EP3172753B1 - Clip for connecting a low-current device to a gas insulated substation allowing said device to be disconnected for an operational test phase of the substation - Google Patents

Clip for connecting a low-current device to a gas insulated substation allowing said device to be disconnected for an operational test phase of the substation Download PDF

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Publication number
EP3172753B1
EP3172753B1 EP15747112.9A EP15747112A EP3172753B1 EP 3172753 B1 EP3172753 B1 EP 3172753B1 EP 15747112 A EP15747112 A EP 15747112A EP 3172753 B1 EP3172753 B1 EP 3172753B1
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EP
European Patent Office
Prior art keywords
electrode
substation
envelope
contactor
moveable
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EP15747112.9A
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German (de)
French (fr)
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EP3172753A1 (en
Inventor
Samuel SOUCHAL
Jérémy RAVEL
Christophe Rech
Walter CHESNEAU
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General Electric Technology GmbH
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General Electric Technology GmbH
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Publication of EP3172753A1 publication Critical patent/EP3172753A1/en
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    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H31/00—Air-break switches for high tension without arc-extinguishing or arc-preventing means
    • H01H31/003—Earthing switches
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H1/00—Contacts
    • H01H1/12—Contacts characterised by the manner in which co-operating contacts engage
    • H01H1/14—Contacts characterised by the manner in which co-operating contacts engage by abutting
    • H01H1/24—Contacts characterised by the manner in which co-operating contacts engage by abutting with resilient mounting

