EP3032561B1 - Elektrische Schalteranordnung - Google Patents

Elektrische Schalteranordnung Download PDF

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Publication number
EP3032561B1
EP3032561B1 EP14290372.3A EP14290372A EP3032561B1 EP 3032561 B1 EP3032561 B1 EP 3032561B1 EP 14290372 A EP14290372 A EP 14290372A EP 3032561 B1 EP3032561 B1 EP 3032561B1
Authority
EP
European Patent Office
Prior art keywords
enclosure
opening
valve
pressure
switching section
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.)
Not-in-force
Application number
EP14290372.3A
Other languages
English (en)
French (fr)
Other versions
EP3032561A1 (de
Inventor
Eric Durhône
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
Priority to EP14290372.3A priority Critical patent/EP3032561B1/de
Publication of EP3032561A1 publication Critical patent/EP3032561A1/de
Application granted granted Critical
Publication of EP3032561B1 publication Critical patent/EP3032561B1/de
Not-in-force legal-status Critical Current
Anticipated expiration legal-status Critical

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Classifications

    • 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
    • H01H33/70—Switches with separate means for directing, obtaining, or increasing flow of arc-extinguishing fluid
    • H01H33/88—Switches with separate means for directing, obtaining, or increasing flow of arc-extinguishing fluid the flow of arc-extinguishing fluid being produced or increased by movement of pistons or other pressure-producing parts
    • H01H33/90—Switches with separate means for directing, obtaining, or increasing flow of arc-extinguishing fluid the flow of arc-extinguishing fluid being produced or increased by movement of pistons or other pressure-producing parts this movement being effected by or in conjunction with the contact-operating mechanism
    • 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
    • H01H33/70—Switches with separate means for directing, obtaining, or increasing flow of arc-extinguishing fluid
    • H01H33/88—Switches with separate means for directing, obtaining, or increasing flow of arc-extinguishing fluid the flow of arc-extinguishing fluid being produced or increased by movement of pistons or other pressure-producing parts
    • H01H33/90—Switches with separate means for directing, obtaining, or increasing flow of arc-extinguishing fluid the flow of arc-extinguishing fluid being produced or increased by movement of pistons or other pressure-producing parts this movement being effected by or in conjunction with the contact-operating mechanism
    • H01H33/901—Switches with separate means for directing, obtaining, or increasing flow of arc-extinguishing fluid the flow of arc-extinguishing fluid being produced or increased by movement of pistons or other pressure-producing parts this movement being effected by or in conjunction with the contact-operating mechanism making use of the energy of the arc or an auxiliary arc
    • H01H2033/902—Switches with separate means for directing, obtaining, or increasing flow of arc-extinguishing fluid the flow of arc-extinguishing fluid being produced or increased by movement of pistons or other pressure-producing parts this movement being effected by or in conjunction with the contact-operating mechanism making use of the energy of the arc or an auxiliary arc with the gases from hot space and compression volume following different paths to arc space or nozzle, i.e. the compressed gases do not pass through hot volume
    • 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
    • H01H33/70—Switches with separate means for directing, obtaining, or increasing flow of arc-extinguishing fluid
    • H01H33/88—Switches with separate means for directing, obtaining, or increasing flow of arc-extinguishing fluid the flow of arc-extinguishing fluid being produced or increased by movement of pistons or other pressure-producing parts
    • H01H33/90—Switches with separate means for directing, obtaining, or increasing flow of arc-extinguishing fluid the flow of arc-extinguishing fluid being produced or increased by movement of pistons or other pressure-producing parts this movement being effected by or in conjunction with the contact-operating mechanism
    • H01H2033/908—Switches with separate means for directing, obtaining, or increasing flow of arc-extinguishing fluid the flow of arc-extinguishing fluid being produced or increased by movement of pistons or other pressure-producing parts this movement being effected by or in conjunction with the contact-operating mechanism using valves for regulating communication between, e.g. arc space, hot volume, compression volume, surrounding volume
    • 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
    • H01H33/70—Switches with separate means for directing, obtaining, or increasing flow of arc-extinguishing fluid
    • H01H33/7015—Switches with separate means for directing, obtaining, or increasing flow of arc-extinguishing fluid characterised by flow directing elements associated with contacts
    • H01H33/7023—Switches with separate means for directing, obtaining, or increasing flow of arc-extinguishing fluid characterised by flow directing elements associated with contacts characterised by an insulating tubular gas flow enhancing nozzle
    • 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
    • H01H33/70—Switches with separate means for directing, obtaining, or increasing flow of arc-extinguishing fluid
    • H01H33/88—Switches with separate means for directing, obtaining, or increasing flow of arc-extinguishing fluid the flow of arc-extinguishing fluid being produced or increased by movement of pistons or other pressure-producing parts
    • H01H33/90—Switches with separate means for directing, obtaining, or increasing flow of arc-extinguishing fluid the flow of arc-extinguishing fluid being produced or increased by movement of pistons or other pressure-producing parts this movement being effected by or in conjunction with the contact-operating mechanism
    • H01H33/901—Switches with separate means for directing, obtaining, or increasing flow of arc-extinguishing fluid the flow of arc-extinguishing fluid being produced or increased by movement of pistons or other pressure-producing parts this movement being effected by or in conjunction with the contact-operating mechanism making use of the energy of the arc or an auxiliary arc

