基于串联型DC module的光伏发电系统研究  

Research on a Photovoltaic Generation System Based on Series-Connected DC Modules

作　　者：张琦[1] 孙向东[1] 钟彦儒[1] 吴迎丰[1] 张凯[1] 

机构地区：[1]西安理工大学自动化与信息工程学院,陕西西安710048

出　　处：《西安理工大学学报》2009年第4期410-414,共5页Journal of Xi'an University of Technology

摘　　要：提出了一种基于串联型直流功率单元(DC module)电路的光伏发电系统,讨论了采用单端反激变换器实现的DC module电路。由于反激变换器用于升压变换时变压器原边电流较大,当并联使用时效率较低,为了减小DC module电路升压压力,提高每组变换器能量传输效率,采用串联形式的DC module电路,且每组DC module电路使用独立的最大功率追踪算法,由此组成的光伏发电系统提高了DC module电路的升压效率,且可以实现每块光伏电池板的最大功率点跟踪,解决了不同光照(阴影)、不同规格以及不同朝向等因素引起的失配问题。实验结果表明,当一路或多路电路中的电池板受到阴影影响时,各路电池板在控制器的作用下仍然工作在各自的最大功率点处。A photovoltaic generation system based on series-connected is proposed,and a DC-module circuit composed of a flyback converter is discussed in this paper.There would be less efficiency if the DC modules are parallel-connected to form DC bus voltage,so series-connected DC modules are discussed in order to improve the efficiency of each converter.The maximum power point track per photovoltaic（PV） panel is realized and the mismatch problem caused by different irradiances（shading）,specifications and orientations is also solved in the photovoltaic generation system including the DC modules.The experimental results indicate that each module works in its own maximum power point under unbalance irradiation.

关 键 词：直流功率单元 单端反激变换器 光伏发电系统 

分 类 号：TM46[电气工程—电器]