Definitions

  • the invention relates to gas insulated electrical substations, which are installations located at the junction of transmission lines and / or electric power distribution, such as medium or high voltage lines.
  • a gas insulated substation generally designated by the acronym GIS stands for Gas Insulted Station, is a station comprising an envelope containing various electrical equipment.
  • This envelope which is typically metallic, is watertight and contains a dielectric gas, that is to say an insulating gas, such as SF6. It isolates electrically from the external environment the equipment it contains.
  • a dielectric gas that is to say an insulating gas, such as SF6. It isolates electrically from the external environment the equipment it contains.
  • These equipment which are at very high electrical voltages, are in particular conducting bars, circuit breakers and / or disconnectors operating at high or medium voltage.
  • Such a gas-insulated station is also equipped with voltage transformers to measure the voltage in the substation, and surge arresters to protect the substation from possible surges.
  • the voltage at the secondary stage of a voltage transformer is proportional to that of the primary stage while being much lower than it.
  • a voltage of 400 kV on the primary stage is thus reduced to 100V on the secondary stage.
  • a measurement of the voltage of the second stage thus makes it possible to know the voltage on the first stage.
  • the surge arrester provides the link between the substation and the earth that it connects by a series of varistors, so that in case of occurrence of a surge on the station, it is resorbed before to cause damage to the equipment of the station.
  • dielectric tests Prior to commissioning, dielectric tests are performed to verify that the item fulfills various operational criteria. The implementation of these tests requires that some apparatus of the station, in particular surge arresters and voltage transformers are disconnected.
  • disconnections require that the station is de-energized to drain the gas, disconnect the concerned conductors, close the envelope portion containing the other equipment, and refill it with insulating gas.
  • the unit When the test has been performed, the unit must be powered down again, drain the gas, reconnect each voltage transformer and each surge arrester before refilling the gas envelope.
  • the emptying and filling operations are further complicated by the fact that the insulating gas is harmful to the environment.
  • DE 10 2010 060696 discloses a three-phase gas-insulated transformer having an envelope containing three switches each including a base connected to a member resembling a conductive bar, the base carrying a rotatable contact blade.
  • the blade is movable between an electrically closed position where its end is in contact clamped between two lamellae of a fixed contact connected to a winding of the transformer, and an electrically open position where it is retracted into the base.
  • This blade which can also occupy a third position of contact with a second fixed contact, is moved by an actuator located outside the envelope, and to which it is connected by an axis passing through the envelope.
  • the gas-insulated station can integrate devices for temporarily disconnecting, off, the equipment to be disconnected to perform the operational tests of the station prior to its commissioning.
  • the invention also relates to a splice as defined above, further comprising a support rigidly secured to one end of the envelope portion and to the electrode for supporting the electrode.
  • the invention also relates to a splice as defined above, further comprising a support rigidly secured to one end of the envelope portion and carrying the electrode.
  • the splint according to the invention further comprises a sliding-mounted button at the free end of the movable contactor with a spring reminding continuously this key to an extended position so that it exerts a straight support on the fixed contact when the movable contactor is in the closed position .
  • the invention also relates to a splice as defined above, in which the movable contactor is significantly closer to the envelope when it occupies its open position than when it occupies its closed position.
  • the invention also relates to a splice as defined above, wherein the arm is connected to the movable contactor being rigidly secured to the movable switch, and wherein the arm extends along the axis of rotation of the movable contactor.
  • the invention also relates to a gas-insulated station comprising at least one low-current switchgear, such as a voltage transformer or a surge arrester, and in which this apparatus is connected to a busbar of the substation via a splice as defined above.
  • a low-current switchgear such as a voltage transformer or a surge arrester
  • the invention is based on the finding that the voltage transformer and lightning arrester apparatus are traversed by a low current when they operate, and that the disconnection of these devices for an operational test is performed without voltage, and that these are grounded during the test.
  • a voltage transformer comprises a primary winding connected on the one hand to a busbar of the station, for example by means of a capacitor, and on the other hand to ground.
  • This transformer is traversed by a current of derisory intensity because it is a voltage measuring transformer therefore having a substantially zero consumption.
  • a surge arrester connects the station to earth by varistors, so it is also crossed by a low intensity leakage current when absorbing a surge. This current is zero in the absence of overvoltage.
  • the current flowing through them is low: it is of an order of magnitude less than one ampere.
  • the means for disconnecting in the test phase of such equipment are in the form of a splice having a substantially zero breaking capacity, and having a mobile switch located on the equipment side to be grounded during the test. In the open state, this moving contact can be close to the envelope without the risk of starting an electric arc during the test.
  • This electrical splice has a breaking capacity lower than that of a disconnector whose breaking capacity allows it to withstand residual currents in the opening phase.
  • the figure 1 shows in its lower part a station portion 1 having a conductor bar 2 which is under high voltage when the station is in operation and also during the performance of the operational tests prior to commissioning.
  • This conductive bar 2 which here extends horizontally along an axis normal to the plane of the figure 1 , and that appears in the figure 2 being identified by AX1, is surrounded by a sealed envelope 3.
  • This envelope 3 which is metallic and generally tubular in shape to surround the conductive bar 2 is here represented only partially. It encloses an insulating gas to avoid the formation of electric arcs between the bar and the envelope.
  • This bar 2 is equipped with a connection terminal 4, which protrudes from its upper face to extend perpendicular to this bar 2 which supports it, upwards in the figures.
  • connection terminal 4 protrudes from the lower portion 3 of the envelope through an upper opening 6 thereof.
  • This terminal 4 is surrounded by another sealed casing section, identified by 8, having a general shape of a cylinder trunk, extending perpendicularly to the lower portion 3.
  • the lower edge 9 of the section d The cylinder trunk shell 8 is thus sealingly attached to the opening 6.
  • This portion of cylinder trunk shell 8 extends vertically far beyond the end 7 of the terminal 4. It carries at its upper end 11 in the form of a circular edge, an electrically insulating support 12, of shape here generally conical, which maintains an electrode 13 extending on either side of the support 12.
  • This support 12 may comprise openings for passing the insulating gas, or be closed to form a sealed barrier to compartmentalize the envelope of the post.
  • This electrode 13 extends in the envelope section 8 to the terminal 4, the terminal 4 and the electrode 13 having both forms of revolution. They extend in the extension of one another, along an axis AY normal to the axis AX1, and they have their ends spaced apart from one another in the central region of the section of envelope 8.
  • the free end 14 of the electrode 13 thus faces the free end 7 of the terminal 4.
  • the free end 14 of the electrode 13 is equipped with an electric switch 16 movable between a connection position, as in FIG. figure 2 , where it extends in the space between the ends 7 and 14 to electrically connect them to one another, and a disconnection position, as in the figure 1 where it is folded to leave this empty space.
  • This contactor 16 has an end which is articulated on the end 14 of the electrode 13.
  • This end has a double clevis shape, comprising two wings 17 and 18 extending on either side of the single clevis that constitutes the end 14 of the electrode 13.
  • This rotating arm 19 which has an axis shape is rigidly secured to the wings of the double yoke of the movable contactor 16. It thus constitutes both an axis of articulation of the movable contactor 16 on the electrode 13 and a maneuvering member of this mobile contactor 16.
  • this rotating arm 19 made of insulating material, passes through an opening 21 of the envelope section 8 to be accessible and operable from outside the envelope.
  • the movable contactor 16 As visible in the figure 2 when the movable contactor 16 is in the connection position, it extends in the space separating the terminal 4 and the electrode 13 to join them together by prolonging them.
  • the terminal with the electrode and the movable contact 16 then constitute an assembly generally having a shape of revolution about the axis AY being located at a distance from the envelope 8. In fact, there is no risk of ignition of an electric arc.
  • the free end of the contactor 16 is provided with a contact key 22, movable in translation along the main direction of the contactor.
  • This key 22 is secured by a return spring continuously tending to pull it out so that it protrudes from the free end of the moving contactor 16.
  • This movable key ensures that a frank contact is established in all circumstances with the end 7 of the terminal 4, when the movable contactor 16 is placed in connection position as in the figure 2 .
  • the movable contactor 16 As visible in the figure 1 when the movable contactor 16 is in the disconnected position, it extends perpendicularly to the axis AY of the terminal 4 and the electrode 13, so that its free end is then at a short distance from the inner surface of the section envelope 8.
  • this mobile contactor 16 is not energized, so that it does not can not initiate an electric arc despite its low proximity to the envelope 8. During a test phase, it is only the terminal 4 which is under high voltage.
  • the invention takes advantage of the fact that it aims to allow the disconnection only for test phases of low current devices that are grounded including during these tests.
  • the splint according to the invention constitutes a small-sized member that can be associated with any low current switchgear to be disconnected and which is grounded in the test phase of the station it equips.
  • the station is designed with fishplates according to the invention for each low-current switchgear to be disconnected and grounded in test phase.