Definitions

  • the present invention relates to an electrical switch arrangement according to the preamble of claim 1.
  • Such electrical switch arrangements are also known as circuit breakers in the non-restrictive field of high voltage. Principally, the breaking of an alternating current by such a high voltage circuit breaker is obtained by separating electrical contact elements ideally disposed in a metal casing comprising a gas (SF6 or gas mixture) or in an insulating medium such as vacuum. .
  • Such electrical contact elements may also be arranged not in a metal casing (it is then a circuit breaker of Metal Under-Covered Substation or PSEM, in English “Gas-Insulated Switchgear or GIS", or “dead- tank "), but in an insulating envelope (it is then an AIS circuit breaker, in English” Air-Insulated Switchgear ", which despite this denomination may contain SF6, the air insulation being a means of external insulation of the insulating envelope.
  • the current When the circuit breaker opens in a circuit carrying a current, the current continues to circulate in the form of an electric arc which is generated between and after separation of the contacts of the circuit breaker.
  • the current In a gas blow-off circuit breaker, the current is cut off if the blowing is intense enough to cool the arc and turn it off. This cutoff is generally carried out at zero crossing of the current, because it is at this moment that the energy supplied by the network is minimal.
  • this power failure arrangement is, when the switch is opened, to effectively "blow" the electric arc, by means of a suitable pressure balance as well as a temperature distribution between the cooling channel and the enclosure up to the switch section.
  • the break is successful if the voltage that recovers between the contact elements or electrodes after the interruption of the current is at any time greater than a so-called transient recovery voltage (TTR) imposed by a targeted power grid.
  • TTR transient recovery voltage
  • a reboot or even in a few cases a reignition In particular, such a thermal reboot occurs very briefly during the first microseconds after the power failure. More details on the physical cut-off criteria can be obtained on the internet, for example under the link www.wikipedia.org from where some of this general information has been drawn.
  • the object of the invention is here to provide an electrical switch arrangement allowing increased cutoff capacity to prevent a reboot, particularly by a better control of the pressure balance and the distribution of the aforementioned temperatures.
  • the invention thus proposes a solution for these purposes in the form of an electrical switch arrangement according to claim 1.
  • Figure 1 has a longitudinal section of an electrical switch arrangement (or circuit breaker) with an internal arc phase element as soon as the circuit breaker break has been initiated.
  • the pressure output (SP) of the electrical switch section terminates in a first lateral opening of the enclosure and the valve is disposed on a second opening of the enclosure, namely ideally an opening laterally opposed to the first opening.
  • This configuration is however not exclusive or essential to the invention.
  • Said inner wall of the enclosure (EN) with the outer shell of the conductor (CL) forms a passageway below said wall for a first flow (FC1) of hot gas to the internal volume (VI) ( in the right part) of the enclosure, said internal volume thus becoming a volume of gas mainly hot, because a rise in temperature due to the heating of the electric arc causes a sharp increase in pressure vis-à-vis the valve thus preventing a complete opening of said valve (V1) to allow cooling of hot gas flows (FC1, FC2) accumulating in the chamber. Even if the valve (V1) opens slightly, it therefore allows a minority flow of cold gas (FF2) in the hot volume (VC) from the flow (FF1) from the cooling channel (CR).
  • Figure 2 has a longitudinal section of the same arrangement of electrical switch with an inner wall element according to the state of the art that figure 1 but at the end of blowing the electric arc.
