Modelling of DC Microgrid for Fault Analysis

Microgrids have become a global trending topic such that there is a plethora of research undergoing in different aspects that include operations like energy management, stability, protection and control. A DC microgrid has done a revolution in the power distribution network and it improves power reliability and quality. Also, DC microgrids have significant benefits over the AC grid in terms of size, price, and efficiency, thereby becoming a preferred network for modern power systems. However, there are no design guidelines or standard models to study the DC microgrid. In this paper, a DC microgrid has been modelled with renewable sources, distributed loads, and an AC grid. The proposed system is modelled using MATLAB/Simulink software platform. Additionally, the work also emphasizes the design and operational features of a DC microgrid, including an investigation of fault characteristics for low resistance faults, high resistance faults and faults at different locations of the DC microgrid.