JPH08223716A - Gas-insulated switchgear - Google Patents

Abstract

PURPOSE: To provide an excellent gas-insulated switchgear whose arrangement constitution is simple and whose installation space can be reduced effectively. CONSTITUTION: Respective horizontal lead parts 1a at the upper part and the lower part of respective circuit breakers 101 to 104 are connected, via connecting buses 12, 13 extended to a direction perpendicular to the axial direction of the respective horizontal lead parts, to horizontal lead parts, at a higher order, which are installed at circuit breakers to be connected in the neighborhood. Grounding devices 2 for operations and disconnectors 3 for buses are connected, on the same axis as the respective horizontal lead parts, to the respective horizontal lead parts 1a at the upper part and the lower part. Ring-shaped buses are constituted of the respective circuit breakers 101 to 104, of the connecting buses 12, 13, of the grounding devices 2 for operations and of the disconnectors 3 for buses. Apparatuses 14, 16, for line connection,which constitute circuit units U1 to U4 are connected, on the same axis as the horizontal lead parts for the respective circuit breakers and on sides opposite to the respective circuit breakers by sandwiching the connecting buses, to the connecting buses.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a gas-insulated switchgear of a ring bus system used in electric stations such as power plants and substations.

[0002]

2. Description of the Related Art In recent years, it has been required to install an electric power plant in a factory area, a mountainous area, etc. due to soaring land and safety problems. Reduction of the site area of gas insulated switchgear,
There is a strong demand for miniaturization of components.

Among the single bus systems of such gas-insulated switchgear, the ring bus system is excellent in reliability of power supply because only the transmission line connected to the bus system needs to be stopped in the event of a bus accident. It has been mainly used in switchyards of power plants. FIG. 7 shows an example of a single wire connection diagram of the conventional gas insulated switchgear of the annular bus system. This gas-insulated switchgear is formed of a ring bus BUS and four line units U1 to U4 drawn from the bus.
Four circuit breakers 101 to 104 are connected to the annular bus bar so as to circulate in series, and a work grounding device 2 and a bus bar disconnector 3 are arranged on both sides of each circuit breaker.
Further, the four line units U1 to U4 are respectively drawn out between two busbar disconnecting switches 3 arranged between adjacent circuit breakers at right angles to the busbar axis direction. In each of the line units U1 to U4, a work grounding device 2, a line disconnecting switch 4 and a line grounding device 5 are sequentially connected and arranged as line-side drawing devices, and further connected to a line connecting cable head 6. There is.

8 to 11 show examples of arrangements of components in the conventional ring bus system applied to the single-line connection diagram of FIG. The same parts in the drawings are designated by the same reference numerals. Hereinafter, formation of the ring bus and the line unit will be described in order.

As shown in FIGS. 8 and 10, each circuit breaker 1 is provided with upper and lower horizontal lead-out portions 1a and 1b in the same plane in parallel and in the same direction, and four circuit breakers are provided. 1
Nos. 01 to 104 are arranged in series so that the horizontal lead-out portions are all parallel. Each of the horizontal lead-out portions is connected to a horizontal lead-out portion of the same level via a connecting busbar, and the upper horizontal lead-out portions 1a of the circuit breakers 101 and 102, 103 and 104, and the circuit breakers 101 and 104, 102 and 103, respectively. The lower horizontal lead-out portions 1b are connected to each other to form an annular bus bar.

The connection of the respective horizontal lead-out portions for constructing the annular bus bar is first performed by adjoining the horizontal lead-out portions, that is, the circuit breakers 101 and 102, the upper horizontal lead-out portions 1a of the circuit breakers 103 and 104, and the circuit breaker. The case of the lower horizontal lead-out portions 1b of 102 and 103 will be described. Since the connection structure is the same in each of the above parts, the upper horizontal lead-out portion 1 of the circuit breakers 101 and 102 will be described below.
The connection of a will be described as an example. As shown in FIG. 8, a cross-shaped breaker connecting branch busbar 7 is connected to each upper horizontal lead-out portion 1a, and a work grounding device 2 and a busbar disconnector are provided on the opposite side of the breakers 101 and 102. 3 are connected. Regarding the branch portion, a linear connecting bus bar 8 is connected to the circuit breakers 101 and 102 side, and a lid 7a is provided on the opposite side. A T-shaped cable head connecting branch busbar 9 is provided between the connecting busbars 8, and the branching portions are connected to circuit breakers 101, 1
It will be connected to the opposite side of 02.

