JP2015220827A - Connection device of gas-insulated switchgear and stationary induction electric apparatus - Google Patents

Abstract

PROBLEM TO BE SOLVED: To allow for early recovery of the whole transmission and transformation apparatus after occurrence of an outage, by not only preventing up-sizing but also preventing leakage of oil from a connection device even upon occurrence of an outage, thereby reducing the risk of fire, or the like, and preventing expansion of damage to an adjacent gas-insulated switchgear and/or a stationary induction electric apparatus.SOLUTION: In a connection device of a gas-insulated switchgear and a stationary induction electric apparatus, a gas-insulated switchgear side connection container and a stationary induction electric apparatus side connection container are joined while partitioned by a spacer in connection container, and when the internal pressure of any one of the gas-insulated switchgear side connection container or the stationary induction electric apparatus side connection container increases over a predetermined value, a spacer in connection container is fixed so as to deviate from the gas-insulated switchgear side connection container or the stationary induction electric apparatus side connection container, the internal pressure of which increases over a predetermined value.

Description

  The present invention relates to a connection device between a gas-insulated switchgear and a static induction electrical device, and more particularly, to a device equipped with a mechanism that does not damage the gas-insulated switchgear and the static induction electrical device even if an accident occurs in the connection device. The present invention relates to a suitable gas-insulated switchgear and a connection device for static induction electrical equipment.

  There exists patent document 1 as a prior art document of the connection apparatus of a gas insulated switchgear and a static induction electrical apparatus. This patent document 1 has the following configuration for the purpose of reducing the size, simplifying, and reducing the cost of the connecting portion between the gas-insulated switchgear and the static induction electrical device.

  That is, the branch bus conductor that is the connection conductor of the gas-insulated switchgear and the branch bus container that accommodates the branch bus conductor are connected to the connection conductor of the stationary induction electrical device and the connection conductor storage container that accommodates it via the connection device. Yes. The connection conductor of the connection device and the connection container that accommodates the connection conductor are connected to the branch bus conductor and the branch bus container of the gas insulated switchgear via the gas / liquid partition insulation spacer, and the liquid / liquid partition insulation spacer. The connection conductor of the stationary induction electrical device and the connection conductor storage container are connected via The insulating spacer includes a central conductor portion that forms the periphery of the opening through which the conductor is inserted, and an insulating portion that is formed on the outer periphery thereof.

JP 2002-223509 A

  In the connection device for gas-insulated switchgear and stationary induction electrical equipment shown in the prior art, for example, when a ground fault occurs, the internal pressure of the connection device suddenly rises and is provided at the connection container and its end. Insulating spacers can break.

  There is a problem that the damage to the gas insulated switchgear and the stationary induction electrical equipment is so great that it takes a long time to recover, such as an oil leak from the connection container and the stationary induction electrical equipment due to the accident that the insulating spacer breaks, and fire.

  Also, when the internal pressure of the connection device suddenly increases, the oil storage tank is necessary because the internal insulating oil has been released to the oil storage tank (usually installed below the connection device). There is also a problem that the apparatus becomes larger.

  The present invention has been made in view of the above points. The object of the present invention is not to increase the size of the device, but also to prevent oil leakage from the connecting device even if an accident occurs, such as a fire. Gas-insulated switchgear and stationary induction that reduce fears and prevent damage to adjacent gas-insulated switchgear and / or stationary induction electrical equipment, enabling early restoration of the entire transmission and transformation equipment after an accident occurs It is to provide a connection device for electrical equipment.

