WO2005119857A1 - Dispositif de transfert de courant pour eolienne - Google Patents

Dispositif de transfert de courant pour eolienne Download PDF

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Publication number
WO2005119857A1
WO2005119857A1 PCT/EP2005/052292 EP2005052292W WO2005119857A1 WO 2005119857 A1 WO2005119857 A1 WO 2005119857A1 EP 2005052292 W EP2005052292 W EP 2005052292W WO 2005119857 A1 WO2005119857 A1 WO 2005119857A1
Authority
WO
WIPO (PCT)
Prior art keywords
wind power
power plant
transmission device
rotor
liquid metal
Prior art date
Application number
PCT/EP2005/052292
Other languages
German (de)
English (en)
Inventor
Lars Lauer
Norman Perner
Theodor Salzmann
Original Assignee
Siemens Aktiengesellschaft
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Siemens Aktiengesellschaft filed Critical Siemens Aktiengesellschaft
Publication of WO2005119857A1 publication Critical patent/WO2005119857A1/fr

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Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01R—ELECTRICALLY-CONDUCTIVE CONNECTIONS; STRUCTURAL ASSOCIATIONS OF A PLURALITY OF MUTUALLY-INSULATED ELECTRICAL CONNECTING ELEMENTS; COUPLING DEVICES; CURRENT COLLECTORS
    • H01R39/00—Rotary current collectors, distributors or interrupters
    • H01R39/02—Details for dynamo electric machines
    • H01R39/18—Contacts for co-operation with commutator or slip-ring, e.g. contact brush
    • H01R39/30—Liquid contacts
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F03—MACHINES OR ENGINES FOR LIQUIDS; WIND, SPRING, OR WEIGHT MOTORS; PRODUCING MECHANICAL POWER OR A REACTIVE PROPULSIVE THRUST, NOT OTHERWISE PROVIDED FOR
    • F03D—WIND MOTORS
    • F03D9/00—Adaptations of wind motors for special use; Combinations of wind motors with apparatus driven thereby; Wind motors specially adapted for installation in particular locations
    • F03D9/20—Wind motors characterised by the driven apparatus
    • F03D9/25—Wind motors characterised by the driven apparatus the apparatus being an electrical generator
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01R—ELECTRICALLY-CONDUCTIVE CONNECTIONS; STRUCTURAL ASSOCIATIONS OF A PLURALITY OF MUTUALLY-INSULATED ELECTRICAL CONNECTING ELEMENTS; COUPLING DEVICES; CURRENT COLLECTORS
    • H01R39/00—Rotary current collectors, distributors or interrupters
    • H01R39/64—Devices for uninterrupted current collection
    • H01R39/646—Devices for uninterrupted current collection through an electrical conductive fluid
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02K—DYNAMO-ELECTRIC MACHINES
    • H02K13/00—Structural associations of current collectors with motors or generators, e.g. brush mounting plates or connections to windings; Disposition of current collectors in motors or generators; Arrangements for improving commutation
    • H02K13/003—Structural associations of slip-rings
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
    • Y02E10/00—Energy generation through renewable energy sources
    • Y02E10/70—Wind energy
    • Y02E10/72—Wind turbines with rotation axis in wind direction

