一、微機消諧裝置有什么作用
微機消諧裝置用(yong)于高壓(ya)(ya)柜,是用(yong)來保(bao)護高壓(ya)(ya)的(de)PT設備(bei),可有效防止(zhi)諧振擊(ji)穿電壓(ya)(ya)互感器。有6kV,10kV,35kV等(deng)等(deng)。
微機(ji)(ji)消諧裝置可(ke)以防(fang)止電(dian)壓(ya)互(hu)感器發生鐵磁諧振,擊穿電(dian)壓(ya)互(hu)感器的惡性事故(gu),影(ying)響正常(chang)的生產和事故(gu)。微機(ji)(ji)消諧利用(yong)高性能(neng)單片機(ji)(ji)檢測和控制(zhi),使用(yong)固態繼(ji)電(dian)器,電(dian)流大,動作(zuo)可(ke)靠。
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二、微機消諧裝置工作原理是什么
微(wei)機(ji)消諧(xie)裝(zhuang)置采用(yong)(yong)高性能的(de)單片(pian)微(wei)機(ji)作為核心元件(jian),對(dui)PT開口(kou)三角電(dian)(dian)(dian)(dian)(dian)壓(ya)(即零(ling)序電(dian)(dian)(dian)(dian)(dian)壓(ya))進(jin)(jin)行遁環檢(jian)測。正常工作情況下,該電(dian)(dian)(dian)(dian)(dian)壓(ya)小于30V,裝(zhuang)置內的(de)大(da)功(gong)率(lv)消諧(xie)元件(jian)(固態(tai)繼(ji)(ji)電(dian)(dian)(dian)(dian)(dian)器)處于阻(zu)(zu)斷狀(zhuang)態(tai),對(dui)系統(tong)運(yun)行不產生影(ying)響(xiang)。當PT開口(kou)電(dian)(dian)(dian)(dian)(dian)壓(ya)大(da)于30V時(shi),系統(tong)出(chu)現故(gu)(gu)障(zhang)(zhang)。消諧(xie)裝(zhuang)置開始對(dui)此信號(hao)進(jin)(jin)行數(shu)據采集,通(tong)(tong)過(guo)電(dian)(dian)(dian)(dian)(dian)路(lu)對(dui)信號(hao)進(jin)(jin)行數(shu)字測量(liang)、濾波、放大(da)等(deng)數(shu)字信號(hao)處理技術(shu),然后對(dui)檢(jian)測到的(de)數(shu)據進(jin)(jin)行分析(xi)、計算,得出(chu)故(gu)(gu)障(zhang)(zhang)類型。如果當前是(shi)鐵(tie)磁諧(xie)振,系統(tong)立即啟動消諧(xie)電(dian)(dian)(dian)(dian)(dian)路(lu),使固態(tai)繼(ji)(ji)電(dian)(dian)(dian)(dian)(dian)器導(dao)通(tong)(tong),讓鐵(tie)磁諧(xie)振在阻(zu)(zu)尼(ni)作用(yong)(yong)下迅速消失。此時(shi),CPU系統(tong)進(jin)(jin)行記錄(lu)、存(cun)貯,并自動報警、顯(xian)示(shi)(shi)諧(xie)振信息(時(shi)間、頻(pin)率(lv)、電(dian)(dian)(dian)(dian)(dian)壓(ya)值)。如果電(dian)(dian)(dian)(dian)(dian)路(lu)是(shi)過(guo)電(dian)(dian)(dian)(dian)(dian)壓(ya)或單相(xiang)接(jie)地故(gu)(gu)障(zhang)(zhang),微(wei)機(ji)系統(tong)檢(jian)測后,分別給(gei)出(chu)顯(xian)示(shi)(shi)和報警,并記錄(lu)、存(cun)貯有關(guan)故(gu)(gu)障(zhang)(zhang)信息。CPU系統(tong)處理完最后,返回起始狀(zhuang)態(tai),并繼(ji)(ji)續檢(jian)測電(dian)(dian)(dian)(dian)(dian)路(lu)中的(de)狀(zhuang)態(tai)。
三、微機消諧裝置的常見故障介紹
微機消諧(xie)(xie)裝置(zhi)在(zai)(zai)實際運行(xing)中,會出(chu)現諧(xie)(xie)振報(bao)警(jing),首先應(ying)分析具(ju)體情況,輔助其他措(cuo)施,才能得出(chu)結(jie)論,從(cong)根(gen)源(yuan)上(shang)解決問題。微機消諧(xie)(xie)裝置(zhi)廠家介紹在(zai)(zai)正常(chang)工(gong)作條(tiao)件時,電壓小(xiao)于(yu)(yu)30V裝置(zhi)中大(da)功率固(gu)態繼電器的閉鎖(suo)狀態,不會影響系統(tong)的正常(chang)運行(xing)。當電壓大(da)于(yu)(yu)30V時,系統(tong)將出(chu)現故障,微機將采集數(shu)據(ju)。
通過電路對信號進(jin)行(xing)測(ce)量(liang)和分(fen)析,并對數(shu)字信號處理技術進(jin)行(xing)濾波和放大。然后對檢(jian)測(ce)到的數(shu)據(ju)進(jin)行(xing)分(fen)析計算,得出(chu)故(gu)(gu)障(zhang)類型。如果得出(chu)的故(gu)(gu)障(zhang)是鐵磁諧振,此時微機(ji)消(xiao)諧裝置啟動,固態繼(ji)電器在阻尼作用下使(shi)鐵磁諧振迅速消(xiao)除。同時系統將自動記錄、存(cun)儲和報警數(shu)據(ju),并顯(xian)示共振信息。
四、微機消諧裝置的技術參數有哪些
1、電源:AC220V或DC220V(其它情況可特殊(shu)定做)。
2、電源回(hui)路:DC220V≤30W或者AC220V≤30VA。
3、交流電(dian)壓回(hui)路:≤1VA。
4、交流額定(ding)電壓(ya):100V。
5、告警接點(dian)容量(繼電器出口(kou),常開觸(chu)點(dian)):1A,DC220V。
6、RS232/RS485通(tong)訊接(jie)口,波特率1200~9600bps。