全数字化控制光伏并网逆变器的设计与实现

作者：余运江1,2，杨波1，吴建德1，邓焰1 日期：2008-11-03/span> 浏览：3476 查看PDF文档

全数字化控制光伏并网逆变器的设计与实现

余运江1,2，杨波1，吴建德1，邓焰1
（1.浙江大学 电力电子研究所，浙江 杭州 310027;2.镇江船艇学院 工程系，江苏 镇江 212003）

摘要：逆变器作为光伏并网发电系统与电网接口的主要设备，其控制技术已成为研究的热点。简要介绍了光伏并网逆变器系统的结构和工作原理，重点分析了其并网工况的控制方案设计及其数字实现过程。最后，利用TMS320LF2407A型数字信号处理器（DSP）作为控制器，制作了1台1 kW的实验样机。仿真和实验结果表明，该设计方案实现了输出电流对电网电压的良好、实时跟踪。
关键词：正弦脉宽调制；并网逆变器；光伏；数字信号处理器；最大功率点跟踪
中图分类号：TM46文献标识码：A文章编号：1001-4551(2008)10-0006-04

Design and implementation of photovoltaic grid-connected inverter with digital control
YU Yun-jiang1,2, YANG Bo1, WU Jian-de1, DENG Yan1
(1.Power Electronics Research Institute, Zhejiang University, Hangzhou 310027, China;
2.Department of Engineering, Zhenjiang Watercraft College, Zhenjiang 212003, China)
Abstract: The inverters control technology becomes a research hotspot, because the inverter is a important equipment, which connects the photovoltaic grid-connected system and the grid. Firstly, the structure and the principle of the photovoltaic grid-connected system were introduced in brief, then the control scheme and its digital implementation were analyzed in detail. Finally, the digital signal processor(DSP) of TMS320LF2407A was adopted as the controller for the experimental prototype of 1 kW photovoltaic grid-connected inverter. Simulation and experimental results are done to verify the effectiveness of the proposed scheme.
Key words: sine pulse width modulation(SPWM); grid-connected inverter; photovoltaic; digital signal processor(DSP); maximum power point tracking(MPPT)