EP3053179A1 - Dispositif et procédé de commutation d'un courant continu - Google Patents

Dispositif et procédé de commutation d'un courant continu

Info

Publication number
EP3053179A1
EP3053179A1 EP13814053.8A EP13814053A EP3053179A1 EP 3053179 A1 EP3053179 A1 EP 3053179A1 EP 13814053 A EP13814053 A EP 13814053A EP 3053179 A1 EP3053179 A1 EP 3053179A1
Authority
EP
European Patent Office
Prior art keywords
capacitor
branch
switch
operating current
damping device
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.)
Granted
Application number
EP13814053.8A
Other languages
German (de)
English (en)
Other versions
EP3053179B1 (fr
Inventor
Dominik ERGIN
Hans-Joachim Knaak
Mojtaba Mohaddes Khorassani
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 EP3053179A1 publication Critical patent/EP3053179A1/fr
Application granted granted Critical
Publication of EP3053179B1 publication Critical patent/EP3053179B1/fr
Active legal-status Critical Current
Anticipated expiration legal-status Critical

Links

Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H9/00—Details of switching devices, not covered by groups H01H1/00 - H01H7/00
    • H01H9/54—Circuit arrangements not adapted to a particular application of the switching device and for which no provision exists elsewhere
    • H01H9/548—Electromechanical and static switch connected in series
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H33/00—High-tension or heavy-current switches with arc-extinguishing or arc-preventing means
    • H01H33/02—Details
    • H01H33/59—Circuit arrangements not adapted to a particular application of the switch and not otherwise provided for, e.g. for ensuring operation of the switch at a predetermined point in the ac cycle
    • H01H33/596—Circuit arrangements not adapted to a particular application of the switch and not otherwise provided for, e.g. for ensuring operation of the switch at a predetermined point in the ac cycle for interrupting dc

