Scheduling of energy storage in a grid-connected PV/battery system via SIMPLORER

Grid connected photovoltaic (PV) systems are becoming increasingly attractive as a generation alternative due to new developments in technologies, environmental concerns and transmission congestion management. Usually the energy storage system is used to store the excess power generated during off-peak hours and to return it to the system when power from PV is not enough for the system or generation is more expensive. A real-time dynamic scheduling algorithm for energy storage in a PV/battery system based on the battery charge and discharge characteristics, and current and temperature dependence of the capacity of the battery is presented in this paper. The work aims to extend existing battery aware scheduling techniques. It differs from previous works as it takes into consideration many aspects of battery characteristics that were not considered previously. This allows better use of the battery bank and can prolong the battery service time. This paper also builds a simple PV/battery system in the SIMPLORER within VHDL (very high speed integrated circuit hardware description language) for realtime simulation.