Single-phase synchronverter for residential PV power systems

摘要

Distributed energy sources, mainly from renewable energy, have been increasingly applied to commercial facilities and residences. The power control of the various distributed sources is a fundamental task and is being studied in several recent papers. Among the current works many have explained the use the so called synchronverter control strategy to regulate the active and reactive power flow for three-phase distributed generators. Nevertheless, none of them have addressed a proposal for single-phase synchronverter power systems. In this paper, a brief review of synchronverters is presented. Thereupon, it is proposed a single-phase synchronverter for residential distributed generators, such as photovoltaic power system. The proposed single-phase model is based on the conventional structure of the three-phase control model. Simulation results are shown in order to validate the single-phase synchronverter, including evaluating performance in the presence of power quality issues, such as voltage sag and grid harmonic distortion, in both grid-connected and islanded mode.