Next, the circuit breaker 10 arranged at a distance.
The connection of the lower horizontal lead-out portions 1b of 1, 104 will be described. As shown in FIG. 9, each lower horizontal lead-out portion 1b
Is connected to a cross-type breaker connecting branch busbar 7, and the work grounding device 2 and the busbar disconnector 3 are connected to the opposite sides of the breakers 101 and 104. A connecting connection busbar 10 is connected to the branching portions of the branching busbar connecting busbars 7 on the side of the circuit breakers 101 and 104. In addition, this connecting bus bar 10 for communication
Is arranged so as to be located below each work grounding device 2, line disconnector 4 and line grounding device 5 arranged between circuit breakers 101 to 104. And the circuit breaker 10
At the branch portion located on the left side of the branch busbar connecting busbar 7 on the first side in the figure, a T-shaped cable head connecting branch busbar 9 is provided via a linear connecting busbar 8 and the branching portion is connected to the circuit breaker 101. ，
It is connected to the side opposite to 104. Also, the circuit breaker 10
A lid 7a is provided at the branch portion located on the right side of the branch busbar connecting branch busbar 7 on the fourth side.

On the other hand, as described above, the circuit breakers 101 to 1
Each of the line units U1 to U4 drawn out from the annular bus bar having 04 is connected to the circuit breakers 101 to 104 from the branch portion of the T-shaped cable head connecting branch bus bar 9 on the opposite side of the connecting bus bar and in the bus bar axial direction. It is pulled out at a right angle with respect to the branch busbar 9 as a device for pulling out the track side,
The work grounding device 2, the line disconnecting switch 4, and the line grounding device 5 are sequentially connected and arranged, and further, the line connecting cable head 6 is connected.

[0009]

In the conventional gas insulated switchgear of the annular bus bar type as described above, when an accident occurs in a part of the bus bars connected in an annular shape, the shutoffs located at both ends of the accident occurrence point are provided. Although it is excellent as a single bus system in that the range of accidents can be suppressed only by stopping the transmission line connected to the bus by pulling out the device, it has the following problems.

That is, the work grounding device 2 and the busbar disconnector 3 disposed on both sides of each of the circuit breakers 101 to 104 are connected to the upper and lower horizontal outlets via the cross-shaped circuit breaker connecting branch busbar 7. Since the circuit units are coaxially arranged, the line units U1 to U4 are pulled out from between the two adjacent circuit breakers. As a result, the distance L1 between the circuit breakers
(FIG. 8) becomes long, and there is a problem in that the overall arrangement configuration and installation space are increased in the circuit breaker arrangement direction (busbar axis direction). In addition, a connection bus bar 1 for connecting the lower horizontal lead-out portions 1b of the circuit breakers 101 and 104 to each other.
There is no choice but to say that the configuration arrangement of 0 is complicated, and there is a problem that the number of components is increased.

The present invention has been proposed to solve such conventional problems, and its main purpose is to:
It is an object of the present invention to provide an excellent gas-insulated switchgear of a ring-bus type gas-insulated switchgear that has a simple structure and can effectively reduce the installation space while maintaining reliability. That is, its specific purpose is to reduce the size between the circuit breakers to reduce the installation space in the busbar axial direction of the gas insulated switchgear, to reduce the number of connecting members, and to arrange the connecting members. Is to enable simplification.

[0012]

In order to achieve the above-mentioned object, the invention according to claim 1 has a plurality of vertical molds in which upper and lower horizontal projections are provided in parallel and in the same direction on the same plane. A circuit breaker, a ring busbar composed of a work grounding device connected to both sides of each circuit breaker and a busbar disconnector, and a line side line unit drawn out between the circuit breakers in the ring busbar. In the gas insulated switchgear having an annular busbar system, each of the upper and lower horizontal lead-out portions of each circuit breaker is connected next to each other via a connecting busbar extending in a direction orthogonal to the axial direction of each horizontal lead-out portion. Connected to the same level horizontal outlet provided in the circuit breaker, the work grounding device and the busbar disconnector coaxially connected to each of the upper and lower horizontal outlets, The ring mother To the connecting bus bar that constitutes the line unit, which is coaxial with either the upper or lower horizontal outlet of each circuit breaker and on the opposite side of each circuit breaker with the connecting bus bar in between, The equipment is connected.

