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WO2018113926A1 - Convertisseur - Google Patents

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Publication number
WO2018113926A1
WO2018113926A1 PCT/EP2016/081950 EP2016081950W WO2018113926A1 WO 2018113926 A1 WO2018113926 A1 WO 2018113926A1 EP 2016081950 W EP2016081950 W EP 2016081950W WO 2018113926 A1 WO2018113926 A1 WO 2018113926A1
Authority
WO
WIPO (PCT)
Prior art keywords
module
modules
power converter
voltage
surge arrester
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/EP2016/081950
Other languages
German (de)
English (en)
Inventor
Daniel BÖHME
Ingo Euler
Thomas KÜBEL
Steffen PIERSTORF
Daniel Schmitt
Frank Schremmer
Torsten Stoltze
Marcus Wahle
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
Priority to PCT/EP2016/081950 priority Critical patent/WO2018113926A1/fr
Publication of WO2018113926A1 publication Critical patent/WO2018113926A1/fr
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

Links

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
    • H02M1/32—Means for protecting converters other than automatic disconnection
    • 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
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
    • H02J3/00—Circuit arrangements for AC mains or AC distribution networks
    • H02J3/36—Arrangements for transfer of electric power between AC networks via a high-tension DC link
    • 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
    • Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
    • Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
    • Y02E60/60—Arrangements for transfer of electric power between AC networks or generators via a high voltage DC link [HVCD]

