Oblon, McClelland, Maier & Neustadt, L.L.P.
Power conversion device
A power conversion device performs power conversion between three-phase AC, and DC, and includes a positive arm and a negative arm for each phase, each of which includes one or more converter cells connected in series. A voltage command generating unit in a control device includes an AC current control unit, a circulating current control unit, and a command distributing unit, and generates a positive arm voltage command and a negative arm voltage command for each phase. In the circulating current control unit, a compensator calculates a first control command so that circulating current for each phase approaches a circulating current command value, a suppression unit generates a second control command so as to suppress a 2f component and a 4f component contained in the first control command, and then the first control command and the second control command are combined to generate a circulation control command.
TOSHIBA MITSUBISHI-ELECTRIC INDUSTRIAL SYSTEMS CORPORATION Mitsubishi Electric Corporation
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Shinzo Sadao Osamu Miwako Yasuhiko Kaho Kotaro Toshiyuki
Tamai Funahashi Mori Tanaka Hosokawa Mukunoki Higashi Fujii