Landscapes

  • Gas-Insulated Switchgears (AREA)

Description

DOMAINE TECHNIQUETECHNICAL AREA

L'invention concerne les postes électriques isolés au gaz, qui sont des installations situées à la jonction de lignes de transport et/ou de distribution de courant électrique, telles que des lignes à moyenne ou haute tension.The invention relates to gas insulated electrical substations, which are installations located at the junction of transmission lines and / or electric power distribution, such as medium or high voltage lines.

ÉTAT DE LA TECHNIQUE ANTÉRIEURESTATE OF THE PRIOR ART

Un poste électrique isolé au gaz, généralement désigné par l'acronyme anglo-saxon GIS signifiant Gas Insultated Station, est un poste comportant une enveloppe renfermant différents équipements électriques.A gas insulated substation, generally designated by the acronym GIS stands for Gas Insulted Station, is a station comprising an envelope containing various electrical equipment.

Cette enveloppe qui est typiquement métallique, est étanche et contient un gaz diélectrique, c'est-à-dire isolant, tel que du SF6. Elle isole électriquement de l'environnement externe les équipements qu'elle renferme. Ces équipements qui sont à des tensions électriques très élevées sont notamment des barres conductrices, des disjoncteurs et/ou des sectionneurs fonctionnant à haute ou moyenne tension.This envelope, which is typically metallic, is watertight and contains a dielectric gas, that is to say an insulating gas, such as SF6. It isolates electrically from the external environment the equipment it contains. These equipment, which are at very high electrical voltages, are in particular conducting bars, circuit breakers and / or disconnectors operating at high or medium voltage.

Un tel poste isolé au gaz est aussi équipé de transformateurs de tension servant à mesurer la tension dans le poste, et de parafoudres pour protéger le poste d'éventuelles surtensions.Such a gas-insulated station is also equipped with voltage transformers to measure the voltage in the substation, and surge arresters to protect the substation from possible surges.

La tension à l'étage secondaire d'un transformateur de tension est proportionnelle à celle de l'étage primaire tout en étant très inférieure à celle-ci. Une tension de 400 kV sur l'étage primaire est ainsi ramenée à 100V sur l'étage secondaire. Une mesure de la tension du second étage permet ainsi de connaître la tension sur le premier étage.The voltage at the secondary stage of a voltage transformer is proportional to that of the primary stage while being much lower than it. A voltage of 400 kV on the primary stage is thus reduced to 100V on the secondary stage. A measurement of the voltage of the second stage thus makes it possible to know the voltage on the first stage.

En ce qui concerne le parafoudre, il assure le lien entre le poste et la terre qu'il relie par une série de varistances, de sorte qu'en cas d'apparition d'une surtension sur le poste, celle-ci soit résorbée avant de causer des dommages aux équipements du poste.Regarding the surge arrester, it provides the link between the substation and the earth that it connects by a series of varistors, so that in case of occurrence of a surge on the station, it is resorbed before to cause damage to the equipment of the station.

Préalablement à la mise en service, des tests diélectriques sont réalisés pour vérifier que le poste remplit différents critères opérationnels. La mise en oeuvre de ces tests nécessite que certains appareillages du poste, en particulier les parafoudres et transformateurs de tension soient déconnectés.Prior to commissioning, dielectric tests are performed to verify that the item fulfills various operational criteria. The implementation of these tests requires that some apparatus of the station, in particular surge arresters and voltage transformers are disconnected.

Ces déconnexions nécessitent que le poste soit hors tension pour vidanger le gaz, désaccoupler les conducteurs concernés, refermer la partie d'enveloppe renfermant les autres équipements, et la remplir à nouveau de gaz isolant.These disconnections require that the station is de-energized to drain the gas, disconnect the concerned conductors, close the envelope portion containing the other equipment, and refill it with insulating gas.

Lorsque le test a été réalisé, il faut à nouveau mettre le poste hors tension, vidanger le gaz, reconnecter chaque transformateur de tension et chaque parafoudre avant de remplir à nouveau l'enveloppe de gaz.When the test has been performed, the unit must be powered down again, drain the gas, reconnect each voltage transformer and each surge arrester before refilling the gas envelope.

Les opérations de vidange et de remplissage sont encore compliquées par le fait que le gaz isolant est nocif pour l'environnement.The emptying and filling operations are further complicated by the fact that the insulating gas is harmful to the environment.

Une autre possibilité consiste à intégrer aux parafoudres et transformateurs de tension des moyens de déconnexion destinés à être manoeuvrés uniquement durant les phases de test de mise en service. Mais les systèmes existants ne sont pas satisfaisants du fait que compte tenu des tensions élevées, les moyens de déconnexion sont volumineux et ont un coût élevé.Another possibility is to integrate in the surge arresters and voltage transformers disconnection means intended to be operated only during the commissioning test phases. However, the existing systems are not satisfactory because, in view of the high voltages, the disconnection means are bulky and have a high cost.

