WO2010018424A1 - Schéma de régulation de puissance d'un convertisseur alimentant un réseau asymétrique - Google Patents

Schéma de régulation de puissance d'un convertisseur alimentant un réseau asymétrique Download PDF

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Publication number
WO2010018424A1
WO2010018424A1 PCT/IB2008/053220 IB2008053220W WO2010018424A1 WO 2010018424 A1 WO2010018424 A1 WO 2010018424A1 IB 2008053220 W IB2008053220 W IB 2008053220W WO 2010018424 A1 WO2010018424 A1 WO 2010018424A1
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Prior art keywords
current
converter
power
grid
value
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PCT/IB2008/053220
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English (en)
Inventor
Kim Bo Larsen
Yin BO
Heng DENG
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Vestas Wind Systems A/S
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Priority to PCT/IB2008/053220 priority Critical patent/WO2010018424A1/fr
Publication of WO2010018424A1 publication Critical patent/WO2010018424A1/fr

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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
    • 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
    • H02M5/443—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 thyratron or thyristor type requiring extinguishing means
    • H02M5/45—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 thyratron or thyristor type requiring extinguishing means using semiconductor devices only
    • H02M5/4505—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 thyratron or thyristor type requiring extinguishing means using semiconductor devices only having a rectifier with controlled elements
    • 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
    • H02M1/00—Details of apparatus for conversion
    • H02M1/08—Circuits specially adapted for the generation of control voltages for semiconductor devices incorporated in static converters
    • H02M1/084—Circuits specially adapted for the generation of control voltages for semiconductor devices incorporated in static converters using a control circuit common to several phases of a multi-phase system
    • H02M1/0845—Circuits specially adapted for the generation of control voltages for semiconductor devices incorporated in static converters using a control circuit common to several phases of a multi-phase system digitally controlled (or with digital control)
    • 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
    • H02M5/443—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 thyratron or thyristor type requiring extinguishing means
    • H02M5/45—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 thyratron or thyristor type requiring extinguishing means using semiconductor devices only
    • H02M5/452—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 thyratron or thyristor type requiring extinguishing means using semiconductor devices only with automatic control of output waveform
    • 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

