摘要:RAC2.2-150-380-AP0-W1本文提出了一種經(jīng)濟(jì)型太陽(yáng)能光伏發(fā)電追日跟蹤系統(tǒng)的設(shè)計(jì),并將實(shí)測(cè)發(fā)電數(shù)據(jù)與固定式發(fā)電系統(tǒng)進(jìn)行了對(duì)比分析,為大型光伏發(fā)電企業(yè)采用此追日光伏發(fā)電跟蹤控制系統(tǒng)提供了可行性依據(jù)。經(jīng)運(yùn)行驗(yàn)證,系統(tǒng)運(yùn)行穩(wěn)定可靠,安全經(jīng)濟(jì),控制靈活,大大提高太陽(yáng)能光伏發(fā)電新能源企業(yè)的生產(chǎn)效益。
關(guān)鍵詞:光伏發(fā)電系統(tǒng),追日跟蹤,PLC
引言
RAC2.2-150-380-AP0-W1隨著光伏發(fā)電成本下降,如何獲得最高的投資收益率成為了各大投資發(fā)電企業(yè)的關(guān)注重點(diǎn)。光伏發(fā)電的原理是太陽(yáng)能電池組件吸收太陽(yáng)光輻射,將太陽(yáng)能轉(zhuǎn)化為電能輸出,而輸出的電能與太陽(yáng)能電池組件吸收的太陽(yáng)能輻射成正比,當(dāng)太陽(yáng)能電池組件垂直與太陽(yáng)光入射角時(shí)所吸收的太陽(yáng)能輻射最大,發(fā)電效率最高。光伏發(fā)電的形式分為固定式及跟蹤式,而跟蹤式光伏發(fā)電是獲得更高發(fā)電量的途徑,并且通過(guò)優(yōu)化設(shè)計(jì)機(jī)械結(jié)構(gòu)可以大大降低跟蹤系統(tǒng)的成本,使其具有遠(yuǎn)遠(yuǎn)高于固定式光伏發(fā)電的競(jìng)爭(zhēng)力。
1跟蹤控制方式分類(lèi)跟蹤式光伏發(fā)電中常見(jiàn)的跟蹤裝置的控制系統(tǒng)主要分為:RAC2.2-150-380-AP0-W1光強(qiáng)跟蹤方式、時(shí)角跟蹤方式、用戶(hù)程序跟蹤方式;而跟蹤支架主要分為單軸跟蹤及雙軸跟蹤。
光強(qiáng)跟蹤方式:RAC2.2-150-380-AP0-W1主要采用閉環(huán)控制,多利用光強(qiáng)傳感器來(lái)檢測(cè)太陽(yáng)光線與太陽(yáng)能電池組件平面入射角的偏差,當(dāng)偏差超過(guò)設(shè)定閾值時(shí),通過(guò)電機(jī)驅(qū)動(dòng)機(jī)械轉(zhuǎn)動(dòng)來(lái)減小光線偏差,直到太陽(yáng)光線與太陽(yáng)能電池組件平面垂直來(lái)實(shí)現(xiàn)對(duì)太陽(yáng)能高度角及方位角的跟蹤。根據(jù)光強(qiáng)傳感器的精度和類(lèi)型,可以應(yīng)用于單軸跟蹤及雙軸跟蹤形式的光伏發(fā)電系統(tǒng)中。
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