一、使用直流屏有什么好處
高壓配電室用直(zhi)流屏作控制、保護、監控和操(cao)作斷路(lu)器(qi)的電氣電源(yuan),交流也可以(yi),主要是根據斷路(lu)器(qi)控制操(cao)作電源(yuan)類型(xing)再決定。
用直流屏的好(hao)處是直(zhi)流(liu)(liu)屏(ping)可(ke)以(yi)不用(yong)(yong)考(kao)慮三相(xiang)平衡的問題;直(zhi)流(liu)(liu)屏(ping)安全又可(ke)靠。直(zhi)流(liu)(liu)屏(ping)可(ke)以(yi)在交流(liu)(liu)電(dian)源正常(chang)的情況下給蓄(xu)電(dian)池(chi)組事(shi)先(xian)充滿(man)電(dian),當交流(liu)(liu)電(dian)源停電(dian)時(shi),由蓄(xu)電(dian)池(chi)饋(kui)電(dian),仍能(neng)保(bao)證斷路器的操(cao)作、控制(zhi)、保(bao)護(hu)和監(jian)控用(yong)(yong)電(dian)。
二、直流屏的作用
直(zhi)流屏的作(zuo)用是用來供應這(zhe)種直(zhi)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(jiu)是(shi)提供(gong)穩定直(zhi)流電源(yuan)的設備。在輸入(ru)380V電源(yuan)時(shi)直(zhi)接轉化為(wei)220V,市電和備用(yong)電均無(wu)輸入(ru)時(shi),直(zhi)接轉化為(wei)蓄電池供(gong)電——直(zhi)流220V:實(shi)際上也(ye)可以說是(shi)一(yi)種工業專(zhuan)用(yong)應(ying)急電源(yuan)。
發電(dian)(dian)(dian)(dian)廠和(he)變電(dian)(dian)(dian)(dian)站(zhan)中的電(dian)(dian)(dian)(dian)力操作電(dian)(dian)(dian)(dian)源現今(jin)采用的都是(shi)(shi)直(zhi)流(liu)電(dian)(dian)(dian)(dian)源,它(ta)為控制負(fu)荷和(he)動力負(fu)荷以及直(zhi)流(liu)事(shi)故照明負(fu)荷等提(ti)供電(dian)(dian)(dian)(dian)源,是(shi)(shi)當代(dai)電(dian)(dian)(dian)(dian)力系統控制、保護的基礎。直(zhi)流(liu)屏由交配電(dian)(dian)(dian)(dian)單元(yuan)(yuan)(yuan)、充電(dian)(dian)(dian)(dian)模塊(kuai)單元(yuan)(yuan)(yuan)、降壓硅鏈單元(yuan)(yuan)(yuan)、直(zhi)流(liu)饋電(dian)(dian)(dian)(dian)單元(yuan)(yuan)(yuan)、配電(dian)(dian)(dian)(dian)監控單元(yuan)(yuan)(yuan)、監控模塊(kuai)單元(yuan)(yuan)(yuan)及絕緣監測單元(yuan)(yuan)(yuan)組成(cheng)。
直流(liu)(liu)屏主要應(ying)用(yong)于電(dian)力系(xi)統中(zhong)(zhong)小(xiao)型發電(dian)廠、水電(dian)站、各類變(bian)電(dian)站,和其他(ta)使用(yong)直流(liu)(liu)設備的用(yong)戶(如石化、礦山、鐵路等),適用(yong)于開關分合(he)閘及二(er)次回路中(zhong)(zhong)的儀器、儀表、繼電(dian)保護和故障照明等場合(he)。