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WO2016050532A1 - Convertisseur modulaire multi-niveaux à condensateur central sur le circuit intermédiaire - Google Patents

Convertisseur modulaire multi-niveaux à condensateur central sur le circuit intermédiaire Download PDF

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Publication number
WO2016050532A1
WO2016050532A1 PCT/EP2015/071430 EP2015071430W WO2016050532A1 WO 2016050532 A1 WO2016050532 A1 WO 2016050532A1 EP 2015071430 W EP2015071430 W EP 2015071430W WO 2016050532 A1 WO2016050532 A1 WO 2016050532A1
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WO
WIPO (PCT)
Prior art keywords
converter
voltage
series
circuit
level
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/EP2015/071430
Other languages
German (de)
English (en)
Inventor
Gopal Mondal
Matthias Neumeister
Sebastian Nielebock
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.)
Siemens AG
Siemens Corp
Original Assignee
Siemens AG
Siemens 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 Siemens AG, Siemens Corp filed Critical Siemens AG
Publication of WO2016050532A1 publication Critical patent/WO2016050532A1/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
    • 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
    • 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

Definitions

  • the present invention relates to a method for converting electrical energy by means of a Mehrpegelenergywand ⁇ lers, in which at an AC voltage terminal an elec ⁇ tric AC voltage and at a dc connected to a DC voltage DC voltage connection, a DC electrical voltage is provided, wherein the electrical energy by means of at least one is connected to the DC ⁇ voltage connection of the multi-level energy converter ⁇ nen converter circuit is converted, for which purpose the converter circuit a plurality of series connected
  • Converter units comprising a converter unit capacitor and provides a center connection coupled to the AC voltage terminal, wherein the converter circuit is controlled by means of a control unit to convert the electrical energy.
  • the invention further relates to a multi-level energy converter for converting supplied electrical energy, with an AC terminal and a DC terminal for supplying and discharging the electrical energy and with a control unit, wherein the multi-level energy converter has a first converter circuit which is connected to the DC voltage terminal of the multi-level energy converter and the plurality connected in series
  • Converter units comprising a converter unit capacitor and which provides a center terminal coupled to the AC terminal, wherein the converter circuit is connected to a control unit for controlling to convert the electrical energy.
  • Multi-level energy converters and methods for their operation are basically known, so there is no need for a separate pressure ⁇ written proof for this.
  • Such energy converters are frequently used in the field of high-voltage direct current (HVDC) transmission, with DC clamping being used. in the range of several 100 kV and in the range of 1 GW.
  • HVDC high-voltage direct current
  • multi-level energy converters are used bidirectionally, so that so ⁇ well electrical energy from the AC voltage side to the DC voltage side and vice versa can be converted.
  • the conversion is performed without any substantial alteration of the ⁇ n ⁇ voltage level, that is, that the level of a maximum amplitude of the AC voltage is substantially equal to a level of the DC voltage intermediate circuit.
  • the multi-level energy converter Due to the circuit structure, the control of the converter units is comparatively reliable compared to alternative circuit concepts, which is why the multi-level energy converter is particularly suitable for applications in the HVDC sector.
  • the multi-level energy converter with the generic design does not require a DC link capacitor at the DC link, which otherwise would be very complicated and expensive when used in the HVDC sector.
  • the converter capacitors By the converter capacitors a corresponding support of the DC voltage intermediate circuit is achieved.
  • the converter capacitors are sorted ⁇ but equipped with a certain minimum capacity leading to an overall relatively large design of the multilevel converter.
  • Generic multi-level energy converters are called in the English literature also Modular Multi Level Converter or MMC or M2C.
  • Multi-level energy converters of the generic type have proven themselves in the use of the aforementioned type in power engineering. Basically, can such multi-level power converter ⁇ course also be used at lower voltages. In this case, the advantage of very high efficiency, low switching losses and high reliability compared to other energy converters can be used.
  • each of the converter ⁇ units of the multi-level energy converter has a comparatively large converter unit capacitor.
  • the converter It is therefore important to choose a high capacitance capacitor because it has to store almost the energy of a half-wave of the fundamental AC voltage. This makes the converter unit capacitor large and expensive. In high-voltage applications, this aspect is not significant in that, in high-voltage applications, a very expensive high-voltage capacitor in the DC link can basically be saved.
