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:
Jul. 28, 2015
Filed:
Jan. 10, 2012
Klaus-dieter Liedtke, Endingen, CH;
Mengbin Zhang, Otelfingen, CH;
Aysegul Kirecci, Baden, CH;
Ulf Schirmeister, Endingen, CH;
Klaus-Dieter Liedtke, Endingen, CH;
Mengbin Zhang, Otelfingen, CH;
Aysegul Kirecci, Baden, CH;
Ulf Schirmeister, Endingen, CH;
ALSTOM TECHNOLOGY LTD, Baden, CH;
Abstract
A method for operating a gas turbine includes supplying fuel via at least one control valve regulated using an open-loop control system based on a predetermined load setpoint value. A valve stroke control command (s) is generated based on a fuel mass flow control command (m) using a mass flow-valve stroke converter. The valve stroke control command (s) is compared with a valve stroke limit value (min{s, s}) using a variable pressure regulator. A load limit value is generated if the valve stroke control command (s) exceeds the valve stroke limit value (min{s, s}) to reduce the load setpoint value. Operation of the gas turbine is stabilized using a low limit value (x) of a pressure drop ratio (x), wherein the pressure drop ratio (x) is a quotient of a pressure drop (dp) which occurs at the control valve and of a pressure (p) upstream of the control valve.