EP2546851B1 - Hochspannungsunterbrechungsvorrichtung in einem Stromnetz - Google Patents

Hochspannungsunterbrechungsvorrichtung in einem Stromnetz Download PDF

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Publication number
EP2546851B1
EP2546851B1 EP12175777.7A EP12175777A EP2546851B1 EP 2546851 B1 EP2546851 B1 EP 2546851B1 EP 12175777 A EP12175777 A EP 12175777A EP 2546851 B1 EP2546851 B1 EP 2546851B1
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EP
European Patent Office
Prior art keywords
interrupter
gas
blast
during
arc
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.)
Active
Application number
EP12175777.7A
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English (en)
French (fr)
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EP2546851A1 (de
Inventor
Denis Dufournet
Dan Penache
Nasser Kairouani
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General Electric Technology GmbH
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General Electric Technology GmbH
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Publication of EP2546851A1 publication Critical patent/EP2546851A1/de
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    • 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
    • H01H33/04—Means for extinguishing or preventing arc between current-carrying parts
    • H01H33/14—Multiple main contacts for the purpose of dividing the current through, or potential drop along, the arc
    • H01H33/143—Multiple main contacts for the purpose of dividing the current through, or potential drop along, the arc of different construction or type
    • 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
    • H01H33/04—Means for extinguishing or preventing arc between current-carrying parts
    • H01H33/14—Multiple main contacts for the purpose of dividing the current through, or potential drop along, the arc
    • H01H2033/146—Multiple main contacts for the purpose of dividing the current through, or potential drop along, the arc using capacitors, e.g. for the voltage division over the different switches
    • 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
    • H01H33/04—Means for extinguishing or preventing arc between current-carrying parts
    • H01H33/16—Impedances connected with contacts

