WO2018145748A1 - Connexion en parallèle de modules de cellule dans un convertisseur modulaire multiniveau au moyen de transformateurs interphase - Google Patents

Connexion en parallèle de modules de cellule dans un convertisseur modulaire multiniveau au moyen de transformateurs interphase Download PDF

Info

Publication number
WO2018145748A1
WO2018145748A1 PCT/EP2017/052876 EP2017052876W WO2018145748A1 WO 2018145748 A1 WO2018145748 A1 WO 2018145748A1 EP 2017052876 W EP2017052876 W EP 2017052876W WO 2018145748 A1 WO2018145748 A1 WO 2018145748A1
Authority
WO
WIPO (PCT)
Prior art keywords
conductor
pebb
conductors
mmc
windings
Prior art date
Application number
PCT/EP2017/052876
Other languages
English (en)
Inventor
Kalle ILVES
Muhammad Nawaz
Nan Chen
Original Assignee
Abb Schweiz Ag
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 Schweiz Ag filed Critical Abb Schweiz Ag
Priority to PCT/EP2017/052876 priority Critical patent/WO2018145748A1/fr
Publication of WO2018145748A1 publication Critical patent/WO2018145748A1/fr

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
    • 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
    • H02M7/493—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 the static converters being arranged for operation in parallel
    • 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
    • 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
    • H02M1/0043—Converters switched with a phase shift, i.e. interleaved
    • 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
    • H02M1/0064—Magnetic structures combining different functions, e.g. storage, filtering or transformation

