Control method and apparatus for a turbine generator
First Claim
1. A control apparatus for a turbine generator, comprising:
- priority selection means for selecting a high priority output component, a low priority output component, and a variable output component from output components including real power generated, power factor, and reactive power generated;
setpoint selection means for selecting a setpoint for said high priority component and said low priority component;
a generator rotor for producing a rotating magnetic field;
a field current controller for regulating field current in said generator rotor; and
turbine control means for controlling turbine horsepower, said turbine control means being responsive to said setpoint selection means and said priority selection means with respect to said real power generated output component.
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Accused Products
Abstract
A control method and apparatus for a gas turbine generator is disclosed having multiple modes of operation dependent on generator output components including real power generated, reactive power generated, and power factor. The apparatus provides for selecting a high priority output component, a low priority output component, and a variable output component. Depending on the priority selected, stator temperature is controlled with either a var limiter controller or a MW limiter controller. Rotor temperature is controlled by limiting excitation current substantially independently of priority selection. Setpoint selection may be variable and includes desired MW, MVAR'"'"'s, and Power factor. This invention allows control of the generator to produce the maximum MVAR'"'"'s the generator is capable of producing while at the same time utilizing the remainder of the gas turbine output capability for MW generation.
98 Citations
23 Claims
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1. A control apparatus for a turbine generator, comprising:
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priority selection means for selecting a high priority output component, a low priority output component, and a variable output component from output components including real power generated, power factor, and reactive power generated; setpoint selection means for selecting a setpoint for said high priority component and said low priority component; a generator rotor for producing a rotating magnetic field; a field current controller for regulating field current in said generator rotor; and turbine control means for controlling turbine horsepower, said turbine control means being responsive to said setpoint selection means and said priority selection means with respect to said real power generated output component. - View Dependent Claims (2)
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3. The control apparatus of claim further comprising:
rotor temperature limiting means responsive to the temperature of said generator rotor, said rotor temperature limiting means restricting said field current controller operation by limiting field current when said temperature of said generator rotor reaches a rotor temperature limit.
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4. The control apparatus of claim further comprising:
a reactive output controller for altering field current from said field current controller, said reactive output controller being responsive to said priority selection means and said setpoint selection means. - View Dependent Claims (5, 6)
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7. A control method for a turbine generator comprising the following steps:
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selecting an operation mode for said turbine generator, said operation mode having a high priority output component, a low priority output component, and a variable output component selected from output components including real power generated, power factor, and reactive power generated; selecting an output setpoint for said high priority output component and said low priority output component; said high priority and low priority output components for producing said high priority and said low priority output setpoints while allowing said variable output component to vary; determining if said high priority output setpoint and said low priority output setpoint are within the capability of said turbine generator; varying said low priority output component to produce said high priority output setpoint when said high priority setpoint and said low priority output setpoint are not within the capability of said turbine generator; determining if said high priority output setpoint is within the capability of said turbine generator; and varying said high priority output component when said high priority output setpoint is not within the capability of said turbine generator. - View Dependent Claims (8, 9, 10, 11, 12, 13, 14, 15, 16, 17)
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18. A control method for a turbine generator, comprising the following steps:
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selecting real power generated as a high priority output component for said turbine generator; selecting reactive power generated as a low priority output component for said turbine generator; selecting power factor as a variable output component for said turbine generator; selecting a real power generated setpoint and a reactive power generated setpoint; controlling said real power generated and said reactive power generated while allowing said power factor to vary for producing said real power generated setpoint and said reactive power generated setpoint; determining if said real power generated setpoint and said reactive power generated setpoint are within the capability of said turbine generator; reducing the magnitude of said reactive power generated when said real power generated and said reactive power generated are not within the capability of said turbine generator. - View Dependent Claims (19, 20)
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21. A control method for a turbine generator, comprising the following steps:
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selecting real power generated as a high priority output component for said turbine generator; producing maximum megawatt output for said real power generated up to the turbine firing temperature limit; selecting reactive power generated as a low priority output component; and controlling excitation to produce maximum MVAR output up to generator capacity while still producing said maximum megawatt output up to the turbine firing temperature limit. - View Dependent Claims (22, 23)
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Specification