WO2015149866A1 - Convertisseur de courant multiniveau et procédé de commande d'un convertisseur de courant multiniveau - Google Patents

Convertisseur de courant multiniveau et procédé de commande d'un convertisseur de courant multiniveau Download PDF

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Publication number
WO2015149866A1
WO2015149866A1 PCT/EP2014/056811 EP2014056811W WO2015149866A1 WO 2015149866 A1 WO2015149866 A1 WO 2015149866A1 EP 2014056811 W EP2014056811 W EP 2014056811W WO 2015149866 A1 WO2015149866 A1 WO 2015149866A1
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WO
WIPO (PCT)
Prior art keywords
type
switching
cells
switching cells
converter
Prior art date
Application number
PCT/EP2014/056811
Other languages
English (en)
Inventor
Alireza NAMI
Filippo Chimento
Muhammad Nawaz
Original Assignee
Abb Technology Ltd
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 Abb Technology Ltd filed Critical Abb Technology Ltd
Priority to PCT/EP2014/056811 priority Critical patent/WO2015149866A1/fr
Publication of WO2015149866A1 publication Critical patent/WO2015149866A1/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
    • 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
    • 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
    • H02M1/42—Circuits or arrangements for compensating for or adjusting power factor in converters or inverters
    • H02M1/4208—Arrangements for improving power factor of AC input
    • H02M1/4241—Arrangements for improving power factor of AC input using a resonant converter
    • 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
    • H02M7/4835—Converters with outputs that each can have more than two voltages levels comprising two or more cells, each including a switchable capacitor, the capacitors having a nominal charge voltage which corresponds to a given fraction of the input voltage, and the capacitors being selectively connected in series to determine the instantaneous output voltage
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
    • Y02B70/00—Technologies for an efficient end-user side electric power management and consumption
    • Y02B70/10—Technologies improving the efficiency by using switched-mode power supplies [SMPS], i.e. efficient power electronics conversion e.g. power factor correction or reduction of losses in power supplies or efficient standby modes

