逆(ni)變(bian)(bian)器(qi)作(zuo)為(wei)(wei)光伏系(xi)統(tong)的心臟(zang)，對(dui)于太(tai)陽能(neng)離網供(gong)電(dian)(dian)(dian)(dian)(dian)系(xi)統(tong)的運(yun)行(xing)起著(zhu)重(zhong)要的作(zuo)用，光伏逆(ni)變(bian)(bian)器(qi)的作(zuo)用就是把太(tai)陽能(neng)電(dian)(dian)(dian)(dian)(dian)池板所發的直(zhi)(zhi)流電(dian)(dian)(dian)(dian)(dian)轉化(hua)成(cheng)家(jia)電(dian)(dian)(dian)(dian)(dian)使用的交流電(dian)(dian)(dian)(dian)(dian)。太(tai)陽能(neng)泵(beng)變(bian)(bian)頻器(qi)一(yi)般(ban)會有(you)數個(ge)接(jie)口(kou)，可(ke)以允許太(tai)陽能(neng)模組(zu)陣列(lie)提供(gong)直(zhi)(zhi)流電(dian)(dian)(dian)(dian)(dian)流，會有(you)一(yi)個(ge)接(jie)口(kou)輸(shu)(shu)出交流電(dian)(dian)(dian)(dian)(dian)壓，光伏逆(ni)變(bian)(bian)器(qi)回收(shou)，也可(ke)能(neng)會有(you)接(jie)水(shui)位(wei)感測器(qi)輸(shu)(shu)入(ru)的接(jie)口(kou)。許多獨立(li)逆(ni)變(bian)(bian)器(qi)也整合了電(dian)(dian)(dian)(dian)(dian)池充電(dian)(dian)(dian)(dian)(dian)器(qi)，可(ke)以用交流電(dian)(dian)(dian)(dian)(dian)源為(wei)(wei)電(dian)(dian)(dian)(dian)(dian)池充電(dian)(dian)(dian)(dian)(dian)。一(yi)般(ban)這種逆(ni)變(bian)(bian)器(qi)不會接(jie)觸到電(dian)(dian)(dian)(dian)(dian)網，因此也不需要孤島效應(ying)保護(hu)機能(neng)。

光伏逆變器的功能有哪些呢？

大功率跟蹤控制功能

太陽(yang)(yang)(yang)電(dian)池(chi)組(zu)(zu)件(jian)(jian)的(de)輸(shu)出(chu)是隨(sui)太陽(yang)(yang)(yang)輻(fu)射強度(du)(du)和太陽(yang)(yang)(yang)電(dian)池(chi)組(zu)(zu)件(jian)(jian)自身溫(wen)度(du)(du)（芯(xin)片溫(wen)度(du)(du)）而(er)變(bian)(bian)化的(de)。另外由于(yu)太陽(yang)(yang)(yang)電(dian)池(chi)組(zu)(zu)件(jian)(jian)具有電(dian)壓隨(sui)電(dian)流增大(da)而(er)下降的(de)特(te)性(xing)，因(yin)此存在能(neng)獲(huo)取功(gong)(gong)(gong)率的(de)工作點(dian)(dian)(dian)。太陽(yang)(yang)(yang)輻(fu)射強度(du)(du)是變(bian)(bian)化著(zhu)的(de)，顯然工作點(dian)(dian)(dian)也是在變(bian)(bian)化的(de)。相(xiang)對于(yu)這些變(bian)(bian)化，始終(zhong)讓太陽(yang)(yang)(yang)電(dian)池(chi)組(zu)(zu)件(jian)(jian)的(de)工作點(dian)(dian)(dian)處于(yu)功(gong)(gong)(gong)率點(dian)(dian)(dian)，系統(tong)始終(zhong)從太陽(yang)(yang)(yang)電(dian)池(chi)組(zu)(zu)件(jian)(jian)獲(huo)取功(gong)(gong)(gong)率輸(shu)出(chu)，光伏逆變(bian)(bian)器設(she)計，這種控制就(jiu)是功(gong)(gong)(gong)率跟(gen)蹤控制。太陽(yang)(yang)(yang)能(neng)發電(dian)系統(tong)用(yong)的(de)逆變(bian)(bian)器的(de)特(te)點(dian)(dian)(dian)就(jiu)是包括了功(gong)(gong)(gong)率點(dian)(dian)(dian)跟(gen)蹤（MPPT）這一功(gong)(gong)(gong)能(neng)。

許(xu)多獨立逆(ni)(ni)(ni)變(bian)(bian)(bian)器也整合了電(dian)(dian)池充(chong)電(dian)(dian)器，太陽能(neng)光(guang)伏逆(ni)(ni)(ni)變(bian)(bian)(bian)器生產(chan)廠(chang)家(jia)，可以(yi)用交(jiao)流(liu)電(dian)(dian)源為電(dian)(dian)池充(chong)電(dian)(dian)。一般這(zhe)種(zhong)逆(ni)(ni)(ni)變(bian)(bian)(bian)器不(bu)會(hui)(hui)接觸到(dao)電(dian)(dian)網(wang)，因(yin)此也不(bu)需(xu)要(yao)孤(gu)島效應(ying)保護機(ji)(ji)能(neng)。并網(wang)逆(ni)(ni)(ni)變(bian)(bian)(bian)器會(hui)(hui)有安全設(she)計，若未連接到(dao)電(dian)(dian)源，安徽光(guang)伏逆(ni)(ni)(ni)變(bian)(bian)(bian)器，會(hui)(hui)自(zi)動(dong)關(guan)閉輸出。若電(dian)(dian)網(wang)電(dian)(dian)源跳電(dian)(dian)，并網(wang)逆(ni)(ni)(ni)變(bian)(bian)(bian)器沒有備存供電(dian)(dian)的(de)機(ji)(ji)能(neng)。物(wu)理上把(ba)將直流(liu)電(dian)(dian)能(neng)變(bian)(bian)(bian)換成交(jiao)流(liu)電(dian)(dian)能(neng)的(de)過程稱為逆(ni)(ni)(ni)變(bian)(bian)(bian)，把(ba)實(shi)現逆(ni)(ni)(ni)變(bian)(bian)(bian)過程的(de)裝置稱為逆(ni)(ni)(ni)變(bian)(bian)(bian)設(she)備或逆(ni)(ni)(ni)變(bian)(bian)(bian)器，逆(ni)(ni)(ni)變(bian)(bian)(bian)器的(de)名稱由(you)此而來。