  • the invention has the object of developing a multi-level ⁇ energy converter and a method for its operation to the effect that his effort in particular for
  • the invention particularly proposes that the converter units be controlled in such a way that a current circulates through the converter units.
  • control unit is directed a ⁇ to allow a current through the converter units circulates lose.
  • the invention utilizes the knowledge to a process for Steue ⁇ tion of a multi-level power converter and a multilevel ⁇ energy converter further develop using a circulating current is provided by means of which the respective electrical
  • the invention is based on the realization that in generic Mehrpegel energie ⁇ converters the converter unit capacitors depending on the control by the control unit must withstand high voltages and a large current ripple. In order to be able to comply with these conditions, large film capacitors are used in the prior art. With the invention, it is now possible to significantly reduce the capacity of the converter unit capacitors. As a result, both the size and costs for the multi-level energy converter can be significantly reduced.
  • the multi-level energy converter can thereby also become attractive for low-voltage applications.
  • the invention uses the generation of a circulation current through all converter unit capacitors and a DC voltage intermediate circuit capacitor or a supplementary circulation capacitor, which is connected in parallel to the converter circuit.
  • the circulation capacitor is preferably to be adapted in terms of capacity to the control method according to the invention adapted to choose. It proves to be advantageous that - in contrast to Hochwoodsanwendun ⁇ conditions - the use of capacitors on the DC link basically can be made relatively straightforward.
  • the cost of the circulation capacitor which is required in addition to a corresponding adjustment of the control in addition to the invention, is outweighed by the potential savings on the converter unit capacitors. Overall, this results in a reduction in the effort for the multi-level energy converter.
  • DC intermediate circuit can also be provided that the circulation current circulates at least partially through the parallel ⁇ switched converter circuits. A capacitor can then be saved.
  • low-voltage means in particular a definition according to Directive 2006/95 / EC of the European Parliament and of the Council of 12 December 2006 on the approximation of the laws of the Member States relating to electrical equipment designed for use within certain voltage limits.
  • the invention is not limited to this voltage range, but can also be used in the range of the medium voltage, which may preferably include a voltage range greater than 1 kV up to and including 52 kV.
  • the method according to the invention or the multi-level energy converter according to the invention it is possible to convey electrical energy from the AC voltage connection to the DC voltage connection or vice versa.
  • the multi ⁇ level energy converter makes a corresponding conversion. For this purpose, at the DC voltage intermediate circuit of the
  • Multi-level energy converter connected to the converter circuit with a Rei ⁇ henscrien, which series circuit comprises a plurality of series-connected converter units.
  • a Rei ⁇ henscrien which series circuit comprises a plurality of series-connected converter units.
  • two or three or more such converter circuits may also be connected to the DC intermediate circuit.
  • connection or connection connection provides the change ⁇ pannungsancript.
  • Converter circuits connected to the intermediate circuit there is also the possibility that the converter circuits are connected in parallel at least partially with respect to the Gleichthesesanschlus ⁇ ses and the AC voltage terminal .
  • Each of the converter units itself has in each case a series ⁇ circuit of two switching elements, to which the
  • Converter unit capacitor is connected in parallel.
  • the switching elements By means of the switching elements, the converter unit capacitor in be predeterminably included in the conversion process.
  • the switching elements are connected to a control unit which controls the switching elements in a suitable manner.
  • the basic control method with respect to the wall of one energy by means of a multi-level power converter is the professional basically known, so that the present case is ver ⁇ dispensed to a de ⁇ waisted representation of the conversion process.
  • a switching element for the purposes of this disclosure is preferably a controllable electronic switch element, Example ⁇ , a controllable electronic semiconductor switch, such as a transistor, a thyristor, combination scarf ⁇ obligations thereof, preferably (with parallel-connected freewheeling diodes, a gate turn-off thyristor GTO ), an isolated gate bipolar transistor (IGBT), combinations thereof, or the like.
  • the semiconductor switch may also be formed by a metal oxide semiconductor field effect transistor (MOSFET).
  • MOSFET metal oxide semiconductor field effect transistor
  • the switching element is controllable by the control unit.
  • the control unit preferably determines the conditions which cause the activation or deactivation of the entspre ⁇ sponding part of the transducer units.
