一、微機消諧裝置有什么作用
微機(ji)消諧裝置用(yong)(yong)于高壓(ya)柜(ju),是用(yong)(yong)來保護高壓(ya)的PT設備,可有(you)效(xiao)防止諧振擊(ji)穿電壓(ya)互(hu)感器。有(you)6kV,10kV,35kV等(deng)等(deng)。
微機(ji)(ji)消諧(xie)裝置可以防止電壓互(hu)感(gan)器(qi)發生鐵(tie)磁諧(xie)振,擊(ji)穿(chuan)電壓互(hu)感(gan)器(qi)的惡性(xing)事(shi)故,影(ying)響正常的生產(chan)和(he)事(shi)故。微機(ji)(ji)消諧(xie)利用(yong)高性(xing)能單片(pian)機(ji)(ji)檢(jian)測和(he)控制,使用(yong)固(gu)態繼電器(qi),電流大,動作可靠。
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二、微機消諧裝置工作原理是什么
微機(ji)(ji)(ji)消諧(xie)裝(zhuang)置采用高性能(neng)的(de)(de)單片微機(ji)(ji)(ji)作為核心元(yuan)件(jian),對(dui)(dui)PT開(kai)口(kou)三(san)角電(dian)(dian)(dian)(dian)(dian)壓(ya)(即零序(xu)電(dian)(dian)(dian)(dian)(dian)壓(ya))進(jin)(jin)行(xing)(xing)(xing)遁環(huan)檢測(ce)。正常工作情況下,該電(dian)(dian)(dian)(dian)(dian)壓(ya)小于(yu)(yu)30V,裝(zhuang)置內的(de)(de)大(da)功率消諧(xie)元(yuan)件(jian)(固態繼電(dian)(dian)(dian)(dian)(dian)器(qi))處于(yu)(yu)阻斷狀態,對(dui)(dui)系(xi)(xi)統(tong)(tong)運行(xing)(xing)(xing)不產生影響。當PT開(kai)口(kou)電(dian)(dian)(dian)(dian)(dian)壓(ya)大(da)于(yu)(yu)30V時(shi),系(xi)(xi)統(tong)(tong)出(chu)現故(gu)障(zhang)(zhang)。消諧(xie)裝(zhuang)置開(kai)始(shi)對(dui)(dui)此信(xin)(xin)號進(jin)(jin)行(xing)(xing)(xing)數(shu)據(ju)(ju)采集(ji),通(tong)過(guo)電(dian)(dian)(dian)(dian)(dian)路(lu)對(dui)(dui)信(xin)(xin)號進(jin)(jin)行(xing)(xing)(xing)數(shu)字測(ce)量、濾波、放大(da)等數(shu)字信(xin)(xin)號處理(li)技術,然后對(dui)(dui)檢測(ce)到的(de)(de)數(shu)據(ju)(ju)進(jin)(jin)行(xing)(xing)(xing)分析、計算,得(de)出(chu)故(gu)障(zhang)(zhang)類型。如(ru)果當前是鐵磁諧(xie)振,系(xi)(xi)統(tong)(tong)立即啟動消諧(xie)電(dian)(dian)(dian)(dian)(dian)路(lu),使固態繼電(dian)(dian)(dian)(dian)(dian)器(qi)導通(tong),讓鐵磁諧(xie)振在阻尼作用下迅速消失。此時(shi),CPU系(xi)(xi)統(tong)(tong)進(jin)(jin)行(xing)(xing)(xing)記(ji)錄(lu)(lu)、存(cun)(cun)貯,并(bing)自動報(bao)警、顯(xian)(xian)示諧(xie)振信(xin)(xin)息(時(shi)間、頻率、電(dian)(dian)(dian)(dian)(dian)壓(ya)值)。如(ru)果電(dian)(dian)(dian)(dian)(dian)路(lu)是過(guo)電(dian)(dian)(dian)(dian)(dian)壓(ya)或(huo)單相(xiang)接(jie)地故(gu)障(zhang)(zhang),微機(ji)(ji)(ji)系(xi)(xi)統(tong)(tong)檢測(ce)后,分別(bie)給出(chu)顯(xian)(xian)示和報(bao)警,并(bing)記(ji)錄(lu)(lu)、存(cun)(cun)貯有關故(gu)障(zhang)(zhang)信(xin)(xin)息。CPU系(xi)(xi)統(tong)(tong)處理(li)完最后,返(fan)回起始(shi)狀態,并(bing)繼續檢測(ce)電(dian)(dian)(dian)(dian)(dian)路(lu)中的(de)(de)狀態。
三、微機消諧裝置的常見故障介紹
微(wei)(wei)機(ji)消諧裝(zhuang)(zhuang)置在實際運行中,會出(chu)(chu)(chu)現諧振報警,首(shou)先應分析具體情況,輔助其他措施,才(cai)能(neng)得(de)出(chu)(chu)(chu)結(jie)論,從根源上解決(jue)問題(ti)。微(wei)(wei)機(ji)消諧裝(zhuang)(zhuang)置廠(chang)家(jia)介紹在正常(chang)(chang)工作條件時,電壓(ya)(ya)小(xiao)于(yu)30V裝(zhuang)(zhuang)置中大(da)功(gong)率固態(tai)繼電器的閉鎖狀態(tai),不會影響系統(tong)的正常(chang)(chang)運行。當電壓(ya)(ya)大(da)于(yu)30V時,系統(tong)將出(chu)(chu)(chu)現故(gu)障(zhang),微(wei)(wei)機(ji)將采集數據。
通(tong)過電路對信號(hao)進行(xing)測量和分析(xi),并對數(shu)字信號(hao)處理技術(shu)進行(xing)濾波和放大(da)。然后對檢測到(dao)的(de)數(shu)據進行(xing)分析(xi)計算,得(de)出故障類型。如果得(de)出的(de)故障是鐵磁諧振(zhen)(zhen),此時微機(ji)消諧裝置(zhi)啟動(dong),固態繼電器在阻尼作用下使(shi)鐵磁諧振(zhen)(zhen)迅速消除。同時系統將自動(dong)記(ji)錄(lu)、存(cun)儲(chu)和報警數(shu)據,并顯示共振(zhen)(zhen)信息。
四、微機消諧裝置的技術參數有哪些
1、電源:AC220V或DC220V(其(qi)它情況(kuang)可特殊定做)。
2、電源回(hui)路(lu):DC220V≤30W或者AC220V≤30VA。
3、交流電壓回(hui)路:≤1VA。
4、交流額定(ding)電(dian)壓:100V。
5、告警接(jie)點(dian)(dian)容(rong)量(繼電器出口,常開觸點(dian)(dian)):1A,DC220V。
6、RS232/RS485通(tong)訊接(jie)口(kou),波特率(lv)1200~9600bps。