Patent US7423412B2 successfully refreshed from Google Patents.
US7423412B2
Expired / Lapsed
US
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Method, apparatus and computer program product for injecting current
Assignee: GE Vernova Infrastructure Technology LLC
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Filing: 2006-01-31
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Granted: 2008-09-09
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Expires: 2026-01-31
Abstract
Abstract Method and apparatus that provide a response to the negative sequence current demands during a disturbance of the grid system connected to power-generating equipment, such as a wind turbine system, provide for tracking components in the grid signal, orienting at least a portion of the signal, and injecting the oriented portion. Controlled injection of negative sequence current provides for extending small-signal control response, and also provides for modifications of the apparent impedance to the grid interconnect of the power conversion equipment.
Inventors
- 👤 Haiqing Weng
- 👤 Robert A. Seymour
- 👤 John D. D'Atre
- 👤 Allen M. Ritter
- 👤 Xiaoming Yuan
- 👤 Renchang Dai
- 👤 Robert W. Delmerico
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 21:34
CPC Classifications
H; H02; H02P; H02P9/00; H02P9/007; F; F03; F03D; F03D9/00; F03D9/20; F03D9/25; F03D9/255; H02J; H02J3/00; H02J3/38; H02J3/381; H02P29/00; H02P29/02; H02P29/024; H02P29/025; H02J2101/00; H02J2101/20; H02J2101/28; H02J3/40; H02P2101/00; H02P2101/15; H02P2207/00; H02P2207/07; H02P2207/073; Y; Y02; Y02E; Y02E10/00; Y02E10/70; Y02E10/72; Y02E10/76
Claims Analysis
Total Claims: 23
Claim 1
Independent Claim
79 words
A method for modifying an effect of a disturbance in an electric grid on a generator coupled to the grid, the method comprising: tracking at least a negative sequence component and a positive sequence component of a signal of the electric grid; orienting a voltage derived from at least a portion of the magnitude of the negative sequence component for injecting a current into the electric grid; and, injecting the current into the electric grid to modify the disturbance.
Claim 2
Independent Claim
79 words
A method for modifying an effect of a disturbance in an electric grid on a generator coupled to the grid, the method comprising: tracking at least a negative sequence component and a positive sequence component of a signal of the electric grid; orienting a voltage derived from at least a portion of the magnitude of the negative sequence component for injecting a current into the electric grid; and, injecting the current into the electric grid to modify the disturbance.
Claim 3
Dependent Claim
27 words
The method as in claim 1 , wherein each of the negative sequence component and the positive sequence component comprise phase information, frequency information and magnitude information.
Claim 4
Dependent Claim
15 words
The method as in claim 1 , wherein the tracking comprises detecting the grid disturbance.
Claim 5
Dependent Claim
30 words
The method as in claim 1 further comprising obtaining parameters of at least one of the electric grid, the generator and a control system for the generator before the injecting.
Claim 6
Dependent Claim
32 words
The method as in claim 1 , wherein modifying the effect comprises increasing small signal linearity for at least one of a positive sequence grid condition and a negative sequence grid condition.
Claim 7
Dependent Claim
25 words
The method as in claim 1 , wherein the effect comprises an effect upon at least one of a steady-state condition and a transient condition.
Claim 8
Dependent Claim
16 words
The method as in claim 1 , wherein modifying comprises reducing actuation of system protection features.
Claim 9
Dependent Claim
18 words
The method as in claim 1 , wherein the at least a portion is within a predetermined range.
Claim 10
Dependent Claim
41 words
The method as in claim 1 , wherein the voltage derived from at least a portion of the magnitude of the negative sequence component is oriented for maximizing at least one of the active power injection and the reactive power injection.
Claim 11
Dependent Claim
22 words
The method as in claim 1 , wherein the injecting the current comprises emulating a synchronous generator connected to the electric grid.
Claim 12
Dependent Claim
20 words
The method as in claim 1 , wherein the injecting reduces the amount of asymmetric voltage in the grid current.
Claim 13
Dependent Claim
37 words
The method as in claim 1 , wherein the modifying comprises modifying the apparent impedance of at least one of the generator, the positive sequence component, the negative sequence component and a harmonic frequency of the signal.
Claim 14
Independent Claim
82 words
An apparatus for modifying an effect of a disturbance in an electric grid on a generator coupled to the grid, the apparatus comprising: a controller for tracking at least a negative sequence component and a positive sequence component of a signal of the electric grid, orienting a voltage derived from at least a portion of the magnitude of the negative sequence component for injecting a current into the electric grid; and, injecting the current into the electric grid to modify the disturbance.
Claim 15
Independent Claim
82 words
An apparatus for modifying an effect of a disturbance in an electric grid on a generator coupled to the grid, the apparatus comprising: a controller for tracking at least a negative sequence component and a positive sequence component of a signal of the electric grid, orienting a voltage derived from at least a portion of the magnitude of the negative sequence component for injecting a current into the electric grid; and, injecting the current into the electric grid to modify the disturbance.
Claim 16
Dependent Claim
88 words
A computer program product stored on machine readable media, the product comprising instructions for modifying an effect of a disturbance in an electric grid on a generator coupled to the grid, by: tracking at least a negative sequence component and a positive sequence component of a signal of the electric grid; orienting a voltage derived from at least a portion of the magnitude of the negative sequence component for injecting a current into the electric grid; and, injecting the current into the electric grid to modify the disturbance.
Claim 17
Dependent Claim
88 words
A computer program product stored on machine readable media, the product comprising instructions for modifying an effect of a disturbance in an electric grid on a generator coupled to the grid, by: tracking at least a negative sequence component and a positive sequence component of a signal of the electric grid; orienting a voltage derived from at least a portion of the magnitude of the negative sequence component for injecting a current into the electric grid; and, injecting the current into the electric grid to modify the disturbance.
Claim 18
Dependent Claim
17 words
The computer program product as in claim 14 , wherein the tracking comprises detecting the grid disturbance.
Claim 19
Dependent Claim
34 words
The computer program product as in claim 14 further comprising instructions for using parameters of at least one of the electric grid, the generator and a control system for the generator before the injecting.
Claim 20
Dependent Claim
30 words
The computer program product as in claim 14 , wherein injecting comprises extending small signal linearity for at least one of the negative sequence component and the positive sequence component.
Claim 21
Dependent Claim
27 words
The computer program product as in claim 14 , wherein the effect comprises an effect upon at least one of a steady-state condition and a transient condition.
Claim 22
Dependent Claim
18 words
The computer program product as in claim 14 , wherein modifying comprises reducing actuation of system protection features.
Claim 23
Dependent Claim
20 words
The computer program product as in claim 14 , wherein the at least a portion is within a predetermined range.
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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) | 2011-09-09 | 2012-03-10 | 2012-09-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2015-09-09 | 2016-03-10 | 2016-09-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2019-09-09 | 2020-03-10 | 2020-09-09 | $7700.00 | Window Closed / Lapsed |