US4546303A
Expired / Lapsed
US
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Static reactive-power compensation apparatus
Assignee: Mitsubishi Electric Corp
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Filing: 1984-03-29
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Granted: 1985-10-08
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Expires: 2004-03-29
Abstract
Abstract A static reactive-power compensating apparatus in which transients having a frequency below a predetermined frequency are not compensated for while all other variations are fully compensated for. A reset filter circuit is connected between the output of a rectifier circuit and a thyristor control circuit, the latter controlling the firing of thyristors which couple a reactive energy storage bank to the power system for compensating for voltage variations in the system. Preferably, the reset filter has a transfer characteristic of sT 1 /(1+sT 1 ).
Inventors
- 👤 Takafumi Maeda
- 👤 Setsurou Mine
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 10:38
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: 4
Claim 1
Independent Claim
80 words
A static reactive-power compensating apparatus comprising: reactor energy storing means; thyristor means for selectively coupling said energy storing means to a power system to compensate for voltage variations in said power system; a thyristor control circuit for controlling said thyristors; a rectifier circuit for rectifying a line voltage of said power system; and a reset filter circuit having an input coupled to an output of said rectifier and an output applied to a controlling input of said thyristor control circuit.
Claim 2
Dependent Claim
80 words
A static reactive-power compensating apparatus comprising: reactor energy storing means; thyristor means for selectively coupling said energy storing means to a power system to compensate for voltage variations in said power system; a thyristor control circuit for controlling said thyristors; a rectifier circuit for rectifying a line voltage of said power system; and a reset filter circuit having an input coupled to an output of said rectifier and an output applied to a controlling input of said thyristor control circuit.
Claim 3
Dependent Claim
23 words
The static reactive-power compensating apparatus of claim 1, wherein said reset filter has a transfer characteristic defined by sT 1 /(1+sT 1 ).
Claim 4
Dependent Claim
26 words
The static reactive-power compensating apparatus of claim 1, wherein a value of T 1 is determined in accordance with a minimum control time of said apparatus.
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) | 1988-10-07 | 1989-04-08 | 1989-10-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1992-10-07 | 1993-04-08 | 1993-10-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1996-10-07 | 1997-04-08 | 1997-10-08 | $7700.00 | Window Closed / Lapsed |