JPH0965526A - Gas-insulated busbar device and gas-insulated switchgear - Google Patents

Abstract

(57) [Abstract] [Purpose] The length of the entire container including the container for containing the insulating gas and the conductor for three phases and the container for containing the conductor for one phase can be shortened. [Structure] A first outlet 40 is formed in a main container 38 that accommodates conductors for three phases and an insulating gas, and a pair of main outlets is formed at an end of the main container 38 in a direction orthogonal to the axis of the main container 38. The branch containers 34 and 36 are connected to each other, the second outlet 50 and the third outlet 52 are formed in the respective branch containers 34 and 36, and the conductors 44, 56 and 60 are drawn from the respective outlets. The first outlet 40, the second outlet 50, and the third outlet 52 are arranged at the positions of the vertices of an equilateral triangle. [Effect] The length of the entire container including the main container and the pair of branching containers can be shortened, and the installation area can be minimized.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a gas-insulated busbar device and a gas-insulated switchgear, and more particularly to a three-phase conductor housed in a metal container filled with an insulating gas at a substation or the like. The present invention relates to a gas-insulated busbar device and a gas-insulated switchgear that are suitable for use as a conductor for extracting a phase conductor.

[0002]

2. Description of the Related Art In recent years, when installing a substation or switchgear, it has become difficult to obtain land for the substation or switchgear, and many gas-insulated switchgears that require a small installation area have been adopted. That is, a disconnector, a circuit breaker, etc. are provided in the middle of the conductor lines for the three phases connected to the power plant, and when each conductor connected to these devices is connected to the tower, each conductor is simply connected to various devices. If they are connected, the insulation distance between the conductors for the three phases becomes large, and the installation area becomes large for wiring the conductors and arranging various devices. Therefore, the conductors for three phases are housed in a metal container filled with an insulating gas to reduce the insulation distance between the conductors and to reduce the installation area.

On the other hand, when each conductor is pulled out from the metallic container filled with the insulating gas through the bushing and connected to the steel tower, each conductor is exposed to the air, so that the air insulation distance between the conductors is increased. Only need to be separated. That is, the position of the bushing for pulling out each conductor is determined by the air insulation distance (phase distance). Therefore, in order to install a disconnector, a circuit breaker, etc., it is possible to reduce the installation area by housing each conductor in a metallic container filled with an insulating gas, but to install each conductor in a metallic container. When pulling out from
It is difficult to reduce the required air insulation distance, and there is a limit to reducing the installation area such as a substation.

Therefore, when each conductor is drawn out from the metallic container filled with the insulating gas through the bushing and connected to the steel tower, a plurality of branching containers are provided in the metallic container (main container) filled with the insulating gas. (Container filled with insulating gas) is connected in the horizontal direction, the outlets for the first to third phases are formed at equal intervals in this branching container, and conductors are drawn out from each outlet through bushings. A configuration has been proposed in which the installation area is reduced by setting the insulation distance between the conductors to approximately 2 L (L represents a distance corresponding to the air insulation distance between the two phases).

Further, as described in JP-A-4-88814, a first outlet is formed in the upper part of a metallic container filled with an insulating gas, and the first outlet is provided in the vicinity of the first outlet. A pair of first branching containers are connected in the horizontal direction, and second branching containers are connected in the vertical direction to the ends of each of the first branching containers to connect to each of the second branching containers. Second
Of the first and third outlets are arranged at the apexes of the triangle, and conductors are respectively drawn from the first to third outlets to reduce the installation area. A configuration is proposed.

[0006]

However, in the prior art, the first to third outlets are arranged linearly or at the positions of the vertices of a triangle. The length of the entire container including the gas-filled main container and the branching container becomes long, which is not sufficient to reduce the installation area.

An object of the present invention is to provide a gas-insulated bus bar device capable of shortening the overall length of a container including a container containing an insulating gas and three-phase conductors and a container containing one-phase conductors. And to provide a gas insulated switchgear.

[0008]

In order to achieve the above object, the present invention provides a main container for accommodating an insulating gas and conductors for three phases, and a first container formed in the middle of the main container. An outlet, a pair of branching containers connected to a position different from the first outlet of the main container and branched from the main container in a direction away from each other, and a second branching container formed in one branching container.
And a third outlet formed in the other branching container, and the first outlet, the second outlet, and the third outlet are arranged at equal intervals from each other. And a conductor for one phase is drawn out from each of the first outlet, the second outlet, and the third outlet via a bushing.

Further, according to the present invention, a disconnector which opens and closes a three-phase main bus in response to a switching command, a circuit breaker which disconnects the three-phase main bus in response to a disconnection command, and a three-phase main bus. Different from the main container that stores the conductors for three phases and the insulating gas that are respectively connected to the first container, the first outlet formed in the middle of the main container, and the first outlet of the main container. A pair of branching containers connected to the position and branched from the main container in a direction away from each other, a second outlet formed in one branching container, and a third branching container formed in the other branching container. A first outlet, a second outlet, and a third outlet are arranged at equal intervals from each other, and the first outlet, the second outlet, and the third outlet. A gas-insulated switchgear in which conductors for one phase are drawn out from the outlet through bushings Those were.

