Repetitive Control Scheme for a Dynamic Voltage Restorer DVR for Power Quality Improvement Using SVM

This paper discusses a controller based on a repetitive control for a dynamic voltage restorer (DVR). It contains a feedforward term to improve transient response and a feedback term of repetitive control to achieve zero steady-state error of tracking sinusoidal signal. This controller can compensate power quality disturbances, such as voltage sag, harmonic voltages, and voltage imbalance, simultaneously. The control scheme is implemented in a test system with MATLAB/SIMULINK software. Simulation results show that the output voltage of controller can track the reference signal accurately and therefore compensate disturbances.

Keywords:

Dynamic Voltage Restorer (DVR) , Harmonic Distortion , Repetitive Control , Voltage Sag