Photovoltaic Micro Grid Inverter Control Method

Due to the increasing depletion of fossil fuels, and with a strong environmental pollution problems, all countries need to find a new clean energy to replace fossil energy, advantage of solar energy is clean without pollution and energy almost endless aroused widespread concern and particular to the light energy into electrical energy is very earnest, now countries the new photovoltaic inverter system began to pay attention to and the planning into all kinds national planning. The photovoltaic industry in our country has a large proportion in the world, but the application of the product has not kept up with the development of photovoltaic industry. This paper will mainly on how to improve the efficiency of inverter system, make the new research direction control inverter system better and better.This paper designs the three-phase grid connected inverter system for a small power First analyzes the principle of photovoltaic cells and on the basis of analysis of sever common max power tracking, and proposed a new MPPT control method and the simulation proves the new feasibility. From the simulation results to see tracing method model than traditional MPPT of method is faster and the stability of the disadvantage of large shocks. Secondly, establish the mathematical model of three-phase inverter system, analyzes the basic method to realize the SVPWM control method, and the simulation experiments. Then the main circuit and auxiliary circuit of the system will design in detail, and the main parameters of the choice of devices is introduced. Finally,each of the control program to do a design, briefly introduces the software flow chart of the system.The final design of a miniature three-phase grid connected inverter, the output for the three-phase alternating current, the experimental results prove the feasibility of the system.