  • the control unit with sensors relevant parameters, such as the switching elements of the converter unit ⁇ capacitors of the converter circuit and / or the like can detect.
  • Parameters may be, for example, an electrical current, an electrical voltage, an electrical power, a phase shift between an electrical voltage and an associated electrical current, combinations thereof, or the like.
  • the converter unit capacitor may be formed by a film capacitor, a ceramic capacitor, but also by an electrolytic capacitor suitable for frequency applications or the like.
  • the converter unit capacitor may also be formed by a combination of a plurality of individual capacitors, in particular of different types as mentioned above.
  • An embodiment of the invention provides that the converter units have the switching structure of a half-bridge with regard to the switching elements.
  • the transducer unit is the reason ready means of which the rows ⁇ circuit of the converter units can be realized by two terminals. One of the connections is through the connection port of the
  • the control unit controls the switching elements according to the dung OF INVENTION ⁇ so that a current through the
  • Converter unit capacitors of the converter units and possibly circulating the circulating capacitor circulates.
  • the circulating current is selected such that an electrical voltage is maintained at the converter unit capacitors.
  • this can be achieved by flowing the circulating current through a central capacitor such as a DC link capacitor, a supplemental circulating capacitor or the like.
  • This is a particularly effective operation can be achieved, can be selected to be particularly small in the Kapazitä ⁇ th of the transducer unit capacitors.
  • a further embodiment of the invention provides that the circulating current is chosen such that a voltage Change is minimal to the converter unit capacitors.
  • This embodiment makes it possible to minimize the influence of the circulating current on the intended conversion of the multi-level ⁇ energy converter. It can be achieved that a ripple voltage to the converter unit ⁇ capacitors and / or a capacitance value of the converter unit capacitors are reduced. The latter makes it possible to reduce dimensions of weight and / or the like of the converter unit capacitors.
  • a further embodiment of the invention proposes that a period for the circulating current is determined as a function of an electrical energy acting on the converter unit capacitors.
  • This control function can be achieved in a simple manner, which allows to achieve the best possible interpretation of Wandlerein ⁇ integrated capacitors.
  • the period can be determined, for example, by first determining an average energy of the converter capacitors. For this purpose it can be provided that the sum of the energies of all converter unit capacitors is determined and related to their number. For example, it can be provided that the sum of the energies of all converter unit capacitors is divided by the number of converter unit capacitors. In an embodiment, it can be provided that the average energy for one or all converter scarf ⁇ tions is determined separately. In an alternative Substituted ⁇ staltung may further be provided that the average energy for all conversion circuits is determined in common. According to a deviation of a current energy of a
  • Converter unit capacitor with respect to the average energy is added to this converter unit capacitor according to energy or discharged. This is preferably carried out separately for all converter unit capacitors of a respective converter circuit or jointly for all converter circuits.
  • the circulating current is determined such that a total of Ener ⁇ gie shortungen the transducer unit capacitors is minimized is proposed.
  • This embodiment particularly takes into account the case where the converter unit capacitors of the converter units are not uniformly stressed during the walling. It allows this configuration to find a optima ⁇ le design that is optimized for the overall arrangement of the multi-level power converter and the operation of the wall one.
  • each converter unit has two parallel series ⁇ circuits with two switching elements. This makes it possible to form the circuit structure of a full bridge with respect to each converter unit.
  • Conversion unit ports are provided through the respective mid Elan ⁇ connections of the two series circuits of the switching elements.
  • the flexibility with respect to the control of the multi-level energy converter can be improved, and at the same time fault currents can be reduced, which can occur when a short-circuit occurs on the DC side.
  • the DC voltage at the DC voltage intermediate circuit of any polarity can be, making the Flexi ⁇ stability is further increased.
  • an increased effort with respect to the control is required because a correspondingly larger number of switching elements is to be controlled.
  • Semiconductor switches as switching elements are operated in accordance with this disclosure in the switching mode.
  • the switching operation of a semiconductor switch means that in an on scarf ⁇ ended state between the switching path forming arrival circuits of the semiconductor switch is a very low electrical resistance is provided, so that a high current flow is possible with very small residual stress.
