Reduction of the input current harmonic content in matrixconverters under input/output unbalance
Casadei, D.; Serra, G.; Tani, A.
Industrial Electronics, IEEE Transactions on
Volume 45, Issue 3, Jun 1998 Page(s):401 - 411
Digital Object Identifier 10.1109/41.678998
Summary:This paper deals with the performance evaluation of
space-vector-modulated matrix power converters under input and output
unbalanced conditions. Two control strategies of the input current
displacement angle are presented and compared in order to emphasize
their influence on the input current harmonic content. The first is
based on keeping the input current vector in phase with the input
voltage vector. In the second, the input current displacement angle is
dynamically modulated as a function of positive- and negative-sequence
components of the input voltages. In both cases, the harmonic content
and the three-phase RMS value of the input current have been evaluated
analytically. The input current harmonic spectrum is quite different for
the two control strategies and can be related to the input and output
unbalance. It has been verified that, in the usual case of balanced
output conditions, using the second method, it is possible to eliminate
the harmonic components of the input current. Some numerical simulations
are presented to confirm the analytical results
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