基于改进型动态阻抗匹配的MPPT控制算法研究

摘要

In order to improve the maximum output power of photovoltaic power generation system,an improved equivalent impedance matching maximum power point tracking(MPPT) algorithm is proposed based on output characteristics and mathematical model of photovoltaic cells.Through the method of mathematical and Matlab model simulation,the MPPT performance of photovoltaic array is analyzed,and the experimental platform is built to verify the performance of system.The research results show that the improved equivalent impedance matching method has a faster tracking speed and a good control precision,and makes the whole system more excellent robustness to its parameters.%为能有效提高光伏发电系统的最大输出功率,根据光伏电池的输出特性和数学模型,提出了一种改进型等效阻抗匹配最大功率点跟踪(MPPT)算法.该算法通过数学推导设计了扰动控制器,使系统参数具有自适应调节能力,能对系统阻抗进行精确匹配.通过数学建模和Matlab模型仿真的方法,对光伏阵列的MPPT性能进行分析,并搭建实验平台进行实验验证.研究结果表明,改进型等效阻抗匹配法具有更快的追踪速度及良好的控制精度,并使整个系统在自身参数的设置方面体现出更加优异的鲁棒性.