  In order to achieve the above object, the gas insulated switchgear according to the present invention and the connection device for static induction electrical equipment have a gas insulated switchgear in which an insulating gas is sealed and a liquid insulating medium is sealed in the inside. A connection device for connecting a static induction electrical device, wherein the connection device houses a gas-insulated switchgear-side conductor connected to a conductor of the gas-insulated switchgear and a gas containing the conductor of the gas-insulated switchgear. A gas-insulated switchgear-side connection container that is connected to a container of an insulated switchgear and houses the gas-insulated switchgear-side conductor and is filled with an insulating gas; It is connected to a container of the static induction electrical device that houses a device side conductor and a conductor of the static induction electrical device, and houses the static induction electrical device side conductor and encloses the liquid insulating medium. The gas-insulated switchgear-side connection container and the stationary induction electric-device-side connection container are separated from each other by a connection container spacer and joined to each other, and the gas insulation When the internal pressure of either the switchgear-side connection container or the stationary induction electrical device-side connection container rises above a predetermined value, the connection container spacer causes the internal pressure to exceed the predetermined value. It is fixed so that it may come off from the gas insulated switchgear side connection container or the stationary induction electrical equipment side connection container that has been raised.

  According to the present invention, it is possible to prevent leakage of oil from the connecting device even if an accident occurs, as well as prevent the device from becoming large, reduce the risk of fire, etc. It is possible to prevent the damage to static induction electrical equipment from spreading and to quickly restore the entire transmission and transformation equipment after the accident occurs.

It is a figure which shows the outline of arrangement | positioning structure of the gas insulated switchgear employ | adopted for this invention, a static induction electrical apparatus, and a connection apparatus. BRIEF DESCRIPTION OF THE DRAWINGS It is sectional drawing which shows Example 1 of the connection apparatus of the gas insulated switchgear and static induction electrical equipment of this invention. It is sectional drawing of the connection part of the stationary induction electrical equipment side connection container and the spacer in a connection container in Example 1 of the connection apparatus of the gas insulation switchgear and stationary induction electrical equipment of this invention. It is sectional drawing which shows Example 2 of the connection apparatus of the gas insulated switchgear and static induction electrical equipment of this invention.

  Hereinafter, based on the illustrated embodiment, a connection device for a gas-insulated switchgear according to the present invention and a stationary induction electrical apparatus will be described. In each figure, the same symbols are used for the same components.

  FIG. 1 shows an outline of an arrangement configuration of a gas-insulated switchgear, a static induction electrical device, and a connection device employed in the present invention.

As shown in the figure, a gas insulated switchgear (hereinafter referred to as GIS) 1 in which an insulating gas (for example, SF ₆ gas) is sealed, and a liquid insulating medium (for example, insulating oil) are sealed in the interior. A stationary induction electrical device (for example, a transformer) 2 is connected via a connection device 7. The connection device 7 will be described with reference to FIG.

  As shown in FIG. 2, the connection device 7 includes a gas insulated switchgear side conductor (hereinafter referred to as a GIS side conductor) 13 connected to a GIS 1 conductor (hereinafter referred to as a GIS conductor) 3 and a GIS 1 that houses the GIS conductor 3. A gas-insulated switchgear-side connection container (hereinafter referred to as a GIS-side container) 12 that is connected to a container 4 (hereinafter referred to as a GIS container) 4, contains a GIS-side conductor 13 and is filled with an insulating gas, and a static induction electrical device 2 A stationary induction electrical device side conductor 11 connected to a conductor (hereinafter referred to as a static induction electrical device conductor) 5 and a stationary induction electrical device container (hereinafter referred to as a static induction electrical device container) that houses the static induction electrical device conductor 5. ), And a stationary induction electrical device side connection container 10 in which a static induction electrical device side conductor 11 is accommodated and an insulating oil is enclosed. The device-side connection container 10 is partitioned by the connection container spacer 14 and joined to each other. When the internal pressure of the stationary induction electrical device-side connection container 10 rises above a predetermined value, the device-side connection container 10 is connected. The in-container spacer 14 is fixed so as to be disengaged from the stationary inductive electrical equipment side connecting container 10 whose internal pressure has risen beyond a predetermined value.

Specifically, as shown in FIG. 3, the connection container spacer 14 is connected to the end flange portion of the stationary induction electrical device side connection container 10 via the adapter 16, and the adapter 16 is connected to the stationary induction electrical equipment. When the internal pressure of the device-side connection container 10 rises above a predetermined value, the internal pressure is fixed with a bolt 18 that is pulled out from the stationary induction electrical device-side connection container 10 that has risen above the predetermined value. Is. The connection container spacer 14 is fixed to the adapter 16 with a bolt 19. The GIS side connection container 12 is formed to have a diameter larger than the diameter of the stationary induction electrical device side connection container 10, and The spacer 14 is arrange | positioned so that it may become convex shape in the large diameter GIS side connection container 12. FIG.

