太陽能發電(dian)系統各部分的作用(yong)為：

逆變(bian)器(qi)(qi)：在很多(duo)場合(he)，都需(xu)要(yao)提供220VAC、110VAC的(de)交流電(dian)(dian)(dian)源。由于太(tai)(tai)陽(yang)(yang)能(neng)(neng)(neng)(neng)的(de)直接輸出一(yi)般都是12VDC、24VDC、48VDC。為能(neng)(neng)(neng)(neng)向220VAC的(de)電(dian)(dian)(dian)器(qi)(qi)提供電(dian)(dian)(dian)能(neng)(neng)(neng)(neng)，需(xu)要(yao)將太(tai)(tai)陽(yang)(yang)能(neng)(neng)(neng)(neng)發電(dian)(dian)(dian)系統所發出的(de)直流電(dian)(dian)(dian)能(neng)(neng)(neng)(neng)轉(zhuan)換成(cheng)交流電(dian)(dian)(dian)能(neng)(neng)(neng)(neng)，因此需(xu)要(yao)使用DC-AC逆變(bian)器(qi)(qi)。在某些場合(he)，需(xu)要(yao)使用多(duo)種電(dian)(dian)(dian)壓的(de)負載(zai)時(shi)，也(ye)要(yao)用到DC-DC逆變(bian)器(qi)(qi)，太(tai)(tai)陽(yang)(yang)能(neng)(neng)(neng)(neng)發電(dian)(dian)(dian)板(ban)價格，如將24VDC的(de)電(dian)(dian)(dian)能(neng)(neng)(neng)(neng)轉(zhuan)換成(cheng)5VDC的(de)電(dian)(dian)(dian)能(neng)(neng)(neng)(neng)。

太陽能發電(dian)(dian)系(xi)統(tong)分為離(li)網發電(dian)(dian)系(xi)統(tong)與并(bing)網發電(dian)(dian)系(xi)統(tong)：

1、離網發電系統(tong)。主要由太陽能電池組(zu)件、控制器、蓄(xu)電池組(zu)成，若要為(wei)交流負載供電，還需(xu)要配置交流逆變(bian)器。

2、并(bing)網(wang)發(fa)(fa)電(dian)(dian)(dian)(dian)(dian)系(xi)統(tong)就是太陽能(neng)組件(jian)產生的直流(liu)電(dian)(dian)(dian)(dian)(dian)經過并(bing)網(wang)逆變器轉換(huan)成(cheng)符(fu)合市電(dian)(dian)(dian)(dian)(dian)電(dian)(dian)(dian)(dian)(dian)網(wang)要求的交流(liu)電(dian)(dian)(dian)(dian)(dian)這(zhe)(zhe)后直接接入(ru)公共電(dian)(dian)(dian)(dian)(dian)網(wang)。并(bing)網(wang)發(fa)(fa)電(dian)(dian)(dian)(dian)(dian)系(xi)統(tong)有集(ji)中式大(da)(da)型并(bing)網(wang)電(dian)(dian)(dian)(dian)(dian)站一般(ban)都是國1家級電(dian)(dian)(dian)(dian)(dian)站，主要特點(dian)(dian)是將所發(fa)(fa)電(dian)(dian)(dian)(dian)(dian)能(neng)直接輸送(song)到電(dian)(dian)(dian)(dian)(dian)網(wang)，由電(dian)(dian)(dian)(dian)(dian)網(wang)統(tong)一調配向用戶供電(dian)(dian)(dian)(dian)(dian)。但這(zhe)(zhe)種電(dian)(dian)(dian)(dian)(dian)站投資大(da)(da)、建(jian)設(she)周(zhou)期長(chang)、占(zhan)地面(mian)積(ji)大(da)(da)，發(fa)(fa)展難度較(jiao)大(da)(da)。而分散(san)式小(xiao)型并(bing)網(wang)發(fa)(fa)電(dian)(dian)(dian)(dian)(dian)系(xi)統(tong)，特別(bie)是光伏建(jian)筑一體(ti)化發(fa)(fa)電(dian)(dian)(dian)(dian)(dian)系(xi)統(tong)，由于(yu)投資小(xiao)、建(jian)設(she)快、占(zhan)地面(mian)積(ji)小(xiao)、政(zheng)策(ce)支持力(li)度大(da)(da)等優(you)點(dian)(dian)，是并(bing)網(wang)發(fa)(fa)電(dian)(dian)(dian)(dian)(dian)的主流(liu)。

并網太陽能發電系統

并網(wang)(wang)(wang)，就是(shi)必(bi)須連接(jie)到(dao)公(gong)共(gong)(gong)(gong)電(dian)(dian)(dian)(dian)網(wang)(wang)(wang)，就是(shi)太陽(yang)(yang)(yang)能發(fa)(fa)電(dian)(dian)(dian)(dian)、家庭電(dian)(dian)(dian)(dian)網(wang)(wang)(wang)、公(gong)共(gong)(gong)(gong)電(dian)(dian)(dian)(dian)網(wang)(wang)(wang)聯(lian)系在一起了，這是(shi)必(bi)須依賴現有電(dian)(dian)(dian)(dian)網(wang)(wang)(wang)才能運行的發(fa)(fa)電(dian)(dian)(dian)(dian)系統(tong)。主要由(you)太陽(yang)(yang)(yang)能電(dian)(dian)(dian)(dian)池(chi)板和逆變器(qi)組成，太陽(yang)(yang)(yang)能電(dian)(dian)(dian)(dian)池(chi)板發(fa)(fa)出直(zhi)接(jie)經逆變器(qi)轉換成220V交流電(dian)(dian)(dian)(dian)并給家用電(dian)(dian)(dian)(dian)器(qi)供電(dian)(dian)(dian)(dian)，當太陽(yang)(yang)(yang)能的發(fa)(fa)電(dian)(dian)(dian)(dian)量超(chao)過家用電(dian)(dian)(dian)(dian)器(qi)使用的電(dian)(dian)(dian)(dian)量時(shi)，多余的電(dian)(dian)(dian)(dian)就輸送到(dao)了公(gong)共(gong)(gong)(gong)電(dian)(dian)(dian)(dian)網(wang)(wang)(wang);而當太陽(yang)(yang)(yang)能的發(fa)(fa)電(dian)(dian)(dian)(dian)量不(bu)能滿(man)足家用電(dian)(dian)(dian)(dian)器(qi)使用時(shi)，就自動從電(dian)(dian)(dian)(dian)網(wang)(wang)(wang)中補充。而這整(zheng)個過程都是(shi)智能控(kong)制的，不(bu)需要人為開(kai)或關。這種(zhong)系統(tong)由(you)于(yu)可以免除(chu)使用蓄電(dian)(dian)(dian)(dian)池(chi)池(chi)，大大節省了系統(tong)的成本。