基于单传感器的光伏系统MPPT算法研究  

Research of MPPT for photovoltaic system based on a single sensor

作　　者：施大发[1] 张澧生[1] 刘建林[1] 陈小青[2] 

机构地区：[1]湖南机电职业技术学院,湖南长沙410151 [2]湖南大学电气与信息工程学院,湖南长沙410082

出　　处：《电源技术》2012年第12期1847-1850,共4页Chinese Journal of Power Sources

基　　金：湖南省教育厅资助科研项目(11C0481);湖南省教育厅资助科研项目(12C1066)

摘　　要：最大功率点跟踪技术常被用于光伏发电系统,以获取最大功率输出。提出了一种基于变步长单电流传感器的光伏发电系统最大功率点跟踪技术。利用单电流传感器采集光伏电池的电流信息来控制boost变换器的占空比,实现光伏系统最大功率点跟踪的目的。在此基础上,引进了变步长寻优的控制方法,改善了系统的快速性与稳定性。该算法只需要一个传感器,简化了系统的控制结构,节约了系统成本。通过对仿真结果的对比分析,表明了本文所提算法的可行性和有效性。The maximum power point tracking （MPPT） technique is frequently applied to photovoltaic generation systems to obtain the maximum power output. A novel MPPT approach based on a single current sensor algorithm was proposed. First, the method of MPPT based on current sensor was used to measure the current value of the photovoltaic cell to control the boost converter duty in order to achieve the maximum power point tracking of photovoltaic cell. On this basis, a variable step size optimization control method was proposed to improve the rapidity and stability of the system. The algorithm needed only one sensor, which simplified the control structure and saved the cost of the system. The simulation results substantiated the strategy＇s feasibility and advantages.

关 键 词：最大功率点跟踪 单电流传感器 变步长 光伏系统 BOOST变换器 

分 类 号：TM914.4[电气工程—电力电子与电力传动]