Multi level DVR with Energy Storage System for Power Quality Improvement

Abstract

In this Paper, DVR of different voltage injection schemes is used to mitigate Sag, Swell and compensate Harmonics. The Reference Voltage signals are generated by SRF theory and unit vector template generation is used to estimate the load voltages. The performance of DVR is compared when BESS and Capacitor are used as source for the VSC. The power quality issues such as Sag, Swell and Harmonics are compensated using Multi level Neutral Point Clamped inverter based DVR employing SPWM, SVPWM modulation techniques. In order to evaluate the performance of DVR, simulations are carried out using MATLAB/SIMULINK software.