變(bian)(bian)電(dian)(dian)站(zhan)(zhan)是電(dian)(dian)力系統(tong)中(zhong)變(bian)(bian)換電(dian)(dian)壓(ya)、接(jie)受和分配(pei)電(dian)(dian)能、控(kong)制電(dian)(dian)力的(de)流向和調整電(dian)(dian)壓(ya)的(de)電(dian)(dian)力設施。變(bian)(bian)電(dian)(dian)站(zhan)(zhan)作(zuo)為十分重要的(de)能源轉(zhuan)化基地(di)，若(ruo)發(fa)生(sheng)(sheng)火(huo)災等電(dian)(dian)力事故，必將導(dao)致(zhi)大(da)面積停電(dian)(dian)，給企業的(de)生(sheng)(sheng)產、人民(min)的(de)生(sheng)(sheng)活帶來(lai)重大(da)影響和損(sun)失。因此，保障變(bian)(bian)電(dian)(dian)站(zhan)(zhan)安全、可靠，避(bi)免火(huo)災至關重要。其(qi)中(zhong)，設備過熱是導(dao)致(zhi)變(bian)(bian)電(dian)(dian)站(zhan)(zhan)火(huo)災的(de)重要隱患(huan)。如(ru)變(bian)(bian)電(dian)(dian)站(zhan)(zhan)高(gao)壓(ya)開關柜的(de)動靜(jing)觸頭及其(qi)他連接(jie)處、電(dian)(dian)纜接(jie)頭、電(dian)(dian)纜連接(jie)處、高(gao)壓(ya)電(dian)(dian)纜的(de)局部放(fang)電(dian)(dian)等位置過熱是大(da)型事故的(de)主要隱患(huan)點。而且，這(zhe)些地(di)方往(wang)往(wang)存在著幾千甚至上(shang)萬(wan)伏的(de)電(dian)(dian)壓(ya)，操作(zuo)人員(yuan)進入排查(cha)，存在極大(da)的(de)安全隱患(huan)。

變電站無線測溫系統的特點和缺點

無(wu)(wu)線(xian)(xian)測溫(wen)(wen)傳感器、無(wu)(wu)線(xian)(xian)集(ji)中(zhong)接(jie)(jie)收(shou)器、變(bian)(bian)(bian)電站(zhan)監(jian)(jian)(jian)(jian)控(kong)(kong)、集(ji)控(kong)(kong)站(zhan)、遠(yuan)程(cheng)(cheng)監(jian)(jian)(jian)(jian)控(kong)(kong)中(zhong)心，無(wu)(wu)線(xian)(xian)測溫(wen)(wen)傳感器通(tong)過(guo)無(wu)(wu)線(xian)(xian)通(tong)訊(xun)方式與無(wu)(wu)線(xian)(xian)集(ji)中(zhong)接(jie)(jie)收(shou)器連(lian)接(jie)(jie)；無(wu)(wu)線(xian)(xian)集(ji)中(zhong)接(jie)(jie)收(shou)器通(tong)過(guo)有線(xian)(xian)通(tong)訊(xun)方式與變(bian)(bian)(bian)電站(zhan)監(jian)(jian)(jian)(jian)控(kong)(kong)連(lian)接(jie)(jie)；變(bian)(bian)(bian)電站(zhan)監(jian)(jian)(jian)(jian)控(kong)(kong)與集(ji)控(kong)(kong)站(zhan)連(lian)接(jie)(jie)；遠(yuan)程(cheng)(cheng)監(jian)(jian)(jian)(jian)控(kong)(kong)中(zhong)心與集(ji)控(kong)(kong)站(zhan)連(lian)接(jie)(jie)；變(bian)(bian)(bian)電站(zhan)監(jian)(jian)(jian)(jian)控(kong)(kong)配(pei)置(zhi)(zhi)(zhi)(zhi)有通(tong)過(guo)觸發能(neng)將溫(wen)(wen)度(du)異常告(gao)警(jing)信(xin)息發送給(gei)有關工(gong)作(zuo)人(ren)員手機的(de)(de)GSM網絡；遠(yuan)程(cheng)(cheng)監(jian)(jian)(jian)(jian)控(kong)(kong)中(zhong)心、集(ji)控(kong)(kong)站(zhan)、變(bian)(bian)(bian)電站(zhan)監(jian)(jian)(jian)(jian)控(kong)(kong)分(fen)別(bie)配(pei)置(zhi)(zhi)(zhi)(zhi)有溫(wen)(wen)度(du)監(jian)(jian)(jian)(jian)控(kong)(kong)顯示裝置(zhi)(zhi)(zhi)(zhi)，并分(fen)別(bie)對變(bian)(bian)(bian)電站(zhan)設(she)備的(de)(de)溫(wen)(wen)度(du)進(jin)行(xing)實時監(jian)(jian)(jian)(jian)控(kong)(kong)，其(qi)中(zhong)變(bian)(bian)(bian)電站(zhan)監(jian)(jian)(jian)(jian)控(kong)(kong)內置(zhi)(zhi)(zhi)(zhi)有預(yu)設(she)溫(wen)(wen)度(du)閾(yu)值(zhi)，并能(neng)將接(jie)(jie)受到的(de)(de)溫(wen)(wen)度(du)數據與預(yu)設(she)閾(yu)值(zhi)進(jin)行(xing)比較，將異常告(gao)警(jing)信(xin)息發送給(gei)有關工(gong)作(zuo)人(ren)員的(de)(de)手機被動地設(she)置(zhi)(zhi)(zhi)(zhi)一個溫(wen)(wen)度(du)閾(yu)值(zhi)，而不(bu)能(neng)根據具體的(de)(de)環(huan)境設(she)定(ding)多(duo)級報警(jing)，如(ru)變(bian)(bian)(bian)電站(zhan)多(duo)點的(de)(de)基礎(chu)溫(wen)(wen)度(du)存在(zai)較大差(cha)異，該系統容易出現誤判，甚至報警(jing)時已經形成了較大的(de)(de)火(huo)(huo)災。不(bu)能(neng)準確定(ding)位事故點位置(zhi)(zhi)(zhi)(zhi)，只能(neng)判斷火(huo)(huo)警(jing)區域，且無(wu)(wu)法反映溫(wen)(wen)度(du)實時狀況。

