WO2018068843A1 - Retard adaptatif d'une troisième composante harmonique - Google Patents

Retard adaptatif d'une troisième composante harmonique Download PDF

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Publication number
WO2018068843A1
WO2018068843A1 PCT/EP2016/074435 EP2016074435W WO2018068843A1 WO 2018068843 A1 WO2018068843 A1 WO 2018068843A1 EP 2016074435 W EP2016074435 W EP 2016074435W WO 2018068843 A1 WO2018068843 A1 WO 2018068843A1
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WIPO (PCT)
Prior art keywords
phase
extreme value
delay
modulation
waveform
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Application number
PCT/EP2016/074435
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English (en)
Inventor
Axel Andersson
Original Assignee
Abb Schweiz Ag
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Publication date
Application filed by Abb Schweiz Ag filed Critical Abb Schweiz Ag
Priority to PCT/EP2016/074435 priority Critical patent/WO2018068843A1/fr
Publication of WO2018068843A1 publication Critical patent/WO2018068843A1/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
    • H02M1/00—Details of apparatus for conversion
    • H02M1/12—Arrangements for reducing harmonics from ac input or output
    • 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
    • H02M7/483—Converters with outputs that each can have more than two voltages levels

Definitions

  • the present invention generally relates to voltage source converters. More particularly the present invention relates to a method, controller, voltage source converter and computer program product for controlling the phase of a third harmonic component added to a fundamental frequency component of a control signal used for controlling a phase leg of the voltage source converter.
  • phase shift of the third harmonics may as an example be necessary to shift the phase of the third harmonics in relation to the fundamental component.
  • a phase shift of this added third harmonic is not trivial. It depends on several factors, such as an operating point as defined by the power being delivered, circulating current, cell voltage ripple etc. If the third harmonic is not optimally shifted in phase, there may be negative effects since more cells than necessary need to be inserted or bypassed in order to fulfill the output voltage reference, leading to lower control margins and lower active and reactive power delivery capability of the converter.
  • the present invention is directed towards this type of flexible third harmonic phase adjustment.
  • the present invention is directed towards the adaptive adjustment of the third harmonic component of a waveform used to control a voltage source converter.
  • This object is according to a first aspect achieved through a method for controlling the phase of a third harmonic component added to a fundamental frequency component of a control signal used for forming a waveform on an AC terminal of a phase leg of a voltage source converter, the method comprising the steps of:
  • This object is according to a second aspect achieved through a controller for controlling the phase of a third harmonic component added to a fundamental frequency component of a control signal used for forming a waveform on an AC terminal of a phase leg of a voltage source converter, the controller comprising a third harmonic delay determining module operative to :
  • the object is according to a third aspect achieved through a voltage source converter comprising a controller according to the second aspect.
  • the object is according to a fourth aspect achieved through a computer program product for controlling the phase of a third harmonic component added to a fundamental frequency component of a control signal used for forming a waveform on an AC terminal of a phase leg of a voltage source converter, the computer program product comprising a data carrier with computer program code configured to cause a controller of the converter to:
  • the present invention has a number of advantages. It allows an optimal phase shift of the third harmonic to be obtained for all operating points. This is furthermore done adaptively as the controller is used. The controller is thereby able to adapt to instantaneous variations through using feedback of the two modulation references. This is also achieved with limited additions to the controller. It only requires limited additional software in order to be implemented.
  • fig. l schematically shows a voltage source converter that may be controlled using a voltage reference comprising a third harmonic frequency component combined and a fundamental frequency component
  • fig. 2 shows a block schematic of a controller for controlling the voltage source converter
  • fig. 3 schematically shows a control loop for controlling a phase leg and comprising modules comprising a delay determining module and various blocks of a third harmonic waveforming control module,
  • fig. 4 shows a modulation reference used for an upper phase arm and a modulation reference used for a corresponding lower phase arm of a phase leg of the converter
  • fig. 5 shows the two half periods of the voltage reference
  • fig. 6 schematically shows a first and second extreme value formed for the two half periods in relation to the modulation references
  • fig. 7 shows the modulation references after delaying the phase of the third harmonic component using a delay determined by the delay determining module
