EP3245723A1 - Convertisseur continu-continu - Google Patents

Convertisseur continu-continu

Info

Publication number
EP3245723A1
EP3245723A1 EP15707941.9A EP15707941A EP3245723A1 EP 3245723 A1 EP3245723 A1 EP 3245723A1 EP 15707941 A EP15707941 A EP 15707941A EP 3245723 A1 EP3245723 A1 EP 3245723A1
Authority
EP
European Patent Office
Prior art keywords
converter
voltage
submodules
module
arms
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
EP15707941.9A
Other languages
German (de)
English (en)
Inventor
Mark-Matthias Bakran
Andre SCHÖN
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
Original Assignee
Siemens 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 Siemens AG filed Critical Siemens AG
Publication of EP3245723A1 publication Critical patent/EP3245723A1/fr
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
    • H02M3/00—Conversion of dc power input into dc power output
    • H02M3/02—Conversion of dc power input into dc power output without intermediate conversion into ac
    • H02M3/04—Conversion of dc power input into dc power output without intermediate conversion into ac by static converters
    • H02M3/10—Conversion of dc power input into dc power output without intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode
    • H02M3/145—Conversion of dc power input into dc power output without intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal
    • H02M3/155—Conversion of dc power input into dc power output without intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal using semiconductor devices only
    • H02M3/156—Conversion of dc power input into dc power output without intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal using semiconductor devices only with automatic control of output voltage or current, e.g. switching regulators
    • H02M3/158—Conversion of dc power input into dc power output without intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal using semiconductor devices only with automatic control of output voltage or current, e.g. switching regulators including plural semiconductor devices as final control devices for a single load
    • 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 DC-DC converter having a converter branch extending between high-voltage DC poles and having a first and a second converter arm electrically connected to a potential point connected to a first undervoltage-side DC pole, the second converter arm being between the potential point between the converter arms and a second undervoltage-side DC voltage pole extends, and each of the converter arms has switched on and off power semiconductor switches, and an energy exchange branch for the exchange of energy between the two
  • Converter arms extending between the upper voltage side DC poles parallel to the converter branch.
  • DC voltage converters are used, for example, in the coupling of DC voltage networks of different voltage levels.
  • DC-DC converters are needed for coupling high-voltage DC transmission links.
  • the power to be transformed can reach up to several 1000 MW. For such applications neither the solutions known from the AC transmission nor from the medium voltage can be used.
  • DC-DC converters are known from the prior art in this connection known by two "front-to-front.” -.-Coupled inverters are realized The two order ⁇ rectifiers via a transformer are AC connected to one another, the transformer required in this known DC-DC converter comprises a heavy weight and is relatively expensive.
  • a DC-DC converter of the type mentioned at the outset is known from the article "The Multilevel Modular DC Converter” by JA Fereira, IEEE Transactions on Power Electronics, Vol. 28, No. 10, October 2013, known.
  • the described therein DC-DC Converters ⁇ tension is outlined in FIG. 1
  • the DC converter ⁇ transforms a voltage dropped across high side DC voltage Ul Poland in a dropping at undervoltage side DC voltage poles voltage U2 (or vice versa). It has a series of filter circuit 2 of an inductor and a capacitor 3 the energy from branch exchange ⁇ 4th
  • Each of the converter arms 5, 6 comprises a series connection of full-bridge or half-bridge submodules 7, which are equipped with energy stores.
  • the object of He ⁇ invention is to propose a DC-DC converter, which is as cost effective and reliable.
  • the object is achieved by a converter module with a series circuit of two-pole submodules, which is arranged between the potential point zwi ⁇ tween the two converter arms and the first undervoltage-side DC voltage pole in a art-like DC-DC converter, wherein the
  • Submodules having an energy store and at least one Leis ⁇ semiconductor switch and may be controlled such that at the poles of the submodules falls a positive or ne gative ⁇ Submodulschreib or a voltage with the value zero.