變電站分布式光纖測溫系統的優點

由于分(fen)布式光(guang)纖測溫傳(chuan)感器能(neng)夠實現對光(guang)纖沿線溫度(du)的分(fen)布式連續監測(ce)，且(qie)具有(you)體積(ji)小、重量(liang)輕、電(dian)(dian)絕緣性好、耐化學腐蝕、耐高(gao)溫、靈敏度(du)高(gao)、響應快、防爆、防燃、成本低、抗電(dian)(dian)磁干擾等(deng)優勢，已被(bei)廣泛應用(yong)于在管道漏檢(jian)、大壩滲透(tou)、電(dian)(dian)力(li)系統監測(ce)、火災預警以及醫療等(deng)方面。

華光天銳提供一種用于變電站溫度監測的光纖測溫系統，通過采用基于拉曼散射測溫技術的分布式光纖溫度測試，在一根光纖上即可準確及時地定位溫度異常點；同時系統設有多級定溫報警值和溫升速率報警，實時顯示溫度分布曲線，在火災發生前做到早期預警，解決了現有測溫系統僅能被動地設置一個溫度閾值容易出現誤判，且不能準確定位事故點位置的問題。目前國內外針對基于拉曼散射的分布式光(guang)纖(xian)測溫技(ji)術研(yan)究較多，其能夠實現光(guang)(guang)(guang)(guang)纖(xian)(xian)沿(yan)線(xian)(xian)(xian)溫(wen)度(du)(du)的(de)(de)分布式(shi)測量的(de)(de)技(ji)術基礎為光(guang)(guang)(guang)(guang)在(zai)光(guang)(guang)(guang)(guang)纖(xian)(xian)中傳播(bo)時(shi)產生的(de)(de)拉(la)曼(man)散(san)(san)射及(ji)光(guang)(guang)(guang)(guang)時(shi)域反(fan)射技(ji)術，當光(guang)(guang)(guang)(guang)在(zai)光(guang)(guang)(guang)(guang)纖(xian)(xian)中發(fa)生拉(la)曼(man)散(san)(san)射時(shi)，其散(san)(san)射光(guang)(guang)(guang)(guang)強(qiang)度(du)(du)與溫(wen)度(du)(du)相關，因此(ci)可(ke)通(tong)過(guo)強(qiang)度(du)(du)調制型(xing)技(ji)術實現對光(guang)(guang)(guang)(guang)纖(xian)(xian)沿(yan)線(xian)(xian)(xian)溫(wen)度(du)(du)的(de)(de)測量；而通(tong)過(guo)光(guang)(guang)(guang)(guang)時(shi)域反(fan)射技(ji)術則可(ke)實現對被(bei)測溫(wen)度(du)(du)點位置信息的(de)(de)解調，以此(ci)完成光(guang)(guang)(guang)(guang)纖(xian)(xian)沿(yan)線(xian)(xian)(xian)溫(wen)度(du)(du)的(de)(de)分布式(shi)測量。