Grid Integration of a Residential PV-based Hybrid Renewable Energy System Using High-Frequency Multi-winding Transformer

Abstract

In this paper, a topology of a residential hybrid renewable energy system based on a high-frequency multi-winding transformer is introduced and analyzed. The system includes a PV and a wind-turbine as renewable energy sources, a battery as energy storage and their energies are integrated through a high-frequency transformer. In fact, the transformer integrates the energies in a magnetic form and also isolates the system inputs and outputs. The integrated output from renewables and battery is a DC high-voltage and is transferred to a grid-connected inverter to supply the residential loads and also injected to the grid on request. A phase shift control technique is used to control the power flow between the sources, storage and loads. Detail of the control system is presented and also validated through experimental tests.