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:
May. 18, 1976
Filed:
Aug. 08, 1974
Joel M Anderson, Ypsilanti, MI (US);
Kermit R Wescott, Wilmington, DE (US);
Milton M Hobbs, Springfield, PA (US);
Roy W Kiscaden, Springfield, PA (US);
Westinghouse Electric Corporation, Pittsburgh, PA (US);
Abstract
A combined cycle electric power plant includes gas and steam turbines and steam generators and a digital/analog control system. An automatic digital portion of the control system functions with temperature and other detectors to provide temperature limit control for the gas turbines through the fuel valve position controls provided therefor. A blade path temperature reference is generated as a function of combustor shell pressure during the startup and load modes of operation, and during the load mode of operation the blade path temperature reference is further generated with dependence on the actual turbine exhaust temperature. In particular, the turbine blade path temperature is allowed to rise under loading operation until it reaches a limit value defined by a predetermined combustor shell pressure characteristic curve. Thereafter, the blade path temperature reference is permitted to rise to a higher and final limit value which exists when the actual exhaust temperature equals a limit temperature value defined by another combustor shell pressure characteristic curve which is higher than the first curve.