单相光伏网系统设计.doc

本科毕业设计（论文） 题目 单相光伏并网系统设计 学生姓名 学　号 教学院系 电气信息学院 专业年级 指导教师 职　称 副教授 单　　位 辅导教师 职 称 单　　位 完成日期 201 年 6 月 10 日 摘 要 能源是国家经济发展以及人类赖以生存和发展的重要物质基础，在当今能源紧缺的时代背景下，太阳能光伏发电的研究具有非常重要的战略意义。本文从单相光伏并网系统的主电路结构，系统拓扑结构分析，重点分析了Boost升压电路和单相全桥逆变电路。以及对可调度和不可调度方式的阐述。 本文重点设计了Boost升压电路的控制电路，即最大功率跟踪（MPPT）的设计。介绍了光伏电池的特性，为后面的仿真做好基础。对于MPPT分析了电导增量法和扰动观察法的优缺点，本文采用扰动观察法。 其次是后级并网逆变器的设计。分别对逆变部分进行了分析，重点对逆变器的控制方法，电流滞环控制，SPWM电流控制，以及电压外环控制，锁相环技术，滤波器设计进行了详细分析。 最后是整个系统仿真。由前面的分析得到前级带MPPT的Boost电路仿真模型及波形图，建立了后级的DC/AC并网的Matlab模型及结果。最后运行整个系统，得到较好的并网效果。 关键词：单相光伏并网设计；最大功率跟踪；扰动观察法；单相全桥逆变电路 Abstract Energy is the national economic development and the important material basis for human survival and development. In todays energy shortage era background, the study of solar photovoltaic power generation has a very important strategic significance. In this paper, the main circuit structure of single-phase photovoltaic grid connected system is analyzed, and the Boost boost circuit and single-phase full bridge inverter circuit are analyzed in this paper. As well as the scheduling and non scheduling approach. In this paper, we focus on the design of the control circuit of Boost boost circuit, which is the maximum power tracking (MPPT) design. This paper introduces the characteristics of photovoltaic cells, which is the basis of the simulation. The advantages and disadvantages of the conductance increment method and the disturbance observation method are analyzed, and the disturbance observation method is used in this paper. Followed by the design of the rear stage grid connected inverter. Respectively, the inverter part is analyzed, focusing on the control method of the inverter, current hysteresis control, SPWM current control, as well as the voltage outer loop control, phase locked loop technology, filter design are analyzed in detail. Finally, the whole system simulation. The Boost circuit simulation model and waveform diagram of the pre stage band MPPT are obtained from the front analysis,