  Further, the GIS container 4 and the GIS-side connection container 12 are partitioned by a gas-insulated switchgear-side spacer 9, and the static induction electrical device container 6 and the static induction electrical device-side connection container 10 are partitioned by a static induction electrical device-side spacer 8, respectively. The gas-insulated switchgear-side spacer 9 and the stationary induction electrical device-side spacer 8 are arranged so as to protrude toward the GIS 1 side.

  That is, in the present embodiment, the static induction electrical device conductor 5 and the static induction electrical device container 6 that houses the static induction electrical device conductor 5 are connected to the GIS conductor 3 that is a connection conductor of the GIS 1 and the GIS container 4 that stores the static electricity through the connection device 7. It is connected.

  Further, the connection device 7 is configured by joining the GIS side connection container 12 and the stationary induction electrical device side connection container 10 at a flange portion. A connection container spacer 14 is fixed to the end of the stationary induction electrical device side connection container 10. The connection container spacer 14 has a spacer conductor 17 at the center thereof, and the stationary induction electrical device side conductor 11 and the GIS side conductor 13 are connected to both sides thereof.

  The static induction electrical device side conductor 11 and the static induction electrical device side connection container 10 that houses the static induction electrical device side connection container 10 are connected to the static induction electrical device 2 via the static induction electrical device side spacer 8 at one end thereof. It is connected to the side conductor 5 and the stationary induction electrical device side container 6. Insulating oil is sealed in the stationary induction electrical device side container 6 and the stationary induction electrical device side connection container 10.

The GIS side conductor 13 and the GIS side connection container 12 that houses the GIS side conductor 13 are connected to the GIS conductor 3 and the GIS container 4 through the gas insulated switchgear side spacer 9 at one end thereof. Insulating gas such as SF ₆ gas is sealed in the GIS container 4 and the GIS side connection container 12.

  As shown in FIG. 2, the convex surfaces of the stationary induction electrical device side spacer 8 and the connection container spacer 14 are both arranged toward the GIS 1 side. If an accident occurs in the static induction electrical device side connection container 10 and the pressure in the static induction electrical device side connection container 10 rises, the spacer 14 in the connection container breaks to the convex side, and the static induction electrical device side connection container 10 The insulating oil in 10 is ejected to the GIS side connection container 12 side. Thereby, since the static induction electric equipment side spacer 8 escapes collapse, it becomes possible to protect the static induction electric equipment 2.

  In order to realize the above-described function, the connection container spacer 14 must be fixed to withstand the pressure in the stationary induction electrical device side connection container 10 during normal operation of the stationary induction electrical device 2. When an accident occurs in the induction electrical device side connection container 10 and the pressure in the static induction electrical device side connection container 10 rises above a predetermined value, the connection container spacer 14 is moved to the stationary induction electrical device side connection container 10. It must be constructed so as to be disengaged from the end of the.

  For this reason, in this embodiment, an adapter 16 is provided between the spacer 14 in the connection container and the end of the stationary induction electrical device side connection container 10, and the adapter 16 and the end of the stationary induction electrical device side connection container 10 are fixed. By adjusting the adapter 16 and the connection container spacer 14 so that they are weaker than those of the connection container spacer 14 (adjustment by changing the size and number of the bolts 18), the connection container spacer 14 becomes the end of the stationary induction electrical equipment side connection container 10 in the event of an accident. It can be configured to deviate from the above.

  When the spacer 14 in the connection container is removed from the end portion of the stationary induction electrical device side connection container 10 together with the adapter 16, the insulating oil inside the stationary induction electrical device side connection container 10 flows into the GIS side connection container 12. Thereby, since the static induction electric equipment side spacer 8 escapes destruction, it becomes possible to prevent the damage to the static induction electric equipment 2 from expanding.

