WO2011104285A1 - Procédé permettant de compenser les variations de la puissance active de sortie ainsi que système convertisseur correspondant et éolienne - Google Patents

Procédé permettant de compenser les variations de la puissance active de sortie ainsi que système convertisseur correspondant et éolienne Download PDF

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Publication number
WO2011104285A1
WO2011104285A1 PCT/EP2011/052700 EP2011052700W WO2011104285A1 WO 2011104285 A1 WO2011104285 A1 WO 2011104285A1 EP 2011052700 W EP2011052700 W EP 2011052700W WO 2011104285 A1 WO2011104285 A1 WO 2011104285A1
Authority
WO
WIPO (PCT)
Prior art keywords
intermediate circuit
energy storage
converter
network
circuit voltage
Prior art date
Application number
PCT/EP2011/052700
Other languages
German (de)
English (en)
Inventor
Andreas Buecker
Original Assignee
Kenersys 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 Kenersys Gmbh filed Critical Kenersys Gmbh
Publication of WO2011104285A1 publication Critical patent/WO2011104285A1/fr

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Classifications

    • 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

Definitions

  • the invention relates to a method for compensating for fluctuations in the active power output of a working as a generator electric machine to a power supply network by means of an electrical energy storage system with rechargeable energy storage, wherein an inverter system is electrically interposed between the electrical machine and the network, the network side inverter and a DC intermediate circuit having at least one device for influencing the intermediate circuit voltage.
  • the invention further relates to an inverter system for electrically coupling an electric machine which can be operated as a generator to a power supply network, wherein the converter system has a network-side converter and a DC intermediate circuit with at least one device for influencing the intermediate circuit voltage, and finally a wind energy system with an inverter system and a generator electric machine.
  • Wind turbines generally have electrical machines designed as synchronous or asynchronous machines, the power of which is fed in at variable speeds.
  • a long-used type of wind turbine is a type of wind turbine with a separately excited synchronous machine and a a 1 s "full converter” trained Converter system.
  • For the electric machine out is - instead of a self-commutated frequency converter, as usual in double-fed asynchronous machines - alternatively a diode rectifier with boost converter used.
  • wind turbines with permanent-magnet synchronous machine and full converter are also in use.
  • the high efficiency of the synchronous machine due to its windingless rotor is the distinguishing feature.
  • the wind energy plant generates its energy as a function of the wind speed by means of the electric machine.
  • the active power fed by the wind energy plant into an energy network of the energy supply network is subject to the fluctuations of the wind speed and can only be predicted and guaranteed to a limited extent. Therefore, power plants must be integrated into the network, which run in stand-by mode in order to be able to ensure an always demand-oriented energy supply in the short term.
  • the object of the invention is to provide a method, an inverter system and a wind turbine for compensating for variations in the active power output of an electrical machine to a power supply network by means of an electrical energy storage system, which are simple and inexpensive to implement.
  • the energy storage system is coupled to the intermediate circuit voltage potentials of the DC intermediate circuit and that charging and discharging of the energy storage by controlling and / or regulating the DC link voltage by means of the network-side converter (mains side converter) and the Device for influencing the DC link voltage takes place.
  • the network-side converter mains side converter
  • the Device for influencing the DC link voltage takes place.
  • a corresponding control / regulating device is preferably provided for controlling and / or regulating the intermediate circuit voltage by means of the device for influencing the intermediate circuit voltage.
  • the device for influencing the DC link voltage on a brake chopper and / or a step-up converter.
  • control and / or regulation takes place as a function of a dependent of the rotational speed and / or the torque and / or the power output of the electrical machine size. These quantities describe the actual state of the electrical machine.
  • control and / or regulation takes place as a function of a variable which depends on the frequency and / or on the voltage of the network. These quantities describe the actual state of the network.
  • control and / or regulation takes place as a function of a difference between the frequency and a nominal frequency and / or as a function of a difference between the voltage and the nominal voltage of the energy supplier.
  • the energy stores are discharged at a value of the intermediate circuit voltage below a voltage threshold and are charged at a value of the intermediate circuit voltage above this voltage threshold.
  • the converter system according to the invention has an energy storage system with rechargeable energy stores, wherein the energy storage system is electrically coupled to the intermediate circuit voltage potentials of the DC intermediate circuit.
  • the inverter system is an inverter system suitable for a wind turbine.
  • the components of the device for influencing the intermediate circuit voltage are those components which are also used in known wind power plants, in particular power electronics components.
  • the charging and discharging of the energy storage takes place via a control and / or regulation of the level of the intermediate circuit voltage by means of the network-side converter (in short: network-side converter) and the device for influencing the intermediate circuit voltage. If the intermediate circuit voltage is greater than the voltage of the electrical energy storage system, the energy storage devices are charged, if the voltage is lower than the voltage of the electrical energy storage system, the energy storage devices are discharged.
  • the network-side converter in short: network-side converter
