Open-Loop Control of Modular Multilevel Converters Using Estimation of Stored Energy
2011 (English)In: IEEE transactions on industry applications, ISSN 0093-9994, E-ISSN 1939-9367, Vol. 47, no 6, 2516-2524 p.Article in journal (Refereed) Published
The internal control of a modular multilevel converter aims to equalize and stabilize the submodule capacitor voltages independent of the loading conditions. It has been shown that a submodule selection mechanism, included in the modulator, can provide voltage sharing inside the converter arm. Several procedures for controlling the total stored energy in each converter arm exist. A new approach is described in this paper. It is based on estimation of the stored energy in the arms by combining the converter electromotive force reference, the measured alternating output current, and the known direct voltage. No feedback controllers are used. Experimental verification on a three-phase 10 kVA prototype is presented along with the description of the new procedure.
Place, publisher, year, edition, pages
2011. Vol. 47, no 6, 2516-2524 p.
Terms—Energy balance, modular multilevel converter (M2C), modulation, open-loop control, prototype.
Electrical Engineering, Electronic Engineering, Information Engineering
Research subject SRA - Energy
IdentifiersURN: urn:nbn:se:kth:diva-48801DOI: 10.1109/TIA.2011.2168593ISI: 000297343800024ScopusID: 2-s2.0-82055172549OAI: oai:DiVA.org:kth-48801DiVA: diva2:458576
QC 201111282011-11-232011-11-232014-12-01Bibliographically approved