Definitions

  • the invention relates to a wind power plant with a wind power generator that has a stator and a rotor and with a current transmission device for at least temporarily feeding a winding of the rotor.
  • Slip ring arrangements are used for the current transmission between the fixed and rotating part of a rotating electrical machine.
  • the magnet wheels and turbo rotor receive two slip rings for direct current transmission.
  • Induction machines with slip ring rotors receive two or three slip rings depending on the type of current.
  • Each ring is provided with a secure electrical connection for the winding of the rotor and is positioned together with the other rings on a support body. In any case, the slip rings must be insulated against each other and against the supporting body.
  • the power supply lines must also have reliable insulation.
  • Power is essentially transferred via brushes. This leads to brush wear, which also results in electrically conductive dust deposits that get into the engine compartment and can therefore lead to damage. As a result of this brush wear, a regular brush change must also be provided.
  • the asynchronous machine can also be equipped with a slip transformer. It consists of a fixed primary part and a rotating secondary part, each with circular laminated cores, in which circular coils are embedded.
  • the slip transformer transmits the slip power without generating any torque. This means that the operating behavior of the asynchronous machine does not change with the slip transformer. With an appropriate frequency converter, you get the same operating behavior as with the conventionally double-fed asynchronous machine.
  • the following properties are particularly important and to be assessed for wind turbines, especially if they are also to be used off-shore: reliability, low maintenance, dimensions and weight, transport and assembly, costs of the electrical energy converter system in comparison to the total costs and grid compatibility.
  • the invention is therefore based on the object of providing reliable and low-maintenance power transmission to a rotor of a wind power plant without providing an additional total outlay in terms of material and weight.
  • the problem is solved by a wind power plant with a wind power generator which has a stator and a rotor and with a current transmission device for at least temporarily feeding a winding of the rotor, the current flowing through the winding of the rotor
  • Liquid metal alloys is transferred from a fixed to a rotating part.
  • Liquid metal alloys achieve comparatively higher current densities. Furthermore, an uneven current distribution and the associated higher electrical losses through the liquid metal alloy are avoided. With liquid metal alloys of this type, even at high contact speeds, larger current intensities can be transmitted than with the known sliding contacts.
  • the liquid metal alloy can also be held by capillary action of the gap between the current transfer surfaces.
  • the design effort to keep the liquid metal alloy in the area of the current transmission surfaces of the fixed and rotating part is eliminated.
  • the capillary action is advantageously achieved by wetting the side of the current transmission surfaces facing the liquid metal alloy.
  • materials such as molybdenum are used.
  • the capillary effect can also be achieved by shaping the current transmission surfaces by reducing the gap width in the respective outer regions of the current transmission surfaces.
  • the capillary effect is thus influenced by the chemical composition of the liquid metal alloy, the geometry of the gap and the nature of the surface material.
  • the power transmission device has power transmission surfaces which are arranged axially one behind the other and are electrically isolated from one another. Each sub-arrangement is provided for the transmission of one phase.
  • the current transmission surfaces assigned to the respective phases are to be galvanically separated from one another by suitable means in order to avoid short circuits.
  • a current transmission device is advantageously constructed in a modular manner, a module representing a partial arrangement, a current transmission surface or an insulation washer, so that in order to obtain the entire current transmission device, by axially arranging these modules on a support body, a current transmission device that is particularly suitable for wind power plants in particular is created.
  • Insulation rings are advantageously used as insulation between the individual current transmission surfaces.
  • heating or cooling the liquid alloy are to be provided in order to ensure optimal operation of the power transmission device of the wind power plant.
  • Correspondingly adapted heating coils or cooling coils in the liquid alloy or in the adjacent parts can be provided as heating. It is also possible to heat the liquid alloy only temporarily, and as soon as the unusual operating state is no longer present, this heating and / or cooling can be switched off.
