光伏发电系统中最大功率跟踪的研究

讨论了并网太阳能光伏发电系统最大功率跟踪问题-提出了实现最大功率跟踪的方法,并且比较了四种方法优缺点。在分析光伏电池伏安特性的基础上,提出扰动观察法的实现算法,通过比较前后两次功率的大小来决定光伏电池电压扰动的方向,使光伏电池最终达到最大功率点。文章利用Matlab的S-函数构建了光伏电池的仿真模型,实验结果表明,该算法可有效跟踪光伏电池最大功率点,适用于光伏并网逆变系统。

The Research for MPPT Method of Photovoltaic Power System

This article discusses maximum power point tracking of the on-grid solar photovoltaic power system, the four kinds of methods of MPPT and comparison between the four kinds of methods were discussed. When the Volt-ampere characteristic of the PV battery is analyzed, a realization method of the perturbation and observation algorithm is proposed, by comparing the former and latter powers, the voltage perturbation direction is decided and the PV battery reaches the maxim power point ultimately. The simulation model of a photovoltaic cell is established using a Matlab/s-function, the experimental results show that this algorithm can track the maximum power point effectively and applies to the PV inverting system.