Control system for power conversion system

Details Control system for power conversion system Control system for power conversion system

1998-02-03

1998-12-29

Nguyen, Matthew

Electric power conversion systems

Current conversion

Having plural converters for single conversion

363 96, H02H 324

Patent

active

058547436

ABSTRACT:
A control system for a power conversion system composed of a plurality of unit converters and a transformer for connecting AC outputs of the unit converters in series. The control system includes a unit for detecting an AC system voltage at the primary winding of the transformer, a unit for generating a command voltage vector of a voltage output from the power conversion system at the primary winding of the transformer based on the AC system voltage, and an actual voltage vector selecting unit for preparing a plurality of actual voltage vectors of voltages output from the power conversion system at the primary winding of the transformer, and selecting one of them as a selected actual voltage vector. The control system further includes a unit converter voltage vector determining unit for determining a plurality of unit converter voltage vectors based on the selected actual voltage vector, a unit for generating a plurality of ON-OFF pattern signals for the self-turn-off devices, each determined by one of the unit converter voltage vectors, respectively, and a unit for generating gate pulses to the self-turn-off devices of the unit converters based on the ON-OFF pattern signals.

REFERENCES:
patent: 5257180 (1993-10-01), Sashida et al.
patent: 5355297 (1994-10-01), Kawabata et al.
patent: 5552977 (1996-09-01), Xu et al.
patent: 5737206 (1998-04-01), Yamamoto

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