Stability Analysis Of A Grid Connected Microgrid Under Numerous Fault Conditions Based On Centralized Digital-Controlled HESS

This work is presenting the dynamic stability analysis of a Grid connected Microgrid with controlled Hybrid Energy Storage System (HESS) with a digitally operated centralized P-Q and V-f control mechanism to maintain system stability in terms of Voltage, Frequency and Power at the common coupling lump. Both Internal and External fault conditions have been considered at base loading condition of the microgrid. A worst fault (L-L-G) has been considered with the common L-G fault both in the main grid and load side and the role of HESS in holding the system stability has been studied. A difference between the behaviors of HESS has been studied by considering the Base Load condition. The simulation of the system with various conditions is analyzed and presented for the proposed operating philosophy and the role of Hybrid Energy Storage System (ESS) in maintaining the steadiness is also verified.