Prime-mover dynamo plants – Turbogenerators
Reexamination Certificate
2005-05-03
2005-05-03
Ponomarenko, Nicholas (Department: 2834)
Prime-mover dynamo plants
Turbogenerators
C290S052000, C290S047000, C290S046000, C290S041000, C322S010000, C322S011000, C322S029000, C322S032000
Reexamination Certificate
active
06888263
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.
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Ishihara Seiichi
Kataoka Tadashi
Kinoshita Noboru
McKelvey Terence
Ozawa Takahide
Ebara Corporation
Ebara Densan Ltd.
Mohandesi Iraj A.
Oblon & Spivak, McClelland, Maier & Neustadt P.C.
Ponomarenko Nicholas
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