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WO2003073595A1 - Commande vectorielle d'un convertisseur electronique de puissance - Google Patents

Commande vectorielle d'un convertisseur electronique de puissance Download PDF

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Publication number
WO2003073595A1
WO2003073595A1 PCT/FI2003/000120 FI0300120W WO03073595A1 WO 2003073595 A1 WO2003073595 A1 WO 2003073595A1 FI 0300120 W FI0300120 W FI 0300120W WO 03073595 A1 WO03073595 A1 WO 03073595A1
Authority
WO
WIPO (PCT)
Prior art keywords
voltage
rectifier
reference value
power converter
network
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.)
Ceased
Application number
PCT/FI2003/000120
Other languages
English (en)
Inventor
Pekka Jahkonen
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.)
Kone Corp
Original Assignee
Kone Corp
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 Kone Corp filed Critical Kone Corp
Priority to AU2003248363A priority Critical patent/AU2003248363A1/en
Publication of WO2003073595A1 publication Critical patent/WO2003073595A1/fr
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

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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
    • H02M5/453—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
    • 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
    • H02M7/02—Conversion of AC power input into DC power output without possibility of reversal
    • H02M7/04—Conversion of AC power input into DC power output without possibility of reversal by static converters
    • H02M7/12—Conversion of AC power input into DC power output without possibility of reversal by static converters using discharge tubes with control electrode or semiconductor devices with control electrode
    • H02M7/21—Conversion of AC power input into DC 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
    • H02M7/217—Conversion of AC power input into DC 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

