【作者】 申智；

【导师】 祝龙记；

【作者基本信息】 安徽理工大学 ， 电力电子与电力传动， 2010， 硕士

【摘要】 随着社会经济的发展,能源的日益减少和环境污染成为当代社会关注的重大问题,太阳能资源作为一种可再生清洁能源,使得光伏发电技术越来越受到人们的青睐。科学技术的进步,太阳能控制系统性能的提高,特别是在光伏逆变器技术上的飞速发展,成本的降低,使得光伏产业在世界范围内有着广阔的市场前景,因此,研究光伏并网逆变器有着重要的意义。本文对两级式三相并网光伏逆变器进行了详细的研究。首先对逆变器前级升压部分的原理与作用进行阐述,并介绍在升压部分进行太阳能最大功率点的多种控制方法,得出在光伏系统的升压部分使用扰动观察法进行最大功率控制具有控制简单、控制参数少的优点,分析了其控制过程。然后对光伏逆变器的后级逆变部分进行分析,详细研究了三相电压源型SPWM逆变器技术,阐述了三相逆变器的工作原理和工作过程,根据光伏系统的特性,对并网电压型逆变器采用电流控制策略,采用电流内环,电压外环的闭环控制方式后,使得系统具有良好的稳定的控制性能。在此基础上,对光伏逆变器孤岛效应进行了分析。最后,在理论分析和系统设计的基础上,对太阳能逆变器进行硬件和软件设计,包括：主电路功率器件的选择,滤波电感的设计,控制回路、采样电路、保护电路等,并对最大功率点的控制和SPWM的DSP实现进行软件设计,对系统进行调试实验,分析实验结果,证明该光伏逆变系统并网后电压与电流同相位,功率因数为1,并网成功。图[39]表[1]参[40]更多还原

【Abstract】 As social and economic development, energy reduction and environmental pollution increasingly become the major issues of society. Solar energy resources as a renewable clean energy, it makes people concerned about the photovoltaic technology. Scientific and technological progress, improvement performance of solar control systems, especially in the photovoltaic inverter technology rapid development and cost reduction, makes the worldwide PV industry have broad market prospects. Therefore the study of PV grid-connected inverter has an important significance.In this paper, three-phase grid-connected photovoltaic inverter carried out a detailed study. First of all, set out the principles and the role of boost circuit in the inverter, and describes a variety of control methods of the solar maximum power point tracking. In the photovoltaic system, using the observation and disturbance method makes maximum power point tracking control simple, and have the advantages of fewer control parameters, then analysis its control processes. Next, analysis PV inverter detaily and three-phase voltage source SPWM inverter technology, describes the working principle of three-phase inverter and the work processes. According to the characteristics of PV systems, the grid voltage-type inverter use current control strategies. With current-voltage double-loop control mode, make the system has good control performance. On this basis, island effect were analyzed in the PV inverter systemFinally, on the basis of theoretical analysis and system design, design inverter hardware and software design, which are included the choice of the main circuit power device, filter inductor design, control loop, the sampling circuit, protection circuit, maximum power point tracking control and SPWM software design in the DSP. After debugging the system test and analyzing the experimental results, the correctness and feasibility of the PV inverter system can be proved.Figure [39] table [1] reference [40]更多还原