US3609384A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Control means for stabilizing a steam-driven reheat-type turbine generator after sudden runback of electric generation
Assignee: Electrodyne Research Corp
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Filing: 1969-09-03
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Granted: 1971-09-28
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Expires: 1989-09-03
Abstract
Abstract The invention provides a means of minimizing acceleration of a steam-driven reheat-type turbine generator after sudden partial runback of electric generation as a result of stored energy in the turbine driver whereby flow of reheated steam to the reheat turbine through the intercepter valves is controlled as a function of upstream pressure and similarly steam flow to the high pressure turbine is controlled by pressure of said high pressure turbine to regulate electrical output after runback and while simultaneously releasing surplus energy.
Inventors
- 👤 Charles Strohmeyer Jr
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 05:40
CPC Classifications
F; F01; F01K; F01K9/00; F01K9/04; F01D; F01D21/00; F01D21/02; F01K7/00; F01K7/16; F01K7/22; F01K7/24
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
209 words
In a steam-electric generating unit including a steam generator connected to a turbine driver through conduit and first steam flow control valve means, means for extracting partially expanded steam intermediately from said turbine driver, a steam reheater, conduit means for conveying said extraction steam to said reheater, conduit means for conveying reheated steam from said reheater to said turbine driver for continued expansion of said steam in said turbine driver, second steam flow control valve means incorporated in said last steam conduit means, poweroperated means for said first and said second control valve means, an electric generator connected to said turbine driver; the invention comprising control means including means for sensing and measuring (a) steam pressure intermediately between said first and said second valve means and (b) fast reduction of electrical output from said electric generator, said control means being adapted to stabilize steam flow in said turbine driver downstream of said second valve means following a measured fast reduction in electrical output, said power-operated means being adapted to open and close said first and said second valve means in response to said control means from variations in said intermediately measured steam pressure, said response being initiated by said measured fast reduction in electrical output from said electric generator.
Claim 2
Dependent Claim
209 words
In a steam-electric generating unit including a steam generator connected to a turbine driver through conduit and first steam flow control valve means, means for extracting partially expanded steam intermediately from said turbine driver, a steam reheater, conduit means for conveying said extraction steam to said reheater, conduit means for conveying reheated steam from said reheater to said turbine driver for continued expansion of said steam in said turbine driver, second steam flow control valve means incorporated in said last steam conduit means, poweroperated means for said first and said second control valve means, an electric generator connected to said turbine driver; the invention comprising control means including means for sensing and measuring (a) steam pressure intermediately between said first and said second valve means and (b) fast reduction of electrical output from said electric generator, said control means being adapted to stabilize steam flow in said turbine driver downstream of said second valve means following a measured fast reduction in electrical output, said power-operated means being adapted to open and close said first and said second valve means in response to said control means from variations in said intermediately measured steam pressure, said response being initiated by said measured fast reduction in electrical output from said electric generator.
Claim 3
Dependent Claim
43 words
Control means as recited in claim 1 wherein said means for sensing and measuring steam pressure intermediately between said first and said second valve means comprises a single measuring point for controlling the action of both said first and said second valve means.
Claim 4
Dependent Claim
44 words
Control means as recited in claim 1 wherein said means for sensing and measuring steam pressure intermediately between said first and said second valve means comprises a separate measuring point for controlling the action of each of said first and said second valve means.
Claim 5
Dependent Claim
53 words
Control means as recited in claim 1 including means to regulate steam pressure at a point intermediately between said first and said second valve means and to a preset parameter through actuation of said power-operated first steam flow control valve means following said measured fast reduction in electrical output from said electric generator.
Claim 6
Dependent Claim
57 words
Control means as recited in claim 1 including means to position said power-operated second steam flow control valve means to a preset parameter in response to (a) said steam pressure measurement intermediately between said first and said second valve means and (b) desired load setpoint following said measured fast reduction in electrical output from said electric generator.
Claim 7
Dependent Claim
41 words
Control means as recited in claim 1 including power actuated steam relief valve means for drawing steam away from said conduit means upstream of said first valve means responsive to said measured fast reduction in electrical output from said electric generator.
Claim 8
Dependent Claim
40 words
Control means as recited in claim 1 including power-actuated steam relief valve means connected to the steam flow path between said first and said second valve means responsive to said measured fast reduction in electrical output from said electric generator.
References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1974-09-27 | 1975-03-29 | 1975-09-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-09-27 | 1979-03-29 | 1979-09-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-09-27 | 1983-03-29 | 1983-09-28 | $7700.00 | Window Closed / Lapsed |