Definitions

  • the present invention relates to vector control of an electronic power converter as defined in the preamble of claim 1 for the control of a converter comprised in an electric drive connected to an alternating-current power network.
  • filters composed of passive components are generally used between the power network and the electronic power converter to filter harmonics.
  • the simplest form of such a filter consists of an inductance only, but more complex filter structures, such as various low-pass filters are often used.
  • the amount of reactive power taken from the power network by an electric device can be observed by utilizing a filter connected between the power network and the electronic power converter as mentioned above and by observing and controlling the input voltage of the electronic power converter, which has a direct effect on the power factor of the electric device.
  • the object of the present invention is to eliminate the drawbacks associated with the above-described control arrangement, among other things.
  • Another object of the invention is to achieve a new arrangement for vector control of an electronic power converter.
  • the invention concerns an arrangement for vector control of an electronic power converter comprised in an electric drive connected to an alternating-current electric network, said electric drive comprising a filter connected before the electronic power converter as seen in the direction of supply of power and said electronic power converter comprising a rectifier and an inverter, which arrangement for vector control of an electronic power converter comprises a control unit for implementing the converter control so that the phase angle of the alternating voltage fed into the rectifier is adjusted to minimize the parasitic current supplied from the network, and which arrangement for vector control of an electronic power converter comprises means for measuring the network voltage and the output voltage of the rectifier.
  • the control unit of the electronic power converter comprises at least:
  • a unit for processing the network voltage comprising:
  • bl means for detecting network voltage phase data
  • b2 means for detecting network voltage phase data
  • b2 a first converter, in which the discrete sine wave reference values read from the storage unit on the basis of phase data and a measured network voltage value are multiplied with each other, producing a network voltage reference value as a result
  • cl means for generating a current setpoint value from the measured rectifier output voltage
  • the invention has the advantage that it allows vector control to be implemented compactly with a small number of components and in a low-cost manner.
  • An additional advantage of the invention is that it can be implemented without expensive current measuring sensors.
  • a further advantage is the speed of the adjusting action.
  • Fig. la presents a block diagram of an electric drive in which vector control of a rectifier according to the invention is applied;
  • Fig. lb is a vector representation of the input voltages of the electric drive;
  • Fig. 2 presents a filter comprised in the electric drive, and
  • Fig. 3 presents a block diagram representing vector control of the rectifier for one phase.
  • Fig. 1 presents a visual example of an electric drive employing vector control of a rectifier according to the invention.
  • the electric drive comprises a filter 2, a rectifier 3, an inverter 4, a three-phase electric motor 9 as the main electric device and a control unit 5 for controlling the electronic power converter.
  • a filter 2 for the sake of clarity, only the first phase l 1 of the three-phase electric network 1 is shown.
  • the second l 2 and third l 3 phases of the electric network 1 are identical with the first phase l 1 .
  • Each phase 1 , 1 , 1 of the electric network 1 is connected, in power supply direc- tion, via a filter 2; 2 , 2 , 2 to the rectifier 3.
  • the rectifier 3 is again connected via the direct-current or DC intermediate circuit 6 to the inverter 4 and further to each phase of the three-phase electric motor 9.
  • the vector control of the electronic power converter according to the invention is implemented by means of the control unit 5, which is connected between the three-phase electric network 1 and the dc intermediate circuit 6 to control the rectifier 3 by signal U ct] .
  • the function of the filter 2; 2 1 , 2 2 , 2 3 is to eliminate those disturbances that are caused by the converters 3, 4 and the three-phase electric motor 9 and propagate towards the electric network 1.
  • the filter 2 can be represented by an electrical model as presented in Fig. 2, consisting of a series connection of a first resistance 10, a first inductance 11, a second inductance 12, a second resistance 13 and a capacitance 14 connected from between them to ground.
  • the filter 2 behaves like a pure inductance, but at the high switching frequencies (about 4 kHz) of the rectifier 3, the capacitance 14 also affects the operation of the filter 2. For this reason, the resonant frequency of the filter 2 should be lower than this, e.g. 1 kHz.
  • the voltage present across the filter 2 i.e. the voltage drop dU is the difference between the voltage U of the electric network 1 (phase voltage) and the input voltage U s of the rectifier 3 (cf. Fig. lb).
  • the amount of reactive power taken by the electric drive from the electric network and therefore the coefficient of efficiency of the electric drive can be influenced by varying the phase angle ⁇ of the input voltage U s , i.e. the voltage vector of the control.
  • the rectifier 3 is controlled by means of a control unit
  • FIG. 3 A block diagram of the control unit 5 is shown in Fig. 3.
  • the network voltage U (phase voltage) of the electric network 1 and the voltage U d of the intermediate circuit 6 are measured using suitable measuring devices, such as a first and a second measuring unit 7, 8.
  • the results of these voltage measurements are input to the control unit 5.
  • the measuring units 7, 8 preferably form part of the control unit 5, but alternatively they may also be located outside the control unit 5.
  • the control unit comprises at least the following functional units.
  • the control unit 5 comprises a storage unit 15, in which are stored the discrete sine wave amplitude reference values corresponding to different phase angle values.
  • the storage unit 15 is preferably implemented as a programmable read-only memory unit PROM.
  • the control unit 5 also comprises a unit 19 for processing the rectifier output voltage U , comprising: means 20 for producing a current setpoint value I d from the measured rectifier output voltage U d and a second converter 21.
  • Discrete sine wave amplitude reference values ul, u2, u3,..., un are read from the storage unit 15 on the basis of the phase data ⁇ (U) as above, and they are also utilized in this rectifier output voltage U d processing unit.
  • the discrete sine wave amplitude reference values ul, u2, u3,..., un read from the storage unit 15 on the basis of phase data ⁇ (U) and the current setpoint value I d are multiplied by each other in the second converter 12.
  • the result obtained from this converter 21 is called current reference value I ref .
  • the current reference value I ref is in phase or 180 degrees out of phase with the network voltage reference value U ref because their sine waveform vectors are produced by a common storage unit 15.
  • the first and second converters 18, 21 are preferably multiplying digital-to-analog converters, i.e. DA converters.
  • control unit 5 comprises a predictor 22, a summing unit 23 and a pulse width modulator 24.
  • the filter 2 is modeled by the predictor 22, and the trans- fer function sL + R of the filter 2 is implemented by the predictor.
  • the predictor 22 is preferably implemented as an operational amplifier.
  • the network voltage reference value U ref and the filter output voltage reference value U sref are input to the summing unit 23, the output signal of which represents a rectifier voltage reference value U dref .
  • This reference value U dref is input to the pulse width modulator 24, whose output produces the control signal U ctl to be input to the rectifier 3.
  • the rectifier 3 is implemented in the same way as the inverter 4.
  • the rectifier 3 comprises a bridge circuit with a controllable switch, preferably a power semiconductor switch, such as a thyristor, triac, IGBT of MOSFET, connected to each arm of the bridge.
  • the semiconductor switches are so controlled that the switches of opposite arms are simultaneously on (i.e. in conducting state) and correspondingly off (in non-conducting state), these states alternating.
  • the durations of the non-conducting and conducting states are adjusted for each phase by means of the pulse width modulator 24 and thus by means of the control signal U in a manner known in itself.
  • the rectifier 3 is here arranged to function as a power converter which first converts the alternating voltage supplied from the network into direct voltage and then the direct voltage into a compensating alternating voltage having a desired phase angle to be fed into the electric network.
  • the result thus obtained is an alternating voltage U s supplied to the rectifier, having a phase angle ⁇ so adjusted that the parasitic current is minimized.
  • the means for 17 detecting network voltage phase data are preferably implemented using a phase-locked loop PLL 17a and a phase counter 17b connected after it.
  • the control unit 5 the result of the measurement of the network voltage U is input to the phase-locked loop 17a, which synchronizes the phase of the network voltage reference value U ref with the phase ⁇ (U) of the network voltage U of the electric network 1.
  • the phase counter 17 is controlled on the basis of the data produced by the phase- locked loop 17a, and the phase counter produces the phase data ⁇ (U) to be input to the storage unit 15.
  • the means 20 for producing a current measurement value I d from the measured rectifier output voltage U d are preferably implemented using a suitable intermediate circuit.
  • the measured value of the output voltage U d is now converted into a corresponding current measurement value I d .
  • the control unit 5 of the electronic power converter is provided with current feedback I f .
  • the control unit additionally comprises a current controller 25, to which the current feedback I ft , k is connected.
  • the current controller 25 an improved current reference value I ⁇ p is produced on the basis of the current feedback l ⁇ k and the current reference value I ref .
  • the invention has been mainly described in connection with an electric drive connected to a three-phase network, but it is obvious that it can be ap- plied in both single-phase and multi -phase networks by duplicating the above- described single-phase application to several phases.
  • the commutation delays of the electronic power converter as well as the fluctuation of the DC intermediate circuit can be compensated by using a voltage control system comprised in a three-phase electric drive.