  • the energy storage system is electrically coupled to the intermediate circuit voltage potentials via diodes (coupling diodes).
  • the diodes form a reverse polarity protection.
  • the device for influencing the intermediate circuit voltage has a brake chopper and / or a step-up converter.
  • the energy storage system is a battery system with rechargeable batteries (rechargeable batteries).
  • the converter system - viewed from the intermediate circuit in addition to the network-side converter also has a machine-side inverter.
  • the machine-side converter is a rectifier
  • the network-side converter is an inverter.
  • Each of the converters can be configured as a passive or active converter.
  • a designed as a passive inverter inverter is in particular realized with diodes
  • an inverter designed as an active converter is in particular realized with bipolar transistors with insulated gate electrode (English: insulated gate bipolar transistors IGBTs).
  • the converter system has at least one line filter.
  • the line filter is preferably electrically connected to the network-side converter.
  • in the network direction to the network-side converter connects to a (three-phase) transformer, which is electrically interposed between the network-side inverter and the network.
  • the wind turbine according to the invention has the aforementioned converter system and an electric machine which can be operated as a generator.
  • the electric machine is designed as a synchronous machine (synchronous generator) or as an asynchronous machine (asynchronous generator).
  • the energy storage system is in particular a battery system with parallel and / or series-connected rechargeable batteries. Appropriately, that will Energy storage system installed in the vicinity of the wind turbine, in particular in a maximum of the magnitude of the extent of the wind turbine area of the wind turbine.
  • the wind turbine has a tower, in and / or at the base of the tower, the energy storage system is arranged. Due to the high weight of the energy storage system results in a low center of gravity.
  • Fig. 1 shows an arrangement of a generator and an inverter system of a wind turbine
  • FIG. 2 shows a diagram in which the intermediate circuit voltage is plotted against the charging or discharging current.
  • the multi-phase electric machine 10 is designed, for example, as a synchronous generator, but could also be designed as an asynchronous generator.
  • the number of phases can be three or six, for example.
  • the electrical machine 10 is electrically connected via three lines 14, 16, 18 to a machine-side converter 20 of the converter system 12.
  • the lines 14, 16, 18 via transistors 22 in particular bipolar transistors with insulated gate - Engl: insulated-gate bipolar transistors IGBTs
  • the machine-side converter 20 is designed as an active rectifier 30.
  • the intermediate circuit 24 also has two devices for influencing the intermediate circuit voltage 36, 38 in a current path 34 connecting the two potential carriers 26, 28.
  • the one of the devices 36 comprises a brake chopper 40, which in a potential carrier 26, 28 also electrically connecting further current path 42 has a resistor (braking resistor) 44 and a switching transistor 46 which are arranged in series.
  • the other of the devices 38 has a step-up converter 48, which has an inductive element 50 in the potential carrier 26 with the higher potential and a further switching transistor 52 in a the two potential carriers 26, 28 also connecting other current path 54.
  • the converter system 12 has a network-side converter 64 designed as an inverter 62.
  • the potential carriers 26, 28 are connected to the three lines 56, 58, 60 via transistors 66 (in particular IGBTs).
  • the network-side converter 64 is thus designed as an active inverter 62.
  • the converter system 12 furthermore has an energy storage system 68 configured as a battery system, whose poles 70, 72 are electrically coupled via respective diodes 74, 76 to the potential carriers 26, 28 with the intermediate circuit voltage potentials U +, U-.
  • the energy storage system 68 has in particular a plurality of energy stores 78, 80, which are connected in series and / or in parallel.
  • the energy storage 78, 80 are in a designed as a battery system electrical energy storage system 68 rechargeable batteries (or accumulators) or battery cells.
  • the charging and discharging of the rechargeable energy stores 78, 80 takes place via a control and / or regulation of the level of the intermediate circuit voltage by means of the at least one device for influencing the intermediate circuit voltage 36, 38 and a control / regulating device (not shown) for control and / or regulation the intermediate circuit voltage by means of the device for influencing the intermediate circuit voltage 36, 38 and the network-side inverter 64th
  • the energy stores 78, 80 are charged, if the voltage is lower than the voltage of the electrical energy storage system 68, the energy stores 78, 80 are discharged , Via the network-side inverter 64, the energy is released into the network.
  • the voltage must not be too large, so as not to destroy the barrier layer formed as IGBT's transistors 22, 66 and the other components used 44, 46, 50, 52.
  • FIG. 2 shows a corresponding graph in which the intermediate circuit voltage is plotted against the charging or discharging current.
  • a voltage threshold Vs which separates the charging area from the discharge area is, for example, 1000 V.
  • the energy stores 78, 80 are thus discharged at a value of the intermediate circuit voltage below this voltage threshold Vs (area I) and at a value of the intermediate circuit voltage above the first voltage threshold Vsl loaded (area II).
  • Typical values of the intermediate circuit voltage are 950 V DC for discharging and 1050 V DC for charging.
  • the DC link voltage is - raised by the boost converter 48
  • control and / or regulation takes place as a function of a variable which depends on the rotational speed and / or the torque and / or the power output of the electric machine 10 and / or in dependence on a variable which depends on the frequency and / or voltage of the network.
  • the battery system is expediently installed near the wind turbine, for example in the tower base of the turbine.