Definitions

  • the invention relates to a device for switching a direct current.
  • the device comprises an operating current branch, in which a mechanical switch is arranged, a circuit breaker connected to the operating current branch for interrupting the flow of current in the operating current branch, a capacitor branch arranged in a parallel circuit to the operating current branch, in which a capacitor is arranged, and a damping device, which is a resistance element includes.
  • Switching devices of this type are usually connected to an electrical DC voltage line or a DC voltage network and serve to interrupt the direct current carrying line in the event of a fault.
  • the mechanical switch and the circuit breaker are closed, so that the operating current flows through the operating current branch.
  • the short-circuit current is commutated to the capacitor branch, whereby the capacitor is charged. In this case, a reverse voltage is built, whereby the device is de-energized.
  • the damping device according to WO 2013/093066 A1 is arranged in parallel to the operating current branch and provided for enabling a re-connection of the device after a shutdown in the event of an error within a short time.
  • the switching element In the known device is in a series circuit to the damping device, a further switching element. After a fault, the switching element can be closed with the circuit breaker open and the mechanical switch open, so that the capacitor can discharge via the damping device. This way is a fast one Restart the device allows.
  • the same voltage dimensioning is necessary in the known device for the additional switching element, as for the circuit breaker, which should switch the current in the operating current branch. This leads to increased costs of the additional switching element.
  • the object of the present invention is therefore to propose a device of the type mentioned, which is inexpensive.
  • the damping device is arranged in the capacitor branch in a series circuit to the capacitor or in the operating current branch in a series circuit to the mechanical switch, wherein the damping device can be bridged by means arranged in a parallel circuit to the damping device bridging switch.
  • the bypass switch is closed in normal operation. If an error occurs, the capacitor in the capacitor branch can be charged until the current drops to zero due to the counter-voltage built up.
  • bypass switch can be opened so that the capacitor can discharge via the damping device as soon as the mechanical switch is closed again.
  • the device according to the invention has the advantage that the dimensioning of the dielectric strength of the bypass switch can be reduced. Because after charging the capacitor and opening the circuit breaker, the entire capacitor voltage drops only transiently at the bypass switch alone. In this way, the overall cost of the device can be reduced, since the bypass switch does not have to be designed for a continuous voltage higher than the maximum capacitor voltage, but only for an impulse load during the discharging process.
  • the resistance element of the damping device must be configured according to the energy optionally stored in the capacitor. Since an inductance can be assigned to each resistance element in addition to a resistance value, these two values must fulfill predetermined requirements for the desired time interval between the disconnection and the restarting.
  • the resistance element has an electrical resistance and an inductance whose values allow a discharge of the fully charged capacitor via the damping device within a period of 50 ms to 500 ms, particularly preferably 100 ms to 250 ms.
  • the damping device comprises a separate coil element.
  • the coil element forms a parallel circuit with the resistance element.
  • the damping device formed in this way limits the peak value of the discharge current and absorbs the energy stored in the capacitor particularly effectively.
  • the device further comprises a varistor, for example a metal oxide varistor, which is connected in a parallel circuit to the capacitor and to the operating current branch.
  • a limiting voltage can be defined, which can be maximally established when charging the capacitor.
  • the varistor must be designed such that the limiting voltage is greater than a mains voltage of the DC voltage network to which the device is connected.
  • the device further comprises a power semiconductor switch which is connected in series with the mechanical switch in the is arranged operating branch.
  • the current in the operating current branch initially rises approximately linearly.
  • the power semiconductor switch is set up to switch off in such a case with the smallest possible time delay, preferably in the microsecond range, whereby the further rising current is commutated into the capacitor branch.
  • the opening of the mechanical switch is set in motion. The mechanical switch is then opened, so that the power semiconductor switch is not damaged by the high applied voltage (up to several hundred kilovolts).
  • the device may be designed as a unidirectional or bidirectional switch.
  • the use of the power electronic switch also results in advantageous that the mechanical switch can be opened without current (whereby arc generation can be avoided), and that the mechanical switch does not have to provide the necessary commutation voltage.
  • the capacitor arranged in the capacitor branch preferably has a capacitance value which lies between 25 ⁇ and 200 ⁇ .
  • the bypass switch is a mechanical circuit breaker.
  • the mechanical disconnector uses, for example, an electromagnetic force to open and close its contacts.
  • the bypass switch is a circuit breaker, for example, a conventional AC voltage switch.
  • the bridging switch can always be switched in a currentless state of the device.
  • the requirements for the switching time of the bypass switch are therefore in the usual range of AC technology, preferably in the range of less than 100 ms.
  • the bypass switch in the operating current branch ange- is arranged to pre-charge by means of the device, for example, a cable, for example, a cable on the device, via the damping device.
  • the bypass switch is opened before the line is connected by means of the circuit breaker. Any charge current thus flows through the attenuator, thereby reducing a peak and load on all components in the network.
  • the bypass switch can be closed and normal operation can be started.
  • bypass switch is arranged in the operating current branch, then a further advantage of the device can be seen in the fact that, in the event of a fault, a fault current is to be commutated from the operating current branch to the capacitor branch, if necessary immediately the mechanical switch and the bypass switch can be opened immediately.
  • the invention relates to a method for switching the direct current by means of the device according to the species.
  • the object of the invention is to propose an alternative method for switching the direct current by means of the device according to the species.
  • the object is achieved by the method in which the bypass switch is opened in the event of a fault after opening the circuit breaker and the capacitor is discharged via the operating current branch and the damping device.
  • the bypass switch is closed only after discharging the capacitor and after closing the circuit breaker. sen. If the bypass switch is arranged in the operating current branch, then the current flows after the device is switched on by closing the circuit breaker first for a limited time via the damping device. As a result, the current peak value and thus the load of a device connected downstream of the device can be reduced. For normal operation, the bypass switch is closed again after a predetermined time.
  • FIG. 1 shows a schematic representation of a first exemplary embodiment of a device according to the invention
  • Figure 2 shows a second embodiment of the device according to the invention in a schematic view.
  • Figure 1 shows a first embodiment of the device 1 according to the invention for switching a direct current.
  • the device 1 has two terminals 141, 142, by means of which the device 1 is connected to a DC voltage network.
  • the current direction is indicated by the arrow 13.
  • the device 1 comprises an operating current branch 2 and a capacitor branch 5, the capacitor branch 5 being connected in parallel to the operating current branch 2.
  • the device 1 has a varistor branch 15, wherein the varistor branch 15 is arranged in a parallel connection to the capacitor branch 5 and to the operating current branch 2.
  • a mechanical switch 3 and a power semiconductor switch 12 are arranged, wherein the mechanical switch 3 and the power semiconductor switch 12 are connected in a series circuit.
  • a capacitor 6 is arranged.
  • a metal oxide varistor 11 is arranged in the varistor branch 15, a metal oxide varistor 11 is arranged.
  • the device 1 further comprises a damping device 7, which is arranged in a series circuit to the mechanical switch 3.
  • a bypass switch 9 is arranged, by means of which the damping device can be bridged.
  • the damping device 7 comprises a coil element 10 and a resistance element 8, the coil element 10 and the resistance element 8 being arranged in a parallel connection to one another.
  • the mechanical switch 3 and the bypass switch 9 are designed as mechanical disconnectors.
  • the power semiconductor switch 12 is designed such that the device 1 can be used as a bidirectional switch.
  • the device 1 further comprises a circuit breaker 4, which is adapted to interrupt the flow of current in the operating current branch 2.
  • a load current flows through the circuit breaker 4, the mechanical switch 3, the half-circuit breaker 12 and the bypass switch 9 in the operating current branch 2.
  • an error occurs in the operating current branch 2 to a corresponding increase in current.
  • the mechanical switch 3 and the power semiconductor switch 12 controls a control unit, not shown in Figure 1, the mechanical switch 3 and the power semiconductor switch 12 to turn off.
  • the power semiconductor switch 12 is therefore locked and the mechanical switch 3 is opened.
  • the current from the operating current branch is commutated to the capacitor branch 5.
  • the circuit breaker 4 is also opened, initially the current continues to flow through the capacitor branch.
  • the capacitor 6 is charged until a voltage across the capacitor 6 drops, which is greater than the mains voltage.
  • the maximum voltage to which the capacitor 6 is charged is defined by the dissipating varistor 11. ned. The current flowing through the device 1 is thereby forced to zero, thus extinguishing a possible arc in the circuit breaker 4. After such a shutdown of the device 1, the capacitor 6 is charged to about twice the nominal voltage. If now the device 1 is switched on again within a short time, the energy stored in the capacitor must first be released.
  • the bypass switch 9 can be opened. If the switch-off operation of the device 1 is terminated by the extinguishing of the arc in the protection switch 4, then the switches 3, 12 can be closed again. About the mechanical switch 3, which is now closed, the power semiconductor switch 12, the
  • Damping device 7 the capacitor 6 now closes a circuit through which the capacitor 6 can be discharged.
  • the coil element 10 and the resistance element 8 of the damping device 7 thereby ensure a limitation of the peak value of the discharge current and for absorption of the stored energy of the capacitor 6.
  • the bypass switch 9 can be closed again. The circuit is thus ready for the renewed connection of the device 1.
  • FIG. 2 shows a second embodiment of the device 1 according to the invention is shown schematically.
  • Identical elements in FIGS. 1 and 2 are each provided with the same reference numerals. In order to avoid repetition, therefore, in the following description of FIG. 2, only those elements are discussed which distinguish the embodiment of FIG. 2 from the exemplary embodiment of FIG.
  • the damping device 7 is arranged in a series Circuit arranged to the capacitor 6 in the capacitor branch 5.
  • the bypass switch 9 is connected in a parallel circuit to the damping device 7, wherein the damping device 7 can be bridged by means of the bypass switch 9.
  • the mode of operation of the device 1 according to FIG. 2 substantially corresponds to the mode of operation of the device 1 of FIG. 1.
  • the current flowing through the device 1 is thereby forced to zero, which extinguishes a possible arc in the protection switch 4.
  • the capacitor 6 is charged to about twice the nominal voltage. If now the device 1 is switched on again within a short time, the energy stored in the capacitor must first be released.
  • the bypass switch 9 can be opened. Furthermore, the switches 3, 12 can be closed again. About the mechanical Switch 3, the power semiconductor switch 12, the damping device 7 and the capacitor 6 now closes a circuit through which the capacitor 6 can be discharged. The coil element 10 and the resistance element 8 of the damping device 7 thereby ensure a limitation of the peak value of the discharge current and for absorption of the stored energy of the capacitor 6. As soon as the capacitor 6 is discharged, the bypass switch 9 can be closed again. The circuit is thus ready for the renewed connection of the device 1. The connection of the