  • fig. 8 shows a flow chart of a number of method steps performed by the delay determining module.
  • fig. 9 shows a block schematic of a combination of the delay determining module together with a combined fundamental and third harmonic waveforming control block
  • fig. io schematically shows a computer program product comprising computer program code for forming the controller.
  • the present invention is directed towards the adding of third harmonics to a basic reference waveform used to control a voltage source converter.
  • This basic reference waveform may with advantage be sinusoidal and provide a fundamental frequency.
  • a control signal that comprises a fundamental frequency component and a third harmonic frequency components is obtained and used.
  • a voltage source converter where such control is used may as an example be provided in a converter station that provides an interface between a direct current (DC) network and an Alternating Current (AC) network, where the DC network for instance may be a High Voltage Direct Current (HVDC) network.
  • DC direct current
  • AC Alternating Current
  • the converter station may also be an HVDC converter station.
  • Such a converter station may also comprise an AC line connected between a secondary side of a transformer and an AC side of the converter, where the primary side of the transformer is connected to the
  • AC network and a DC side of the converter is connected to the DC network.
  • the DC network may in turn be a transmission network covering long distances, for instance in order to transfer power over these long distances.
  • the converter 10 may be a three-phase voltage source converter for converting between AC and DC.
  • the converter 10 may therefore comprise three phase legs PLi, PL2 and PL3, for instance connected in parallel between a first and a second DC terminal DCi and DC2, where the first DC terminal DCi may be connected to a first pole of the DC network and the second DC terminal DC2 may be connected to a second pole of the DC network or to ground.
  • Each phase leg furthermore comprises a set of converter valves, which in this example is a pair of converter valves.
  • the first phase leg PLi therefore comprises a first and a second converter valve CVAi and CVA2
  • the second phase leg comprises a first and a second converter valve CVBi and CVB2
  • the third phase leg PL3 comprises a first and a second converter valve CVCi and CVC2.
  • the mid points of the phase legs are connected to
  • phase leg is in this example divided into two halves, a first upper half and a second lower half, where such a half is also termed a phase arm.
  • the first DC pole furthermore has a first potential that may be positive.
  • the first pole may therefore also be termed a positive pole.
  • a phase arm between the first DC terminal DCi and a first, second or third AC terminal ACi, AC2 and AC3 may be termed a first phase arm or an upper phase arm, while a phase arm between the first, second or third AC terminal ACi, AC2 and AC3 and the second DC terminal DC2 may be termed a second phase arm or a lower phase arm.
  • the phase arm mid points may
  • the upper phase arms may be joined to the first DC terminal DCi via a corresponding first or upper arm reactor LAi, LBi and LCi, while the lower phase arms may be joined to the second DC terminal DC2 via a second or lower arm reactor LA2, LB2 and LC2.
  • the voltage source converter 10 may be a two-level converter, where each converter valve is made up of a number of series connected switching units.
  • the converter may be a modular multilevel converter (MMC) where each converter valve is formed through a series-connection of a number of cells, where a cell may be a half-bridge cell or a full-bridge cell.
  • MMC modular multilevel converter
  • a cell then comprises one or two strings of series connected switching units in parallel with an energy storage element like a capacitor.
  • a switching unit may be realized in the form a transistor with anti-parallel diode.
  • a converter may for instance be an n-level converter, such as a neutral point clamped three-level converter.
  • a modular multilevel converter may be made up of a number of different types of cells.
  • hybrid converters that use cells in an n- level environment.
  • controller 12 which controls the operation of the converter 10 and more particularly controls each converter valve.
  • the controller 12 is provided for controlling all the phase arms of the converter.
  • the control of the first converter valve CVAi of the upper phase arm and the second converter valve CVA2 of the lower phase arm of the first phase leg PL is indicated.
  • the operation according to aspects of the invention will later be described in relation to the two converter valves CVAi and CVA2. It should be realized that all converter valves are controlled by the controller 12.
  • the controller 12 may be implemented through a computer or a processor with associated program memory or dedicated circuit such Field-Programmable Gate Arrays (FPGAs).
  • FPGAs Field-Programmable Gate Arrays
  • Fig. 2 shows a block schematic of one way of realizing controller 12.
  • the controller 12 comprises a fundamental waveforming control module FWF 14, a third harmonics waveforming control module 3HWF 16 and a third harmonics delay determining module 3HD 18.
  • the fundamental waveforming control module FWF 14 comprises a fundamental waveforming control module FWF 14, a third harmonics waveforming control module 3HWF 16 and a third harmonics delay determining module 3HD 18.