Definitions

  • the invention relates to a cut-off device for use as a circuit-breaker in a high-voltage network comprising a casing having a longitudinal axis, at least a first gas-blown switch arranged in a first cut-off chamber inside said casing.
  • the first switch having a first pair of arc contacts which can be displaced relative to one another in translation in the longitudinal direction of the envelope.
  • TTR transient recovery voltage
  • RRRV rate of recovery
  • the maximum amplitude can be expressed as the ratio between the maximum value of the overvoltage and the nominal voltage of the network (in PU for "Per unit"). Excessive amplitude may result in the reformation of an electric arc after power failure in a network.
  • the rise speed which is expressed in KV / ⁇ s, is a factor that will determine whether an electric arc will reform and maintain itself at the terminals of the switchgear in the case where the latter is not adapted. for the application.
  • one pair of units will have an optimized design, one unit to support the transient recovery voltage during the thermal phase and the other The unit will be optimized to support the transient recovery voltage during the dielectric phase.
  • the devices with dedicated cutting units are already known, in particular, by the document EP 1 271 590 A1 which discloses a hybrid type breaking device comprising a casing filled with a dielectric gas and having on a longitudinal axis, a vacuum switch disposed in the casing, having a first pair of arcing contacts constituted by a first contact which is fixed and a second contact which can be displaced in translation in the longitudinal direction of the envelope, means provided to exert on the second contact a force such that the mutual pressure between the bearing surfaces of the first and the second contact is greater than a determined value as long as the vacuum switch allows the flow of current, a gas switch disposed in the casing, having a second pair of arcing contacts consisting of a third contact which is fixed and a fourth contact which can be displaced in translation in the longitudinal axial direction, further comprising a blowing chamber which comprises a blowing volume that, a rod of maneuver connected to the fourth contact and can be immobilized or moved in translation by control means.
  • This device further comprises a connecting means electrically connecting the second and third contacts, capable of being displaced in translation in the longitudinal axial direction, integrally with the second contact, of the displacement means connected to this connecting means and to the operating rod. to move them so as to separate the second and fourth contacts respectively of the first and third contacts.
  • the device described above comprises a gas-blown switch and a vacuum switch. This device is not suitable for breaking situations at a high voltage higher than 245kV. In addition, the vacuum interrupters are very expensive in high voltage when the short-circuit current exceeds 50 kA.
  • the document FR 1 300 504 A discloses a cut-off device (1, 2, 3, see figure 2 ) for use as a circuit breaker in a high-voltage network (70 to 400 kV) having a first switch (2), the first switch (2) having a first pair of arcing contacts which can be moved relative to one another to the other, and further comprising a second switch (1) connected in parallel with a capacitor (3).
  • the object of the invention is to provide an inexpensive alternative to overcome the disadvantages of the prior art described above.
  • the invention recommends a switching device according to claim 1 for use as a circuit breaker in a high-voltage network comprising a casing having a longitudinal axis, at least a first gas-blown switch disposed in a first cut-off chamber at the same time. inside said envelope, the first switch having a first pair of arcing contacts that can be moved relative to each other. the other in translation in the longitudinal direction of the envelope.
  • the device according to the invention further comprises a second gas-blowing switch arranged in a second breaking chamber and a capacitor connected in parallel with the second gas-blowing switch so that during a short-circuit cut, the regeneration voltage generated by the mains essentially applies to the second gas-blown switch during the dielectric phase of the break.
  • a second switch is configured to support the first portion of the transient recovery voltage (TRV) during a first so-called thermal phase and the first switch is configured to support a second portion of the transient recovery voltage at during a second so-called dielectric phase.
  • TRV transient recovery voltage
  • the capacitor connected in parallel with the second switch has a capacity less than or equal to 3 nF.
  • the first and second break chamber may contain the same gas or different gases.
  • the first gas-blown switch comprises a blowing nozzle of diameter greater than that of the blowing nozzle of the second gas-blowing switch.
  • the device according to the invention is intended to be used as a circuit breaker in a high voltage network in AIS (Air Insulated Switchgear) type stations.
  • AIS Air Insulated Switchgear
  • the device according to the invention is intended to be used as a circuit breaker in a high voltage network in GIS (Gas Insulated Switchgear) type stations.
  • GIS Gas Insulated Switchgear
  • the device according to the invention is intended to be used for a dead tank type circuit breaker.
  • the second switch is arranged perpendicular to the longitudinal direction of the envelope.
  • the gas-blowing switches are arranged on two perpendicular axes.
  • the device according to the invention comprises four gas-blown pole interrupters, two of said gas-blown switches being adapted to support the transient recovery voltage during the dielectric phase, and the other two switches being adapted to support the transient recovery voltage during the phase thermal.
  • the device according to the invention comprises four gas-blown switches by poles, three of said gas-blown switches being intended to support the transient recovery voltage during the dielectric phase, and a switch with gas blowing being intended to support the transient recovery voltage during the thermal phase.
  • the figure 1 represents a cut-off device 2 intended to be used as a circuit-breaker in a high-voltage network comprising an envelope 4 having a longitudinal axis 6, a first gas-blown switch 8 arranged in a first breaking chamber 10 inside the envelope 4, the first switch 8 comprising a first pair of arcing contacts consisting of a first contact 12 which is fixed and a second contact 14 which can be displaced in translation in the longitudinal direction of the envelope 4 under action of an actuator not shown via a longitudinal rod 18.
  • the device further comprises a second gas-blown switch 20 disposed in a second interrupting chamber 22 and a capacitor 24 connected in parallel with the second gas-blown switch 20 so that, during a short-circuit break, the regeneration voltage generated by the grating in the dielectric phase essentially applies to the first gas-blown switch.
  • the second gas-blast switch 20 comprises a fixed contact 30 and a movable contact 32 connected to a part 34 which moves perpendicularly to the horizontal axis of the envelope 4.
  • the device comprises a slideway 50 connected on the one hand to the second contact 14 via the movable rod 18 and on the other hand to the piece 34.
  • the operating member moves the workpiece 18 down to separate the arcing contacts 12 and 14 from the first switch 8.
  • the shape of the slideway 50 is designed such that during the displacement of the rod 18 downwards, in a first step, the arcing contacts 12 and 14 remain stationary for a few milliseconds while the moving contact 32 of the second switch 20 moves with respect to the fixed contact 30 during this period of time, so that the contacts of the first switch 8 open after those of the second switch 20 with a predetermined delay by the shape of the slide 50.
  • the figure 2 schematically illustrates the evolution of the voltage TTR across the circuit breaker as a function of time after the tripping of the circuit breaker.
  • the voltage TTR increases rapidly for a short interval of a few microseconds between the beginning of the voltage recovery and a time t1 to reach a first value U1, then continues to grow slower during a longer interval of several hundred microseconds between time t1 and a second time t2 to reach a maximum value Uc at time t2.
  • the first interval corresponds to the thermal phase and the second interval corresponds to the dielectric phase.
  • the circuit breaker When the current passes through zero, the circuit breaker succeeds in breaking if it is able to withstand the voltage TTR, first in the thermal phase, then in the dielectric phase.
  • the latter when the separation of the contacts of the second switch 20 is sufficient, the latter makes it possible to withstand the voltage TTR during the thermal phase.
  • the interrupting chamber of the first switch 8 is designed so that its blowing nozzle has a diameter greater than that of the blowing nozzle of the second switch 20. This gives the first switch 8 a sufficient voltage withstand during the dielectric phase.
  • the presence of the capacitor 24 in parallel with the second switch 20 has the consequence that the voltage TTR is applied mainly to the first switch 8 during the dielectric phase.
  • the embodiment shows that the first switch has a fixed contact and a movable contact.
  • the same principle is applicable with a first switch having two movable contacts with a relative movement of the one relative to the other, as shown for example in the patent EP 1 032 009 .