Landscapes

  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Driving Mechanisms And Operating Circuits Of Arc-Extinguishing High-Tension Switches (AREA)
  • Keying Circuit Devices (AREA)

Abstract

L'invention concerne un dispositif (1) de commutation d'un courant continu. Le dispositif comprend une branche de courant de fonctionnement (2), dans laquelle est disposé un commutateur mécanique (3), un commutateur de protection relié à la branche de courant de fonctionnement (4) et servant à interrompre la circulation du courant dans la branche de courant fonctionnement, une branche à condensateur (5) qui est disposée en parallèle avec la branche de courant de fonctionnement et dans laquelle est disposé un condensateur, ainsi qu'un dispositif d'amortissement (7) comprenant un élément résistif (8). L'invention est caractérisée en ce que le dispositif d'amortissement (7) est disposé dans la branche à condensateur (5) en série avec le condensateur (6) ou dans la branche de courant de fonctionnement (2) en série avec le commutateur mécanique (3), le dispositif d'amortissement (7) pouvant être ponté au moyen d'un commutateur de pontage (9) disposé en parallèle avec le dispositif d'amortissement (7). L'invention concerne en outre un procédé de commutation du courant continu utilisant le dispositif de l'invention.
EP13814053.8A 2013-11-29 2013-11-29 Dispositif et procédé de commutation d'un courant continu Active EP3053179B1 (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
PCT/EP2013/075144 WO2015078525A1 (fr) 2013-11-29 2013-11-29 Dispositif et procédé de commutation d'un courant continu

