Recently DC Microgrids (DC-MGs) are more attractive and effective in renewable energy resources (RERs). In this paper, for the protection of devices and detecting parametric faults, two model-based fault detection strategies are presented for DC-MGs. The proposed strategies include a fault detection filter (FDF), named H_/H∞ based filter, and Kalman based filter. H_/H∞ based filter can minimize disturbance effects and maximize the fault effects on the so-called residual signal. The results of H_/H∞ based filter are compared with the Kalman based filter. Results show that the H_/H∞ based filter is more effective for detection of parametric faults in DC-MGs.
