Classifications

• • 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
  • F03D7/00—Controlling wind motors 
• • 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
  • F03D9/255—Wind motors characterised by the driven apparatus the apparatus being an electrical generator connected to electrical distribution networks; Arrangements therefor
  • F03D9/257—Wind motors characterised by the driven apparatus the apparatus being an electrical generator connected to electrical distribution networks; Arrangements therefor the wind motor being part of a wind farm
• • H—ELECTRICITY
  • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
  • H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
  • H02J3/00—Circuit arrangements for AC mains or AC distribution networks
  • H02J3/38—Arrangements for parallely feeding a single network by two or more generators, converters or transformers
  • H02J3/381—Dispersed generators
• • H—ELECTRICITY
  • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
  • H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
  • H02J3/00—Circuit arrangements for AC mains or AC distribution networks
  • H02J3/38—Arrangements for parallely feeding a single network by two or more generators, converters or transformers
  • H02J3/46—Controlling of the sharing of output between the generators, converters, or transformers
  • H02J3/48—Controlling the sharing of the in-phase component
• • H—ELECTRICITY
  • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
  • H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
  • H02J3/00—Circuit arrangements for AC mains or AC distribution networks
  • H02J3/38—Arrangements for parallely feeding a single network by two or more generators, converters or transformers
  • H02J3/46—Controlling of the sharing of output between the generators, converters, or transformers
  • H02J3/50—Controlling the sharing of the out-of-phase component
• • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
  • F05—INDEXING SCHEMES RELATING TO ENGINES OR PUMPS IN VARIOUS SUBCLASSES OF CLASSES F01-F04
  • F05B—INDEXING SCHEME RELATING TO WIND, SPRING, WEIGHT, INERTIA OR LIKE MOTORS, TO MACHINES OR ENGINES FOR LIQUIDS COVERED BY SUBCLASSES F03B, F03D AND F03G
  • F05B2260/00—Function
  • F05B2260/96—Preventing, counteracting or reducing vibration or noise
• • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
  • F05—INDEXING SCHEMES RELATING TO ENGINES OR PUMPS IN VARIOUS SUBCLASSES OF CLASSES F01-F04
  • F05B—INDEXING SCHEME RELATING TO WIND, SPRING, WEIGHT, INERTIA OR LIKE MOTORS, TO MACHINES OR ENGINES FOR LIQUIDS COVERED BY SUBCLASSES F03B, F03D AND F03G
  • F05B2270/00—Control
  • F05B2270/10—Purpose of the control system
  • F05B2270/103—Purpose of the control system to affect the output of the engine
  • F05B2270/1033—Power (if explicitly mentioned)
• • H—ELECTRICITY
  • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
  • H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
  • H02J2300/00—Systems for supplying or distributing electric power characterised by decentralized, dispersed, or local generation
  • H02J2300/20—The dispersed energy generation being of renewable origin
  • H02J2300/28—The renewable source being wind energy
• • 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
• • 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
  • Y02E10/76—Power conversion electric or electronic aspects

