Gas turbine control system having partial hood control
AssigneeWestinghouse Electric Corp.
InventorPaul J. Tyler
Life of this patent
Estimating the term…
Abstract
Method and apparatus for controlling fuel flow in a combustion turbine, wherein a speed reference signal is given and wherein an actual speed signal is given, is shown to include a fuel flow regulator for regulating the flow of fuel in response to a control signal, a controller for generating a control signal representative of the difference between the actual speed signal and the speed reference signal, a first adjustment member for modifying the speed reference signal to account for droop prior to generation of the control signal, and a second adjustment means for modifying the speed reference signal to account for speed error also prior to generating the control signal. A load condition specifically envisioned for use with the present invention is the point of closure of the generator breaker.
Claims21
Apparatus for controlling fuel flow in a combustion turbine, wherein a speed reference signal is given and wherein an actual speed signal is given, said apparatus comprising,
- fuel flow means for regulating the flow of fuel in said combustion turbine in response to a control signal;
- controller means for generating a control signal representative of the difference between said actual speed signal and said speed reference signal and for providing said control signal to said fuel flow means;
- first adjustment means for modifying said speed reference signal to account for droop prior to generating said control signal, said first adjustment signal representative of droop and first subtraction means for determining an adjusted speed reference signal by subtracting the droop reference signal from said speed reference signal;
- second adjustment means for modifying said speed reference signal to account for speed error prior to generating said control signal, said second adjustment means comprising, error means for determining the error between said speed reference signal and said actual speed signal and second subtraction means for subtracting said error from said adjusted speed reference signal;
- and
- enabling means for enabling said first and second adjustment means on the occurrence of a prescribed event.
An electric power plant, comprising:
- a combustion turbine having a shaft, said combustion turbine being operative to turn said shaft in response to the combustion of fuel in said turbine and said combustion turbine having fuel flow means to regulate the flow of said fuel in response to a control signal;
- a generator connected to said shaft so that electric power is produced when said turbine shaft turns;
- first reference means for generating a speed reference signal and an actual speed signal;
- controller means for generating a control signal representative of the difference between said actual speed signal and said speed reference signal and for providing said control signal to said fuel flow means, said control means comprising a proportional integral differential controller.
- first adjustment means for modifying said speed reference signal to account for droop prior to generating said control signal;
- and
- second adjustment means for modifying said speed reference signal to account for speed error prior to generating said control signal.
Apparatus for controlling fuel flow in a combustion turbine, wherein a speed reference signal is given and wherein an actual speed signal is given, and wherein a device is provided for regulating the flow of fuel in said combustion turbine in response to a control signal, said apparatus comprising:
- controller means for generating a control signal representative of the difference between the actual speed signal and the speed reference signal and for providing said control signal to said fuel flow device, said control means comprising a proportional integral differential controller;
- first adjustment means for modifying the speed reference signal to account for droop prior to generating said control signal;
- and
- second adjustment means for modifying the speed reference signal to account for speed error prior to generating the control signal.
A method for controlling fuel flow in a combustion turbine, wherein a speed reference signal is given and wherein an actual speed signal is given, said method comprising the steps of;
- regulating the flow of fuel in the combustion turbine in response to a control signal;
- generating a control signal representative of the difference between said actual speed signal and said speed reference signal and providing said control signal to said fuel flow means, wherein the generation of said control signal is achieved by a proportional integral differential control method;
- modifying the speed reference signal to account for droop prior to generating the control signals;
- and
- modifying the speed reference signal to account for speed error prior to generating the control signal.
Dependencies are inferred from the claim text.