Analysis, Design and Control of a Unified Power-Quality Conditioner Based on a Current-Source Topology

• Published in: IEEE transactions on power delivery Vol. 27; no. 4; pp. 1727 - 1736
• Main Authors: Melin, P. E., Espinoza, J. R., Moran, L. A., Rodriguez, J. R., Cardenas, V. M., Baier, C. R., Munoz, J. A.
• Format: Journal Article
• Language: English
• Published: New York, NY IEEE 01.10.2012; Institute of Electrical and Electronics Engineers; The Institute of Electrical and Electronics Engineers, Inc. (IEEE)
• Subjects: Applied sciences; Capacitors; Compensation; Conditioning; Converters; Convertors; Current source converters; Current sources; Design engineering; Direct current; Disturbances. Regulation. Protection; Electric potential; Electrical engineering. Electrical power engineering; Electrical machines; Electrical power engineering; Exact sciences and technology; Harmonic analysis; Nonlinear control; Power electronics, power supplies; Power factor; Power networks and lines; power quality (PQ); Reactive power; Regulation and control; Shunt (electrical); Studies; unified power-quality conditioner (UPQC); Current source; Disturbance rejection; Prototype; nonlinear control; power quality (PQ); Current source converter; Flexible AC transmission systems; Control system; Non linear control; System design; Power electronics; unified power-quality conditioner (UPQC); Low frequency; Switching; Implementation; Voltage source converter; Charge compensation; Power control; Direct current; Quality control; Energy quality; Power factor; Service quality; Current source converters
• ISSN: 0885-8977; 1937-4208
• DOI: 10.1109/TPWRD.2012.2199524

This paper presents a three-phase unified power-quality conditioner based on current source converters (CSC-UPQC), including the design guidelines of the key components, an appropriate control scheme, and a selection procedure of the dc current level. Particularly, the ride through capability criterion is used to define a minimum dc current level so that the CSC-UPQC achieves the same characteristics as a UPQC based on voltage-source converters in terms of voltage disturbance compensation in the point of common coupling (PCC) and load power factor compensation. A 1.17 MVA load fed from a 3.3 kV system is used to show the proposed design procedure, and a laboratory prototype is implemented to show the system compensating sags and swells using low switching frequency in the CSC and maintaining a unitary displacement power factor in the PCC.