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(he)溫(wen)(wen)(wen)(wen)度(du)(du)控(kong)制(zhi)(zhi)器，測(ce)溫(wen)(wen)(wen)(wen)探(tan)(tan)頭(tou)為(wei)光(guang)纖(xian)測(ce)溫(wen)(wen)(wen)(wen)探(tan)(tan)頭(tou)，其預(yu)埋(mai)在繞組的(de)絕緣內部，并且和(he)繞組導體直接接觸；溫(wen)(wen)(wen)(wen)度(du)(du)控(kong)制(zhi)(zhi)器為(wei)基于光(guang)纖(xian)測(ce)溫(wen)(wen)(wen)(wen)的(de)溫(wen)(wen)(wen)(wen)度(du)(du)控(kong)制(zhi)(zhi)器；光(guang)纖(xian)測(ce)溫(wen)(wen)(wen)(wen)探(tan)(tan)頭(tou)通過光(guang)纖(xian)連接在基于光(guang)纖(xian)測(ce)溫(wen)(wen)(wen)(wen)的(de)溫(wen)(wen)(wen)(wen)度(du)(du)控(kong)制(zhi)(zhi)器的(de)信號(hao)輸入(ru)端；干(gan)式變(bian)壓(ya)器光(guang)纖(xian)測(ce)溫(wen)(wen)(wen)(wen)溫(wen)(wen)(wen)(wen)度(du)(du)控(kong)制(zhi)(zhi)器的(de)第(di)一輸出(chu)端控(kong)制(zhi)(zhi)風(feng)機的(de)啟停，第(di)二輸出(chu)端控(kong)制(zhi)(zhi)報警器超溫(wen)(wen)(wen)(wen)報警，第(di)三輸出(chu)端控(kong)制(zhi)(zhi)超溫(wen)(wen)(wen)(wen)跳閘。

熒(ying)光(guang)(guang)(guang)光(guang)(guang)(guang)纖(xian)(xian)(xian)測(ce)溫(wen)(wen)探頭為非金屬(shu)，對(dui)變壓器的特殊電場和(he)磁場沒有任何(he)影(ying)(ying)響；傳導信號的熒(ying)光(guang)(guang)(guang)光(guang)(guang)(guang)纖(xian)(xian)(xian)也為非金屬(shu)，對(dui)變壓器亦無任何(he)影(ying)(ying)響；光(guang)(guang)(guang)纖(xian)(xian)(xian)測(ce)溫(wen)(wen)探頭直(zhi)接(jie)接(jie)觸(chu)繞組導體(ti)發(fa)熱源，直(zhi)接(jie)測(ce)量導體(ti)溫(wen)(wen)度，所以(yi)，能準確反應繞組導體(ti)溫(wen)(wen)度，及時(shi)發(fa)現(xian)繞組起始故障，便于及時(shi)解決，避免更(geng)大損失發(fa)生。且即使非金屬(shu)的光(guang)(guang)(guang)纖(xian)(xian)(xian)測(ce)溫(wen)(wen)探頭和(he)光(guang)(guang)(guang)纖(xian)(xian)(xian)發(fa)生位(wei)移也不會導致短路(lu)和(he)放電現(xian)象的發(fa)生，更(geng)不會直(zhi)接(jie)對(dui)設備造成無法逆轉的損傷，延長了(le)干式變壓器的使用壽(shou)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變壓器測(ce)溫技術的不足(zu)，提供一種(zhong)結構合理、操作方(fang)便且能有效(xiao)準確地(di)檢測(ce)變壓器內部繞組熱點(dian)溫度的用于10kv配電變壓器上的光纖測(ce)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、通過(guo)光纖(xian)(xian)與光纖(xian)(xian)溫(wen)(wen)度(du)傳(chuan)感器相連的(de)光纖(xian)(xian)接線盒、用(yong)于(yu)固定光纖(xian)(xian)的(de)導(dao)(dao)線夾(jia)以及用(yong)于(yu)固定安裝所述導(dao)(dao)線夾(jia)的(de)夾(jia)件。通過(guo)在(zai)變(bian)(bian)壓器內的(de)高(gao)低壓繞(rao)(rao)組(zu)上安裝有用(yong)于(yu)檢測(ce)(ce)其熱點(dian)溫(wen)(wen)度(du)的(de)光纖(xian)(xian)溫(wen)(wen)度(du)傳(chuan)感器，工作時通過(guo)光纖(xian)(xian)溫(wen)(wen)度(du)傳(chuan)感器檢測(ce)(ce)到的(de)溫(wen)(wen)度(du)值并利用(yong)光纖(xian)(xian)回傳(chuan)至光纖(xian)(xian)接線盒內，實時對(dui)高(gao)低壓繞(rao)(rao)組(zu)進行溫(wen)(wen)度(du)監控(kong)，從可以保證變(bian)(bian)壓器處于(yu)高(gao)效運轉(zhuan)狀態。

