Gas turbine power plant control apparatus including a turbine load control system
First Claim
1. A gas turbine electric power plant including a gas turbine having compressor, combustion and turbine elements, a generator coupled to the gas turbine for drive power, a generator breaker for coupling said generator to a power system so as to deliver power to the power system, a fuel system for supplying fuel to said gas turbine combustion element, and a turbine load control system for controlling the load accepted by said turbine, said turbine load control system comprising:
- a. a first control path for generating a first control signal adaptable to control the acceptance of turbine load according to a first predetermined schedule;
b. a second control path for generating a second control signal adaptable to control the acceptance of turbine load according to a second schedule, and having means for selectively initiating generation of said second control signal in accordance with operator choice;
c. said second control path including means for selecting the rate of change of said generated second control signal from a plurality of rates;
d. means for comparing said control signals in accordance with a predetermined arrangement, and for providing a turbine load acceptance control signal derived from said comparison; and
e. means for operating said fuel system with said derived turbine load acceptance control signal to schedule the acceptance of turbine load after generator breaker closing.
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Abstract
A gas turbine power plant is provided with an industrial gas turbine which drives a generator coupled to a power system through a breaker. The turbine-generator plant is operated by a hybrid control system having digital function capability during sequenced startup, synchronizing, load buildup and steady state load, and shutdown operations. The control system also contains monitoring and protective subsystems which function through all stages of operation, with redundancy and permissive features which maximize turbine availability.
53 Citations
20 Claims
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1. A gas turbine electric power plant including a gas turbine having compressor, combustion and turbine elements, a generator coupled to the gas turbine for drive power, a generator breaker for coupling said generator to a power system so as to deliver power to the power system, a fuel system for supplying fuel to said gas turbine combustion element, and a turbine load control system for controlling the load accepted by said turbine, said turbine load control system comprising:
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a. a first control path for generating a first control signal adaptable to control the acceptance of turbine load according to a first predetermined schedule; b. a second control path for generating a second control signal adaptable to control the acceptance of turbine load according to a second schedule, and having means for selectively initiating generation of said second control signal in accordance with operator choice; c. said second control path including means for selecting the rate of change of said generated second control signal from a plurality of rates; d. means for comparing said control signals in accordance with a predetermined arrangement, and for providing a turbine load acceptance control signal derived from said comparison; and e. means for operating said fuel system with said derived turbine load acceptance control signal to schedule the acceptance of turbine load after generator breaker closing. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10)
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11. A gas turbine electric power plant including a gas turbine having compressor, combustion and turbine elements, a generator coupled to the gas turbine for drive power, a generator breaker for coupling said generator to a power system so as to deliver power to the power system, a fuel system for supplying fuel to said gas turbine combustion element, and a turbine load control system for controlling the load accepted by said turbine, said turbine load control system comprising:
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a. a first closed loop control path for generating a first control signal adaptable to control the acceptance of turbine load according to a first predetermined schedule; b. a second closed loop control path for generating a second control signal adaptable to control the acceptance of turbine load according to a second schedule, and having means for selectively initiating generation of said second control signal in accordance with operator choice; c. said second closed loop control path including means for selecting the rate of change of said generated second control signal from a plurality of rates; d. means for comparing said control signals in accordance with a predetermined arrangement, and for providing a turbine load acceptance control signal derived from said comparison; and e. means for operating said fuel system with said derived turbine load acceptance control signal to schedule the acceptance of turbine load after generator breaker closing. - View Dependent Claims (12, 13, 14, 15, 16, 17, 18, 19, 20)
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Specification