  • the switching path of the semiconductor scarf ⁇ ters high impedance, that is, it provides a high elek- fresh resistance, so even at high, at the
  • Switching path applied electrical voltage substantially no or only a very small, especially negligible current flow is present. This differs from a linear operation, which is not used in multi-level energy converters of the generic type.
  • a development of the invention provides that a connection inductance is connected between the connection of the series circuit inductances and the AC voltage connection.
  • This intermediary Terminal inductance he ⁇ laubt to adapt the multi-level power converter AC side better.
  • a plurality of series connected conversion units and a respective other AC voltage connection be ⁇ riding alternate end of the series circuit are connected in two series-connected series circuit inductors each comprising on the DC voltage intermediate circuit of the multi ⁇ level energy converter two further series circuits, wherein the control unit is adapted entspre ⁇ accordingly to control the switching elements of a three-phase alternating voltage network.
  • the chosen structure may also by a comparatively slight extra effort on the part of controlling a simp ⁇ che adjustment for a three-phase alternating current network ER enough.
  • the AC voltages of the three-phase alternating voltage network are basically the same, but only shifted by 120 °.
  • the circulating current circulates only by one of the three series connections.
  • the controller can control the switching elements ent ⁇ accordingly. It can be provided that the circulating current is cyclically switched from one of the three series circuits to another. In addition, it can also be provided that the circulating current flows at least simultaneously through the three series circuits.
  • the invention thus uses a combination of the zircon ⁇ culation capacitor with the appropriate control of
  • FIG. 1 shows a schematic block diagram for a multi- ⁇ gelenergywandler according to the invention
  • FIG 2 is a schematic circuit diagram for a first extended ⁇ staltung a transducer unit for the multi-level ⁇ energy converter of FIG 1,
  • FIG. 3 shows a schematic circuit diagram representation for a second embodiment of a converter unit for the multi-level energy converter according to FIG. 1, 4 shows schematically a diagram in which by means of two
  • FIG. 3 is a graph schematically illustrating a diagram representing an intermediate circuit voltage of the multi-level energy converter according to the invention, and is a schematic diagram showing an electric voltage across a power supply
  • Converter unit capacitor of the multi-level energy converter according to the invention a representation like FIG 4, but without the circu lierenden current according to the invention, a representation like FIG 5, but without the zirku lierenden current according to the invention, a representation like FIG 6, but without the zirku lierenden Current according to the invention, a representation as in FIG 4, with the circulating current according to the invention, however, without circulation capacitor,
  • FIG 11 with the circulating current according to the invention, however, without circulating capacitor, and a representation as in FIG 6, with the circulating current according to the invention, however, without circulation capacitor.
  • the multi-level energy converter 10 comprises three AC terminals 12, 14, 16, and a DC terminal 20 for supplying and Abon ⁇ ren of electrical energy and a control unit.
  • the control unit is not shown in the figure.
  • the multi-level energy converter 10 is controlled such that the three AC voltage terminals 12, 14, 16 are operated in a three-phase operation in which the AC voltages at the three AC voltage terminals 12, 14, 16 are temporally offset by 120 °.
  • the multi-level energy converter 10 further comprises a DC voltage intermediate circuit 18, to which the DC voltage terminal 20 is connected.
  • a DC voltage intermediate circuit 18 In addition to the DC voltage intermediate circuit 18 three converter circuits in
  • Each of the three series circuits 22, 24, 28 comprises a plurality of converter units 28 connected in series.
  • the multi-level energy converter 10 according to the invention is therefore modularly formed from converter units 28.
  • the series circuits 22, 24, 28 have an even number of converter units 28.
  • a further series connection of two series-connected inductances 30 (L arm ) connected in series is connected in the series circuit 22, 24, 28.
  • the series connection inductances 30 form a connection point, which respectively provides the AC voltage connections 12, 14, 16.
  • the converter unit 28 comprises a series connection of two switching elements, which is formed in the present case by IGBTs 34, 36.
  • a converter unit capacitor 38 is connected in parallel.
  • the wall 28 provides ⁇ lerritt conversion unit ports 50, 52 ready which allow the converter unit 28 to be connected in a predetermined manner in the respective series circuit 20, 22, 24 in the multi-level energy converter 10.
  • the converter unit 28 thus provides the circuit structure of a half-bridge.
