Patent US3396950A successfully refreshed from Google Patents.
Patent US7425771B2 successfully refreshed from Google Patents.
US7425771B2
Expired / Lapsed
US
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Variable speed wind turbine having an exciter machine and a power converter not connected to the grid
Assignee: Ingeteam SA
•
Filing: 2006-06-30
•
Granted: 2008-09-16
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Expires: 2026-06-30
Abstract
Abstract A variable speed wind turbine having a doubly fed induction generator (DFIG), includes an exciter machine mechanically coupled to the DFIG and a power converter placed between a rotor of the DFIG and the exciter machine. Thus, the power converter is not directly connected to the grid avoiding the introduction of undesired harmonic distortion and achieving a better power quality fed into the utility grid. Moreover, the variable speed wind turbine includes a power control and a pitch regulation.
Inventors
- 👤 Gregorio Rivas
- 👤 Iker Garmendia
- 👤 Josu Elorriaga
- 👤 Jesus Mayor
- 👤 Javier Perez Barbachano
- 👤 David Sole
- 👤 Jorge Acedo
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 10:15
CPC Classifications
F; F03; F03D; F03D7/00; F03D7/02; F03D7/028; F03D7/0284; F03D7/022; F03D7/0224; F03D9/00; F03D9/20; F03D9/25; F03D9/255; H; H02; H02P; H02P21/00; H02P21/22; H02P3/00; H02P3/06; H02P3/18; H02P3/22; H02P9/00; H02P9/007; H02P9/10; F05; F05B; F05B2200/00; F05B2200/20; F05B2200/26; F05B2200/261; F05B2260/00; F05B2260/70; F05B2260/75; F05B2270/00; F05B2270/10; F05B2270/1016; F05B2270/109; F05B2270/30; F05B2270/337; H02P2101/00; H02P2101/15; H02P2207/00; H02P2207/07; H02P2207/076; Y; Y02; Y02E; Y02E10/00; Y02E10/70; Y02E10/72
Claims Analysis
Total Claims: 40
Claim 1
Independent Claim
84 words
A variable speed wind turbine system comprising: a first rotor shaft including at least one blade; a doubly fed induction generator coupled to the first rotor shaft and having a stator connectable to a power grid and having a shaft; an exciter machine coupled to the doubly fed induction generator shaft; and a power conversion system isolated from the grid and electrically connected to a rotor of the doubly fed induction generator and to the exciter machine to control the doubly fed induction generator.
Claim 2
Dependent Claim
84 words
A variable speed wind turbine system comprising: a first rotor shaft including at least one blade; a doubly fed induction generator coupled to the first rotor shaft and having a stator connectable to a power grid and having a shaft; an exciter machine coupled to the doubly fed induction generator shaft; and a power conversion system isolated from the grid and electrically connected to a rotor of the doubly fed induction generator and to the exciter machine to control the doubly fed induction generator.
Claim 3
Dependent Claim
25 words
The variable speed wind turbine of claim 1 , further comprising a power control system to control wind turbine power output delivered to the grid.
Claim 4
Dependent Claim
21 words
The variable speed wind turbine of claim 1 , further comprising a pitch controller to limit demanded power to the exciter.
Claim 5
Dependent Claim
18 words
The variable speed wind turbine of claim 1 , wherein the generator is a non-slip ring induction generator.
Claim 6
Dependent Claim
17 words
The variable speed wind turbine of claim 1 , wherein the exciter is a reversible electrical machine.
Claim 7
Dependent Claim
16 words
The variable speed wind turbine of claim 1 , wherein the exciter is a synchronous machine.
Claim 8
Dependent Claim
16 words
The variable speed wind turbine of claim 1 , wherein the exciter is an asynchronous machine.
Claim 9
Dependent Claim
16 words
The variable speed wind turbine of claim 1 , wherein the exciter is a DC machine.
Claim 10
Dependent Claim
63 words
The variable speed wind turbine of claim 1 , wherein the power conversion system comprises two active electronic power converters joined by a DC link Bus with an AC side of one of the active power converter connected to the rotor circuit of the doubly fed induction generator and the AC side of the other active power converter connected to the exciter machine.
Claim 11
Dependent Claim
23 words
The variable speed wind turbine of claim 1 , wherein the power conversion system is a bi-directional power converter isolated from the grid.