Definitions

  • the present invention relates to a multi-level power converter for one or more phases.
  • the converter comprises at least one converter arm comprising a pl urality of serial connected switching cells.
  • Each switching cell comprises a plurality of switching devices and an energy storage element.
  • the switching devices are arranged to selectively provide a connection to the energy storage element.
  • the converter further comprises a controller configured to control the switching of the switching devices i n the switching cells, which switching cells comprise at least switchi ng cells of a first type and switching cells of a second type.
  • the present i nvention also relates to a method for controlling a multi-level power converter.
  • Multi-level converters are used for converting DC electric power to AC electric power or AC electric power to DC electric power. Multilevel converters are found in many high power applications in which medium to high voltage levels are present in the sys- tern.
  • the multi-level converter When forming an AC voltage from a DC voltage, the multi-level converter forms the AC voltage in small voltage steps by means of that the controller accurately controls the switching devices of the switchi ng cells. Thereby, the charging and dischargi ng of the energy storage element of the switching cells are controlled so that the converter outputs the desired AC voltage.
  • the switching devices of the switching cells are for example in- tegrated gate-commutated thyristor (IGCT), gate turn-off thyris- tor (GTO) and an insulated-gate bipolar transistor (IGBT).
  • IGCT in- tegrated gate-commutated thyristor
  • GTO gate turn-off thyris- tor
  • IGBT insulated-gate bipolar transistor
  • a further example of switching devices is wide-bandgap devices, such as silicon carbide switching devices, al uminum nitride switchi ng devices, gallium nitride switching devices and boron nitride switching devices.
  • the energy storage elements of the switchi ng cells are usually capacitors but also batteries may be used .
  • the multi-level converters are normally designed using commer- cially available switching cells that are connected in series.
  • the use of such commercially available switching cells is not optimal for high voltage applications and results in higher conduction losses and limitation in operati ng frequency of the converter compared to if optimal switchi ng cells for the convert- er would be available.
  • issues relating to unbalanced voltage sharing and control of the converter must be handled .
  • WO2013097906A1 discloses a multi-level converter comprising a plurality of switching cells arranged in arms that are connected in parallel .
  • the switching cells in the arms preferably have identical or near identical quantitative properties.
  • WO2012/1 19658A1 discloses an inverter for inverting a DC volt- age.
  • the converter comprises sub-systems each comprising an electronic switching device and a storage capacitor.
  • the object of the present invention is to provide a multi-level converter that can operate close to optimal condition using commercially available switchi ng cells.
  • a further object of the invention is to provide a multi-level converter that provides reduced conduction loss compared with state of art multi-level converters. I n particular, the invention relates to a multi-level converter for medi um and high voltage application where conduction loss and switching loss in prior art converters are significant.
  • the converter is characterized in that the switchi ng cells of the first type have lower conduction loss than the switching cells of the second type and the switching cells of the second type have higher switching frequency capability than the switching cells of the first type, wherei n the controller is ar- ranged to control the switching cells so that a main portion of the power conversion is executed by the switching cells of the first type and the remaining portion of the power conversion is executed by the switching cells of the second type.
  • the switching cells of the first type have the advantage of providing low conduction losses compared to the switching cells of the second type.
  • the switching cells of the second type have the advantage of enabling higher switching frequency with low switchi ng loss compared to the switching cells of the first type.
  • the switching cells of the first type have the function of roughly forming the converted power.
  • the switching cells of the second type have the function of shapi ng the roughly formed converted power by converting the remaining portion of the power to be converted . Thereby, the desired output converted power is formed .
  • the switching cells of the first type are operated at lower frequency than the switching cells of the second type.
  • the converter of the invention enables the converter to be operated closer to its optimal condition .
  • the invention enables manufacturing of a converter usi ng commercial available switchi ng cells, which converter has reduced energy loss compared with prior art converters.
  • the conversions of the switching cells of the first type and the switching cells of the second type are superimposed into the output converted electric power.
  • the main portion of the power conversion that is executed by the switching cells of the first type and the remaining portion of the power conversion that is executed by the switching cells of the second type are superimposed into the output converted electric power from the converter. Thereby, the quality of the converted power can be maintained while reducing the conduction loss and switching loss compared with prior art converters.
  • the controller is adapted to control the switching cells of the first type and the switchi ng cells of the second type so that the superimposed output converted electric power forms a sine waveform.
  • the superimposed output converted electric power could be other waveforms, such as square, triangle and sawtooth waveforms.
  • the switching cells of the first type are switched mainly at the zero crossings of a sine wave.
  • the conduction loss of the switchi ng cells of the first type is reduced .
  • Reducing the conduction loss of the switching cells of the first type is particular important in that the switching cells of the first type converts the main portion of the power to be converted .
  • the switching cells of the first type form a square wave or a quasi square wave of between four and eight steps modulation, preferably six steps modulation.
  • the interval of the modulation is preferable in that the switching frequency is low while allowing the switching cells of the second type to shape the converted power with appropriate quality. Accordingly, the conduction loss i n the converter is low while the quality of the power converter has appropriate quality for most applications.
  • the switching devices of the switching cells of the second type are switched at frequency of between 1 -2 KHz.
  • the frequency of the switching devices of the switching cells of the first type is dependent on the desired converted output power and is typically close to the frequency range of the desired converted output power.
