Title :
Analysis and design of a linear control strategy for three-phase UPQCs
Author :
Sepúlveda, Cristian A. ; Espinoza, José R. ; Morán, Luis A. ; Ortega, Romeo
Author_Institution :
Dept. of Electr. Eng., Univ. de Concepcion, Conception, Chile
Abstract :
A linear control scheme applied to a UPQC which is based on back-to-back connected series and parallel compensators sharing a common DC link is presented. The topology combined with the proposed control strategy allows to compensate for utility disturbances such as flickers, sags and swells. It also provides reactive power and current harmonic compensation. As a result, the load operates under constant supply voltage while the utility at a given power factor. Additionally, taking advantage of the arbitrary load phase, an optimization algorithm permits to operate the topology at minimum power losses thus improving the overall system efficiency. Preliminary simulated results confirm the theoretical considerations.
Keywords :
compensation; electric current control; harmonic distortion; optimisation; power factor; power supply quality; power system control; power system harmonics; reactive power control; DC link; constant supply voltage; current harmonic compensation; flickers; linear control; optimization; parallel compensators; power factor; power losses; power system efficiency; reactive power compensation; sags; series compensators; swells; utility disturbances; Circuit topology; Control systems; Current supplies; Harmonic distortion; Load flow; Power electronics; Power quality; Power system harmonics; Reactive power; Voltage fluctuations;
Conference_Titel :
Industrial Electronics Society, 2004. IECON 2004. 30th Annual Conference of IEEE
Print_ISBN :
0-7803-8730-9
DOI :
10.1109/IECON.2004.1432300