EP3821527A1 - Procédé de commande d'un ensemble d'injection - Google Patents

Procédé de commande d'un ensemble d'injection

Info

Publication number
EP3821527A1
EP3821527A1 EP19737086.9A EP19737086A EP3821527A1 EP 3821527 A1 EP3821527 A1 EP 3821527A1 EP 19737086 A EP19737086 A EP 19737086A EP 3821527 A1 EP3821527 A1 EP 3821527A1
Authority
EP
European Patent Office
Prior art keywords
voltage
intermediate circuit
electrical
inverter
voltage level
Prior art date
Legal status (The legal status 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 status listed.)
Pending
Application number
EP19737086.9A
Other languages
German (de)
English (en)
Inventor
Alfred Beekmann
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Wobben Properties GmbH
Original Assignee
Wobben Properties GmbH
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 Wobben Properties GmbH filed Critical Wobben Properties GmbH
Publication of EP3821527A1 publication Critical patent/EP3821527A1/fr
Pending legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
    • H02M7/00—Conversion of ac power input into dc power output; Conversion of dc power input into ac power output
    • H02M7/42—Conversion of dc power input into ac power output without possibility of reversal
    • H02M7/44—Conversion of dc power input into ac power output without possibility of reversal by static converters
    • H02M7/48—Conversion of dc power input into ac power output without possibility of reversal by static converters using discharge tubes with control electrode or semiconductor devices with control electrode
    • H02M7/53—Conversion of dc power input into ac power output without possibility of reversal by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal
    • H02M7/537—Conversion of dc power input into ac power output without possibility of reversal by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal using semiconductor devices only, e.g. single switched pulse inverters
    • H02M7/539—Conversion of dc power input into ac power output without possibility of reversal by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal using semiconductor devices only, e.g. single switched pulse inverters with automatic control of output wave form or frequency
    • H02M7/5395—Conversion of dc power input into ac power output without possibility of reversal by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal using semiconductor devices only, e.g. single switched pulse inverters with automatic control of output wave form or frequency by pulse-width modulation
    • 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
    • H02J3/24—Arrangements for preventing or reducing oscillations of power in networks
    • 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
    • H02J3/28—Arrangements for balancing of the load in a network by storage of energy
    • H02J3/32—Arrangements for balancing of the load in a network by storage of energy using batteries with converting means
    • 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
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
    • H02M5/00—Conversion of ac power input into ac power output, e.g. for change of voltage, for change of frequency, for change of number of phases
    • H02M5/40—Conversion of ac power input into ac power output, e.g. for change of voltage, for change of frequency, for change of number of phases with intermediate conversion into dc
    • H02M5/42—Conversion of ac power input into ac power output, e.g. for change of voltage, for change of frequency, for change of number of phases with intermediate conversion into dc by static converters
    • H02M5/44—Conversion of ac power input into ac power output, e.g. for change of voltage, for change of frequency, for change of number of phases with intermediate conversion into dc by static converters using discharge tubes or semiconductor devices to convert the intermediate dc into ac
    • H02M5/453—Conversion of ac power input into ac power output, e.g. for change of voltage, for change of frequency, for change of number of phases with intermediate conversion into dc by static converters using discharge tubes or semiconductor devices to convert the intermediate dc into ac using devices of a triode or transistor type requiring continuous application of a control signal
    • H02M5/458—Conversion of ac power input into ac power output, e.g. for change of voltage, for change of frequency, for change of number of phases with intermediate conversion into dc by static converters using discharge tubes or semiconductor devices to convert the intermediate dc into ac using devices of a triode or transistor type requiring continuous application of a control signal using semiconductor devices only
    • H02M5/4585—Conversion of ac power input into ac power output, e.g. for change of voltage, for change of frequency, for change of number of phases with intermediate conversion into dc by static converters using discharge tubes or semiconductor devices to convert the intermediate dc into ac using devices of a triode or transistor type requiring continuous application of a control signal using semiconductor devices only having a rectifier with controlled elements
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02P—CONTROL OR REGULATION OF ELECTRIC MOTORS, ELECTRIC GENERATORS OR DYNAMO-ELECTRIC CONVERTERS; CONTROLLING TRANSFORMERS, REACTORS OR CHOKE COILS
    • H02P9/00—Arrangements for controlling electric generators for the purpose of obtaining a desired output
    • H02P9/10—Control effected upon generator excitation circuit to reduce harmful effects of overloads or transients, e.g. sudden application of load, sudden removal of load, sudden change of load
    • H02P9/102—Control effected upon generator excitation circuit to reduce harmful effects of overloads or transients, e.g. sudden application of load, sudden removal of load, sudden change of load for limiting effects of transients
    • 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
    • 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
    • Y02E10/76—Power conversion electric or electronic aspects

