초록 ▼

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 int

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.

대표청구항 ▼

The invention claimed is: 1. A gas turbine generating apparatus comprising: a gas turbine capable of a high-speed operation; a permanent-magnet-type generator driven by said gas turbine at a high speed; an inverter device for converting alternating-current power generated by said permanent magnet t

The invention claimed is: 1. A gas turbine generating apparatus comprising: a gas turbine capable of a high-speed operation; a permanent-magnet-type generator driven by said gas turbine at a high speed; an inverter device for converting alternating-current power generated by said permanent magnet type generator into commercial alternating-current power; and a control device for operating said permanent-magnet-type generator as a motor at a time of starting said gas turbine, and supplying alternating-current power from a direct-current power supply through said inverter device or another inverter device in addition to said inverter device to said permanent magnet type generator for increasing a rotational speed smoothly from zero; wherein said control device detects output current of said inverter device and controls said inverter device to keep the output current constant by supplying a rated current of said permanent magnet type generator constantly to said permanent magnet type generator. 2. A gas turbine generating apparatus according to claim 1, wherein said control device increases an output frequency of said inverter device from zero to a predetermined frequency within a short period of time when said gas turbine is started. 3. A gas turbine generating apparatus according to claim 1, wherein said direct-current power supply used to start said gas turbine comprises a storage battery. 4. A gas turbine generating apparatus according to claim 1, wherein said direct-current power supply used to start said gas turbine is produced by rectifying alternating-current power of a commercial AC power supply system.