油浸式變壓器光纖測溫系統

油(you)浸式變(bian)(bian)壓(ya)(ya)(ya)(ya)器(qi)(qi)作(zuo)(zuo)為電力(li)系(xi)統(tong)(tong)的(de)(de)(de)核心設備，其高效安(an)全(quan)運(yun)(yun)行(xing)對(dui)電力(li)行(xing)業的(de)(de)(de)運(yun)(yun)營發展起著(zhu)至關重要(yao)(yao)的(de)(de)(de)作(zuo)(zuo)用。變(bian)(bian)壓(ya)(ya)(ya)(ya)器(qi)(qi)的(de)(de)(de)工作(zuo)(zuo)壽命(ming)取決于(yu)內(nei)部(bu)(bu)絕緣性能，而熱(re)老化是其絕緣性能劣化的(de)(de)(de)主要(yao)(yao)影(ying)響因素。通過對(dui)油(you)浸式變(bian)(bian)壓(ya)(ya)(ya)(ya)器(qi)(qi)熱(re)點溫升的(de)(de)(de)預(yu)測，可直接(jie)確(que)定繞組的(de)(de)(de)最大溫度(du)(du)，了(le)解(jie)變(bian)(bian)壓(ya)(ya)(ya)(ya)器(qi)(qi)內(nei)部(bu)(bu)熱(re)狀態(tai)從而判斷其是否過熱(re)；因此，對(dui)油(you)浸式變(bian)(bian)壓(ya)(ya)(ya)(ya)器(qi)(qi)熱(re)點溫升的(de)(de)(de)準確(que)預(yu)測，是壽命(ming)評估的(de)(de)(de)基本前提，可進(jin)(jin)一(yi)步(bu)為變(bian)(bian)壓(ya)(ya)(ya)(ya)器(qi)(qi)維修(xiu)替換(huan)、容量利(li)用提供(gong)參考(kao)。變(bian)(bian)壓(ya)(ya)(ya)(ya)器(qi)(qi)運(yun)(yun)行(xing)過程(cheng)的(de)(de)(de)溫度(du)(du)檢測是保證變(bian)(bian)壓(ya)(ya)(ya)(ya)器(qi)(qi)安(an)全(quan)的(de)(de)(de)一(yi)項重要(yao)(yao)措(cuo)施。通常采用光纖(xian)溫度(du)(du)傳(chuan)感器(qi)(qi)對(dui)變(bian)(bian)壓(ya)(ya)(ya)(ya)器(qi)(qi)內(nei)部(bu)(bu)的(de)(de)(de)溫度(du)(du)進(jin)(jin)行(xing)采集(ji)。現有的(de)(de)(de)測溫系(xi)統(tong)(tong)精度(du)(du)差，無法(fa)準確(que)反映(ying)變(bian)(bian)壓(ya)(ya)(ya)(ya)器(qi)(qi)的(de)(de)(de)實(shi)(shi)際(ji)運(yun)(yun)行(xing)狀態(tai)。了(le)一(yi)種(zhong)變(bian)(bian)壓(ya)(ya)(ya)(ya)器(qi)(qi)光纖(xian)測溫系(xi)統(tong)(tong)，包括光纖(xian)測溫傳(chuan)感器(qi)(qi)，用于(yu)檢測變(bian)(bian)壓(ya)(ya)(ya)(ya)器(qi)(qi)內(nei)部(bu)(bu)不(bu)同位(wei)置的(de)(de)(de)實(shi)(shi)時溫度(du)(du)；溫度(du)(du)數(shu)據(ju)(ju)(ju)預(yu)處理模塊(kuai)(kuai)，與光纖(xian)測溫傳(chuan)感器(qi)(qi)通訊連接(jie)，用于(yu)對(dui)溫度(du)(du)數(shu)據(ju)(ju)(ju)進(jin)(jin)行(xing)篩選(xuan)；溫度(du)(du)數(shu)據(ju)(ju)(ju)合成(cheng)(cheng)模塊(kuai)(kuai)，與溫度(du)(du)數(shu)據(ju)(ju)(ju)預(yu)處理模塊(kuai)(kuai)通訊連接(jie)，用于(yu)將不(bu)同位(wei)置的(de)(de)(de)溫度(du)(du)數(shu)據(ju)(ju)(ju)進(jin)(jin)行(xing)合成(cheng)(cheng)，得(de)到變(bian)(bian)壓(ya)(ya)(ya)(ya)器(qi)(qi)的(de)(de)(de)實(shi)(shi)時運(yun)(yun)行(xing)溫度(du)(du)；溫度(du)(du)數(shu)據(ju)(ju)(ju)校正模塊(kuai)(kuai)，與溫度(du)(du)數(shu)據(ju)(ju)(ju)合成(cheng)(cheng)模塊(kuai)(kuai)通訊連接(jie)，用于(yu)對(dui)合成(cheng)(cheng)的(de)(de)(de)變(bian)(bian)壓(ya)(ya)(ya)(ya)器(qi)(qi)運(yun)(yun)行(xing)溫度(du)(du)進(jin)(jin)行(xing)校正。能夠改進(jin)(jin)傳(chuan)統(tong)(tong)測溫技術的(de)(de)(de)不(bu)足(zu)，提高了(le)變(bian)(bian)壓(ya)(ya)(ya)(ya)器(qi)(qi)溫度(du)(du)檢測的(de)(de)(de)準確(que)性。