  • Galium, indium, tin or selenium compounds have proven to be particularly advantageous liquid metal alloys.
  • a particularly simple and maintenance-friendly arrangement results if the power transmission device of the wind turbine can be used at ambient pressure.
  • the oxidation effects of the liquid metal that occur can be avoided, inter alia, by the power transmission device operating in a protective gas atmosphere.
  • a further possibility of operating the power transmission device of the wind power plant is under overpressure or underpressure, as a result of which possible oxidation can also be reduced.
  • the power transmission device is sealed off from the atmosphere on the basis of magnetically conductive liquids, such as Ferrofluids.
  • magnetically conductive liquids such as Ferrofluids.
  • mechanical sealing devices such as brush seals or radial shaft service rings are also suitable for sealing.
  • FIG. 3 shows a double-fed asynchronous generator
  • FIG. 4 shows an asynchronous generator with switched rotor resistors
  • FIG. 1 shows a schematically illustrated power transmission device 20 of a wind power plant with fixed, electrically and electrically insulating outer parts.
  • the electrically conductive outer parts 1 are advantageously galvanically separated from one another by insulating washers 4, so that short circuits between the phases of the fixed outer parts 1 are avoided.
  • Rotating inner parts 2 and 5 correspond to the fixed outer parts 1 and 4, so that a current transmission between outer part 1 and interior Part 2 can be done via a liquid metal alloy 3.
  • the current transmitted to the rotating inner parts 2 is, as not shown in detail, passed on to the respective windings of a rotor 6 via feed lines.
  • the rotating inner parts 2 and 5 are mounted on a shaft 21 in a rotationally fixed manner.
  • the geometry of the gap determines, among other things, the magnitude of the force F which is directed into the interior of the liquid metal alloy 3.
  • Adhesive force FA is the force that acts on the liquid metal alloy 3 from the surface of the insulating disks 4, 5.
  • a cohesive force FK is a cohesive force that acts within the liquid metal alloy 3 between the individual molecules of the liquid metal alloy 3.
  • FIG. 3 shows a wind turbine 22 shown in principle with a double-fed asynchronous generator 7.
  • the wind turbine is essentially formed by a wind propeller 8 and a downstream gear 9 and an optimal clutch 10, via which the rotor 6 of the asynchronous generator 7 is driven.
  • the stator winding of this generator is connected to the network to be fed, a transformer (not shown) for voltage adjustment may also be present.
  • the static frequency converter 11 for feeding the rotor winding via the slip ring body 20 can be an intermediate circuit converter, preferably with a voltage intermediate circuit, as well as a direct converter or matrix converter.
  • FIG. 4 shows a wind power plant shown in principle with an asynchronous generator 7 with switched rotor resistors 12, in particular the connections of a winding of the rotor 6 (not shown in detail) are led out via a current transmission device 20.
  • the resistors and switches, electro-mechanical switches or electronic tyristor switches are arranged externally.
  • FIG. 5 shows a wind power plant shown in principle with a synchronous generator 13 with DC excitation.
  • the stator winding is connected to the network to be fed via a frequency converter 11.
  • the connections of the field winding of the rotor 6 are led out via current transmission device 20.
  • the adjustment or modification of the excitation current takes place, for example, via an external f controllable rectifier fourteenth
  • the power transmission device 20 represents a completely uninterruptible, EMC-insensitive and interference-free transmission path, so there are no disruptive influences on other system components, which results in an additional increase in operational reliability and availability. Control processes that work with arbitrarily modulated voltages and currents superimposed on the energy transfer variables (current and voltage) are also not affected.
  • the power transmission device 20 also takes over storage functions for the fixed parts of the arrangement, so that a separate bearing arrangement is not necessary.
  • the liquid metal alloy 3 takes on storage properties and simultaneously transmits the electrical one
  • the seal can be based on magnetic liquids or other gases. It is crucial that there is no contact between the atmosphere and the liquid metal alloy 3.
  • the seal itself can be designed as a labyrinth seal, brush seal or radial shaft seal.
  • the current transmission device 20 according to the invention is also particularly suitable for high-temperature superconducting wind power generators.
  • the power transmission device for power transmission according to the invention can also be used for monitoring and Signals from sensors which may be attached to the rotor 6 are used.
  • both the power transmission, the storage and the transmission of sensor data take place via one or more power transmission devices.