Definitions

  • the invention relates to a power converter with a plurality of modules, each having at least two electronic
  • the invention relates to a method for protecting modules of a power converter from overvoltage.
  • Power converters are power electronic circuits for converting electrical energy.
  • AC can be used in DC, DC in AC, AC in AC of other frequency and / or
  • VSC voltage sourced converter
  • the electrical series connection of the modules can achieve high output voltages.
  • the converters are easily adaptable to different voltages (scalable) and a desired output voltage can be generated relatively accurately.
  • Modular multilevel converters are often used in the high voltage range, for example as
  • the invention has for its object to provide a power converter and a method in which the
  • Modules each containing at least two electronic
  • Parasitic electrical variables of the converter for example parasitic resistances, parasitic inductances or parasitic capacitances, which may occur, for example, due to conductor tracks of the converter or the design of the converter hall
  • Modules is thus each a separate protective element in shape assigned to the respective surge arrester.
  • the surge arrester can be optimally adapted to the module, for example by selecting a suitable threshold voltage for the module. If a power converter is built with a higher operating voltage and therefore more modules are connected in series, then no other surge arresters need to be used because the individual surge arresters only have to fit to the respective module, but not to the operating voltage of the module
  • the power converter can in particular be a modular
  • the modules may in particular be bipolar modules.
  • the surge arresters can also be used as decentralized modular surge arresters or as decentralized modular multilevel surge arresters
  • the power converter can be designed so that
  • Surge Absieiter be arranged spatially close to the respective module.
  • the power converter can be designed so that - The surge arrester is low inductively connected to the respective module. This allows the surge arrester to quickly perform its protective function in the event of overvoltage.
  • the power converter can also be designed so that
  • the surge arrester each a metal oxide surge arrester, in particular a metal oxide varistor, is.
  • the power converter can be designed so that
  • the two electronic switching elements of the modules are arranged in a half-bridge circuit, or
  • the modules each have the two electronic switching elements and two other electronic switching elements, wherein the two electronic switching elements and the two other electronic switching elements in one
  • such a module also becomes a half-bridge module or a half-bridge submodule
  • such module also referred to as a full bridge module or as a full bridge submodule.
  • Disclosed is still a method for protecting
  • Converter has a plurality of modules and each module has at least two electronic switching elements and an electrical energy storage, wherein in the
  • each module has a first terminal and a second terminal, and the first terminal and the second terminal become electrically conductive (when an overvoltage occurs) by means of the surge absorber (exclusively) associated with this module
  • a method for protecting modules of a power converter from overvoltage wherein the power converter has a plurality of modules and each module has at least two electronic modules
  • modules When an overvoltage occurs on several modules, these modules are each electrically bridged by means of a surge arrester, which is (exclusively) associated with the respective module.
  • Figure 1 shows an embodiment of a power converter, which has a plurality of modules
  • Figure 2 shows an embodiment of a module
  • FIG. 3 shows another embodiment of a module
  • FIG. 4 shows an exemplary embodiment of a high-voltage
  • FIG. 5 shows an exemplary embodiment of a reactive power
  • FIG. 6 shows an exemplary sequence of the method for
  • Multilevel converter 1 (modular multilevel converter, MMC).
  • MMC modular multilevel converter
  • This multi-level power converter 1 has a first AC voltage connection 5, a second alternating voltage terminal ⁇ 7 and a third AC voltage terminal.
  • the first AC voltage terminal 5 is electrically connected to a first phase module branch 11 and a second phase module branch 13.
  • the first phase module branch 11 and the second phase module branch 13 form a first phase module 15 of the power converter 1.
  • Phase module branch 11 is electrically connected to a first DC voltage connection 16; that the first
  • Phase module branch 13 is connected to a second
  • the first DC voltage terminal 16 electrically connected.
  • the first DC voltage terminal 16 is a positive one
  • the second DC voltage terminal 17 is a negative DC voltage terminal.
  • DC voltage terminal 17 is applied to a DC voltage Ud.
  • the second AC voltage terminal 7 is electrically connected to one end of a third phase module branch 18 and to one end of a fourth phase module branch 21.
  • the third phase module branch 18 and the fourth phase module branch 21 form a second phase module 24.
  • the third alternating voltage terminal 9 is connected to one end of a fifth
  • Phase module branch 27 Phase module branch 27 and with one end of a sixth
  • Phase module branch 29 electrically connected.
  • Phase module branch 27 and the sixth phase module branch 29 form a third phase module 31.
  • Phase module branch 27 are electrically connected to the first DC voltage connection 16.
  • the second AC terminal 7 remote from the end of the fourth phase ⁇ module branch 21 and the third AC terminal 9 opposite end of the sixth phase module branch 29 are electrically connected to the second DC voltage terminal 17.
  • the first phase module branch 11, the third phase module branch 18 and the fifth phase module branch 27 form a positive-side converter element 32; the second phase module branch 13, the fourth phase module branch 21 and the sixth phase module branch 29 form a negative-side converter element 33.
  • Each phase module branch has a plurality of modules (1_1, 1_2, 1_3, ... l_n; 2_1 ... 2_n; etc.) which are electrically connected in series (by means of their galvanic current connections). Such modules are also referred to as submodules. In the exemplary embodiment of FIG. 1, each phase module branch has n modules. The number of means of their galvanic
  • Power connections electrically connected in series modules can be very different, at least two modules are connected in series, but it can also be, for example, 3, 50, 100 or more modules connected electrically in series. in the