Definitions

  • the present disclosure relates to parallel-connected single-phase power converters.
  • Figure ⁇ shows a standard parallel connection of a plurality of single-phase power converters Bia-e.
  • the converters Bia-e are connected together to a common output via inductors B2a-e. In this way, a multilevel waveform can be obtained at the output. If any number n of 2-level converters Bia-n are connected in parallel, n+i levels can be obtained at the output.
  • PEBB Power Electronic Building Blocks
  • MMC Modular Multilevel Converter
  • magnetically coupled inductors are arranged such that the flux generated by the load current is cancelled, which will allow for a more compact inductor design.
  • an MMC 40 comprising at least one phase leg comprising a plurality of cascaded converter cells.
  • Each converter cell comprises a number of N parallel connected PEBB, each PEBB comprising an energy storage, a plurality of semiconductor switching devices, a first conductor terminal connecting a first conductor and a second conductor terminal connecting a second conductor.
  • Each converter cell also comprises an inductor arrangement comprising a number of N inductors, each inductor comprising two conductor windings on the same core, a first conductor winding of one of the first and second conductors of one of the N PEBB and a second conductor winding of one of the first and second conductors of another of the N PEBB.
  • the first and second conductors comprise two conductor windings, one of the two conductor windings of each of two of the N inductors.
  • a converter cell for an MMC.
  • the converter cell comprises a number of N parallel connected PEBB, each PEBB comprising an energy storage, a plurality of semiconductor switching devices, a first conductor terminal connecting a first conductor and a second conductor terminal connecting a second conductor.
  • the converter cell also comprises an inductor arrangement comprising a number of N inductors, each inductor comprising two conductor windings on the same core, a first conductor winding of one of the first and second conductors of one of the N PEBB and a second conductor winding of one of the first and second conductors of another of the N PEBB.
  • the first and second conductors comprise two conductor windings, one of the two conductor windings of each of two of the N inductors.
  • N is an integer of at least two and is used for both the number of PEBB and the number of inductors, indicating that the number of PEBB and inductors in the converter cell is the same.
  • Fig l is a schematic circuit diagram of parallel connected single-phase converters in accordance with prior art.
  • Fig 2 is a schematic circuit diagram of parallel connected single-phase converters by means of an embodiment of an inductor arrangement in accordance with the present invention.
  • Fig 3 is a schematic illustration of an embodiment of an inductor of an inductor arrangement in accordance with the present invention.
  • Fig 4 is a schematic circuit diagram of an embodiment of parallel connected PEBB in cells of an MMC, in accordance with the present invention.
  • Fig 5 is a schematic circuit diagram of an embodiment of parallel connected PEBB by means of an inductor arrangement in an MMC cell, in accordance with the present invention.
  • Fig 6 is a schematic circuit diagram of another embodiment of parallel connected PEBB by means of an inductor arrangement in an MMC cell, in accordance with the present invention.
  • an inductor arrangement 2 in accordance with figure 2 may be used.
  • the load current through each inductor should preferably only generate a low flux in the core 3 of the inductor by winding the first and second windings 4a and 4b of each of the inductors 2 such that their respective currents are generating inducted currents in the core which substantially cancel each other out.
  • Figure 3 illustrates this in an embodiment of the inductor 2ab.
  • the differential current between the converters 1 may be limited by connecting two windings 4a and 4b to the same core 3.
  • N cores 3 may be used to interconnect N single-phase converters 1 as illustrated in figure 2.
  • the output of the N converters may be connected in a daisy-chain pattern by the inverters 2.
  • phase- shifted carrier modulation may be used for the different converter modules 1. Although this may increase the differential mode current during nominal operation, significant improvements may be achieved in terms of harmonic performance. Accordingly, there may be a trade-off between harmonic performance and required size of the magnetic components. How this tradeoff is best performed may differ from one application to another.
  • Figure 2 illustrates an embodiment of an Alternating Current (AC) to Direct Current (DC) converter 1 comprising a plurality of converter modules la-e, and an inductor arrangement 20, on the AC side of the converter 1, comprising a plurality of inductors 2, each inductor comprising two conductor windings 4 on the same core 3, a first conductor winding 4a of a conductor a or b of one of the converter modules and a second conductor winding 4b of one of a conductor a or b of another (typically adjacent) converter module.
  • AC Alternating Current
  • DC Direct Current
  • inductors 2 is the same as the number of converter modules, why conductors connected to each converter modules comprise two conductor windings in two different inductors, since each inductor has two conductor windings 4 (from different converter modules) on the same core, as shown in figure 3.
  • the present invention relates to using this way of parallel connecting single- phase converter modules to parallel connect a plurality of PEBB 43 in a cell 42 of an MMC 40.
  • the discussion above relating to converter modules 1 and inductor arrangement 20 is thus also relevant to the PEBB 43 and inductor arrangement 20 discussed herein.
  • FIG. 4 illustrates a part of an MMC 40, e.g. a STATCOM, comprising at least one phase leg 41.
  • Each phase leg comprises a plurality of cascaded (i.e. series connected) converter cells 42, here a first cell 42a and a second cell 42b are shown.
  • Each cell 42 comprises a plurality of PEBB 43, each PEBB comprising an energy storage 44 (e.g. a capacitor or battery arrangement) and a plurality of semiconductor switching devices 45, e.g. MOSFET.
  • Any number of PEBB may be parallel connected in the cell.
  • the PEBB are parallel connected to each other by means of the inductor arrangement 20.
  • the PEBB are parallel connected in such a way that the respective energy storages 44 of the PEBB are not directly parallel connected with each other by virtue of the semiconductor switching devices 45.
  • the semiconductor switching devices may form any convenient topology, such as the half-bridge topology of the example of figure 4 in which each PEBB 43 comprises a first semiconductor switching device 45a and a second semiconductor switching device 45b.
  • the semiconductor switching devices may form e.g. a full-bridge topology (in which each PEBB comprises four semiconductor switching devices 45) or a three-level topology.
  • FIG. 5 and 6 illustrates different embodiments of the inductor
  • Each PEBB 43 comprises a first conductor terminal A connecting a first electrical conductor a, and a second conductor terminal B connecting a second electrical conductor b.
  • the paralleling of the PEBB includes that the first conductors a of each PEBB are connected at a first Point of Common Coupling (PCC) PCCa, and the second conductors b of each PEBB are connected at a second Point of Common Coupling (PCC) PCCb, from each of which PCCa and PCCb the cell 42 is connected to its neighbouring cells of the cascaded cells at references X and Y, respectively.
  • the inductor arrangement 20 is similar to that of figure 2, in that it is only the first conductor a of each PEBB which comprises the conductor windings 4, and thus comprises both of the two conductor windings 4a and 4b of each PEBB.
  • the asterisks * indicate the magnetic coupling direction in each of the inductors 2ab, 2bc and 2ca, which implies that the respective winding directions of the first and second conductor windings 4a and 4b are anti-parallel (as also shown in figure 3) since all windings 4 are by the first conductors a (all conducting either positive or negative current).
  • the first and second conductor a and b, of each PEBB 43 each comprises one conductor winding in an inductor 2.
  • the total number of conductor windings 4 provided in total by the first and second conductors a and b of each PEBB is still two, one in each of two different inductors 2 (as in the embodiment of figure 5 where both windings are provided by the same conductor).
  • the magnetic coupling orientations of the firs and second conductor windings 4a and 4b relative each other are also different compared with the
  • each inductor 2 in the embodiment of figure 6 having one conductor winding of a first conductor a and one conductor winding of a second conductor b.
  • embodiments of the present invention may be used to realize a cell of a cascaded (also called chain-link) multilevel converter by paralleling half- bridge PEBB 43 as shown in figures 4-6.
  • the required energy storage in each cell 42 may be split into several smaller capacitors which are not directly parallel connected. This may provide advantages for fault handling in cells where the stored energy is difficult to handle and may even result in an explosion in the event of a fault.
  • the two conductor windings 4a and 4b comprised in the first and second conductors are comprised in one of said first and second conductors a or b (for example as in the embodiment of figure 5).
  • one of the conductor windings 4a or 4b is comprised in the first conductor a and the other of the conductor windings 4a or 4b is comprised in the second conductor b (for example as in the
  • the semiconductor switching devices 45 form a half- bridge in each of the N PEBB 43, e.g. in an AC-DC MMC.
  • the semiconductor switching devices 45 form a full-bridge in each of the N PEBB 43, e.g. in a STATCOM.
  • the MMC 40 is an AC-AC converter, e.g. a STATCOM. In some other embodiments, he MMC 40 is an AC-DC converter.
  • the energy storage 44 comprises a capacitor arrangement comprising one or more capacitor elements, and/or the energy storage 44 comprises a battery.

