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Switching function analysis of half- and full-bridge modular multi-level converters for HVDC applications

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Title Switching function analysis of half- and full-bridge modular multi-level converters for HVDC applications
 
Creator DEORE, SR
DARJI, PB
KULKARNI, AM
 
Subject HVDC power transmission
poles and towers
power conversion harmonics
switching convertors
switching functions
HVDC transmission
switching function analysis
half-bridge modular multilevel converters
full-bridge modular multilevel converters
harmonic content
arm voltages
arm currents
balanced switching conditions
harmonic components
pole voltages
sorting strategy
module voltage balancing
finite switching frequency
PERFORMANCE
 
Description This study presents a theoretical analysis of half- and full-bridge modular multi-level converters for HVDC transmission applications. The constraints and the degrees of freedom in the choice of switching functions, and the harmonic content of the sum and difference of arm voltages and currents, are highlighted by the analysis. The authors prove that under balanced switching conditions, dc and even harmonic components are absent from the difference variables and odd harmonics are absent from the sum variables, whereas the pole voltages are free from harmonics. Using an energy function approach, it is shown that the sorting strategy for module voltage balancing is stable and practically independent of the dynamics of the rest of the system. The module voltages settle down to a band around the average value because of the finite switching frequency, for which an upper bound is provided.
 
Publisher INST ENGINEERING TECHNOLOGY-IET
 
Date 2014-10-16T14:45:51Z
2014-10-16T14:45:51Z
2013
 
Type Article
 
Identifier IET GENERATION TRANSMISSION & DISTRIBUTION, 7(11)1344-1356
1751-8687
1751-8695
http://dx.doi.org/10.1049/iet-gtd.2012.0034
http://dspace.library.iitb.ac.in/jspui/handle/100/15819
 
Language en