一、微機消諧裝置有什么作用
微機消諧(xie)裝置用于高壓(ya)柜(ju),是用來保護(hu)高壓(ya)的PT設(she)備(bei),可有效防止(zhi)諧(xie)振擊穿電(dian)壓(ya)互感(gan)器。有6kV,10kV,35kV等等。
微機(ji)(ji)消諧(xie)裝置可(ke)以防止電(dian)(dian)壓(ya)互感器發生(sheng)鐵磁(ci)諧(xie)振,擊穿電(dian)(dian)壓(ya)互感器的惡性(xing)事故,影響正(zheng)常的生(sheng)產和事故。微機(ji)(ji)消諧(xie)利用高性(xing)能(neng)單片(pian)機(ji)(ji)檢(jian)測和控制,使用固態繼電(dian)(dian)器,電(dian)(dian)流大,動作可(ke)靠。
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二、微機消諧裝置工作原理是什么
微機(ji)消(xiao)(xiao)(xiao)諧(xie)(xie)裝(zhuang)(zhuang)置采用高性能的單片微機(ji)作為核(he)心(xin)元(yuan)件,對(dui)PT開(kai)口(kou)三角(jiao)電(dian)(dian)(dian)(dian)壓(ya)(即(ji)零序電(dian)(dian)(dian)(dian)壓(ya))進(jin)(jin)行遁(dun)環檢測。正常工作情況下,該電(dian)(dian)(dian)(dian)壓(ya)小于30V,裝(zhuang)(zhuang)置內的大(da)功率(lv)消(xiao)(xiao)(xiao)諧(xie)(xie)元(yuan)件(固態繼電(dian)(dian)(dian)(dian)器)處(chu)于阻(zu)斷狀(zhuang)態,對(dui)系(xi)(xi)統運行不產生影響。當PT開(kai)口(kou)電(dian)(dian)(dian)(dian)壓(ya)大(da)于30V時(shi),系(xi)(xi)統出現故(gu)障。消(xiao)(xiao)(xiao)諧(xie)(xie)裝(zhuang)(zhuang)置開(kai)始(shi)對(dui)此信(xin)號進(jin)(jin)行數(shu)據采集,通過(guo)電(dian)(dian)(dian)(dian)路(lu)對(dui)信(xin)號進(jin)(jin)行數(shu)字(zi)測量、濾波、放(fang)大(da)等數(shu)字(zi)信(xin)號處(chu)理技術(shu),然后(hou)對(dui)檢測到的數(shu)據進(jin)(jin)行分析、計(ji)算,得(de)出故(gu)障類(lei)型。如(ru)果(guo)當前是(shi)鐵磁(ci)諧(xie)(xie)振,系(xi)(xi)統立即(ji)啟動消(xiao)(xiao)(xiao)諧(xie)(xie)電(dian)(dian)(dian)(dian)路(lu),使固態繼電(dian)(dian)(dian)(dian)器導通,讓鐵磁(ci)諧(xie)(xie)振在阻(zu)尼作用下迅速消(xiao)(xiao)(xiao)失。此時(shi),CPU系(xi)(xi)統進(jin)(jin)行記錄、存貯(zhu),并(bing)自動報警、顯(xian)示(shi)(shi)諧(xie)(xie)振信(xin)息(時(shi)間、頻率(lv)、電(dian)(dian)(dian)(dian)壓(ya)值)。如(ru)果(guo)電(dian)(dian)(dian)(dian)路(lu)是(shi)過(guo)電(dian)(dian)(dian)(dian)壓(ya)或單相(xiang)接地故(gu)障,微機(ji)系(xi)(xi)統檢測后(hou),分別(bie)給出顯(xian)示(shi)(shi)和報警,并(bing)記錄、存貯(zhu)有關故(gu)障信(xin)息。CPU系(xi)(xi)統處(chu)理完最后(hou),返(fan)回(hui)起始(shi)狀(zhuang)態,并(bing)繼續檢測電(dian)(dian)(dian)(dian)路(lu)中(zhong)的狀(zhuang)態。
三、微機消諧裝置的常見故障介紹
微機消(xiao)諧(xie)裝置(zhi)在(zai)實際運(yun)行中,會出現(xian)諧(xie)振報警,首先應(ying)分析具(ju)體情況(kuang),輔助其他(ta)措施,才能得出結(jie)論(lun),從根源上解決問題。微機消(xiao)諧(xie)裝置(zhi)廠(chang)家介紹在(zai)正常工作條(tiao)件(jian)時(shi),電壓小于(yu)30V裝置(zhi)中大(da)功率固態繼電器的(de)閉鎖狀(zhuang)態,不會影響(xiang)系統的(de)正常運(yun)行。當電壓大(da)于(yu)30V時(shi),系統將(jiang)出現(xian)故障,微機將(jiang)采集(ji)數據(ju)。
通過電(dian)路對信(xin)(xin)(xin)號(hao)進(jin)行(xing)(xing)測量和分析,并對數(shu)(shu)字信(xin)(xin)(xin)號(hao)處(chu)理(li)技(ji)術進(jin)行(xing)(xing)濾波和放大。然后(hou)對檢(jian)測到的數(shu)(shu)據(ju)進(jin)行(xing)(xing)分析計算,得(de)出(chu)故障類型。如果得(de)出(chu)的故障是鐵磁諧振,此時微機消(xiao)(xiao)諧裝置啟動(dong),固態(tai)繼電(dian)器在(zai)阻尼作用(yong)下使鐵磁諧振迅速消(xiao)(xiao)除。同時系統將(jiang)自動(dong)記錄、存儲和報警數(shu)(shu)據(ju),并顯示共(gong)振信(xin)(xin)(xin)息。
四、微機消諧裝置的技術參數有哪些
1、電源(yuan):AC220V或DC220V(其(qi)它情況可特殊定做)。
2、電源回路:DC220V≤30W或者AC220V≤30VA。
3、交流電壓回路:≤1VA。
4、交流(liu)額定電壓:100V。
5、告(gao)警接點(dian)容量(繼(ji)電器出口(kou),常開觸點(dian)):1A,DC220V。
6、RS232/RS485通訊接(jie)口,波(bo)特率1200~9600bps。