M. Karimian - Electrical Engineering Department, Iran University of Science and Technology, Tehran, Iran
A. Jalilian - Electrical Engineering Department, Iran University of Science and Technology, Tehran, Iran
H Hosseini - Electrical Engineering Department, Iran University of Science and Technology, Tehran, Iran

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.

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