A Generalized Parameter Tuning Method of Proportional-Resonant Controllers for Dynamic Voltage Restorers

Phuong Vu (Hanoi University of Science and Technology)
Ngoc Dinh (Hanoi University of Science and Technology)
Nam Hoang (Hanoi University of Science and Technology)
Quan Nguyen (The University of Texas at Austin)
Dich Nguyen (Hanoi University of Science and Technology)
Minh Tran (Hanoi University of Science and Technology)

International Journal of Power Electronics and Drive Systems (IJPEDS)
Vol 9, No 4: December 2018

Temporary voltage swells and sags appear with high frequency in electric power systems, and they significantly affect sensitive loads such as industrial manufacturing or communication devices. This paper presents a strategy to design proportional-resonant controllers for three full-bridge voltage-source converters with a common DC-link in dynamic voltage restorer systems. The proposed controllers allow the system to quickly overcome temporary unbalanced voltage sags. Simulation results carried out in MATLAB/Simulink and experimental results implemented in a Typhoon HIL402 device demonstrate the ability of the proposed design method. The results show that the system with the proposed controllers can ride-through single-phase or double-phase voltage sags up to 55% and three-phase voltage sags up to 70% in a duration less than one grid-voltage cycle.