Abstract
This paper adopts a proposed energy management controller in a micro grid. This micro grid integrates both a renewable energy source and energy storage systems. Photovoltaic (PV) is adopted as a main power source, a valve regulated lead acid battery, and Super-capacitor are the energy storage system. This hybrid energy storage integrates the advantages of a high energy density of the battery and a high power density of the super-capacitor to decrease the stress on the battery and to decrease the voltage change at transient conditions. The proposed controller consists of two control units. The First unit is used for maximum power point tracking (MPPT), and the Second is used to drive the bidirectional converters for charging and discharging modes of the battery and the super capacitor; according to the load demand and the environmental conditions. The simulation results show the effectiveness and the efficiency of the proposed control strategy.
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