Research on Partial Shading of Photovoltaic MPPT Based on PSO-GWO Algorithm
许爱华 1王智煜 1贾皓天 1袁文俊1
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作者信息
1. 东北石油大学电气信息工程学院,黑龙江大庆 163318
折叠
摘要
针对在局部阴影条件下,光伏阵列的功率-电压特性曲线呈现多个峰值,传统群体智能优化存在收敛速度慢、振荡幅度大和易陷入局部最优等问题,提出一种基于PSO-GWO(Particle Swarm Optimization-Grey Wolf Optimization)算法的MPPT(Maximum Power Point Tracking)控制方法.该算法引入余弦规律变化的收敛因子,平衡GWO算法的全局搜索与局部搜索能力;引入PSO算法,提高灰狼个体与自身经验之间的信息交流.仿真结果表明,提出的PSO-GWO算法在局部阴影条件下不仅能快速收敛,而且功率输出震荡幅度更小,有效提升了局部遮阴条件下光伏阵列的最大功率跟踪效率和精度.
Abstract
Under local shading conditions,the power-voltage characteristic curves of photovoltaic arrays show multiple peaks,and traditional population intelligence optimization suffers from slow convergence,large oscillation amplitude and the tendency to fall into local optimality.To address the above problems,an MPPT(Maximum Power Point Tracking)control method based on the PSO-GWO(Particle Swarm Optimization-Grey Wolf Optimization)algorithm is proposed.The algorithm introduces a convergence factor that varies with the cosine law to balance the global search and local search ability of the GWO algorithm;the PSOalgorithm is introduced to improve the information exchange between individual grey wolves and their own experience.Simulation results show that the proposed PSO-GWO algorithm not only converges quickly under local shading conditions,but also has a smaller power output oscillation amplitude,effectively improving the maximum power tracking efficiency and accuracy of the PV(Photovoltaic)array under local shading conditions.
关键词
最大功率点追踪/灰狼算法/粒子群算法/局部阴影
Key words
maximum power tracking/grey wolf algorithm/particle swarm algorithm/partial shadow
维普
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