According to a second aspect of the present invention, among the respective circuit breakers, the horizontal lead-out portions of adjacent circuit breakers are connected via a connecting bus bar extending in a direction orthogonal to the axial direction of each horizontal lead-out portion and in an oblique direction. , Connected to the horizontal outlets of different heights provided in the circuit breakers connected next to each other, and the horizontal outlets of the circuit breakers located at both ends of the plurality of circuit breakers are orthogonal to the axial direction of each horizontal outlet. Is connected to the horizontal lead portions of the same level via a connecting bus bar that extends in the direction of, and the work grounding device and the busbar disconnector are coaxially connected to each of the upper and lower horizontal lead portions. , A line unit is formed on the connecting busbar that constitutes the annular busbar, coaxially with one of the horizontal lead-out portions above and below each circuit breaker, and on the opposite side of each circuit breaker across the connecting busbar. The equipment for pulling out the track side is connected And said that you are.

[0014]

According to the first aspect of the present invention, the equipment constituting each line unit is arranged coaxially with the horizontal lead-out portion of each breaker, and between the breakers arranged adjacent to each other. Since it is not necessary to secure a space for connecting the line unit, it is possible to reduce the dimension in the busbar axis direction between the circuit breakers. Further, the structure and arrangement of the connecting member of the equipment for drawing out the track side are also simplified.

According to the second aspect of the present invention, as in the first aspect of the present invention, each circuit breaker is arranged by arranging the devices constituting each line unit coaxially with the horizontal lead-out portion of each circuit breaker. It is possible to reduce the interval between them. Further, in the invention of claim 2, since the horizontal lead-out portions of different heights of the adjoining circuit breakers are connected by the connecting bus bar extending in the oblique direction, the connection bus bar has the same connection form to each circuit breaker. All line units have the same layout configuration of the equipment for drawing out from the connection bus line.

[0016]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment in which a gas insulated switchgear of a ring bus system according to the present invention is applied to the single wire connection diagram of FIG. 7 will be specifically described below with reference to the drawings. In the figure, the same parts are designated by the same reference numerals and the description thereof will be omitted.

(1) First Embodiment A first embodiment shown in FIGS. 1 to 4 is a gas-insulated switchgear corresponding to claim 1 of the present invention. Hereinafter, a connection structure of annular busbars will be described first. As an example, the configuration arrangement of the four circuit breakers 101 to 104 is the same as that of the conventional example, but all the upper and lower horizontal lead-out portions 1a and 1b provided in the respective circuit breakers 101 to 104 have respective horizontal positions. A straight-type circuit breaker connecting bus bar 11 extending coaxially with the lead-out portion is connected, and the work grounding device 2, which is arranged in the order from the side of the circuit breaker 1 to the side thereof.
The busbar disconnectors 3 are coaxially arranged in a line. Further, each horizontal lead-out portion is similar to the conventional example, and the circuit breakers 101, 102, 103
And the upper horizontal lead-out portions 1a of 104 and the lower horizontal lead-out portions 1b of the circuit breakers 101 and 104 and 102 and 103 are connected.

The connection of the horizontal lead-out portions is first performed by adjoining the horizontal lead-out portions, that is, the circuit breakers 101 and 102.
Upper horizontal leads 1a of 103 and 104, circuit breaker 102
The case where the lower horizontal lead-out portion 1b of the circuit breakers 101 and 102 is the same will be described.
The connection will be described as an example. As shown in FIG. 1, a T-shaped cable head connecting branch busbar 13 is connected to the circuit breaker connecting busbar 11 connected to each upper horizontal lead-out portion 1a, and the branching portions are mutually circuit breakers. It is arranged toward the 101, 102 side. The T-shaped cable head connecting branch busbars 13 are connected to each other via a linear connecting busbar 12. Further, a lid 7a is provided on the opening 13a of the cable head connecting branch busbar 13 on the extension of the circuit breaker 102.

Next, the circuit breaker 10 arranged at a distance.
The connection of the lower horizontal lead-out portions 1b of 1, 104 will be described. As shown in FIG. 2, each lower horizontal lead-out portion 1b
A T-shaped cable head connecting branch busbar 13 is connected to the circuit breaker connecting busbar 11 connected to, and the branching portion is arranged downward. Then, the two branch portions are connected to each other via a connecting connection bus bar 15 having openings 15a at both ends. In addition, the opening 13 of the branch busbar 13 for connecting the cable head, which is an extension of the circuit breaker 101.
A lid 7a is provided on a.

The components of the line units U1 to U4 drawn from the ring bus thus constructed are as follows.
The breaker is connected to a T-shaped cable head connecting branch busbar 13 where the lid 7a is not provided in the opening 13a of each breaker. That is, the circuit breaker 101 is sandwiched from the branch busbars 13 for connecting cable heads located on the extensions of the upper horizontal lead-out portions 1a of the circuit breakers 101 and 103 and the lower horizontal lead-out portions 1b of the circuit breakers 102 and 104 with the annular busbar interposed therebetween.
It is pulled out on the side opposite to 104 and at a right angle to the direction of the generatrix axis. Then, to this cable head connecting branch busbar 13, a linear type cable head connecting busbar 14 and a line connecting cable head 6 which form a line unit are sequentially connected. The work grounding device 2, the line disconnecting switch 4, and the line grounding device 5 for the equipment for pulling out the track side are
The work grounding device 2 and the busbar disconnecting switch 3 are arranged on the side of the cable head connecting busbar 14 in the same coaxial line.

