US4412422A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Apparatus and method for controlling a multi-turbine installation
Assignee: General Electric Co
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Filing: 1981-08-31
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Granted: 1983-11-01
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Expires: 2001-08-31
Abstract
Abstract The invention is practiced by providing a plurality of turbine-driven systems each producing an output proportional to a respective control signal, means for generating a respective first output signal for each of the turbine-driven systems proportional to a respective first system-output indicating parameter, means for generating a respective error signal for each of the turbine-driven systems proportional to any deviation of a respective second system-output indicating parameter from a respective complementary portion of the combined second system-output parameters of the systems, and means for generating the respective control signal of each of said turbine-driven systems and proportional to any deviations of respective ones of the first output signal and the error signal from a respective predetermined reference value of said first parameter, whereby a predetermined relationship of the individual outputs of the turbine-driven systems is maintained. The invention further comprises a logic controlled switching means effective for determining the number of the turbine-driven systems within the plurality included for sharing combined outputs, electrically connecting each included turbine-driven system to the control apparatus, and electrically isolating each of those turbine-driven systems to be excluded therefrom.
Inventors
- 👤 Anthony J. Rossi
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 11:41
CPC Classifications
F; F01; F01D; F01D17/00; F01D17/20; F01D17/22; F01D17/24; H; H02; H02P; H02P5/00; H02P5/46
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
143 words
In a control apparatus for a multi-turbine installation, the combination comprising: a plurality of turbine-driven systems, each producing an output proportional to a respective control signal; means for generating a respective first error signal for each of said turbine-driven systems and proportional to any deviation of a respective first system-output indicating parameter from a respective predetermined reference value therefor; means for generating a respective second error signal for each of said turbine-driven systems and proportional to any deviation of a respective second system-output indicating parameter from a respective complementary portion of the combined second system-output indicating parameters of said systems; and means for generating the respective control signal for each of said turbine-driven systems and proportional to the sum of respective ones of said first and second error signals, whereby a predetermined relationship of the individual outputs of said turbine-driven systems is maintained.
Claim 2
Dependent Claim
143 words
In a control apparatus for a multi-turbine installation, the combination comprising: a plurality of turbine-driven systems, each producing an output proportional to a respective control signal; means for generating a respective first error signal for each of said turbine-driven systems and proportional to any deviation of a respective first system-output indicating parameter from a respective predetermined reference value therefor; means for generating a respective second error signal for each of said turbine-driven systems and proportional to any deviation of a respective second system-output indicating parameter from a respective complementary portion of the combined second system-output indicating parameters of said systems; and means for generating the respective control signal for each of said turbine-driven systems and proportional to the sum of respective ones of said first and second error signals, whereby a predetermined relationship of the individual outputs of said turbine-driven systems is maintained.
Claim 3
Dependent Claim
85 words
The control apparatus of claim 1, wherein each of said turbine-driven systems comprises a turbine-pump set, said means for generating a first error signal provides a signal proportional to any difference between an actual rotor speed and a demand level rotor speed of said set, and said means for generating a second error signal provides a signal proportional to any difference between actual pump volume output of said set and the average of the combined pump volume outputs of a plurality of turbine pump sets.
Claim 4
Dependent Claim
92 words
The control apparatus of claim 1, wherein each of said turbine-driven systems comprises a single automatic extraction turbine providing extraction steam, said means for generating a first error signal provides a signal proportional to any difference between an actual extraction steam pressure and a demand level extraction steam pressure of said set, and said means for generating a second error signal provides a signal proportional to any difference between actual extraction steam flow output of said turbine and the average of the combined extraction steam flow outputs of a pluratlity of turbines.
Claim 5
Dependent Claim
83 words
The control apparatus of claim 1, wherein each of said turbine-driven systems comprises a turbine-generator set, said means for generating a first error signal provides a signal proportional to any difference between an actual rotor speed and a demand level rotor speed of said set, and said means for generating a second error signal provides a signal proportional to any difference between actual generator kilowatt output of said set and the average of the combined generator kilowatt outputs of a plurality of sets.
Claim 6
Dependent Claim
99 words
The control apparatus of claim 1, wherein said means for generating a respective second error signal further comprises: an output sensor for each turbine-driven system for generating a second system-output signal proportional to the output of said system; means for generating an average output signal proportional to an average of the combined second system-output signals of said systems; means for obtaining the difference of said average output signal from each said second system-output signals for providing the respective second error signals; and means for compensating said respective second error signals for enhancing the dynamic characteristics of the control signals.
Claim 7
Dependent Claim
103 words
The control apparatus of claim 5, wherein said means for compensating the respective second error signals each comprises: a proportional control channel for generating a signal responsive to any transient differences between said second system-output signals of the plurality of turbine-driven systems contained in said second error signal; an integral control channel for generating a signal responsive to any steady-state differences between said second system-output signals of the plurality of turbine-driven systems contained in said second error signal; and means for summing the signals from said proportional control channel and said integral control channel to effect said compensation of said second error signal.
Claim 8
Dependent Claim
52 words
The control apparatus as recited in claim 1, further comprising logic-controlled switching means effective for determining the number of said turbine-driven systems within said plurality included for sharing combined outputs, electrically connecting each included turbine-driven system to said control apparatus, and electrically isolating each of those turbine-driven systems to be excluded therefrom.
Claim 9
Independent Claim
132 words
A method for sharing the combined outputs of a plurality of turbine-driven systems each providing an output proportional to a respective control signal comprising the steps of: generating a first error signal in each of said turbine-driven systems proportional to any deviation of a predetermined first system-output indicating parameter from a predetermined reference value therefor; generating a second error signal in each of said turbine-driven systems proportional to any deviation of a predetermined second system-output indicating parameter from a respective complementary portion of combined second system-output indicating parameters of said systems; and generating a control signal in each of said turbine-driven systems proportional to respective first and second error signals for controlling the output of each said systems, whereby a predetermined relationship of the individual output of said turbine-driven systems is maintained.
Claim 10
Independent Claim
132 words
A method for sharing the combined outputs of a plurality of turbine-driven systems each providing an output proportional to a respective control signal comprising the steps of: generating a first error signal in each of said turbine-driven systems proportional to any deviation of a predetermined first system-output indicating parameter from a predetermined reference value therefor; generating a second error signal in each of said turbine-driven systems proportional to any deviation of a predetermined second system-output indicating parameter from a respective complementary portion of combined second system-output indicating parameters of said systems; and generating a control signal in each of said turbine-driven systems proportional to respective first and second error signals for controlling the output of each said systems, whereby a predetermined relationship of the individual output of said turbine-driven systems is maintained.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1986-10-31 | 1987-05-02 | 1987-11-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1990-10-31 | 1991-05-02 | 1991-11-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1994-10-31 | 1995-05-02 | 1995-11-01 | $7700.00 | Window Closed / Lapsed |