  • Wind turbines are used to convert wind energy to electrical energy in a clean and efficient way.
  • the electrical energy is typically supplied to an electric power transmission grid.
  • wind turbines Unlike “classical" power generation systems such as hydro electric systems, wind turbines typically operate with generators which are not able to support the grid in case of asymmetric grid voltages..
  • the worldwide penetration, i.e. installed capacity, of wind turbines for power generation has increased remarkably.
  • the international standards are being oriented towards considering the wind turbines as "classical” generation systems, which should be able to support the grid when necessary.. This has developed a need for methods and systems for allowing wind turbines to operate under asymmetrical grid conditions.
  • Asymmetric grid voltages are a result from imbalances between the phases in a polyphase electric system. This phenomenon is quite common, in particular for weak AC systems
  • the reason for the imbalances between the phases may be e.g. a load imbalance between the phases, asymmetric transmission line impedance or a fault such as a short circuit occurring in the grid.
  • Asymmetrical grid voltages will typically yield a power ripple having a frequency twice the line frequency if the current is not properly controlled
  • a method of controlling a power converter to deliver an amount of active power and an amount of reactive power to a three-phase grid, said active and reactive power having a given power factor and a minimized power ripple comprising: providing a wind powered multi-phase generator, providing an AC-AC converter operating in a pulse-width-modulation (PW M) mode, said AC-AC converter having a set of converter input terminals connected to said multi-phase generator and a set of converter output terminals connected via a converter impedance to a set of grid input terminals of said three- phase grid, providing a control unit comprising a measurement unit for measuring current and voltage and a microcontroller running a control algorithm, and by performing the following steps: measuring the current and/or the voltage on said converter output terminals and/or on said grid input terminals by using said measurement unit and representing the current and/or the voltage by a
  • PW M pulse-width-modulation
  • both the power and the current flowing in both the AC-DC and the DC-AC converter may be controlled using a control system with a proper control algorithm
  • the current may be regulated such that it follows the sinusoidal asymmetry of the current reference.
  • the current reference is preferably chosen to correspond to a specific power, which may be held constant over a period of time
  • the voltages may be measured and used for current reference generation, in order to obtain a given power factor for a specific active power delivery, the current reference may be derived with measured or calculated voltages using the method according to the first aspect of to the present invention.
  • the generated wind power may be transferred to the grid instantaneously with a desired power factor, and the DC output voltage is maintained constant such that both the AC-DC and the DC-AC converter may perform well
  • the active power value used for current reference generation may be the output from the DC output controller as will be further described in connection with fig 3
  • the active power value may be obtained from the rotor speed control
  • a power plant control unit may give the active power value.
  • Such power plant control units are typically available and further used for grid frequency control purposes
  • the specific power factor is substantially equal to unity
  • Near unity power factor means that the reactive power is low in relation to the active power
  • the control algorithm may in this case be fed with the value zero to achieve a substantially unity power factor at the grid input terminals This means pure active power is delivered to the grid.
  • the specific power factor is substantially equal to the power factor required by the grid.
  • the current value and/or the voltage value is/are measured/estimated on the grid input terminals.
  • a current reference may be created for a specific active power, having a specific power factor required by the grid, to be transferred to the grid.
  • a constant instantaneous power may be achieved on the converter output termina!.
  • the current value and/or the voltage value is/are measured/estimated on the converter output terminals Using the measured/estimated voltage on the converter output terminal, a current reference may be created for a specific active power to be transferred having a specific power factor. By regulating the grid current to follow the current reference, a low power ripple may be achieved on the converter output terminal
  • the current value and/or the voltage value is/are measured/estimated on the converter output terminals and the grid input terminals Using the measured/estimated voltage on both the converter output terminal and the grid input terminal, a current reference may be created for a specific active power to be transferred having a specific power factor. By regulating the grid current to follow the current reference, a low power ripple may be achieved on the converter output terminal.
  • an active power, a reactive power and a power ripple can be expressed by using the current value and/or the voltage value
  • the control algorithm is preferably fed with an active power, a reactive power and a power ripple as reference signals,
  • the current reference can be calculated by solving the matrix equations as shown below in the description.
  • the power ripple is nullified.
  • power ripple is meant the active power ripple stored in the converter inductance. It is preferably minimized, i e. the control algorithm may be fed the value zero.
  • the current reference is derived from the following equation:
  • the current reference can be calculated by solving the generalized matrix equation shown above. The solution will be provided later in the description.
  • the current reference value is calculated according to
  • the power on the grid input terminal may be held constant, and average zero reactive power operation may be achieved
  • the current reference value is calculated according to
  • the power ripple on the grid input terminal may be minimized
  • the current reference vaiue is calculated according to
  • the converter output voltage signals can be estimated either from the DC output voltage together with the switch functions or from the grid AC voltages together with the inductor voltages.
  • the power on the grid input terminal may be held constant and at the same time the power ripple may be minimized
  • the current reference value is calculated according to
  • the power on the grid input terminal may be held constant, the power ripple may be minimized and the power factor may be adjusted to the power factor of the grid
  • the current reference may be different from the above if a different reactive power definition is used
  • control system comprises a dual current controller or alternatively a P+resonant controller or alternatively an iterative learning controller or yet alternatively a repetitive current controller
  • the dual controller is based on the Pl controller for continuously correcting any difference between the reference value and the measurements All the above methods are preferably implemented on a digital microcontroller.