Definitions

  • the present invention relates to a method for controlling a feed arrangement.
  • the present invention also relates to a method for controlling a wind turbine having an infeed arrangement.
  • the invention also relates to a corresponding feed arrangement and it also relates to a corresponding wind energy installation, which namely has a feed arrangement.
  • the invention also relates to a wind farm with a plurality of wind energy plants.
  • Such an infeed arrangement generally has an inverter which generates an alternating current from a direct current or a direct voltage, which is particularly adapted to the frequency and phase of the electrical supply network, in order to thus feed it into the electrical supply network.
  • Such an inverter is regularly supplied from a DC voltage intermediate circuit which provides the DC voltage or the DC current.
  • reference is generally made to a DC voltage in connection with a DC voltage intermediate circuit, but this also analogously includes designs with a corresponding DC current.
  • Such a direct voltage intermediate circuit receives its energy from a corresponding generator, namely in the case of a wind energy installation from the generator of the wind energy installation.
  • an alternating current is generated by the generator, which is rectified by means of a rectifier and fed to the DC voltage intermediate circuit.
  • a step-up converter is also used.
  • the inverter can therefore always feed as much power into the electrical supply network as is input into the DC voltage intermediate circuit by such a generator, in particular a generator. If, for example, the wind speed fluctuates in the case of a wind energy installation, the power generated by the generator also fluctuates and thus the power provided in the DC voltage intermediate circuit. Finally, the power fed into the electrical supply network also fluctuates.
  • the present invention is therefore based on the object of addressing at least one of the problems mentioned above.
  • a solution is to be proposed that enables the feed to be stabilized with as little effort as possible for the feed arrangement mentioned.
  • At least an alternative solution to previously known solutions is to be proposed.
  • a method according to claim 1 is proposed. This method thus controls a feed arrangement for feeding electrical power into an electrical supply network.
  • a rectifier is used to rectify a first AC voltage into a DC voltage and to provide it at a DC link. With a coupled to the DC link Inverters, the DC voltage is alternated into a second AC voltage.
  • a voltage level of the DC voltage of the DC voltage intermediate circuit be varied via a control of the rectifying device in order to control charging or discharging of an electrical store coupled to the DC voltage intermediate circuit.
  • a generator of a wind power plant can provide an AC voltage that forms a first AC voltage and that is rectified by the rectification device into the DC voltage.
  • the inverter ensures that the resulting DC voltage is alternated into a second AC voltage, namely for feeding into the electrical supply network.
  • the second AC voltage is therefore adapted to an AC voltage in the electrical supply network, particularly in terms of amount, frequency and phase.
  • the amount, ie the amplitude of the AC voltage can differ from the amplitude of the mains voltage if, for example, a transformer is arranged between the feed arrangement and the electrical supply network.
  • an electrical memory is coupled to the DC link.
  • electrical power flows from the DC voltage intermediate circuit into the electrical memory or from the electrical memory into the DC voltage intermediate circuit. In the fully balanced case, no power flows.
  • the voltage level of the DC voltage of the DC voltage intermediate circuit be varied by controlling the rectification device. If the DC voltage of the DC voltage intermediate circuit is controlled to a high voltage level, power will flow to the electrical storage device accordingly and the electrical storage device is thereby charged. If the DC voltage of the DC voltage intermediate circuit is controlled to a low voltage level, the electrical memory delivers power to the DC voltage intermediate circuit. Then the supply of electrical power into the electrical supply network is additionally provided with this power delivered by the electrical storage. It was particularly recognized here that a step-up converter and / or step-down converter or current controller as a control unit between the DC voltage intermediate circuit and the electrical store can be saved.
  • the electrical memory be coupled to the DC voltage intermediate circuit without the interposition of a control unit.
  • the rectification device and / or the inverter had to be controlled anyway and that charging or discharging of the electrical storage device can now only be controlled by means of a variation of the control, without additional hardware having to be used.
  • a switch can be provided between the electrical store and the DC voltage intermediate circuit, particularly for safety reasons.
