變(bian)(bian)(bian)(bian)(bian)壓(ya)器(qi)(qi)(qi)(qi)是變(bian)(bian)(bian)(bian)(bian)電(dian)(dian)站重要設備之一(yi)。變(bian)(bian)(bian)(bian)(bian)壓(ya)器(qi)(qi)(qi)(qi)運行時，其繞組和鐵芯的(de)電(dian)(dian)能損耗都將(jiang)轉變(bian)(bian)(bian)(bian)(bian)為(wei)(wei)熱能，溫(wen)度的(de)升(sheng)高將(jiang)直接加快絕(jue)緣老化速(su)度，為(wei)(wei)了(le)有(you)效地監測(ce)變(bian)(bian)(bian)(bian)(bian)壓(ya)器(qi)(qi)(qi)(qi)溫(wen)度，延長(chang)變(bian)(bian)(bian)(bian)(bian)壓(ya)器(qi)(qi)(qi)(qi)運行壽命，必(bi)須采(cai)用更(geng)先進更(geng)可靠(kao)的(de)監測(ce)手段。研(yan)究表(biao)明，傳統的(de)變(bian)(bian)(bian)(bian)(bian)壓(ya)器(qi)(qi)(qi)(qi)測(ce)溫(wen)方法，如壓(ya)力(li)式測(ce)溫(wen)和鉑電(dian)(dian)阻測(ce)溫(wen)均存在一(yi)定的(de)局限，且(qie)變(bian)(bian)(bian)(bian)(bian)壓(ya)器(qi)(qi)(qi)(qi)內部存在高電(dian)(dian)壓(ya)及(ji)強(qiang)電(dian)(dian)磁(ci)場，使(shi)得測(ce)量及(ji)傳輸數(shu)據(ju)易受電(dian)(dian)磁(ci)干擾，從而影響數(shu)據(ju)的(de)可靠(kao)性和準確(que)性。而光纖測(ce)溫(wen)技術具有(you)測(ce)量精確(que)，耐油，耐壓(ya)，抗電(dian)(dian)磁(ci)干擾，電(dian)(dian)絕(jue)緣，體積小，耐腐蝕等優點。目前，采(cai)用光纖傳感器(qi)(qi)(qi)(qi)的(de)變(bian)(bian)(bian)(bian)(bian)壓(ya)器(qi)(qi)(qi)(qi)繞組測(ce)溫(wen)系統在國內外大(da)型電(dian)(dian)力(li)變(bian)(bian)(bian)(bian)(bian)壓(ya)器(qi)(qi)(qi)(qi)上已經得到(dao)了(le)廣(guang)泛的(de)應用。

熒光光纖測溫原理

熒(ying)(ying)(ying)光(guang)(guang)光(guang)(guang)纖測溫(wen)探頭是(shi)基于(yu)稀(xi)土熒(ying)(ying)(ying)光(guang)(guang)物(wu)質(zhi)的(de)材料特(te)性實(shi)現的(de)。當稀(xi)土熒(ying)(ying)(ying)光(guang)(guang)物(wu)質(zhi)被特(te)定波(bo)長(chang)光(guang)(guang)線照(zhao)射后被激發，可(ke)產生可(ke)見光(guang)(guang)譜(pu)即熒(ying)(ying)(ying)光(guang)(guang)。停止照(zhao)射后熒(ying)(ying)(ying)光(guang)(guang)逐漸消(xiao)(xiao)失，逐漸消(xiao)(xiao)失的(de)熒(ying)(ying)(ying)光(guang)(guang)稱為余暉。熒(ying)(ying)(ying)光(guang)(guang)余暉的(de)衰變(bian)時(shi)(shi)間常(chang)(chang)數(shu)是(shi)溫(wen)度(du)的(de)單值(zhi)函數(shu)，通常(chang)(chang)溫(wen)度(du)越高(gao)，時(shi)(shi)間常(chang)(chang)數(shu)越小。只(zhi)要測得(de)時(shi)(shi)間常(chang)(chang)數(shu)的(de)值(zhi)，就可(ke)求(qiu)出溫(wen)度(du)值(zhi)。這種測溫(wen)原理的(de)最(zui)大優點就是(shi)，被測目標溫(wen)度(du)只(zhi)取決于(yu)熒(ying)(ying)(ying)光(guang)(guang)材料的(de)時(shi)(shi)間常(chang)(chang)數(shu)，與系(xi)統的(de)其它(ta)變(bian)量無關，例如光(guang)(guang)源強度(du)的(de)變(bian)化，傳輸(shu)速率(lv)等都不影響(xiang)測量結果。

熒光光纖測溫系統安裝方式和優點

熒光(guang)光(guang)纖(xian)測(ce)溫(wen)(wen)系統(tong)，是在需要被(bei)測(ce)量部(bu)(bu)位如(ru)繞組，靠近(jin)導線埋(mai)設光(guang)纖(xian)傳感器(qi)，進行實時測(ce)溫(wen)(wen)，并(bing)通(tong)過(guo)安(an)裝在變壓器(qi)油箱上的(de)(de)光(guang)纖(xian)貫通(tong)器(qi)，將(jiang)溫(wen)(wen)度信號引出至(zhi)外部(bu)(bu)主機，然后通(tong)過(guo)處理，在顯(xian)示(shi)屏顯(xian)示(shi)出溫(wen)(wen)度值和有關(guan)系統(tong)參數，也可通(tong)過(guo)RS485或(huo)網線將(jiang)溫(wen)(wen)度數據傳輸至(zhi)后臺客(ke)戶端(duan)，實現變壓器(qi)熱點(dian)溫(wen)(wen)度的(de)(de)實時監控(kong)。

熒光(guang)(guang)光(guang)(guang)纖測(ce)溫系(xi)統(tong)可較真實(shi)準確(que)的(de)(de)(de)(de)測(ce)量(liang)并顯示變(bian)壓(ya)器(qi)內(nei)部測(ce)量(liang)點的(de)(de)(de)(de)熱點溫度(du)，為變(bian)壓(ya)器(qi)產品的(de)(de)(de)(de)負荷預測(ce)、壽命評(ping)估(gu)和狀態評(ping)估(gu)提供參考數據。光(guang)(guang)纖測(ce)溫系(xi)統(tong)的(de)(de)(de)(de)優點是能夠實(shi)時、準確(que)的(de)(de)(de)(de)監測(ce)變(bian)壓(ya)器(qi)繞組(zu)、鐵芯、絕緣和油面等任意點的(de)(de)(de)(de)溫度(du)，實(shi)時反映被監測(ce)對象(xiang)的(de)(de)(de)(de)溫度(du)變(bian)化，通過合理控制，將大(da)幅延長變(bian)壓(ya)器(qi)的(de)(de)(de)(de)使用壽命，提高變(bian)壓(ya)器(qi)的(de)(de)(de)(de)輸送能力。