  • This state of the arrangement thus reflects the end of cut for which the valve (V1) is at least almost completely open on the chamber, knowing that the pressure in the limited volume (VI) has decreased and forms a cooled volume (VD ) by cold gas flows (FF1, FF2, FF3, FF4) from the cooling channel (CR) via the internal volume (VI) to the arc zone (1).
  • An emerging stream of hot gas (FC2) emanating from the arc zone (1) is a minority.
  • the flow of return gas (FF3, FF4) and useful to the complete blowing of the arc that is to say forming from above then passing on an opening to the left of the left part of the wall internally (SP1) to end in the electric arc zone, will be mostly cold.
  • valve between the enclosure and the cooling channel does not have a fairly controlled and sufficiently high opening dynamics and a short cut-off time, so that also a dynamic and a distribution cooling flow in the enclosure are not optimal and therefore the risks of reintroduction are still present.
  • Figure 3 has a longitudinal section of an electrical switch arrangement according to the invention with internal wall in the electric arc phase. Analogously to the figure 1 , the arrangement is in a state of cutoff start, that is to say that the electric arc (SI) is formed and must be blown down minimizing a risk of rebooting.
  • SI electric arc
  • Said pressure shield means being permanent, ideally by an internal wall in the form of at least one permanent physical screen of the valve with regard to an arrival of gas flow leaving the pressure outlet (SP), the valve ( V1) can thus very advantageously open (see dotted position) and thus allow a passage of cold gas in the internal volume (VI) of the enclosure (EN) immediately at the beginning of the cut-off phase, in contrast to the closed and blocked valve state according to the figure 1 . Blow conditions in the arc zone in terms of temperature (down) and defined pressure can therefore be achieved faster and more efficiently.
  • the pressure output (SP) of the electrical switch section terminates in a first lateral opening of the enclosure and the valve is disposed on a second opening of the enclosure, namely ideally an opening laterally opposed to the first opening.
  • SP pressure output
  • the arrangement can simply provide that the inner wall mainly separates the enclosure into two lower and upper cavities (CI, CS) being coaxial with the axis of the electrical switch section.
  • the arrangement being mainly of cylindrical shape, the realization of the inner wall and its insertion into the enclosure is greatly simplified, as a subchamber of said enclosure.
  • the lower cavity is a hot gas receiver pressure tank delivered to the outlet (SP) of the electrical switch section and the upper cavity forms a cold gas receiver cooling pipe from the valve in the open position.
  • SP hot gas receiver pressure tank delivered to the outlet (SP) of the electrical switch section
  • the upper cavity forms a cold gas receiver cooling pipe from the valve in the open position.
  • the inner wall (PI) forms a closed surface around the elongate conductor (CL) and comprises a single opening coupled in the area of the pressure outlet (SP), said opening thus forming a cold gas inlet to the arc zone.
  • Figure 4 has a longitudinal section of the same electrical switch arrangement according to the invention that figure 3 but at the end of blowing the electric arc.
  • This state of the arrangement thus reflects the end of cut for which the valve (V1) is completely open on a guided channel (FF1, FF5, FF6, FF7, FF8, FF9) cold gas flow previously already mostly established since the phase according to figure 3 knowing that the valve (V1) of the figure 3 could open earlier than at the figure 1 .
  • the inner wall (PI) forms a closed surface around the elongate conductor (CL) and comprises a single opening (see reference CL1) coupled in the area of the pressure outlet (SP), said opening thus forming a cold gas inlet to the arc zone.
  • the inner wall may also comprise other openings, said openings each comprising at least one non-return valve (CL1, CL2, CL3) opening in case of overpressure of the channel of cooling with respect to the limited hot gas holding space and the pressure outlet (SP).
  • CL1, CL2, CL3 non-return valve

Landscapes

  • Circuit Breakers (AREA)

Claims (5)