  • An advantage of the DC-DC converter according to the invention is its transformerless operation. Since no transforma- Tor is required, the weight of the DC voltage ⁇ converter can be reduced compared to some known DC-DC converters. Another advantage arises from the possibility that Se ⁇ rien circuit of the sub-modules of the converter module for protection of the DC-DC converter and a connected supply network in case of failure, such as a short circuit in one of the devices connected to the DC-DC converter DC cables. In this way, an integrated protection is realized in a coupling of high-voltage DC transmission links (HVDC lines) of different nominal voltage.
  • HVDC lines high-voltage DC transmission links
  • each of the two converter arms generates a converter voltage as DC voltage superposed by an AC voltage, so that the sum of the two converter voltages always corresponds to the DC voltage dropping across the DC voltage side DC poles.
  • Via the converter branch and the energy exchange ⁇ branch flows an alternating circuit current with a frequency of the AC voltage component generated in the converter arms of the
  • the DC-DC converter according to the invention is essentially a freely controllable voltage source.
  • the DC ⁇ converter can deliver its energy interpretation or absorb reactive power in the frame. Only a direct current flows through the converter module so that on average there is no active power to be exchanged.
  • the converter arms each have a number scarf ⁇ tung bipolar converter submodules, wherein each submodule converter on and off power semiconductors comprises scarf ⁇ ter.
  • Each converter submodule suitably comprises an energy store.
  • each of the converter submodules can be controlled individually. In this way a so- ⁇ -called modular Mehrmenumrichter (MMC) is realized.
  • MMC modular Mehrmenumrichter
  • the converter submodules are also knowbil ⁇ det as half-bridge circuits .
  • a half-bridge circuit comprises a series connection of two power semiconductor switching units with the same conducting direction, wherein each power semiconductor switch unit we ⁇ iquess comprises a mono- and turn-off power semiconductor switch.
  • the half-bridge circuit comprises an energy store, for example a power capacitor, which is arranged parallel to the series circuit of the power semiconductor switching units.
  • the half-bridge circuit has two terminals or poles, wherein a first terminal is connected to one of the power semiconductor switching units and to the energy store and the other is arranged at a potential point between the power semiconductor terminal switching units.
  • Half-bridge circuits are relatively inexpensive and have relatively low forward losses during normal operation.
  • the converter submodules are designed as full bridge circuits.
  • the full bridge circuit comprises two parallel series circuits of two power semiconductor switching circuits each. units with on / off switchable power semiconductor switches.
  • An energy store for example a power capacitor, is arranged in parallel with the series circuits.
  • the full-bridge circuit allows a drive so that a positive or negative submodule voltage or a voltage with the value zero drops at the poles of the submodule.
  • the submodule voltage preferably corresponds to an energy storage voltage dropping at the energy store.
  • At least one converter submodule is implemented as a half bridge circuit and at least one further converter submodule as a full bridge circuit.
  • the submodules of the converter module preferably have power semiconductor switches. More preferably, the submodules, suitably all submodules, are realized as the full bridge circuits described above. Each of the performance can tung semiconductor switching units of the full-bridge circuit, for example, an Integrated Gate Bipolar Transistor (IGBT) and an antiparallel-connected to the freewheeling diode umfas ⁇ sen. It is conceivable in this context to use backward conductive power semiconductors.
  • IGBT Integrated Gate Bipolar Transistor
  • the energy exchange branch comprises a filter capacitor.
  • the filter capacitor forms a low-pass or resonant circuit with a line inductance of the electrical line in the energy exchange branch.
  • the resonant circuit can be tuned by means of the generated alternating voltage in the converter arms by suitable dimen ⁇ solution of the filter capacitor to the frequency.
  • the energy exchange branch comprising a capacitor and a filter inductor ⁇ board filter.
  • the filter capacitor and filter inductance form the Reso ⁇ nanzscnies in energy exchange branch in this case.
  • the energy exchange branch comprises a further series circuit of converter submodules with power semiconductor switches which can be switched on and off.
