自動(dòng)化外文文獻(xiàn)翻譯--光伏逆變器的發(fā)展及優(yōu)勢(shì)-文庫(kù)吧在線(xiàn)文庫(kù)
【正文】 h element repeat onoff (ON OFF), make dc input into ac output. Of course, this simply by on or off circuit to produce the inverter output waveform is not practical. General need to adopt highfrequency pulse width modulation (SPWM), close sine wave the voltage across the width change narrow, central sine wave voltage width broaden, and in the half period always let the switch element according to certain frequency in a direction action, so that form a pulse wave train (quasi sine wave). Then let the pulse wave through the simple filter form sine wave. Inverter not only has direct munication mapping function, but also has maximize solar cell performance function and system fault protection function. To sum up automatic operation and shutdown function, maximum power tracking control function, prevent run separately function (grid system), automatic voltage regulatio n function (grid system), the dc detection function (grid system), the dc grounding detection function (grid system). Here introduce automatic operation and stop function and maximum power tracking control function. 湖北理工學(xué)院 畢業(yè)設(shè)計(jì)（論文 ） 外文文獻(xiàn)翻譯 7 1 automatic operation and stop function The sunrise in the morning, the sun radiation intensity increasing, solar cell output has increased, when the inverter to the output power, the inverter automatically start running. Enter after the operation, the inverter and every minute monitoring solar cell module, as long as the output of the solar cell module the output power of the inverter is greater than the output power, inverter is continuous running。 優(yōu)勢(shì) 湖北理工學(xué)院 畢業(yè)設(shè)計(jì)（論文 ） 外文文獻(xiàn)翻譯 5 （ 1）利用清潔干凈、可再生的自然能源太陽(yáng)能發(fā)電，不耗用不可再生的、資源有限的含碳化石能源，使用中無(wú)溫室氣體和污染物排放，與生態(tài)環(huán)境和諧，符合經(jīng)濟(jì)社會(huì)可持續(xù)發(fā)展戰(zhàn)略。 切換型并網(wǎng)光伏發(fā)電系統(tǒng) 所謂切換型并 網(wǎng)光伏發(fā)電系統(tǒng)，實(shí)際上是具有自動(dòng)運(yùn)行雙向切換的功能。 ，由于太陽(yáng)電池的端電壓隨負(fù)載和日照強(qiáng)度而變化，蓄電池雖然對(duì)太陽(yáng)電池的電壓具有重要作用，但由于蓄電池的電壓隨蓄電池剩余容量和內(nèi)阻的變化而波動(dòng)，特別是當(dāng)蓄電池老化時(shí)其端電壓的變化范圍很大，如 12V 蓄電池，其端電壓可在 10V～ 16V 之間變化，這就要求逆變器必須在較大的直流輸入電壓范圍內(nèi)保證正常工作，并保證交流輸出電壓的穩(wěn)定。另外由于太陽(yáng)電池組件具有電壓隨電流增大而下降的特性，因此存在能獲取最大功率的最佳工作點(diǎn)。然后讓脈沖波通過(guò)簡(jiǎn)單的濾波器形成正弦波。一般由升壓回路和逆變橋式回路構(gòu)成。這里簡(jiǎn)單介紹自動(dòng)運(yùn)行和停機(jī)功能及最大功率跟蹤控制功能。太陽(yáng)能發(fā)電系統(tǒng)用的逆變器的最大特點(diǎn)就是包括了最大功率點(diǎn)跟蹤（ MPPT）這一功能。 發(fā)展前景 光伏并網(wǎng)發(fā)電系統(tǒng) 就是太陽(yáng)能組件產(chǎn)生的直流電經(jīng)過(guò)并網(wǎng)逆變器轉(zhuǎn)換成符合市電電網(wǎng)要求的交流電這后直接接入公共電網(wǎng)。有些切換型光伏發(fā)電系統(tǒng)，還可以在需要時(shí)斷開(kāi)為一般負(fù)載的供電，接通對(duì)應(yīng)急負(fù)載的供電。 （ 3）光伏電池組件與建筑物完美結(jié)合，既可發(fā)電又能作為建筑材料和裝飾材料，使物質(zhì)資源充分利用發(fā)揮多種功能，不但有利于降低建設(shè)費(fèi)用，并且還使建筑物科技含量提高，增加 賣(mài)點(diǎn) 。 When solar pv system provides power shortage, the power to load power supply (buy electric). Due to the power supply to the power supply with the opposite, so called countercurrent photovoltaic power generation system. 2 no current grid photovoltaic power generation system No current grid photovoltaic power generation system, solar photovoltaic power gene
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