An improved grid connected PV generation inverter control system

Abstract

We are going to study the operational principle and the structure of the present grid-connected photovoltaic system. It describes the two inverter control methods. a) voltage source inverter control method b) power type PWM inverter control method On the basis of above two kinds of inverter control methods, we will present an improved PWM inverter control system that can be applied in grid-connected PV generation and uses MATLAB/Simulink software to simulate and analyze. The result of the simulation shows that the improved inverter control system can effectively control the grid current waveform which tends to sine wave, meanwhile it can achieve the maximum power point tracking, besides it is able to put the arbitrary power out to the load or to the grid, while the control system has a good stability.