  • the other phase module branches 13, 18, 21, 27 and 29 are of similar construction.
  • Power converter 1 are optical messages or optical signals via an optical communication link (for example via an optical waveguide) to the individual
  • Transfer modules 1_1 to 6_n For example, the control device sends one to the individual modules
  • the modules 1_1 to 6_n are each with a
  • Surge arrester is assigned to exactly one module.
  • module 3_2 is exactly that
  • each module is a separate one
  • the surge arrester is connected in parallel to the respective module.
  • the surge arrester in the exemplary embodiment is a metal oxide surge arrester, in particular a
  • the method for protecting modules of the power converter 1 against overvoltage thus runs so that when an overvoltage occurs on one of the modules of this module by means of (exclusively or exclusively) this module associated surge arrester is electrically bridged.
  • modules are each electrically bridged by means of a respective surge arrester, which is assigned (exclusively) to the respective module.
  • a module 201 is shown by way of example. This may be, for example, the module l_n of the first phase module branch 11 (or else one of the other modules illustrated in FIG. 1).
  • the module is designed as a half-bridge module 201.
  • the module 201 has a first on and off switchable electronic
  • Switching element 202 (first electronic switching element 202) with a first antiparallel-connected diode 204 (first freewheeling diode 204) on. Furthermore, the module 201 has a second switchable on and off electronic switching element 206 (second electronic switching element 206) with a second antiparallel-connected diode 208 (second
  • the first electronic switching element 202 and the second electronic switching element 206 are each configured as an IGBT (insulated-gate bipolar transistor).
  • the first electronic switching element 202 is electrically connected in series with the second electronic switching element 206.
  • a first (galvanic) module connection 212 At the connection point between the two electronic switching elements 202 and 206, a first (galvanic) module connection 212
  • a second (galvanic) module connection 215 is arranged at the connection of the second switching element 206, which is opposite to the connection point.
  • the second module connection 215 is furthermore connected to a first connection of the energy store 210; a second terminal of the energy storage 210 is electrically connected to the
  • Module terminal 215 either the voltage of the energy storage 210 is output or no voltage is output (i.e., a zero voltage is output).
  • the control of the first switching element 202 and the second switching element 206 takes place in the exemplary embodiment by means of the (above-mentioned) transmitted from the control device of the power converter to the module message or signal.
  • the surge arrester Al_n (see FIG. 1) connects the first module terminal 212 and the second module terminal 215.
  • the surge arrester Al_n is therefore connected in parallel to the module 201 (here: parallel to the module I_n).
  • FIG. 3 shows a further exemplary embodiment of a module 301 of the modular multilevel converter.
  • This module 301 can be, for example, the module 1_1 (or also one of the other modules shown in FIG. 1).
  • first electronic switching element 202 second electronic switching element 202
  • Switching element 306 with a fourth anti-parallel connected freewheeling diode 308 on.
  • the third electronic switching element 302 and the fourth electronic switching element 306 are each configured as an IGBT. In contrast to
  • the module 301 of FIG. 3 is a so-called full-bridge module 301.
  • This full-bridge module 301 is characterized in that, when appropriately controlled, it is connected to a center of an electrical series connection of the third electronic switching element 302 and the fourth electronic switching element 306 the four
  • (Galvanic) module connection 315 selectively either the positive voltage of the energy storage 210, the negative voltage of the energy storage 210 or a voltage of zero (zero voltage) can be output. Thus, therefore, by means of the full bridge module 301, the polarity of the output voltage can be reversed.
  • the power converter 1 can have either only half-bridge modules 201, only full-bridge modules 301 or also half-bridge modules 201 and full-bridge modules 301. Via the first module connection 212 and the second module connection 215, 315 flow large electrical currents of the power converter.
  • FIG. 4 schematically shows an exemplary embodiment of a high-voltage direct-current transmission system 401.
  • This high-voltage DC transmission system 401 has two power converters 1, as shown in FIG. These two power converters 1 are electrically connected to one another on the DC voltage side via a high-voltage direct current connection 405. The two are positive
  • DC terminals 16 of the power converters 1 are electrically connected to each other by means of a first high-voltage DC line 405a; the two negative DC voltage connections 17 of the two power converters 1 are electrically connected to one another by means of a second high-voltage direct-current line 405b.
  • High voltage DC transmission system 401 can be
  • FIG. 5 shows an exemplary embodiment of a power converter 501, which is a reactive power compensator 501. This power converter 501 has only the three
  • the three phase modules 11, 18 and 27 are connected in a triangular manner, i. the three phase modules 11, 18 and 27 are connected in a delta connection. Each vertex of the delta connection is electrically connected to a respective phase line 515, 517 and 519 of the three-phase AC network 511. (In another embodiment, the three phase modules can also be connected in a star connection instead of in delta connection.)
  • the converter 501 can supply the AC voltage network 511 with reactive power or remove reactive power from the AC voltage network 511.
  • FIG. 6 the method for protecting modules of a power converter against overvoltage is shown once again by means of a flowchart.
  • Step 604 Occurrence of overvoltage on one (or more) of the modules.
  • Surge arrester which is assigned exclusively to the respective module). It was a power converter with a plurality of modules and a method for protecting modules of the
  • Each module is assigned a (separate) surge arrester, which protects only the respective module against overvoltage.
  • surge arresters are thus distributed over the modules to be protected.
  • the surge arresters are arranged adjacent to the respective module to be protected, ie spatially close to the respective module to be protected.
  • the arrangement of the surge arrester has a number of advantages:

