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:
Apr. 12, 1994
Filed:
Jun. 28, 1990
Jens Kure-Jensen, Schenectady, NY (US);
William I Rowen, Schenectady, NY (US);
James H Moore, Schenectady, NY (US);
General Electric Company, Schenectady, NY (US);
Abstract
A system and method for anticipating and controlling overspeed in a combined cycle turbine of the type having a gas turbine with a fuel flow control valve and a steam turbine with at least one steam control valve both disposed on a single shaft and having a heat recovery steam generator heated by said gas turbine and connected to supply steam to the steam control valve, the combined cycle turbine having a unified control system and driving a load. Below a preselected shaft speed the gas turbine fuel command signal controls power. Above the preselected shaft speed the steam turbine speed signal also controls power. Anticipation of overspeed under severe transient load changes, such as loss of electrical load, is provided by a power load unbalance system, wherein gas turbine power and steam turbine power responsive signals are summed after proportionately scaled power responsive signals exceed load by a preselected amount, whereby appropriate action is taken to reduce power before significant overspeed can occur.