In constructing the gas insulated busbar device or the gas insulated switchgear, the following elements can be added.

(1) The pair of branching containers are branched from the main container in a direction orthogonal to the axis of the main container.

(2) The pair of branching containers are branched from the main container in a direction inclined with respect to the axis of the main container.

[0013]

According to the above-mentioned means, the first outlet is formed in the middle of the main container for accommodating the insulating gas and the conductors for three phases.
A pair of branching containers branched from the main container in a direction away from each other is connected to a position different from the first drawing port of the main container, and a second drawing port is formed in one of the branching containers and the other of the other is formed. A third outlet is formed in the branching container, the first outlet, the second outlet, and the third outlet are arranged at equal intervals, and one phase is provided from each outlet through a bushing. Since each conductor is drawn out, the outlets are arranged at the positions that form the vertices of an equilateral triangle, and the overall length of the container, including the main container and the branching container, can be shortened, and the installation area can be reduced. Can contribute to minimization.

[0014]

An embodiment of the present invention will be described below with reference to the drawings.

FIG. 1 is a plan view of an essential part of a gas-insulated switchgear showing an embodiment of the present invention.

In FIG. 1, the gas-insulated switchgear is a two-line gas-insulated switchgear installed in a substation and has a pair of main buses (three-phase conductors housed in a container) connected to a power plant. 2 lines of busbars 10 and 12, circuit breakers inserted in the middle of the main bus 10 (which shuts off the main bus 10 in response to a disconnection command) 14, 16 and 18, disconnectors (main bus 10 in response to a switching command) Those that can be opened and closed.) 20, 22, 24
And the like, and a gas-insulated busbar 32 is connected to the disconnectors 20, 22, and 24 via branch busbars 26, 28, and 30. A pair of phase-separated gas-insulated buses 34, 36 are connected to the gas-insulated bus bar 32. FIG.
In the above, reference numerals are given only to the components of one line.

The gas-insulated busbar 32 and the phase-separated type gas-insulated busbars 34, 36 are configured as a gas-insulated busbar device.
The gas-insulated bus bar 32 is a three-phase package type gas-insulated bus bar.
It is configured to include a cylindrical main container 38. Main container 3
Insulating gas is filled in 8 and conductors for three phases are stored. A first outlet 40 is formed in a circular shape in the middle of the main container 38, and a second outlet 40 is formed from the first outlet 40 via a bushing 42.
The conductor 44 of the phase (the phase arranged in the middle of the three phases) is drawn out (in the direction perpendicular to the paper surface).

On the other hand, on the end side of the gas-insulated bus bar 32, phase-separated type gas-insulated bus bars 34 and 36 are connected so as to face each other. That is, a pair of branching containers 46 and 48 are connected to the end portion side of the main container 38 in a direction orthogonal to the axis of the main container 38. Each of the branching containers 46 and 48 is filled with an insulating gas and contains one-phase conductor. A second outlet 50 is formed in a circular shape on the end side (tip side) of the branching container 46, and a third outlet 52 is formed in a circular shape on the end side of the branching container 48. There is.
First outlet 40, second outlet 50, third outlet 5
2 are arranged at equal intervals. That is, the first outlet 40, the second outlet 50, and the third outlet 52 are arranged so as to maintain the air insulation distance L, and the outlets 40, 50, and 52 are the vertices of an equilateral triangle. Is formed in position.

The first-phase conductor 56 is drawn from the second outlet 50 through the bushing 54, and the third-phase conductor 60 is drawn from the third outlet 52 through the bushing 58. ing. Each of the conductors 56 and 60 is connected to a steel tower through an insulator (not shown).

According to this embodiment, the first outlet 40 is formed in the main container 38, and the branching container 4 is provided at the end of the main container 38.
6, 48 are connected to each other, a second outlet 50 and a third outlet 52 are formed in the branching vessels 46, 48, respectively, and conductors 44, 56, 60 are drawn out from the respective outlets, and first outlets are formed. Four
0, the second outlet 50, and the third outlet 52 are formed at positions that maintain the air insulation distance L, respectively, and the outlets 40, 5
Since 0 and 52 are respectively formed at the positions of the vertices of an equilateral triangle, the bus bar including the three-phase collective type gas insulated bus bar 32 and the phase separation type gas insulated bus lines 34 and 36, that is, the main container 4
0, the length of the entire container including the branching containers 46 and 48 can be shortened, which can contribute to the minimization of the installation area.

Next, another embodiment of the present invention will be described with reference to FIG.