DE 10 2010 060696 décrit un transformateur triphasé isolé au gaz comportant une enveloppe renfermant trois commutateurs incluant chacun une embase reliée à un élément s'apparentant à une barre conductrice, cette embase portant une lame formant contact mobile en rotation. La lame est déplaçable entre une position électriquement fermée où son extrémité est en contact enserrée entre deux lamelles d'un contact fixe relié à un bobinage du transformateur, et une position électriquement ouverte où elle est escamotée dans l'embase. Cette lame, qui peut aussi occuper une troisième position de contact avec un second contact fixe, est déplacée par un actionneur situé hors de l'enveloppe, et auquel elle est reliée par un axe traversant cette enveloppe. DE 10 2010 060696 discloses a three-phase gas-insulated transformer having an envelope containing three switches each including a base connected to a member resembling a conductive bar, the base carrying a rotatable contact blade. The blade is movable between an electrically closed position where its end is in contact clamped between two lamellae of a fixed contact connected to a winding of the transformer, and an electrically open position where it is retracted into the base. This blade, which can also occupy a third position of contact with a second fixed contact, is moved by an actuator located outside the envelope, and to which it is connected by an axis passing through the envelope.

EXPOSÉ DE L'INVENTIONSTATEMENT OF THE INVENTION

L'invention a pour objet une éclisse de connexion à une barre conductrice de poste isolé au gaz, d'un appareillage à courant faible relié à la terre, cette éclisse étant manoeuvrable lorsqu'elle est hors tension pour déconnecter l'appareillage en vue d'une phase de test opérationnel du poste, cette éclisse comprenant :

  • une électrode destinées à être connectée à l'appareillage, cette électrode ayant une extrémité libre portant un contacteur mobile en rotation entre une position fermée où il s'étend dans le prolongement de cette électrode pour avoir son extrémité libre en appui sur une borne de la barre conductrice et une position ouverte de déconnexion dans laquelle son extrémité libre est écartée de la région prolongeant l'électrodes qui le porte ;
  • une portion d'enveloppe étanche entourant l'électrode et le contact mobile qu'elle porte ;
  • un bras relié au contacteur mobile et traversant de manière étanche la portion d'enveloppe pour être manoeuvrable depuis l'extérieur de l'enveloppe afin de déplacer le contacteur mobile d'une position à l'autre.
The invention relates to a splice connection to a gas-insulated post conductor bar, a low-current equipment connected to the ground, this splice being operable when it is de-energized to disconnect the apparatus for the purpose of an operational test phase of the substation, this splint comprising:
  • an electrode intended to be connected to the equipment, this electrode having a free end carrying a contactor movable in rotation between a closed position where it extends in the extension of this electrode to have its free end resting on a terminal of the busbar and an open disconnection position in which its free end is spaced from the extending region the electrodes that carry it;
  • a sealed envelope portion surrounding the electrode and the movable contact that it carries;
  • an arm connected to the movable contactor and sealingly traversing the envelope portion to be operable from outside the envelope to move the movable switch from one position to the other.

Grâce à l'invention, le poste isolé au gaz peut intégrer des organes permettant de déconnecter temporairement, hors tension, les appareillages devant être déconnectés pour réaliser les tests opérationnels du poste préalablement à sa mise en service.Thanks to the invention, the gas-insulated station can integrate devices for temporarily disconnecting, off, the equipment to be disconnected to perform the operational tests of the station prior to its commissioning.

L'invention concerne également une éclisse telle que définie ci-dessus, comprenant en outre un support rigidement solidarisé à une extrémité de la portion d'enveloppe et à l'électrode pour supporter cette électrode.The invention also relates to a splice as defined above, further comprising a support rigidly secured to one end of the envelope portion and to the electrode for supporting the electrode.

L'invention concerne également une éclisse telle que définie ci-dessus, comprenant en outre un support rigidement solidarisé à une extrémité de la portion d'enveloppe et portant l'électrode.The invention also relates to a splice as defined above, further comprising a support rigidly secured to one end of the envelope portion and carrying the electrode.

L'éclisse selon l'invention comprend encore une touche montée coulissante en extrémité libre du contacteur mobile avec un ressort rappelant continuellement cette touche vers une position sortie pour qu'elle exerce un appui franc sur le contact fixe lorsque le contacteur mobile est en position fermée.The splint according to the invention further comprises a sliding-mounted button at the free end of the movable contactor with a spring reminding continuously this key to an extended position so that it exerts a straight support on the fixed contact when the movable contactor is in the closed position .

L'invention concerne également une éclisse telle que définie ci-dessus, dans laquelle le contacteur mobile est significativement plus proche de l'enveloppe lorsqu'il occupe sa position ouverte que lorsqu'il occupe sa position fermée.The invention also relates to a splice as defined above, in which the movable contactor is significantly closer to the envelope when it occupies its open position than when it occupies its closed position.

