Abstract
Decreasing cost of solar PV systems have resulted in a rapid uptake of residential rooftop Photovoltaic (PV) systems across the globe. However, recent policy changes in Australia is incentivizing residential customers to install battery energy storage systems (BESSs) for effective utilization of their solar sources. This paper proposes an improved dynamic programming (DP) based home energy management (HEM) unit for grid connected residential PV systems equipped with BESSs. The proposed HEM scheme aims to minimize daily cost of electricity for residential customers by efficiently scheduling and managing PV-BESS systems. The impact of BESS degradation also included in the energy management model. Furthermore, flexible and constrained operation strategies of BESSs are proposed and the scheduling of PV-BESS systems is investigated for three different electricity price mechanisms such as constant, time of use (TOU) and dynamic tariffs in view of FIT rates available for new and old solar customers. The proposed HEM scheme will help residential customers compare the profitability of their installed PV-BESS systems under different price structures. Hourly simulations using PV generation and different load data are used to verify the effectiveness of the proposed HEM unit.
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