A Photovoltaic-Grid Integrated System for the Residential Power Management

Abstract

This paper proposes a photovoltaic (PV)-Utility integrated system with inductive power transfer (IPT) for electric vehicle (EV) charging applications in residential management applications. To realize this objective, a buck boost-interleaved H-bridge (BBIHB) configuration is proposed to integrate the PV source with the DC link of the front end converter (FEC) while achieving maximum power from the PV and power delivery to the IPT simultaneously. The DC bus of the IPT in the proposed system is obtained through the additive connection of the PV and FEC DC-link, which results in inherent boost of the DC bus voltage for the IPT system thus enhances the transmission power for the EV charging. Furthermore, the FEC allows bidirectional power flow between the utility and BBIHB converter by sharing the deficient or excess power in the system based on PV power availability. The complete modeling of the system and a control algorithm to achieve the above mentioned objectives is presented in this paper. Other features of the proposed system include inherent voltage boosting, a simple control strategy, and the absence of a separate converter for the PV to extract maximum power. Finally, an experimental hardware setup is developed in the laboratory and tested up to 4 kW of output power to validate the proposed system's performance, achieving a maximum DC-to-DC efficiency of 94% at this condition.