在(zai)對氣(qi)候(hou)變(bian)化(hua)的(de)(de)擔憂(you)日益加深、削減溫室效益氣(qi)體勢在(zai)必(bi)行的(de)(de)形勢下，太陽能發(fa)電(dian)(dian)(dian)(dian)的(de)(de)供(gong)電(dian)(dian)(dian)(dian)方法作為一種二氧化(hua)碳排放(fang)量少于化(hua)石燃料的(de)(de)清潔發(fa)電(dian)(dian)(dian)(dian)方法愈發(fa)引起廣泛(fan)關(guan)注。但是，由于可再生資源的(de)(de)發(fa)電(dian)(dian)(dian)(dian)會受到天氣(qi)及季節的(de)(de)影響(xiang)，所以穩(wen)定(ding)供(gong)電(dian)(dian)(dian)(dian)成為難以解決(jue)的(de)(de)課題。而蓄電(dian)(dian)(dian)(dian)池可存儲發(fa)電(dian)(dian)(dian)(dian)的(de)(de)電(dian)(dian)(dian)(dian)力，所以可在(zai)發(fa)電(dian)(dian)(dian)(dian)不穩(wen)定(ding)或電(dian)(dian)(dian)(dian)力需(xu)求較高時實現(xian)供(gong)電(dian)(dian)(dian)(dian)的(de)(de)穩(wen)定(ding)化(hua)。蓄電(dian)(dian)(dian)(dian)系(xi)統(tong)(ESS：Energy Storage System)為直(zhi)流(liu)電(dian)(dian)(dian)(dian)源，所以充電(dian)(dian)(dian)(dian)/放(fang)電(dian)(dian)(dian)(dian)電(dian)(dian)(dian)(dian)路上(shang)都使用直(zhi)流(liu)電(dian)(dian)(dian)(dian)路。在(zai)不斷實現(xian)高電(dian)(dian)(dian)(dian)壓化(hua)的(de)(de)蓄電(dian)(dian)(dian)(dian)系(xi)統(tong)上(shang)，直(zhi)流(liu)電(dian)(dian)(dian)(dian)路的(de)(de)安全(quan)控(kong)制變(bian)得愈發(fa)重要(yao)。

和的公式(shi)，預(yu)充電(dian)(充電(dian))所需時間與電(dian)容器電(dian)源/電(dian)壓(ya)的關(guan)系如(ru)下(xia)所示。

＜電路條件＞
電容器容量	C[uF]=5000uF
充電電阻	R[Ω]=47Ω
電源電壓	設置為E[V]＝300V 時

應(ying)使電(dian)(dian)(dian)容器(qi)電(dian)(dian)(dian)壓盡量接近電(dian)(dian)(dian)源(yuan)電(dian)(dian)(dian)壓，否(fou)則將(jiang)會產生較大(da)的沖擊(ji)電(dian)(dian)(dian)流。在上圖所示的電(dian)(dian)(dian)路條(tiao)件下，由于電(dian)(dian)(dian)源(yuan)電(dian)(dian)(dian)壓為E[V]＝300V，所以(yi)需將(jiang)電(dian)(dian)(dian)容器(qi)電(dian)(dian)(dian)壓接近300V的數值設置(zhi)為預充電(dian)(dian)(dian)結(jie)束的電(dian)(dian)(dian)壓值。

例如：將充電結束的電壓值設置為295V。
如果選擇1秒即可使Ec[V]達到295V的電阻(R[Ω]= 47Ω)，則使用，
最大(da)電流I[max]為(wei)6.4A。

也就是說，想要1秒結束預充電、并切換為無電阻的主電路時，選擇可進行10A通電的繼電器。
請根據用戶的(de)(de)設(she)計選擇適用的(de)(de)繼(ji)電器。