一、直流屏一(yi)般(ban)用在(zai)什么地方

直流屏是直(zhi)(zhi)流(liu)(liu)(liu)電(dian)(dian)(dian)(dian)源(yuan)操(cao)作系(xi)統的簡稱，通用名為(wei)(wei)智能免維護(hu)直(zhi)(zhi)流(liu)(liu)(liu)電(dian)(dian)(dian)(dian)源(yuan)屏，通用型號為(wei)(wei)GZDW。它的主要(yao)功能是把交流(liu)(liu)(liu)電(dian)(dian)(dian)(dian)轉化為(wei)(wei)直(zhi)(zhi)流(liu)(liu)(liu)電(dian)(dian)(dian)(dian)。電(dian)(dian)(dian)(dian)廠和(he)(he)變(bian)電(dian)(dian)(dian)(dian)站中的電(dian)(dian)(dian)(dian)力操(cao)作電(dian)(dian)(dian)(dian)源(yuan)現今采用的都是直(zhi)(zhi)流(liu)(liu)(liu)電(dian)(dian)(dian)(dian)源(yuan)，它為(wei)(wei)控制負荷(he)和(he)(he)動力負荷(he)以及直(zhi)(zhi)流(liu)(liu)(liu)事(shi)故照明負荷(he)等提(ti)供電(dian)(dian)(dian)(dian)源(yuan)，是當(dang)代(dai)電(dian)(dian)(dian)(dian)力系(xi)統控制、保護(hu)的基礎。

直流屏的應用范圍主要包括：新建或需要改造的(de)各類發電(dian)廠、水電(dian)站(zhan)；10KV、35KV、110KV、220KV、500KV等(deng)各類變電(dian)站(zhan)；為(wei)高壓開關、繼電(dian)保護、應急燈光照明等(deng)提(ti)供(gong)控制電(dian)源和操(cao)作電(dian)源；可用于、冶(ye)金、石化(hua)、電(dian)氣化(hua)鐵路等(deng)需要220V（110V）直(zhi)流(liu)(liu)電(dian)源的(de)場(chang)合；通信、鐵路交(jiao)換(huan)局、電(dian)信、農話、移動(dong)基站(zhan)，接入網(wang)等(deng)場(chang)合提(ti)供(gong)直(zhi)流(liu)(liu)電(dian)，電(dian)壓等(deng)級一般為(wei)DC48V或者DC24V。

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二、直流屏的工作原理

直流屏電力(li)操作電源系統由(you)(you)交流配電部(bu)(bu)分(fen)(fen)(fen)(fen)、整(zheng)流部(bu)(bu)分(fen)(fen)(fen)(fen)、直(zhi)流饋電部(bu)(bu)分(fen)(fen)(fen)(fen)、監(jian)控部(bu)(bu)分(fen)(fen)(fen)(fen)組(zu)成(cheng)。其中交流配電部(bu)(bu)分(fen)(fen)(fen)(fen)主要由(you)(you)交流配電單元組(zu)成(cheng)。整(zheng)流部(bu)(bu)分(fen)(fen)(fen)(fen)由(you)(you)充電模塊和隔(ge)離二極管組(zu)成(cheng)。直(zhi)流饋電部(bu)(bu)分(fen)(fen)(fen)(fen)由(you)(you)降(jiang)壓硅鏈(lian)、絕緣檢測、合閘分(fen)(fen)(fen)(fen)路和控制(zhi)分(fen)(fen)(fen)(fen)路組(zu)成(cheng)，監(jian)控部(bu)(bu)分(fen)(fen)(fen)(fen)由(you)(you)監(jian)控模塊和配電監(jian)控組(zu)成(cheng)。

系(xi)統交流輸入正常時，兩路(lu)交流輸入經交流切換控(kong)制電(dian)(dian)(dian)路(lu)選擇其中一路(lu)輸入，并(bing)(bing)通過(guo)交流配電(dian)(dian)(dian)單元(yuan)給各個充電(dian)(dian)(dian)模塊供電(dian)(dian)(dian)。充電(dian)(dian)(dian)模塊將三相交流電(dian)(dian)(dian)轉(zhuan)換為220V或110V的(de)直(zhi)流，經隔(ge)離二極管隔(ge)離后并(bing)(bing)聯輸出(chu)，一方(fang)面(mian)給電(dian)(dian)(dian)池充電(dian)(dian)(dian)，另一方(fang)面(mian)通過(guo)合閘分路(lu)和控(kong)制分路(lu)給負載(zai)提供正常的(de)直(zhi)流電(dian)(dian)(dian)源。

交流(liu)輸入停電(dian)(dian)(dian)或異常時，充(chong)電(dian)(dian)(dian)模塊停止(zhi)工(gong)作，由(you)電(dian)(dian)(dian)池通過合閘(zha)分路(lu)和控制(zhi)分路(lu)給負載供電(dian)(dian)(dian)。交流(liu)輸入恢復正常以(yi)后，充(chong)電(dian)(dian)(dian)模塊對電(dian)(dian)(dian)池充(chong)電(dian)(dian)(dian)。