? ? ? 直(zhi)流(liu)(liu)屏(ping)(ping)是我(wo)們在(zai)發(fa)電廠(chang)(chang)和(he)變電站中用來(lai)(lai)提供(gong)直(zhi)流(liu)(liu)電源的裝(zhuang)置。它作為一種理想的蓄(xu)電池直(zhi)流(liu)(liu)電源屏(ping)(ping)，具有體積小，電壓穩定，能量(liang)大等特點，隨著社會的發(fa)展(zhan)，現在(zai)使用越來(lai)(lai)越廣泛。那么直(zhi)流(liu)(liu)屏(ping)(ping)廠(chang)(chang)家直(zhi)流(liu)(liu)屏(ping)(ping)的傳輸(shu)方法(fa)與哪幾方面的因素有關？ ?

??????1.數組大小 ?

??????通常，使(shi)用(yong)一個或兩(liang)個600伏光伏陣列串會很好地工作(zuo)。如果(guo)至(zhi)大輸入(ru)(ru)電(dian)(dian)壓(ya)(ya)為(wei)600伏，Voc工作(zuo)窗(chuang)口將在100至(zhi)525伏之間(jian)。對(dui)于(yu)部分遮(zhe)擋或被(bei)雪覆蓋的陣列，使(shi)用(yong)低工作(zuo)輸入(ru)(ru)電(dian)(dian)壓(ya)(ya)。保持陣列Voc低于(yu)570V，以便(bian)在低溫下生產。600伏轉換開關(guan)額定至(zhi)大電(dian)(dian)流(liu)為(wei)30安，即至(zhi)大電(dian)(dian)流(liu)。Isc應(ying)小于(yu)或等于(yu)24A ?

??????2.逆變器/充電器 ?

??????直(zhi)(zhi)流屏(ping)廠家子陣列(lie)配置可(ke)以(yi)通(tong)過帶較大逆(ni)(ni)變(bian)(bian)器(qi)(qi)(qi)(qi)的融合(he)轉換盒或雙輸出組合(he)器(qi)(qi)(qi)(qi)盒來管理，因(yin)此陣列(lie)的一部分通(tong)過控(kong)制(zhi)器(qi)(qi)(qi)(qi)布(bu)(bu)線，另一部分直(zhi)(zhi)接(jie)布(bu)(bu)線到(dao)逆(ni)(ni)變(bian)(bian)器(qi)(qi)(qi)(qi)。逆(ni)(ni)變(bian)(bian)器(qi)(qi)(qi)(qi)/充(chong)電(dian)(dian)器(qi)(qi)(qi)(qi)在(zai)并(bing)網(wang)運行期(qi)間(jian)保(bao)持電(dian)(dian)池浮動。備(bei)(bei)份期(qi)間(jian)，并(bing)網(wang)逆(ni)(ni)變(bian)(bian)器(qi)(qi)(qi)(qi)保(bao)持關閉狀(zhuang)態，并(bing)與陣列(lie)和備(bei)(bei)份交流電(dian)(dian)路斷開連接(jie)。因(yin)此，逆(ni)(ni)變(bian)(bian)器(qi)(qi)(qi)(qi)/充(chong)電(dian)(dian)器(qi)(qi)(qi)(qi)的配置和尺(chi)(chi)寸獨立于并(bing)網(wang)逆(ni)(ni)變(bian)(bian)器(qi)(qi)(qi)(qi)。可(ke)以(yi)使用(yong)單相(xiang)(xiang)、分相(xiang)(xiang)或三相(xiang)(xiang)逆(ni)(ni)變(bian)(bian)器(qi)(qi)(qi)(qi)充(chong)電(dian)(dian)器(qi)(qi)(qi)(qi)配置。備(bei)(bei)用(yong)逆(ni)(ni)變(bian)(bian)器(qi)(qi)(qi)(qi)/充(chong)電(dian)(dian)器(qi)(qi)(qi)(qi)的尺(chi)(chi)寸是(shi)通(tong)過計算備(bei)(bei)用(yong)負載的至大連續和啟動浪涌功(gong)率要(yao)求來確定(ding)的。

??????3.電池尺寸 ?

??????無論(lun)陣列大(da)(da)(da)小(xiao)(xiao)如(ru)何，直流(liu)屏電(dian)(dian)(dian)池(chi)組也是可(ke)(ke)擴(kuo)展的(de)(de)。電(dian)(dian)(dian)池(chi)大(da)(da)(da)小(xiao)(xiao)計算可(ke)(ke)以(yi)基(ji)(ji)于(yu)(yu)關鍵負(fu)載需(xu)求所需(xu)的(de)(de)千(qian)瓦時/天和所需(xu)的(de)(de)備用電(dian)(dian)(dian)源天數。至(zhi)小(xiao)(xiao)電(dian)(dian)(dian)池(chi)組尺寸基(ji)(ji)于(yu)(yu)每個控制(zhi)器(qi)的(de)(de)至(zhi)大(da)(da)(da)充電(dian)(dian)(dian)電(dian)(dian)(dian)流(liu)60A。電(dian)(dian)(dian)池(chi)的(de)(de)至(zhi)大(da)(da)(da)充電(dian)(dian)(dian)率通(tong)常為碳(tan)/20Ah額定值的(de)(de)15%至(zhi)30%。控制(zhi)器(qi)可(ke)(ke)以(yi)定制(zhi)編(bian)程，以(yi)降低較小(xiao)(xiao)電(dian)(dian)(dian)池(chi)組的(de)(de)至(zhi)大(da)(da)(da)充電(dian)(dian)(dian)電(dian)(dian)(dian)流(liu)。逆變(bian)器(qi)/充電(dian)(dian)(dian)器(qi)的(de)(de)至(zhi)大(da)(da)(da)充電(dian)(dian)(dian)電(dian)(dian)(dian)流(liu)也可(ke)(ke)以(yi)降低。 ?

??????直流屏廠家在陽光明(ming)媚的(de)(de)日子里，控(kong)制器使用(yong)(yong)有限(xian)的(de)(de)陣(zhen)列(lie)功(gong)(gong)率給電(dian)池充電(dian)，并“忽(hu)略(lve)”可能損壞較小電(dian)池組的(de)(de)多余功(gong)(gong)率。在陰(yin)天，當需要提供與較大的(de)(de)交(jiao)流耦合系統相同數量的(de)(de)備用(yong)(yong)電(dian)源時，可以(yi)接受全陣(zhen)列(lie)電(dian)源。 ?

??????關鍵(jian)負載備(bei)份要求通常顯著低(di)于每日(ri)與電網相關的(de)(de)使用。DC轉移解決方(fang)案可(ke)以提供縮小的(de)(de)備(bei)份選項，與并網光(guang)伏(fu)系統的(de)(de)規模無關。

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