  • the switching cells of the first type comprises switching devices of silicon semiconductor type, preferably one of an i ntegrated gate-commutated thyristor, a gate turn-off thyristor and an i nsulated-gate bipolar transistor. Switchi ng cells constructed with these switching de- vices provide low conduction loss and are accordingly suitable for use in the switching cells of the first type.
  • the switching cells of the first type has 10-20 times the voltage rating of the switch- ing cells of the second type. Accordingly, the switching cells of the first type execute the main portion of the power to be converted .
  • the switching cell of the second type comprises a wideband gap device, preferably one of a silicon carbide switching device, an alumi num nitride switchi ng device, a gallium nitride switching device and a boron nitride switchi ng device.
  • Switching cell constructed with these switchi ng devices, i n particular silicon carbide switching devic- es, provide low switching loss and are accordingly suitable for use in the switching cells of the second type.
  • the switching cells are constructed with at least one of full-bridges, half-bridges and cross connected design .
  • the switching cells of the first type are half-bridge cells and the switching cells of the second type are full-bridge cells.
  • the use of full-bridge cells for the switchi ng cells of the second type is depends on modulation and power balance requirement, and is in particular applicable for HVDC application . It is not necessary use full-bridge cells for the switching cells of the first type unless fault blocking capability is required .
  • the energy stor- age element is one of floating capacitors and batteries. Thereby, it is not necessary to have a separate source or some intermediate conversion level to make a fixed source.
  • the energy stor- age element is supplied by an external energy source.
  • the external energy source is one of a wind , solar and battery energy source.
  • the converter comprises electronic blocks of connected switching cells of the first type and switching cells of the second type.
  • the electronic block is supplied by either separated or floating capacitors sources.
  • the switching devices of the first type have higher voltage blocking capability than the switching devices of the second type. Accordingly, the switchi ng devices of the first type have capacity to convert the larger portion of the power to be converted . The larger portion of the power to be converted depends on the number of cells.
  • the object of the invention is further obtained with a method for controlling a converter accordi ng to claim 12.
  • the method comprises continuously iterating the steps of:
  • the method comprises:
  • the method comprises:
  • the method comprises:
  • Fig. 1a shows an example of a prior art multi-level power converter for three phases.
  • Fig. 1b shows an example of a switching cell for a multi-level power converter.
  • Fig.2 shows a multi-level power converter for three phases according to an embodiment of the invention.
  • Fig.3 shows an example of modulation of the switching cells of the first type and the switching cells of the second type.
  • Fig.4a shows a converter arm of the converter according to a first embodiment of the invention.
  • Fig.4b shows a first example of a switching cell used in the converter arm of fig.4a.
  • Fig.4c shows a second example of a switching cell used in the converter arm of fig.4a.
  • Fig.5a shows a converter arm of the converter according to a second embodiment of the invention.
  • Fig.5b shows an example of electronic blocks used in the converter arm of fig.5a
  • Fig.6 shows a method for controlling a multi-level power converter according to an embodiment of the invention.
  • FIG. 1 shows an example of a prior art multi-level power converter 1 for converting DC electric power to AC electric power for three phases.
  • the converter 1 comprises an arm 3 for each phase.
  • Each arm 3 comprises an upper arm part 5 connected to an i nput termi nal 7 with first potential of the DC power and a lower arm part 10 connected to an i nput terminal 12 with a second potential of the DC power.
  • the upper arm part 5 and the lower arm part 10 are connected to an output terminal 15 of the AC power for the respective phase.
  • the connection to the output terminal 15 comprises a reactor 1 7.
  • Each arm 3 comprises plurality of switching cells 20 connected in serial .
  • I n fig . 1 the upper arm part 5 and the lower arm part 10 each incl udes six switchi ng cells 20.
  • I n the disclosed exam- pie, a capacitor 24 is connected in parallel to the three arms 3.
  • the switchi ng cell 20 comprises a plurality of switchi ng devices 30 and an energy storage element 32.
  • I n fig . 1 b the switching cell 20 is a full-bridge switching cell , which consists of four switching devices 30 and an energy storage element 32 i n form of a capacitor.
  • half-bridge switching cells could be used .
  • the converter 1 further comprises a controller 34 that is config- ured to control the switching of the switchi ng devices 30 in the switchi ng cells 20 so the energy storage elements 32 of the switchi ng cells 20 is discharged or charged , wherein the desired AC power is formed .
  • Fig . 2 shows a multi-level power converter 1 for three phases accordi ng to an embodiment of the invention .
  • the converter 1 in fig . 2 differs from the converter 1 in fig . 1 a in that, each converter arm 3 comprises switchi ng cells of a first type 20a and switchi ng cells of a second type 20b connected in series.
  • the two types of switching cells 20a , 20b differs i n that the switchi ng cells of the first type 20a have lower conduction loss than the switching cells of the second type 20b. Furthermore, the switching cells of the second type 20b have higher switching frequency capability and lower switching loss than the switching cells of the first type 20a .
  • the switching cell of the first type 20a comprises switching devices of silicon semiconductor type.
  • switching devic- es of the switching cell of the first type 20a comprise integrated gate-commutated thyristors.
  • integrated gate- commutated thyristors and insulated-gate bipolar transistors may be used .
  • the switching cell of the second type 20b comprises switching devices of wideband gap type.
  • the switching devices of switchi ng cell of the second type 20b are silicon carbide switchi ng devices.
  • aluminum nitride switching devices, gallium nitride switching devices and boron nitride switch- ing devices may be used .
  • the controller 34 is adapted to control the switching cells 20a, 20b so that a mai n portion of the power conversion is executed by the switching cells of the first type 20a .
  • the main portion of the power conversion constitutes 60-80% of the total power to be converted .
  • the controller 34 is further adapted to control the switching cells 20a, 20b so that a remaining portion of the power to be convert- ed is executed by the switching cells of the second type 20b.
  • the remaining portion of the power to be converted constitutes 40-20% of the total power to be converted .
  • the switching cells of the first type 20a are operated at low fre- quency so that the mai n portion of the power is roughly converted to the desired waveform.
