一、儲能變流器是什么

儲能變流器（Power Conversion System）英文簡稱PCS，又稱儲能逆變器，可控制蓄電(dian)(dian)池的(de)充(chong)電(dian)(dian)和(he)放電(dian)(dian)過程，進行(xing)交(jiao)直流(liu)的(de)變換，在無電(dian)(dian)網情況(kuang)下可以直接為(wei)交(jiao)流(liu)負(fu)荷(he)供電(dian)(dian)。

儲能變(bian)流器(qi)(qi)(qi)PCS由(you)DC/AC雙向(xiang)變(bian)流器(qi)(qi)(qi)、控(kong)制(zhi)單元等構成。PCS控(kong)制(zhi)器(qi)(qi)(qi)通(tong)(tong)過通(tong)(tong)訊接(jie)收后臺(tai)控(kong)制(zhi)指(zhi)令，根(gen)據(ju)功率(lv)指(zhi)令的(de)符號及大小控(kong)制(zhi)變(bian)流器(qi)(qi)(qi)對(dui)電(dian)(dian)池(chi)(chi)進行(xing)充電(dian)(dian)或放電(dian)(dian)，實現對(dui)電(dian)(dian)網有(you)功功率(lv)及無(wu)功功率(lv)的(de)調節。PCS控(kong)制(zhi)器(qi)(qi)(qi)通(tong)(tong)過CAN接(jie)口與BMS通(tong)(tong)訊，獲取電(dian)(dian)池(chi)(chi)組狀態信(xin)息，可實現對(dui)電(dian)(dian)池(chi)(chi)的(de)保護(hu)性充放電(dian)(dian)，確(que)保電(dian)(dian)池(chi)(chi)運行(xing)安(an)全。

二、光伏逆變器是什么

光伏逆變器英(ying)文名為(wei)(wei)PV inverter，是(shi)指(zhi)可(ke)將光伏太陽(yang)能板產生(sheng)的可(ke)變(bian)直流電壓(ya)轉(zhuan)換(huan)為(wei)(wei)市電頻率交流電的逆變(bian)器，通常(chang)被(bei)輸電系(xi)統、電網、電站應用，是(shi)光伏陣列系(xi)統中重(zhong)要(yao)的系(xi)統平衡(heng)（BOS）之一(yi)。

光伏逆(ni)變器(qi)的缺點是只(zhi)能(neng)(neng)在白天發(fa)電(dian)(dian)，發(fa)電(dian)(dian)功率易受到(dao)天氣影(ying)響等，針對這(zhe)些問(wen)題，儲(chu)(chu)能(neng)(neng)逆(ni)變器(qi)成功問(wen)世。當(dang)(dang)負荷(he)低谷時(shi)(shi)，儲(chu)(chu)能(neng)(neng)逆(ni)變器(qi)將(jiang)輸出電(dian)(dian)能(neng)(neng)用蓄電(dian)(dian)池存(cun)(cun)儲(chu)(chu)。當(dang)(dang)負荷(he)高峰時(shi)(shi)，儲(chu)(chu)能(neng)(neng)逆(ni)變器(qi)將(jiang)釋放存(cun)(cun)儲(chu)(chu)的電(dian)(dian)能(neng)(neng)，以減少對電(dian)(dian)網的壓力。當(dang)(dang)電(dian)(dian)網陷(xian)入故(gu)障時(shi)(shi)，儲(chu)(chu)能(neng)(neng)逆(ni)變器(qi)可切換成離(li)網模式繼續供電(dian)(dian)。

三、儲能變流器和光伏逆變器的區別

1、自用率

儲能逆變器的自用率最高可到80%。光伏逆變器的(de)自用率通常在20%左右。

2、市電故障

當市(shi)電故障(zhang)時，光伏逆變(bian)器將陷入癱瘓(huan)狀態(tai)，儲能逆變(bian)器可(ke)轉換離網模(mo)式(shi)高(gao)效供電。

3、收益

在并(bing)網發電補貼(tie)下調的背(bei)景下，儲能逆(ni)變器收益將比光伏逆(ni)變器更高。

4、天氣因素

光伏逆變器有多種限制，如只能白天發電、發電功率受天氣影響、具有不可預見性等。儲能逆變器沒有以上問題。