US7276807B2
Expired / Lapsed
US
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Wind turbine dump load system and method
Assignee: GE Vernova Infrastructure Technology LLC
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Filing: 2006-01-19
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Granted: 2007-10-02
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Expires: 2026-01-19
Abstract
Abstract A wind turbine braking system including: a wind turbine including turbine blades and a control system; a generator coupled to the turbine blades; a generator converter coupled to the generator and connectable to a utility power grid; at least one dump resistor coupled to the generator and generator converter, and if the utility power grid losses power, the dump resistor applying an electrical load to the generator converter.
Inventors
- 👤 Henning Luetze
- 👤 Thomas Edenfeld
- 👤 Peter Gauchel
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 10:14
CPC Classifications
H; H02; H02H; H02H7/00; H02H7/06; H02H7/067; F; F03; F03D; F03D7/00; F03D7/02; F03D7/028; F03D7/0284; F03D7/0288; F05; F05B; F05B2260/00; F05B2260/90; F05B2260/903; F05B2270/00; F05B2270/10; F05B2270/101; F05B2270/1011; F05B2270/107; F05B2270/1071; F05B2270/30; F05B2270/337; H02P; H02P3/00; H02P3/06; H02P3/18; H02P3/22; H02P9/00; H02P9/10; Y; Y02; Y02E; Y02E10/00; Y02E10/70; Y02E10/72
Claims Analysis
Total Claims: 23
Claim 1
Independent Claim
67 words
A wind turbine system comprising: a wind turbine including turbine blades and a control system; a generator coupled to the turbine blades; a generator converter coupled to the generator and connectable to a utility power grid; at least one dump resistor coupled to the generator and generator converter, and if the utility power grid losses power, the dump resistor applies an electrical load to the generator converter.
Claim 2
Dependent Claim
67 words
A wind turbine system comprising: a wind turbine including turbine blades and a control system; a generator coupled to the turbine blades; a generator converter coupled to the generator and connectable to a utility power grid; at least one dump resistor coupled to the generator and generator converter, and if the utility power grid losses power, the dump resistor applies an electrical load to the generator converter.
Claim 3
Dependent Claim
35 words
The system of claim 1 , wherein the at least one dump resistor further comprises a bank of multiple resistors and a thyristor bridge to switchably connect the bank to the generator and generator converter.
Claim 4
Dependent Claim
40 words
The system of claim 1 wherein the at least one dump resistor further comprises a plurality of banks of multiple resistors connected in parallel, wherein one or more of the banks are switchably connected to the generator and generator converter.
Claim 5
Dependent Claim
27 words
The system of claim 1 wherein the dump resistor is connected to the generator and in parallel with a connector for the generator and the generator converter.
Claim 6
Dependent Claim
16 words
The system of claim 1 where in the dump resistor is a plurality of dump resistors.
Claim 7
Dependent Claim
40 words
The system of claim 1 wherein the utility power grid includes main contactors, and wherein the control system is applied to detect a loss of power in the utility power grid by sensing an undervoltage or out of frequency condition.
Claim 8
Dependent Claim
54 words
A wind turbine energy dissipation system comprising: a connector adapted to couple a wind turbine generator and a generator converter; a dump load resistor coupled to the connector, and a grid loss detector configured to command the connector to couple the dump load resistor to the generator in the event of a grid loss.
Claim 9
Dependent Claim
54 words
A wind turbine energy dissipation system comprising: a connector adapted to couple a wind turbine generator and a generator converter; a dump load resistor coupled to the connector, and a grid loss detector configured to command the connector to couple the dump load resistor to the generator in the event of a grid loss.
Claim 10
Dependent Claim
29 words
The wind turbine energy dissipation system of claim 7 wherein the dump load resistor is in parallel to the connector and is coupled to the generator and generator converter.
Claim 11
Dependent Claim
21 words
The wind turbine energy dissipation system of claim 7 wherein the dump load resistor is a plurality of dump load resistors.
Claim 12
Dependent Claim
27 words
The wind turbine energy dissipation system of claim 7 wherein the grid loss detector is a programmable logic circuit and the connector is a thyristor bridge switch.
Claim 13
Dependent Claim
27 words
The wind turbine energy dissipation system of claim 7 further comprising an energy storage device also connected to the generator in the event of the grid loss.
Claim 14
Dependent Claim
33 words
The wind turbine energy dissipation system of claim 7 wherein the grid loss detector detects a loss of power in the utility power grid by sensing an undervoltage or out of frequency condition.
Claim 15
Dependent Claim
20 words
The wind turbine energy dissipation system of claim 7 wherein the dump load resistor is permanently connected to the connector.
Claim 16
Independent Claim
65 words
A method for a wind turbine coupled to a utility power grid, the method comprising: applying a dump load resistor to the wind turbine upon loss of power from the utility power grid; sensing a grid loss condition, and upon sensing the gird loss condition, dissipating power from rotational inertia of the wind turbine to the dump resistor via a generator and a generator converter.
Claim 17
Independent Claim
65 words
A method for a wind turbine coupled to a utility power grid, the method comprising: applying a dump load resistor to the wind turbine upon loss of power from the utility power grid; sensing a grid loss condition, and upon sensing the gird loss condition, dissipating power from rotational inertia of the wind turbine to the dump resistor via a generator and a generator converter.
Claim 18
Dependent Claim
29 words
The method of claim 14 further comprising applying the dump resistor load by arranging the dump load resistor in parallel with a connection of the generator and generator converter.
Claim 19
Dependent Claim
24 words
The method of claim 14 further comprising progressively increasing a resistance load of the dump load resistor by successively connecting resistors to the generator.
Claim 20
Dependent Claim
23 words
The method of claim 15 wherein the load is switched to the dump load resistor within 0.1 seconds of detecting the grid loss.
Claim 21
Dependent Claim
16 words
The method of claim 15 further comprising decelerating the wind turbine upon detecting a grid loss.
Claim 22
Dependent Claim
32 words
The method of claim 18 wherein the dump load resistor is applied immediately upon grid loss and is continuously applied at least until a rotational speed of the wind turbine is reduced.
Claim 23
Dependent Claim
25 words
The method of claim 15 wherein the grid loss is sensed by detecting an undervoltage condition or an out of frequency condition in the grid.
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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) | 2010-10-01 | 2011-04-02 | 2011-10-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2014-10-01 | 2015-04-02 | 2015-10-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2018-10-01 | 2019-04-02 | 2019-10-02 | $7700.00 | Window Closed / Lapsed |