In this embodiment, the gas-insulated bus bar 32 shown in FIG. 1 is used.
And shortens the overall length of the gas-insulated busbar 32 at the end (the end of the main container 38) of the first outlet 40.
And the phase-separated gas-insulated buses 34, 36 are connected to the main container 38 at a position different from the first outlet 40 in a direction inclined with respect to the axis of the main container 38. Since other configurations are the same as those in the above-mentioned embodiment, the same or corresponding parts as those in the above-mentioned embodiment are designated by the same reference numerals, and their description will be omitted.

According to this embodiment, the first outlet 40 is formed in the main container 38, and the branching container 4 is provided at the end of the main container 38.
6, 48 are connected to each other, a second outlet 50 and a third outlet 52 are formed in the branching vessels 46, 48, respectively, and conductors 44, 56, 60 are drawn out from the respective outlets, and first outlets are formed. Four
Since 0, the second outlet 50, and the third outlet 52 are formed at positions that maintain the air insulation distance L (the outlets 40, 50, and 52 are the positions of the vertices of regular triangles), The length of the bus bar including the three-phase batch type gas insulated bus bar 32 and the phase separation type gas insulated bus lines 34 and 36, that is, the entire container including the main container 40 and the branching containers 46 and 48 can be shortened, and the installation area can be reduced. Can contribute to the minimization of

In the present embodiment, the total length of the main container 38 can be made shorter than that of the previous embodiment.

In the present embodiment, when connecting the branching containers 46 and 48 to the main container 38, the main container 38
It is possible to adopt a structure in which a branching case having the same diameter as that of the main container 38 is connected to the end of the branching container and the branching cases are used as the branching containers 46 and 48. Furthermore, the main container 38
It is also possible to adopt a structure in which the first outlet 40 is formed midway and the branching containers 46 and 48 having a smaller diameter than the main container 38 are connected to the tip end side of the main container 38. When the former structure is adopted, the diameter of the branching case (branching container) is large, so the work is easier than the latter case.

Further, in each of the above-mentioned embodiments, since the intermediate phase (second phase) of the three phases is drawn out first, the drawing operation is easier than the structure in which the other phases are drawn out first. Becomes

[0027]

As described above, according to the present invention,
A first outlet is formed in the main container that stores the conductors and insulating gas for three phases, a pair of branching containers are connected to the ends of the main container, and a second outlet is provided in each of the branching containers. A third outlet is formed, a conductor is led out from each outlet, and the first outlet, the second outlet, and the third outlet are placed at positions where the distances between the outlets are equal to each other. Since they are arranged, the length of the entire container including the main container and the pair of branching containers can be shortened, which can contribute to the minimization of the installation area.

[Brief description of drawings]

FIG. 1 is a plan view showing a main configuration of a gas insulated switchgear according to an embodiment of the present invention.

FIG. 2 is a plan view showing a main configuration of a gas-insulated switchgear according to another embodiment of the present invention.

[Explanation of symbols]

 10, 12 Main busbars 14, 16, 18 Circuit breakers 20, 22, 24 Disconnectors 32 Three-phase batch gas-insulated busbars 34, 36 Phase-separated type gas-insulated busbars 38 Main vessel 40 First outlet 44 Conductor 46, 48 Branch Container 50 second outlet 52 third outlet 56, 60 conductor

Claims (6)

[Claims] 1. A main container for accommodating an insulating gas and conductors for three phases, a first outlet formed in the middle of the main container, and a first outlet of the main container are different from each other. A pair of branching containers connected to the position and branched from the main container in a direction away from each other, and a second branching container formed on one of the branching containers
And a third outlet formed in the other branching container, and the first outlet, the second outlet, and the third outlet are arranged at equal intervals from each other. A gas-insulated bus bar device in which conductors for one phase are respectively drawn from the first outlet, the second outlet, and the third outlet via bushings. 2. The gas-insulated bus bar apparatus according to claim 1, wherein the pair of branching containers are branched from the main container in a direction orthogonal to the axis of the main container. 3. The gas-insulated bus bar device according to claim 1, wherein the pair of branching vessels are branched from the main vessel in a direction inclined with respect to the axis of the main vessel. 4. A disconnecting switch for opening and closing a three-phase main bus in response to a switching command, a circuit breaker for disconnecting a three-phase main bus in response to a disconnection command, and a three-phase main bus respectively connected to the disconnecting switch. And a main container accommodating the three-phase conductors and insulating gas, a first outlet formed in the middle of the main container, and a position different from the first outlet of the main container. A pair of branching containers branched from the main container in a direction away from each other, a second outlet formed in one branching container, and a third outlet formed in the other branching container. Comprises the first
Of the first outlet, the second outlet and the third outlet are arranged at equal intervals from each other, and one phase is formed from the first outlet, the second outlet and the third outlet through a bushing. A gas-insulated switchgear in which each minute conductor is drawn out. 5. The gas-insulated switchgear according to claim 4, wherein the pair of branching containers are branched from the main container in a direction orthogonal to the axis of the main container. 6. The gas-insulated switchgear according to claim 4, wherein the pair of branching containers are branched from the main container in a direction inclined with respect to the axis of the main container.