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

Abstract

L'invention concerne un convertisseur (1) comprenant une pluralité de modules (1_1 ... 6_n), qui comportent chacun au moins deux éléments de commutation électroniques (202, 206) et un accumulateur d'énergie électrique (210). Les modules (1_1... 6_N) sont chacun pourvus d'un dispositif de protection contre les surtensions (A1_1... A6_n).
PCT/EP2016/081950 2016-12-20 2016-12-20 Convertisseur Ceased WO2018113926A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
PCT/EP2016/081950 WO2018113926A1 (fr) 2016-12-20 2016-12-20 Convertisseur

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
PCT/EP2016/081950 WO2018113926A1 (fr) 2016-12-20 2016-12-20 Convertisseur

Publications (1)

Publication Number Publication Date
WO2018113926A1 true WO2018113926A1 (fr) 2018-06-28

Family

ID=57821914

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/EP2016/081950 Ceased WO2018113926A1 (fr) 2016-12-20 2016-12-20 Convertisseur

Country Status (1)

Country Link
WO (1) WO2018113926A1 (fr)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN110768266A (zh) * 2019-12-03 2020-02-07 国网江苏省电力有限公司常州供电分公司 用于变电站的无功补偿系统及其控制方法
DE102022125675A1 (de) * 2022-10-05 2024-04-11 Maschinenfabrik Reinhausen Gmbh Kombinierte Erdungs- und Schutzeinrichtung für einen modular aufgebauten Spannungs- und Leistungswandler

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102005040543A1 (de) * 2005-08-26 2007-03-01 Siemens Ag Stromrichterschaltung mit verteilten Energiespeichern
EP2852043A1 (fr) * 2013-09-23 2015-03-25 Alstom Technology Ltd Améliorations apportées ou relatives à des modules de puissance destinés à être utilisés dans des réseaux de transmission de puissance
CN103050955B (zh) * 2012-12-07 2015-03-25 国网智能电网研究院 一种模块化多电平电压源换流阀的过电压保护方法
DE202014002953U1 (de) * 2014-04-07 2015-07-09 Stefan Goetz Elektrisches Energiespeichersystem
EP3068008A1 (fr) * 2015-03-12 2016-09-14 General Electric Technology GmbH Améliorations apportées ou relatives à des convertisseurs de puissance à courant continu à haute tension

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102005040543A1 (de) * 2005-08-26 2007-03-01 Siemens Ag Stromrichterschaltung mit verteilten Energiespeichern
CN103050955B (zh) * 2012-12-07 2015-03-25 国网智能电网研究院 一种模块化多电平电压源换流阀的过电压保护方法
EP2852043A1 (fr) * 2013-09-23 2015-03-25 Alstom Technology Ltd Améliorations apportées ou relatives à des modules de puissance destinés à être utilisés dans des réseaux de transmission de puissance
DE202014002953U1 (de) * 2014-04-07 2015-07-09 Stefan Goetz Elektrisches Energiespeichersystem
EP3068008A1 (fr) * 2015-03-12 2016-09-14 General Electric Technology GmbH Améliorations apportées ou relatives à des convertisseurs de puissance à courant continu à haute tension

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN110768266A (zh) * 2019-12-03 2020-02-07 国网江苏省电力有限公司常州供电分公司 用于变电站的无功补偿系统及其控制方法
CN110768266B (zh) * 2019-12-03 2021-03-30 国网江苏省电力有限公司常州供电分公司 用于变电站的无功补偿系统及其控制方法
DE102022125675A1 (de) * 2022-10-05 2024-04-11 Maschinenfabrik Reinhausen Gmbh Kombinierte Erdungs- und Schutzeinrichtung für einen modular aufgebauten Spannungs- und Leistungswandler

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