DC-Microgrid Voltage Regulation using Dual Active Bridge based SVR

This work presents the series voltage regulator (SVR) for DC-microgrid. The SVR consists of two different types of power converters namely, dual active bridge (DAB) and followed by full-bridge dc-dc converter (FBDCC). DC-microgrid of five buses is considered with the nominal grid voltage of 380V. As transmission line length increases the drop in the line is also increases so it becomes necessity for some type of voltage control device that can compensate for this line voltage drop. The main goal of the SVR is to inject varying voltage in series with the microgrid for voltage regulation. This results the voltage level at different buses becomes independent of the load change and remains within the defined grid voltage limit. The system is modeled and simulated in MATLAB/Simulink environment. Simulation results show that the proposed SVR gives good dynamic performance and voltage regulation under different load conditions.