§
Luxuse
Patent Intelligence
Sign In
← Back to Patent Explorer
US7291937B2 Expired / Lapsed US ⏱️ 0.0 years remaining

Operating method for a wind turbine with a supersynchronous cascade

Assignee: DeWind Co
•
Filing: 2002-09-10
•
Granted: 2007-11-06
•
Expires: 2022-09-10
📄 Original PDF 🌐 Google Patents 🔄 Sync Now

Abstract

Abstract The invention relates to a wind energy system having a rotor that can be driven by the wind, preferably having one or more rotor blades that can be adjusted in angle, a generator directly or indirectly connected with the rotor, to generate electric energy, which is configured as an asynchronous generator having a super-synchronous converter cascade in the rotor circuit, for slip-variable generator operation, so that power output of the generator is possible at variable speeds of rotation of the rotor, and an operation guide system that is configured to regulate the speed of rotation of the rotor, within a predetermined wind speed range. To improve the energy yield, it is provided that the super-synchronous rectifier cascade is configured in the rotor circuit for feeding the slip power into the network. For this purpose, the super-synchronous converter cascade has a DC voltage intermediate circuit having a high-set element. These are configured to switch, as IGBT switches, with a 180 degree phase shift relative to the rotor voltage. Furthermore, the invention relates to a method for regulating the power output of the wind energy system, in that the slip is regulated, whereby the slip power is fed into the network.

Inventors

  • 👤 Wolf Willisch
  • 👤 Robert Müller

Bibliographic Details

Application Number —
Jurisdiction US
Data Source google_patents
Last Synchronized 2026-10-31 21:56
CPC Classifications
F; F03; F03D; F03D9/00; F03D9/20; F03D9/25; F03D9/255; F03D7/00; F03D7/02; F03D7/0276; H; H02; H02J; H02J3/00; H02J3/38; H02J3/381; H02P; H02P9/00; H02P9/007; F05; F05B; F05B2260/00; F05B2260/70; F05B2260/74; F05B2270/00; F05B2270/10; F05B2270/1016; H02J2101/00; H02J2101/20; H02J2101/28; H02P2101/00; H02P2101/15; Y; Y02; Y02E; Y02E10/00; Y02E10/70; Y02E10/72; Y02E10/76

Claims Analysis

Total Claims: 12
Claim 1
Independent Claim 114 words
Wind energy system comprising a rotor that can be driven by the wind, having one or more rotor blades that can be adjusted in angle, a generator connected with the rotor, to generate electric energy, which is configured as an asynchronous generator having a super-synchronous converter cascade in the rotor circuit, for slip-variable generator operation, so that power output of the generator is possible at different speeds of rotation of the rotor, and an operation guide system that is configured to regulate the speed of rotation of the rotor, within a predetermined wind speed range, wherein the super-synchronous converter cascade is configured in the rotor circuit for feeding the slip power into the network.
Claim 2
Dependent Claim 114 words
Wind energy system comprising a rotor that can be driven by the wind, having one or more rotor blades that can be adjusted in angle, a generator connected with the rotor, to generate electric energy, which is configured as an asynchronous generator having a super-synchronous converter cascade in the rotor circuit, for slip-variable generator operation, so that power output of the generator is possible at different speeds of rotation of the rotor, and an operation guide system that is configured to regulate the speed of rotation of the rotor, within a predetermined wind speed range, wherein the super-synchronous converter cascade is configured in the rotor circuit for feeding the slip power into the network.
Claim 3
Dependent Claim 26 words
Wind energy system according to claim 1 , wherein the super-synchronous converter cascade has a DC voltage intermediate circuit that is configured as a high-set element.
Claim 4
Dependent Claim 27 words
Wind energy system according to claim 2 , wherein the high-set element is configured to switch at a frequency that is a multiple, of the network frequency.
Claim 5
Dependent Claim 15 words
Wind energy system according to claim 2 , wherein the high-set element has pulse-width modulation.
Claim 6
Dependent Claim 22 words
Wind energy system according to claim 2 , wherein the high-set element is configured to switch, with IGBT switches having variable frequency.
Claim 7
Dependent Claim 32 words
Wind energy system according to claim 5 , wherein the IGBT switches of the two high-set elements are configured to switch at a phase offset of 180 degrees relative to one another.
Claim 8
Dependent Claim 27 words
Wind energy system according to claim 1 , wherein the stator is configured to short-circuit at a low wind speed, and to cut off from the network.
Claim 9
Dependent Claim 27 words
Wind energy system according to claim 1 , wherein the generator is connected with the rotor selected from the group consisting of directly connected and indirectly connected.
Claim 10
Dependent Claim 38 words
Wind energy system according to claim 1 , wherein the operation guide system that is configured to regulate the speed of rotation of the rotor, within a predetermined wind speed range, with adjustment of the rotor blade angles.
Claim 11
Dependent Claim 31 words
Wind energy system according to claim 3 , wherein the high-set element is configured to switch at a frequency that is a multiple of 10× to 100× of the network frequency.
Claim 12
Dependent Claim 27 words
Wind energy system according to claim 7 , wherein the stator is configured to short-circuit at a low wind speed by way of a three-phase slip resistor.

References Cited (Backward Citations)

US4461957A Cited
US4906060A Cited
US5225712A Cited
US5798631A Cited
US6137187A Cited
DE19735742A1 Cited
DE19845569A1 Cited
US6784564B1 Cited
US6420795B1 Cited
US6566764B2 Cited
US6856038B2 Cited
US7095128B2 Cited
DE10117212A1 Cited
US6965174B2 Cited
WO2003026121A1 Cited

USPTO Annuity & Maintenance Windows

Annuity Stage Window Opens Payment Deadline Surcharge Period Until Estimated Fee Status
3.5 Years (Year 4) 2010-11-05 2011-05-07 2011-11-06 $2000.00 Window Closed / Lapsed
7.5 Years (Year 8) 2014-11-05 2015-05-07 2015-11-06 $3760.00 Window Closed / Lapsed
11.5 Years (Year 12) 2018-11-05 2019-05-07 2019-11-06 $7700.00 Window Closed / Lapsed

Assigned Categories & Tags

No categories assigned to this patent yet.

Assign Category Tag