  • This control of the voltage level of the DC voltage of the DC voltage intermediate circuit can be carried out via the rectification device, which can also include a step-up converter or can be designed as an active rectifier. In principle, however, it is also possible to control this voltage level via the inverter, because this also influences this voltage level depending on how much power it feeds into the electrical supply network. In particular, the interaction between the inverter and the rectifying device can control this voltage level.
  • a variant of the control of this voltage level can consist in that the inverter receives a fixed power value, namely in particular a fixed active power value, which specifies a setpoint value of the power, accordingly the inverter feeds power into the electrical supply network.
  • the rectifying device can then control the voltage level accordingly, whether it inputs more or less power into the DC voltage intermediate circuit.
  • the rectification device, the DC voltage intermediate circuit and the inverter form a feed part arrangement and the feed part arrangement is designed as a bidirectional converter, and / or the inverter is designed as a bidirectional inverter.
  • the electrical memory coupled to the direct voltage intermediate circuit can also be charged from the electrical supply network without additional equipment. This also makes it possible to support the network in this way, in which power is drawn from the electrical supply network, in order to react particularly to an oversupply of power in the electrical supply network.
  • the inverter regardless of the variation in the voltage level of the DC voltage of the DC voltage intermediate circuit, alternates a predetermined electrical power and makes it available for feeding into the electrical supply network.
  • the DC voltage of the DC voltage intermediate circuit forms the input variable for the inverter and it is proposed here that the The inverter thus adapts to the varying input voltage, i.e. to the variation in the voltage level of the input voltage, to the extent that the specified electrical power to be fed in is generated and fed in with the same possible value, whether the voltage level of the DC voltage in the DC voltage intermediate circuit is high or is low.
  • the voltage level of the DC voltage of the DC voltage intermediate circuit is preferably varied between an upper voltage level and a lower voltage level. This allows limit values to be set. This can ensure that the voltage level of the DC voltage, which thus forms the input of the inverter, is in any case kept in a range in which the inverter can operate.
  • the upper voltage level is preferably selected to a value of 1000 V, to a value of 1200 V, or to a value in a range from 1000 V to 1200 V.
  • a value of approximately 600 V is preferably selected for the lower voltage level.
  • This range specifies a range that can be used by the inverter and, at the same time, enables a sufficient variation in the voltage level so that the electrical store can also be charged and discharged accordingly. It should be noted that, especially when using a battery storage as the electrical storage, there are no very large voltage differences between the charged and discharged state.
  • the electrical memory coupled to the DC voltage intermediate circuit has a memory connection via which it is coupled to the DC voltage intermediate circuit.
  • the electrical storage device be characterized by an electrical charging potential, which causes the electrical storage device to be charged when this charging potential is present at the storage connection.
  • the electrical store is characterized by an electrical discharge potential which causes the electrical store to be discharged when a voltage at this discharge potential is applied to the storage connection. lies.
  • the charging potential is less than a maximum voltage level of the DC voltage to which the inverter is designed. It is proposed for the discharge potential that this is greater than a minimum voltage level of the direct voltage that the inverter requires for the inverter.
  • the charging potential is less than the upper voltage level and that the discharge potential is greater than the lower voltage level.
  • the maximum voltage level can thus correspond to the upper voltage level and the minimum voltage level to the lower voltage level.
  • the maximum voltage level or the upper voltage level and the minimum voltage level or the lower voltage level can thus form a voltage band in which the DC voltage is maintained.
  • the electrical storage device is designed such that it can be operated well in this area, in particular in this voltage band. The same applies to the inverter.
  • the electrical storage device is preferably electrically coupled directly to the DC voltage intermediate circuit in such a way that the electrical storage device is charged and / or discharged by adjusting the voltage level of the DC voltage of the DC voltage intermediate circuit. It is therefore proposed that the voltage level alone controls the charging and discharging and that no control unit is provided between the electrical store and the DC voltage intermediate circuit.
  • no so-called DC / DC actuator which can also be referred to synonymously as a current regulator, is provided between the electrical store and the DC voltage intermediate circuit.
