光纖光柵測溫系統

對(dui)電(dian)力(li)系統(tong)設備出現(xian)的過熱(re)(re)故障進行(xing)分類，包括(kuo)外部(bu)(bu)熱(re)(re)故障和內(nei)部(bu)(bu)熱(re)(re)故障．對(dui)于(yu)(yu)(yu)(yu)前者(zhe)而(er)(er)言，通常是指(zhi)在大電(dian)流作(zuo)用(yong)下，壓接不良的裸(luo)露(lu)接頭出現(xian)溫(wen)(wen)升現(xian)象，給(gei)設備的安(an)全(quan)造成(cheng)隱患；對(dui)于(yu)(yu)(yu)(yu)后者(zhe)而(er)(er)言，主要是指(zhi)密封在材(cai)料(liao)內(nei)部(bu)(bu)的電(dian)纜等發(fa)生長時間(jian)發(fa)熱(re)(re)現(xian)象，造成(cheng)局(ju)部(bu)(bu)溫(wen)(wen)度(du)上(shang)升．對(dui)設備內(nei)部(bu)(bu)故障進行(xing)檢(jian)測可以通過其(qi)周圍(wei)材(cai)料(liao)的溫(wen)(wen)升檢(jian)測來實現(xian)．光纖光柵(zha)傳感器比傳統(tong)傳感器的抗(kang)電(dian)磁(ci)干(gan)擾能(neng)力(li)更(geng)(geng)強(qiang)，具(ju)有(you)更(geng)(geng)低的損耗和更(geng)(geng)高(gao)的靈敏(min)度(du)，屬于(yu)(yu)(yu)(yu)無源(yuan)獨立器件，其(qi)應(ying)用(yong)也(ye)逐漸從實驗室走向實際生活(huo)，將其(qi)應(ying)用(yong)于(yu)(yu)(yu)(yu)電(dian)力(li)系統(tong)中(zhong)具(ju)有(you)其(qi)他傳感器無法比擬的優越性。

通過光(guang)纖(xian)(xian)將光(guang)纖(xian)(xian)式溫度傳(chuan)感器連接到讀數儀表(biao)(biao)上，并與監控計算機通過總線連接．光(guang)纖(xian)(xian)式傳(chuan)感器的(de)(de)體積小，感溫頭易(yi)于(yu)與被測物體的(de)(de)表(biao)(biao)面接觸．該類傳(chuan)感器的(de)(de)主要優點為：受潮濕環境的(de)(de)影響(xiang)較小，具有較高(gao)的(de)(de)抗電(dian)磁干(gan)擾能(neng)力和良好的(de)(de)絕(jue)緣性，不易(yi)腐蝕等。

