Research On The Maximum Power Point Tracking Control Algorithm Of Photovoltaic Power System

As the scientific and economy developing,the problems,global fossil energy shortages along with its environmental pollution,is increasingly aggravating,it causes that the demands for green renewable energies grow are growing.As one of the various forms of new energies around the world,solar energy has gradually become one of main development directions to development of new energy of the world.Furthermore,photovoltaic cells,as the essential component of energy conversion,has number of crucial techniques deserved to study,in actual application.Among them,the problem of energy conversion inefficiency low of photovoltaic is need to solve agog,however,control arithmetic,Maximum Power Point Tracking(MPPT),can improve battery utilization.Firstly,the working principle and mathematical model of photovoltaic cells are described,according to the practical application,the engineering model of photovoltaic cell is established,analyze the output characteristics of photovoltaic cell under different conditions,analyze the working principle of boost chopper circuit.In order to make the photovoltaic cell operate stably at the MPP,then the working voltage of the circuit needs to change dynamically to work at the MPP.On the basis of the two-zone perturbation method and the improved variable order derivative increment method,this paper focuses on the working principle of disturbance observation method and conductance increment method.A zonal modified variable step conductance increment method is proposed to realize MPPT.Finally,in the case of multiple peaks,the tracking effect of the proposed partition modified variable step size INC is simulated,the results show that the improved algorithm can not find the global maximum power point under local shadow.Therefore,based on the principle of MPPT,combined with the foraging characteristics of E.coli,according to the change of bacteria swimming behavior,migration probability and adaptation value in the process of operation,MPPT was realized.The method of improving the operation direction of counter trend is introduced.Then verify the tracking effect of the improved algorithm under multi-peak conditions.Finally,through the comparison of MATLAB/Simulink simulation waveforms,it is shown that the district-modified variable-step conductance increment method can quickly and accurately realize MPPT in the case of single peak;In the case of multiple peaks,the improved bacterial foraging algorithm is used in photovoltaics.The search speed and accuracy of the GMPP in the power generation system have been greatly improved.Figure[46]Reference[82]...