本文選題：光伏發(fā)電　切入點(diǎn)：光強(qiáng)檢測(cè)跟蹤　出處：《電子科技大學(xué)》2014年碩士論文　論文類型：學(xué)位論文

【摘要】：隨著當(dāng)今世界能源短缺與環(huán)境污染問(wèn)題的日益嚴(yán)重,可再生能源與清潔能源的利用越來(lái)越多地受到人們的重視。光伏發(fā)電就是對(duì)太陽(yáng)能這種可再生能源直接而最有效的利用,因此研究提高太陽(yáng)能光伏發(fā)電的轉(zhuǎn)換效率及利用率具有非常重要的理論研究意義和實(shí)際價(jià)值。目前光伏發(fā)電面臨的主要瓶頸是光伏電池的轉(zhuǎn)換效率低以及單位面積接收的輻射量較少。為了提高太陽(yáng)能的利用率及轉(zhuǎn)換效率,本文提出了光強(qiáng)檢測(cè)跟蹤與視日軌跡跟蹤相結(jié)合的跟蹤方式。為了提高太陽(yáng)能光伏發(fā)電的利用率,本文也對(duì)最大功率點(diǎn)跟蹤(MPPT)技術(shù)進(jìn)行了相關(guān)研究。首先,本文對(duì)光伏發(fā)電系統(tǒng)及光伏跟蹤系統(tǒng)的現(xiàn)狀、原理、算法和發(fā)展前景進(jìn)行了詳細(xì)的介紹。根據(jù)光伏跟蹤的發(fā)展與研究歷程,提出了一種以STC12C5A60S2單片機(jī)為控制器,采用了光強(qiáng)檢測(cè)跟蹤和視日軌跡跟蹤相結(jié)合的跟蹤方式。這種跟蹤方式可以實(shí)現(xiàn)在垂直和水平兩個(gè)方向?qū)μ?yáng)光線進(jìn)行跟蹤,從而更加有效地增加了對(duì)太陽(yáng)能的利用。本系統(tǒng)能夠依據(jù)天氣狀況自動(dòng)切換跟蹤模式,在晴天時(shí)采用光強(qiáng)檢測(cè)跟蹤模式,而陰天則采用視日軌跡跟蹤模式,在晚上系統(tǒng)不進(jìn)行跟蹤以減少系統(tǒng)的能耗。其次,本文對(duì)最大功率點(diǎn)跟蹤的現(xiàn)狀、原理、算法和發(fā)展前景進(jìn)行了詳細(xì)的介紹,對(duì)最大功率點(diǎn)跟蹤常見(jiàn)的算法進(jìn)行了分析與比較,并能在其基礎(chǔ)上進(jìn)行改進(jìn),并在Matlab/Simulink環(huán)境下進(jìn)行建模和仿真。本文在軟件設(shè)計(jì)方面采用了模塊化的思想即將系統(tǒng)劃分成幾個(gè)子模塊:光伏發(fā)電跟蹤主程序、光強(qiáng)檢測(cè)跟蹤子程序、視日軌跡跟蹤子程序、電機(jī)驅(qū)動(dòng)子程序以及時(shí)鐘子程序等。本文對(duì)硬件電路的設(shè)計(jì)進(jìn)行了詳細(xì)的闡述,最后對(duì)系統(tǒng)的各個(gè)模塊以及整個(gè)系統(tǒng)進(jìn)行了測(cè)試。測(cè)試結(jié)果表明實(shí)現(xiàn)了太陽(yáng)位置的自動(dòng)跟蹤。本文也對(duì)光伏電池板進(jìn)行了建模并進(jìn)行了仿真,同時(shí)也對(duì)改進(jìn)的最大功率點(diǎn)跟蹤算法進(jìn)行建模與仿真,并與傳統(tǒng)的固定步長(zhǎng)電導(dǎo)增量跟蹤算法進(jìn)行對(duì)比,驗(yàn)證了改進(jìn)算法的可行性與正確性,實(shí)現(xiàn)了最大功率點(diǎn)的跟蹤。
[Abstract]:With the increasingly serious problems of energy shortage and environmental pollution in the world nowadays, people pay more and more attention to the utilization of renewable energy and clean energy. Photovoltaic power generation is the direct and most effective use of solar energy. Therefore, the research on improving the conversion efficiency and efficiency of solar photovoltaic power generation has very important theoretical research significance and practical value. At present, the main bottleneck of photovoltaic power generation is the low conversion efficiency of photovoltaic cells and the unit surface. In order to improve the utilization and conversion efficiency of solar energy, In order to improve the utilization of solar photovoltaic power generation, the MPPTT technology of maximum power point tracking is also studied in this paper. First of all, in order to improve the efficiency of solar photovoltaic power generation, the maximum power point tracking (MPPTT) technology is also studied. In this paper, the current situation, principle, algorithm and development prospect of photovoltaic power generation system and photovoltaic tracking system are introduced in detail. According to the development and research history of photovoltaic tracking, a controller based on STC12C5A60S2 microcontroller is proposed. Using the combination of intensity detection and sun track tracking, this tracking method can track solar light in both vertical and horizontal directions. The system can automatically switch the tracking mode according to the weather conditions, and adopt the light intensity detection and tracking mode in sunny days, while the sun track tracking mode is used in cloudy days. In the evening, the system does not track to reduce the energy consumption of the system. Secondly, this paper introduces the current situation, principle, algorithm and development prospects of maximum power point tracking in detail, and analyzes and compares the common algorithms of maximum power point tracking. It can be improved on the basis of it, and modeled and simulated in Matlab/Simulink environment. In software design, the system is divided into several sub-modules: photovoltaic power generation tracking main program, light intensity detection and tracking subroutine, in software design, the system is divided into several sub-modules: photovoltaic power generation tracking main program, light intensity detection and tracking subroutine. The track tracking subroutine, motor drive subroutine and clock subroutine are discussed in detail in this paper. Finally, each module of the system and the whole system are tested. The test results show that the automatic tracking of the solar position is realized. In this paper, the photovoltaic panel is also modeled and simulated. At the same time, the improved maximum power point tracking algorithm is modeled and simulated, and compared with the traditional fixed-step conductance incremental tracking algorithm, the feasibility and correctness of the improved algorithm are verified, and the maximum power point tracking is realized.
【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
【分類號(hào)】：TM615

【參考文獻(xiàn)】

相關(guān)期刊論文 前4條

1 許啟明;馮俊偉;宮明;;太陽(yáng)能利用跟蹤技術(shù)的研究進(jìn)展[J];安徽農(nóng)業(yè)科學(xué);2011年10期

2 羅隆福;李鑫;李芬芬;;光伏系統(tǒng)最大功率點(diǎn)跟蹤算法的改進(jìn)及應(yīng)用[J];電力電子技術(shù);2011年04期

3 王志輝;史紅霞;任超;;太陽(yáng)自動(dòng)跟蹤裝置計(jì)算機(jī)控制系統(tǒng)[J];機(jī)械制造;2008年11期

4 田英;羅_g;于寧;;光伏發(fā)電系統(tǒng)最大功率點(diǎn)跟蹤算法研究[J];火炮發(fā)射與控制學(xué)報(bào);2013年01期

相關(guān)碩士學(xué)位論文 前1條

1 陳坤;光伏發(fā)電系統(tǒng)MPPT控制算法研究[D];重慶大學(xué);2013年

，

本文編號(hào)：1622709