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  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Rectifiers (AREA)

Abstract

l'invention concerne un agencement de commande d'un redresseur (3) faisant partie d'un entraînement électrique. Un filtre (2) est connecté avent le convertisseur électronique de puissance (3, 4). Le convertisseur électronique de puissance comprend un redresseur (3) et un inverseur (4). La commande vectorielle du convertisseur électronique de puissance comprend une unité de commande (5) destinée à mettre en oeuvre la commande du convertisseur de puissance de manière à ce que l'angle de phase de la tension alternative (Us) alimentant le redresseur (3) soit réglée afin de minimiser le courant parasite provenant du réseau. L'agencement d'une commande vectorielle d'un convertisseur électronique de puissance comprend des moyens (7, 8) de mesure de la tension du réseau et de la tension de sortie du redresseur. Selon l'invention, l'unité de commande (5) du redresseur comprend au moins : une unité de stockage (15), dans laquelle des valeurs de référence d'onde sinusoïdale discrète (u1, u2, u3, , un) sont stockées, une unité (16) de traitement de la tension du réseau et une unité (19) de traitement de la tension de sortie du redresseur, où les valeurs de référence d'onde sinusoïdale lues à partir de l'unité de stockage (15) en fonction des données de phase (ζ(U)) et de la valeur mesurée de la tension du réseau (Um) et la valeur correspondante de référence de courant (Id) produite à partir de la tension de sortie mesurée du redresseur, sont multipliées l'une avec l'autre, résultant en une valeur de référence de tension de réseau (Uréf) et en une valeur de référence de courant correspondante (Idréf), une unité de prédiction (22) destinée à modeler le filtre (2), dans lequel la valeur de référence de courant (Idréf) est entrée et qui produit en résultat une valeur de référence (Usréf) pour la tension de sortie du filtre, une unité de sommation (23) dans laquelle sont entrées la valeur de référence de tension de réseau (Uréf) et la valeur de référence de tension de filtre (Usréf), le signal de sortie de cette unité de sommation représentant la valeur de référence (Udréf) de la tension du redresseur, et un modulateur de largeur d'impulsion (24) dans lequel est entrée la tension de référence de tension du redresseur (Udréf) afin d'obtenir un signal de commande (10) destiné à commander le redresseur (3).
PCT/FI2003/000120 2002-02-28 2003-02-19 Commande vectorielle d'un convertisseur electronique de puissance Ceased WO2003073595A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AU2003248363A AU2003248363A1 (en) 2002-02-28 2003-02-19 Vector control of an electronic power converter