  Further, by providing the adapter 16 between the end of the connection container spacer 14 and the stationary induction electrical device side connection container 10, even if the connection container spacer 14 is broken due to an accident, the stationary induction electrical device side connection container 10 The possibility that the end is affected can be reduced. This makes it possible to speed up the recovery of the equipment after the accident.

  Furthermore, since it is possible to prevent the insulating oil from being sprayed to the outside (in the air) of the stationary induction electrical device side connection container 10, it is possible to prevent a fire of the device.

On the other hand, contrary to the above-described configuration, the stationary induction electrical device side connection container 10 is disposed on the GIS 1 side, the GIS side connection container 12 is disposed on the stationary induction electrical device 2 side, and the convex surface of the spacer 14 in the connection container is stationary. Similar to protecting the stationary induction device 2 side by arranging the induction device 2 side, the SF ₆ gas in the GIS-side connection container 12 whose internal pressure has increased so that the connection container spacer 14 can be released is Since it flows into the apparatus side connection container 10, the gas pressure in the GIS side connection container 12 falls and it becomes possible to protect the GIS1 side.

  By adopting such a configuration of the present embodiment, it is not necessary to install an oil storage tank that allows insulating oil to escape even if the internal pressure of the connecting device suddenly rises, and of course, the device does not increase in size. Even if an accident occurs in the connection device, the connection container and the spacers on both ends of the connection device can be prevented from being destroyed, so it is possible to prevent oil leakage from the connection device, reduce the risk of fire, etc. It is possible to prevent the damage to the GIS and the static induction electrical device that are to be expanded. Therefore, after the accident occurs, it is possible to obtain an effect that enables early restoration of the entire transmission / transformation equipment.

  FIG. 4 shows a second embodiment of the connection device for a gas-insulated switchgear and stationary induction electrical apparatus according to the present invention.

  As shown in the figure, in this embodiment, a gap is formed in the axial direction in the connecting portion between the spacer conductor 17 passing through the connection container spacer 14 and the GIS side conductor 13 in order to absorb the pressure applied to the connection container spacer 14. A current collector 15 having an uneven structure is provided. Other configurations are the same as those of the first embodiment.

  With such a configuration of the present embodiment, when an accident occurs in the stationary induction electrical device side connection container 10 and the pressure in the stationary induction electrical device side connection container 10 increases, the connection container spacer 14 is Although the pressure is increased, the pressure is absorbed by the presence of the gap of the current collector 15 disposed between the spacer conductor 17 and the GIS side conductor 13, and the spacer 14 in the connecting container is easily subjected to the pressure.

  And if the spacer 14 in a connection container remove | deviates from the flange end part of the stationary induction electric equipment side connection container 10, the insulating oil which injected from the inside of the stationary induction electric equipment side connection container 10 will flow into the GIS side 12. As a result, the same effects as those of the first embodiment can be obtained, and further reliability can be ensured.

  In addition, this invention is not limited to an above-described Example, Various modifications are included. For example, the above-described embodiments have been described in detail for easy understanding of the present invention, and are not necessarily limited to those having all the configurations described. Further, a part of the configuration of one embodiment can be replaced with the configuration of another embodiment, and the configuration of another embodiment can be added to the configuration of one embodiment. Further, it is possible to add, delete, and replace other configurations for a part of the configuration of each embodiment.

  DESCRIPTION OF SYMBOLS 1 ... Gas insulated switchgear (GIS), 2 ... Static induction electrical equipment, 3 ... Gas insulated switchgear conductor (GIS conductor), 4 ... Gas insulated switchgear container (GIS container), 5 ... Static induction electrical equipment conductor, 6 DESCRIPTION OF SYMBOLS ... Static induction electrical equipment container, 7 ... Connection apparatus, 8 ... Static induction electrical equipment side spacer, 9 ... Gas insulation switchgear side spacer, 10 ... Static induction electrical equipment side connection container, 11 ... Static induction electrical equipment side conductor, 12 ... Gas-insulated switchgear-side connection container (GIS-side connection container), 13 ... Gas-insulated switchgear-side conductor (GIS-side conductor), 14 ... Spacer in connection container, 15 ... Current collector, 16 ... Adapter, 17 ... Spacer conductor, 18 ... bolt, 19 ... bolt.

