Renewable Energy Integration: Design of an Energy Management system using Battery Control

In today's modern world, energy system is the most important framework and a new energy revolution is evolving on a global platform for maintaining a reliable and sustainable energy supply. Integration of energy sources is one of the biggest challenges and also the biggest opportunity in this revolution. This challenge is due to the differences of various Renewable energy sources (RESs) based on the availability, weather conditions and many other factors. In this paper, modelling and control of a Solar/Wind/Small Hydro/Battery integrated system have been presented. All the systems have been integrated to form a DC-AC Integrated Renewable Energy System (IRES) to increase the system effectiveness. For coupling the AC and DC bus, bidirectional Converter is used and whole system has been attached to the control system designed for the battery, designed and developed with an objective to provide an uninterrupted power supply, reduce human errors, improve the power quality and lead to cost saving. The proposed system here presents the power-control strategies for grid-connected solar, wind and hydropower system providing resourceful power transfer. The system also acknowledges the maximum utilization of easily available RESs like photovoltaic energies. We have included battery storage system with fuzzy controller. The main work of the controller is the collection of data for the different RESs and schedule the power required by the load. The controller controls charging and discharging phenomenon of battery. The analysis and modeling have been done using MATLAB/SIMULINK environment. The validation for the proposed work is done by comparing the results to that of a PID controller-based battery control showing that fuzzy logic gives far better results in terms of all the aspects.