US6600240B2
Expired / Lapsed
US
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Variable speed wind turbine generator
Assignee: General Electric Co
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Filing: 2002-02-05
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Granted: 2003-07-29
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Expires: 2022-02-05
Abstract
Abstract A variable speed system for use in systems, such as, for example, wind turbines, is described. The system comprises a wound rotor induction generator, a torque controller and a proportional, integral derivative (PID) pitch controller. The torque controller controls generator torque using field oriented control, and the PID controller performs pitch regulation based on generator rotor speed.
Inventors
- 👤 Amir S. Mikhail
- 👤 Craig L. Christenson
- 👤 Kevin L. Cousineau
- 👤 William L. Erdman
- 👤 William E. Holley
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 01:01
CPC Classifications
F; F03; F03D; F03D7/00; F03D7/02; F03D7/0276; F03D7/022; F03D7/0224; F03D7/0272; F03D7/04; F03D7/042; F03D7/043; F03D7/044; F03D9/00; F03D9/20; F03D9/25; H; H02; H02P; H02P9/00; H02P9/007; H02P9/04; H02P9/14; H02P9/26; H02P9/30; H02P9/42; F05; F05B; F05B2270/00; F05B2270/10; F05B2270/103; F05B2270/1032; F05B2270/30; F05B2270/327; F05B2270/70; F05B2270/705; F05B2270/706; H02P2101/00; H02P2101/15; Y; Y02; Y02E; Y02E10/00; Y02E10/70; Y02E10/72
Claims Analysis
Total Claims: 32
Claim 1
Independent Claim
55 words
A synchronization process for a variable speed system having a generator, said process comprising: connecting a generator stator at a first generator speed; connecting a generator rotor at a second generator speed higher than the first generator speed when rotor voltage is at a first voltage; ramping up a rotor current; and regulating generator torque.
Claim 2
Dependent Claim
55 words
A synchronization process for a variable speed system having a generator, said process comprising: connecting a generator stator at a first generator speed; connecting a generator rotor at a second generator speed higher than the first generator speed when rotor voltage is at a first voltage; ramping up a rotor current; and regulating generator torque.
Claim 3
Dependent Claim
21 words
The process defined in claim 1 wherein regulating generator torque comprises enabling a rotor side converter and gating rotor side IGBTs.
Claim 4
Dependent Claim
23 words
The process defined in claim 1 wherein regulating generator torque comprises creating a current vector that is able to produce the desired torque.
Claim 5
Dependent Claim
15 words
The process defined in claim 1 wherein the generator comprises a wound rotor induction generator.
Claim 6
Dependent Claim
14 words
The process defined in claim 1 wherein the generator comprises a doubly fed generator.
Claim 7
Independent Claim
63 words
An apparatus for a variable speed system having a generator, said apparatus comprising: means for connecting a generator stator at a first generator speed; means for connecting a generator rotor at a second generator speed higher than the first generator speed and when rotor voltage is at a first voltage; means for ramping up a rotor current; and means for regulating generator torque.
Claim 8
Independent Claim
63 words
An apparatus for a variable speed system having a generator, said apparatus comprising: means for connecting a generator stator at a first generator speed; means for connecting a generator rotor at a second generator speed higher than the first generator speed and when rotor voltage is at a first voltage; means for ramping up a rotor current; and means for regulating generator torque.
Claim 9
Dependent Claim
28 words
The apparatus defined in claim 6 , wherein means for regulating generator torque comprises means for enabling a rotor side converter and means for gating rotor side IGBTs.
Claim 10
Dependent Claim
27 words
The apparatus defined in claim 6 wherein means for regulating generator torque comprises means for creating a current vector that is able to produce the desired torque.
Claim 11
Dependent Claim
16 words
The apparatus defined in claim 6 , wherein the generator comprises a wound rotor induction generator.
Claim 12
Dependent Claim
15 words
The apparatus defined in claim 6 , wherein the generator comprises a doubly fed generator.
Claim 13
Independent Claim
69 words
A system comprising: a wound rotor induction generator having a generator stator and a generator rotor; and a torque controller coupled to the generator to regulate generator torque, wherein the generator stator operates at a first generator speed, wherein the generator rotor operates at a second generator speed higher than the first generator speed when rotor voltage is at a first voltage, and wherein a rotor current ramped up.
