一种基于功率预测的光伏MPPT算法研究

MPPT效率是决定光伏逆变器发电量的核心因素,动态MPPT效率是衡量发电效率的关键指标。文章提出了一种基于功率预测的动态MPPT算法,该算法能够在光照、温度等环境因素变化的情况下,快速、精确地跟踪最大功率点,使逆变器始终工作在最大功率点处,有效解决三点法跟踪效率低的问题。最后搭建了光伏并网试验系统,验证了文中算法的正确性和高效性。

MPPT efficiency is the core factor that determines the power generation of photovoltaic inverter,and dynamic MPPT efficiency is the key index to measure the power generation efficiency.In this paper,a dynamic MPPT algorithm based on power prediction is proposed,which can track the maximum power point quickly and accurately under the change of envi-ronmental factors such as illumination and temperature,so that the inverter works at the maximum power point all the time,which effectively solves the problem of low tracking efficiency of the three-point method.Finally,a photovoltaic grid-connected test system is built to verify the correctness and efficiency of the algorithm.