The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Jun. 13, 2006
Filed:
Mar. 15, 2005
Motoyasu Satoh, Tokyo, JP;
Seiichi Ishihara, Tokyo, JP;
Noboru Kinoshita, Tokyo, JP;
Takahide Ozawa, Tokyo, JP;
Shao-jun Zheng, Tokyo, JP;
Terence Mckelvey, Tokyo, JP;
Tadashi Kataoka, Tokyo, JP;
Motoyasu Satoh, Tokyo, JP;
Seiichi Ishihara, Tokyo, JP;
Noboru Kinoshita, Tokyo, JP;
Takahide Ozawa, Tokyo, JP;
Shao-jun Zheng, Tokyo, JP;
Terence Mckelvey, Tokyo, JP;
Tadashi Kataoka, Tokyo, JP;
Ebara Corporation, Tokyo, JP;
Ebara Densan Ltd., Tokyo, JP;
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 () for converting alternating-current power generated by the generator into commercial alternating-current power, and a system-interconnection device () for interconnecting output of the inverter device to a commercial AC power supply system (). 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 () is provided for operating the permanent-magnet-type generator () 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.