US5610501A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Dynamic power and voltage regulator for an ac transmission line
Assignee: Siemens Energy Inc
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Filing: 1995-02-01
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Granted: 1997-03-11
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Expires: 2015-02-01
Abstract
Abstract Apparatus for providing reactive compensation and positive real power compensation in an ac electric power transmission system, utilizes a solid state inverter to inject a series compensation voltage into the transmission line at a controllable magnitude and a controllable phase angle between + or -90 electrical degrees relative to transmission line current. The positive real power needed by the inverter is drawn from the transmission line by a rectifier shunt connected to the line.
Inventors
- 👤 Robert J. Nelson
- 👤 Donald G. Ramey
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 16:30
CPC Classifications
H; H02; H02J; H02J3/00; H02J3/18; H02J3/1807; H02J3/1814; H02J3/04; H02J3/06; Y; Y02; Y02E; Y02E40/00; Y02E40/10
Claims Analysis
Total Claims: 12
Claim 1
Independent Claim
143 words
Apparatus for controlling an alternating current transmission system including a transmission line carrying alternating current at a selected transmission line voltage, and fundamental frequency said apparatus comprising: switching power converter means generating an alternating voltage at said fundamental frequency of said alternating current with a controllable magnitude and a controllable phase angle between -90 electrical degrees and +90 electrical degrees relative to said alternating current to inject adjustable reactive compensation and adjustable positive real power; means coupling said alternating voltage generated by said switching power converter means into said transmission line to inject said adjustable reactive compensation and adjustable positive real power into said transmission line; and in series with said transmission line voltage; and rectifier means connected in shunt to said transmission line and to said switching power converter means to provide said positive real power to said switching power converter means.
Claim 2
Dependent Claim
143 words
Apparatus for controlling an alternating current transmission system including a transmission line carrying alternating current at a selected transmission line voltage, and fundamental frequency said apparatus comprising: switching power converter means generating an alternating voltage at said fundamental frequency of said alternating current with a controllable magnitude and a controllable phase angle between -90 electrical degrees and +90 electrical degrees relative to said alternating current to inject adjustable reactive compensation and adjustable positive real power; means coupling said alternating voltage generated by said switching power converter means into said transmission line to inject said adjustable reactive compensation and adjustable positive real power into said transmission line; and in series with said transmission line voltage; and rectifier means connected in shunt to said transmission line and to said switching power converter means to provide said positive real power to said switching power converter means.
Claim 3
Dependent Claim
15 words
The apparatus of claim 1, wherein the rectifier means comprises a plurality of controlled rectifiers.
Claim 4
Independent Claim
95 words
An apparatus for dynamically changing voltage in an ac transmission line or an ac distribution line carrying ac current at a fundamental frequency, said apparatus comprising: switching power converter means generating an adjustable alternating voltage at said fundamental frequency of said ac current with a controllable magnitude; means coupling said adjustable alternating voltage generated by said switching power converter means in series with said transmission line; and rectifier means connected in shunt to said transmission line and connected to said switching power converter means to provide positive real power to said switching power converter means.
Claim 5
Independent Claim
95 words
An apparatus for dynamically changing voltage in an ac transmission line or an ac distribution line carrying ac current at a fundamental frequency, said apparatus comprising: switching power converter means generating an adjustable alternating voltage at said fundamental frequency of said ac current with a controllable magnitude; means coupling said adjustable alternating voltage generated by said switching power converter means in series with said transmission line; and rectifier means connected in shunt to said transmission line and connected to said switching power converter means to provide positive real power to said switching power converter means.
Claim 6
Dependent Claim
16 words
The apparatus of claim 3, wherein said switching power converter means comprises a multiple phase inverter.
Claim 7
Independent Claim
145 words
A method for controlling an alternating current transmission system including a transmission line carrying alternating current at a selected transmission line voltage, and fundamental frequency said apparatus comprising: generating an alternating voltage at said fundamental frequency of said alternating current with a controllable magnitude and a controllable phase angle between -90 electrical degrees and +90 electrical degrees relative to said alternating current to inject adjustable reactive compensation and adjustable real power; coupling said alternating voltage into said transmission line to inject said adjustable reactive compensation and adjustable positive real power into said transmission line, and in series with said transmission line voltage; and using a rectifier means connected in shunt to said transmission line to provide said positive real power for the step of generating an alternating voltage at said fundamental frequency of said alternating current with a controllable magnitude and a controllable phase angle.
Claim 8
Independent Claim
145 words
A method for controlling an alternating current transmission system including a transmission line carrying alternating current at a selected transmission line voltage, and fundamental frequency said apparatus comprising: generating an alternating voltage at said fundamental frequency of said alternating current with a controllable magnitude and a controllable phase angle between -90 electrical degrees and +90 electrical degrees relative to said alternating current to inject adjustable reactive compensation and adjustable real power; coupling said alternating voltage into said transmission line to inject said adjustable reactive compensation and adjustable positive real power into said transmission line, and in series with said transmission line voltage; and using a rectifier means connected in shunt to said transmission line to provide said positive real power for the step of generating an alternating voltage at said fundamental frequency of said alternating current with a controllable magnitude and a controllable phase angle.
Claim 9
Dependent Claim
55 words
The method of claim 5 wherein the controllable magnitude of the alternating voltage and the controllable phase angle of the alternating voltage to any phase angle between -90 electrical degrees and +90 electrical degrees relative to said alternating current effects independent regulation of transmission line series impedance and phase angle of said transmission line voltage.
Claim 10
Dependent Claim
58 words
The method of claim 5 wherein the controllable magnitude of the alternating voltage and the controllable phase angle of the alternating voltage to any phase angle between -90 electrical degrees and +90 electrical degrees relative to said alternating current effects dynamic regulation of said transmission line voltage in response to a dynamic variation in said transmission line voltage.
Claim 11
Independent Claim
92 words
A method for dynamically changing voltage in an ac transmission line or an ac distribution line carrying ac current at a fundamental frequency, said apparatus comprising: generating an adjustable alternating voltage at said fundamental frequency of said ac current with a controllable magnitude; coupling said adjustable alternating voltage generated by said switching power converter means in series with said transmission line; and using a rectifier means connected in shunt to said transmission line and connected to said switching power converter means to provide positive real power to said switching power converter means.
Claim 12
Independent Claim
92 words
A method for dynamically changing voltage in an ac transmission line or an ac distribution line carrying ac current at a fundamental frequency, said apparatus comprising: generating an adjustable alternating voltage at said fundamental frequency of said ac current with a controllable magnitude; coupling said adjustable alternating voltage generated by said switching power converter means in series with said transmission line; and using a rectifier means connected in shunt to said transmission line and connected to said switching power converter means to provide positive real power to said switching power converter means.
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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) | 2000-03-10 | 2000-09-09 | 2001-03-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2004-03-10 | 2004-09-09 | 2005-03-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2008-03-10 | 2008-09-09 | 2009-03-11 | $7700.00 | Window Closed / Lapsed |