干式變壓器光纖測溫系統原理

干式變壓器光纖測溫，包括干式變壓器鐵芯、絕緣件、澆注成型的絕緣和導體的繞組、壓緊裝置、光纖測溫探頭和溫(wen)(wen)度(du)(du)(du)控(kong)(kong)制(zhi)器(qi)(qi)，測溫(wen)(wen)探(tan)頭為光纖(xian)(xian)測溫(wen)(wen)探(tan)頭，其預(yu)埋在(zai)繞組的(de)(de)絕(jue)緣(yuan)內部，并且和繞組導(dao)體直接接觸；溫(wen)(wen)度(du)(du)(du)控(kong)(kong)制(zhi)器(qi)(qi)為基于光纖(xian)(xian)測溫(wen)(wen)的(de)(de)溫(wen)(wen)度(du)(du)(du)控(kong)(kong)制(zhi)器(qi)(qi)；光纖(xian)(xian)測溫(wen)(wen)探(tan)頭通過光纖(xian)(xian)連接在(zai)基于光纖(xian)(xian)測溫(wen)(wen)的(de)(de)溫(wen)(wen)度(du)(du)(du)控(kong)(kong)制(zhi)器(qi)(qi)的(de)(de)信號輸(shu)入端(duan)；干式變壓(ya)器(qi)(qi)光纖(xian)(xian)測溫(wen)(wen)溫(wen)(wen)度(du)(du)(du)控(kong)(kong)制(zhi)器(qi)(qi)的(de)(de)第(di)(di)(di)一輸(shu)出(chu)端(duan)控(kong)(kong)制(zhi)風機的(de)(de)啟停，第(di)(di)(di)二輸(shu)出(chu)端(duan)控(kong)(kong)制(zhi)報(bao)警(jing)器(qi)(qi)超溫(wen)(wen)報(bao)警(jing)，第(di)(di)(di)三(san)輸(shu)出(chu)端(duan)控(kong)(kong)制(zhi)超溫(wen)(wen)跳(tiao)閘。

熒光光纖(xian)(xian)測(ce)溫(wen)探頭(tou)為非(fei)金(jin)屬(shu)，對(dui)(dui)變(bian)壓器的特(te)殊電場和(he)磁場沒有任何影響；傳導信號的熒光光纖(xian)(xian)也(ye)為非(fei)金(jin)屬(shu)，對(dui)(dui)變(bian)壓器亦無任何影響；光纖(xian)(xian)測(ce)溫(wen)探頭(tou)直接(jie)(jie)(jie)接(jie)(jie)(jie)觸繞(rao)組導體發(fa)熱源，直接(jie)(jie)(jie)測(ce)量導體溫(wen)度，所以，能準確反(fan)應繞(rao)組導體溫(wen)度，及時(shi)(shi)發(fa)現繞(rao)組起始故(gu)障，便于及時(shi)(shi)解決，避(bi)免更(geng)(geng)大損失發(fa)生。且即使非(fei)金(jin)屬(shu)的光纖(xian)(xian)測(ce)溫(wen)探頭(tou)和(he)光纖(xian)(xian)發(fa)生位移也(ye)不會導致短路和(he)放(fang)電現象的發(fa)生，更(geng)(geng)不會直接(jie)(jie)(jie)對(dui)(dui)設備造成無法逆轉(zhuan)的損傷，延長了(le)干式變(bian)壓器的使用壽命。

變壓器熱點溫度監測裝置，變壓器光纖測溫系統設置安裝的必要性

變壓器故障類型主要有熱故障和電氣故障，其中熱故障占總故障臺數的 60%左右，過熱兼高能放電故障占 10% 左右。油浸式變壓器壽命主要取決于絕緣材料的壽命，而促使絕緣材料老化的決定性因素就是溫度，因此變壓器熱點溫度決定了變壓器的使用壽命。過去由于變壓器內絕緣要求和內部的強電磁干擾，熱點部位的溫度無法監測。出于安全考慮，國內變壓器大都處于 50%~70% 額定功率下、非經濟運行狀況。為此過去都是通過在套管下部安裝電流互感器，回傳模擬信號的辦法測量變壓器的繞組熱點溫度，誤差較大。因此，福州華光天銳光電科技有限公司自主研發的能有效準確檢測變壓器內部繞組溫度的熱點溫度的光纖測溫技術的系統，克服傳統pt100變壓(ya)器測溫技術的(de)不足，提(ti)供一種結構合理、操(cao)作方便且能有效準確地檢測變壓(ya)器內部繞組熱點(dian)溫度的(de)用(yong)于10kv配電變壓(ya)器上的(de)光纖測溫主機。

