Full Utilization Control of Stored Energy in Lithium-Ion Batteries Based on Forecasted PV Output for HEMS

Renewable energy resources such as photovoltaic (PV) are crucial to counter an incoming energy crisis in the future. Nevertheless, when PV generators are integrated with storage batteries, a constructive mechanism needs to be structured in order to securely control the energy flow in the batteries during the charging/discharging process so that the risk of over-charge/over-discharge of the batteries can be prevented. Furthermore, it is extremely essential to implement a control method that is capable to fully utilize a stored energy in the scope of small-scale BESS to the load regularly in the first place before it is further scaled up to a mega-structure. In this study, an energy control scheme that considers and executes a next-day forecast of generation based on Grid Point Value as an input data has been proposed. Experimental equipment was structured and the system’s operation was completely administered by an RX621 microcontroller. Good experimental results were obtained corresponding to the trend of simulation results.