Method and apparatus for reducing harmonics mains-power-supply perturbations of a self-commutated multilevel inventor
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United States of America Patent
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Mar 30, 1999
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N/A
app pub date -
May 23, 1997
filing date -
Nov 23, 1994
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Abstract
A method and an apparatus for reducing harmonics mains-power-supply perturbations of a self-commutated multilevel inverter which is clocked at the fundamental frequency and has capacitive storage devices. On one hand, when a predetermined operating point of the multilevel inverter is left, angular values for turn-on and turn-off instants of individual voltage levels of the multilevel inverter are calculated for a newly determined operating point. On the other hand, a terminal voltage of the multilevel inverter is matched to an altered fundamental amplitude of the inverter output voltage. Consequently, the harmonics mains-power-supply perturbations of a multilevel inverter can be kept to a minimum at any time.
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