H - Electricity – 02 – M
Patent
H - Electricity
02
M
321/23
H02M 5/44 (2006.01) H02M 7/48 (2006.01) H02M 7/515 (2006.01)
Patent
CA 1295668
ABSTRACT OF THE DISCLOSURE A power converter device including a plurality of self-commutated voltage type converters each connected to a common DC circuit. A plurality of transformers each having DC windings and AC windings are also provided. Each of the DC windings are connected to an AC output terminal of a respective one of the converters and each of the AC windings are connected in series. An AC switch is provided through which the serially connected AC windings of the transformers are connected to utility power systems. A capacitor is provided in the common DC circuit. A DC overvoltage suppression means is installed in the common DC circuit, and a current limiting device, wherein the capacitor in the common DC circuit is charged through the current limiting device before starting the self-commutated voltage type converters. The DC over- voltage suppression means is then connected to the common DC circuit and removed after the self-commutated voltage type converters are started. A method of starting the power converter device also forms part of the invention.
567905
Kabushiki Kaisha Toshiba
Ogilvy Renault Llp/s.e.n.c.r.l.,s.r.l.
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