US3792288A
Expired / Lapsed
US
⏱️ 0.0 years remaining
A. c. power transmission systems
Assignee: Associated Electrical Industries Ltd
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Filing: 1972-08-09
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Granted: 1974-02-12
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Expires: 1992-08-09
Abstract
Abstract An alternating current power transmission system having a transmission line and at least one saturated reactor connected in shunt with the transmission line, in which there are provided control means for controlling the current voltage characteristic of the reactor to give a positive damping of oscillations induced in the system as a result of a disturbance occurring in the system.
Inventors
- 👤 E Friedlander
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 20:25
CPC Classifications
H; H02; H02J; H02J3/00; H02J3/001; H02J3/0014
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
58 words
An alternating current power transmission system, including A. a transmission line, B. an alternating current saturated reactor connected in shunt with the transmission line, and C. means controlling the current voltage characteristic of the saturated reactor in a manner giving positive damping of oscillations induced in the system as a result of a disturbance occurring in the system.
Claim 2
Dependent Claim
58 words
An alternating current power transmission system, including A. a transmission line, B. an alternating current saturated reactor connected in shunt with the transmission line, and C. means controlling the current voltage characteristic of the saturated reactor in a manner giving positive damping of oscillations induced in the system as a result of a disturbance occurring in the system.
Claim 3
Dependent Claim
103 words
An alternating current power transmission system including A. a transmission line, B. a primary alternating current saturated reactor comprising a. a group of reactor cores carrying i. primary windings connected in shunt with the transmission line and wound as for magnetic frequency multiplication, and ii. secondary windings in the form of a closed polyphase mesh, C. a saturated compensating reactor having a star connected primary winding connected to tapping points on the mesh, and D. means for controlling the compensating reactor in the manner giving positive damping of oscillations induced in the system as a result of a disturbance occurring in the system.
Claim 4
Dependent Claim
103 words
An alternating current power transmission system including A. a transmission line, B. a primary alternating current saturated reactor comprising a. a group of reactor cores carrying i. primary windings connected in shunt with the transmission line and wound as for magnetic frequency multiplication, and ii. secondary windings in the form of a closed polyphase mesh, C. a saturated compensating reactor having a star connected primary winding connected to tapping points on the mesh, and D. means for controlling the compensating reactor in the manner giving positive damping of oscillations induced in the system as a result of a disturbance occurring in the system.
Claim 5
Dependent Claim
66 words
An alternating current power transmission system according to claim 2 wherein the compensating reactor has a control winding, and means is provided for supplying the control winding with direct current related to the current in the primary windings of the primary reactor in a sense which gives said positive damping of oscillations induced in the system as a result of a disturbance occurring in the system.
Claim 6
Dependent Claim
83 words
An alternating current power transmission system according to claim 2 wherein the compensating reactor has a secondary winding in the form of a closed mesh, and means is provided for varying the effective number of turns of the primary winding of the compensating reactor in response to variations in the current in the primary winding of the primary reactor in a sense which gives said positive damping of oscillations induced in the system as a result of a disturbance occurring in the system.
Claim 7
Dependent Claim
72 words
An alternating current power transmission system according to claim 15, in which the compensating reactor is provided by a Transductor, and wherein a part of the connection between the star-connected primary winding of the compensating reactor and the closed polyphase mesh of the primary reactor forms the primary winding of a current transformer, which current transformer has a secondary winding connected to feed a bridge rectifier providing d.c. excitation for the transductor.
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) | 1977-02-11 | 1977-08-13 | 1978-02-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-02-11 | 1981-08-13 | 1982-02-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-02-11 | 1985-08-13 | 1986-02-12 | $7700.00 | Window Closed / Lapsed |