WO2014090316A1 - Dispositif de commutation d'un réseau de tension continue - Google Patents

Dispositif de commutation d'un réseau de tension continue Download PDF

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Publication number
WO2014090316A1
WO2014090316A1 PCT/EP2012/075441 EP2012075441W WO2014090316A1 WO 2014090316 A1 WO2014090316 A1 WO 2014090316A1 EP 2012075441 W EP2012075441 W EP 2012075441W WO 2014090316 A1 WO2014090316 A1 WO 2014090316A1
Authority
WO
WIPO (PCT)
Prior art keywords
switch
voltage
switches
load
arrangement
Prior art date
Application number
PCT/EP2012/075441
Other languages
German (de)
English (en)
Inventor
Dominik ERGIN
Hans-Joachim Knaak
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 EP12812197.7A priority Critical patent/EP2907209A1/fr
Priority to PCT/EP2012/075441 priority patent/WO2014090316A1/fr
Publication of WO2014090316A1 publication Critical patent/WO2014090316A1/fr

Links

Classifications

    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02H—EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
    • H02H7/00—Emergency protective circuit arrangements specially adapted for specific types of electric machines or apparatus or for sectionalised protection of cable or line systems, and effecting automatic switching in the event of an undesired change from normal working conditions
    • H02H7/26—Sectionalised protection of cable or line systems, e.g. for disconnecting a section on which a short-circuit, earth fault, or arc discharge has occured
    • H02H7/268—Sectionalised protection of cable or line systems, e.g. for disconnecting a section on which a short-circuit, earth fault, or arc discharge has occured for dc systems

