This paper is devoted to the design and performance analysis of an Energy Management System (EMS) for a microgrid, focusing on the stabilization of the power network under variable loads. Energy Management Systems consist of solar, wind, and battery storage systems through which the energy is distributed effectively in different demand periods. The results presented in this paper demonstrate that the proposed EMS provides a stable voltage and frequency of the power network. In addition, it manages power production and distribution, and deals with all aspects of resources used to adopt the operational requirements and environmental changes. The simulation analysis proves the EMS to be feasible in terms of assuring the operation of sustainable energy systems in the microgrid at the highest performance and reliability rate.