智能电网中光伏发电MPPT仿真分析

Simulation Analysis on Photovoltaic Generation with MPPT in Smart Grid

根据光伏阵列的数学模型搭建了多功能光伏阵列仿真模块,为进一步对光伏阵列最大功率跟踪方法的分析与研究打下了基础。针对传统最大功率跟踪方法的振荡与跟踪速度之间的矛盾以及误判问题,提出了基于变步长的改进MPPT算法,并通过仿真实例验证了该方法的准确性和优越性。

New energy power generation is an essential part of smart grid, and PV generation is one of the main forms of the new energy generation. In order to give full play to the efficiency of photovoltaic cell, photovoltaic generation device should be of maximum power tracking function. Firstly, this article gives the multifunctional photovoltaic array simulation module based on the mathematical model of photovoltaic array structures, which is a basis for the further analysis and research. Secondly, the traditional maximum power tracking method has two problems. One is the contradiction between tracking speed and oscillation, the other is maximum power point misjudgment, so this paper puts forward the improved MPPT algorithm based on variable step-size, and proves the accuracy and superiority of the method through the simulation example.