Landscapes

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

Abstract

La présente invention concerne un convertisseur multiniveau modulaire (MMC) 40 comprenant au moins une branche de phase 41 comprenant une pluralité de cellules de convertisseur en cascade 42. Chaque cellule de convertisseur comprend un nombre de N blocs de construction électroniques de puissance connectés en parallèle (PEBB) 43, chaque PEBB comprenant un stockage d'énergie 44, une pluralité de dispositifs de commutation à semi-conducteur 45, une première borne de conducteur A connectant un premier conducteur a et une seconde borne de conducteur B connectant un second conducteur b. Chaque cellule de convertisseur comprend également un agencement de bobine d'induction 20 comprenant un nombre de N bobines d'induction 2, chaque bobine d'induction comprenant deux enroulements conducteurs sur le même noyau, un premier enroulement conducteur de l'un des premier et second conducteurs a ou b de l'un des N PEBB et un second enroulement conducteur de l'un des premier et second conducteurs a ou b d'un autre des N PEBB. Pour chacun des N PEBB, les premier et second conducteurs a et b comprennent deux enroulements conducteurs, l'un des deux enroulements conducteurs de chaque paire de bobines parmi les N bobines d'induction.
PCT/EP2017/052876 2017-02-09 2017-02-09 Connexion en parallèle de modules de cellule dans un convertisseur modulaire multiniveau au moyen de transformateurs interphase WO2018145748A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
PCT/EP2017/052876 WO2018145748A1 (fr) 2017-02-09 2017-02-09 Connexion en parallèle de modules de cellule dans un convertisseur modulaire multiniveau au moyen de transformateurs interphase

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
PCT/EP2017/052876 WO2018145748A1 (fr) 2017-02-09 2017-02-09 Connexion en parallèle de modules de cellule dans un convertisseur modulaire multiniveau au moyen de transformateurs interphase

Publications (1)

Publication Number Publication Date
WO2018145748A1 true WO2018145748A1 (fr) 2018-08-16

Family

ID=58009831

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/EP2017/052876 WO2018145748A1 (fr) 2017-02-09 2017-02-09 Connexion en parallèle de modules de cellule dans un convertisseur modulaire multiniveau au moyen de transformateurs interphase

Country Status (1)

Country Link
WO (1) WO2018145748A1 (fr)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN109617114A (zh) * 2018-12-21 2019-04-12 西安交通大学 一种串并联多重化结合的模块化多电平换流器
WO2021194130A1 (fr) * 2020-03-23 2021-09-30 엘에스일렉트릭 (주) Système de conditionnement d'énergie supportant un remplacement à chaud et procédé de commande de système de conditionnement d'énergie

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2010097122A1 (fr) * 2009-02-27 2010-09-02 Abb Technology Ltd Convertisseur de source de tension modulaire
US20130026841A1 (en) * 2010-03-23 2013-01-31 Falah Hosini Voltage Source Converter And A Method For Fault Handling Thereof
EP2869452A1 (fr) * 2013-08-30 2015-05-06 Huawei Technologies Co., Ltd. Circuit et système de conversion de puissance
WO2015124165A1 (fr) * 2014-02-18 2015-08-27 Abb Technology Ltd Convertisseur pour un système à courant alternatif

