针对漂浮式光伏电站最大功率追踪的研究

Research on maximum power tracking for floating PV power station

设计了一种针对漂浮式光伏电站最大功率追踪的算法。当光照一定的情况下,浮体在海浪作用下摆动,可以等效为光伏电站在短时间内受到不均匀光照。通过对多浮体摆动情况下光伏电站受到不均匀光照的Simulink仿真,发现光伏电站的P-U特性曲线呈现出“曲线整体保持增长,存在局部峰值,达到全局峰值开始下降”的规律。在标准萤火虫算法基础上融合了最小惩罚法、联赛选择算子和变步长算法,对光伏阵列进行最大功率追踪。结果表明,改进萤火虫算法在快速准确地进行最大功率追踪的同时不会陷入局部最大值点。

An algorithm of maximum power tracking for floating PV power station was designed.When the illumination is constant,the floating body swings under the action of the waves,which can be equivalent to the PV power station receiving uneven illumination in a short time.Through the Simulink simulation of the uneven illumination of the PV power station under the condition of multi-floating body swing,it's found that the P-U characteristic curve of the PV power station exhibits the law of"the curve as a whole keeps growing,reaching the global peak and starting to fall,but there are local peaks".Based on the standard firefly algorithm,the minimum penalty method,the league selection operator and the variable step were combined to track the maximize power point of PV array.The results show that the improved firefly algorithm does not fall into the local maximum point while performing fast and accurate maximum power tracking.