Research And Realization Of Three-phase Photovoltaic Grid-connected Inverter With Reactive Power Compensation

With the increasing consumption of energy and the environment is getting poor and poor in the whole world.The solar energy as a renewable resource,the most widely distributed,and the most clean energy,has drawn great attention of the countries,and have launched new development measures,solar energy has become the most potential new industries.In recent years,the solar photovoltaic(Photovoltaie,PV)power generation has achieved great development,photovoltaic(PV)grid power generation has become one of the main methods for human to use solar energy.So further the study of solar power generation technology,especially the three-phase grid can be full of meaning to alleviate of lack of energy and economic sustainable development,and also mean a lot to the protection of environment.This article from the main components of photovoltaic inverter and the structure characteristics of three-phase electric grid,according to the mathematical model and theoretical basis of the two,this paper introduces the basic control method based on photovoltaic inverter and developments.And control of maximum power point of pv inverter is analyzed and the algorithm was improved,the simulation method is proposed and the we have done related experiments.The main work are as follows:At present commonly used photovoltaic inverter topology analysis,we design a parallel interleaving flyback active clamp topology based photovoltaic three-phase grid system.Research on control algorithm of maximum power point of pv po'wer generation system,enables the solar energy always to run in the form of maximum efficiency.When the inverter for the three-phase electricity output,through the analysis of space vector algorithm and improved algorithm,put forward the method and the simulation and related experiments,based on Matlab/Simulink environment simulation system model is established.The island detection module and reactive power compensation is analyzed.Finally,the paper completed which has the function of reactive compensation of three-phase photovoltaic inverter experiments,the hardware mainly includes control circuit,drive circuit,sampling circuit,protection circuit,and the software are created under CCS5.4.Through the test of the whole system,gives a practical waveform and data,and summarizes the corresponding conclusion.