  • Such a DC / DC actuator can thus be saved by controlling the rectification device in particular in order to control charging and discharging via the voltage level of the DC link.
  • the rectification device is advantageously actively controlled so that the voltage level of the DC voltage of the DC voltage intermediate circuit is varied for charging and / or discharging the electrical storage device.
  • An active rectifier is therefore particularly suggested here.
  • the voltage level of its output and thus the voltage level of the DC voltage intermediate circuit can be controlled during rectification, particularly of a stator current emitted by a generator.
  • the power fed into the DC voltage intermediate circuit can be controlled by such an active rectifier in order to thereby control the voltage level of the DC voltage intermediate circuit.
  • the rectification device perform the rectification by an actively controlled rectifier without using a step-up converter.
  • a step-up converter is also proposed.
  • the first alternating voltage is preferably provided by a generator of a wind energy plant.
  • this method can be used particularly well for feeding in electrical power from a wind energy installation.
  • Such an infeed arrangement can also be referred to as STATCOM and it is therefore preferably proposed that the infeed arrangement be designed as STATCOM.
  • the electrical memory creates the possibility of absorbing and releasing active power in order to react to corresponding power fluctuations in the electrical supply network.
  • the feed arrangement can be designed as a wind energy installation and comprise a synchronous generator and a full converter, or such a feed arrangement can be part of a wind energy installation that has a synchronous generator and a full converter, wherein the full converter can be viewed as a feed arrangement or as part of the feed arrangement.
  • a feed arrangement is also proposed. This is intended for feeding electrical power into the electrical supply network. It comprises a rectification device for rectifying a first AC voltage into a DC voltage. In addition, it comprises a DC voltage intermediate circuit coupled to the rectification device for providing the DC voltage. Furthermore, it comprises an inverter coupled to the DC voltage intermediate circuit for converting the DC voltage into a second AC voltage.
  • the rectification device with the inverter and the DC voltage intermediate circuit can be referred to as a full converter. Such a full converter would then be supplemented with an electrical memory.
  • the rectification device comprises a rectification control and is directed to vary a voltage level of the DC voltage at the DC voltage intermediate circuit in such a way that the electrical store coupled to the DC voltage intermediate circuit is charged or discharged via the voltage level.
  • this feed arrangement is controlled according to at least one method according to an embodiment described above and that the feed arrangement is prepared accordingly for this or has the correspondingly explained components.
  • the inverter is preferably set up to convert a predetermined electrical output from the direct voltage intermediate circuit independently of the variation in the voltage level of the direct voltage of the direct voltage intermediate circuit and to make it available for feeding into the electrical supply network.
  • the inverter is set up to feed this power into the electrical supply network. This can also be done according to an embodiment of a method described above.
  • a feed arrangement is preferably characterized in that the rectification device is set up to vary the voltage level of the DC voltage of the DC voltage intermediate circuit between an upper voltage level, preferably approximately 1000 to 1200 V, and a lower voltage level, preferably approximately 600 V, or the voltage level the DC voltage in this area. This variation or control of the voltage level can ensure that the inverter receives a sufficient input voltage and, at the same time, charging or discharging of the electrical storage can be controlled without additional hardware, in any case without additional DC controller, as required or specified.
  • the electrical memory be coupled directly to the DC voltage intermediate circuit, without the interposition of a converter, step-down converter or step-up converter, wherein a converter can also be referred to as a current converter.
  • the rectification device is formed by an actively controlled rectifier or the rectification device is formed by a passive rectifier with a step-up converter. In both cases, the voltage level in the DC link can be controlled. It is proposed that the rectification device, the DC intermediate circuit and the inverter form a feed arrangement, the feed arrangement being designed as a bidirectional converter.
  • the inverter can thus inverts from the DC voltage intermediate circuit and feed into the electrical supply network. Alternatively, however, it can also rectify an alternating current or an alternating voltage and supply corresponding power to the direct voltage intermediate circuit. In the same way, the rectifier can also invert. This is particularly advantageous for STATCOM operations.