  • a system for controlling a power converter to deliver an amount of active power and an amount of reactive power to a three-phase grid, said active and reactive power having a given power factor and a minimized power ripple said system comprising: a wind-powered multi-phase generator, an AC-AC converter operating in a pufse-width-modulation (PWM) mode, said AC-AC converter having a set of converter input terminals connected to said multi-phase generator and a set of converter output terminals connected via a converter impedance to a set of grid input terminals of said three-phase grid, a control system for measuring the current and/or the voltage on said output terminals and/or on said grid input terminals and representing the current and/or the voltage by a current value and/or a voltage value, respectively, and a microcontroller running a control algorithm generating a current reference corresponding to the specific power
  • PWM pufse-width-modulation
  • the above system may preferably be used together with any of the previously described methods
  • the AC-AC converter preferably comprises an AC-DC to DC- AC converter comprising a number of electronic switches
  • the converter impedance is used to suppress high frequency oscillations resulting from the switching operations of the electronic switches.
  • the control system preferably includes a current measurement device and a voltage measurement device, such as a current transformer or Hall type sensor and a voltage transformer, respectively
  • the measured current and voltage values may be used as input values for a microcontroller running a control algorithm
  • the control algorithm may cafculate a current reference value by using e g. the power factor, which may be calculated from the current and voltage values.
  • an AC-AC converter comprising a set of electronic switches controlled by a control system for measuring the current and/or the voltage on one or more converter output terminals and/or on one or more grid input terminals and representing the current and/or the voltage by a current value and/or a voltage value, respectively, a microcontroller running a control algorithm generating a current reference corresponding to a specific power factor by feeding the current value and/or the voltage value into the control algorithm, the microcontroller regulating the
  • the above AC-AC converter is preferably used together with the previously described methods and systems
  • the electronic switches may comprise e g IGBTs, GTOs or thyristors
  • the microcontroller may control the electronic switches to achieve an output current equal to the calculated current reference value
  • fig 1 shows a basic topology of a full-scale converter-connected wind turbine 10
  • fig. 2 shows a zoomed view of the grid-connected converter
  • fig 3 shows a block diagram view of a control system
  • Fig. 1 shows a basic topology of a full-scale converter-connected wind turbine 10
  • the wind turbine 10 is typically mounted in an elevated position such as on top of a tower due to the faster wind speed at higher altitudes
  • the wind turbine 10 comprises a drive shaft 12 connected to one or more adjustable blades 14 Any number of blades 14 may be used, but typically three blades 14 are used.
  • the blades 14 are preferably made of fiberglass or any other light and rigid material
  • the wind turbine 10 may be rotated to allow the wind to strike the blades 14 in a substantially perpendicular direction
  • the pitch of the blade 14 may be adjusted to increase or reduce the amount of wind energy captured by the blade 14 With pitch is understood the angle of which the wind strikes the blades 14
  • the drive shaft 12 is connected to the rotor of a generator 18 via a gear box 16
  • the gear box 16 steps up the low rotational speed of the drive shaft to a higher speed more suitable for the generator 16.
  • the rotational speed of the drive shaft 12 is typically in the range of 10-20 revolutions per minute
  • the rotational speed of the generator 18 is typically significantly higher
  • the most efficient rotational speed of the generator 18 is depending on the interna! characteristics and type of the generator 18 and may vary according to the number of poles of the generator 18 It is, however, possible to exclude the gear box 16 by using an appropriate multi-pole generator 18 suitable for a slow rotational speed.
  • an AC-AC converter 22 is included between the output terminals 20 of the generator 18 and the grid input terminals A
  • the converter comprises a stator-connected converter 24 operating as an active pulse-width-modulated (PWM) rectifier comprising six electronic switches S 1 , S 2 , S 3 , S 1 ' , S 2 ', S 3 ',
  • the stator-connected converter 24 rectifies the AC from the generator to DC, which in turn feeds a DC link 26
  • the DC link 24 includes a capacitor C
  • the capacitor C is used for smoothing the ripple otherwise occurring on the DC link 26 due to the switching operations
  • the DC link 26 feeds the grid-connected converter 28 operating as an inverter
  • the grid-connected converter 28 as well comprises six electronic switches S 1 , S 2 ", S 3 ", S 1 '" , S 2 '", S 3 " 1
  • a controlling unit is controlling the individual eiectronic switches.
  • the electronic switches S 1 , S 2 , S 3 , S 1 ' , S 2 ', S 3 ', S 1 " , S 2 ", S 3 ", S 1 , S 2 '", S 3 '" may preferably comprise power semiconductor switches such as e g.
  • the grid-connected converter may thus be used to provide a constant power to the grid
  • the controlling unit is connected to a measurement unit, measuring the current and voltage on the grid input terminals A
  • the grid choke 30 or alternatively converter impedance is located between the grid- connected converter 28 and the grid input terminals A
  • the grid choke 30 consists of a converter inductance L and a converter resistance R
  • the grid input terminals A are directly connected to the grid ⁇ not shown)
  • the nominal frequency of the grid is 50Hz
  • the instantaneous frequency at any time may vary a few percent in either direction of the nominal frequency
  • P z is the constant portion of the instantaneous power p z and P zc
  • P 25 are coefficients of the second order harmonic power ripple power varying with cos2 ⁇ t and respectively.
  • the subscript z may denote any of the symbols 'in', T, and 'L' from (1).
  • the average active power, average reactive power and instantaneous power ripple may be used either at the grid input terminals A or the converter output terminals B.
  • the instantaneous active power p z at any of the points of interest is given in (4) below,
  • x may stand for either the grid input voltage e, the converter output voltage V n , the voltage across the converter inductance or the voltage across the converter resistance R 1 which is the parasitic resistance of the converter inductance L.
  • the values may be averaged over a switching cycle,
  • x ⁇ , X ⁇ and i ⁇ , i j j then represent the voltages and currents projected onto the ⁇ -axis and ⁇ -axis, respectively, in SF
  • X d , x q and i d , i q represent the voltages and currents projected onto the d-axis and q-axis, respectively, in SRF.
  • nd represent the negative sequence voltage and current vectors in SF.
  • Two different reactive power definitions may be used for reactive power calculation, either the conventional reactive power definition or the instantaneous reactive power definition
  • the conventional reactive power of a three-phase system is defined as follows:
  • the instantaneous reactive power of a three-phase system is defined as follows:
  • the first equation determines the active power P z delivered at the terminal z