  • the converter submodules of the energy exchange branch By means of the converter submodules of the energy exchange branch, an alternating voltage with the frequency of the alternating circuit current can be generated. In this way, a particularly flexible variant of the erfindungsge ⁇ Maessen DC-DC converter is provided.
  • the submodules of the converter module are arranged for limiting and / or switching off an undervoltage-side fault current.
  • Converter module for example, realized as a full bridge circuits, so by a suitable dimensioning of the
  • Converter module for limiting and / or switching off a high voltage side fault current are set up.
  • ⁇ are probably low side and upper voltage side Feh ⁇ lerströme from the DC converter automatically be limited or switched off, it can be dispensed with separate DC scarf ⁇ ter advantageous in the connected DC cables.
  • the energy gieorzweig comprises a third and a fourth Konverterarm Konverterarm, wherein the arms of the converter energy from ⁇ exchange branch each comprising a series circuit bipolar converter sub-modules, each of said converter- Submodule of the energy exchange branch comprises and switchable power semiconductor switches, and further another converter module is provided with a series circuit of two-pole sub-modules, which extends between a potential point between the converter arms of the energy exchange branch and the low-side DC voltage pole.
  • the converter branch a first acti ve ⁇ converter phase and the energy exchange branch forms a second active converter stage.
  • the two converter modules suitably generate opposing alternating voltages of the same frequency. In this way, a particularly effective and flexible DC-DC converter is provided.
  • the active converter phases can be assigned pairwise alternating circulating currents which, when n active converter phases are used, form an n-phase current system.
  • the sub-modules of the converter module and the sub ⁇ module further converter module are of identical construction. Due to the use of similar components, costs of the DC-DC converter can be reduced.
  • the DC-DC converter comprises connecting means for connecting the DC-DC converter to an AC voltage network.
  • the connecting means allow a direct connection of the DC-DC converter to an AC voltage network.
  • the AC voltage generated by the series circuit can thus be fed as needed into the AC mains.
  • the connecting means comprise a transformer which can be connected on the primary side to the AC voltage network and on the secondary side to the series circuit of the converter module and / or of the series connection of the further converter module.
  • the DC-DC converter according to the invention can be designed both monopolar and bipolar.
  • a voltage of a bipolar high-voltage side DC voltage line is transformed into a voltage of a bipolar voltage side DC voltage side voltage line (or vice versa).
  • the bipolar embodiment of the DC-DC converter therefore suitably has a first converter branch, which extends between a positive high-side DC voltage pole and a neutral, for example grounded, DC voltage pole and a second
  • a first and a second energy exchange branch are suitably provided, which are parallel to the first or to the second
  • Converter branches is assigned in each case a converter module in Wesentli ⁇ Chen in the manner as described in connection with the monopolar versions of the DC-DC converter according to the invention previously.
  • Figure 2 shows a first embodiment erfindungsge ⁇ MAESSEN DC-DC converter in a schematic representation
  • FIG. 3 shows an embodiment of a
  • FIG. 4 shows a further embodiment of a
  • Figure 5 shows a second embodiment of a ⁇ OF INVENTION DC-DC converter to the invention in schemati ⁇ shear representation
  • Figure 6 shows a third embodiment of a ⁇ OF INVENTION DC-DC converter to the invention in a schematic representation
  • Figure 7 shows a fourth embodiment of a ⁇ OF INVENTION DC-DC converter to the invention in a schematic representation
  • Figure 8 shows a fifth embodiment of a ⁇ OF INVENTION DC-DC converter to the invention in a schematic representation
  • FIG. 9 shows a sixth exemplary embodiment of a DC-DC converter according to the invention in a schematic representation
  • Figure 10 shows a seventh embodiment of a ⁇ OF INVENTION DC-DC converter to the invention in a schematic representation
  • the DC-DC converter 100 comprises a first upper-voltage-side DC voltage pole 12 and a second upper-voltage-side DC voltage pole 13.
