Title :
Repetitive control for a dynamic voltage restorer for power-quality improvement
Author :
Roncero-Sanchez, Pedro ; Acha, Enrique ; Ortega-Calderon, J.E. ; Batlle, V. Feliu ; Garcia-Cerrada, Aurelio
Author_Institution :
Sch. of Ind. Eng., Univ. of Castilla-La Mancha, Ciudad Real, Spain
Abstract :
This paper presents a control system based on a repetitive controller to compensate key power-quality disturbances, namely voltage sags, harmonic voltages and voltage imbalances, using a dynamic voltage restorer (DVR). The control scheme deals with all three disturbances simultaneously within a specified bandwidth. The control structure contains a feed-forward term to improve the transient response and a feedback term to ensure zero error in steady-state. PSCAD/EMTDC has been used to carry out all modelling aspects of the repetitive controller and test system. Simulation results show that the control approach performs effectively and yields excellent voltage regulation. Further work is required towards a digital implementation of the controller.
Keywords :
feedforward; power supply quality; voltage control; PSCAD-EMTDC; dynamic voltage restorer; feedforward term; harmonic voltages; power quality improvement; repetitive control; transient response; voltage imbalances; voltage regulation; voltage sags; Bandwidth; Control systems; Feedback; Feedforward systems; Power quality; Power system harmonics; Power system restoration; Transient response; Voltage control; Voltage fluctuations; DVR; Power Quality; VSC; Voltage Sag Compensators;
Conference_Titel :
Power Electronics and Applications, 2009. EPE '09. 13th European Conference on
Conference_Location :
Barcelona
Print_ISBN :
978-1-4244-4432-8
Electronic_ISBN :
978-90-75815-13-9
