Current Control of Three-Phase Rectifier Systems Using Three Independent Current Controllers

• Published in: IEEE transactions on power electronics Vol. 28; no. 8; pp. 3988 - 4000
• Main Authors: Hartmann, M., Ertl, H., Kolar, J. W.
• Format: Journal Article
• Language: English
• Published: New York, NY IEEE 01.08.2013; Institute of Electrical and Electronics Engineers; The Institute of Electrical and Electronics Engineers, Inc. (IEEE)
• Subjects: Applied sciences; Circuit properties; Connection and protection apparatus; Control systems; Controllers; Cross coupling; Current control; Diodes; Electric currents; Electric, optical and optoelectronic circuits; Electrical engineering. Electrical power engineering; Electrical machines; Electrical power engineering; Electronic circuits; Electronics; Exact sciences and technology; MOSFETs; Phase current; power factor correction; Power networks and lines; Power supply; Pulse width modulation; Rectifiers; Regulation and control; Simulation; Switches; Switching, multiplexing, switched capacity circuits; Theorems; three-phase ac/dc converter; Transformations; Users connections and in door installation; Vectors; Voltage control; Transfer matrix; Rectifier; Multivariable control; Delta circuit; three-phase ac/dc converter; Rectifying circuits; Control system; Independent component analysis; Power factor correction; Connection; Control synthesis; d q Frame; Alternative continuous converter; Experimental study; Three phase current; Rotating frame; Current control; Three phase circuit; Power factor regulation; System simulation; Selector switch; Inward current; Alternating current
• ISSN: 0885-8993; 1941-0107
• DOI: 10.1109/TPEL.2012.2231946

Three-phase rectifier systems without connection of the neutral wire are characterized by the coupling of the phase input currents. Considering these couplings requires a transformation of the system equations into a static αβ-frame or into the rotating dq -reference frame where instead of the three coupled phase currents two independent current components are controlled. In this paper, it is shown that, despite of the existing cross-couplings, three independent phase current controllers can be used to control the system. Thereto, the cross coupling elements of the system transfer matrix have to fulfill some requirements which are derived using the Gershgorin theorem. The three-phase Δ-switch rectifier circuit is used for analysis and a detailed model of the rectifier system is derived where the cross couplings are visible. The model is subsequently used to evaluate the cross couplings and three independent current controllers are designed. Simulation and experimental results verify the control approach using three independent current controller for three-phase rectifier systems.