  • the upper-side DC voltage poles 12, 13 are arranged for connection to a high-voltage side DC voltage network, not shown in FIG.
  • the falling between the devisitatisseiti ⁇ gen DC voltage poles 12, 13, DC voltage will be referred to with UDC1.
  • the DC-DC converter 100 further includes a converter branch 14.
  • Converter branch 14 has two converter arms: a first converter arm 15 and a second converter arm 16. Furthermore, a first smoothing choke 17 and a second smoothing choke 18 are arranged in the converter branch 14. The two converter arms 15, 16 are in a potential point 19 between the converter arms 15, 16 connected to each other. The first converter arm 15 thus extends between the first upper-voltage-side DC voltage pole 12 and the potential point 19 between the converter arms 15, 16. The second converter arm 16 extends between the potential point 19 and a second undervoltage-side DC voltage pole 20.
  • the second undervoltage-side DC voltage pole 20 and a first undervoltage side Gleichpolpol 21 are adapted to the DC-DC converter 100 with an undervoltage side not shown in Figure 2
  • the first converter arm 15 comprises a series connection of two-pole converter submodules 22 comprising power semiconductor switches.
  • the power semiconductor switch of the con- verter sub-modules 22 are switched on and switched off and can be realized in playing ⁇ by IGBTs.
  • the illustrated in Figure 2 embodiment of the DC-DC converter 100 has three series-connected converter submodules 22 of the first converter arm 15. However, it is conceivable to equip the converter module 15 with any desired number of converter submodules 22 adapted to the respective application, so that their number may well be several hundred.
  • the converter arm 16 is for
  • Converter arm 15 has a similar structure.
  • the converter arm 16 also has a series connection of two-pole converter submodules 22.
  • Parallel to the converter branch 14 extends between the high-side DC voltage poles 12, 13, an energy exchange arm 23.
  • a filter capacitor is arranged ⁇ 24, which is implemented as a power capacitor.
  • the DC-DC converter 100 further includes a converter module 25.
  • the converter module 25 is arranged between the Po ⁇ tenzialddling 19 between the converter arms and the first low side Gleichlastingpol 21st
  • the converter module comprises a series connection of bipolar submodules 26.
  • the number of submodules 26 shown in FIG. 2 is three, but it can be arbitrarily increased depending on the application.
  • the first converter arm 15 In operation, the first converter arm 15 generates a first one
  • the voltage UK1 is composed of an AC voltage component uAC and a DC voltage component.
  • the DC voltage component is dimensioned such that the following relationship applies:
  • UK1 UDC1 - UDC2 - uAC.
  • the second voltage converter UK2 generated.
  • the second voltage converter UK2 is also a superimposition of the AC voltage Vac ⁇ proportion (but opposite polarity), and a DC voltage component.
  • the voltage UDC1 dropping across the upper voltage side DC voltage poles is equal to the sum of the converter voltages generated by the two converter arms 15, 16, or their converter submodules 22.
  • the AC voltage uM1 thus has the same frequency and amplitude as the AC voltage component uAC generated by means of the converter arms. but shifted by one phase ⁇ (is thus provided with a minus sign). In this way, it is achieved that at the low-voltage DC poles Abfal ⁇ loin voltage UDC2 is actually a DC voltage.
  • the means of the converter sub-modules 22 and 26 of the submodules modeled AC voltage component UAC creates a Wech ⁇ selstrom iAC.
  • the alternating current iAC is an alternating circulating current which flows between the converter branch 14 and the energy exchange branch 23.
  • the filter capacitor 24 is tuned to the frequency of the alternating circuit current iAC.
  • the alternating circuit current iAC is superimposed by a direct current IDC1 flowing through the upper voltage side DC voltage poles 12, 13, so that the following applies to a current iDCACl:
  • iDCACl IDC1 + iAC.
  • the alternating circuit current iAC allows an energy exchange between the two converter arms 15, 16 in the converter branch 14.