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2010097122A1 (fr) * 2009-02-27 2010-09-02 Abb Technology Ltd Convertisseur de source de tension modulaire
US20130026841A1 (en) * 2010-03-23 2013-01-31 Falah Hosini Voltage Source Converter And A Method For Fault Handling Thereof
EP2869452A1 (fr) * 2013-08-30 2015-05-06 Huawei Technologies Co., Ltd. Circuit et système de conversion de puissance
WO2015124165A1 (fr) * 2014-02-18 2015-08-27 Abb Technology Ltd Convertisseur pour un système à courant alternatif

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
BOILLAT D O ET AL: "Modeling and experimental analysis of a Coupling Inductor employed in a high performance AC power source", RENEWABLE ENERGY RESEARCH AND APPLICATIONS (ICRERA), 2012 INTERNATIONAL CONFERENCE ON, IEEE, 11 November 2012 (2012-11-11), pages 1 - 18, XP032440255, ISBN: 978-1-4673-2328-4, DOI: 10.1109/ICRERA.2012.6477401 *

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN109617114A (zh) * 2018-12-21 2019-04-12 西安交通大学 一种串并联多重化结合的模块化多电平换流器
WO2021194130A1 (fr) * 2020-03-23 2021-09-30 엘에스일렉트릭 (주) Système de conditionnement d'énergie supportant un remplacement à chaud et procédé de commande de système de conditionnement d'énergie

Similar Documents

Publication Publication Date Title
US10873265B2 (en) Bidirectional three-phase direct current (DC)/DC converters
Diab et al. A dual modular multilevel converter with high-frequency magnetic links between submodules for MV open-end stator winding machine drives
CN108574420B (zh) 电力电子变换单元及系统
US9502991B2 (en) Hybrid converter and wind power generating system
US7050311B2 (en) Multilevel converter based intelligent universal transformer
EP3387745B1 (fr) Système et procédé d'intégration de stockage d'énergie dans un convertisseur de puissance modulaire
JP5977287B2 (ja) マルチレベルインバータ
US10177684B2 (en) Converter for an AC system
CN102334274A (zh) 转换器
US11881792B2 (en) Electrical converter
WO2013075735A1 (fr) Convertisseur cc/cc haute tension avec transformateur commandé par des convertisseurs multi-niveaux modulaires (mmc)
Ahmed et al. A highly reliable single-phase high-frequency isolated double step-down AC–AC converter with both noninverting and inverting operations
Sahoo et al. High frequency link multi-winding power electronic transformer using modular multilevel converter for renewable energy integration
KR101297080B1 (ko) 직렬보상 하프 브릿지 다중 모듈 컨버터
Patil et al. Review and Comparison of MV grid-connected Extreme Fast Charging Converters for Electric Vehicles
WO2018145748A1 (fr) Connexion en parallèle de modules de cellule dans un convertisseur modulaire multiniveau au moyen de transformateurs interphase
CN106803719B (zh) 无桥臂电抗器的高压模块化多电平隔离型直流变压器
EP3796528A1 (fr) Équilibrage de courant dans des semiconducteurs de puissance d'un convertisseur cc/cc
Sankala et al. Modular double‐cascade converter for high‐power medium‐voltage drives
Ding et al. An input-series-output-series modular multilevel DC transformer with inter-module arithmetic phase interleaving control to reduce DC ripples
Gandomi et al. Five-Level T-type converter based fault-tolerant isolated DC-DC topology using WBG devices
Laka et al. IP-ZSBT magnetic configuration for parallelization–serialization of three-phase high power converters
Hu et al. Integration of multiple modularized distributed energy resource devices into AC grid of buildings: Issue of active power circulation
Jones et al. Construction and testing of a 13.8 kV, 750 kVA 3-Phase current compensator using modular switching positions
Cheng et al. The topology analysis and compare of high-frequency power electronic transformer

Legal Events

Date Code Title Description
121 Ep: the epo has been informed by wipo that ep was designated in this application

Ref document number: 17704249

Country of ref document: EP

Kind code of ref document: A1

DPE1 Request for preliminary examination filed after expiration of 19th month from priority date (pct application filed from 20040101)
NENP Non-entry into the national phase

Ref country code: DE

122 Ep: pct application non-entry in european phase

Ref document number: 17704249

Country of ref document: EP

Kind code of ref document: A1