In this embodiment having the above-mentioned structure, the following operational effects can be obtained.

That is, the work grounding devices 2 and the busbar disconnecting switches 3 arranged on both sides of the circuit breaker 1 are arranged beside the linear circuit breaker connecting busbars 11 connected to the respective horizontal outlets. Since it is provided, the line connecting cable head 6 is arranged coaxially with the horizontal lead-out portion. Along with this, the work grounding device 2, the busbar disconnecting device 3, and the work grounding device 2, which is a device for drawing out the track side, the track disconnecting switch 4, and the track grounding device 5 are perpendicular to the busbar axis direction. It is arranged on the same plane. Therefore, the distance L2 (FIG. 1) between the circuit breakers is narrowed, and the distance in the busbar axis direction of the gas insulated switchgear can be reduced as compared with the conventional distance L1. Further, since it is possible to simplify the arrangement configuration of the connecting member connected to the horizontal outlet and reduce the connecting member, it is possible to reduce the size and simplification of the entire gas insulated switchgear and the installation space. . Furthermore, the circuit breakers 101 and 10 at both ends
The connecting connecting bus bar 15 for connecting the four may have a simple linear shape, and the configuration of the annular line portion can be simplified.

Further, in the figure, each lower horizontal lead-out portion 1b provided in each of the circuit breakers 101 and 104 has a T-shape with the opening 13a directed downward via the bus bar 11 for connecting the circuit breaker. A branch busbar 13 for connecting a cable head is connected.
Therefore, the connecting connection busbars 15 that connect the pair of openings 13a are arranged below the circuit breaker connecting busbars 11, and a linear member having an extremely simple structure can be used. Therefore, it is possible to facilitate and simplify the device connection and reduce the number of connecting members.

(2) Second Embodiment The present invention is not limited to the above-mentioned embodiment, but each shutoff arranged adjacent to each other as in the second embodiment shown in FIGS. 5 and 6. It is also possible to connect the upper horizontal lead-out portion 1a and the lower horizontal lead-out portion 1b provided on the container to form an annular bus bar.

First, the connection of the horizontal lead portions of different heights between the adjacent circuit breakers, that is, the lower horizontal lead portion 1b of the breaker 101, the upper horizontal lead portion 1a of the breaker 102, and the lower horizontal lead portion of the breaker 102 are connected. 1b and the upper horizontal lead-out portion 1a of the circuit breaker 103, and the lower horizontal lead-out portion 1b of the circuit breaker 103 and the upper horizontal lead-out portion 1a of the circuit breaker 104 are connected as follows. Since the connection structures are the same in each of the above parts, the connection between the lower horizontal lead-out portion 1b of the circuit breaker 101 and the upper horizontal lead-out portion 1a of the circuit breaker 102 will be described below as an example. The branch openings 13a of the cable head connecting branch busbars 13 connected to the respective horizontal lead-out portions via the circuit breaker connecting busbars 11 have the respective circuit breakers 10a.
It is arranged so as to face the 1,102 side. The openings 13a of the branch busbars 13 are different from each other provided in the circuit breaker connected next to each other via the connecting busbars 12 extending obliquely in a direction orthogonal to the axial direction of each horizontal outlet. It is connected to the high-level horizontal lead-out part.

Next, the connection between the upper horizontal lead-out portion 1a of the breaker 101 and the lower horizontal lead-out portion 1b of the breaker 104, which are arranged at both ends of the four breakers, will be described. Bus bar 11 for connecting the circuit breaker to each lower horizontal lead-out portion 1b
In the branch portion of the T-shaped cable head connecting branch busbar 13 connected via the, the branch portion on the side of the circuit breaker 101 is directed to the left side in the horizontal direction in the drawing, and the branch portion on the side of the circuit breaker 104 is below. Arranged in the direction. And each branch part is connected through the vertical and horizontal connecting connection bus 16 connected in L shape.

On the other hand, all the line units connected to the above-mentioned annular bus bar are drawn out from the cable head connecting bus bar 14 on the extension of the upper horizontal lead-out portion 1a, and the work grounding device 2, which is a line-side drawing device, The line disconnector 4 and the line grounding device 5 are the busbar 1 for connecting the cable head.
It is arranged at the side of 4.