光纖光柵測溫系統在電纜隧道溫度監測中的應用

在(zai)發電(dian)(dian)(dian)(dian)廠和(he)(he)變電(dian)(dian)(dian)(dian)站中(zhong)，光(guang)(guang)纖(xian)(xian)光(guang)(guang)柵測(ce)(ce)(ce)溫(wen)(wen)(wen)(wen)系(xi)(xi)(xi)(xi)(xi)統(tong)(tong)可(ke)用(yong)于(yu)對電(dian)(dian)(dian)(dian)纜(lan)夾層和(he)(he)溝(gou)道(dao)以(yi)及(ji)電(dian)(dian)(dian)(dian)纜(lan)隧道(dao)的(de)(de)(de)(de)(de)溫(wen)(wen)(wen)(wen)度(du)(du)進行(xing)監(jian)測(ce)(ce)(ce)，起到監(jian)護(hu)電(dian)(dian)(dian)(dian)力電(dian)(dian)(dian)(dian)纜(lan)的(de)(de)(de)(de)(de)作用(yong)．此(ci)時，需要(yao)(yao)將測(ce)(ce)(ce)溫(wen)(wen)(wen)(wen)用(yong)光(guang)(guang)纖(xian)(xian)傳(chuan)(chuan)感器(qi)貼在(zai)電(dian)(dian)(dian)(dian)纜(lan)的(de)(de)(de)(de)(de)表(biao)(biao)面(mian)，通過光(guang)(guang)纖(xian)(xian)光(guang)(guang)柵測(ce)(ce)(ce)溫(wen)(wen)(wen)(wen)系(xi)(xi)(xi)(xi)(xi)統(tong)(tong)實(shi)時獲取(qu)電(dian)(dian)(dian)(dian)纜(lan)表(biao)(biao)面(mian)溫(wen)(wen)(wen)(wen)度(du)(du)的(de)(de)(de)(de)(de)相(xiang)關數據(ju)，連同電(dian)(dian)(dian)(dian)纜(lan)中(zhong)流過的(de)(de)(de)(de)(de)電(dian)(dian)(dian)(dian)流共同繪制出相(xiang)關曲線，以(yi)此(ci)來推算出電(dian)(dian)(dian)(dian)纜(lan)中(zhong)芯線的(de)(de)(de)(de)(de)溫(wen)(wen)(wen)(wen)度(du)(du)系(xi)(xi)(xi)(xi)(xi)數，根據(ju)電(dian)(dian)(dian)(dian)纜(lan)表(biao)(biao)面(mian)溫(wen)(wen)(wen)(wen)度(du)(du)和(he)(he)芯線溫(wen)(wen)(wen)(wen)度(du)(du)的(de)(de)(de)(de)(de)差值得到電(dian)(dian)(dian)(dian)流與(yu)電(dian)(dian)(dian)(dian)纜(lan)表(biao)(biao)面(mian)溫(wen)(wen)(wen)(wen)度(du)(du)之(zhi)間(jian)的(de)(de)(de)(de)(de)關系(xi)(xi)(xi)(xi)(xi)．這一(yi)關系(xi)(xi)(xi)(xi)(xi)可(ke)以(yi)為(wei)電(dian)(dian)(dian)(dian)力系(xi)(xi)(xi)(xi)(xi)統(tong)(tong)的(de)(de)(de)(de)(de)安全運行(xing)提(ti)供(gong)參考依據(ju)．另外，在(zai)隧道(dao)中(zhong)的(de)(de)(de)(de)(de)電(dian)(dian)(dian)(dian)纜(lan)受溫(wen)(wen)(wen)(wen)度(du)(du)影響較大，需要(yao)(yao)對隧道(dao)的(de)(de)(de)(de)(de)溫(wen)(wen)(wen)(wen)度(du)(du)有(you)清晰的(de)(de)(de)(de)(de)了解和(he)(he)實(shi)時的(de)(de)(de)(de)(de)監(jian)測(ce)(ce)(ce)，保(bao)證(zheng)(zheng)電(dian)(dian)(dian)(dian)纜(lan)的(de)(de)(de)(de)(de)正常工作．將光(guang)(guang)纖(xian)(xian)光(guang)(guang)柵溫(wen)(wen)(wen)(wen)度(du)(du)傳(chuan)(chuan)感系(xi)(xi)(xi)(xi)(xi)統(tong)(tong)應用(yong)其(qi)中(zhong)，可(ke)以(yi)實(shi)現連續的(de)(de)(de)(de)(de)分布式(shi)溫(wen)(wen)(wen)(wen)度(du)(du)監(jian)測(ce)(ce)(ce)；還(huan)可(ke)以(yi)配合使用(yong)通風裝置和(he)(he)空(kong)調系(xi)(xi)(xi)(xi)(xi)統(tong)(tong)，保(bao)證(zheng)(zheng)在(zai)不同季節電(dian)(dian)(dian)(dian)纜(lan)的(de)(de)(de)(de)(de)運行(xing)溫(wen)(wen)(wen)(wen)度(du)(du)都在(zai)允許范圍之(zhi)內．另外，光(guang)(guang)纖(xian)(xian)光(guang)(guang)柵測(ce)(ce)(ce)溫(wen)(wen)(wen)(wen)系(xi)(xi)(xi)(xi)(xi)統(tong)(tong)還(huan)可(ke)以(yi)做出有(you)效的(de)(de)(de)(de)(de)過熱(re)預報，實(shi)現傳(chuan)(chuan)統(tong)(tong)熱(re)源(yuan)傳(chuan)(chuan)感器(qi)無法實(shi)現的(de)(de)(de)(de)(de)火災早期報警；結合使用(yong)火災報警系(xi)(xi)(xi)(xi)(xi)統(tong)(tong)，還(huan)可(ke)以(yi)在(zai)設定的(de)(de)(de)(de)(de)報警條件滿足時啟動消防系(xi)(xi)(xi)(xi)(xi)統(tong)(tong)。