Analysis of on- and off-line optimized predictive current controllers for PWM converter systems

• Published in: IEEE transactions on power electronics Vol. 6; no. 3; pp. 451 - 462
• Main Authors: Kolar, J.W., Ertl, H., Zach, F.C.
• Format: Journal Article
• Language: English
• Published: New York, NY IEEE 01.07.1991; Institute of Electrical and Electronics Engineers
• Subjects: AC machines; Analog-digital conversion; Applied sciences; Counting circuits; Current control; Electrical engineering. Electrical power engineering; Exact sciences and technology; Power electronics, power supplies; Power supplies; Pulse width modulation; Pulse width modulation converters; Pulsed power supplies; Switching frequency; Voltage; Inverter; Sequencer; System realization; Control system; Static convertor; State space; Optimization; Current control; Synchronous; Vector control; System representation; Pulse duration modulation; Vector; Hysteresis; Predictive control
• ISSN: 0885-8993; 1941-0107
• DOI: 10.1109/63.85913

The problem of on-off current control for coupling of a DC voltage system with a three-phase (polyphase) AC voltage system via a pulsewidth modulated (PWM) converter is discussed. The AC voltage represents either the counter EMF (electromotive force) of an AC machine or the three-phase power supply system (mains). The following control concepts are investigated by digital computer simulation: a simple hysteresis controller; a predictive controller with online optimization (optimization with respect to minimum switching frequency); and a controller based on offline optimization (using a switching table). It is shown that the relatively involved predictive controller can be replaced by a switching table of very limited size. For rating of the treated controllers the switching frequency as a function of the RMS voltage of the AC system and the other system parameters is used.< >