一种小型风电机组的优化最大功率点跟踪控制算法

摘要

For improving the efficiency of small scale wind power generator, an optimize maximum power point tracking control algorithm was proposed, which determined the variable perturb step by the value of P-ω characteristic curve' s points slope.The searching speed and stability could be enhanced by fuzzy control.The output of generator could be presented by the simulation that included establishing the wind power simulation system and the model of this algorithm in MATLAB/Simulink.The results showed that this algorithm could improve the tracking speed, reduced the oscillation around the maximum power point and improved the efficiency of the small scale wind power generator.%为提高小型风机发电机组的风能转换效率,提出一种最大功率优化跟踪控制算法.以小型风力发电机组中发电机的P-ω特性曲线上各点斜率来确定占空比的扰动步长,通过模糊控制来对最大功率点进行跟踪,增强最大功率点搜索的快速性和稳定性.通过在MATLAB/Simulink仿真环境下搭建小型风电系统模型和优化最大功率点跟踪(MPPT)控制算法模型进行仿真,得出不同风速下发电机的输出功率仿真结果.结果表明:该控制算法能有效提高小型风电系统最大功率点的跟踪速度,减少最大功率点附近的振荡现象,提高小型风力发电机组的风能转换效率.