Claim 12
Dependent Claim
21 words
The variable speed wind turbine of claim 1 , wherein the power conversion system is a cycloconverter isolated from the grid.
Claim 13
Dependent Claim
22 words
The variable speed wind turbine of claim 1 , wherein the power conversion system is a matrix converter isolated from the grid.
Claim 14
Dependent Claim
25 words
The variable speed wind turbine of claim 1 wherein the control of the doubly fed induction generator is based on the grid flux orientation (GFO).
Claim 15
Dependent Claim
23 words
The variable speed wind turbine of claim 1 wherein the control of the exciter machine is based on the DC Bus voltage regulation.
Claim 16
Dependent Claim
101 words
A variable speed wind turbine system comprising: a rotor including at least one blade; a drive train coupled to the rotor, the drive train including at least one doubly fed induction generator (DFIG), said DFIG having a stator connectable to a power grid; exciter machine means for consuming power generated in a rotor of the DFIG in super-synchronous mode and for generating power for the rotor of the DFIG in sub-synchronous mode and coupled to the drive train; a power conversion means isolated from the grid for converting power transferred between the rotor of the DFIG and the exciter machine means.
Claim 17
Dependent Claim
101 words
A variable speed wind turbine system comprising: a rotor including at least one blade; a drive train coupled to the rotor, the drive train including at least one doubly fed induction generator (DFIG), said DFIG having a stator connectable to a power grid; exciter machine means for consuming power generated in a rotor of the DFIG in super-synchronous mode and for generating power for the rotor of the DFIG in sub-synchronous mode and coupled to the drive train; a power conversion means isolated from the grid for converting power transferred between the rotor of the DFIG and the exciter machine means.
Claim 18
Dependent Claim
23 words
The variable speed wind turbine of claim 15 further comprising: a power control means for controlling wind turbine power output delivered to grid.
Claim 19
Dependent Claim
18 words
The variable speed wind turbine of claim 15 further comprising: a pitch control means for performing pitch regulation.
Claim 20
Independent Claim
94 words
A method for a variable speed wind turbine comprising: converting wind energy into mechanical power by driving a rotor; converting mechanical power into electrical power utilising a doubly fed induction generator (DFIG) in a drive train. supplying power to a power grid from a stator of the DFIG; using an exciter machine coupled to the drive train and a power conversion system isolated from the power grid to receive power generated by a rotor of the doubly fed induction generator or to provide power required by the rotor of the doubly fed induction generator.
Claim 21
Independent Claim
94 words
A method for a variable speed wind turbine comprising: converting wind energy into mechanical power by driving a rotor; converting mechanical power into electrical power utilising a doubly fed induction generator (DFIG) in a drive train. supplying power to a power grid from a stator of the DFIG; using an exciter machine coupled to the drive train and a power conversion system isolated from the power grid to receive power generated by a rotor of the doubly fed induction generator or to provide power required by the rotor of the doubly fed induction generator.
Claim 22
Dependent Claim
18 words
The method of claim 18 further comprising controlling the stator power supply based on grid flux orientation (GFO).
Claim 23
Dependent Claim
20 words
The method of claim 18 further comprising controlling the power of the exciter machine based on DC Bus voltage regulation.
Claim 24
Dependent Claim
26 words
The method of claim 18 wherein the rotor receives power from the exciter machine when the doubly fed induction generator is operating in a sub-synchronous mode.
Claim 25
Dependent Claim
26 words
The method of claim 18 wherein the rotor provides power to the exciter machine when the doubly fed induction generator is operating in a super-synchronous mode.
Claim 26
Dependent Claim
93 words
A variable speed wind turbine comprising: a rotor including at least one blade; a drive train coupled to the rotor, the drive train including at least a doubly fed induction generator (DFIG), said DFIG having at least a stator connectable to a power grid; at least an exciter machine coupled to the drive train; and at least a power conversion device isolated from the grid and electrically coupled to a rotor of the doubly fed induction generator and to the exciter machine to transfer electrical power between the rotor and the exciter machine.