Claim 14
Independent Claim
69 words
A system comprising: a wound rotor induction generator having a generator stator and a generator rotor; and a torque controller coupled to the generator to regulate generator torque, wherein the generator stator operates at a first generator speed, wherein the generator rotor operates at a second generator speed higher than the first generator speed when rotor voltage is at a first voltage, and wherein a rotor current ramped up.
Claim 15
Dependent Claim
24 words
The system defined in claim 11 , wherein the generator torque is regulated by enabling a rotor side converter and gating rotor side IGBTs.
Claim 16
Dependent Claim
23 words
The system defined in claim 11 , wherein the generator torque is regulated by generating a current vector to produce a desired torque.
Claim 17
Dependent Claim
13 words
The system defined in claim 11 , further comprising a doubly fed generator.
Claim 18
Independent Claim
96 words
A system comprising: a wound rotor induction generator having a generator stator and a generator rotor; a torque controller coupled to the generator to control generator torque using field oriented control; and a pitch controller coupled to the generator to perform pitch regulation based on generator rotor speed and operating independently of the torque controller, wherein the generator stator operates at a first generator speed, wherein the generator rotor operates at a second generator speed higher than the first generator speed when rotor voltage is at a first voltage, and wherein a rotor current ramped up.
Claim 19
Independent Claim
96 words
A system comprising: a wound rotor induction generator having a generator stator and a generator rotor; a torque controller coupled to the generator to control generator torque using field oriented control; and a pitch controller coupled to the generator to perform pitch regulation based on generator rotor speed and operating independently of the torque controller, wherein the generator stator operates at a first generator speed, wherein the generator rotor operates at a second generator speed higher than the first generator speed when rotor voltage is at a first voltage, and wherein a rotor current ramped up.
Claim 20
Dependent Claim
18 words
The system defined in claim 15 wherein the pitch controller comprises a proportional, integral derivative (PID) pitch controller.
Claim 21
Dependent Claim
18 words
The system defined in claim 15 , wherein the pitch controller comprises a proportional, integral (PI) pitch controller.
Claim 22
Dependent Claim
18 words
The system defined in claim 15 , wherein the pitch controller comprises a proportional, derivative (PD) pitch controller.
Claim 23
Dependent Claim
15 words
The system defined in claim 15 , wherein the pitch controller comprises a Lag-Lead controller.
Claim 24
Dependent Claim
15 words
The system defined in claim 15 , wherein the pitch controller comprises a Lead-Lag controller.
Claim 25
Dependent Claim
20 words
The system defined in claim 15 , where the pitch controller comprises an open loop controller with a derivative term.
Claim 26
Dependent Claim
19 words
The system defined in claim 15 , wherein the wound rotor induction generator comprises a non-slip ring induction generator.
Claim 27
Dependent Claim
30 words
The system defined in claim 15 , wherein the torque controller comprises a dampening filter to reduce commanded torque based on detected oscillation motion between turbine blades and the generator.
Claim 28
Independent Claim
93 words
A system comprising: a wound rotor induction generator having a generator stator and a generator rotor; a torque controller coupled to the generator to control generator torque using field oriented control; and a proportional, integral derivative (PD) pitch controller coupled to the generator to perform pitch regulation based on generator rotor speed, wherein the generator stator operates at a first generator speed, wherein the generator rotor operates at a second generator speed higher than the first generator speed when rotor voltage is at a first voltage, and wherein a rotor current ramped up.
Claim 29
Independent Claim
93 words
A system comprising: a wound rotor induction generator having a generator stator and a generator rotor; a torque controller coupled to the generator to control generator torque using field oriented control; and a proportional, integral derivative (PD) pitch controller coupled to the generator to perform pitch regulation based on generator rotor speed, wherein the generator stator operates at a first generator speed, wherein the generator rotor operates at a second generator speed higher than the first generator speed when rotor voltage is at a first voltage, and wherein a rotor current ramped up.
Claim 30
Dependent Claim
19 words
The system defined in claim 24 , wherein the wound rotor induction generator comprises a non-slip ring induction generator.
Claim 31
Dependent Claim
23 words
The system defined in claim 24 , wherein the power controller controls the generator power and torque as a function of generator speed.
Claim 32
Dependent Claim
33 words
The system defined in claim 24 , wherein the power controller controls the generator power from a power look up table (LUT) as a function of generator speed using field oriented control (FOC).
References Cited (Backward Citations)
US4906060A
Cited
US5652485A
Cited
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