基于改进莱维飞行粒子群算法的光伏系统MPPT方法

MPPT of PV arrays based on a new LFPSO algorithm

在光伏发电系统的MPPT控制中,标准粒子群算法存在跟踪精度不高,易收敛于局部极值点的问题。为了提升MPPT的准确度,引入了改进的莱维飞行粒子群算法(LFPSO),优化了算法流程及收敛条件,提升了算法的准确度,并减少了莱维飞行过程所需的额外控制时间。通过仿真表明:新算法能够显著提高跟踪的精确度,可以很好地收敛到全局最优点。

In the MPPT control of PV system, the standard PSO control method has the problem of low tracking accuracy and easy convergence to local extremum points.In order to improve the accuracy,the improved Levy Flight Particle Swarm Optimization （LFPSO） is introduced to optimize the algorithm flow and convergence conditions, which improves the accuracy of the algorithm and reduces the extra control time required for Levy Flight.The simu- lation shows that the new algorithm can significantly improve the accuracy of tracking,which can well converge to the global optimum.