  • the currents IDC1, IDC2, iAC each flow in a direction indicated by the arrows in the figure 2 direction.
  • FIG. 3 shows an embodiment of a converter- submodule is provided ⁇ 22 of the DC-DC converter 100 in FIG. 2
  • the converter submodule 22 of FIG. 3 is implemented as a half-bridge circuit.
  • the converter submodule 22 is bipolar, that is, the converter submodule 22 has two poles 27 and 28.
  • the converter submodule 22 comprises a first power semiconductor switching unit 29 and a second power semiconductor switching unit 30, wherein the two Power semiconductor switching units 29, 30 are connected in series.
  • the first power semiconductor switching unit 29 comprises a power semiconductor switch 31 which can be switched on and off as well as a freewheeling diode 32 arranged antiparallel to it.
  • the second power semiconductor switching unit 30 has a similar construction to the first power semiconductor switching unit 29.
  • the second power semiconductor switching unit 30 comprises the ⁇ according to a switched on and off power semiconductor switch 33 and an antiparallel arranged freewheeling diode 34.
  • the two power semiconductor switching units 31 and 33 are IGBTs. In the embodiment of FIG. 3, the two power semiconductor switching units 31, 33 are arranged in the same forward direction. Parallel to the series connection to both power semiconductor switching units 31, 33, a power capacitor 35 is arranged.
  • Such a half-bridge circuit is also known from DE 101 03 031 B4.
  • FIG. 4 shows a further exemplary embodiment of a converter submodule 22.
  • the converter submodule 22 of FIG. 4 is realized as a full-bridge circuit.
  • the full-bridge circuit comprises two series circuits of power semiconductor switching units: the first series circuit of the power semiconductor switching units 29, 30 and a second series circuit of power semiconductor switching units 36 and 37.
  • the two series circuits of the power semiconductor switching units 29, 30 and 36, 37 are arranged parallel to each other.
  • the two terminals of the submodule 22 of Figure 4 are to Poten ⁇ potential between the two points nurse Halbleiterschaltein- units of a respective series circuit arranged.
  • a voltage can be generated at the two terminals 27, 28 of the converter submodule 22 which corresponds to the voltage at the converter. capacitor 35, but the voltage of the capacitor 35 with reverse polarity, or generate the voltage zero.
  • the converter submodules 22 of Figures 3 and 4 may be likewise used in the hereinafter described embodiments of the DC converter according to the invention the ⁇ . Furthermore, the submodule 26 of all embodiments of the DC voltage converter according to the invention described in FIGS. 5 to 10 can be realized as a full bridge circuit of FIG.
  • FIG. 5 shows a further embodiment of a ⁇ OF INVENTION DC-DC converter 101 to the invention is shown.
  • the same or similar components are provided with the same reference numerals, so that from
  • the embodiment of the DC-DC converter 101 according to FIG. 5 differs from the DC-DC converter 100 of FIG. 2 in that a filter inductance 42 is arranged in the energy exchange branch 23 in addition to the capacitor 24.
  • the filter inductor 42 and the filter capacitor 24 thus form a resonant circuit in the energy exchange branch 23.
  • This resonant circuit can be tuned to a desired frequency.
  • the resonant circuit is tuned to the frequency of the alternating-Fre ⁇ circuit current iAC.
  • the mode of operation of the embodiments of the DC-DC converter 100 and 101 in FIGS. 2 and 5 is otherwise substantially the same.
  • Figure 6 shows a third embodiment of a DC-DC converter erfindungsge- MAESSEN 102.
  • EMBODIMENTS 2 and the figure 5 comprises the DC-DC converter 102 of Figure 6 in the energy exchange branch 23 a further series circuit of Converter Submodules 22.
  • the further series connection of the converter submodules 22 in the energy exchange branch 23 is composed of a third converter arm 43 and a fourth
  • the third and fourth Konverterarm 43 and 44 are the first and second Konverterarm 15, 16 similarly constructed and connected in a potential point 47 MITEI ⁇ Nander.