L'invention concerne également une éclisse telle que définie ci-dessus, dans laquelle le bras est relié au contacteur mobile en étant rigidement solidarisé à ce contacteur mobile, et dans laquelle ce bras s'étend selon l'axe de rotation du contacteur mobile.The invention also relates to a splice as defined above, wherein the arm is connected to the movable contactor being rigidly secured to the movable switch, and wherein the arm extends along the axis of rotation of the movable contactor.

L'invention concerne également un poste isolé au gaz comportant au moins un appareillage à faible courant, tel qu'un transformateur de tension ou un parafoudre, et dans lequel cet appareillage est relié à une barre conductrice du poste par l'intermédiaire d'une éclisse telle que définie ci-dessus.The invention also relates to a gas-insulated station comprising at least one low-current switchgear, such as a voltage transformer or a surge arrester, and in which this apparatus is connected to a busbar of the substation via a splice as defined above.

BRÈVE DESCRIPTION DES DESSINSBRIEF DESCRIPTION OF THE DRAWINGS

  • la figure 1 est une vue de l'éclisse selon l'invention selon un plan de coupe transversal lorsqu'elle est électriquement ouverte ;the figure 1 is a view of the splice according to the invention in a transverse sectional plane when electrically open;
  • la figure 2 est une vue de l'éclisse selon l'invention selon un plan de coupe longitudinal lorsqu'elle est électriquement fermée.the figure 2 is a view of the splice according to the invention in a longitudinal sectional plane when electrically closed.
EXPOSÉ DÉTAILLÉ DE MODES DE RÉALISATION PARTICULIERSDETAILED PRESENTATION OF PARTICULAR EMBODIMENTS

L'invention est basée sur le constat selon lequel les appareillages de type transformateur de tension et parafoudre sont traversés par un courant faible lorsqu'ils fonctionnent, et que la déconnexion de ces appareillages en vue d'un test opérationnel est réalisée hors tension, et que ceux-ci sont à la terre durant le test.The invention is based on the finding that the voltage transformer and lightning arrester apparatus are traversed by a low current when they operate, and that the disconnection of these devices for an operational test is performed without voltage, and that these are grounded during the test.

Plus concrètement, un transformateur de tension comporte un bobinage primaire connecté d'une part à une barre conductrice du poste, par exemple par l'intermédiaire d'une capacité, et d'autre part à la terre. Ce transformateur est parcouru par un courant d'intensité dérisoire du fait qu'il s'agit d'un transformateur de mesure de tension ayant par conséquent une consommation sensiblement nulle. Un parafoudre relie quant à lui le poste à la terre par des varistances, de sorte qu'il est lui aussi traversé par un courant de fuite de faible intensité lorsqu'il absorbe une surtension. Ce courant est nul en l'absence de surtension.More specifically, a voltage transformer comprises a primary winding connected on the one hand to a busbar of the station, for example by means of a capacitor, and on the other hand to ground. This transformer is traversed by a current of derisory intensity because it is a voltage measuring transformer therefore having a substantially zero consumption. A surge arrester connects the station to earth by varistors, so it is also crossed by a low intensity leakage current when absorbing a surge. This current is zero in the absence of overvoltage.

Par contraste avec les tensions élevées auxquelles sont soumis ces appareillages, qui sont de l'ordre de 400 kV et plus, le courant qui les traverse est faible : il est d'un ordre de grandeur inférieur à un ampère.In contrast with the high voltages to which these devices are subjected, which are of the order of 400 kV and more, the current flowing through them is low: it is of an order of magnitude less than one ampere.

Selon l'invention, les moyens pour déconnecter en phase de test de tels appareillages se présentent sous forme d'une éclisse ayant un pouvoir de coupure sensiblement nul, et comportant un contacteur mobile situé côté appareillage pour être à la terre durant le test. A l'état ouvert ce contact mobile peut être proche de l'enveloppe sans risque d'amorçage d'un arc électrique durant le test.According to the invention, the means for disconnecting in the test phase of such equipment are in the form of a splice having a substantially zero breaking capacity, and having a mobile switch located on the equipment side to be grounded during the test. In the open state, this moving contact can be close to the envelope without the risk of starting an electric arc during the test.

Cette éclisse électrique a un pouvoir de coupure inférieur à celui d'un sectionneur dont le pouvoir de coupure lui permet de supporter des courants résiduels en phase d'ouverture.This electrical splice has a breaking capacity lower than that of a disconnector whose breaking capacity allows it to withstand residual currents in the opening phase.

La figure 1 montre dans sa partie inférieure une portion de poste 1 comportant une barre conductrice 2 qui est sous une tension élevée lorsque le poste est en service et également pendant la réalisation des tests opérationnels préalables à la mise en service.The figure 1 shows in its lower part a station portion 1 having a conductor bar 2 which is under high voltage when the station is in operation and also during the performance of the operational tests prior to commissioning.

Cette barre conductrice 2 qui s'étend ici horizontalement selon un axe normal au plan de la figure 1, et qui apparaît dans la figure 2 en y étant repéré par AX1, est entourée d'une enveloppe étanche 3.This conductive bar 2 which here extends horizontally along an axis normal to the plane of the figure 1 , and that appears in the figure 2 being identified by AX1, is surrounded by a sealed envelope 3.

