直(zhi)流(liu)屏(ping)是我(wo)们在发电厂和(he)变电站中用来提供(gong)直(zhi)流(liu)电源的(de)装(zhuang)置。它作(zuo)为一种理想的(de)蓄电池直(zhi)流(liu)电源屏(ping)，具有体积(ji)小，电压(ya)稳定，能(neng)量(liang)大等特点，随着社会的(de)发展，现(xian)在使(shi)用越(yue)来越(yue)广泛。那么直(zhi)流(liu)屏(ping)厂家直(zhi)流(liu)屏(ping)的(de)传输(shu)方法与哪几方面的(de)因素有关？
1.数组大小
通(tong)常，使用一个或两个600伏(fu)光伏(fu)阵列(lie)串会很好(hao)地工(gong)作。如果至(zhi)大输(shu)入电压(ya)为(wei)600伏(fu)，Voc工(gong)作窗(chuang)口将(jiang)在100至(zhi)525伏(fu)之间(jian)。对于(yu)(yu)部分遮挡或被(bei)雪覆盖的阵列(lie)，使用低(di)工(gong)作输(shu)入电压(ya)。保持阵列(lie)Voc低(di)于(yu)(yu)570V，以便在低(di)温下生产。600伏(fu)转(zhuan)换开关额定至(zhi)大电流为(wei)30安，即至(zhi)大电流。Isc应小于(yu)(yu)或等于(yu)(yu)24A
2.逆变器/充电器
直(zhi)(zhi)流屏厂家子阵列配置可以通(tong)过带较大(da)逆(ni)(ni)变(bian)(bian)(bian)(bian)器(qi)(qi)的融合转换盒或双输(shu)出组合器(qi)(qi)盒来管理，因(yin)此(ci)阵列的一部分通(tong)过控制器(qi)(qi)布线，另一部分直(zhi)(zhi)接(jie)布线到(dao)逆(ni)(ni)变(bian)(bian)(bian)(bian)器(qi)(qi)。逆(ni)(ni)变(bian)(bian)(bian)(bian)器(qi)(qi)/充电(dian)(dian)(dian)(dian)器(qi)(qi)在并(bing)网(wang)(wang)运行期(qi)间保(bao)(bao)持(chi)电(dian)(dian)(dian)(dian)池浮动(dong)。备(bei)(bei)份期(qi)间，并(bing)网(wang)(wang)逆(ni)(ni)变(bian)(bian)(bian)(bian)器(qi)(qi)保(bao)(bao)持(chi)关闭状态(tai)，并(bing)与阵列和(he)(he)备(bei)(bei)份交(jiao)流电(dian)(dian)(dian)(dian)路(lu)断开连接(jie)。因(yin)此(ci)，逆(ni)(ni)变(bian)(bian)(bian)(bian)器(qi)(qi)/充电(dian)(dian)(dian)(dian)器(qi)(qi)的配置和(he)(he)尺(chi)寸独(du)立(li)于并(bing)网(wang)(wang)逆(ni)(ni)变(bian)(bian)(bian)(bian)器(qi)(qi)。可以使用单相、分相或三相逆(ni)(ni)变(bian)(bian)(bian)(bian)器(qi)(qi)充电(dian)(dian)(dian)(dian)器(qi)(qi)配置。备(bei)(bei)用逆(ni)(ni)变(bian)(bian)(bian)(bian)器(qi)(qi)/充电(dian)(dian)(dian)(dian)器(qi)(qi)的尺(chi)寸是(shi)通(tong)过计(ji)算(suan)备(bei)(bei)用负载的至大(da)连续和(he)(he)启动(dong)浪涌(yong)功率要求(qiu)来确(que)定的。
3.电池尺寸
无论阵列(lie)大(da)小如何(he)，直流屏电(dian)(dian)(dian)池组(zu)(zu)(zu)也是可(ke)(ke)扩(kuo)展的(de)。电(dian)(dian)(dian)池大(da)小计(ji)算可(ke)(ke)以(yi)基(ji)于(yu)关键负载需求所需的(de)千瓦时/天和所需的(de)备用电(dian)(dian)(dian)源(yuan)天数。至(zhi)小电(dian)(dian)(dian)池组(zu)(zu)(zu)尺寸基(ji)于(yu)每个控制器(qi)(qi)的(de)至(zhi)大(da)充(chong)(chong)电(dian)(dian)(dian)电(dian)(dian)(dian)流60A。电(dian)(dian)(dian)池的(de)至(zhi)大(da)充(chong)(chong)电(dian)(dian)(dian)率通常为碳(tan)/20Ah额定值的(de)15%至(zhi)30%。控制器(qi)(qi)可(ke)(ke)以(yi)定制编程，以(yi)降(jiang)低较小电(dian)(dian)(dian)池组(zu)(zu)(zu)的(de)至(zhi)大(da)充(chong)(chong)电(dian)(dian)(dian)电(dian)(dian)(dian)流。逆变器(qi)(qi)/充(chong)(chong)电(dian)(dian)(dian)器(qi)(qi)的(de)至(zhi)大(da)充(chong)(chong)电(dian)(dian)(dian)电(dian)(dian)(dian)流也可(ke)(ke)以(yi)降(jiang)低。
直流屏(ping)厂家在(zai)阳(yang)光明(ming)媚的日子里，控制器使用有限的阵列功率给电池(chi)充(chong)电，并(bing)“忽略”可(ke)能损坏较(jiao)小(xiao)电池(chi)组(zu)的多余功率。在(zai)阴天，当需要(yao)提(ti)供(gong)与较(jiao)大的交流耦合系统相(xiang)同数量(liang)的备用电源时，可(ke)以接受全阵列电源。
关键(jian)负载备(bei)份要求通常显著低于每日与(yu)(yu)电网(wang)相(xiang)关的(de)使(shi)用。DC转移解决方案可以提供缩小的(de)备(bei)份选项，与(yu)(yu)并(bing)网(wang)光伏系统的(de)规模(mo)无关。
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