Landscapes

  • Circuit Breakers (AREA)
  • Gas-Insulated Switchgears (AREA)

Claims (11)

  1. Unterbrechervorrichtung (2) zur Verwendung als Schutzschalter in einem Hochspannungsnetz, umfassend eine Hülle (4) mit einer Längsachse (6), einen ersten Unterbrecher mit Gasbeblasung (8) und einen zweiten Unterbrecher mit Gasbeblasung (20), wobei der zweite Unterbrecher dazu ausgelegt ist, einen ersten Teil der Einschwingspannung im Verlauf einer ersten sogenannten thermischen Phase auszuhalten, und der erste Unterbrecher dazu ausgelegt ist, einen zweiten Teil der Einschwingspannung im Verlauf einer zweiten sogenannten dielektrischen Phase auszuhalten, wobei der erste Unterbrecher mit Gasbeblasung (8) in einer ersten Unterbrecherkammer (10) innerhalb der Hülle (4) angeordnet ist und ein erstes Paar von Bogenkontakten (12) und (14) umfasst, die relativ zueinander in Translation in der Längsrichtung der Hülle (4) verlagert werden können, wobei der zweite Unterbrecher mit Gasbeblasung (20) in einer zweiten Unterbrecherkammer (22) angeordnet und parallel zu einem Kondensator (24) montiert ist, derart, dass während einer Kurzschlussunterbrechung die vom Netz erzeugte Wiederkehrspannung im Wesentlichen am ersten Unterbrecher mit Gasbeblasung (8) während der dielektrischen Phase anliegt, wobei der zweite Unterbrecher mit Gasbeblasung (20) einen festen Kontakt (30) und einen beweglichen Kontakt (32) umfasst, der mit einem Element (34) verbunden ist, das sich orthogonal zur horizontalen Achse der Hülle (4) verlagert, wobei eine Gleitführung (50) einerseits über die bewegliche Stange (18) mit dem zweiten Kontakt (14) verbunden ist und andererseits mit dem Element (34), derart, dass bei einer Auslösung ein Betätigungsorgan die bewegliche Stange (18) nach unten verlagert, um die Bogenkontakte (12) und (14) des ersten Unterbrechers (8) zu separieren, wobei die Form der Gleitführung (50) derart gestaltet ist, dass während der Verlagerung der beweglichen Stange (18) nach unten in einem ersten Zeitraum die Bogenkontakte (12) und (14) während einer vordefinierten Zeitspanne unbeweglich bleiben, wohingegen sich der bewegliche Kontakt (32) des zweiten Unterbrechers (20) relativ zum festen Kontakt (30) während dieser Zeitspanne verlagert, derart, dass die Kontakte des ersten Unterbrechers (8) sich nach jenen des zweiten Unterbrechers (20) mit einer Verzögerung öffnen, die durch die Form der Gleitführung (50) vorbestimmt ist.
  2. Vorrichtung nach Anspruch 1, wobei der zweite Unterbrecher dazu ausgelegt ist, einen ersten Teil der Einschwingspannung im Verlauf einer ersten sogenannten thermischen Phase auszuhalten, und der erste Unterbrecher dazu ausgelegt ist, einen zweiten Teil der Einschwingspannung im Verlauf einer zweiten sogenannten dielektrischen Phase auszuhalten.
  3. Vorrichtung nach Anspruch 1, die dazu ausgelegt ist, als Schutzschalter in einem Hochspannungsnetz in Stationen vom Typ AIS (Air Insulated Switchgear) verwendet zu werden.
  4. Vorrichtung nach Anspruch 3, die dazu ausgelegt ist, als Schutzschalter in einem Hochspannungsnetz in Stationen vom Typ GIS (Gas Insulated Switchgear) verwendet zu werden.
  5. Vorrichtung nach Anspruch 3, die dazu ausgelegt ist, als Schutzschalter vom Typ Dead tank verwendet zu werden.
  6. Vorrichtung nach Anspruch 1, wobei der zweite Unterbrecher orthogonal zur Längsrichtung der Hülle angeordnet ist.
  7. Vorrichtung nach einem der Ansprüche 6 oder 7, wobei die Unterbrecher mit Gasbeblasung auf zwei orthogonalen Achsen angeordnet sind.
  8. Vorrichtung nach Anspruch 1, wobei der Kondensator (24) eine Kapazität kleiner oder gleich 3 nF hat.
  9. Vorrichtung nach Anspruch 1, wobei die erste Unterbrecherkammer (10) und die zweite Unterbrecherkammer (22) ein und dasselbe Gas enthalten.
  10. Vorrichtung nach Anspruch 1, wobei die erste Unterbrecherkammer (10) und die zweite Unterbrecherkammer (22) unterschiedliche Gase enthalten.
  11. Vorrichtung nach Anspruch 1, wobei der erste Unterbrecher mit Gasbeblasung (20) eine Blasdüse mit einem Durchmesser größer als jener der Blasdüse des zweiten Unterbrechers mit Gasbeblasung (8) umfasst.
EP12175777.7A 2011-07-12 2012-07-10 Hochspannungsunterbrechungsvorrichtung in einem Stromnetz Active EP2546851B1 (de)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR1156331A FR2977972A1 (fr) 2011-07-12 2011-07-12 Dispositif interrupteur pour haute tension dans un reseau electrique