  1. Elektrische Schalteranordnung, welche umfasst:
    - einen elektrischen Schalterabschnitt mit Lichtbogen (SI) eines lang gestreckten Leiters (CL), von dem ein Abschnitt seiner Hauptachse (AP) von wenigstens einer Hülle (EN) umgeben ist, die mit wenigstens einem Auslassventil (V1) eines außerhalb der Hülle befindlichen Kühlkanals (CR) gekoppelt ist, wobei sich dieses Ventil bei einem Druckgleichgewicht zwischen der Hülle und dem Kühlkanal öffnet,
    - einen Druckausgang (SP) von heißem Gas aus dem Schalterabschnitt zu einem Innenvolumen (VI) der Hülle,
    - wenigstens eine Innenwand (PI), die in der Hülle angeordnet ist,
    wobei die Innenwand einen begrenzten Aufnahmeraum (VC, VD) für heißes Gas in dem Innenvolumen (VI) der Hülle bildet, wobei dieser Aufnahmeraum ein ständiges Druckschutzschild-Mittel bildet, das wenigstens gegenüber dem Ventil angeordnet ist,
    dadurch gekennzeichnet, dass:
    - die Innenwand hauptsächlich die Hülle in zwei Hohlräume aufteilt, einen unteren und einen oberen (CI, CS), die koaxial mit der Achse des elektrischen Schalterabschnitts sind,
    der untere Hohlraum koaxial der nächste an der Hauptachse des elektrischen Schalterabschnitts ist und der obere Hohlraum sich am Innenumfang der Hülle befindet.
  2. Anordnung nach Anspruch 1, wobei der Druckausgang (SP) des elektrischen Schalterabschnitts zu einer ersten seitlichen Öffnung der Hülle führt und das Ventil (V1) an einer zweiten Öffnung der Hülle angeordnet ist, und zwar idealerweise einer zweiten Öffnung, die der ersten Öffnung seitlich gegenüberliegt, oder einer zweiten Öffnung (V3), die sich in der Nähe der ersten Öffnung befindet.
  3. Anordnung nach Anspruch 1, wobei der untere Hohlraum ein Druckbehälter zur Aufnahme von heißem Gas ist, das dem Ausgang (SP) des elektrischen Schalterabschnitts zugeführt wird, und der obere Hohlraum eine Kühlleitung bildet, die kaltes Gas aufnimmt, welches von dem Ventil in geöffneter Position kommt.
  4. Anordnung nach Anspruch 1, wobei die Innenwand eine geschlossene Fläche um den lang gestreckten Leiter (CL) herum bildet und eine einzige Öffnung umfasst, die im Bereich des Druckausgangs (SP) gekoppelt ist.
  5. Anordnung nach Anspruch 1 oder 4, wobei die Innenwand wenigstens ein Rückschlagventil (CL1, CL2, CL3) umfasst, das sich im Falle eines Überdrucks des Kühlkanals bezüglich des begrenzten Aufnahmeraums für heißes Gas und des Druckausgangs (SP) öffnet.
EP14290372.3A 2014-12-08 2014-12-08 Elektrische Schalteranordnung Not-in-force EP3032561B1 (de)

Priority Applications (1)

Application Number Priority Date Filing Date Title
EP14290372.3A EP3032561B1 (de) 2014-12-08 2014-12-08 Elektrische Schalteranordnung

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP14290372.3A EP3032561B1 (de) 2014-12-08 2014-12-08 Elektrische Schalteranordnung

Publications (2)

Publication Number Publication Date
EP3032561A1 EP3032561A1 (de) 2016-06-15
EP3032561B1 true EP3032561B1 (de) 2017-08-30

Family

ID=52134076

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Application Number Title Priority Date Filing Date
EP14290372.3A Not-in-force EP3032561B1 (de) 2014-12-08 2014-12-08 Elektrische Schalteranordnung

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EP (1) EP3032561B1 (de)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN112002605B (zh) * 2020-08-25 2022-08-12 西安西电开关电气有限公司 一种开关设备及其灭弧室

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0374384B1 (de) * 1988-12-23 1994-12-28 Licentia Patent-Verwaltungs-GmbH SF6-Eindruckschalter
DE4402121A1 (de) * 1994-01-21 1995-07-27 Siemens Ag Elektrischer Hochspannungs-Leistungsschalter mit einem Heizraum und einer Kompressionsvorrichtung
DE29520809U1 (de) * 1995-12-19 1996-02-15 Siemens AG, 80333 München Hochspannungs-Leistungsschalter mit einem Gasspeicherraum
JP5816345B2 (ja) * 2014-07-25 2015-11-18 株式会社東芝 ガス遮断器

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
None *

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