Publications (2)

Publication Number Publication Date
EP3053179A1 true EP3053179A1 (fr) 2016-08-10
EP3053179B1 EP3053179B1 (fr) 2017-10-18

Family

ID=49883057

Family Applications (1)

Application Number Title Priority Date Filing Date
EP13814053.8A Active EP3053179B1 (fr) 2013-11-29 2013-11-29 Dispositif et procédé de commutation d'un courant continu

Country Status (4)

Country Link
US (1) US9875861B2 (fr)
EP (1) EP3053179B1 (fr)
CN (1) CN105745730B (fr)
WO (1) WO2015078525A1 (fr)

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GB2540813A (en) * 2015-07-30 2017-02-01 General Electric Technology Gmbh Electrical assembly
KR102558677B1 (ko) 2016-04-04 2023-07-21 엘에스일렉트릭(주) 전류 차단기
DE102016212915A1 (de) 2016-07-14 2018-01-18 Siemens Aktiengesellschaft Schaltanordnung sowie Verfahren zur Fehlerklärung
CN106099878B (zh) * 2016-08-04 2019-01-29 华中科技大学 一种电容充电型双向直流断路器及其应用
GB2557348B (en) * 2016-12-08 2020-09-30 Ge Aviat Systems Ltd Power distribution system including a commutation device
EP3373317A1 (fr) * 2017-03-06 2018-09-12 General Electric Technology GmbH Procédé de fermeture d'un disjoncteur mécatronique
KR102361377B1 (ko) 2017-06-27 2022-02-10 캐논 아네르바 가부시키가이샤 플라스마 처리 장치
EP3429046A1 (fr) * 2017-07-14 2019-01-16 Siemens Aktiengesellschaft Connecteur électronique ayant un limiteur contre les surtensions
GB201809140D0 (en) 2018-06-04 2018-07-18 Univ Court Of The Univ Of Aberdeen Apparatus suitable for interrupting a direct current
DE102018213354A1 (de) * 2018-08-08 2020-02-13 Siemens Aktiengesellschaft Schaltgerät und Verfahren
EP3654477A1 (fr) * 2018-11-15 2020-05-20 Siemens Aktiengesellschaft Commutateur électronique à protection contre les surtensions
FR3091408B1 (fr) 2018-12-27 2021-01-15 Inst Supergrid Dispositif de coupure de courant pour courant continu haute tension avec circuit d’oscillation adaptatif et procédé de pilotage
FR3091407B1 (fr) 2018-12-27 2021-10-29 Inst Supergrid Dispositif de coupure de courant pour courant continu haute tension avec circuit capacitif tampon et procédé de pilotage
CN109861183B (zh) * 2019-01-18 2020-08-18 华南理工大学 一种直流断路器及其使用方法
FR3094136B1 (fr) 2019-03-22 2021-04-02 Inst Supergrid Dispositif de coupure de courant pour courant continu haute tension avec résonateur et commutation
EP3869650B1 (fr) * 2020-02-21 2023-11-01 General Electric Technology GmbH Dispositif d'interruption de circuit
CN115834288B (zh) * 2022-12-07 2024-05-03 湖南中联重科履带起重机有限公司 用于总线网络的控制方法、控制装置、存储介质及处理器

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US8717716B2 (en) 2009-11-16 2014-05-06 Abb Technology Ag Device and method to break the current of a power transmission or distribution line and current limiting arrangement
WO2011141055A1 (fr) 2010-05-11 2011-11-17 Abb Technology Ag Appareil disjoncteur pour courant continu sous haute tension
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EP2469552B1 (fr) 2010-12-23 2014-02-26 ABB Technology AG Procédé, disjoncteur et unité de commutation pour couper des courants CC haute tension
EP2777059B1 (fr) * 2011-12-22 2022-02-02 Siemens Energy Global GmbH & Co. KG Disjoncteur hybride pour courant continu
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Also Published As

Publication number Publication date
CN105745730B (zh) 2018-11-02
EP3053179B1 (fr) 2017-10-18
US9875861B2 (en) 2018-01-23
CN105745730A (zh) 2016-07-06
US20160300671A1 (en) 2016-10-13
WO2015078525A1 (fr) 2015-06-04

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