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A new modulation method for the modular multilevel converter allowing fundamental switching frequency
KTH, Skolan för elektro- och systemteknik (EES). (Elektriska maskiner och effektelektronik)
KTH, Skolan för elektro- och systemteknik (EES). (Elektriska maskiner och effektelektronik)
KTH, Skolan för elektro- och systemteknik (EES). ABB, Sweden. (Elektriska maskiner och effektelektronik)ORCID-id: 0000-0002-8565-4753
KTH, Skolan för elektro- och systemteknik (EES). (Elektriska maskiner och effektelektronik)ORCID-id: 0000-0002-1755-1365
2011 (engelsk)Inngår i: IEEE 8th International Conference on Power Electronics and ECCE Asia (ICPE & ECCE), 2011: 'Green World with Power Electronics' / [ed] IEEE, IEEE , 2011, s. 991-998Konferansepaper, Publicerat paper (Fagfellevurdert)
Abstract [en]

This paper presents a new modulation method for the modular multilevel converter. The proposed method is based on a fixed pulse pattern where harmonic elimination methods can be applied. Modulation methods with harmonic elimination based on calculated pulse patterns have been presented for other multilevel topologies. However, similar modulation schemes have not yet been presented for the modular multilevel topology. In the proposed modulation method, the pulse pattern is chosen in such a way that the stored energy in each submodule remains stable. It is shown that this can be done at the fundamental switching frequency without measuring the capacitor voltages or using any other form of feedback control. Such a modulation scheme has not been presented before. The theoretical results are verified by both simulations and experimental results. The simulation results show successful operation at the fundamental switching frequency with a larger number of submodules. When a smaller number of submodules are used, harmonic elimination methods may be applied. This is verified experimentally on a converter with eight submodules per phase leg. The experimental results verify that stable operation can be maintained at the fundamental switching frequency while successfully eliminating the fifth harmonic in the ac-side voltage.

sted, utgiver, år, opplag, sider
IEEE , 2011. s. 991-998
Emneord [en]
Harmonic analysis, Power electronics, Switching frequency, Topology
HSV kategori
Forskningsprogram
SRA - Energi
Identifikatorer
URN: urn:nbn:se:kth:diva-40604DOI: 10.1109/ICPE.2011.5944672Scopus ID: 2-s2.0-80052087118ISBN: 978-161284956-0 (tryckt)OAI: oai:DiVA.org:kth-40604DiVA, id: diva2:441655
Konferanse
ICPE 2011
Forskningsfinansiär
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Merknad

QC 20110930

Tilgjengelig fra: 2011-09-17 Laget: 2011-09-17 Sist oppdatert: 2016-04-27bibliografisk kontrollert

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