Cette enveloppe 3 qui est métallique et de forme généralement tubulaire pour entourer la barre conductrice 2 est ici représentée de manière uniquement partielle. Elle renferme un gaz isolant pour éviter la formation d'arcs électriques entre la barre et l'enveloppe.This envelope 3 which is metallic and generally tubular in shape to surround the conductive bar 2 is here represented only partially. It encloses an insulating gas to avoid the formation of electric arcs between the bar and the envelope.

Cette barre 2 est équipée d'une borne de connexion 4, qui dépasse de sa face supérieure pour s'étendre perpendiculairement à cette barre 2 qui la supporte, vers le haut dans les figures.This bar 2 is equipped with a connection terminal 4, which protrudes from its upper face to extend perpendicular to this bar 2 which supports it, upwards in the figures.

Cette borne de connexion 4 dépasse de la portion inférieure 3 de l'enveloppe à travers une ouverture supérieure 6 de celle-ci.This connection terminal 4 protrudes from the lower portion 3 of the envelope through an upper opening 6 thereof.

L'extrémité supérieure 7 de cette borne 4 est entourée par un autre tronçon d'enveloppe étanche, repéré par 8, ayant une forme générale de tronc de cylindre, s'étendant perpendiculairement à la portion inférieure 3. Le bord inférieur 9 du tronçon d'enveloppe en tronc de cylindre 8 est ainsi fixé de manière étanche à l'ouverture 6.The upper end 7 of this terminal 4 is surrounded by another sealed casing section, identified by 8, having a general shape of a cylinder trunk, extending perpendicularly to the lower portion 3. The lower edge 9 of the section d The cylinder trunk shell 8 is thus sealingly attached to the opening 6.

Cette portion d'enveloppe en tronc de cylindre 8 se prolonge verticalement très au-delà de l'extrémité 7 de la borne 4. Elle porte à son extrémité supérieure 11 en forme de bord circulaire, un support 12 électriquement isolant, de forme ici généralement conique, qui maintient une électrode 13 s'étendant de part et d'autre de ce support 12. Ce support 12 peut comporter des ouvertures pour laisser passer le gaz isolant, ou bien être fermé pour constituer une barrière étanche permettant de compartimenter l'enveloppe du poste.This portion of cylinder trunk shell 8 extends vertically far beyond the end 7 of the terminal 4. It carries at its upper end 11 in the form of a circular edge, an electrically insulating support 12, of shape here generally conical, which maintains an electrode 13 extending on either side of the support 12. This support 12 may comprise openings for passing the insulating gas, or be closed to form a sealed barrier to compartmentalize the envelope of the post.

Cette électrode 13 s'étend dans le tronçon d'enveloppe 8 vers la borne 4, la borne 4 et l'électrode 13 ayant l'une et l'autre des formes de révolution. Elles s'étendent dans le prolongement l'une de l'autre, le long d'un axe AY normal à l'axe AX1, et elles ont leurs extrémité espacées l'une de l'autre dans la région centrale du tronçon d'enveloppe 8.This electrode 13 extends in the envelope section 8 to the terminal 4, the terminal 4 and the electrode 13 having both forms of revolution. They extend in the extension of one another, along an axis AY normal to the axis AX1, and they have their ends spaced apart from one another in the central region of the section of envelope 8.

L'extrémité libre 14 de l'électrode 13 fait ainsi face à l'extrémité libre 7 de la borne 4.The free end 14 of the electrode 13 thus faces the free end 7 of the terminal 4.

L'extrémité libre 14 de l'électrode 13 est équipée d'un contacteur électrique 16 mobile entre une position de connexion, comme dans la figure 2, où il s'étend dans l'espace séparant les extrémités 7 et 14 pour les relier électriquement l'une à l'autre, et une position de déconnexion, comme dans la figure 1, où il est replié pour laisser cet espace vide.The free end 14 of the electrode 13 is equipped with an electric switch 16 movable between a connection position, as in FIG. figure 2 , where it extends in the space between the ends 7 and 14 to electrically connect them to one another, and a disconnection position, as in the figure 1 where it is folded to leave this empty space.

Ce contacteur 16 comporte une extrémité qui est articulée sur l'extrémité 14 de l'électrode 13. Cette extrémité a une forme de chape double, comportant deux ailes 17 et 18 s'étendant de part et d'autre de la chape simple que constitue l'extrémité 14 de l'électrode 13.This contactor 16 has an end which is articulated on the end 14 of the electrode 13. This end has a double clevis shape, comprising two wings 17 and 18 extending on either side of the single clevis that constitutes the end 14 of the electrode 13.

Un bras de manoeuvre 19, formant aussi axe de rotation traverse les ailes de cette chape double et l'extrémité 14 en s'étendant selon une direction AX2 parallèle à l'axe AX1.An operating arm 19, also forming axis of rotation through the wings of this double clevis and the end 14 extending in a direction AX2 parallel to the axis AX1.

