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Tolerance-band modulation methods for modular multilevel converters
KTH, Skolan för elektro- och systemteknik (EES), Elektrisk energiomvandling. (High Power Electronics)ORCID-id: 0000-0001-8788-0415
KTH, Skolan för elektro- och systemteknik (EES), Elektrisk energiomvandling. (High Power Electronics)
KTH, Skolan för elektro- och systemteknik (EES), Elektrisk energiomvandling. (High Power Electronics)ORCID-id: 0000-0002-8565-4753
KTH, Skolan för elektro- och systemteknik (EES), Elektrisk energiomvandling. (High Power Electronics)
Vise andre og tillknytning
2013 (engelsk)Konferansepaper, Publicerat paper (Fagfellevurdert)
Abstract [en]

Modular multilevel converters (M2C) are increasingly used in high voltage direct current (HVDC) systems. The efficiency of M2Cs is highly related to the modulation method which determines the switching frequency and capacitor voltage ripple in the converter station. A new approach to modulation of M2C is presented in this paper. Tolerance-band methods are employed to obtain switching instants, and also cell selection. The proposed methods overcome the modulation problem for converters with few numbers of cells and also reduce the sorting efforts for cell balancing purposes while maintaining the cell-capacitor voltage limits. The evaluation is done by time-domain simulation by which the performance of each method is studied in both steady-state and transient cases. It is observed that using tolerance band methods not only reduces the switching frequency but also allows for handling severe fault cases in a grid connected system. Use of this method can reduce the switching losses and also allow for reduction of the cell capacitor size.

sted, utgiver, år, opplag, sider
IEEE , 2013. s. 1-10
Emneord [en]
Capacitors;Modulation;Sorting;Switches;Switching frequency;Voltage control;HVDC;High voltage power converters;Switching losses;Voltage Source Converter (VSC)
HSV kategori
Forskningsprogram
SRA - Energi
Identifikatorer
URN: urn:nbn:se:kth:diva-134878DOI: 10.1109/EPE.2013.6632010Scopus ID: 2-s2.0-84890192796OAI: oai:DiVA.org:kth-134878DiVA, id: diva2:668811
Konferanse
15th European Conference on Power Electronics and Applications (EPE), 2013
Forskningsfinansiär
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Merknad

QC 20140129

Tilgjengelig fra: 2013-12-02 Laget: 2013-12-01 Sist oppdatert: 2016-02-25bibliografisk kontrollert

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Hassanpoor, ArmanNorrga, StaffanNee, Hans-Peter

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