Model predictive control with a fixed switching frequency for an AC-to-AC converter

Males Tomlinson, Toit Mouton, Ralph Kennel, Peter Stolze

Research output: Chapter in Book/Report/Conference proceedingConference contributionpeer-review

23 Scopus citations

Abstract

This paper discusses the control of an AC-to-AC converter that forms part of an 11 kV electronic voltage regulator. A novel finite-set model predictive control technique is presented to allow fixed frequency switching. A fixed switching period is defined and divided into smaller evaluation steps. The switching behaviour is obtained by using the analogy of PWM with a triangular carrier wave. During the first half of the switching period, the system may only switch from the on-state to the off-state and during the second half, only from the off-state to the on-state. To account for the repetitive nature of the switching waveform, an average receding horizon prediction method is introduced. An anticipated prediction is made by calculating the average value for one switching period ahead, according to the position and state in the current switching period. The method presented good practical results and proved to be effective in maintaining a fixed switching frequency.

Original languageEnglish
Title of host publicationProceedings - 2013 IEEE International Conference on Industrial Technology, ICIT 2013
Pages570-575
Number of pages6
DOIs
StatePublished - 2013
Event2013 IEEE International Conference on Industrial Technology, ICIT 2013 - Cape Town, South Africa
Duration: 25 Feb 201328 Feb 2013

Publication series

NameProceedings of the IEEE International Conference on Industrial Technology

Conference

Conference2013 IEEE International Conference on Industrial Technology, ICIT 2013
Country/TerritorySouth Africa
CityCape Town
Period25/02/1328/02/13

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