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直流屏行業簡介

一、什么是直流屏

直(zhi)(zhi)流屏(ping)(ping)是(shi)直(zhi)(zhi)流電(dian)(dian)源(yuan)操作(zuo)系統的簡(jian)稱。通用(yong)名為智能免(mian)維護直(zhi)(zhi)流電(dian)(dian)源(yuan)屏(ping)(ping)，簡(jian)稱直(zhi)(zhi)流屏(ping)(ping)，通用(yong)型號為GZDW。簡(jian)單地說，直(zhi)(zhi)流屏(ping)(ping)就是(shi)提供穩(wen)定(ding)直(zhi)(zhi)流電(dian)(dian)源(yuan)的設備。在輸入380V電(dian)(dian)源(yuan)時直(zhi)(zhi)接(jie)轉化為220V，市電(dian)(dian)和備用(yong)電(dian)(dian)均無輸入時，直(zhi)(zhi)接(jie)轉化為蓄電(dian)(dian)池供電(dian)(dian)——直(zhi)(zhi)流220V：實際上也可以說是(shi)一種工業(ye)專(zhuan)用(yong)應急電(dian)(dian)源(yuan)。

二、使用直流屏有什么好處

用直流(liu)屏(ping)的好(hao)處是直流(liu)屏(ping)可(ke)以不用考慮(lv)三(san)相平衡的問題；直流(liu)屏(ping)安全又可(ke)靠。直流(liu)屏(ping)可(ke)以在交流(liu)電(dian)(dian)(dian)源(yuan)正常(chang)的情況(kuang)下給蓄電(dian)(dian)(dian)池(chi)組(zu)事先充滿(man)電(dian)(dian)(dian)，當交流(liu)電(dian)(dian)(dian)源(yuan)停電(dian)(dian)(dian)時，由(you)蓄電(dian)(dian)(dian)池(chi)饋電(dian)(dian)(dian)，仍能保證斷(duan)路器的操(cao)作、控制、保護和監控用電(dian)(dian)(dian)。

三、直流屏的作用

直流屏的作用是用來供應這種直流電源。發電(dian)(dian)廠和變電(dian)(dian)站中(zhong)的電(dian)(dian)力(li)操作(zuo)電(dian)(dian)源(yuan)現今(jin)采用的都是(shi)直流電(dian)(dian)源(yuan)，它為控制(zhi)負荷(he)和動力(li)負荷(he)以及(ji)直流事故(gu)照明負荷(he)等提(ti)供電(dian)(dian)源(yuan)，是(shi)當代電(dian)(dian)力(li)系統控制(zhi)、保護的基礎(chu)。

直流屏主要應用于電(dian)力系統中小型(xing)發電(dian)廠、水(shui)電(dian)站、各類變電(dian)站，和(he)其(qi)他使用直流設備的(de)用戶(hu)（如石化、礦山、鐵路等(deng)），適用于開(kai)關(guan)分合閘(zha)及(ji)二次回(hui)路中的(de)儀器(qi)、儀表、繼電(dian)保護和(he)故障(zhang)照明等(deng)場合。

四、直流屏的工作原理

直流(liu)屏電力操作電源系(xi)統由(you)交流(liu)配電部(bu)(bu)(bu)(bu)分(fen)、整流(liu)部(bu)(bu)(bu)(bu)分(fen)、直流(liu)饋電部(bu)(bu)(bu)(bu)分(fen)、監控(kong)(kong)(kong)部(bu)(bu)(bu)(bu)分(fen)組成。其(qi)中交流(liu)配電部(bu)(bu)(bu)(bu)分(fen)主要由(you)交流(liu)配電單元組成。整流(liu)部(bu)(bu)(bu)(bu)分(fen)由(you)充電模塊和(he)(he)隔離二(er)極(ji)管組成。直流(liu)饋電部(bu)(bu)(bu)(bu)分(fen)由(you)降壓硅鏈、絕緣檢(jian)測(ce)、合閘(zha)分(fen)路和(he)(he)控(kong)(kong)(kong)制分(fen)路組成，監控(kong)(kong)(kong)部(bu)(bu)(bu)(bu)分(fen)由(you)監控(kong)(kong)(kong)模塊和(he)(he)配電監控(kong)(kong)(kong)組成。

系統交流輸入正(zheng)(zheng)常(chang)時(shi)，兩(liang)路交流輸入經(jing)交流切換(huan)控制(zhi)電(dian)(dian)(dian)(dian)路選擇其中(zhong)一路輸入，并通過交流配電(dian)(dian)(dian)(dian)單(dan)元(yuan)給各個(ge)充(chong)電(dian)(dian)(dian)(dian)模(mo)塊供電(dian)(dian)(dian)(dian)。充(chong)電(dian)(dian)(dian)(dian)模(mo)塊將(jiang)三相交流電(dian)(dian)(dian)(dian)轉(zhuan)換(huan)為(wei)220V或110V的(de)直流，經(jing)隔離二極(ji)管隔離后(hou)并聯輸出(chu)，一方面給電(dian)(dian)(dian)(dian)池充(chong)電(dian)(dian)(dian)(dian)，另一方面通過合(he)閘(zha)分(fen)路和控制(zhi)分(fen)路給負(fu)載提供正(zheng)(zheng)常(chang)的(de)直流電(dian)(dian)(dian)(dian)源(yuan)。

交(jiao)流輸入停電(dian)或異常時，充電(dian)模(mo)塊停止工作，由電(dian)池通(tong)過合(he)閘分路和控制分路給(gei)負(fu)載供電(dian)。交(jiao)流輸入恢復正常以(yi)后，充電(dian)模(mo)塊對電(dian)池充電(dian)。