一、使用直流屏有什么好處

高壓配電(dian)室用(yong)直流(liu)屏作(zuo)控(kong)(kong)制、保護、監(jian)控(kong)(kong)和操作(zuo)斷路器的(de)電(dian)氣(qi)電(dian)源，交(jiao)流(liu)也可以(yi)，主要是(shi)根據斷路器控(kong)(kong)制操作(zuo)電(dian)源類(lei)型再決(jue)定。

用直流屏的好(hao)處是直流(liu)屏(ping)可以(yi)不用考(kao)慮三相平衡的問(wen)題；直流(liu)屏(ping)安全又(you)可靠。直流(liu)屏(ping)可以(yi)在交流(liu)電(dian)(dian)源正常的情(qing)況(kuang)下給蓄(xu)電(dian)(dian)池組事(shi)先充滿電(dian)(dian)，當交流(liu)電(dian)(dian)源停電(dian)(dian)時，由蓄(xu)電(dian)(dian)池饋(kui)電(dian)(dian)，仍能保(bao)證斷路器的操作、控制、保(bao)護和監控用電(dian)(dian)。

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二、直流屏的作用

直流(liu)屏(ping)的作用是用來供應這種直流(liu)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(gong)穩定直(zhi)流電(dian)(dian)源的設(she)備(bei)。在(zai)輸入(ru)380V電(dian)(dian)源時(shi)直(zhi)接轉(zhuan)化為220V，市(shi)電(dian)(dian)和(he)備(bei)用電(dian)(dian)均(jun)無(wu)輸入(ru)時(shi)，直(zhi)接轉(zhuan)化為蓄電(dian)(dian)池(chi)供(gong)電(dian)(dian)——直(zhi)流220V：實際上也可(ke)以說是一(yi)種工業專用應急電(dian)(dian)源。

發電(dian)(dian)廠和變電(dian)(dian)站中的(de)電(dian)(dian)力(li)操(cao)作電(dian)(dian)源現今采用的(de)都(dou)是直(zhi)流(liu)電(dian)(dian)源，它為(wei)控(kong)(kong)制負(fu)荷和動力(li)負(fu)荷以及(ji)直(zhi)流(liu)事(shi)故照明負(fu)荷等提供電(dian)(dian)源，是當代電(dian)(dian)力(li)系統控(kong)(kong)制、保護(hu)的(de)基礎(chu)。直(zhi)流(liu)屏由交配電(dian)(dian)單(dan)(dan)元、充電(dian)(dian)模塊單(dan)(dan)元、降壓硅鏈(lian)單(dan)(dan)元、直(zhi)流(liu)饋電(dian)(dian)單(dan)(dan)元、配電(dian)(dian)監控(kong)(kong)單(dan)(dan)元、監控(kong)(kong)模塊單(dan)(dan)元及(ji)絕緣(yuan)監測單(dan)(dan)元組成。

直(zhi)流屏主要應用于電(dian)(dian)力系(xi)統中小型發電(dian)(dian)廠、水電(dian)(dian)站、各類(lei)變電(dian)(dian)站，和其他使用直(zhi)流設備(bei)的用戶（如石化、礦山、鐵路等），適用于開關分合(he)閘及二次回路中的儀器(qi)、儀表、繼電(dian)(dian)保護和故障照明等場合(he)。