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:
Nov. 16, 2004
Filed:
Apr. 18, 2003
Satoshi Tanaka, Takasago, JP;
Mitsubishi Heavy Industries, Ltd., Tokyo, JP;
Abstract
An operation control apparatus and an operation control method for a single-shaft combined plant are provided. A clutch is engaged and disengaged, whereby a gas turbine (power generator) is connected to and disconnected from a steam turbine. The opening of IGV is controlled by an opening command, the opening of a burner bypass valve is controlled by another opening command, and the openings of fuel flow control valves are controlled by other opening commands found based on a pilot ratio. The commands to the IGV and the burner bypass valve and the pilot ratio are found during an isolated operation in which only the gas turbine is operated, during a joint operation in which the gas turbine and the steam turbine are both operated, during a transition from the isolated operation to the joint operation, and during a transition from the joint operation to the isolated operation. Thus, the pilot ratio and the fuel-air ratio of the gas turbine are optimized according to the state of operation, so that whether the clutch is disengaged or engaged, the combustion state of the gas turbine is stabilized.