一、使用直流屏有什么好處

高壓配電(dian)室用直流屏(ping)作控(kong)制、保護、監(jian)控(kong)和操作斷路器的(de)電(dian)氣電(dian)源，交流也(ye)可以，主要是根據斷路器控(kong)制操作電(dian)源類型再決定(ding)。

用直流屏的好處是直(zhi)流屏(ping)可以不用(yong)考慮(lv)三相(xiang)平衡(heng)的問題；直(zhi)流屏(ping)安全又可靠。直(zhi)流屏(ping)可以在(zai)交流電(dian)源(yuan)正常的情況下給蓄電(dian)池(chi)組事(shi)先充滿電(dian)，當交流電(dian)源(yuan)停電(dian)時，由蓄電(dian)池(chi)饋電(dian)，仍能保證斷路器的操作、控(kong)制、保護(hu)和監控(kong)用(yong)電(dian)。

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二、直流屏的作用

直流屏的作用是用來供(gong)應(ying)這種直流電源。

直流屏是直流電源操作系統的簡稱。通用名為智能免維護直流電源屏，簡稱直流屏，通用型號為GZDW。簡單地說，直流屏就是提供穩(wen)定直流(liu)(liu)電(dian)(dian)源(yuan)的設備。在輸入380V電(dian)(dian)源(yuan)時直接轉(zhuan)化(hua)為(wei)220V，市電(dian)(dian)和備用(yong)電(dian)(dian)均無輸入時，直接轉(zhuan)化(hua)為(wei)蓄電(dian)(dian)池供電(dian)(dian)——直流(liu)(liu)220V：實際上(shang)也可(ke)以(yi)說是一種工業專用(yong)應急電(dian)(dian)源(yuan)。

發電(dian)(dian)(dian)(dian)廠和變(bian)電(dian)(dian)(dian)(dian)站中(zhong)的電(dian)(dian)(dian)(dian)力操作電(dian)(dian)(dian)(dian)源(yuan)現今采用(yong)的都是直(zhi)流電(dian)(dian)(dian)(dian)源(yuan)，它為(wei)控制負荷和動力負荷以(yi)及直(zhi)流事(shi)故照明(ming)負荷等提供電(dian)(dian)(dian)(dian)源(yuan)，是當代電(dian)(dian)(dian)(dian)力系統控制、保護(hu)的基礎。直(zhi)流屏由交配(pei)電(dian)(dian)(dian)(dian)單元(yuan)(yuan)(yuan)、充電(dian)(dian)(dian)(dian)模塊單元(yuan)(yuan)(yuan)、降壓硅鏈單元(yuan)(yuan)(yuan)、直(zhi)流饋(kui)電(dian)(dian)(dian)(dian)單元(yuan)(yuan)(yuan)、配(pei)電(dian)(dian)(dian)(dian)監(jian)控單元(yuan)(yuan)(yuan)、監(jian)控模塊單元(yuan)(yuan)(yuan)及絕緣監(jian)測(ce)單元(yuan)(yuan)(yuan)組(zu)成(cheng)。

直(zhi)流(liu)屏主要(yao)應用(yong)于電(dian)(dian)力系統(tong)中小型發電(dian)(dian)廠、水電(dian)(dian)站、各類變電(dian)(dian)站，和(he)其他使(shi)用(yong)直(zhi)流(liu)設備的(de)用(yong)戶（如石化、礦(kuang)山、鐵路(lu)等），適(shi)用(yong)于開(kai)關分合閘及二次回(hui)路(lu)中的(de)儀器、儀表、繼電(dian)(dian)保護(hu)和(he)故障(zhang)照(zhao)明等場合。