Definitions

• Wind turbine or wind farm consisting of a large number of wind turbines
• the present invention relates to a wind turbine or a wind farm consisting of a plurality of wind turbines.
• Wind energy plants or a wind farm consisting of these are regularly connected to a power grid, into which the generated electric current is fed or released.
• the peculiarity of the power feed in wind turbines is that due to the very fluctuating wind conditions, the power fed in also fluctuates accordingly.
• This is a big difference to energy producers such as nuclear power plants, hydropower plants, coal-fired or natural gas power plants, in which fluctuations may also be detectable over longer periods of time, but there are no power fluctuations for relatively short periods of time.
• nuclear power plants, hydropower plants, natural gas power plants, etc. are more likely to be used to provide the base load of a network, while wind turbines are only able to provide a basic electricity load in wind-resistant areas.
• the aim of the present invention is to avoid or at least reduce the aforementioned disadvantages.
• the invention provides that, regardless of the current wind supply and the active power to be made available by the wind power plant, a wind power plant or a wind farm consisting of a large number of wind energy plants always emits a constant apparent power into the network.
• the advantage of the invention lies in a stabilizing or supporting effect on the power supply network. Is z. B. due to low wind availability little active power ready, the quality of the network can be improved by providing reactive power. This in turn results in reduced voltage fluctuations, which incidentally can lead to the fact that the discharge of electrical energy into the network has to be reduced when the voltage in the network reaches an upper limit value.
• the respective reactive power component can be set so that it is capacitance or inductive. If sufficient active power is available, it is transferred to the grid and supports the grid when the power requirement changes. The remaining reactive power component can in turn be delivered in a known manner as inductive or capacitive reactive power.
• the flexible setting of the power gradient (dP / dt) enables adaptation to the network's ability to withstand rapid changes in performance. Even in the grid with dominant wind energy, the described apparent power management can already be taken into account in the planning phase, particularly when grid reinforcement measures are required, in order to bring about cost-reducing effects.
• Fig. 1 is a reactive power / active power time diagram of a control system of a wind turbine according to the invention
• FIG. 2 representation of a block circuit of a control device
• FIG. 1 shows a reactive power / active power time diagram of a control system according to a wind power plant according to the invention.
• P means the active power
• Q the reactive power.
• ⁇ As can be seen from the diagram, the values for the active power as well as for the reactive power are reciprocally related to each other, ie the reactive power drops as the active power increases and vice versa.
• the control and regulating device of the wind energy installation initially has a rectifier (16) in which the AC voltage generated in the generator of the wind energy installation is rectified (DC voltage intermediate circuit).
• a frequency converter connected to the rectifier converts the DC voltage, which is initially the same in the intermediate circuit, into an AC voltage, which is fed into the network as a three-phase AC voltage via lines L1, L2 and L3.
• the frequency converter 18 is controlled with the aid of the microcomputer 20, which is part of the entire control device.
• the microprocessor is coupled to the frequency converter 18.
• the reactive power at a given apparent power is calculated according to the formula
• the active power generated by the wind turbine can of course also be reduced in a targeted manner (e.g. by pitching the rotor blades) in order to feed in a higher (capacitive or inductive) reactive power component can.
• a higher reactive power component can be used in order to feed in a higher (capacitive or inductive) reactive power component.
• the primary aim is not to keep the voltage constant, but to influence the mains voltage in the sense of the network operator.
• the voltage level in the network can be raised to a desired value.
• these effects are a. also depends on the topology of the network. If there is a high reactive power requirement in the vicinity of the wind power plant, this reactive power does not then have to be transported over long distances with corresponding losses through the network, but can be provided relatively close to the consumer by the wind power plant.

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)
• Supply And Distribution Of Alternating Current (AREA)
• Control Of Eletrric Generators (AREA)
• Wind Motors (AREA)
• Buildings Adapted To Withstand Abnormal External Influences (AREA)
• Cultivation Of Plants (AREA)
• Control Of Electrical Variables (AREA)

Priority Applications (16)

Applications Claiming Priority (2)

Publications (1)

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ID=7664954

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Cited By (2)

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Citations (6)

Family Cites Families (16)

• 2000
  • 2000-11-28 DE DE10059018A patent/DE10059018C2/de not_active Expired - Fee Related
• 2001
  • 2001-11-15 WO PCT/EP2001/013203 patent/WO2002044560A1/de not_active Ceased
  • 2001-11-15 DE DE50103154T patent/DE50103154D1/de not_active Expired - Lifetime
  • 2001-11-15 AU AU1910302A patent/AU1910302A/xx active Pending
  • 2001-11-15 DK DK01998736T patent/DK1337754T3/da active
  • 2001-11-15 NZ NZ526077A patent/NZ526077A/en not_active IP Right Cessation
  • 2001-11-15 KR KR10-2003-7007053A patent/KR100514495B1/ko not_active Expired - Fee Related
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  • 2001-11-15 CN CNB018196608A patent/CN100398812C/zh not_active Expired - Fee Related
  • 2001-11-15 JP JP2002546075A patent/JP2004523025A/ja active Pending
  • 2001-11-15 PT PT01998736T patent/PT1337754E/pt unknown
  • 2001-11-15 AT AT01998736T patent/ATE272792T1/de active
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  • 2001-11-15 MX MXPA03004686A patent/MXPA03004686A/es active IP Right Grant
• 2003
  • 2003-05-27 MA MA27180A patent/MA25859A1/fr unknown
  • 2003-05-27 NO NO20032385A patent/NO331038B1/no not_active IP Right Cessation
  • 2003-05-28 ZA ZA2003/04126A patent/ZA200304126B/en unknown
• 2006
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