WO2014086428A1 - Onduleur à plusieurs étages muni d'un module auxiliaire - Google Patents

Onduleur à plusieurs étages muni d'un module auxiliaire Download PDF

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Publication number
WO2014086428A1
WO2014086428A1 PCT/EP2012/074771 EP2012074771W WO2014086428A1 WO 2014086428 A1 WO2014086428 A1 WO 2014086428A1 EP 2012074771 W EP2012074771 W EP 2012074771W WO 2014086428 A1 WO2014086428 A1 WO 2014086428A1
Authority
WO
WIPO (PCT)
Prior art keywords
voltage
additional module
connection
power semiconductor
phase
Prior art date
Application number
PCT/EP2012/074771
Other languages
German (de)
English (en)
Inventor
Herbert Gambach
Hans-Joachim Knaak
Dominik Schuster
Original Assignee
Siemens Aktiengesellschaft
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 Aktiengesellschaft filed Critical Siemens Aktiengesellschaft
Priority to PCT/EP2012/074771 priority Critical patent/WO2014086428A1/fr
Publication of WO2014086428A1 publication Critical patent/WO2014086428A1/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
    • H02M7/49—Combination of the output voltage waveforms of a plurality of converters
    • 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 invention relates to a device for transmitting an electrical power between an AC voltage network and a DC voltage network in the high voltage range with phase modules, each having at least one common DC voltage connection and a separate AC voltage connection, between each DC voltage connection and each AC voltage terminal a Phasenmodulzweig extends, in which a series circuit of two-pole submodules is formed, each having an energy storage and the energy storage parallel power semiconductor circuit, so that depending on the control of the power semiconductor circuit either the voltage drop across the energy storage or zero - Voltage can be generated at the two terminals of each submodule.
  • the invention further relates to a method for controlling such a device.
  • phase module branches can also be referred to as converter arms. They have a series circuit of bipolar submodules, each having an energy storage and a power semiconductor circuit.
  • the power semiconductor circuit consists of two series-connected IGBTs, each with opposite freewheeling diode. Due to the selected circuit, either the voltage dropping across the energy store or else a zero voltage can be generated at the terminals of each submodule.
  • the voltage dropping across the DC terminals of the phase modules can be adjusted stepwise.
  • the distributed over the submodules energy storage must be complex balanced. In this case, it is expedient to generate circulating currents which flow over and between the phase modules. However, such a circulating current always causes a charge change of the energy storage of other submodules.
  • the energy storage of submodules are designed so large that they have sufficient energy for the control of transient
  • WO 2008/039120 A1 describes a high-voltage direct-current transmission system with two converters, which are connected to one another on the DC voltage side.
  • the converters have three phase modules, each with an AC voltage connection, where the AC voltage connections are each connected to one phase of the connected AC mains.
  • each phase module has two DC voltage connections.
  • the device has, in addition to the phase modules, a further module which is equipped with two DC voltage connections and a center connection.
  • the additional module is like the phase modules connected at its two DC voltage terminals in each case with a phase conductor of the three-phase AC voltage line.
  • the third conductor is connected to the middle connection of the module. With the help of this additional connection, the Capacitance of the AC line for high-voltage DC transmission can be better used.
  • the object of the invention is therefore to provide a device and a method of the type mentioned above, which allow a simple balancing of the energy storage and which are also inexpensive.
  • the invention achieves this object on the basis of the aforementioned device by an additional module without AC voltage connection, which has at least one power semiconductor circuit, at least one energy store and at least one DC voltage connection, each DC voltage connection of the additional module being connected to one of the common DC voltage connections of the phase modules and Control means are provided, with which a circular current can be generated, which flows through the additional module and one of the phase modules.
  • the invention achieves this object by virtue of the fact that in a device which has phase modules with at least one common DC voltage connection and in each case a separate AC voltage connection, a voltage is applied between each DC voltage connection and each AC voltage connection
  • Phase module branch extends, in which is formed by a series circuit of two-pole submodules, each having an energy storage and the energy storage parallel-connected power semiconductor circuit, so that depending on the control of the power semiconductor switch either the voltage drop across the energy storage or zero voltage at the two terminals of a each submodule can be generated, wherein an additional module without an AC voltage connection is provided which has at least one power semiconductor circuit, at least one energy store and at least one DC voltage connection, each DC voltage connection of the additional module being connected to one of the common DC voltage connections of the phase modules and no An AC terminal, the power semiconductor circuits of a phase module and the additional module are driven so that a circular current is generated, which flows between and the add-on module and one of the phase modules and on this.
