An improved particle swarm optimization(PSO) algorithm of global maximum power point tracking(MPPT) is proposed.The parameters design,constraint conditions and executive process of traditional PSO algorithm are improved to implement the accurate tracking with maximum power point of photovoltaic array.Simulation and experiment are carried out for the single-stage photovoltaic grid-connected system.And the proposed control strategy is compared with traditional perturbation and observation method.The effectiveness of the proposed strategy is validated by the results.%通过对传统粒子群优化(PSO)算法的设计参数、约束条件及执行流程等方面进行优化,提出一种基于改进型PSO算法的全局最大功率点跟踪(MPPT)控制策略,该控制策略可准确跟踪光伏阵列最大功率点(MPP).以单级式光伏并网系统为研究对象对所提控制策略进行仿真和实验研究,并与传统扰动观察法进行比较,仿真和实验结果证明了所提控制策略的正确性.
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