油浸式變壓器光纖測溫原理

變壓器光纖測溫系統包括高低壓繞組，還包括安裝于高低壓繞組上的傳感器油道撐條、用于檢測高低壓繞組內線圈溫度的光纖溫度傳感器、通(tong)過光(guang)纖(xian)與光(guang)纖(xian)溫度(du)(du)(du)傳(chuan)(chuan)感器(qi)相連的光(guang)纖(xian)接(jie)線(xian)(xian)盒、用(yong)(yong)于(yu)固定光(guang)纖(xian)的導線(xian)(xian)夾(jia)以(yi)及用(yong)(yong)于(yu)固定安(an)裝(zhuang)所述導線(xian)(xian)夾(jia)的夾(jia)件。通(tong)過在變壓(ya)(ya)(ya)器(qi)內(nei)的高低壓(ya)(ya)(ya)繞組(zu)上安(an)裝(zhuang)有用(yong)(yong)于(yu)檢測其(qi)熱點溫度(du)(du)(du)的光(guang)纖(xian)溫度(du)(du)(du)傳(chuan)(chuan)感器(qi)，工作時通(tong)過光(guang)纖(xian)溫度(du)(du)(du)傳(chuan)(chuan)感器(qi)檢測到(dao)的溫度(du)(du)(du)值并利用(yong)(yong)光(guang)纖(xian)回傳(chuan)(chuan)至光(guang)纖(xian)接(jie)線(xian)(xian)盒內(nei)，實時對高低壓(ya)(ya)(ya)繞組(zu)進行溫度(du)(du)(du)監控(kong)，從可(ke)以(yi)保證(zheng)變壓(ya)(ya)(ya)器(qi)處(chu)于(yu)高效(xiao)運轉狀態。

