本文關(guān)鍵詞： 光伏發(fā)電 逆變器 MCU控制器 系統(tǒng)設(shè)計(jì) MPPT　出處：《電子科技大學(xué)》2014年碩士論文　論文類(lèi)型：學(xué)位論文

【摘要】：隨著人類(lèi)社會(huì)的不斷發(fā)展,人們對(duì)環(huán)境質(zhì)量的要求越來(lái)越高,保護(hù)環(huán)境的呼聲不斷,與此同時(shí)隨著不可再生能源的慢慢耗盡,國(guó)家及社會(huì)對(duì)可再生能源、新能源的需求更加強(qiáng)烈。而在那些可用于發(fā)電的如太陽(yáng)能、風(fēng)能、生物質(zhì)能、潮汐能等清潔能源中,太陽(yáng)能有著顯著的優(yōu)勢(shì)。光伏發(fā)電是21世紀(jì)最熱門(mén)的能源技術(shù)之一,是未來(lái)世界能源和電力的主要來(lái)源,是解決人類(lèi)能源危機(jī)的重要手段,受到人們的廣泛關(guān)注。作為光伏并網(wǎng)發(fā)電系統(tǒng)的核心部分,光伏并網(wǎng)發(fā)電系統(tǒng)逆變器主要作用是將光伏電池陣列所產(chǎn)生的直流電壓轉(zhuǎn)換為符合國(guó)家電網(wǎng)要求的交流電,并把該交流電饋送到國(guó)家電網(wǎng)中,補(bǔ)給國(guó)家電網(wǎng)需求。光伏并網(wǎng)發(fā)電系統(tǒng)中的逆變器在太陽(yáng)能并網(wǎng)發(fā)電系統(tǒng)中起著非常重要的作用,整個(gè)光伏并網(wǎng)系統(tǒng)能否安全、可靠、穩(wěn)定、高效地運(yùn)行很大程度上取決于逆變器性能的好壞,并且在決定整個(gè)系統(tǒng)使用壽命的主要因素中占有重要分量。因此,推進(jìn)光伏并網(wǎng)逆變技術(shù)的深入研究在促進(jìn)和推廣太陽(yáng)能并網(wǎng)發(fā)電系統(tǒng)的廣泛應(yīng)用方面起著至關(guān)重要的作用。論文根據(jù)國(guó)內(nèi)外現(xiàn)有的太陽(yáng)能并網(wǎng)發(fā)電技術(shù)的研究進(jìn)展現(xiàn)狀,并闡述了研究和推廣光伏并網(wǎng)發(fā)電系統(tǒng)在高效利用新能源的現(xiàn)實(shí)意義。首先,論文著重介紹光伏并網(wǎng)發(fā)電系統(tǒng)的基本構(gòu)成、關(guān)鍵技術(shù)、工作原理,分析了幾種傳統(tǒng)光伏逆變器的優(yōu)缺點(diǎn),在此基礎(chǔ)上確定實(shí)施方案。在滿(mǎn)足光伏逆變器基本性能的前提下,本論文設(shè)計(jì)增加了過(guò)壓保護(hù)、過(guò)流保護(hù)等一系列保護(hù)電路,并利用MCU控制器對(duì)相應(yīng)的電壓、電流進(jìn)行實(shí)時(shí)監(jiān)控,保證光伏逆變系統(tǒng)最大功率輸出。其次,通過(guò)深入剖析系統(tǒng)設(shè)計(jì)的關(guān)鍵技術(shù),提出了包括新型拓?fù)浣Y(jié)構(gòu)、系統(tǒng)轉(zhuǎn)換效率的提高、智能化并網(wǎng)控制技術(shù)、檢測(cè)技術(shù)、最大功率點(diǎn)跟蹤控制(MPPT)、孤島效應(yīng)偵測(cè)與保護(hù)等一系列理論研究,為本文光伏并網(wǎng)逆變器系統(tǒng)設(shè)計(jì)的實(shí)現(xiàn)奠定了理論基礎(chǔ)。進(jìn)而通過(guò)相關(guān)理論研究和系統(tǒng)模塊設(shè)計(jì),完成系統(tǒng)的主要功能電路設(shè)計(jì)和MCU程序設(shè)計(jì)。再根據(jù)系統(tǒng)設(shè)計(jì)方案完成整個(gè)系統(tǒng)的整合、裝配,并對(duì)系統(tǒng)進(jìn)行了功能測(cè)試,各個(gè)指標(biāo)均達(dá)到預(yù)先設(shè)定值。在安全、可靠傳輸電能的前提下,滿(mǎn)足光伏發(fā)電的高質(zhì)量、高效率并入電網(wǎng)的要求,同時(shí)提高系統(tǒng)整體效率、降低制造成本。最后,針對(duì)光伏并網(wǎng)逆變器的不足展開(kāi)闡述并做出進(jìn)一步研究規(guī)劃,并對(duì)其發(fā)展前景進(jìn)行了展望。
[Abstract]:With the development of human society, the demand for environmental quality is higher and higher, and the voice of protecting the environment is constant. At the same time, with the depletion of non-renewable energy, the country and society have more and more views on renewable energy. The demand for new sources of energy is even stronger. Solar energy has a significant advantage in clean energy sources such as solar, wind, biomass, tidal energy, and so on. In 21th century, photovoltaic power generation was one of the most popular energy technologies. It is the main source of world energy and electricity in the future, is an important means to solve the human energy crisis, and has been widely concerned by people. As the core part of photovoltaic grid-connected power generation system, The main function of the inverter of photovoltaic grid-connected generation system is to convert the DC voltage generated by the