  • waveforming control module 14 is used for forming a fundamental component of a waveform such as a sine wave, while the third harmonics waveforming control module 16 is used for forming a third harmonics component of the waveform, which component may likewise be a sine wave.
  • the modules 14 and 16 are here shown as being separate from each other. However, as will be shown later, their functionality may as an alternative be combined into one module.
  • the fundamental waveforming control module 14 is thus used for forming a fundamental component of a waveform to be output via an AC terminal of the converter, which in this example is the first AC terminal ACi.
  • the fundamental waveforming control module 14 determines a modulation or voltage reference representing the fundamental voltage of the waveform that is to appear on the AC terminal and which fundamental component is also to be conveyed to the AC network.
  • a typical frequency of such a fundamental wave is 50 Hz. However, also other frequencies may be used, such as 60 Hz. To this component the third harmonics
  • waveforming control module 16 then adds zero sequence third harmonics. These harmonics are thereafter removed before entering the AC system, for instance using the previously mentioned transformer.
  • the third harmonic component is added to the fundamental component in order for the converter to produce an output signal on the AC side resembling the basic reference waveform with added harmonic component, where the basic reference waveform is with advantage sinusoidal.
  • One reason for this addition is that it reduces the peak value of the modulation reference, thereby allowing an increase of the modulation range, i.e. an increase of the converter output voltage.
  • the most common harmonic component added is a zero-sequence third harmonic having the opposite polarity or opposite sign in relation to the polarity or sign of the fundamental component. It is also possible to add higher order harmonics that are multiples of three (and too are zero sequence). However the third harmonic has the highest influence.
  • the converter basic reference waveform u T which is with advantage the output voltage reference, is for one of the three phases ideally given by where ⁇ ⁇ is the fundamental angular frequency and U v is the fundamental reference amplitude or the output AC voltage amplitude. Then the optimal third-harmonic addition is - in the sense that the peak value of the basic reference waveform is reduced as much as possible -
  • the fundamental waveforming control module 14 is set to provide the voltage reference of equation (1) and the combination of fundamental waveforming control module 14 and third harmonics waveforming control module 16 together provide the voltage reference in equation (2).
  • the fundamental waveforming control module also determines a phase ⁇ of the fundamental component.
  • the third harmonic is not optimally shifted in phase in a modular multilevel converter, there may be negative effects because more cells than necessary may need to be inserted or bypassed in order to fulfil the output voltage reference, leading to lower control margins and lower active and reactive power delivery capability of the converter.
  • aspects of the invention are directed towards adaptively adjusting the phase of the added third harmonics.
  • fig. 3 shows a block schematic of a control loop for controlling a phase leg comprising the delay determining module 18 and various blocks of the third harmonic waveforming control module 16 as well as some further blocks for combining the waves and forming modulation references.
  • the voltage reference Uv_ref representing the fundamental component is provided by the fundamental waveforming control module 14 to an amplitude calculating block 20 of the third harmonic waveform control module 16 as well as to a first summing block 26.
  • the amplitude calculating block 20 determines the amplitude of the fundamental voltage reference and supplies it to a multiplying block 22 of the third harmonic waveform control module 16, which multiplies the amplitude with a set value k, which as an example is the value of 1/6, in order to obtain the amplitude of the third harmonic component in relation to the amplitude of the fundamental component.
  • the amplitude k is then supplied to a third harmonic waveforming control block 24 of the third harmonic waveform control module 16.
  • the delay determining module 18 in turn determines a delay ⁇ of the third harmonic waveform contribution and also supplies this delay ⁇ to the third harmonic waveforming control block 24. The way the delay ⁇ is being determined will be described shortly.
  • the third harmonic waveforming control block 24 generates a voltage reference representing the third harmonic component and having the amplitude k and a phase that is delayed with the delay ⁇ .
  • the voltage reference representing the third harmonic component is then supplied to the first summing block 26.
  • the summing block 26 then sums the fundamental voltage reference Uvref and the third harmonic voltage reference in order to obtain the signal Uv_ref_tot, which is a reference signal comprising both the fundamental and third harmonic component.
