摘要:太阳能逆变系统是通过太阳能电池板将太阳能转化为电能,并通过逆变器将直流电变为交流电,并供给负载。太阳能逆变系统的核心技术是太阳能逆变器。本文阐述了目前国内外光伏发电的现状和发展前景,光伏电池的基本发电原理及光伏发电的几种方式,且特别研究了独立运行方式的光伏发电系统,给出了硬件主回路并对各部分的功能进行了分析,并对太阳能逆变器的控制及软件实现进行了研究。在逆变部分,本设计采用脉宽调制技术控制IGBT的导通与关断,从而实现逆变,逆变后的输出再经LC滤波,使之输出为稳频稳压、滤除杂讯、失真度低的纯正正弦波。在软件仿真方面,本设计用Matlab软件对逆变进行仿真,结果达到预期效果。55833
毕业论文关键词:太阳能,光伏发电,逆变器,仿真
Abstract: Solar inverter system converts solar energy into electrical energy by solar panels, and converts the direct current into alternating current by inverter, and gives it to the load. Solar inverter is the core technology in solar inverter system.The paper describes the current status and development prospects of domestic PV, photovoltaic cells in several ways, and the basic principles of photovoltaic power generation. The paper studys the photovoltaic stand-alone mode power systems in particular,and gives the hardware of the main circuit and analyzes the functions of each part, and studys the controlling of solar inverter and software implementation. In the inverter section, the design uses pulse width modulation controlling IGBT’s turn-on and turn-off, enabling the inverter. The output filters by LC, so that the output is smooth, low distortion of pure sine wave and the output filters out noise. In terms of software simulation, the design of the inverter uses Matlab software simulation, and achieves the desired results.
Keywords: solar, photovoltaic generation, inverter, simulation
目 录
1 绪论 4
1.1 太阳能与光伏技术 4
1.2 太阳能光伏发电的特点 4
1.3 光伏发电的技术现状 6
1.4 本课题所做的工作 7
2 光伏发电基本原理及分类 7
2.1 光伏发电的基本原理 7
2.2 光伏发电系统的分类 9
3 独立光伏逆变器主回路设计 10
3.1 独立光伏逆变器的基本结构 10
3.2 硬件设计中各部分的介绍 11
3.3 逆变部分的主回路设计 12
4 太阳能逆变器的仿真 13
4.1 SPWM调制技术原理 13
4.2 SPWM的数学模型 15
4.3 三相桥式逆变器仿真 17
5 风光互补发电技术 21
5.1 风光互补发电系统的结构 21
5.2 风光互补发电系统各部分的作用 22
5.3 风光互补发电系统的应用前景 22
结 论 24
参考文献 25
致 谢 26