  • the second and third equation determines the power ripple at the terminal z
  • the fourth equation determines the reactive power at the terminal z
  • the second, third and fourth equation may be set to zero to nullify the power ripple and the reactive power at the terminal z. fn the fourth equation, either the instantaneous reactive power q z or alternatively the average reactive power q' z may be used. Both alternatives are shown in (10) separated by a comma.
  • the current commands may be obtained by solving (10) The generalized power regulation scheme (10) operating in a grid-connected converter will deliver constant power to the grid at a near unity power factor under asymmetrical grid voltages e
  • the power variables on the left hand side of (10) will be changed into output current variables.
  • switching functions u instead of using x as the variable in the matrix of (10), switching functions u may be used to ensure a constant DC output current.
  • the equation system (10) may be solved for the grid input terminals, i e. z representing the grid input terminals A and x representing the grid voltages e. P-, nQ and P ins are nullified at the grid input terminals A thus ensuring a constant instantaneous power
  • the average reactive power is regulated to zero at the grid input terminals to obtain unity vector power factor Inserting the grid voltages e in (10) yields the following equation system (1 1a)
  • the first proposed power control scheme will ensure a constant power at the grid input terminals A with a sinusoidal line current at a substantial unity power factor.
  • the instantaneous power ripple in the inductor L is not equal to zero and may exchange with the dc-iink capacitor C. This may result in a small voltage ripple on the dc-iink voltage ven when using a large capacitor C
  • the ripple power is nullified at the converter output terminals B for obtaining constant power p D c » -
  • z denotes the converter output terminals B
  • x denotes converter output voltages v n in eq. ( 10).
  • (12b) assumes that the voltages at the rectifier-bridge input terminals are known. However, these voltages are not smooth but include a very large switching ripple due to the operation of the switches in the rectifier Thus, it is preferable to express (12b) in terms of supply input voltages rather than rectifier-bridge input voltages
  • (12b) determines the values of the current commands given the desired DC output power p * ⁇ and the converter voltages
  • the current commands may be derived given the grid voltages e:
  • Each component of the current commands in equation 12c has two parts, where the first part is proportional to the corresponding voltage component and the second part is proportional to the corresponding orthogonal voltage component.
  • the first term contributes to the constant power portion of the power P 1n at the grid input terminals, while the second term contributes to the oscillatory power in the inductor L.
  • the first term in each current component in equation 12c is the complete solution in the case of the first proposed power regulation scheme. Therefore, the second proposed current regulation scheme accounts for the ripple power in the inductors thereby ensuring that a constant power is transferred to the grid.
  • the first and fourth equations in (13a) are satisfied at the grid input terminal A.
  • the second and third equations in (13a) are satisfied at the converter output terminal B-
  • the first equation in (13a) determines the active power P ⁇
  • the second and third equations in (13a) are nullifying the ripple power P Tc and P Ts
  • the fourth equation in (13a) nullifies the reactive power q in
  • the converter output voltage signals may be estimated either from the DC output voltage together with the switch function or the grid AC voltages with inductor voltages as follows:
  • the previously shown power regulation schemes may improve both input performance and output performance with respect to constant power delivery and minimization of power ripple and reactive power.
  • the current references are derived under asymmetrical operation conditions of the grid.
  • a current controller may be constructed using dual current control in both positive sequence SRF and negative sequence SRF.
  • the proposed scheme can achieve reactive power compensation by adding the required reactive power value in the fourth equation of (10) as shown below in (15)
  • the first equation in (14.a) determines the active power P z delivered.
  • the second and third equation determine the power ripple, P zc and P 23 , which should be nullified at the terminal z.
  • the fourth equation is employed to regulate the average reactive power to the desired value corresponding to the reactive power of the grid.
  • the current commands may be obtained by solving (14 a) This is a generalized power regulation scheme for delivering constant power with reactive power compensation for operating a grid-connected converter under asymmetrical grid voltages.
  • Fig. 3 shows a block diagram view of a dual current controller 40 suitable for implementing the control schemes described above.
  • the grid input voltage e and the grid input current i are measured and fed to a calculation unit 42 deriving the transformed current values and The current reference values k and are calculated by a current command generator 54
  • the transformed current values i d and i q and the current reference values i d * and i q * are fed to a set of four Pl controllers 46, where two Pl controllers are used for the positive sequence and the other two Pl controllers are used for the negative sequence to calculate a voltage control signal V * .
  • the voltage control signal V* is fed to a PWM unit comprising a control block 48 and the grid-connected converter 24'.
  • the proposed control scheme may be implemented on a micro-controller/DSP based digital control system with suitable sampling and switching frequency.
  • a micro-controller/DSP based digital control system with suitable sampling and switching frequency.
  • current e.g. dual current control, P+resonant controller, feedback + resonant controller and iterative learning controller.
  • the first, second and third power regulation scheme of the first, second and third embodiment of the invention may be used to obtain reactive power compensation by using (15) to calculate the current commands.
  • the current controller may be constructed using dual current control in both positive sequence synchronously rotating frame (SRF) and negative sequence SRF.
  • another controller than a PI controller may be constructed for the current control loop, e.g. an AC-regulator in a stationary cc- ⁇ frame or in a three- phase a-b-c frame
  • a full-scale converter-connected wind turbine should be understood to mean a wind turbine connected to an asynchronous or synchronous generator where the stator of the generator is connected to a converter.
  • the converter setup described above makes an AC-DC-AC conversion and comprises 12 electronic switches.
  • an AC-AC conversion may be implemented without the DC link, e.g. by using matrix converter.
  • the generator can be multi-phase generator such as 3-phase generator or a 6- phase generator.
  • a 3-phase generator is used, however, the same control scheme for the grid-connected converter can be applied using any type of multi-phase generator.
  • the above contra! algorithms are preferably implemented on a control unit such as a microcontroller or computer.
  • the calculation unit performs the calculations Preferably digital technologies are used