In the second embodiment having such a structure,
It is possible to obtain the same effect as that of the first embodiment.
In addition, since all connections between adjacent circuit breakers have the same configuration, the equipment configuration can be made the same and simplified, and the arrangement of the line-side drawing equipment that constitutes the line unit is also the same for all line units. There is also the same advantage.
Further, the connecting bus bar 16 for connecting the circuit breakers 101 and 104 at both ends may be of a simple linear shape, and the configuration of the annular line portion can be simplified.

[0029]

As described above, according to the present invention, each device constituting the line unit is arranged on the horizontal lead-out shaft of each breaker with the connecting bus constituting the ring bus interposed therebetween. It is possible to reduce the distance between the vessels and simplify / reduce the connecting members. As a result, it is possible to provide an excellent gas-insulated switchgear that can contribute to downsizing and simplification of the entire apparatus and a reduction in installation space.

[Brief description of drawings]

FIG. 1 is a plan view of a first embodiment of the present invention.

FIG. 2 is a sectional view taken along arrow A in FIG.

3 is a sectional view taken along the arrow B in FIG.

FIG. 4 is a sectional view taken along arrow C in FIG.

FIG. 5 is a plan view of another embodiment of the present invention.

6 is a cross-sectional view taken along arrow D of FIG.

FIG. 7 is a single wire connection diagram of a conventional gas insulated switchgear of a ring bus system.

FIG. 8 is a plan view of a conventional gas insulated switchgear of a ring bus system.

9 is a sectional view taken along arrow X in FIG.

10 is a cross-sectional view taken along the arrow Y in FIG.

11 is a cross-sectional view taken along arrow Z in FIG.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 ... Circuit breaker 1a ... Upper horizontal lead-out part 1b ... Lower horizontal lead-out part 2 ... Work grounding device 3 ... Bus line disconnector 4 ... Line disconnector 5 ... Line grounding device 6 ... Line connection cable head 7 ... Breaker Branch bus bar for connection to equipment 8 ... Connection bus bar 9 ... Branch bus for cable head connection 10 ... Connection bus bar for connection 11 ... Bus bar for circuit breaker connection 12 ... Connection bus bar 13 ... Branch bus bar for cable head connection 13a ... Branch opening 14 ... Cable Head connecting busbars 15, 16 ... Connecting busbars for communication

Claims (2)

[Claims] 1. A plurality of vertical circuit breakers each having a horizontal lead-out portion parallel and in the same direction on the same plane above and below, and a work grounding device and a busbar connected to both sides of each circuit breaker. In a ring-bus type gas-insulated switchgear having a ring-side bus composed of a disconnecting switch and a line-side line unit drawn out between the circuit breakers in the ring-bus, above and below each of the circuit breakers. Each of the horizontal lead-out portions is connected to the same high-level horizontal lead-out portion provided in a circuit breaker connected next to the horizontal lead-out portion through a connecting bus bar extending in a direction orthogonal to the axial direction of each horizontal lead-out portion, A work grounding device and a busbar disconnector are connected to each of the horizontal outlets and the lower horizontal outlets coaxially, and the connecting busbars that form the annular busbar are either above or below each circuit breaker. One side On the opposite side of the connection bus and the horizontal lead section and coaxially with and each breaker, gas insulated switchgear, characterized in that the line-side drawer devices constituting the line units are connected. 2. A plurality of vertical circuit breakers each having a horizontal lead-out portion parallel and in the same direction on the same plane above and below, and a work grounding device and a busbar connected to both sides of each circuit breaker. In a ring-bus type gas-insulated switchgear having an annular bus bar composed of a disconnecting switch and a line side line unit drawn out between the circuit breakers in the annular bus bar, adjacent to each other The horizontal lead-out portions of the circuit breakers are different height horizontal lead-out portions provided in the circuit breakers that are connected next to each other via the connecting busbars that extend diagonally in the direction orthogonal to the axial direction of each horizontal lead-out portion. Of the plurality of circuit breakers, the horizontal outlets of the circuit breakers located at both ends are connected to the horizontal outlets of the same level through the connecting busbars extending in the direction orthogonal to the axial direction of each horizontal outlet, Above and below A work grounding device and a busbar disconnector are coaxially connected to each of the horizontal outlets of each of the horizontal outlets, and the connecting busbar that constitutes the annular busbar is either above or below each circuit breaker. 5. A gas-insulated switchgear, which is coaxial with the horizontal outlet and is on the opposite side of each circuit breaker with a connecting bus bar interposed between them and a line-side drawing device that constitutes a line unit.