  • the first summing block 26 in turn supplies the voltage reference signal Uv_ref_tot to a modulation reference calculating block 27, which determines a modulation reference R_P for the upper phase arm and a modulation reference R_N for the lower phase arm using the voltage reference signal Uvref_tot. How such modulation references may be determined is known and will therefore not be described in any further detail.
  • the references are then used for controlling the upper and lower phase arm valves CVAl and CVA2 in a known fashion for instance using Pulse Width Modulation (PWM).
  • PWM Pulse Width Modulation
  • These modulation references R_P and R_N are also provided to the third harmonic delay determining module 18.
  • the modulation references may each vary between +1 and -1.
  • the fundamental waveforming control module also provides the phase ⁇ of the fundamental component to the delay determining module 18.
  • fig- 4, 5, 6, 7 and 8 show how the delay may be formed by the delay determining module 18 in some more detail with reference also being made to fig- 4, 5, 6, 7 and 8, where fig. 4 shows the modulation reference R_P used for the upper phase arm and the modulation reference R_N used for the corresponding lower phase arm, fig 5 shows the two half periods of the generated waveform WF, fig. 6 schematically shows the first and second extreme value formed for the two half periods based on the modulation references, fig. 7 shows the modulation references after delaying the phase of the third harmonic component and fig. 8 shows a flow chart of a number of method steps being performed by the delay determining module 18.
  • the delay determining module 18 uses the modulation references R_P and R_N of the positive and negative arms in order to determine the delay ⁇ . In order to do this it obtains the modulation reference R_P of the positive phase arm, step 30, and it obtains the modulation reference R_N of the negative phase arm, step 32, which in this embodiment is done through receiving them from the modulation reference calculating block 28. It thus obtains the modulation reference R_P of the control signal Uvref_tot used for the upper phase arm of the phase leg and the modulation reference R_N of the control signal Uvref_tot used for the lower phase arm of the phase leg PLIT
  • Figure 4 shows the modulation references R_P and R_N for a certain operating point, such as a certain level of active power P and/or a certain level of reactive power being delivered by the converter 10. From these signals, the delay determining module 18 determines which of the upper and lower phase arm reference has the highest value.
  • the determination of highest value is more particularly performed for different half periods, where the division into half-period may be made based on an extreme value of the fundamental component.
  • one border between two half-periods is at the positive peak or maximum of the fundamental component and the other at the negative peak or minimum of the fundamental component as shown in Figure 5.
  • Each half period may therefore stretch between the maximum and minimum of the fundamental component.
  • the wave shown in fig. 5 is a wave comprising both fundamental and harmonic components and therefore the peak of the fundamental component is not the peak of the waveform but a local minimum between two waveform peaks.
  • the phase angle ⁇ of the fundamental wave may in this case be used to set the point where the border between a first and a second half period HPi and HP2 is to occur.
  • the first half period HPi which is here a half period with rising voltage
  • the second half period HP2 which is here a half period with falling voltage, is enclosed in a solid box in the figure.
  • the delay determining module 18 thereafter determines a first extreme value EVi in the first half period HPi based on the modulation references R_P and R_N for the upper and lower phase arms in this half period HPi, step 34, and determines a second extreme value EV2 in the second half period HP2 based on the modulation indexes R_P and R_N for the upper and lower phase arms in this half period HP2, step 36.
  • the delay determining module 18 determines the first extreme value EVi as the highest value of the two modulation references in the first half period and the second extreme value EV2 as the highest of the two modulation references in the second half period.
  • the determining of the first and second extreme values may thus comprise a determining of which of the upper and lower phase arm modulation references R_P, R_N has the most extreme value in the first half period HPi and which of the upper and lower phase arm modulation references R_P, R_N has the most extreme value in the second half period HP2.
  • the determining of the extreme value may thus be a determining of the most extreme of the extreme values of the two modulation references in the half period to be the extreme value of this half period, where in this embodiment the highest of the two maximum values, i.e. positive peaks, in the half period may be determined to be the extreme value of the half period.
  • the delay determining module 18 thereafter determines the difference between the first and second extreme values EVi and EV2, step 38, which difference is then processed in order to obtain a delay ⁇ , step 40.
  • the processing involves applying integrating activity on the difference, i.e. integrating the difference EVi - EV2.
  • the processed difference is then applied as the delay ⁇ to be used by the third harmonic waveforming control block 24 in relation to the fundamental wave.