  • At least the inverter preferably works bidirectionally and can therefore draw power from the electrical supply network and feed it into the DC voltage intermediate circuit.
  • the bidirectional inverter can form the rectification device and the inverter at the same time, which makes sense in any case if there is no connection to a generator for the STATCOM case or is temporarily not used, i.e. if only reactive power is fed into the electrical supply network , By the proposed control of the voltage level of the DC link, this power can also be stored further in the electrical memory.
  • the feed arrangement is preferably set up to carry out a method according to one of the embodiments described above.
  • a wind power plant is also proposed and this has an aerodynamic rotor and a generator coupled to the aerodynamic rotor for generating electrical power from wind, and it has a feed arrangement for feeding electrical power into an electrical supply network.
  • the feed arrangement is designed according to an embodiment of a feed arrangement described above.
  • it is set up to carry out a method for controlling a feed arrangement in accordance with an embodiment described above for this purpose.
  • the wind power plant have a feed-in control which is set up to control one or the rectifying device and / or one or the inverter.
  • a wind power installation can be supplemented particularly advantageously by an electrical store, which can be controlled without essential additional hardware, in particular without additional current controllers. This can be particularly simple A way to equalize the power feed of a wind turbine.
  • a wind farm which has at least two wind turbines.
  • This wind farm also has at least one feed arrangement in accordance with at least one embodiment of a feed arrangement described above. It can be provided here that the feed arrangement is arranged at a central point in the park and receives alternating current or alternating voltage on the input side from a plurality of wind energy installations of the wind farm, in particular from all wind energy installations of the wind farm.
  • This AC voltage obtained from several wind energy plants would then correspond to a first AC voltage explained above.
  • This central or common feed arrangement can then work with this first AC voltage as described above in accordance with embodiments for the method for controlling a feed arrangement or embodiments of a feed arrangement.
  • the wind farm can also have one or, in particular, a plurality of wind energy installations according to an embodiment of a wind energy installation described above. In particular, all wind turbines of the wind farm are designed in accordance with an embodiment of a wind turbine described above.
  • the wind farm is set up to carry out a method according to an embodiment of a method for controlling a feed arrangement.
  • a wind farm can thus also be equipped in a simple manner with an additional electrical store, or with several such electrical stores, the control being carried out in a simple manner and thus in a simple manner, particularly with little hardware expenditure, a continuation of the wind power fed in by the wind farm can be achieved.
  • Figure 1 shows a wind turbine in a perspective view.
  • Figure 2 shows a wind farm in a schematic representation.
  • Figure 3 shows a feed arrangement in a schematic representation.
  • FIG. 4 shows a voltage diagram for explaining a voltage band.
  • FIG. 1 shows a wind energy installation 100 with a tower 102 and a nacelle 104.
  • a rotor 106 with three rotor blades 108 and a spinner 110 is arranged on the nacelle 104.
  • the rotor 106 is set into a rotary movement by the wind and thereby drives a generator in the nacelle 104.
  • FIG. 2 shows a wind farm 112 with three wind turbines 100 by way of example, which can be the same or different.
  • the three wind energy plants 100 are therefore representative of basically any number of wind energy plants of a wind farm 112.
  • the wind energy plants 100 provide their power, namely in particular the electricity generated, via an electrical parking network 114.
  • the currents or powers of the individual wind turbines 100 generated in each case are added up and a transformer 116 is usually provided, which transforms up the voltage in the park and then into the supply network 120 at the feed point 118, which is also generally referred to as PCC feed.
  • FIG. 2 is only a simplified illustration of a wind farm 112, which shows no control, for example, although of course there is a control.
  • FIG. 3 shows a feed arrangement 300.
  • the generator 302 generates a power and, in the embodiment shown, provides this as a three-phase stator current at a generator output 304.
  • the generator 302 thus generates an alternating current, which is three-phase here.
  • a six-phase arrangement is also possible, for example, in which the generator 302 generates and provides two three-phase stator currents. In principle, however, other generator types can also be considered.
  • the alternating current generated in this way by the generator 302 is rectified by the rectification device 306, which can also be referred to simply as a rectifier, and thus this rectification device 306 then feeds a DC voltage intermediate circuit 308.
