EP3172753A1 - Eclisse de connexion à un poste isolé au gaz d'un appareillage à faible courant permettant de déconnecter cet appareillage pour une phase de test operationnel du poste - Google Patents
Eclisse de connexion à un poste isolé au gaz d'un appareillage à faible courant permettant de déconnecter cet appareillage pour une phase de test operationnel du posteInfo
- Publication number
- EP3172753A1 EP3172753A1 EP15747112.9A EP15747112A EP3172753A1 EP 3172753 A1 EP3172753 A1 EP 3172753A1 EP 15747112 A EP15747112 A EP 15747112A EP 3172753 A1 EP3172753 A1 EP 3172753A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- electrode
- contactor
- movable
- movable contactor
- substation
- 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
Links
Classifications
-
- 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 arrester ensures 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 certain 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.
- 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 off to disconnect the equipment for the purpose of an operational test phase of the substation, this splint comprising:
- this electrode intended to be connected to the apparatus, this electrode having a free end bearing 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 conductive bar and an open disconnection position in which its free end is spaced from the region extending the electrode 1 which carries it;
- 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 invention also relates to a splice as defined above, further comprising a slidingly mounted end free end of the movable contactor with a spring continuously reminding this key to an extended position so that it exerts a strong 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
- FIG. 1 is a view of the splice according to the invention according to a transverse sectional plane when electrically open;
- FIG. 2 is a view of the splice according to the invention according to a longitudinal sectional plane when electrically closed.
- 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.
- FIG. 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 operational tests prior to commissioning.
- This conducting bar 2 which here extends horizontally along an axis normal to the plane of FIG. 1, and which appears in FIG. 2, being indicated 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 prevent 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 section of sealed envelope, indicated by 8, having a general shape of a cylinder trunk, extending perpendicular 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. 2, where it extends in the space separating the ends 7 and 14 to connect them electrically. one to the other, and a disconnection position, as in 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, through an opening 21 of the casing section 8 to be accessible and operable from outside the 1 envelope.
- the movable switch 16 when the movable switch 16 is in the connection position, it extends into the space between the terminal 4 and the electrode 13 to join them by extending.
- 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 the connection position as in Figure 2.
- the mobile contactor 16 when the mobile contactor 16 is in the disconnected position, it extends perpendicular to the axis AY of the terminal 4 and the electrode 13, so that its free end is then at a short distance of the inner surface of the envelope section 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.
- pre-commissioning testing 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.
Landscapes
- Gas-Insulated Switchgears (AREA)
Abstract
Description
Claims
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| FR1457135A FR3024294B1 (fr) | 2014-07-24 | 2014-07-24 | Eclisse de connexion a un poste isole au gaz d'un appareillage a faible courant permettant de deconnecter cet appareillage pour une phase de test operationnel du poste |
| PCT/EP2015/066637 WO2016012444A1 (fr) | 2014-07-24 | 2015-07-21 | Eclisse de connexion à un poste isolé au gaz d'un appareillage à faible courant permettant de déconnecter cet appareillage pour une phase de test operationnel du poste |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| EP3172753A1 true EP3172753A1 (fr) | 2017-05-31 |
| EP3172753B1 EP3172753B1 (fr) | 2019-03-13 |
Family
ID=51659887
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP15747112.9A Active EP3172753B1 (fr) | 2014-07-24 | 2015-07-21 | Eclisse de connexion à un poste isolé au gaz d'un appareillage à faible courant permettant de déconnecter cet appareillage pour une phase de test operationnel du poste |
Country Status (3)
| Country | Link |
|---|---|
| EP (1) | EP3172753B1 (fr) |
| FR (1) | FR3024294B1 (fr) |
| WO (1) | WO2016012444A1 (fr) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP3288050B1 (fr) * | 2015-04-23 | 2021-11-10 | ABB Schweiz AG | Dispositif d'isolation de transformateur de tension et appareillage de commutation à isolation gazeuse |
| DE102020200986B4 (de) * | 2020-01-28 | 2023-05-11 | Siemens Energy Global GmbH & Co. KG | Spannungswandler |
Family Cites Families (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| TWI228339B (en) * | 2002-11-06 | 2005-02-21 | Mitsubishi Electric Corp | Metal-enclosed switchgear |
| JP5546338B2 (ja) * | 2010-04-30 | 2014-07-09 | 三菱電機株式会社 | ガス絶縁計器用変圧器 |
| DE102011007900A1 (de) * | 2011-04-21 | 2012-10-25 | Siemens Aktiengesellschaft | Spannungswandler für eine Schaltanlage |
| JP5452555B2 (ja) * | 2011-08-29 | 2014-03-26 | 株式会社日立製作所 | スイッチギヤ及びスイッチギヤの操作方法 |
-
2014
- 2014-07-24 FR FR1457135A patent/FR3024294B1/fr active Active
-
2015
- 2015-07-21 EP EP15747112.9A patent/EP3172753B1/fr active Active
- 2015-07-21 WO PCT/EP2015/066637 patent/WO2016012444A1/fr not_active Ceased
Also Published As
| Publication number | Publication date |
|---|---|
| EP3172753B1 (fr) | 2019-03-13 |
| WO2016012444A1 (fr) | 2016-01-28 |
| FR3024294B1 (fr) | 2018-04-06 |
| FR3024294A1 (fr) | 2016-01-29 |
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