Method and apparatus for reducing harmonics mains-power-supply p

Details Method and apparatus for reducing harmonics mains-power-supply p Method and apparatus for reducing harmonics mains-power-supply p

1997-05-23

1999-03-30

Wong, Peter S.

Electric power conversion systems

Current conversion

With means to introduce or eliminate frequency components

363 39, 363 71, H02M 112, H02M 102

Patent

active

058896627

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.

REFERENCES:
patent: 4264951 (1981-04-01), Konishi et al.
patent: 4317166 (1982-02-01), Winkler et al.
patent: 5065303 (1991-11-01), Nguyen et al.
patent: 5155672 (1992-10-01), Brown

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