Operation DVR based Modular Multilevel Cascade Converter Based on Double-Star Chopper-Cells (MMCC-DSCC) for Compensation Voltage Sag and Swell in Power Distribution Grids

Today power quality issues related to electric power distribution companies are one of major concerns. In this paper, compensation voltage sag/swell by Dynamic Voltage Restorer (DVR) based on Modular Multilevel Cascade Converter - Double Star Chopper Cell (MMCC-DSCC) has been studied and simulated. The proposed half-bridge inverter six cells in each phase is composed The output voltage of the inverter line to level was thirteen, so very low harmonic content of using a very small LC filter output sinusoidal voltage quality can be found. To extract the switching pattern of the phase shift multi-carrier modulation (PSHM) is used. Performance DVR at Voltage sag/swell multilevel inverter (MMCC-DSCC) structure-based DVR and DVR based two-level inverters have been compared. The results of simulation software MATLAB / SIMULINK shows a properly functioning system.