基于matlab光伏发电系统的MPPT控制与仿真

结合光伏电池常用的等效电路和太阳能电池的数学模型,基于Matlab/Simulink建立了光伏电池的仿真模型,得到光伏电池的P-U曲线,并对仿真结果进行了分析。与传统的光伏电池模型相比,本文考虑了环境温度与电池温度之间的关系,使得光伏电池的仿真结果能反映实际环境与电池温度的变化;提出了改进扰动观察的最大功率点跟踪(MPPT)控制方法,并建立了带有MPPT控制功能的光伏发电系统仿真模型,仿真结果表明,该系统能较好地实现最大功率点的跟踪,提高了光伏电池的发电效率。

Control and Simulation of Photovoltaic Generation System MPPT Based on Matlab

The aim of the paper is to establish the photovoltaic cell simulation model based on Matlab/Simulink and to determine whether photovoltaic power generation system can exhibit maximum power point tracking.The mathematical models of the equivalent circuit and photovoltaic cell(PV) were set up which were generally used in photovoltaic cells and I-U and P-U curve of the photovoltaic cell were obtained with the photovoltaic simulation models based on Matlab/Simulink.Unlike the conventional models of photovoltaic cell,these models took into the consideration of the relationship between the ambient temperature and the battery temperature which could reflect temperature changes of the actual environment,as well as that of the battery.In this paper the control method of the maximum power point tracking(MPPT)was proposed under disturbance and observation and a simulation model of the photovoltaic power generation system with the MPPT control function was established.The simulation results showed that this system was able to achieve the maximum power point tracking and to improve power generation efficiency of photovoltaic cells.