本文選題：光伏發(fā)電 + 最大功率跟蹤��； 參考：《武漢科技大學(xué)》2014年碩士論文

【摘要】：在能源消費(fèi)日益增長(zhǎng)和可持續(xù)發(fā)展要求越來越高的今天，太陽能光伏發(fā)電作為清潔可再生的能源，已經(jīng)逐步成為新能源開發(fā)中的主要形式。逆變器是太陽能光伏發(fā)電系統(tǒng)的核心部分，本文以光伏發(fā)電逆變系統(tǒng)為研究對(duì)象，以逆變器及其控制策略為重點(diǎn)，在PSCAD4.5Schematic環(huán)境中設(shè)計(jì)了由光伏電池，雙向Buck-Boost逆變器組成的雙級(jí)光伏逆變系統(tǒng)，仿真結(jié)果表明系統(tǒng)能夠達(dá)到設(shè)計(jì)要求。 針對(duì)光伏發(fā)電系統(tǒng)的特點(diǎn)，逆變器要有較大的直流輸入電壓范圍。本文選擇了一種新型的雙向Buck-Boost DC/AC電壓源逆變電路，由兩組雙向Buck-Boost斬波電路輸入并聯(lián)、輸出反向串聯(lián)組成，，該拓?fù)淠軌驅(qū)崿F(xiàn)單級(jí)升-降壓逆變。本文采用的是PWM控制技術(shù)對(duì)脈沖的寬度進(jìn)行調(diào)制，進(jìn)而控制開關(guān)管的占空比。為了改善多環(huán)PI控制方法中存在的紋波干擾較大的問題，本文展開了對(duì)電感電流、負(fù)載電壓、負(fù)載電流的歸一化控制方法的研究，將電流內(nèi)環(huán)控制與電壓外環(huán)控制統(tǒng)一起來，在一定程度上改善了輸出電壓的紋波問題，提高了系統(tǒng)的穩(wěn)定速度。 為了驗(yàn)證該逆變系統(tǒng)對(duì)光伏發(fā)電的適用性，本文對(duì)光伏電池及基于Boost電路的MPPT控制進(jìn)行了仿真建模，通過對(duì)比各種MPPT控制算法后，選擇了適合本系統(tǒng)的電導(dǎo)增量法，能夠較好地跟蹤到光伏電池的最大功率點(diǎn)。最后將光伏電池模塊與逆變器組成光伏發(fā)電逆變系統(tǒng)進(jìn)行了仿真聯(lián)調(diào)，分析了光照，溫度以及MPPT控制等各種影響因素，并對(duì)系統(tǒng)的輸出特性進(jìn)行了詳細(xì)的仿真測(cè)試與研究，結(jié)果表明光伏電池能工作在最大功率點(diǎn)，逆變器的輸出達(dá)到了設(shè)計(jì)指標(biāo)。
[Abstract]:With the increasing of energy consumption and the increasing requirement of sustainable development, solar photovoltaic power generation, as a clean and renewable energy, has gradually become the main form of new energy development. Inverter is the core part of solar photovoltaic system. In this paper, a photovoltaic cell is designed in the PSCAD4.5Schematic environment, focusing on the inverter and its control strategy, taking the photovoltaic inverter system as the research object, and focusing on the inverter and its control strategy. The simulation results show that the two-stage photovoltaic inverter system composed of bidirectional Buck-Boost inverter can meet the design requirements. According to the characteristics of photovoltaic system, the inverter should have a large DC input voltage range. In this paper, a new type of bidirectional Buck-Boost DC/AC voltage source inverter is selected, which consists of two sets of bidirectional Buck-Boost chopping circuits in parallel input and output in series. This topology can realize single-stage rise-down inverter. In this paper, the PWM control technique is used to modulate the pulse width and then control the duty cycle of the switch tube. In order to improve the problem of large ripple interference in the multi-loop Pi control method, the normalization control method of inductance current, load voltage and load current is studied in this paper, which unifies the current inner loop control with the voltage outer loop control. To some extent, the ripple problem of output voltage is improved, and the stable speed of the system is improved. In order to verify the applicability of the inverter system to photovoltaic power generation, the photovoltaic cell and MPPT control based on Boost circuit are simulated and modeled in this paper. After comparing various MPPT control algorithms, the conductance increment method suitable for the system is selected. It can track the maximum power point of photovoltaic cell well. Finally, the photovoltaic inverter system composed of PV cell module and inverter is simulated and adjusted, and various influencing factors such as illumination, temperature and MPPT control are analyzed, and the output characteristics of the system are tested and studied in detail. The results show that the photovoltaic cell can work at the maximum power point and the output of the inverter reaches the design target.
【學(xué)位授予單位】：武漢科技大學(xué)
【學(xué)位級(jí)別】：碩士
【學(xué)位授予年份】：2014
【分類號(hào)】：TM615

【參考文獻(xiàn)】

相關(guān)期刊論文 前10條

1 郝t;逆變器技術(shù)的發(fā)展趨勢(shì)[J];船電技術(shù);1997年04期

2 耿攀;吳衛(wèi)民;葉銀忠;劉以建;;基于重復(fù)控制的單相分時(shí)復(fù)合級(jí)聯(lián)光伏逆變器控制[J];電工技術(shù)學(xué)報(bào);2011年03期

3 陳亞愛;張衛(wèi)平;周京華;劉坤;;開關(guān)變換器控制技術(shù)綜述[J];電氣應(yīng)用;2008年04期

4 王林兵;何湘寧;;UPS逆變器控制方法比較分析[J];電源技術(shù)應(yīng)用;2005年01期

5 張昌盛,段善旭,康勇;基于電流內(nèi)環(huán)的一種逆變器控制策略研究[J];電力電子技術(shù);2005年03期

6 張靈改;陳道煉;;Buck-Boost型變換器電路結(jié)構(gòu)及其演化[J];電力電子技術(shù);2009年04期

7 王信茂;;對(duì)“十二五”加快電力發(fā)展方式轉(zhuǎn)變的思考[J];能源技術(shù)經(jīng)濟(jì);2010年05期

8 董密;羅安;;光伏并網(wǎng)發(fā)電系統(tǒng)中逆變器的設(shè)計(jì)與控制方法[J];電力系統(tǒng)自動(dòng)化;2006年20期

9 楊春來;陳文穎;林永君;劉衛(wèi)亮;;基于改進(jìn)擾動(dòng)觀察法的光伏陣列最大功率跟蹤器的研究[J];電子質(zhì)量;2011年12期

10 周林;武劍;栗秋華;郭珂;;光伏陣列最大功率點(diǎn)跟蹤控制方法綜述[J];高電壓技術(shù);2008年06期

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