Matrix Converter-Based Unified Power-Flow Controllers: Advanced Direct Power Control Method

• Published in: IEEE transactions on power delivery Vol. 26; no. 1; pp. 420 - 430
• Main Authors: Monteiro, J, Silva, J F, Pinto, S F, Palma, J
• Format: Journal Article
• Language: English
• Published: New York, NY IEEE 01.01.2011; Institute of Electrical and Electronics Engineers; The Institute of Electrical and Electronics Engineers, Inc. (IEEE)
• Subjects: Active control; Applied sciences; Controllers; Convertors; Direct current networks; Direct energy conversion and energy accumulation; Direct power control (DPC); Dynamics; Electric converters; Electrical engineering. Electrical power engineering; Electrical machines; Electrical power engineering; Electricity distribution; Energy accumulation; Exact sciences and technology; matrix converter (MC); Matrix converters; Power control; Power networks and lines; Power reliability; Power system dynamics; Pulse duration modulation; Reactive power; Regulation and control; Steady-state; Studies; Transmission line matrix methods; unified power-flow controller (UPFC); Electric energy transportation; Sliding mode; Matrix convertors; Direct method; Reactive power control; Reactive power; Switching conditions; unified power-flow controller (UPFC); Energy conversion; Power losses; Dynamic model; Cost lowering; Dynamic response; Direct digital control; Control system; Unified power flow controller; Direct current line; Power electronics; Experimental study; Steady state; Direct power control (DPC); matrix converter (MC); Power control; Three phase convertor; Reliability; Energy storage
• ISSN: 0885-8977; 1937-4208
• DOI: 10.1109/TPWRD.2010.2055897

This paper presents a direct power control (DPC) for three-phase matrix converters operating as unified power flow controllers (UPFCs). Matrix converters (MCs) allow the direct ac/ac power conversion without dc energy storage links; therefore, the MC-based UPFC (MC-UPFC) has reduced volume and cost, reduced capacitor power losses, together with higher reliability. Theoretical principles of direct power control (DPC) based on sliding mode control techniques are established for an MC-UPFC dynamic model including the input filter. As a result, line active and reactive power, together with ac supply reactive power, can be directly controlled by selecting an appropriate matrix converter switching state guaranteeing good steady-state and dynamic responses. Experimental results of DPC controllers for MC-UPFC show decoupled active and reactive power control, zero steady-state tracking error, and fast response times. Compared to an MC-UPFC using active and reactive power linear controllers based on a modified Venturini high-frequency PWM modulator, the experimental results of the advanced DPC-MC guarantee faster responses without overshoot and no steady-state error, presenting no cross-coupling in dynamic and steady-state responses.