油浸式變壓器光纖測溫系統

油(you)(you)(you)浸式變(bian)(bian)(bian)壓(ya)(ya)(ya)器(qi)作(zuo)為電(dian)力系(xi)統的(de)(de)(de)(de)(de)核心設備，其(qi)高效(xiao)安全運(yun)(yun)(yun)行(xing)對(dui)電(dian)力行(xing)業的(de)(de)(de)(de)(de)運(yun)(yun)(yun)營(ying)發(fa)展起(qi)著至關重要的(de)(de)(de)(de)(de)作(zuo)用。變(bian)(bian)(bian)壓(ya)(ya)(ya)器(qi)的(de)(de)(de)(de)(de)工作(zuo)壽命取決于(yu)內(nei)部(bu)絕(jue)緣性(xing)能(neng)，而(er)熱(re)老化是(shi)其(qi)絕(jue)緣性(xing)能(neng)劣化的(de)(de)(de)(de)(de)主要影響因素。通過(guo)(guo)對(dui)油(you)(you)(you)浸式變(bian)(bian)(bian)壓(ya)(ya)(ya)器(qi)熱(re)點溫(wen)(wen)(wen)(wen)(wen)(wen)(wen)(wen)升(sheng)的(de)(de)(de)(de)(de)預(yu)測(ce)(ce)(ce)，可直接(jie)確(que)定繞組(zu)的(de)(de)(de)(de)(de)最大溫(wen)(wen)(wen)(wen)(wen)(wen)(wen)(wen)度(du)(du)(du)，了(le)解變(bian)(bian)(bian)壓(ya)(ya)(ya)器(qi)內(nei)部(bu)熱(re)狀態從而(er)判斷其(qi)是(shi)否過(guo)(guo)熱(re)；因此，對(dui)油(you)(you)(you)浸式變(bian)(bian)(bian)壓(ya)(ya)(ya)器(qi)熱(re)點溫(wen)(wen)(wen)(wen)(wen)(wen)(wen)(wen)升(sheng)的(de)(de)(de)(de)(de)準確(que)預(yu)測(ce)(ce)(ce)，是(shi)壽命評估的(de)(de)(de)(de)(de)基本前提(ti)(ti)，可進(jin)(jin)一(yi)步(bu)為變(bian)(bian)(bian)壓(ya)(ya)(ya)器(qi)維(wei)修替換(huan)、容(rong)量利(li)用提(ti)(ti)供參考。變(bian)(bian)(bian)壓(ya)(ya)(ya)器(qi)運(yun)(yun)(yun)行(xing)過(guo)(guo)程的(de)(de)(de)(de)(de)溫(wen)(wen)(wen)(wen)(wen)(wen)(wen)(wen)度(du)(du)(du)檢測(ce)(ce)(ce)是(shi)保證變(bian)(bian)(bian)壓(ya)(ya)(ya)器(qi)安全的(de)(de)(de)(de)(de)一(yi)項重要措(cuo)施。通常采(cai)用光(guang)(guang)纖溫(wen)(wen)(wen)(wen)(wen)(wen)(wen)(wen)度(du)(du)(du)傳(chuan)感器(qi)對(dui)變(bian)(bian)(bian)壓(ya)(ya)(ya)器(qi)內(nei)部(bu)的(de)(de)(de)(de)(de)溫(wen)(wen)(wen)(wen)(wen)(wen)(wen)(wen)度(du)(du)(du)進(jin)(jin)行(xing)采(cai)集。現有的(de)(de)(de)(de)(de)測(ce)(ce)(ce)溫(wen)(wen)(wen)(wen)(wen)(wen)(wen)(wen)系(xi)統精度(du)(du)(du)差，無(wu)法準確(que)反映變(bian)(bian)(bian)壓(ya)(ya)(ya)器(qi)的(de)(de)(de)(de)(de)實(shi)際運(yun)(yun)(yun)行(xing)狀態。了(le)一(yi)種變(bian)(bian)(bian)壓(ya)(ya)(ya)器(qi)光(guang)(guang)纖測(ce)(ce)(ce)溫(wen)(wen)(wen)(wen)(wen)(wen)(wen)(wen)系(xi)統，包(bao)括光(guang)(guang)纖測(ce)(ce)(ce)溫(wen)(wen)(wen)(wen)(wen)(wen)(wen)(wen)傳(chuan)感器(qi)，用于(yu)檢測(ce)(ce)(ce)變(bian)(bian)(bian)壓(ya)(ya)(ya)器(qi)內(nei)部(bu)不(bu)同位置的(de)(de)(de)(de)(de)實(shi)時(shi)溫(wen)(wen)(wen)(wen)(wen)(wen)(wen)(wen)度(du)(du)(du)；溫(wen)(wen)(wen)(wen)(wen)(wen)(wen)(wen)度(du)(du)(du)數(shu)據預(yu)處理模(mo)(mo)塊(kuai)，與光(guang)(guang)纖測(ce)(ce)(ce)溫(wen)(wen)(wen)(wen)(wen)(wen)(wen)(wen)傳(chuan)感器(qi)通訊連接(jie)，用于(yu)對(dui)溫(wen)(wen)(wen)(wen)(wen)(wen)(wen)(wen)度(du)(du)(du)數(shu)據進(jin)(jin)行(xing)篩(shai)選；溫(wen)(wen)(wen)(wen)(wen)(wen)(wen)(wen)度(du)(du)(du)數(shu)據合(he)成(cheng)模(mo)(mo)塊(kuai)，與溫(wen)(wen)(wen)(wen)(wen)(wen)(wen)(wen)度(du)(du)(du)數(shu)據預(yu)處理模(mo)(mo)塊(kuai)通訊連接(jie)，用于(yu)將不(bu)同位置的(de)(de)(de)(de)(de)溫(wen)(wen)(wen)(wen)(wen)(wen)(wen)(wen)度(du)(du)(du)數(shu)據進(jin)(jin)行(xing)合(he)成(cheng)，得到變(bian)(bian)(bian)壓(ya)(ya)(ya)器(qi)的(de)(de)(de)(de)(de)實(shi)時(shi)運(yun)(yun)(yun)行(xing)溫(wen)(wen)(wen)(wen)(wen)(wen)(wen)(wen)度(du)(du)(du)；溫(wen)(wen)(wen)(wen)(wen)(wen)(wen)(wen)度(du)(du)(du)數(shu)據校正(zheng)模(mo)(mo)塊(kuai)，與溫(wen)(wen)(wen)(wen)(wen)(wen)(wen)(wen)度(du)(du)(du)數(shu)據合(he)成(cheng)模(mo)(mo)塊(kuai)通訊連接(jie)，用于(yu)對(dui)合(he)成(cheng)的(de)(de)(de)(de)(de)變(bian)(bian)(bian)壓(ya)(ya)(ya)器(qi)運(yun)(yun)(yun)行(xing)溫(wen)(wen)(wen)(wen)(wen)(wen)(wen)(wen)度(du)(du)(du)進(jin)(jin)行(xing)校正(zheng)。能(neng)夠改進(jin)(jin)傳(chuan)統測(ce)(ce)(ce)溫(wen)(wen)(wen)(wen)(wen)(wen)(wen)(wen)技術的(de)(de)(de)(de)(de)不(bu)足，提(ti)(ti)高了(le)變(bian)(bian)(bian)壓(ya)(ya)(ya)器(qi)溫(wen)(wen)(wen)(wen)(wen)(wen)(wen)(wen)度(du)(du)(du)檢測(ce)(ce)(ce)的(de)(de)(de)(de)(de)準確(que)性(xing)。