Ce bras rotatif 19 qui a une forme d'axe est rigidement solidarisé aux ailes de la chape double du contacteur mobile 16. Il constitue ainsi à la fois un axe d'articulation du contacteur mobile 16 sur l'électrode 13 et un organe de manoeuvre de ce contacteur mobile 16.This rotating arm 19 which has an axis shape is rigidly secured to the wings of the double yoke of the movable contactor 16. It thus constitutes both an axis of articulation of the movable contactor 16 on the electrode 13 and a maneuvering member of this mobile contactor 16.

Comme visible dans la figure 2, ce bras rotatif 19, fabriqué en matériau isolant, traverse une ouverture 21 du tronçon d'enveloppe 8 pour être accessible et actionnable depuis l'extérieur de l'enveloppe.As visible in the figure 2 this rotating arm 19, made of insulating material, passes through an opening 21 of the envelope section 8 to be accessible and operable from outside the envelope.

Un opérateur peut ainsi manoeuvrer le contacteur mobile interne 16 depuis l'extérieur, de sa position de connexion à sa position de déconnexion en faisant simplement tourner le bras 19 d'un quart de tour sur lui-même.An operator can thus maneuver the internal movable contactor 16 from the outside, from its connection position to its disconnected position by simply rotating the arm 19 by a quarter of a turn on itself.

Comme visible dans la figure 2, lorsque le contacteur mobile 16 est en position de connexion, il s'étend dans l'espace séparant la borne 4 et l'électrode 13 pour les réunir en les prolongeant. La borne avec l'électrode et le contact mobile 16 constituent alors un ensemble ayant globalement une forme de révolution autour de l'axe AY en étant situé à distance de l'enveloppe 8. De fait, il n'existe alors pas de risque d'amorçage d'un arc électrique.As visible in the figure 2 when the movable contactor 16 is in the connection position, it extends in the space separating the terminal 4 and the electrode 13 to join them together by prolonging them. The terminal with the electrode and the movable contact 16 then constitute an assembly generally having a shape of revolution about the axis AY being located at a distance from the envelope 8. In fact, there is no risk of ignition of an electric arc.

L'extrémité libre du contacteur 16 est pourvue d'une touche de contact 22, mobile en translation selon la direction principale du contacteur. Cette touche 22 est assujettie par un ressort de rappel tendant continuellement à la faire sortir pour qu'elle dépasse de l'extrémité libre du contacteur mobile 16.The free end of the contactor 16 is provided with a contact key 22, movable in translation along the main direction of the contactor. This key 22 is secured by a return spring continuously tending to pull it out so that it protrudes from the free end of the moving contactor 16.

Cette touche mobile assure qu'un contact franc s'établit en toute circonstance avec l'extrémité 7 de la borne 4, dès lors que le contacteur mobile 16 est placé en position de connexion comme dans la figure 2.This movable key ensures that a frank contact is established in all circumstances with the end 7 of the terminal 4, when the movable contactor 16 is placed in connection position as in the figure 2 .

Comme visible dans la figure 1, lorsque le contacteur mobile 16 est en position de déconnexion, il s'étend perpendiculairement à l'axe AY de la borne 4 et de l'électrode 13, de sorte que son extrémité libre est alors à faible distance de la surface interne du tronçon d'enveloppe 8.As visible in the figure 1 when the movable contactor 16 is in the disconnected position, it extends perpendicularly to the axis AY of the terminal 4 and the electrode 13, so that its free end is then at a short distance from the inner surface of the section envelope 8.

Mais comme le contacteur mobile 16 est porté par l'électrode 13 reliée à l'appareillage déconnecté et qui est à la terre y compris la phase de test, ce contacteur mobile 16 n'est alors pas sous tension, de sorte qu'il ne peut pas amorcer un arc électrique malgré sa faible proximité d'avec l'enveloppe 8. Durant une phase de test, c'est uniquement la borne 4 qui est sous une tension élevée.But as the movable contactor 16 is carried by the electrode 13 connected to the disconnected apparatus and which is grounded including the test phase, this mobile contactor 16 is not energized, so that it does not can not initiate an electric arc despite its low proximity to the envelope 8. During a test phase, it is only the terminal 4 which is under high voltage.

Comme indiqué plus haut, l'invention tire parti du fait qu'elle vise à permettre la déconnexion uniquement pour des phases de test, d'appareillages à faible courant qui sont à la terre y compris durant ces tests.As indicated above, the invention takes advantage of the fact that it aims to allow the disconnection only for test phases of low current devices that are grounded including during these tests.

L'éclisse selon l'invention constitue un organe de faibles dimensions pouvant être associé à tout appareillage à faible courant devant être déconnecté et qui est à la terre en phase de test du poste qu'il équipe.The splint according to the invention constitutes a small-sized member that can be associated with any low current switchgear to be disconnected and which is grounded in the test phase of the station it equips.

En pratique, le poste est conçu avec des éclisses selon l'invention pour chaque appareillage à faible courant devant être déconnecté et à la terre en phase de test.In practice, the station is designed with fishplates according to the invention for each low-current switchgear to be disconnected and grounded in test phase.

