Gas turbine generating apparatus

Electricity: single generator systems – With physical starting and/or stopping of the generator – Connecting and/or disconnecting generator and driving means

Reexamination Certificate

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Details

C322S010000, C322S014000, C322S032000, C322S029000

Reexamination Certificate

active

07061211

ABSTRACT:
A gas turbine generating apparatus according to the present invention comprises a gas turbine capable of a high-speed operation, a permanent-magnet-type generator driven at a high speed by the gas turbine, an inverter device (5) for converting alternating-current power generated by the generator into commercial alternating-current power, and a system-interconnection device (9) for interconnecting output of the inverter device to a commercial AC power supply system (10). The system-interconnection device controls the inverter device based on voltage of the commercial AC power supply system as a criterion such that output current of the inverter device is in phase with the voltage or out of phase with the voltage by a constant phase difference. A control device (18) is provided for operating the permanent-magnet-type generator (4) as a motor at a time of starting the gas turbine, and supplying alternating-current power from a direct-current power supply through the inverter device or another inverter device in addition to the inverter device to the generator for increasing a rotational speed smoothly from zero. The control device detects output current of the inverter device and controls the inverter device to keep the output current constant.

REFERENCES:
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patent: 5493200 (1996-02-01), Rozman et al.
patent: 6410992 (2002-06-01), Wall et al.
patent: 6495929 (2002-12-01), Bosley et al.
patent: 6605928 (2003-08-01), Gupta et al.
patent: 0963035 (1999-12-01), None
patent: 10-191699 (1998-07-01), None
patent: 11-285260 (1999-10-01), None

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