Definitions

  • the invention relates to a switch arrangement of a DC voltage network with a plurality of DC switches, which are each arranged in different branches of the DC voltage network and set up in the event of an error to disconnect the faulty branch of the DC voltage network, wherein one of the DC voltage switch is a DC voltage circuit breaker, the fast Switching off high fault currents is set up.
  • Such a switch arrangement is already known from WO 2012/001123 AI.
  • the switch arrangement described there is provided for switching currents in a DC voltage network having different branches.
  • fast and slow switches are used in combination.
  • slow switches have the disadvantage that relatively much time passes until the energy flow is restored.
  • the object of the invention is therefore to provide a switch assembly of the type mentioned, in which the energy flow can be restored quickly and at the same time remains inexpensive.
  • the invention solves this problem in that at least a second DC voltage switch is a DC load switch, which is set up for rapid shutdown of rated currents that are smaller than the fault currents.
  • the invention solves this problem in that at least a second DC voltage switch is a DC load switch, which is set up for rapid shutdown of rated currents.
  • a second DC voltage switch is a DC load switch, which is set up for rapid shutdown of rated currents.
  • the entire switch arrangement has at least one switch which both switches quickly and is set up to switch high fault currents.
  • Such fault currents are at least twice as large as the nominal currents occurring during normal operation of the network, which are also referred to here synonymously as load currents.
  • At least one other DC voltage switch is designed as a DC load switch and only set up to switch off the rated currents.
  • the switching off of rated currents also takes place in the context of the invention by a fast switch whose Abschalt- or blocking capability is limited to rated currents and voltages and is thus designed much cheaper than a DC circuit breaker.
  • the fast switch whose Abschalt- or blocking capability is limited to rated currents and voltages and is thus designed much cheaper than a DC circuit breaker.
  • DC load switch a pure disconnect switch, which can be switched almost de-energized.
  • the DC load circuit breaker is also set up, if required, for switching off DC currents, although it has to build up only a small countervoltage in comparison to the DC voltage circuit breaker. This is in the order of magnitude smaller than the rated voltage of the DC voltage network. However, the DC load switch is able to isolate the full rated voltage of the DC network after the shutdown.
  • the switch arrangement according to the invention is arranged in different branches of a DC voltage network.
  • the DC circuit breaker or the DC circuit breakers take over the switching off of high fault currents, for example in the event of a short circuit.
  • the or the DC voltage switch can be transferred quickly and preferably without current to its disconnected position. After switching off the faulty branch, the power transmission can be quickly resumed by switching on the appropriate fast switch (s) again.
  • the DC load switch is a fast mechanical switch.
  • Fast mechanical switches are able to bring about a sufficiently large separation distance between the contacts of the contact arrangement quickly, for example, faster than 15 ms, in particular faster than 5 ms, so that a sufficiently high dielectric strength is provided within the stated period of time.
  • the first fast mechanical switches with such a switching speed are already available on the market.
  • the fast mechanical switch is expediently arranged in series with power semiconductor switches whose blocking capability is sufficient for switching off currents which are smaller than the rated current.
  • the DC load circuit breaker is designed as a series circuit of fast mechanical switches and fast power semiconductor switch.
  • DC circuit breaker on both a fast mechanical switch and a power semiconductor switch unit with a blocking capability that allows switching off high fault currents at rated voltage.
  • a DC circuit breaker has been described which includes a main current path with a mechanical switch and power switch a power electronic auxiliary switch in series thereto.
  • the main current path is bridged by a Abschaltstrom path, in which a power semiconductor switching unit is arranged, which is set up for switching off even high short-circuit currents.
  • the shutdown current path has a larger ohmic resistance during normal operation than the main current path. Therefore, in normal operation, the operating current flows through the main current path without large losses.
  • the mechanical switch in the main current path is naturally closed during normal operation.
  • the auxiliary current switch is first transferred to its blocking position and at the same time the mechanical switch is opened, so that the current is commutated into the switch-off current path and switched off there by the power semiconductor circuit unit as soon as the mechanical switch has reached a sufficiently high dielectric strength.
  • the DC voltage circuit breaker is designed as a unidirectional switch.
  • a further cost advantage is achieved, since the power semiconductor complexity is less complicated compared to a bidirectional switch.
  • the DC voltage power switch is integrated in a converter which is connected via a branch of the DC voltage network with the DC load switch or switches.
  • the converter itself is able to block high fault currents.
  • a converter is, for example, a so-called modular multilevel or multistage converter with a series circuit breaker. two-pole submodules, which form a full bridge circuit.
  • Such a modular multi-stage converter is capable of suppressing fault currents in both directions, so that subsequently the DC load switches arranged downstream in the direction of current flow can be opened almost without current.
  • At least one busbar is provided, wherein the DC voltage power switch is connected to the busbar via one of the branches and the DC load switch is arranged between the second branch and the busbar.
  • Such switch arrangements with a busbar are preferably used in the field of energy transmission.
  • the switch assembly according to the invention also allows for such requirements a considerable cost savings due to a reduced power semiconductor expenses.
  • At least one of the branches of the DC voltage network connects a converter station with one of the busbars.
  • the DC load switch has a switching speed of less than 15 ms. It is particularly advantageous if the fast DC load switch and the fast DC voltage circuit breaker have a switching time of less than 5 ms.
  • FIG. 2 shows another embodiment of the inventions
  • FIG. 3 shows a further exemplary embodiment of the invention
  • Figure 1 shows a first embodiment of the switch assembly 1 according to the invention, which shows a total of six switches in a so-called one and a half-switch arrangement in the embodiment shown.
  • the said switch arrangement has a first busbar 2 and a second busbar 3, which are connected to one another via a first connection branch 4 and a second connection branch 5.
  • first connection branch 4 and 5 respectively three switches are arranged.
  • the switches 6, 7 and 8 are provided in the second connection branch 5, the switches 9, 10 and 11 can be seen.
  • the potential point between the switches 6 and 7 is with a first branch 12, the potential point between the switches 7 and 8 with a second branch 13, the potential point between the switches 9 and 10 with a third branch 14 and the potential point between the switches 10 and 11 connected to a fourth branch 15.
  • the branches 12, 13, 14 and 15 are part of a DC voltage network, which is, for example, a meshed DC voltage network.
  • the DC voltage switches 6, 7, 8, 9, 10 and 11 are designed differently.
  • the switches 7 and 8 are so-called DC voltage power switches
  • the switches 6, 9, 10 and 11 are designed as DC load switches.
  • the DC power switches 7, 8 are marked in Figure 1 with an outer square box. They are able to turn on and off not only the rated current, or in other words the load current.
  • DC voltage switch 7 and 8 are DC voltage switch 7 and 8 also able to switch high fault currents at the rated voltage.
  • they have a power switching unit based on power semiconductor switches, which is able to absorb both the voltage occurring during switching and to reduce the energy stored in the network and released during switching.
  • Such DC voltage circuit breakers have already been described in the literature. They have, for example, a series connection of switched on and off power semiconductor switches, each of which a freewheeling diode is connected in parallel. The turn-off or blocking capability of the respective power semiconductor switches 7 and 8 is dependent on the number of power semiconductor switches in their series connection. The more power semiconductor switches that can be switched on and off, such as IGBTs, IGCTs,
  • GTOs or the like connected in series, the greater the blocking capability of the DC power switch.
  • a single power semiconductor switch currently has a blocking capability of 2 to 5 kV. With the usual voltages in the field of energy transmission, hundreds of power semiconductor switches have to be connected in series. To reduce the energy released during switching, for example, surge conductors are expedient, which are connected in parallel to the power semiconductor switches. Of course, so-called capacitors can also be used here.
  • a branch 12, 13, 14 or 15 is illustrated only by a line. It should be noted, however, that each of the branches, as well as each connection branch and each busbar, may be two poles of opposite polarity. For the sake of clarity, however, a double-line representation was omitted.
  • the network configuration is such that a short circuit can occur only in the second branch 13.
  • This branch for example, represents an open-air cable that extends over hundreds of kilometers, so that lightning strikes can provide a high current flow in a short time. For this reason, it is possible with the help of DC power switches 7 and 8, the second branch 13 to be separated quickly from the busbars 2 and 3. Here, the switches 6, 9, 10 and 11 are also transferred to their disconnected position.
  • the DC load switches are also fast switches. However, these are not able to switch off high fault currents of just beschrienen type. However, this is not necessary because of the network configuration, as this is taken over by DC power switches 7 and 8. However, DC load switches 6, 9, 10 and 11 can be quickly turned on again due to their fast response or switching duration, so that branches 12, 14 and 15 are separated from one another for only a few milliseconds. Of course, this also applies to the DC power switches 7, 8 and the pointer 13. Subsequently, however, the power transmission via the branches 12, 14 and 15 and possibly also 13 can be resumed. This rapid reconnection thus allows the rapid restoration of the energy flow, so that there are no significant power failures and no costly restarting of converters or the like.
  • the DC load switches 6, 9, 10 and 11 are fast mechanical switches, with a switching time of less than 15 ms.
  • FIG. 2 shows a further embodiment of the invention, which differs from the embodiment shown in Figure 1 in that in the branch 14, an inverter 16 is arranged, the ter via a Gleichwoods antiquesmal- 17 with the busbars 2 and 3 and thus with the others DC switches 6, 7, 8, 9, 10 and 11 of
  • Switching arrangement 1 is connected.
  • the entire circuit arrangement 1 thus comprises a total of 7 switches according to the embodiment shown in FIG.
  • the arranged between the busbars 2 and 3 switches of the illustrated one and a half arrangement are all formed as a DC circuit breaker 6, 7, 8, 9, 10, 11.
  • Only the DC voltage switch 17 is a DC power switch. He alone is able to switch off high fault currents.
  • the DC load switches arranged downstream of this in the power flow direction of the converter 16 have either no or very low switch-off capability, since only small currents which are smaller than the rated current must be switched.
  • FIG 3 shows another embodiment of the invention, wherein between the busbars 2 and 3, three connecting branches 4, 5 and 18 are provided.
  • the connection branches 4, 5 and 18 only two switches, namely two DC load circuit breakers 6, 9, 10 and 11, are arranged, whereas the switches 7 and 8 are again DC voltage circuit breakers. They are used to switch off high fault currents, for example in the event of a short circuit.