  • FIG 3 shows an alternative embodiment for a transducer ⁇ unit 32, which can be used alternatively for the converter unit 28 in the electrical circuit of FIG 1.
  • the transducer unit 32 according to FIG 3 comprises two parallel only ⁇ switched series circuits each with two switching elements, here also IGBTs 34, 36, 44, 46. These series scarf ⁇ obligations connected in parallel again, a transducer unit ⁇ capacitor 38.
  • Central terminals of the series circuits STEL len terminals 54 , 56 of the converter unit 32 by means of which they, like the converter unit 28 with the terminals 50, 52, can be connected in the electrical circuit of the multi-level energy converter 10.
  • the multi-level energy converter 10 uses only one type of converter units, namely either the converter unit 28 or the converter unit 32.
  • a circulation capacitor 42 is connected to the DC voltage intermediate circuit 18. Furthermore, it is shown in FIG. 1 that a current circulates through the first series circuit 22 and the circulation capacitor 42. This serves the wall ⁇ lerappelskondensatoren 38 of the converting units 28 to beat acted upon in order to control the voltage and to reduce current ripple on the converter unit capacitors 38th As a result, the effort with respect to the individual converter units 28, 32 can be reduced, so that the expense for the multi-level ⁇ energy converter 10 can be reduced overall. This makes its application attractive even at low voltage. In addition, the circulation capacitor 42 causes that in the three-phase operation of the multi-level energy lers 10 this AC side can be controlled easily and independently of interphase conditions.
  • the circulating current 40 between the converter unit capacitors 38 and the circulation capacitor 32 is required. It is advantageous to find a suitable value for the circulating current 40 to avoid any adverse effects.
  • a voltage deviation across the converter unit capacitor 38 may be represented as follows:
  • the voltage deviation as previously determined, can be positive or negative, depending on the current state of charge of the battery
  • Converter unity capacitor 38 The sign of the deviation determines whether the converter unit capacitor 38 must be charged or discharged.
  • the converter unit capacitor 38 may be charged or discharged by an impressed current i adjust .
  • the current flows through the converter unit capacitor 38 to minimize the aforementioned voltage deviation.
  • the current generates a voltage change across the converter unit capacitor 38, which is given by:
  • the time T denotes a time during which the circulating ⁇ de current 40 i adjust flows.
  • the energy of the converter unit capacitor 38 with respect to the voltage deviation Av err x is defined by
  • the current i acij ust should minimize the optimization function.
  • the multiplication by the value 2 is required because two series circuit inductances 30 per series circuit 22, 24, 26 (FIG. 1) are provided. Therefore, to generate a current 40i adjust, a voltage drop across the series-connected inductor 30 is low
  • FIGS. 4 to 6 schematically show diagrams in which the multi-level energy converter 10 according to the invention has the circulating current 40 and the circulation capacitor 42.
  • the graph 64 shows an electrical voltage at one of the AC voltage terminals 12, 14, 16 and the current flowing at this terminal by means of a graph 66.
  • the ordinate indicates the corresponding values in volts (V) and in amps (A).
  • the abscissa shows the time in seconds.
  • FIG. 5 shows an associated representation of the intermediate circuit voltage on the DC voltage intermediate circuit 18 with a graph 58. It can be seen that the intermediate circuit voltage at the DC bus voltage
  • DC voltage intermediate circuit 18 is substantially constant at about 700 V.
  • the alternating voltage and the alternating current are essentially undisturbed, as can be recognized from the graphs 64, 66 according to FIG.
  • FIG. 6 shows, by way of example for one of the converter unit capacitors 38, a corresponding voltage curve on the basis of the graph 60.
  • FIGS. 7 to 9 show a comparable representation to FIGS. 4 to 6, but in this simulation no circulating current 40 is provided. It can be seen from FIG. 7 that, although the alternating voltage according to the graph 64 is still substantially undisturbed, interference with the graph 66 with respect to the current results. Accordingly, in the intermediate circuit voltage at the DC voltage intermediate circuit 18, a corresponding increase can be seen with reference to the graph 58.
  • FIG. 9 also shows a corresponding voltage development on the basis of the graph 60 for the electrical voltages applied to the converter unit capacitors 60.
  • FIG 10 to 12 show corresponding to Figure 4 to 6 Dia ⁇ programs.
  • a circulating compensation current 40 is provided in the simulation according to FIGS. 10 to 12, but the circulation capacitor 42 is missing.
  • FIG graph 64 is substantially undisturbed, however, the current waveform ge ⁇ Wegss the graph 66 significant disturbance on. Accordingly, a voltage rise at constant tension ⁇ voltage intermediate circuit 80 according to the graph 58 to ver ⁇ is also drawing shown in FIG. 11
  • a DC voltage of 700 V and an AC voltage of 400 V effectively between the phases at the AC voltage terminals 12, 14, 16 shown in FIG 1 at 50 Hz.