  • the switchi ng cells of the first type 20a form a square wave by means of a small number of modulations steps, such as between four and eight modulations, or more preferably six modulations steps.
  • the main portion of the power to be converted is converted by switchi ng cells with low conduction loss.
  • the switching cells of the first type 20a are switched mainly or excl usively at zero crossings of a si ne wave. Thereby, switching and conduction loss of the mai n portion of the power to be converted is minimized .
  • the switching cells of the second type 20b are operated at high frequency so that the remaining portion of the power shapes the roughly converted power into the desired waveform of the output power. Thereby, the high switching frequency capability and low switchi ng loss of the switching cells of the second type 20b are utilized .
  • the converted power of the switching cells of the first type 20a and the switching cells of the second type 20b are superimposed i nto the output converted power.
  • the preferable property of the low conduction loss of the switching cells of the first type 20a and the preferable properties of high switching frequency capability and low switching loss of the switching cells of the second type 20b are combined in the converter. Accordingly, the combi nation of the two types of switching cells 20a , 20b provides a converter that operates close to the optimal conditions. Furthermore, the converter can be manufactured from commercially available components.
  • Fig . 3 shows an example of modulation of the switching cells of the first type 20a and the switching cells of the second type 20b.
  • the converter is controlled in order to form a sine wave from DC power.
  • the switching cells of the first type 20a are switched at low frequency so that they form a square wave or a quasi square wave from the mai n portion of the power to be converted , see wave form marked A.
  • the switching cells of the second type 20b on the other hand are operated at high frequency in order to convert the remaining portion of the power to be converted , see wave form marked B .
  • the switching cells of the second type 20b are controlled so that when superimposing the converted power of the switching cells of the first type 20a with converted power of the switching cells of the second type 20b, the desired si ne wave will be formed , see wave form marked C. Accordingly, the switchi ng cells of the second type 20b shape the roughly converted power of the switchi ng cells of the first type 20a.
  • Fig . 4a shows a converter arm 3 of the converter 1 according to a first embodiment of the invention .
  • the converter arm 3 comprises four switching cells of the first type 20a and four switching cells of the second type 20b.
  • Each of the upper arm part 5 and the lower arm part 10 comprises two switching cells of the first type 20a and two switching cells of the second type 20b.
  • a reactor 22 is arranged i n each of the upper arm part 5 and the lower arm part 1 0.
  • the two types of switching cells 20a, 20b are both arranged as a half-bridge with a floating capacitor as energy storage element 32 or a battery, as seen i n fig . 4b.
  • the capacitor of the half-bridge is supplied by an external source, such as a battery, a solar or a wind power source, as seen i n fig . 4c.
  • Fig . 5a shows a converter arm of the converter according to a second embodiment of the invention .
  • the converter arm 3 comprises four electronic blocks 40 of connected switching cells of the first type 20a and switching cells of the second type 20b.
  • Each of the upper arm part 5 and the lower arm part 10 comprises two electronic blocks 40.
  • Fig . 5b an example of an electronic block 40 used in the converter arm of fig . 5a is shown .
  • the electronic block 40 comprises both switching cells of the first type 20a and switching cells of the second type 20b.
  • Fig . 6 shows a method for controlling a multi-level power converter 1 according to an embodiment of the invention .
  • the method is initiated in a step 1 10 by receiving information on the present state of the each converter arm 3 and information on the power to be converted .
  • the information on the present state of the converter arm 3 relates to the voltage of the converter arm 3, the voltage of the energy storage device 32 of the switching cells 20a, 20b and the state of the switching devices 30 of the switching cells 20a, 20b.
  • the method comprises, in a step 120, determi ning a new state of the converter arms 3.
  • the new states relates to how and which switching devices 30 of the switching cells 20a, 20b that is to be changed in order to form the desired output from the converter 1 .
  • the new state is determined based on the information received i n step 1 10.
  • the method comprises, in a step 130, transmitting control infor- mation to the switchi ng devices 32 of the switching cells 20a , 20b that need to be changed in order to obtai n the new state of the converter 1 .
  • the control information is transmitted so that the switchi ng cells of the second type 20b are switched at a higher frequency than the switching cells of the first type 20a , wherei n the switchi ng cells of the first type 20a converts a mai n portion of the power conversion and the switching cells of the second type 20b converts the remaining portion of the power conversion .
  • control information is arranged so that the switchi ng cells of the first type 20a form a square wave or a quasi square wave of between four and eight steps of modulation , preferably six steps of modulation .
  • control information is arranged so that the switchi ng cells of the first type 20a are switched mainly or ex- clusively at the zero crossi ngs of a sine wave.
  • both the switching cells of the first type 20a and the switching cells of the second type 20b are half- bridge cells.
  • the switching cells of the first type 20a is not mod- ulated in this method and only clamped the high voltage and generating quasi square wave of between four and eight steps modulation, preferably six steps modulation .
  • the switching cells of the second type 20b are modulated in a way to eliminate the harmonics generated by the clamped high voltage waveform (quasi square wave). ii ) Dou ble modulation using full-bridges
  • the switching cells of the second type 20b need to be full-bridge cells.
  • both the switching cells of the first type 20a and the switching cells of the second type 20b are modulated to achieve a high quality sinusoidal waveform.
  • the switching cells of the first type 20a are modulated with a low frequency to eliminate the low order harmonics mainly 5 th , 7 th , 1 1 th , .. while the switching cells of the second type 20b are modulated with a higher frequency to achieve a sinusoidal waveform.
  • the method comprises, in a step 140, superimposing the converted power from the switching cells of the first type 20a with the converted power from the switching cells of the second type 20b. Thereby, the superimposed converted power corresponds to the desired output power from the converter 1 .
  • the invention is not re- stricted to use of switching cells of the first type 20a and switching cells of the second type 20b for the arm 3.
  • Three or more different types of switching cells 20 may be arranged in the arm 3.
  • the use of two different types of switching cells 20 is preferable.

