Energy Management Scheme for Renewable Energy Source based DC Microgrid with Energy Storage

Abstract

Renewable Energies such as solar, wind, fuel cell etc. need to be utilized effectively and efficiently to reduce the carbon foot prints to fulfil the energy demand deficit. The intermittence nature of these energy resources affects energy balance and power quality significantly. Renewable energy resources throw the challenge on the system operator for utilizing the available energy to fulfil the energy demand requirement. However, this paper investigates the power flow management in DC Micro-Grid. The proposed scheme effectively regulates the dc bus voltage and balancing the power flow in the system under all operating scenario and curtail load during the deficit of power. The scheme considers the load category i.e. essential and non-essential load. In support to the energy management scheme, the test condition considers Maximum Power Point Tracking (MPPT) condition and battery State of Charge (SoC) and converter control strategies to regulate the DC bus voltage. The test system of 48V, 300W DC Microgrid system is simulated in MATLAB/Simulink environment and results are studied considering different various conditions.