US4555659A
Expired / Lapsed
US
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Static VAR generator system having improved response time
Assignee: ASEA BROWN BOVERI Inc
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Filing: 1984-02-27
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Granted: 1985-11-26
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Expires: 2004-02-27
Abstract
Abstract A static VAR generator utilizing a multitude of reactor banks each having different computation circuits and firing angle control circuits is provided. The different computation and firing angle control circuits allows the VAR generator the flexibility of being able to change the reactor power in an A.C. network repetitively in any cycle in response to rapid changes in load demand. This is accomplished by each reactor bank having progressively longer computation times and later insertion of additional banks into the network after the first bank has responded to load demand.
Inventors
- 👤 Laszlo Gyugyi
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 01:47
CPC Classifications
H; H02; H02J; H02J3/00; H02J3/18; H02J3/1821; H02J3/1835; H02J3/1864; Y; Y02; Y02E; Y02E40/00; Y02E40/10
Claims Analysis
Total Claims: 3
Claim 1
Independent Claim
131 words
A static VAR generator, comprising: (a) a plurality of reactance means connected to anti-parallel thyristors for connection into an AC network; (b) a VAR monitoring means connected to the A.C. network for monitoring its reactive requirements; (c) a plurality of control means connected to the VAR monitoring means and each of said plurality of control means is connected to at least one of said plurality of reactance means for individually connecting a reactance means into the A.C. network in response to its reactive requirements; and (d) each of said plurality of control means is comprised of a phase angle firing control for the anti-parallel thyristors having different firing intervals wherein the different firing intervals provide for progressively later connection of each of said plurality of reactance means into the A.C. network.
Claim 2
Dependent Claim
131 words
A static VAR generator, comprising: (a) a plurality of reactance means connected to anti-parallel thyristors for connection into an AC network; (b) a VAR monitoring means connected to the A.C. network for monitoring its reactive requirements; (c) a plurality of control means connected to the VAR monitoring means and each of said plurality of control means is connected to at least one of said plurality of reactance means for individually connecting a reactance means into the A.C. network in response to its reactive requirements; and (d) each of said plurality of control means is comprised of a phase angle firing control for the anti-parallel thyristors having different firing intervals wherein the different firing intervals provide for progressively later connection of each of said plurality of reactance means into the A.C. network.
Claim 3
Dependent Claim
34 words
A static VAR generator as recited in claim 1 wherein each of said plurality of reactance means is proportionally reduced in value to provide equal maximum current outputs irrespective of their different firing intervals.
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) | 1988-11-25 | 1989-05-27 | 1989-11-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1992-11-25 | 1993-05-27 | 1993-11-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1996-11-25 | 1997-05-27 | 1997-11-26 | $7700.00 | Window Closed / Lapsed |