光伏发电逆变系统中电力逆变系统及控制设计论文.doc

毕业设计(论文) 二年月日 Abstract Evelopment of world conomy and the increasing demand for energy, resulting in a shortage of energy and social development must be faced. Abundant solar energy resources, has great potential, no pollution, is the future of one of the main development of new energy sources, and photovoltaic power generation technology to solve energy shortage is an important way. Among them, the volt grid-connected inverter for photovoltaic technology,one of the main research contents. SP igital ignal rocessing hip apid development, making PV grid-connected inverter control algorithms can be chieved. First，this aper analyzes the PV grid-connected inverter research background and significance of the current development at home and abroad, and the composition of the inverter, type, topology related exposition. Secondly，photovoltaic inverter working principle were introduced, a detailed analysis of the PV inverter output current control mode, ie hysteresis current instantaneous comparisons, regular comparisons and SPWM current instantaneous current tracking mode. Then，On 10kW photovoltaic inverter design, the design includes a main circuit parameters and control circuit design. The main circuit is designed mainly refers to the choice of components, including inductors, capacitors and power switch options. Finally，use the MATLAB simulation software 10kW three-phase photovoltaic inverter simulation. Simulation results show that: The inverter output current and grid voltage, frequency and phase coherent, the power factor is 1, and the tracking speed, low harmonic content. Keywords: solar photovoltaic grid-connected inverter DSP MATLAB 目录 摘要 I Abstract II 第一章 绪论 1 1.1光伏发电逆变控制器研究的背景和意义 1 1.2 逆变器技术的发展过程 3 1.3 光伏并网逆变器发展现状 3 1.3.1 国外逆变器的发展现状 3 1.3.2 国内逆变器的发展现状 4 1.4 光伏并网逆变器的发展趋势 5 1.5 光伏逆变器存在的技术问题 6 1.6 本文的主要研究内容 7 第二章 光伏发电逆变系统及控制策略 8 2.1 光伏发电系统 8 2.2 光伏逆变器 8 2.2.1 光伏逆变器的定义 8 2.2.2 光伏逆变器的组成及结构 9 2.2.3 光伏并网逆变器的标准 10 2.2.4 光伏逆变器分类 10 2.3 并网逆变器的工作原理 13 2.4 逆变器输出电流的控制方式