Study On Optimization Of MPPT In Photovoltaic Power System

Solar energy is one of the cleanest,most abundant renewable energy that humanpossess,Solar’s great use of space has attracted various countries gave vigorous supportto the photovoltaic industry,photovoltaic industry become one of the fastest growingindustries in the world. as an overview of photovoltaic power generation system,itsobjective is raising efficiency of photovoltaic power generation,and carry out a researchand optimization of the maximum power point tracking (MPPT) of photovoltaic powergeneration system.First of all,this paper set up a new photovoltaic battery universal model,whichprovides the convenience for photovoltaic cell in the future study.Then introduce thecomponents of the photovoltaic power generation system,and mainly discusses thestructure characteristics of the grid and off-grid system.The last,article on disturbanceobservation method and incremental conductance method both traditional controlalgorithm conduct a research,and set up two algorithms respectively with different waysof modeling,and simulation analysis of the output;In view of the disturbanceobservation method and incremental conductance method in photovoltaic powergeneration systems on the maximum power point tracking (MPPT) defects,which is thetracking precision and response speed can not balance,the conventional PID controlalthough comparative superiority in the precision and speed,but due to its controlparameters can not adaptive setting,and photovoltaic cells output has nonlinearproperties,so the simple PID control is opposite for the system;Based on thischaracteristic,the fuzzy logic control method is put forward setting and optimization ofPID parameters,and the PID parameters is eliminated to set this defect adaptively and itimproves the robustness.With traditional tracing method of maximum power pointtracking simulation results comparison,fuzzy PID control is concluded,which canrealize fast and smooth tracking photovoltaic battery output power.