Abstract

La présente invention concerne un procédé de contrôle d'un convertisseur de puissance (22) destiné à amener le convertisseur à délivrer une quantité de puissance active et une quantité de puissance réactive à un réseau triphasé (A). Le procédé consiste à fournir un générateur éolien multiphase (18) et un convertisseur CA-CA (22) fonctionnant dans un mode de modulation d'impulsions en durée (PWM). Le convertisseur CA-CA comprend un ensemble de bornes d'entrée de convertisseur (20) qui sont reliées au générateur triphasé, et un ensemble de bornes de sortie de convertisseur (28) qui sont reliées via une impédance de convertisseur (L, R) à un ensemble de bornes d'entrée de réseau du réseau triphasé (A). Le procédé consiste par ailleurs à proposer une unité de contrôle (40) comprenant une unité de mesure adaptée pour mesurer un courant et une tension, et un microcontrôleur (42, 44, 48) exécutant un algorithme de contrôle pour générer une valeur de référence de courant. L'unité de mesure mesure le courant et/ou la tension aux bornes de sortie du convertisseur et/ou aux bornes d'entrée du réseau. Le convertisseur CA-CA régule le courant sur les bornes d'entrée du réseau de façon à ce qu'il corresponde à la valeur de référence de courant.
PCT/IB2008/053220 2008-08-12 2008-08-12 Schéma de régulation de puissance d'un convertisseur alimentant un réseau asymétrique WO2010018424A1 (fr)