Landscapes

  • Driving Mechanisms And Operating Circuits Of Arc-Extinguishing High-Tension Switches (AREA)

Abstract

L'invention concerne un dispositif de commutation (1) d'un réseau de tension continue présentant plusieurs commutateurs de tension continue, qui sont chacun disposés dans des branches différentes (12, 13, 14, 15) du réseau de tension continue et conçus pour couper, en cas de défaut, la branche en défaut (12, 13, 14, 15) du réseau de tension continue, un des commutateurs de tension continue étant un disjoncteur (7, 8, 17) de tension continue qui est conçu pour arrêter rapidement les courants de défaut, qui permet de réinstaurer rapidement le courant énergétique et qui est simultanément peu onéreux. Selon l'invention, au moins un deuxième commutateur de tension continue est un disjoncteur (6, 9, 10, 11) de tension continue qui est conçu pour arrêter rapidement des courants nominaux qui sont plus petits que les courants de défaut.
PCT/EP2012/075441 2012-12-13 2012-12-13 Dispositif de commutation d'un réseau de tension continue WO2014090316A1 (fr)

Priority Applications (2)

Application Number Priority Date Filing Date Title
EP12812197.7A EP2907209A1 (fr) 2012-12-13 2012-12-13 Dispositif de commutation d'un réseau de tension continue
PCT/EP2012/075441 WO2014090316A1 (fr) 2012-12-13 2012-12-13 Dispositif de commutation d'un réseau de tension continue

