A Protection Scheme for Fault Detection, Location and Isolation in DC Ring Microgrid

In this article, centralized protection system is developed for DC microgrid (DCMG). The novelty of the proposed protection algorithm is not only based on the combination of different fault location but also depends on the characterization of the faults. The protection system was developed based on the monitoring of voltages and currents at different locations within DCMG. On the basis of fault detection criteria, protective measures are initiated and appropriate switching signals are sent to the appropriate Solid State Circuit Breaker (SSCB) in order to isolate the faulty section. The 96V DCMG having ring configuration and its schemes for protection are simulated using MATLAB/Simulink environment. Simulation results shows that the proposed method works satisfactory in identifying fault in DCMG.