Analysis of repetitive control of grid connected inverter

This paper presents an analytical review of the repetitive control (RC) of micro grid inverter. In grid connected inverter the focus is on current controlling rather than voltage controlling. A plant is developed in Simulink to show the effect of different control techniques. In this model, a DC to AC converter is connected to the grid source with odd harmonics. To sink the output of converter with grid, an LCL filter has been used. For controlling, two different techniques; Classical Control and RC have been analyzed. The goal of such converter is to minimize the error between periodic reference and output current in the presence of periodic disturbances. Reduction in phase shift is also required to improve the power factor. The analysis also includes the effect of different gains on the total harmonic distortion and the steady state error.