  • the energy exchange branch 23 further comprises a third smoothing choke 45 and a fourth smoothing choke 46.
  • a single smoothing choke would be sufficient here, but two are preferred for reasons of symmetry.
  • the converter branch 14 and the energy exchange branch 23 in the embodiment of FIG. 6 are also referred to as (two) active phases of the DC-DC converter, because voltages UK1, UK2, UK3, UK4 can be actively generated by means of the converter arms 15, 16, 43, 44.
  • FIG. 7 shows a fourth embodiment of an OF INVENTION ⁇ to the invention the DC converter 103.
  • the DC-DC converter 103 in energy exchange branch summarizes a third Konnverterarm 43 and a fourth Konverterarm 44.
  • the third and fourth Konverterarm 43 are connected at a potential point 47.
  • a further converter module 48 extends with a series connection of two-pole submodules 26.
  • a second module voltage uM2 uAC is generated. In this way, between a potential point 49, at which the two converter modules 26 and 48 are connected to each other, and the first low-side DC voltage pole 21, a DC current IDC2 flows tolerably.
  • iDCACl IDC1 / 2 + iAC.
  • Converter arm 51 and a sixth converter arm 52 which are interconnected in a potential point 53.
  • the fifth and sixth converter arms 51 and 52 are constructed similarly to the other converter arms.
  • the DC-DC converter 104 has three active phases.
  • the converter branch 14 may also be referred to as the first converter branch 14 in this context.
  • the energy exchange branch 23 can be referred to as the second converter branch 23 and the further energy exchange branch 50 as the third converter branch 50.
  • UK1 UDC1 - UDC2 - ⁇ ACa
  • UK3 UDC1 - UDC2 - ⁇ ACb
  • the DC-DC converter 104 is different from the DC-DC converter 103 by a third one
  • Converter module 53 extending between a potential point 54 between the fifth and the sixth converter arm 51 and 52 and the first undervoltage-side DC voltage 21th extends.
  • the third converter module 53 is constructed similar to the two üb ⁇ membered converter modules 25 and 48th
  • the three converter modules 25, 48, 53 are interconnected in a potential point 49.
  • the module voltages uM1, uM2 or uM3 generated at the convector modules 25, 48, 53 the following applies:
  • uM2 -uACb
  • uM3 -uACc.
  • the generated alternating voltages or alternating voltage components uACa, uACb, uACc result in a first alternatingcircuit current iACl flowing between the first and second converter branches 14 and 23, respectively, and a second alternatingcircuit current iAC2 flowing between the second and third converter branches 23 or 50 flows.
  • the direct current IDC1 flowing on the high-voltage side DC poles 12, 13 and the direct current IDC2 flowing on the low-side DC poles 20, 21 are superposed with the two alternating circulating currents iAC1, iAC2 to form superimposed currents
  • iDCACl IDC1 / 3 + iACl
  • iDCAC2 IDC1 / 3 + 2 * IDC2 / 3 + iACl;
  • iDCAC3 2 * IDC1 / 3 + iAC2;
  • iDCAC4 2 * IDC1 / 3 + IDC2 / 3 + iAC2.
  • FIG 9 shows a further embodiment of an OF INVENTION ⁇ to the invention the DC converter 105.
  • the DC clamping ⁇ voltage transformer 105 is different from the DC voltage wall ⁇ ler 104 of Figure 7 by connecting means 55 for connecting the DC-DC converter 105 with a (not shown in Figure 9) alternating voltage network.
  • the connection means 55 comprise a transformer 56 which is connectable or connected on the primary side by means of connections 57 to the AC voltage network and on the secondary side via a first phase 58 to the first converter module 25 and via a second phase 59 to the second converter module 48.
  • the first phase 58 extends between the transformer 56 and the potential point 19 between the first and the second converter arm 15 or 16.
  • the second stage 59 extends between the transformer 56 and the potential of point 47 between the third and fourth Konverterarm 43 and 44.
