【作者】 马兰；

【导师】 何群； 闫朝阳；

【作者基本信息】 燕山大学 ， 电力电子与电力传动， 2013， 硕士

【摘要】 目前，碳、石油等常规能源短缺，大部分国家都加紧了光伏的发展步伐，据估计太阳能光伏发电将成为世界能源供应的主体。目前光伏发电面临的瓶颈之一是光伏电池的转换效率低，为了有效的利用太阳能本文提出了将光强跟踪技术与最大功率跟踪(MPPT)技术相结合的方法。本文先是介绍了独立光伏发电系统的结构、目前光强跟踪技术以及最大功率跟踪技术的现状、原理、算法和发展前景。根据光强跟踪技术和最大功率跟踪技术的发展，提出了全方位追光和双最大功率跟踪算法结合的方案。全方位追光技术实现了在垂直和水平方向跟踪太阳能，并跟踪天气情况变换跟踪方法，有效的增加了光伏电池能量的吸收。双最大功率算法采用改进的恒压控制法结合小步长扰动观察法，为减小稳态时的波动在最大功率点附近采用小步长扰动观察法，环境变化和启动过程采用改进的恒压控制法提高系统的跟踪速度。综上，该方案中全方位追光提高了系统对太阳能量的吸收，双最大功率算法提高了吸收的太阳能的利用，较大程度的提高了光伏电池的转换效率。其次，在Matlab/Simulink环境下建立了仿真模型并获得了较理想的仿真结果。最后，对系统的软、硬件设计过程进行了详细的阐述。其中主电路采用升压变换器Boost电路。数字信号处理器采用TI公司的TMS320F2812进行软件程序的编写和控制。实验得到了较理想的结果，验证了本文提出方案的可行性。更多还原

【Abstract】 Nowadays, we are faced with a shortage of energy, including oil, carbon, etc. Countries are stepping up the pace of development of photovoltaic. According to the forecast of solar photovoltaic power generation will become the main body of the world’s energy supply.Currently, one of the bottlenecks to photovoltaic power generation is the low conversion efficiency of photovoltaic cells, in order to effectively use the solar energy light, the intensity tracking technology combining with the Maximum Power Point Tracking (MPPT) technology is proposed in this paper.Firstly, the article introduces the structure of the stand-alone photovoltaic generation system and states the present situation, the principle, algorithm and the prospects for development of the intensity tracking technology combining with the Maximum PowerPoint Tracking (MPPT) technology. According to the development of their respective technology, the comprehensive of solar tracking technology combing with the double maximum power tracking algorithm is designed. The comprehensive of solar tracking technology achieved in vertical and horizontal direction tracking solar energy, changed tracking method when the weather variations, and effectively increases the energy absorption of photovoltaic cells. The double maximum power tracking algorithm uses Improvement of Constant Voltage MPPT combing with the Perturbation and Observation in small step.Near the maximum power point, the Perturbation and Observation in small step is adopted to reduce the static fluctuate change, and the improvement of Constant Voltage MPPT is needed when environment change or starting procedure in order to improve the tracking speed of the system. In conclusion, The comprehensive of solar tracking technology improves to the absorbance of solar energy, and the double maximum power algorithm improves the absorption of the sun.The conversation efficiency of photovoltaic cells is improved largely. Secondly, the simulation model in Matlab/Simulink environment is established and obtained the ideal simulation result.Finally, the paper gives a detailed software and hardware design process. The Boost converter is used as the main circuit. Digital signal processor TMS320F2812of TI company is adopted to writing and control the program.In experiments the ideal result is got and the feasibility of the proposed scheme verified.更多还原