photovoltaic cell array into AC which meets the requirements of the State Grid, and feed the AC to the State Grid. The inverter in the photovoltaic grid-connected generation system plays a very important role in the solar grid-connected power generation system. Can the whole photovoltaic grid-connected system be safe, reliable and stable, Efficient operation depends largely on the performance of the inverter and plays an important role in determining the service life of the whole system. The research of photovoltaic grid-connected inverter technology plays an important role in promoting and popularizing the wide application of grid-connected solar power generation system. The practical significance of studying and popularizing photovoltaic grid-connected power generation system in the efficient use of new energy is expounded. Firstly, the basic structure, key technology and working principle of photovoltaic grid-connected power generation system are introduced emphatically. The advantages and disadvantages of several traditional photovoltaic inverters are analyzed, and then the implementation scheme is determined. On the premise of satisfying the basic performance of the photovoltaic inverter, a series of protection circuits, such as over-voltage protection and over-current protection, are designed in this paper. The MCU controller is used to monitor the voltage and current in real time to ensure the maximum power output of the photovoltaic inverter system. Secondly, through the in-depth analysis of the key technology of the system design, a new topology is proposed. A series of theoretical studies such as system conversion efficiency improvement, intelligent grid-connected control technology, detection technology, maximum power point tracking control MPPTO, detection and protection of islanding effect, etc. It lays a theoretical foundation for the design of photovoltaic grid-connected inverter system, and then through the relevant theoretical research and system module design, The main function circuit design and MCU program design of the system are completed. According to the system design scheme, the integration and assembly of the whole system are completed, and the function of the system is tested. Under the premise of reliable transmission of electric energy, meet the requirements of high quality and high efficiency of photovoltaic power generation, and at the same time improve the overall efficiency of the system and reduce the manufacturing cost. The disadvantages of grid-connected photovoltaic inverter are discussed and further research planning is made, and the prospect of its development is prospected.
【學(xué)位授予單位】：電子科技大學(xué)
【學(xué)位級(jí)別】：碩士
【學(xué)位授予年份】：2014
【分類(lèi)號(hào)】：TM615

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相關(guān)期刊論文 前1條

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本文編號(hào)：1506346