  • a seventh embodiment of an OF INVENTION ⁇ to the invention DC-DC converter 106 is shown.
  • the DC-DC converter 106 differs from the DC-DC converter 104 of FIG. 8 by connecting means 60 for connecting the DC-DC converter 106 to an AC voltage network (not shown in FIG. 10).
  • the connecting means 60 comprise a three-phase transformer 61, which on the primary side by means of connections 62 to the alternating ⁇ pannungsnetz and secondary side via a first phase 63 with the first converter module 25, via a second phase 64 with the second converter module 48 and a third phase 65 with the third converter module 53 connectable or connected.
  • the first phase 63 extends between the transformer 61 and the potential point 19 between the first and the second converter arm 15 or 16.
  • the second phase 64 extends between the transformer 61 and the potential point 47 between the third and the fourth
  • the third phase 65 extends between the transformer 61 and the potential point 54 between the fifth and the sixth converter arm 51 and 52, respectively.
  • the exemplary embodiments of the DC voltage converter according to the invention shown in FIGS. 2 and 5 to 10 are monopolar. In all cases, however, a bipolar variant of the DC-DC converter is possible by a corresponding expansion of the circuit.

Abstract

L'invention concerne un convertisseur continu-continu (100) qui comprend une branche de convertisseur (14), s'étendant entre des pôles de tension continue (12, 13) côté haute tension, et des premier et second bras de convertisseur (15, 16) qui sont reliés électriquement à un point de potentiel (19) qui est relié à un premier pôle de tension continue (21) côté basse tension, ledit second bras de convertisseur (16) s'étendant entre le point de potentiel situé entre les bras de convertisseur et un second pôle de tension continue (20) côté basse tension, et chacun des bras de convertisseur comportant un commutateur de puissance à semi-conducteur pouvant être enclenché et désactivé, et une branche d'échange d'énergie (14) destinée à l'échange d'énergie entre les deux bras de convertisseur qui s'étendent parallèlement à la branche de convertisseur entre les pôles de tension continue côté haute de tension. L'invention est caractérisée par un module de convertisseur (25), pourvu d'un circuit série de sous-modules bipolaires (26), qui est disposé entre le point de potentiel situé entre les deux bras de convertisseur et le premier pôle de tension continue côté basse tension, les sous-modules comportant un accumulateur d'énergie et au moins un commutateur de puissance à semi-conducteur, et pouvant être commandés de telle sorte qu'une tension de sous-module positive ou négative ou une tension de valeur nulle chute au niveau des pôles des sous-modules.
EP15707941.9A 2015-03-04 2015-03-04 Convertisseur continu-continu Ceased EP3245723A1 (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
PCT/EP2015/054483 WO2016138949A1 (fr) 2015-03-04 2015-03-04 Convertisseur continu-continu

Publications (1)

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EP3245723A1 true EP3245723A1 (fr) 2017-11-22

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EP15707941.9A Ceased EP3245723A1 (fr) 2015-03-04 2015-03-04 Convertisseur continu-continu

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EP (1) EP3245723A1 (fr)
WO (1) WO2016138949A1 (fr)

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CN109104106B (zh) * 2018-08-30 2020-06-26 中国科学院电工研究所 单相电力电子变压器的控制方法
FR3096849A1 (fr) * 2019-05-28 2020-12-04 Ecole Centrale De Lyon Convertisseur de tension DC/DC comprenant un transformateur
CN112072940B (zh) * 2020-09-08 2022-02-18 南京南瑞继保电气有限公司 有源模块化的换流链、换流器控制方法及装置、电子设备
CN113783416B (zh) * 2021-09-03 2022-08-12 广东电网有限责任公司广州供电局 直流变换器及参数计算方法、计算机设备、存储介质

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WO2013071962A1 (fr) * 2011-11-16 2013-05-23 Abb Technology Ag Convertisseur d'énergie multicellulaire ca/cc pour connexion hvdc à deux bornes
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