Patent ID: 7966802

Claim:
A gas turbine engine system comprising: an electrical generator configured to provide electrical energy to a load; a gas turbine engine comprising at least one combustor including a plurality of fuel injection points configured to receive a flow of fuel from a plurality of corresponding flow control devices; and a fuel control system comprising: a plurality of sensors positioned about the gas turbine engine system and configured to measure at least one parameter associated with the sensor; and a processor programmed to: receive a signal from at least one of the plurality of sensors indicative of a composition of the fuel; using the at least one fuel composition signal and a flow model that represents a water vapor content of the fuel to determine the physical properties of a fuel at an inlet to the flow control devices; determine a corresponding correction to a gas fuel flow gain using the determined physical properties; and automatically control fuel delivery and fuel split between the fuel injection points on the combustor using the determined flow gain to facilitate permitting a relatively large variation in the fuel composition for use in the gas turbine engine.