Landscapes

  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Sustainable Development (AREA)
  • Sustainable Energy (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Wind Motors (AREA)
  • Control Of Eletrric Generators (AREA)

Abstract

L'invention concerne une éolienne équipée d'un générateur éolien (7, 13) comprenant un stator et un rotor (6) et d'un dispositif de transfert de courant (20) servant à alimenter au moins temporairement un enroulement du rotor (6), le courant de l'enroulement du rotor étant transféré d'une pièce fixe (1) à une pièce rotative (2) par l'intermédiaire d'alliages de métaux liquides (3).
PCT/EP2005/052292 2004-06-04 2005-05-18 Dispositif de transfert de courant pour eolienne WO2005119857A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102004027534.3 2004-06-04
DE102004027534A DE102004027534A1 (de) 2004-06-04 2004-06-04 Windkraftanlage

Publications (1)

Publication Number Publication Date
WO2005119857A1 true WO2005119857A1 (fr) 2005-12-15

Family

ID=34968479

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/EP2005/052292 WO2005119857A1 (fr) 2004-06-04 2005-05-18 Dispositif de transfert de courant pour eolienne

Country Status (2)

Country Link
DE (1) DE102004027534A1 (fr)
WO (1) WO2005119857A1 (fr)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2007147657A1 (fr) * 2006-06-22 2007-12-27 Siemens Aktiengesellschaft Machine-outil ou machine de production ou robot
EP3567247A1 (fr) * 2018-05-08 2019-11-13 Siemens Gamesa Renewable Energy A/S Connecteur électrique pour une éolienne
CN112959880A (zh) * 2021-03-31 2021-06-15 吉林大学 混动摩托车及其车辆驱动总成

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102006011256A1 (de) * 2006-03-10 2007-09-13 Siemens Ag Elektrische Maschine für explosionsgefährdete Bereiche
EP2146403B1 (fr) 2008-07-14 2012-04-25 Siemens Aktiengesellschaft Transmetteur

Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB857679A (en) * 1958-03-31 1961-01-04 Ass Elect Ind Improvements relating to electrical connections between relatively rotating electrical conductors
GB1393888A (en) * 1971-05-04 1975-05-14 Int Research & Dev Co Ltd Electrical machines having a liquid metal current transfer device
DE2416765A1 (de) * 1974-04-05 1975-10-23 Siemens Ag Elektrische kontakteinrichtung mit einer kontaktfluessigkeit
US4047063A (en) * 1974-12-16 1977-09-06 The General Electric Company Limited Liquid metal slip-ring arrangement for a dynamo electric machine
FR2463986A1 (fr) * 1979-08-23 1981-02-27 Electricite De France Dispositif de transmission de courant a contacts glissants par metal liquide
US4628221A (en) * 1985-10-15 1986-12-09 Young Niels O Homopolar motor with pressurized liquid metal contact
US6737757B1 (en) * 1999-06-04 2004-05-18 Bonus Energy A/S Wind power plant and method for operating it
DE10360548A1 (de) * 2003-12-22 2005-07-21 Siemens Ag Schleifringanordnung

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2832910A (en) * 1956-11-05 1958-04-29 Allis Chalmers Mfg Co Insulation for air gap of unipolar generator
ES343230A1 (es) * 1966-08-29 1968-08-16 Gen Electric Una maquina dinamoelectrica.
US3870914A (en) * 1971-06-28 1975-03-11 Alan J Walker Current collection means for electric motors
US5975536A (en) * 1997-09-30 1999-11-02 Rigaku/Usa, Inc. Rotary motion feedthrough with rotating magnet system
DE19801803A1 (de) * 1998-01-19 1999-04-29 Siemens Ag Elektrische Rotationsmaschine und Verfahren zur Übertragung elektrischer Leistung

Patent Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB857679A (en) * 1958-03-31 1961-01-04 Ass Elect Ind Improvements relating to electrical connections between relatively rotating electrical conductors
GB1393888A (en) * 1971-05-04 1975-05-14 Int Research & Dev Co Ltd Electrical machines having a liquid metal current transfer device
DE2416765A1 (de) * 1974-04-05 1975-10-23 Siemens Ag Elektrische kontakteinrichtung mit einer kontaktfluessigkeit
US4047063A (en) * 1974-12-16 1977-09-06 The General Electric Company Limited Liquid metal slip-ring arrangement for a dynamo electric machine
FR2463986A1 (fr) * 1979-08-23 1981-02-27 Electricite De France Dispositif de transmission de courant a contacts glissants par metal liquide
US4628221A (en) * 1985-10-15 1986-12-09 Young Niels O Homopolar motor with pressurized liquid metal contact
US6737757B1 (en) * 1999-06-04 2004-05-18 Bonus Energy A/S Wind power plant and method for operating it
DE10360548A1 (de) * 2003-12-22 2005-07-21 Siemens Ag Schleifringanordnung

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2007147657A1 (fr) * 2006-06-22 2007-12-27 Siemens Aktiengesellschaft Machine-outil ou machine de production ou robot
US7997905B2 (en) 2006-06-22 2011-08-16 Siemens Aktiengesellschaft Machine tool or production machine or robot
EP3567247A1 (fr) * 2018-05-08 2019-11-13 Siemens Gamesa Renewable Energy A/S Connecteur électrique pour une éolienne
CN112959880A (zh) * 2021-03-31 2021-06-15 吉林大学 混动摩托车及其车辆驱动总成
CN112959880B (zh) * 2021-03-31 2022-06-24 吉林大学 混动摩托车及其车辆驱动总成

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Publication number Publication date
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