Control and stability analysis of interfaced converter in distributed generation technology

Abstract

This paper proposes a control technique of an interfaced converter for the integration of Distributed Generation (DG) sources into the power grid. The proposed control technique provides compensation for the active, reactive, and harmonic current components of grid-connected loads. Proper switching functions of the interfaced converter have been defined based on passivity control theory by achieving space equations and suitable series damping injection. Comprehensive simulation results under steady-state and dynamic operating conditions are provided. The effectiveness of the proposed control technique is demonstrated and validated by injecting the maximum available power from DG sources to the power grid, correcting power factor (PF) between grid current and load voltage, generating a fixed voltage at the point of common coupling (PCC) and reducing total harmonic distortion (THD) of grid current.