A Global Maximum Power Point Tracking Control Method For Photovoltaic Power Generation

The maximum power point tracking(MPPT)is a key technology in solar power generation system to improve power generation efficiency.The research of MPPT technology and its application have a deep significance in theoretical and application.This paper introduces the working mechanism,classification,components,equivalent circuit of solar cells and its mathematical model.Based on the analysis of mathematical model and using Matlab / Simulink to simulate the output characteristic of solar cel s.By reading many excel ent papers in the area of PV system,the paper described global maximum power point tracking(GMPPT)technology under the multiple peak situation,specifically,introducing the five more representative kinds of GMPPT method,described its advantages and disadvantages,presenting their algorithm flowchart,and Comparing this list of several methods.Study the basic principles of the standard particle swarm algorithm,running processes,design processes,advantages and disadvantages,parameter settings,as well as a simple comparison with other optimization algorithms,etc.,then an adaptive particle swarm algorithm was proposed,the inertia weight,acceleration factor,and optimization adaptive particle improvements compared to the standard particle swarm algorithm.Finally,four basic test functions was proposed to verify the performance of the algorithm,the results show that the optimal value of the adaptive algorithm in tracking accuracy and convergence rate is better than the standard particle swarm algorithm optimization.Using the novel adaptive particle swarm optimization in the process of global maximum power point tracking.Introducing the specific implementation steps and the design process.Through a series of simulations,the accuracy,speed and stability of the algorithms were demonstrated.Then the simulation model of solar power system using Matlab / Simulink was proposed,the whole system including the PV array,adaptive PSO-GMPPT module,PWM pulse signal modules and DC / DC converter module,and the simulation experiments was processed,and the power waveform curve was given,then effectiveness and feasibility of the algorithms was proved.It can came to the conclusion that the proposed novel algorithm used in solar power systems in the global maximum power point tracking has a high convergence speed,high precision and high stability.