  • the delay ⁇ is thus used in the adjusting of the phase of the third harmonic component in relation to the fundamental frequency component using the adjustment factor ⁇ , step 42. This will shift the phase of the added third harmonic so that the peaks of the half periods become equal, increasing control margin, thus increasing the capability of the converter, see figure 7.
  • This type of adaptive phase shift adjusting is then continuously performed, which improves the efficiency of the conversion.
  • the max value of the modulation references was decreased from 0.957 to 0.947, increasing the control margin by 1%.
  • the adjustment factor ⁇ may be is proportional to the output power P with a constant set by the other voltage source converter operational data.
  • the constant is here based on cell specifying data that defines a relationship between the number of cells in the converter, i.e. in the arms, and the cell capacitance as well as data specifying the basic reference waveform in the form of basic reference waveform angular frequency and amplitude.
  • the controller includes an adjustment factor determining block 44 that receives measured signals in the form of output power which in one embodiment of the invention is output effective power P, i.e. effective power output by the voltage source converter, fundamental system constants in the form of basic reference waveform angular frequency coi, i.e. AC system angular frequency, number N of cells in each arm of the phase legs and cell capacitance Cc, i.e. the capacitance of the capacitors in the cells of the phase legs.
  • This block 44 also receives internally generated signals including a modulation index m and basic reference waveform amplitude U v .
  • the adjustment factor determining block 44 thus obtains operational data of the voltage source converter 10, i.e. the measured value of the active output power P, the fundamental system constants, basic reference waveform angular frequency coi, phase arm cell number N and cell capacitance Cc as well as the internally generated signals modulation index m and fundamental reference waveform amplitude U v .
  • the fundamental reference waveform amplitude U v can be measured as the amplitude of the output AC voltage. It may therefore alternatively be considered as a measured value.
  • the adjustment factor determining block 44 determines an adjustment factor ⁇ that is delivered to a low pass filter 46. As can be seen above, the adjustment factor is set in relation to the operating point of the converter.
  • the low pass filter 46 in turn low pass filters the adjustment factor in order to obtain a low pass filtered adjustment factor 5F that is supplied to a first terminal of a second summing block 48.
  • the second summing block 48 also has a second positive terminal on which it receives the delay ⁇ determined by the delay determining module 18 and adds the delay ⁇ to the adjustment factor ⁇ .
  • the second summing block thus sums the adjustment factor and the delay and provides the sum ⁇ + ⁇ to a waveforming block 50, which waveforming block 50 is responsible for forming the waveform comprising both the fundamental and third harmonic components.
  • the waveforming block 50 also receives the basic reference waveform amplitude U v and angular frequency coi and the amplitude k of the third harmonic component amplitude, which is again typically 1/6.
  • the waveforming block 50 then provides the fundamental reference waveform based on the basic reference waveform angular frequency coi and amplitude.
  • the waveforming block 50 determines the frequency of the third harmonic component based on the basic reference waveform angular frequency coi and the relative harmonic amplitude k based on the amplitude of the basic reference waveform.
  • the harmonic component may also receive the opposite polarity in relation to the polarity of the fundamental reference waveform, i.e. it may receive the opposite sign in relation to the
  • the phase of the third harmonic component is shifted with a delay or phase shift 5F + ⁇ .
  • the phase shifted third harmonic component is then added to the fundamental component to form an actual reference waveform Uv_ref_tot, which is then supplied to the modulation reference calculator 28 that calculates the modulation references R_P and R_N for the upper and lower arm phase arm, which modulation references are also supplied to the delay determining module 18.
  • the modulation references are then again used to cause the cells of the voltage source converter 10 to reproduce the actual reference waveform on the first AC terminal ACi, i.e. the waveform of the fundamental reference with phase adjusted added third harmonics.
  • the cells are here each controlled to provide a voltage contribution, where the sum of the voltage contributions over time provides the waveform.
  • the controller may be realized in the form of discrete components, such as FPGAs. However, it may also be implemented in the form of a processor with accompanying program memory comprising computer program code that performs the desired control functionality when being run on the processor.
  • a computer program product carrying this code can be provided as a data carrier such as one or more CD ROM discs or one or more memory sticks carrying the computer program code, which performs the above-described control functionality when being loaded into a controller of a voltage source converter.
  • One such data carrier in the form of a CD Rom disk 52 carrying computer program code 54 is shown in fig. 10.

