Hybrid Energy Management System Employing Hysteresis Control for DC Microgrid

With the continuous rise in global energy demand, there is an increasing focus on fossil fuel exploration. However, these energy sources are neither sustainable nor environmentally friendly. The depletion of fossil fuel reserves and their harmful impact on the environment have led to a shift toward Renewable Energy Sources (RES) such as solar and wind power. Combining these sources results in a Solar-Wind Hybrid Power System (SWHPS), which maximizes the benefits of both energy types. Proper utilization of these renewable resources is essential to reduce reliance on conventional power generation methods and ensure a sustainable energy supply. This work introduces a closed-loop quadratic boost converter-based DC microgrid that integrates renewable energy sources, energy storage systems, and different types of loads. The proposed control system is designed to maintain power balance and grid stability, even under variable environmental conditions and fluctuating loads, where certain power sources may not be fully controllable. A comparative evaluation is conducted between an open-loop DC microgrid system under disturbances and a closed-loop DC microgrid (DC-MG) framework utilizing Proportional-Resonant (PR) and Hysteresis Control (HC) techniques. These systems are modeled and simulated using MATLAB/Simulink, and their performance is analyzed based on parameters such as settling time and steady-state error. The results indicate that the controlled DC microgrid system performs better in minimizing harmonic distortion and ensuring a rapid dynamic response.