  • the device according to the invention has, in addition to the phase modules whose number corresponds to the number of phases of the connected AC voltage connection, an additional module.
  • the additional module has no AC voltage connection and therefore can not be connected to the AC voltage network connected to the inverter.
  • the additional installation of an additional module seems at first glance to be extra work. However, requirements are conceivable which justify the additional expense of savings elsewhere in the device.
  • the additional module can provide active power supplies which, for example, are used to compensate for transient harmonics for balancing in the case of asymmetrical network errors of the phase affected by an error.
  • the additional module can also serve to balance the DC voltages that are present in the DC voltage network.
  • conventional transformers can be used, which are much cheaper than the DC transformers otherwise used, which generally have to contend with high DC voltage components and are therefore costly.
  • a capacitor is preferably used.
  • the configuration of the additional module is in principle initially arbitrary within the scope of the invention. It is essential that at least one energy store, and a power semiconductor circuit are provided, with which a control of the charge state of the or the energy storage is enabled. In other words, the power semiconductor circuit is connected to the energy storage device (s) such that, depending on the activation of the power semiconductor switch, the energy storage device (s) are charged or discharged.
  • the additional module has a series arrangement of two-pole submodules, which are each equipped with a power semiconductor circuit and with one of these parallel-connected energy storage, so that depending on the control of the power semiconductor circuit, either the voltage dropping to an energy store or a zero voltage can be generated between the two terminals of each submodule.
  • the additional module also has a modular multi-level structure, with two-pole submodules connected in series with one another.
  • each submodule again comprises an energy store and a power semiconductor circuit arranged parallel to the energy store.
  • Add-on modules may be identical to or different from the submodules of the phase modules. It is essential in this exemplary embodiment that in this way a circulating current can be generated between the additional module and one of the phase modules of one of the inverters.
  • the submodules of the add-on module are designed as a half-bridge circuit. Deviating from this, however, it is possible to design the submodules as a full bridge circuit. In addition, it is possible to form the submodules as both half and full bridge modules. In the case of a submodule designed as a half bridge, either a zero voltage or the voltage dropping across the energy store can be generated at the output terminals of each submodule.
  • the half-bridge circuit has only two power semiconductor switches, for example IGBTs, GTOs, IGCTs or the like, which are reverse-conducting or to which in each case a freewheeling diode is connected in parallel in opposite directions.
  • the series circuit of the two power semiconductor switches is connected in parallel to the energy store.
  • a terminal of the submodule is connected to a pole of the energy storage. The other terminal is connected to the potential point between the power semiconductor switches.
  • the full bridge circuits have a total of four power semiconductor switches, wherein two series circuits each consisting of two power semiconductor switches are each connected in parallel to the energy store. One connection terminal is connected to the potential point between the power semiconductor switches of the first series circuit and the second connection terminal is connected to the potential point between the two power semiconductor switches of the second connection terminal.
  • a possible with the use of Vollmaschinensubmodulen negative voltage to the additional module can be used to extinguish arcs, which arise for example on a line of the DC network.
  • the submodules moreover have at least one ohmic resistance, with which the electrical power is erroneous. can be reversibly converted into heat and released into the atmosphere.
  • the additional module has at least one throttle.
  • the throttle serves, for example, to connect a series circuit of submodules to one pole of the DC voltage network.
  • two throttles are provided, which are arranged between the series connection of submodules and each pole of the DC voltage circuit.
  • the additional module can have a center connection.
  • the center connection can serve, for example, for earthing the entire system and for balancing the voltages in the DC intermediate circuit.
  • the number of submodules of the additional module corresponds to the number of submodules of a phase module branch of a phase module.
  • the add-on module can only have half as many submodules as one
  • FIG. 1 shows an equivalent circuit diagram of a previously known modular multistage converter
  • FIG. 2 shows a submodule designed as a half bridge for a multi-stage converter according to FIG. 1,
  • Figure 3 is designed as a full bridge submodule
  • Figure 4 is an equivalent circuit diagram of a first embodiment of the device according to the invention.
  • Figure 5 show a further embodiment of the device according to the invention.
  • FIG. 1 shows a converter 1 according to the prior art. It can be seen that the converter has three phase modules 2, 3 and 4 which are each connected to a first common DC voltage connection 7 and a second common DC voltage connection 8. Furthermore, each phase module 2, 3, 4 has a separate AC voltage connection 7, which serves to connect one of the phases 6 of an otherwise not further clarified AC voltage network.
