Patent US6806688B2 successfully refreshed from Google Patents.
US6806688B2
Expired / Lapsed
US
⏱️ 0.0 years remaining
Difference power adjustment apparatus having a capacitor and reactor connected power-system bus
Assignee: Toshiba Corp
•
Filing: 2002-05-06
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Granted: 2004-10-19
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Expires: 2022-05-06
Abstract
Abstract A power adjustment apparatus includes a phase shifter including a stator having a stator winding and a rotor having a rotor winding, a winding terminal of one of the stator winding and the rotor winding being connected to a power-system bus, and a winding terminal of the other being connected to the power-system bus via an impedance load, a driver axially coupled to the rotor to drive the rotor, and a controller which gives the driver a command value to adjust the phase difference between the stator and the rotor to a desired value.
Inventors
- 👤 Yasuhiro Noro
- 👤 Kenji Kudo
- 👤 Yoshihisa Sato
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 16:41
CPC Classifications
H; H02; H02J; H02J3/00; H02J3/18; H02J3/1821; H02J3/1878; Y; Y02; Y02E; Y02E40/00; Y02E40/30
Claims Analysis
Total Claims: 13
Claim 1
Independent Claim
94 words
A power adjustment apparatus comprising: a phase shifter including a stator having a stator winding and a rotor having a rotor winding, a winding terminal of one of said stator winding and said rotor winding being connected to a power-system bus, and a winding terminal of the other being connected to said power-system bus via an impedance load; a driver axially coupled to said rotor to drive said rotor; and a controller which outputs a command to said driver to adjust a phase difference between said stator and said rotor to a desired value.
Claim 2
Dependent Claim
94 words
A power adjustment apparatus comprising: a phase shifter including a stator having a stator winding and a rotor having a rotor winding, a winding terminal of one of said stator winding and said rotor winding being connected to a power-system bus, and a winding terminal of the other being connected to said power-system bus via an impedance load; a driver axially coupled to said rotor to drive said rotor; and a controller which outputs a command to said driver to adjust a phase difference between said stator and said rotor to a desired value.
Claim 3
Dependent Claim
21 words
The apparatus according to claim 1 , further comprising one of a capacitor and a reactor connected to said power-system bus.
Claim 4
Dependent Claim
72 words
The apparatus according to claim 1 , further comprising a power system stabilizing system, wherein said power-system bus has a synchronous generator, and said power system stabilizing system receives a detected speed value from said synchronous generator, calculates a command value of the rotating angle of said rotor in accordance with a deviation between the detected speed and a set value, and outputs the command value to said driver via said controller.
Claim 5
Dependent Claim
34 words
The apparatus according to claim 3 , further comprising a closing circuit breaker between said power-system bus and said phase shifter, wherein said power system stabilizing system closes or opens said closing circuit breaker.
Claim 6
Dependent Claim
24 words
The apparatus according to claim 1 , further comprising a transformer connected between said power-system bus and said rotor winding of said phase shifter.
Claim 7
Dependent Claim
22 words
The apparatus according to claim 1 , wherein said impedance load is at least one of a resistance reactor and a capacitor.
Claim 8
Dependent Claim
52 words
The apparatus according to claim 6 , further comprising a voltage fluctuation suppression controller which receives a bus voltage detected on said power-system bus, calculates a command value of the rotating angle of said rotor in accordance with the magnitude of the bus voltage, and outputs the command value to said controller.
Claim 9
Dependent Claim
96 words
A power adjustment apparatus comprising: a phase shifter including a stator having a stator winding and a rotor having a rotor winding, winding terminals of said stator winding and said rotor winding being directly connected to a power-system bus, the phase shifter having a leakage impedance of said stator and said rotor; a driver axially coupled to said rotor to drive said rotor; and a controller which outputs a command to said driver to adjust a phase difference between said stator and said rotor to a desired value to control power consumed by the leakage impedance.
Claim 10
Dependent Claim
96 words
A power adjustment apparatus comprising: a phase shifter including a stator having a stator winding and a rotor having a rotor winding, winding terminals of said stator winding and said rotor winding being directly connected to a power-system bus, the phase shifter having a leakage impedance of said stator and said rotor; a driver axially coupled to said rotor to drive said rotor; and a controller which outputs a command to said driver to adjust a phase difference between said stator and said rotor to a desired value to control power consumed by the leakage impedance.
Claim 11
Dependent Claim
24 words
The apparatus according to claim 8 , further comprising a transformer connected between said power-system bus and said rotor winding of said phase shifter.
Claim 12
Dependent Claim
21 words
The apparatus according to claim 8 , further comprising one of a capacitor and a reactor connected to said power-system bus.
Claim 13
Dependent Claim
52 words
The apparatus according to claim 8 , further comprising a voltage fluctuation suppression controller which receives a bus voltage detected on said power-system bus, calculates a command value of the rotating angle of said rotor in accordance with the magnitude of the bus voltage, and outputs the command value to said controller.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 2007-10-19 | 2008-04-19 | 2008-10-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2011-10-19 | 2012-04-19 | 2012-10-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2015-10-19 | 2016-04-19 | 2016-10-19 | $7700.00 | Window Closed / Lapsed |