并网逆变器论文：并网逆变器 转换效率 正弦脉宽调制技术 空间矢量调制技术 损耗分析.docVIP

【关键词】并网逆变器 转换效率 正弦脉宽调制技术 空间矢量调制技术 损耗分析 【英文关键词】Grid-connected inverter conversion efficiency sinusoidal pulse widthmodulation technique space vector modulation technique loss analysis 并网逆变器论文：太阳能三相并网逆变器的效率研究 【中文摘要】在光伏发电系统中,转换效率是并网逆变器的一个非常重要的指标,如何在开关频率较高的条件下,减少损耗,提升并网逆变器的效率,具有十分重要的意义。本文首先分析了逆变器的单相拓扑结构和三相拓扑结构,在此基础上,分别采用正弦脉宽调制技术(SPWM)以及空间矢量调制技术(SVPWM)两种调制策略,建立了逆变器的损耗计算模型,给出了三相并网逆变器系统的开关损耗、导通损耗和滤波电路损耗的计算方法,分析了提高逆变器转换效率的途径。利用MATLAB/SIMULINK建立了逆变器的损耗仿真模型,比较了两种调制策略对逆变器效率的影响。搭建了实验平台,分别对两种调制策略进行了效率测量,验证了理论分析与仿真结果的有效性。 【英文摘要】In photovoltaic power generation system, the conversion efficiency of the grid-connected inverter is a very important indicator. It has great significance to reduce the losses and enhance the efficiency of grid-connected inverter under the conditions of high switching frequencyBased on the analyzes of the topology structure for the single-phase inverter and three-phase inverter, the loss calculation models of the inverter are established using sinusoidal pulse width modulation (SPWM) and space vector modulation (SVPWM) strategies respectively. The lose calculation methods of the three-phase grid-connected inverter are given, include switching losses, conduction losses and filter circuit losses. The ways to improve the conversion efficiency of the inverter are also analyzed.The inverter simulation model of the loss is established using MATLAB/SIMULINK, and the influence on inverter efficiency of two modulation strategies is compared.An experimental platform is build, the efficiency using two modulation strategies is measured respectively. The results demonstrate the validity of theoretical analysis and the simulation result. 【目录】太阳能三相并网逆变器的效率研究 摘要 3-4 Abstract 4 第一章 绪论 7-20 1.1 光伏并网逆变器简介 7-9 1.1.1 光伏技术国内外发展现状 7-8 1.1.2 光伏并网逆变器的发展趋势 8-9 1.2 光伏并网逆变器的拓扑结构 9-13 1.2.1 逆变器的单相拓扑结构 11-12 1.2.2 光伏并网逆变器的三相拓扑结构 12-13 1.3 光伏并网逆变器效率提升技术国内外研究现状 13-18 1.3.1 改进拓扑结构 14-16 1.3.2 新型功率开关器件 16-17 1.3.3 调制策略的改进 17-18 1.4 本文的主要研究内容及章节安排 18-20 第二章 逆变器两种调制策略