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

Abstract

L'invention concerne un convertisseur de courant multiniveau (1) comprenant au moins une branche de convertisseur (3) comprenant une pluralité de cellules de commutation connectées en série (20) et un dispositif de commande (34). Chaque cellule de commutation (20) comprend une pluralité de dispositifs de commutation (30) et un élément de stockage d'énergie (32). Les cellules de commutation comprennent au moins des cellules de commutation d'un premier type (20a) et des cellules de commutation d'un second type (20b). Les cellules de commutation du premier type ont une plus faible perte de conduction que les cellules de commutation du second type, et les cellules de commutation du second type ont une plus grande capacité de fréquence de commutation que les cellules de commutation du premier type. Le dispositif de commande commande les cellules de commutation de manière qu'une partie principale de la conversion de courant soit exécutée par les cellules de commutation du premier type et la partie restante de la conversion de courant soit exécutée par les cellules de commutation du second type.
PCT/EP2014/056811 2014-04-04 2014-04-04 Convertisseur de courant multiniveau et procédé de commande d'un convertisseur de courant multiniveau WO2015149866A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
PCT/EP2014/056811 WO2015149866A1 (fr) 2014-04-04 2014-04-04 Convertisseur de courant multiniveau et procédé de commande d'un convertisseur de courant multiniveau

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
PCT/EP2014/056811 WO2015149866A1 (fr) 2014-04-04 2014-04-04 Convertisseur de courant multiniveau et procédé de commande d'un convertisseur de courant multiniveau

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WO2015149866A1 true WO2015149866A1 (fr) 2015-10-08

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN105356747A (zh) * 2015-10-27 2016-02-24 中国电力科学研究院 一种新型柔性直流输电换流器的功率子模块

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6005788A (en) * 1998-02-13 1999-12-21 Wisconsin Alumni Research Foundation Hybrid topology for multilevel power conversion
US6556461B1 (en) * 2001-11-19 2003-04-29 Power Paragon, Inc. Step switched PWM sine generator
EP2256916A1 (fr) * 2008-03-19 2010-12-01 Mitsubishi Electric Corporation Dispositif de conversion de puissance
WO2012119658A1 (fr) 2011-03-10 2012-09-13 Siemens Aktiengesellschaft Onduleur et procédé correspondant pour l'ondulation d'une tension continue
WO2013097906A1 (fr) 2011-12-30 2013-07-04 Abb Technology Ltd Convertisseur de source de tension modulaire
US20140085954A1 (en) * 2011-01-12 2014-03-27 Kabushiki Kaisha Toshiba Semiconductor power conversion device

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6005788A (en) * 1998-02-13 1999-12-21 Wisconsin Alumni Research Foundation Hybrid topology for multilevel power conversion
US6556461B1 (en) * 2001-11-19 2003-04-29 Power Paragon, Inc. Step switched PWM sine generator
EP2256916A1 (fr) * 2008-03-19 2010-12-01 Mitsubishi Electric Corporation Dispositif de conversion de puissance
US20140085954A1 (en) * 2011-01-12 2014-03-27 Kabushiki Kaisha Toshiba Semiconductor power conversion device
WO2012119658A1 (fr) 2011-03-10 2012-09-13 Siemens Aktiengesellschaft Onduleur et procédé correspondant pour l'ondulation d'une tension continue
WO2013097906A1 (fr) 2011-12-30 2013-07-04 Abb Technology Ltd Convertisseur de source de tension modulaire

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN105356747A (zh) * 2015-10-27 2016-02-24 中国电力科学研究院 一种新型柔性直流输电换流器的功率子模块
CN105356747B (zh) * 2015-10-27 2019-07-12 中国电力科学研究院 一种柔性直流输电换流器的功率子模块

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