  • This DC voltage intermediate circuit 308 then has a DC voltage UDC which is variable according to the invention.
  • This DC voltage UDC of the DC voltage intermediate circuit 308 is then passed to an inverter 310.
  • the inverter 310 then generates a three-phase AC voltage signal at its inverter output 312.
  • This AC voltage signal or a correspondingly generated AC current is fed into an electrical supply network 314.
  • further elements such as a transformer or circuit breaker, can be arranged between the inverter output 312 and the electrical supply network 314, which is not explained in detail here.
  • the rectification device 306 is designed as an active rectifier.
  • This active rectifier thus internally has a circuit arrangement, in particular two controlled semiconductor switches per phase, which selectively control each phase in such a way that the rectification process does not take place passively, but is carried out in order to thereby also set the voltage level of the DC voltage UDC in the DC voltage intermediate circuit 308.
  • a passive rectifier can also be used in combination with a downstream step-up converter.
  • the rectifier can be designed as a passive and inexpensive component and thus rectify a first DC voltage intermediate circuit.
  • the step-up converter can then set the required DC voltage from such a first DC voltage intermediate circuit on a second DC voltage intermediate circuit.
  • the DC link 308 shown would then correspond to the second DC link.
  • an electrical memory 316 is also connected to the DC voltage intermediate circuit.
  • This electrical storage 316 is illustrated here as an electrical battery and this electrical storage is preferably also designed as a battery or battery bank.
  • This electrical memory 316 can then be charged or discharged by appropriate selection or by correspondingly setting the voltage level of the DC voltage UDC, charging and discharging also including partial charging or partial discharging. This means that power can be saved or withdrawn. This can be controlled via the voltage level of the DC voltage UDC, which will be explained in connection with FIG. 4.
  • a bidirectional direct current controller 318 can be saved.
  • Such a DC chopper 318 is shown in FIG. 3 only for illustration and therefore only via a dashed lead is connected to the DC voltage intermediate circuit 308.
  • it is also connected in dashed lines to an electrical store 316 ′, which can correspond to the electrical store 316.
  • this arrangement does not need to be implemented using the DC regulator 318, which obviously means that the DC regulator 318 can be saved.
  • the diagram in FIG. 4 explains that the DC voltage UDC can vary in a voltage band between an upper voltage level 440 and a lower voltage level 442.
  • the values for the upper voltage level 440 and lower voltage level 442 are given here as examples with 800 and 600 V.
  • the upper voltage level 440 in particular can also be 1000 V or 1200 V, for example.
  • the upper voltage level 440 and the lower voltage level 442 thus span a voltage band 444 in which the voltage level of the DC voltage UDC should be.
  • the DC voltage UDC is now conducted in such a way that it is carried approximately in the upper region of the voltage band 444 when the electrical store 316 is to be charged.
  • an operating point C is shown at which the electrical storage 316 is charged according to FIG. 3.
  • a voltage level of the DC voltage UDC is selected in a lower region of the voltage band 444. This is exemplified by an operating point D, which causes the electrical storage 316 to be discharged.
  • the inverter 310 is particularly controlled so that it adjusts to the voltage level of the DC voltage UDC in the DC voltage intermediate circuit 308. For example, if the voltage level of the DC voltage UDC in the DC voltage intermediate circuit 308 is low in order to extract electrical power from the electrical memory 316, the inverter 310 can compensate for this in particular by means of corresponding switching concepts or pulse patterns or pulse widths. Possibly. It can be accepted that, for example, an output voltage at the inverter output 312 drops somewhat, but at the same time the inverter generates a higher current for feeding into the electrical supply network 314 by means of appropriate switching patterns or switch controls.
  • the voltage level of the DC voltage UDC of the DC voltage intermediate circuit can then be freely selected and then selected for charging or discharging the electrical store directly connected to the DC voltage intermediate circuit.
  • the voltage level of the DC voltage UDC is particularly preferably controlled by an active rectifier.
  • Such a technology is therefore preferably used particularly in a wind energy installation which has a rectifier and an inverter anyway.
  • This can now be supplemented in a simple manner by means of an electrical storage device, the circuitry complexity being able to be kept low by the fact that in particular a direct current controller for charging and discharging the electrical storage device can be dispensed with.
  • the power fed in can also be better equalized in a simple manner.
  • a central inverter and / or a central rectifier and correspondingly a central electrical store are provided in a wind farm.