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FI20020388A FI112007B (fi) 2002-02-28 2002-02-28 Suuntaajan vektoriohjaus
FI20020388 2002-02-28

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Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
RU2394346C1 (ru) * 2008-11-24 2010-07-10 Государственное образовательное учреждение высшего профессионального образования "Новосибирский государственный технический университет" Векторный способ управления трехфазным статическим преобразователем при несимметричной нагрузке
RU2460194C1 (ru) * 2011-01-12 2012-08-27 Государственное образовательное учреждение высшего профессионального образования "Новосибирский государственный технический университет" Способ управления статическими стабилизированными источниками переменного напряжения, работающими параллельно на общую нагрузку при ее несимметрии
CN108880317A (zh) * 2018-09-12 2018-11-23 珠海泰通电气技术有限公司 一种换流器的三环控制装置及方法

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1994010744A1 (fr) * 1992-10-30 1994-05-11 Electric Power Research Institute, Inc. Unite de traitement de ligne d'alimentation active a commande de transformation synchrone

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1994010744A1 (fr) * 1992-10-30 1994-05-11 Electric Power Research Institute, Inc. Unite de traitement de ligne d'alimentation active a commande de transformation synchrone

Non-Patent Citations (2)

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Title
DELL'AQUILA A ET AL: "A fuzzy logic feed-forward current controller for PWM rectifiers", ISIE'2000. PROCEEDINGS OF THE 2000 IEEE INTERNATIONAL SYMPOSIUM ON INDUSTRIAL ELECTRONICS (CAT. NO.00TH8543), PROCEEDINGS OF 2000 INTERNATIONAL SYMPOSIUM ON INDUSTRIAL ELECTRONICS (ISIE 2000), CHOLULA, PUEBLA, MEXICO, 4-8 DEC. 2000, 2000, Piscataway, NJ, USA, IEEE, USA, pages 430 - 435 vol.2, XP002242195, ISBN: 0-7803-6606-9 *
OHNISHI T ET AL: "DC voltage and current sensorless single phase PFC converter", 2002 IEEE 33RD ANNUAL IEEE POWER ELECTRONICS SPECIALISTS CONFERENCE. PROCEEDINGS (CAT. NO.02CH37289), PROCEEDINGS OF PESC 2002 - POWER ELECTRONICS SPECIALISTS CONFERENCE, CAIRNS, QLD., AUSTRALIA, 23-27 JUNE 2002, 2002, Piscataway, NJ, USA, IEEE, USA, pages 1137 - 1142 vol.3, XP002242196, ISBN: 0-7803-7262-X *

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
RU2394346C1 (ru) * 2008-11-24 2010-07-10 Государственное образовательное учреждение высшего профессионального образования "Новосибирский государственный технический университет" Векторный способ управления трехфазным статическим преобразователем при несимметричной нагрузке
RU2460194C1 (ru) * 2011-01-12 2012-08-27 Государственное образовательное учреждение высшего профессионального образования "Новосибирский государственный технический университет" Способ управления статическими стабилизированными источниками переменного напряжения, работающими параллельно на общую нагрузку при ее несимметрии
CN108880317A (zh) * 2018-09-12 2018-11-23 珠海泰通电气技术有限公司 一种换流器的三环控制装置及方法
CN108880317B (zh) * 2018-09-12 2024-01-09 珠海泰通电气技术有限公司 一种换流器的三环控制装置及方法

Also Published As

Publication number Publication date
FI20020388A0 (fi) 2002-02-28
FI112007B (fi) 2003-10-15
AU2003248363A1 (en) 2003-09-09

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