Dc voltage balance control for three-level npc power...

Details Dc voltage balance control for three-level npc power... Dc voltage balance control for three-level npc power...

H - Electricity

02

M

H02M 7/68 (2006.01) H02M 1/08 (2006.01) H02M 7/797 (2006.01)

Patent

CA 2543023

Three-level inverter and rectifier power conversion systems and space vector modulation (SVM) controls having even-order harmonic elimination for neutral voltage balancing with a predefined vector switching sequences for half-wave symmetry in open loop system operation. The vector sequence listings for each SVM diagram segment includes switching state entries individually indicating one of three possible switching state levels positive (P), zero (0), or negative (N) for each of three or more switching groups of the power conversion system, with listings for each pair of first and second diametrically opposite diagram segments include symmetrically opposite switching states, with positive levels in the entries of the listing for the first segment corresponding to negative levels in the entries of the listing for the second segment and vice versa.

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