Comparison of two current modulation strategies for matrixconverters under unbalanced input voltage conditions
Blaabjerg, F.
Casadei, D.
Klumpner, C.
Matteini, M.
Inst. of Energy Technol., Aalborg Univ.;
This paper appears in: Industrial Electronics, IEEE Transactions on
Publication Date: Apr 2002
Volume: 49,
Issue: 2
On page(s): 289-296
ISSN: 0278-0046
References Cited: 17
CODEN: ITIED6
INSPEC Accession Number: 7232975
Digital Object Identifier: 10.1109/41.993261
Current Version Published: 2002-08-07
Abstract
In this paper, the input current performance of matrix converters
is analyzed, especially with reference to the operating conditions
determined by unbalanced supply voltages. The space-vector modulation
(SVM) technique is utilized to calculate the duty cycles of the active
voltage vectors that must be applied, in each switching cycle period, in
order to satisfy the input and output requirements. A detailed
theoretical analysis of the input current harmonic content under
unbalanced input voltage conditions is presented for two different
current modulation strategies. On the basis of numerical simulations as
well as measurements on a laboratory prototype setup, the strategies'
performance are compared and the validity of the theoretical
investigation confirmed. It is concluded that, when the input voltages
are unbalanced to a significant extent, a dynamic input current
modulation strategy has to be preferred, since a lower harmonic line
current distortion will appear
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