Claim 27
Dependent Claim
93 words
A variable speed wind turbine comprising: a rotor including at least one blade; a drive train coupled to the rotor, the drive train including at least a doubly fed induction generator (DFIG), said DFIG having at least a stator connectable to a power grid; at least an exciter machine coupled to the drive train; and at least a power conversion device isolated from the grid and electrically coupled to a rotor of the doubly fed induction generator and to the exciter machine to transfer electrical power between the rotor and the exciter machine.
Claim 28
Dependent Claim
25 words
The variable speed wind turbine of claim 23 , further comprising a power control system to control wind turbine power output delivered to the grid.
Claim 29
Dependent Claim
21 words
The variable speed wind turbine of claim 23 , further comprising a pitch controller to limit demanded power to the exciter.
Claim 30
Dependent Claim
18 words
The variable speed wind turbine of claim 23 , wherein the generator is a non-slip ring induction generator.
Claim 31
Dependent Claim
17 words
The variable speed wind turbine of claim 23 , wherein the exciter is a reversible electrical machine.
Claim 32
Dependent Claim
16 words
The variable speed wind turbine of claim 23 , wherein the exciter is a synchronous machine.
Claim 33
Dependent Claim
16 words
The variable speed wind turbine of claim 23 , wherein the exciter is an asynchronous machine.
Claim 34
Dependent Claim
16 words
The variable speed wind turbine of claim 23 , wherein the exciter is a DC machine.
Claim 35
Dependent Claim
63 words
The variable speed wind turbine of claim 23 , wherein the power conversion system comprises two active electronic power converters joined by a DC link Bus with an AC side of one of the active power converter connected to the rotor circuit of the doubly fed induction generator and the AC side of the other active power converter connected to the exciter machine.
Claim 36
Dependent Claim
23 words
The variable speed wind turbine of claim 23 , wherein the power conversion system is a bi-directional power converter isolated from the grid.
Claim 37
Dependent Claim
21 words
The variable speed wind turbine of claim 23 , wherein the power conversion system is a cycloconverter isolated from the grid.
Claim 38
Dependent Claim
22 words
The variable speed wind turbine of claim 23 , wherein the power conversion system is a matrix converter isolated from the grid.
Claim 39
Dependent Claim
25 words
The variable speed wind turbine of claim 23 wherein the control of the doubly fed induction generator is based on the grid flux orientation (GFO).
Claim 40
Dependent Claim
22 words
The variable speed wind turbine of claim 23 wherein control of the exciter machine is based on the DC Bus voltage regulation.
References Cited (Backward Citations)
US3122696A
Cited
US4305001A
Cited
US4297076A
Cited
SU1171952A1
Cited
US4701691A
Cited
US4994684A
Cited
US5083039A
Cited
US5225712A
Cited
US5083039B1
Cited
US5798631A
Cited
US6072303A
Cited
US6137187A
Cited
US6847128B2
Cited
US6856039B2
Cited
US6600240B2
Cited
US20050253396A1
Cited
DE19739164A1
Cited
US6420795B1
Cited
US6566764B2
Cited
US6856038B2
Cited
US7071581B2
Cited
US6741059B2
Cited
US6448735B1
Cited
EP1286048A1
Cited
WO2003058789A1
Cited
US7102247B2
Cited
US6853094B2
Cited
US6856041B2
Cited
US20030151259A1
Cited
US20040222642A1
Cited
US6933625B2
Cited
US6856040B2
Cited
US20040217595A1
Cited
US20040217594A1
Cited
US20060163881A1
Cited
WO2004040748A1
Cited
US6921985B2
Cited
US20060238929A1
Cited
WO2004070936A1
Cited
US20070007769A1
Cited
WO2004098261A2
Cited
US20050012339A1
Cited
US7042110B2
Cited
US20050122083A1
Cited
WO2004107556A1
Cited
US20060192390A1
Cited
WO2005015012A1
Cited
WO2005027301A1
Cited
CA2537999A1
Cited
US7095133B2
Cited
GB2410386A
Cited
GB2411252A
Cited
WO2005099063A1
Cited
US7038330B2
Cited
WO2006069569A1
Cited
US20060267560A1
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 2011-09-16 | 2012-03-17 | 2012-09-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2015-09-16 | 2016-03-17 | 2016-09-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2019-09-16 | 2020-03-17 | 2020-09-16 | $7700.00 | Window Closed / Lapsed |