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Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US8121739B2 (en) 2010-12-29 2012-02-21 Vestas Wind Systems A/S Reactive power management for wind power plant internal grid
EP2485358A1 (fr) 2011-02-07 2012-08-08 Siemens Aktiengesellschaft Système et procédé pour atténuer un déséquilibre électrique d'un courant triphasé dans un point de couplage commun entre un parc éolien et un réseau électrique
CN103312184A (zh) * 2012-03-09 2013-09-18 台达电子工业股份有限公司 一种功率电路、变流器结构及其风力发电系统
US10033318B2 (en) 2015-08-31 2018-07-24 Otis Elevator Company Controller self-commissioning for three-phase active power electronics converters
WO2018228655A1 (fr) * 2017-06-14 2018-12-20 HBM Netherlands B.V. Définition de la puissance active sur la base d'une fréquence de commutation

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20070108877A1 (en) * 2005-11-11 2007-05-17 Herberto Bergmann Common structure and door for multiple door electrical enclosure latching systems

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20070108877A1 (en) * 2005-11-11 2007-05-17 Herberto Bergmann Common structure and door for multiple door electrical enclosure latching systems

Non-Patent Citations (4)

* Cited by examiner, † Cited by third party
Title
BO YIN ET AL: "An Output-Power-Control Strategy for a Three-Phase PWM Rectifier Under Unbalanced Supply Conditions", IEEE TRANSACTIONS ON INDUSTRIAL ELECTRONICS, IEEE SERVICE CENTER, PISCATAWAY, NJ, USA, vol. 54, no. 5, 1 May 2008 (2008-05-01), pages 2140 - 2151, XP011204606, ISSN: 0278-0046 *
HONG-SEOK SONG ET AL: "Dual Current Control Scheme for PWM Converter Under Unbalanced Input Voltage Conditions", IEEE TRANSACTIONS ON INDUSTRIAL ELECTRONICS, IEEE SERVICE CENTER, PISCATAWAY, NJ, USA, vol. 46, no. 5, 1 October 1999 (1999-10-01), XP011023580, ISSN: 0278-0046 *
RASHID, MUHAMMAD: "POWER ELECTRONICS HANDBOOK", 2007, ELSEVIER, AMSTERDAM, ISBN: 978-0-12-088479-7, XP002529166 *
YONGSUG SUH ET AL: "A nonlinear control of the instantaneous power in dq synchronous frame for PWM AC/DC converter under generalized unbalanced operating conditions", CONFERENCE RECORD OF THE 2002 IEEE INDUSTRY APPLICATIONS CONFERENCE. 37TH IAS ANNUAL MEETING . PITTSBURGH, PA, OCT. 13 - 18, 2002; [CONFERENCE RECORD OF THE IEEE INDUSTRY APPLICATIONS CONFERENCE. IAS ANNUAL MEETING], NEW YORK, NY : IEEE, US, vol. 2, 13 October 2002 (2002-10-13), pages 1189 - 1196, XP010610031, ISBN: 978-0-7803-7420-1 *

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US8121739B2 (en) 2010-12-29 2012-02-21 Vestas Wind Systems A/S Reactive power management for wind power plant internal grid
EP2485358A1 (fr) 2011-02-07 2012-08-08 Siemens Aktiengesellschaft Système et procédé pour atténuer un déséquilibre électrique d'un courant triphasé dans un point de couplage commun entre un parc éolien et un réseau électrique
CN103312184A (zh) * 2012-03-09 2013-09-18 台达电子工业股份有限公司 一种功率电路、变流器结构及其风力发电系统
US9577545B2 (en) 2012-03-09 2017-02-21 Delta Electronics, Inc. Power circuit, converter structure and wind power generation system thereof
US10033318B2 (en) 2015-08-31 2018-07-24 Otis Elevator Company Controller self-commissioning for three-phase active power electronics converters
WO2018228655A1 (fr) * 2017-06-14 2018-12-20 HBM Netherlands B.V. Définition de la puissance active sur la base d'une fréquence de commutation

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