Gas turbine power plant control apparatus including a speed/load hold and lock system
AssigneeWestinghouse Electric Corp.
InventorsRobert A. Yannone, James J. Shields
Life of this patent
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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.
Claims20
A gas turbine electric power plant including a gas turbine having compressor, combustion and turbine elements, a generator coupled to said gas turbine for drive power, a generator breaker for coupling said generator to a power system so as to provide means for delivering power to the power system, a fuel system for supplying fuel to said gas turbine combustion element including control means for regulating the fuel flow as a function of a fuel scheduling control signal developed thereby, and a fuel scheduling control system for controlling the load accepted by said turbine, said fuel scheduling control system comprising:
- a. a first means for accepting turbine load at breaker closing of a predetermined minimum level;
- b. second means for automatically raising accepted turbine load from said minimum level to, and maintaining it at, one of a plurality of temperature limited turbine load levels, upon selection of one of said turbine load levels;
- c. third means for changing accepted turbine load from one of said temperature limited turbine load levels to another;
- and
- d. fourth means for interrupting changes in accepted turbine load and holding it at any available level, said first, second, third and fourth means being all cooperatively coupled to said fuel system and adapted to commensurately modify said fuel scheduling control signal developed thereby in accordance with the turbine load to be accepted.
A gas turbine electric power plant including a gas turbine having compressor, combustion and turbine elements, a generator coupled to said gas turbine for drive power, a generator breaker for coupling said generator to a power system so as to provide means for delivering power to the power system, a fuel system for supplying fuel to said gas turbine combustion element including control means for regulating the fuel flow as a function of a fuel scheduling control signal developed thereby, and a fuel scheduling control system for controlling the load accepted by said turbine, said fuel scheduling control system comprising:
- a. first means for accepting turbine load at breaker closing of a predetermined minimum level;
- b. second means for raising accepted turbine load from said minimum level at a load change rate selectable from two different rates;
- c. third means for maintaining turbine load at one of a plurality of temperature limited turbine load levels, upon selection of one of said turbine load levels;
- d. fourth means for changing accepted turbine load from one of said temperature limited turbine load levels to another;
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- e. fifth means for interrupting changes in accepted turbine load and holding it at any available level, said first, second, third, fourth and fifth means being all cooperatively coupled to said fuel system and adapted to commensurately modify said fuel scheduling control signal developed thereby in accordance with the turbine load to be accepted.
Dependencies are inferred from the claim text.