  • the first common DC voltage connection 7 is connected to the positive pole and the second common DC voltage connection 8 to the negative pole of a DC voltage network.
  • the inverter 1 is used to convert AC voltage to DC voltage or vice versa, depending on the direction of the power flow.
  • the phase modules 2, 3 and 4 each have two phase module branches 9 to 14, which each extend between the respective AC voltage connection 5 and one of the DC voltage connections 7 or 8. In this case, each phase module branch 9 to 14 consists of a series connection of two-pole submodules 15 whose equivalent circuit diagrams are shown by way of example in FIGS. 2 and 3.
  • FIG. 2 shows a submodule 15 embodied as a half-bridge circuit. It can be seen that this submodule 15 has an energy store 16 and a power semiconductor circuit 17, which is implemented in FIG. 2 as a series circuit 22 which consists of two power semiconductor switches 18, each of which has a freewheeling diode 19 is connected in parallel in opposite directions.
  • the power semiconductor switches 18 are power semiconductor switches which can be switched on and off such as IGBTs, GCTs or the like.
  • the submodule 15 according to FIG. 2 has a first connection terminal 20, which is connected to the potential point between the power semiconductor switches 18, and via a second connection terminal 21, which is connected to a pole of the energy accumulator 16. Depending on the control of the power semiconductor switch 18, either the voltage dropping across the energy store Uc or the voltage zero can thus be generated at the connection terminals 20 and 21.
  • FIG. 3 shows a submodule 15, which is referred to as a so-called full bridge circuit.
  • the full-bridge circuit also has energy stores 16 and a power semiconductor circuit 17 connected in parallel therewith, which has a first series circuit 22 and a second series circuit 23, each consisting of two power semiconductor switches 18 which can be switched on and off.
  • the first series circuit 22 and the second series circuit 23 are both connected in parallel to the energy store 16.
  • the first connection terminal 20 of the submodule 15 is connected to the potential point between the power semiconductor switches 18 of the first series circuit 22 and the second submodule connection terminal 21 is connected to the potential point between the power semiconductor switches 18 of the second series circuit 23.
  • both the energy storage voltage Uc dropping across the energy store 16 in this case a capacitor, a zero voltage or else the inverse energy storage voltage Uc can be generated at the connection terminals 20 and 21 of the submodule 15 according to FIG.
  • inverter 1 the submodules 15 are all formed as a half-bridge circuit.
  • inverter known which form only submodules in full bridge circuit according to Figure 3.
  • inverters 1 have been proposed which are both
  • phase module branches 9 to 14 can have both alternating voltage components Iac flowing, for example, from a phase 6 of the alternating voltage network, to both sides via the phase module branches of a common phase module.
  • DC components Idc are also recognizable which flow, for example, from the negative DC voltage connection of the phase module 2 via the phase module branches 10 and 9 to the positive DC voltage connection.
  • circular currents Ici are also possible, which arise, for example, when voltage differences occur between the phase module voltages generated by the phase modules 3 and 4.
  • the circulating currents Ici flow between the phase modules 3 and 4 and via the phase modules 3 and 4.
  • FIG. 4 shows an exemplary embodiment 24 of the device 24 according to the invention, which has an inverter 1 according to FIG. 1 and an additional module 25.
  • the additional module 25 has two DC voltage terminals 26 and 27, which are connected to the common DC voltage terminals 7 and 8 of the phase modules 2, 3 and 4.
  • the additional module 25 also has a series connection of submodules 15, which are all designed either as a half-bridge circuit according to FIG. 2 or all as a full-bridge circuit according to FIG.
  • an inductance in the shape of a choke, coil or the like is arranged between the series connection of the submodules 15 and each of the DC voltage terminals 26 and 27 of the additional module 25.
  • FIG. 5 shows a further exemplary embodiment of the device 24 according to the invention, the additional module 25 of which has a A first additional module branch 28 and between the middle branch 30 and the DC voltage connection 27 a second additional module branch 29 extend between the middle connection 30 and the DC voltage connection 26.
  • Each of the additional module branches 28, 29 in turn consists of a series connection of submodules 15 according to FIG. 2 and / or FIG. 3.
  • the middle connection 30 is connected, for example, to the ground potential.
  • an asymmetric load of the connected AC voltage network can be compensated.
  • the power stored in the energy stores of the additional module 25 it is possible for the power stored in the energy stores of the additional module 25 to be made available for the converter 1 at short notice in the event of need.
  • the energy storage 16 of the phase modules 2, 3, 4 of the inverter 1 can thus be made smaller and therefore less expensive.
  • the additional module 25 can be arranged in the immediate vicinity of the converter 1. In the context of the invention, however, a greater distance between the additional module 25 and inverter 1 is possible.
  • DC voltage networks to connect with each other.
  • an additional module can also be shared by several inverters.