Claims (7)

A connection device for connecting a gas-insulated switchgear in which an insulating gas is sealed inside and a static induction electrical device in which a liquid insulating medium is sealed inside,
The connection device is connected to a gas insulated switchgear side conductor connected to a conductor of the gas insulated switchgear and a container of the gas insulated switchgear that houses a conductor of the gas insulated switchgear, and the gas insulated switchgear A gas-insulated switchgear side connection container in which a side conductor is housed and filled with an insulating gas, a static induction electrical device side conductor connected to a conductor of the static induction electrical device, and a conductor of the static induction electrical device are accommodated A stationary induction electrical device side connection container that is connected to a container of the static induction electrical device, houses the static induction electrical device side conductor, and encloses the liquid insulating medium;
The gas-insulated switchgear-side connection container and the stationary induction electrical device-side connection container are separated from each other by a connection container spacer and joined together, and the gas-insulated switchgear-side connection container or the static induction electrical device When the internal pressure of any one of the side connection containers rises above a predetermined value, the connection container spacer causes the gas insulation switchgear side connection container where the internal pressure rises above a predetermined value. Alternatively, the connecting device for a gas-insulated switchgear and the stationary induction electrical device is fixed so as to be detached from the stationary induction electrical device side connection container. In the connection device of the gas insulated switchgear according to claim 1 and the static induction electrical device,
The connection container spacer is connected to the gas insulated switchgear-side connection container or the static induction electrical device side connection container via an adapter, and the adapter is connected to the gas insulated switchgear side connection container or the static induction electrical device. When the internal pressure of any one of the side connection containers rises above a predetermined value, the gas insulation switchgear side connection container or the stationary induction electrical equipment side where the internal pressure rises above a predetermined value A gas insulated switchgear and a stationary inductive electrical device connection device, characterized in that the gas insulated switchgear and the stationary induction electrical device are fixed with a bolt that comes off the connection container. The gas insulated switchgear according to claim 2 and a connection device for stationary induction electrical equipment,
The connecting device for a gas-insulated switchgear and a stationary induction electrical device, wherein the connection container spacer is fixed to the adapter with a bolt. In the connection apparatus of the gas insulated switchgear according to any one of claims 1 to 3, and a static induction electrical device,
The gas-insulated switchgear-side connection container is formed with a diameter larger or smaller than the diameter of the stationary induction electrical device-side connection container, and the connection container spacer has a large-diameter gas-insulated switchgear-side connection container or A connection device between a gas-insulated switchgear and a stationary induction electrical device, wherein the gas insulated switchgear and the stationary induction electrical device are arranged in a convex shape in the stationary induction electrical device side connection container. In the connection apparatus of the gas insulated switchgear according to any one of claims 1 to 4 and a stationary induction electrical device,
The gas-insulated switchgear container and the gas-insulated switchgear-side connection container are partitioned by a gas-insulated switchgear-side spacer, and the static induction electrical equipment container and the stationary induction electrical equipment-side connection container are partitioned by a static induction electrical equipment side spacer. And the gas-insulated switchgear and the static induction electrical device-side spacer are arranged so as to protrude toward the gas-insulated switchgear. Connection device for electrical equipment. In the connection apparatus of the gas insulated switchgear according to any one of claims 1 to 5 and a stationary induction electrical device,
A gas-insulated switchgear and stationary induction, characterized in that a collector that absorbs pressure applied to the spacer in the connection container is provided at a connection portion between the conductor passing through the spacer in the connection container and the gas-insulated switchgear side conductor. Connection device for electrical equipment. The gas insulated switchgear according to claim 6 and a connecting device for static induction electrical equipment,
The current collector has a concave-convex structure having a gap in the axial direction.

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