自動化外文文獻(xiàn)翻譯--光伏逆變器的發(fā)展及優(yōu)勢-文庫吧資料
2025-05-21 18:41本頁面
【正文】 o have distributed small grid 湖北理工學(xué)院 畢業(yè)設(shè)計(jì)（論文 ） 外文文獻(xiàn)翻譯 9 generation system, especially PV power generation system, building integration is the mainstream of the bined to the grid. 1 current grid photovoltaic power generation system A current grid photovoltaic power generation system: when the solar photovoltaic system generated electricity plenty, but will be surplus power supply into the public power grid, the grid power supply (sell electric)。 Inverter bridge circuit is the booster of dc voltage equivalent to convert mon frequency ac voltage. Inverter is mainly posed of transistor and switch ponent is formed, and through the regular to switch 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。聯(lián)網(wǎng)太陽能光伏系統(tǒng)是世界各發(fā)達(dá)國家在光伏應(yīng)用領(lǐng)域競相發(fā) 展的熱點(diǎn)和重點(diǎn)，是世界太陽能光伏發(fā)電的主流發(fā)展趨勢，市場巨大，前景廣闊。 （ 4）分布式建設(shè)，就近就地分散發(fā)供電，進(jìn)入和退出電網(wǎng)靈活，既有利于增強(qiáng)電力系統(tǒng)抵御戰(zhàn)爭和災(zāi)害的能力，又有利于改善電力系統(tǒng)的負(fù)荷平衡，并可降低線路損耗。省掉蓄電池避免了蓄電池的二次污染，并可提高系統(tǒng)的平均無故障時(shí)間。 優(yōu)勢 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)社會可持續(xù)發(fā)展戰(zhàn)略。帶有儲能裝置的光伏系統(tǒng)主動性較強(qiáng)，當(dāng)電網(wǎng)出現(xiàn)停電、限電及故障時(shí)，可獨(dú)立運(yùn)行，正常向負(fù)載供電。一般切換型并網(wǎng)發(fā)電系統(tǒng)都帶有儲能裝置。二是當(dāng)電網(wǎng)因?yàn)槟撤N原因?qū)嵢煌ｋ姇r(shí)，光伏系統(tǒng)可以自動切換使 電網(wǎng)與光伏系統(tǒng)分離，成為獨(dú)立光伏發(fā)電系統(tǒng)工作狀
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