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

Abstract

L'invention vise à pouvoir mettre en circuit un dispositif (24) destiné à transmettre une puissance électrique entre un réseau à tension alternative et un réseau à tension continue dans le domaine des hautes tensions, qui comprend des modules de phase (2, 3, 4) présentant chacun au moins une connexion de tension continue commune (7, 8) ainsi qu'une connexion de tension alternative séparée (5), et dans lequel, entre chaque connexion de tension continue (7, 8) et chaque connexion de tension alternative (5), s'étend une branche de module de phase (9,...14), qui comprend un circuit série composé de sous-modules bipolaires (15) qui présentent chacun un accumulateur d'énergie (16) et un circuit à semi-conducteurs de puissance connecté en parallèle avec l'accumulateur d'énergie, de telle sorte que, selon le pilotage du circuit à semi-conducteurs de puissance (17), il est possible d'obtenir soit la tension décroissante dans l'accumulateur d'énergie (16), soit une tension nulle sur les deux bornes de connexion (20, 21) de chaque sous-module (15), le dispositif devant permettre d'obtenir de façon simple une symétrisation des accumulateurs d'énergie et devant en outre être économique. Pour cela, il est proposé de créer un module auxiliaire (24) sans connexion de tension alternative, qui présente au moins un circuit à semi-conducteurs de puissance (17), au moins un accumulateur d'énergie (16) et au moins une connexion de tension continue (26, 27), chaque connexion de tension continue (26, 27) du module auxiliaire (25) étant reliée à l'une des connexions de tension continue communes (7, 8) des modules de phase (2, 3, 4), et l'onduleur comportant des moyens de commande avec lesquels il est possible de produire un courant de circuit qui passe par le module auxiliaire (25) et l'un des modules de phase (2, 3, 4).
PCT/EP2012/074771 2012-12-07 2012-12-07 Onduleur à plusieurs étages muni d'un module auxiliaire WO2014086428A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
PCT/EP2012/074771 WO2014086428A1 (fr) 2012-12-07 2012-12-07 Onduleur à plusieurs étages muni d'un module auxiliaire

Applications Claiming Priority (1)

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PCT/EP2012/074771 WO2014086428A1 (fr) 2012-12-07 2012-12-07 Onduleur à plusieurs étages muni d'un module auxiliaire

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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP3352359B1 (fr) * 2015-09-17 2020-09-16 Mitsubishi Electric Corporation Dispositif de conversion de puissance
EP4329181A1 (fr) * 2022-08-22 2024-02-28 Siemens Aktiengesellschaft Actionneur de frein modulaire à structure hybride

Citations (6)

* 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
WO2007023061A2 (fr) * 2005-08-26 2007-03-01 Siemens Aktiengesellschaft Resistance a impulsions (résistance de freinage) pour un convertisseur dans les plages supérieures de tension et de puissance
WO2007028349A1 (fr) * 2005-09-09 2007-03-15 Siemens Aktiengesellschaft Dispositif de transmission d'energie electrique
WO2008039120A1 (fr) 2006-09-29 2008-04-03 Abb Technology Ltd. Conversion de lignes ca en lignes ccht
WO2008125493A1 (fr) * 2007-04-16 2008-10-23 Siemens Aktiengesellschaft Filtre actif ayant une topologie multi-niveaux
EP2088668A2 (fr) * 2008-02-06 2009-08-12 Siemens Aktiengesellschaft Convertisseur statique

Patent Citations (6)

* 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
WO2007023061A2 (fr) * 2005-08-26 2007-03-01 Siemens Aktiengesellschaft Resistance a impulsions (résistance de freinage) pour un convertisseur dans les plages supérieures de tension et de puissance
WO2007028349A1 (fr) * 2005-09-09 2007-03-15 Siemens Aktiengesellschaft Dispositif de transmission d'energie electrique
WO2008039120A1 (fr) 2006-09-29 2008-04-03 Abb Technology Ltd. Conversion de lignes ca en lignes ccht
WO2008125493A1 (fr) * 2007-04-16 2008-10-23 Siemens Aktiengesellschaft Filtre actif ayant une topologie multi-niveaux
EP2088668A2 (fr) * 2008-02-06 2009-08-12 Siemens Aktiengesellschaft Convertisseur statique

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
MOHAMMADI PIROUZ H ET AL: "Extended modular multilevel converters suitable for medium-voltage and large-current STATCOM applications", IPEC, 2010 CONFERENCE PROCEEDINGS, IEEE, PISCATAWAY, NJ, USA, 27 October 2010 (2010-10-27), pages 487 - 492, XP031856743, ISBN: 978-1-4244-7399-1 *

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP3352359B1 (fr) * 2015-09-17 2020-09-16 Mitsubishi Electric Corporation Dispositif de conversion de puissance
EP4329181A1 (fr) * 2022-08-22 2024-02-28 Siemens Aktiengesellschaft Actionneur de frein modulaire à structure hybride
WO2024041786A1 (fr) * 2022-08-22 2024-02-29 Siemens Aktiengesellschaft Actionneur de frein modulaire à conception hybride

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