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

Abstract

L'invention concerne un convertisseur d'énergie multi-niveaux (10) servant à convertir une énergie électrique d'entrée, comprenant une borne de tension alternative (12) ainsi qu'une borne de tension continue (20) permettant l'entrée et la sortie de l'énergie électrique ainsi qu'une unité de commande, le convertisseur d'énergie multi-niveaux (10) comprenant un premier circuit convertisseur, qui est raccordé à la borne de tension continue (20) du convertisseur d'énergie multi-niveaux (10) et qui comporte plusieurs unités de conversion (28, 32) montées en série présentant un condensateur (38) d'unité de conversion et qui présente une borne centrale connectée à la borne de tension alternative (12), le circuit convertisseur, pour être commandé, étant raccordé à une unité de commande, afin de convertir l'énergie électrique. Selon l'invention, l'unité de commande est conçue pour faire circuler un courant (40) à travers les unités de conversion (28, 32).
PCT/EP2015/071430 2014-09-30 2015-09-18 Convertisseur modulaire multi-niveaux à condensateur central sur le circuit intermédiaire Ceased WO2016050532A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102014219789.9 2014-09-30
DE102014219789.9A DE102014219789A1 (de) 2014-09-30 2014-09-30 Modularer Multilevelumrichter mit zentralem Kondensator am Zwischenkreis

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WO2016050532A1 true WO2016050532A1 (fr) 2016-04-07

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EP4513698A1 (fr) 2023-08-22 2025-02-26 Siemens Aktiengesellschaft Formation de cellules de batterie rechargeables au moyen d'une source d'énergie

Citations (3)

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Publication number Priority date Publication date Assignee Title
WO2012055435A1 (fr) * 2010-10-27 2012-05-03 Alstom Grid Uk Limited Convertisseur modulaire à niveaux multiples
EP2485384A1 (fr) * 2009-09-30 2012-08-08 Tokyo Institute of Technology Procédé de démarrage de moteur
WO2014046555A1 (fr) * 2012-09-21 2014-03-27 Auckland Uniservices Limited Améliorations dans ou concernant des convertisseurs multi-niveau modulaires

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Publication number Priority date Publication date Assignee Title
US8447275B2 (en) * 2010-12-03 2013-05-21 Microchip Technology Incorporated Lossless inductor current sensing in a switch-mode power supply
KR101410731B1 (ko) * 2013-02-13 2014-06-24 한국전기연구원 고압직류송전용 모듈형 멀티레벨 컨버터의 순환전류 억제 방법

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2485384A1 (fr) * 2009-09-30 2012-08-08 Tokyo Institute of Technology Procédé de démarrage de moteur
WO2012055435A1 (fr) * 2010-10-27 2012-05-03 Alstom Grid Uk Limited Convertisseur modulaire à niveaux multiples
WO2014046555A1 (fr) * 2012-09-21 2014-03-27 Auckland Uniservices Limited Améliorations dans ou concernant des convertisseurs multi-niveau modulaires

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