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  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Control Of Eletrric Generators (AREA)

Abstract

L'invention concerne un procédé permettant de compenser les variations de la puissance active de sortie d'une machine électrique (10) fonctionnant comme une génératrice sur un réseau d'alimentation en énergie au moyen d'un système accumulateur d'énergie électrique (68) comportant des accumulateurs d'énergie (78, 80) rechargeables. Un système convertisseur (12) est connecté électriquement entre la machine électrique (10) et le réseau, et le système convertisseur (12) présente un convertisseur côté réseau (64) et un circuit intermédiaire à tension continue (24) comportant au moins un dispositif destiné à agir sur la tension de circuit intermédiaire (36, 38). Selon l'invention, le système accumulateur d'énergie (68) est couplé aux potentiels de tension de circuit intermédiaire (U+, U-) du circuit intermédiaire à tension continue (24) et une charge et une décharge des accumulateurs d'énergie (78, 80) sont effectuées par commande et/ou régulation de la tension de circuit intermédiaire au moyen du convertisseur côté réseau (64) et du dispositif destiné à agir sur la tension de circuit intermédiaire (36, 38). L'invention concerne en outre un système convertisseur (12) correspondant et une éolienne équipée dudit système convertisseur.
PCT/EP2011/052700 2010-02-23 2011-02-23 Procédé permettant de compenser les variations de la puissance active de sortie ainsi que système convertisseur correspondant et éolienne WO2011104285A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE201010009056 DE102010009056A1 (de) 2010-02-23 2010-02-23 Verfahren zum Ausgleichen von Schwankungen der Wirkleistungsabgabe sowie entsprechendes Umrichtersystem und Windenergieanlage
DE102010009056.5 2010-02-23

Publications (1)

Publication Number Publication Date
WO2011104285A1 true WO2011104285A1 (fr) 2011-09-01

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DE (1) DE102010009056A1 (fr)
WO (1) WO2011104285A1 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2017194196A1 (fr) * 2016-05-13 2017-11-16 Sew-Eurodrive Gmbh & Co. Kg Système de convertisseurs comportant un convertisseur alternatif/continu et procédé de fonctionnement d'un système de convertisseurs

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102015205691A1 (de) 2015-03-30 2016-10-06 Siemens Aktiengesellschaft Verfahren zur Geräuschreduzierung eines elektrischen Motors
CN118472978B (zh) * 2024-07-10 2024-09-27 深圳市健网科技有限公司 一种分布式储能系统的补充性规划方法及系统

Citations (3)

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Publication number Priority date Publication date Assignee Title
US6005362A (en) * 1998-02-13 1999-12-21 The Texas A&M University Systems Method and system for ride-through of an adjustable speed drive for voltage sags and short-term power interruption
WO2003023933A1 (fr) * 2001-09-13 2003-03-20 Made Tecnologías Renovables, S.A. Systeme d'amenagement, de generation/stockage, de puissance en reseaux de distribution electrique, ameliorant sa stabilite dynamique et regulation de frequence
WO2008104017A1 (fr) * 2007-02-26 2008-09-04 Newcastle Innovation Limited Contrôleur et onduleur d'éolienne intégrés

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Publication number Priority date Publication date Assignee Title
US7391126B2 (en) * 2006-06-30 2008-06-24 General Electric Company Systems and methods for an integrated electrical sub-system powered by wind energy

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6005362A (en) * 1998-02-13 1999-12-21 The Texas A&M University Systems Method and system for ride-through of an adjustable speed drive for voltage sags and short-term power interruption
WO2003023933A1 (fr) * 2001-09-13 2003-03-20 Made Tecnologías Renovables, S.A. Systeme d'amenagement, de generation/stockage, de puissance en reseaux de distribution electrique, ameliorant sa stabilite dynamique et regulation de frequence
WO2008104017A1 (fr) * 2007-02-26 2008-09-04 Newcastle Innovation Limited Contrôleur et onduleur d'éolienne intégrés

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2017194196A1 (fr) * 2016-05-13 2017-11-16 Sew-Eurodrive Gmbh & Co. Kg Système de convertisseurs comportant un convertisseur alternatif/continu et procédé de fonctionnement d'un système de convertisseurs
CN109155582A (zh) * 2016-05-13 2019-01-04 索尤若驱动有限及两合公司 具有ac/dc-变流器的换流器系统和用于运行换流器系统的方法
CN109155582B (zh) * 2016-05-13 2020-11-10 索尤若驱动有限及两合公司 具有ac/dc-变流器的换流器系统和用于运行换流器系统的方法
US10873266B2 (en) 2016-05-13 2020-12-22 Sew-Eurodrive Gmbh & Co., Kg Converter system having an AC/DC converter, and method for operating a converter system
US11437920B2 (en) 2016-05-13 2022-09-06 Sew-Eurodrive Gmbh & Co. Kg Converter system having an AC/DC converter, and method for operating a converter system

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Publication number Publication date
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