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  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Inverter Devices (AREA)

Abstract

Selon l'invention, un dispositif de commande qui commande la phase d'une troisième composante harmonique d'un signal de commande (Uv_ref_tot) utilisé pour former une forme d'onde sur une borne CA d'une branche de phase comprend un module de détermination de retard de troisième harmonique (18) servant : à obtenir une référence de modulation (R_P) du signal de commande pour un bras supérieur de phase de la branche de phase ; à obtenir une référence de modulation (R_N) du signal de commande pour un bras inférieur de phase de la branche de phase ; à déterminer une première valeur extrême sur la base des deux références de modulation (R_P, R_N) dans une première demi-période de la forme d'onde ; à déterminer une seconde valeur extrême sur la base des deux références de modulation (R_P, R_N) dans une seconde demi-période de la forme d'onde ; à déterminer une différence entre les première et seconde valeurs extrêmes ; à traiter la différence afin d'obtenir un retard (φ) ; et à régler la phase de la troisième composante harmonique à l'aide du retard.
PCT/EP2016/074435 2016-10-12 2016-10-12 Retard adaptatif d'une troisième composante harmonique WO2018068843A1 (fr)

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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20200244184A1 (en) * 2017-10-27 2020-07-30 Abb Schweiz Ag Control of delta-connected converter
EP4191865A4 (fr) * 2020-07-28 2023-09-27 Mitsubishi Electric Corporation Dispositif de conversion de puissance

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE10103031A1 (de) 2001-01-24 2002-07-25 Rainer Marquardt Stromrichterschaltungen mit verteilten Energiespeichern
JP2008193770A (ja) * 2007-02-01 2008-08-21 Hitachi Ltd 三相電力変換器の制御装置および制御方法と、三相交流電動機の駆動装置および駆動方法
WO2011032581A1 (fr) 2009-09-15 2011-03-24 Abb Research Ltd Ajout d'un troisième composant harmonique à une forme d'onde basique de référence
EP2876793A1 (fr) * 2013-11-22 2015-05-27 ABB Oy Procédé et dispositif permettant de réduire la contrainte de courant dans un circuit intermédiaire d'onduleur à trois niveaux
EP3008805A1 (fr) * 2013-06-14 2016-04-20 ABB Technology Ltd. Agencement, procédé et produit de programme informatique relatifs au prélèvement d'énergie d'une ligne d'alimentation cc pour l'envoyer vers une ligne d'alimentation ca

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE10103031A1 (de) 2001-01-24 2002-07-25 Rainer Marquardt Stromrichterschaltungen mit verteilten Energiespeichern
JP2008193770A (ja) * 2007-02-01 2008-08-21 Hitachi Ltd 三相電力変換器の制御装置および制御方法と、三相交流電動機の駆動装置および駆動方法
WO2011032581A1 (fr) 2009-09-15 2011-03-24 Abb Research Ltd Ajout d'un troisième composant harmonique à une forme d'onde basique de référence
EP3008805A1 (fr) * 2013-06-14 2016-04-20 ABB Technology Ltd. Agencement, procédé et produit de programme informatique relatifs au prélèvement d'énergie d'une ligne d'alimentation cc pour l'envoyer vers une ligne d'alimentation ca
EP2876793A1 (fr) * 2013-11-22 2015-05-27 ABB Oy Procédé et dispositif permettant de réduire la contrainte de courant dans un circuit intermédiaire d'onduleur à trois niveaux

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20200244184A1 (en) * 2017-10-27 2020-07-30 Abb Schweiz Ag Control of delta-connected converter
EP4191865A4 (fr) * 2020-07-28 2023-09-27 Mitsubishi Electric Corporation Dispositif de conversion de puissance

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