Energy Management Strategy for Dc Micro-grid System With an Important Penetration of Renewable Energy

Abstract

This paper presents an energy management strategy using stateflow controller related to DC micro-grids with an important penetration of renewable energy. The increase in world electricity demand is one of the principal drivers of the exhaustion of fossil fuels and expanded greenhouse gas emissions. To solve these problems, several countries have adopted actions for large renewable energy deployment, which includes wind energy, solar power, biomass power, tidal, and hydropower. These sources are considered as significant in delivering clean energy and reducing greenhouse gas emissions for sustainable improvement. In such a case, these are referred to as distributed generation systems. Distributed generation can impact negatively on the performance of the distribution network as the distribution network will no longer operate with a unidirectional power flow pattern. To address these issues, micro-grids are being used as a platform to integrate distributed generation systems, as they provide significant benefits to end-users and to the distribution network. The objective of this paper was to implement an energy management system to ensure the proper operation of the developed DC microgrid and this was developed using Simulink blocks available in the MATLAB/Simulink software. The simulation results shown that this control strategy is unconditionally reliable to ensure proper operation of the microgrid systems. Moreover, the developed algorithm model presents another advantage, which enables the users to access and to change any control parameters within the DC microgrid. By comparing these results with the literature, the developed energy management algorithm provides safety and automatic control of the microgrid.