Capacitance minimization in modular multilevel converters: Using model predictive control to inject optimal circulating currents and zero-sequence voltage

C. D. Townsend, R. Aguilera, P. Acuna, G. Konstantinou, J. Pou, G. Mirzaeva, G. C. Goodwin

Research output: Chapter in Book/Conference paperConference paper

11 Citations (Scopus)

Abstract

The superior harmonic performance of the modular multilevel converter facilitates reduction in passive filtering requirements. However, in practice, any volume and weight reduction brought about by using smaller filtering components, is offset by the increase in stored capacitor energy inside the converter. This paper proposes injection of high-frequency circulating currents and zero-sequence voltages, that significantly reduce capacitor voltage ripple. This can ultimately facilitate use of smaller capacitances. Optimal reference voltages and currents are designed off-line, with a model predictive control scheme used to track the references on-line while also compensating for any disturbances introduced by the practical system.

Original languageEnglish
Title of host publication2016 IEEE 2nd Annual Southern Power Electronics Conference, SPEC 2016
PublisherIEEE, Institute of Electrical and Electronics Engineers
Number of pages6
ISBN (Electronic)9781509015467
DOIs
Publication statusPublished - 1 Jan 2016
Externally publishedYes
Event2nd IEEE Annual Southern Power Electronics Conference, SPEC 2016 - Auckland, New Zealand
Duration: 5 Dec 20168 Dec 2016

Conference

Conference2nd IEEE Annual Southern Power Electronics Conference, SPEC 2016
CountryNew Zealand
CityAuckland
Period5/12/168/12/16

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