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  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Charge And Discharge Circuits For Batteries Or The Like (AREA)
  • Control Of Eletrric Generators (AREA)

Abstract

L'invention concerne un procédé pour commander un ensemble d'injection (300) destiné à injecter une puissance électrique dans un réseau d'alimentation électrique. Une première tension alternative est redressée en une tension continue (UDC) au moyen d'un dispositif de redressement (306) et fournie à un circuit intermédiaire (308) de tension continue et la tension continue (UDC) est convertie en deuxième tension alternative au moyen d'un onduleur (310) couplé au circuit intermédiaire (308) de tension continue. Un niveau de tension de la tension continue (UDC) du circuit intermédiaire (308) de tension continue est modifié par l'intermédiaire d'une commande du dispositif de redressement (306) et/ou de l'onduleur (310), afin de commander une charge ou décharge d'un accumulateur électrique (316) couplé au circuit intermédiaire (308) de tension continue.
EP19737086.9A 2018-07-09 2019-07-05 Procédé de commande d'un ensemble d'injection Pending EP3821527A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102018116538.2A DE102018116538A1 (de) 2018-07-09 2018-07-09 Verfahren zum Steuern einer Einspeiseanordnung
PCT/EP2019/068132 WO2020011675A1 (fr) 2018-07-09 2019-07-05 Procédé de commande d'un ensemble d'injection

Publications (1)

Publication Number Publication Date
EP3821527A1 true EP3821527A1 (fr) 2021-05-19

Family

ID=67211731

Family Applications (1)

Application Number Title Priority Date Filing Date
EP19737086.9A Pending EP3821527A1 (fr) 2018-07-09 2019-07-05 Procédé de commande d'un ensemble d'injection

Country Status (3)

Country Link
EP (1) EP3821527A1 (fr)
DE (1) DE102018116538A1 (fr)
WO (1) WO2020011675A1 (fr)

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US7476987B2 (en) * 2006-04-25 2009-01-13 The University Of New Brunswick Stand-alone wind turbine system, apparatus, and method suitable for operating the same
DE102009050402A1 (de) * 2009-10-22 2011-05-05 Psw-Energiesysteme Gmbh Energieaufbereitungs und -Speichersystem für Windenergieanlagen und Kraft-Wärmekopplungsanlagen
EP2546969A1 (fr) * 2011-07-14 2013-01-16 Siemens Aktiengesellschaft Procédé de contrôle d'un convertisseur de fréquence et convertisseur de fréquence
DE102012209995A1 (de) * 2012-06-14 2013-12-19 Robert Bosch Gmbh Schaltvorrichtung für eine Batterie und entsprechendes Schaltverfahren
DE102012215978A1 (de) * 2012-09-10 2014-03-13 Robert Bosch Gmbh Verfahren zur Verlängerung der Lebensdauer des Wechselrichters einer elektrischen Anlage, elektrische Anlage und Steuer- und Regeleinheit für eine elektrische Anlage
JP5997302B2 (ja) * 2015-02-04 2016-09-28 ファナック株式会社 蓄電器を用いたモータ駆動装置

Also Published As

Publication number Publication date
WO2020011675A1 (fr) 2020-01-16
DE102018116538A1 (de) 2020-01-09

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