Ces éclisses sont ainsi manoeuvrées uniquement pour les phases de test préalables à la mise en service du poste, où elles sont ouvertes, et elles restent ensuite à demeure, fermées, pour tout le reste de la vie du poste isolé au gaz.These splints are thus maneuvered only for the pre-commissioning test phases of the substation, where they are open, and they then remain permanently closed for the rest of the life of the gas-insulated substation.

Dans ces conditions, les tests préalables à la mise en service d'un tel poste peuvent être mis en oeuvre beaucoup plus rapidement. Ces test nécessitent seulement d'ouvrir les éclisses selon l'invention et prévues à cet effet pour déconnecter les appareillages correspondants. Il n'est donc plus nécessaire de vidanger l'enveloppe pour démonter chaque appareillage à déconnecter avant de pouvoir reremplir l'enveloppe uniquement en vue des tests.Under these conditions, the tests prior to the commissioning of such a station can be implemented much more quickly. These tests require only to open the fishplates according to the invention and provided for this purpose to disconnect the corresponding equipment. It is therefore no longer necessary to drain the envelope to disassemble each device to be disconnected before the envelope can only be refilled for testing purposes.

Claims (5)

  1. Link plate for connection to a conductor bar (2) of a gas-insulated substation, a ground-connected low current device, where the said plate can be operated when it is not energised, to disconnect the device in preparation for an operational test phase on the substation, the said plate comprising:
    - an electrode (13) designed to be connected to the device, the said electrode (13) having a free end carrying a rotating moveable contactor (13) between a closed position, where it serves as an extension of the said electrode (13) to have its free end pressed against a terminal (4) of the conductor bar (2), and an open disconnected position where its free end is spaced apart from the area electrode (13) extension area carrying it;
    - a slidably mounted button (22) on the free end of the moveable contactor (16) with a spring that systematically returns the button (22) to an output position, for it to exert a proper support on the stationary contact (4) when the moveable contactor (16) is in the closed position;
    - a sealed envelope portion (8) surrounding the electrode and the moveable contact it carries;
    - an arm (19) connected to the moveable contactor (16) and creating a sealed passage through the envelope portion (8), such that it can be operated out of the said envelope in order to move the moveable contactor (16) from one position to another.
  2. Plate according to claim 1 further comprising a support (12) rigidly secured on to one end of the envelope portion (8) and the electrode (13) to support the said electrode.
  3. Plate according to any of claims 1 or 2, whereby the moveable contactor (16) is closer to the envelope (8) when it is the open position than when it is the closed position.
  4. Plate according to any of claims 1 to 3, whereby the arm (19) is connected to the moveable contactor (16) while being rigidly secured on to the said moveable contactor, and in which the said arm (19) extends following the rotation axis of the moveable contactor (16).
  5. Gas-insulated substation comprising at least one low current device, such as a voltage transformer or a lightning arrester, and in which the said device is connected to a conductor bar (2) in the substation through a plate, as described in one of claims 1 to 4.
EP15747112.9A 2014-07-24 2015-07-21 Clip for connecting a low-current device to a gas insulated substation allowing said device to be disconnected for an operational test phase of the substation Active EP3172753B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR1457135A FR3024294B1 (en) 2014-07-24 2014-07-24 CONNECTION CHECK TO A GAS INSULATED STATION OF A LOW-CURRENT EQUIPMENT FOR DISCONNECTING THIS EQUIPMENT FOR AN OPERATIONAL TEST PHASE OF THE POST
PCT/EP2015/066637 WO2016012444A1 (en) 2014-07-24 2015-07-21 Clip for connecting a low-current device to a gas insulated substation allowing said device to be disconnected for an operational test phase of the substation

Publications (2)

Publication Number Publication Date
EP3172753A1 EP3172753A1 (en) 2017-05-31
EP3172753B1 true EP3172753B1 (en) 2019-03-13

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Application Number Title Priority Date Filing Date
EP15747112.9A Active EP3172753B1 (en) 2014-07-24 2015-07-21 Clip for connecting a low-current device to a gas insulated substation allowing said device to be disconnected for an operational test phase of the substation

Country Status (3)

Country Link
EP (1) EP3172753B1 (en)
FR (1) FR3024294B1 (en)
WO (1) WO2016012444A1 (en)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2016169031A1 (en) * 2015-04-23 2016-10-27 Abb技术有限公司 Potential transformer isolating device and gas-insulated switchgear
DE102020200986B4 (en) * 2020-01-28 2023-05-11 Siemens Energy Global GmbH & Co. KG voltage converter

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
TWI228339B (en) * 2002-11-06 2005-02-21 Mitsubishi Electric Corp Metal-enclosed switchgear
JP5546338B2 (en) * 2010-04-30 2014-07-09 三菱電機株式会社 Gas insulated instrument transformer
DE102011007900A1 (en) * 2011-04-21 2012-10-25 Siemens Aktiengesellschaft Voltage transformer for a switchgear
JP5452555B2 (en) * 2011-08-29 2014-03-26 株式会社日立製作所 Switchgear and switchgear operating method

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
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Also Published As

Publication number Publication date
FR3024294A1 (en) 2016-01-29
EP3172753A1 (en) 2017-05-31
FR3024294B1 (en) 2018-04-06
WO2016012444A1 (en) 2016-01-28

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