基于改进型扰动观察法的光伏阵列MPPT方法研究  

Research on photovoltaic array MPPT method based on improved perturbation and observation

作　　者：冯涛[1] 陈华[1] 

机构地区：[1]新疆大学电气工程学院,新疆乌鲁木齐830047

出　　处：《电源技术》2013年第8期1402-1405,共4页Chinese Journal of Power Sources

摘　　要：在分析光伏电池数学模型和输出特性的基础上,提出了一种固定电压法与改进的自适应步长占空比直接控制法相结合的方法。该方法应用固定电压法与自适应步长的扰动观察法相结合跟踪光伏阵列的最大功率点,在变化的环境条件下,使用MATLAB软件对这种自适应步长的跟踪方法进行仿真。仿真结果表明,所提方法能够快捷、准确地跟踪到光伏阵列的最大功率点,具有较好的控制精度,减少了在最大功率点振荡的能量损失,从而提高了光伏发电系统的能量转换效率。Based on the analysis of the mathematical model and the output characteristics of the photovoltaic cells, a new method of combining constant voltage method with adaptive duty cycle controlling method was proposed. Aiming at the maximum power point tracking （MPPT）, combining constant voltage method with adaptive duty cycle P＆O algorithm were applied in tracking photovoltaic arrays maximum power point. Under changing environmental circumstances, by using the MATLAB software, simulating, training and testing the neural network, the results showed： the proposed method tracks the MPP exactly and quickly, has better control precision and improves the energy conversion efficiency of PV generation system by reducing the output power oscillation around MPP.

关 键 词：光伏阵列 最大功率点跟踪 固定电压法 自适应步长 扰动观察法 

分 类 号：TM914[电气工程—电力电子与电力传动]