dui)(dui)試驗(yan)(yan)電(dian)(dian)(dian)(dian)源質(zhi)量(liang)進行(xing)(xing)改善，其(qi)電(dian)(dian)(dian)(dian)氣(qi)原(yuan)(yuan)理(li)所下圖所示：超(chao)高壓局(ju)(ju)部(bu)(bu)(bu)(bu)放(fang)(fang)(fang)電(dian)(dian)(dian)(dian)監(jian)(jian)測的基本(ben)原(yuan)(yuan)理(li)

本(ben)文來(lai)自沈陽(yang)喜納多(duo)采暖工程有(you)限公(gong)司：//zjlong.cn/Article/88a399729.html