Current controller considering harmonics compensation for grid connected converter in DPGS applications

This paper deals with the design and implementation of PR current control method in the αβ stationary reference frame for the grid side converter in Distributed Power Generation Systems (DPGS) applications. The goals of this paper are to implement a control technique for the grid side inverter including a LC filter, a compensation technique for low-order harmonics and to examine the grid current harmonic content with and without harmonic compensation. A comparative study in terms of current harmonic distortion between two different values of PR proportional gain running in steady state condition is made. The analyzed structure was simulated with Simulink software, then implemented and tested in laboratory using a dSPACE setup. The parameters of the system can be set according to the used experimental setup to validate the simulation results.