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
PCT/EP2012/075441 WO2014090316A1 (fr) 2012-12-13 2012-12-13 Dispositif de commutation d'un réseau de tension continue

Publications (1)

Publication Number Publication Date
WO2014090316A1 true WO2014090316A1 (fr) 2014-06-19

Family

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Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/EP2012/075441 WO2014090316A1 (fr) 2012-12-13 2012-12-13 Dispositif de commutation d'un réseau de tension continue

Country Status (2)

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EP (1) EP2907209A1 (fr)
WO (1) WO2014090316A1 (fr)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2016119875A1 (fr) * 2015-01-30 2016-08-04 Abb Technology Ltd Poste extérieur évolutif pour interconnecter des réseaux de distribution d'énergie en courant continu
US10608427B2 (en) 2016-11-10 2020-03-31 Abb Schweiz Ag DC power system segregated into different protection zones
DE102020212305A1 (de) 2020-09-30 2022-03-31 Siemens Energy Global GmbH & Co. KG Hochspannungs-Gleichstrom-Schaltanlage und deren Verwendung sowie Verfahren zum Schalten von Gleichspannungen

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2011141053A1 (fr) * 2010-05-11 2011-11-17 Abb Technology Ag Poste de commutation extérieur pour courant continu haute tension à commutateurs à semi-conducteurs
WO2011157305A1 (fr) * 2010-06-14 2011-12-22 Abb Research Ltd Protection contre les défaillances de lignes de transmission ccht
WO2012001123A1 (fr) 2010-06-30 2012-01-05 Abb Technology Ag Poste de commutation pour courant continu à haute tension et système de poste de commutation pour courant continu à haute tension
WO2012123014A2 (fr) * 2011-03-11 2012-09-20 Abb Technology Ag Système limiteur de courant conçu pour limiter les effets d'une défaillance dans une grille à courant continu et procédé pour faire fonctionner un système limiteur de courant
WO2012123015A1 (fr) * 2011-03-11 2012-09-20 Abb Technology Ag Grille à courant continu et procédé pour limiter les effets d'une défaillance dans une grille à courant continu

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2011141053A1 (fr) * 2010-05-11 2011-11-17 Abb Technology Ag Poste de commutation extérieur pour courant continu haute tension à commutateurs à semi-conducteurs
WO2011157305A1 (fr) * 2010-06-14 2011-12-22 Abb Research Ltd Protection contre les défaillances de lignes de transmission ccht
WO2012001123A1 (fr) 2010-06-30 2012-01-05 Abb Technology Ag Poste de commutation pour courant continu à haute tension et système de poste de commutation pour courant continu à haute tension
WO2012123014A2 (fr) * 2011-03-11 2012-09-20 Abb Technology Ag Système limiteur de courant conçu pour limiter les effets d'une défaillance dans une grille à courant continu et procédé pour faire fonctionner un système limiteur de courant
WO2012123015A1 (fr) * 2011-03-11 2012-09-20 Abb Technology Ag Grille à courant continu et procédé pour limiter les effets d'une défaillance dans une grille à courant continu

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
LIANXIANG TANG ET AL: "Locating and Isolating DC Faults in Multi-Terminal DC Systems", IEEE TRANSACTIONS ON POWER DELIVERY, IEEE SERVICE CENTER, NEW YORK, NY, US, vol. 10, no. 3, 1 July 2007 (2007-07-01), pages 1877 - 1884, XP011186629, ISSN: 0885-8977 *

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2016119875A1 (fr) * 2015-01-30 2016-08-04 Abb Technology Ltd Poste extérieur évolutif pour interconnecter des réseaux de distribution d'énergie en courant continu
US10122163B2 (en) 2015-01-30 2018-11-06 Abb Schweiz Ag Scalable switchyard for interconnecting direct current power networks
US10608427B2 (en) 2016-11-10 2020-03-31 Abb Schweiz Ag DC power system segregated into different protection zones
DE102020212305A1 (de) 2020-09-30 2022-03-31 Siemens Energy Global GmbH & Co. KG Hochspannungs-Gleichstrom-Schaltanlage und deren Verwendung sowie Verfahren zum Schalten von Gleichspannungen
DE102020212305B4 (de) 2020-09-30 2022-05-05 Siemens Energy Global GmbH & Co. KG Hochspannungs-Gleichstrom-Schaltanlage und deren Verwendung sowie Verfahren zum Schalten von Gleichspannungen

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Publication number Publication date
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