Publications (2)

Publication Number Publication Date
EP2546851A1 EP2546851A1 (de) 2013-01-16
EP2546851B1 true EP2546851B1 (de) 2016-10-19

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EP12175777.7A Active EP2546851B1 (de) 2011-07-12 2012-07-10 Hochspannungsunterbrechungsvorrichtung in einem Stromnetz

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EP (1) EP2546851B1 (de)
FR (1) FR2977972A1 (de)

Family Cites Families (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR1300504A (fr) * 1960-09-16 1962-08-03 Brown Interrupteur de puissance avec capacités en parallèle
DE1236052B (de) * 1960-10-26 1967-03-09 Continental Elektro Ind Ag Hochspannungsleistungsschalter mit mehreren in Reihe geschalteten Schaltstellen pro Pol
GB1604938A (en) * 1978-03-01 1981-12-16 Westinghouse Electric Corp Upstanding mounting structures for high-voltage multibreak circuit-breakers
DE3914730A1 (de) * 1989-04-28 1990-10-31 Siemens Ag Metallgekapselter, gasiolierter hochspannungs-leistungsschalter mit mindestens zwei unterbrechereinheiten pro pol
FR2729250A1 (fr) * 1995-01-06 1996-07-12 Gec Alsthom T & D Sa Disjoncteur a deux chambres de coupure par pole
FR2780210B1 (fr) * 1998-06-19 2000-07-13 Alsthom Gec Dispositif limiteur pour disjoncteur haute tension a cuve metallique mise a la terre
DE19907838A1 (de) 1999-02-24 2000-08-31 Alstom Energietechnik Gmbh Druckgasschalter
FR2826503B1 (fr) 2001-06-25 2003-09-05 Alstom Chambre de coupure avec ampoule a vide
FR2901055B1 (fr) * 2006-05-12 2008-07-04 Areva T & D Sa Disjoncteur sectionneur d'alternateur actionne par un servo-moteur

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EP2546851A1 (de) 2013-01-16
FR2977972A1 (fr) 2013-01-18

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