JPH10271625A - Gas-insulated switchgear - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a gas-insulated switchgear capable of decreasing the installation space for the whole of equipment by adequately arranging the main bus and bushing. SOLUTION: A first group is organized by 6 circuits of line circuit 11 and 4 circuits of transformer circuit 14, and a second group is organized by 4 circuits of line circuit 11, and 1 circuit respectively for a bus communicating circuit 18 and a bus grounding circuit 19. For each group, a line connecting a dead-end tower, a line connecting a bushing 13 for overhead lead-in wire and the main buses 10a, 10b for gas-insulated switchgear are arranged in parallel to each other. Each circuit of a line circuit 11, a transformer circuit 12, each circuit of bus and each circuit of bus grounding circuit 19 are arranged in a direction perpendicular to the main buses 10a, 10b. A line connecting the dead-end tower 17 in each group is arranged with a predetermined angle, and the main buses 10a, 10b are connected with gas-insulated buses 10c, 10d.

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 in which a charging section is formed in a container filled with an insulating gas, and more particularly to a gas insulated switchgear having an improved arrangement. .

[0002]

2. Description of the Related Art Heretofore, there has been known a gas-insulated switchgear in which a high-pressure conductor is housed in a pressure vessel filled with an insulating medium such as SF ₆ gas. This gas insulated switchgear does not expose the charged part like the conventional air-insulated switchgear, and can achieve excellent insulation and arc-extinguishing performance by SF ₆ gas in the pressure vessel. It has the advantages of being easy to simplify and simplify, and having little effect on the outside, so that it is easy to secure safety and perform maintenance and inspection.

A gas insulated switchgear having these advantages is:
Land availability for power plant and substation construction due to soaring land prices,
Demand is on the rise and can be applied to most switchgears, as they can address the issues of recent importance, such as environmental harmony with surrounding areas.

Conventionally, such a gas insulated switchgear has been described below with reference to FIGS. 22 to 25 are plan views of the gas insulated switchgear. First, FIG. 22 shows a first arrangement example of a conventional gas insulated switchgear. In this arrangement example, the gas insulated switchgear 200 is constituted by a double bus,
Reference numeral 1 denotes six lines, which are connected to the overhead transmission line via a bushing 203. The transformer line 202 has four lines, and is connected to the transformer via a cable head 204 by a voltage cable. The bushing 203 for anchoring and connecting the overhead transmission line is arranged on substantially the same straight line so as to secure an air insulation distance.
Are connected by a gas-insulated bus 205.

Next, FIG. 23 shows a second arrangement example of a conventional gas insulated switchgear. This arrangement example is the same as the first arrangement example except that the gas insulated switchgear 200 and the transformer 206 are connected not by a power cable but by a gas insulated bus. FIG. 24 shows a third arrangement example of the conventional gas insulated switchgear. In this arrangement example, the bushings 203 are arranged not on the same straight line but on the vertices of a triangle, and the gas connection bus 205 connecting the line 201 and the bushing 203 is shortened. Further, FIG.
Is a fourth arrangement example of the conventional gas insulated switchgear. In this arrangement example, the anchoring tower 207 and the bushing 203 are not all arranged on the same straight line, but are divided into two groups and arranged so that each group has a predetermined angle.

[0006]

By the way, the above gas insulated switchgear is expected to be further compact in order to make full use of the above advantages, but is connected to the gas insulated switchgear. As mentioned above, most of the substation line circuits are still air-insulated overhead transmission lines. For this reason, in order to secure a considerable insulation distance between the overhead transmission lines, it is necessary to provide a sufficient interval between the anchoring points of the overhead transmission line such as a bushing.

However, the connection between the anchoring point of the overhead power transmission line and the gas insulated switchgear must be performed by a gas insulated busbar or the like. The installation space of the whole apparatus becomes large. In particular, when it comes to a large-scale substation, the configuration and arrangement of gas-insulated buses for connection become complicated, not only the connection buses and the like become longer, but also the ratio of the gas-insulated switchgear to the total area of the substation increases. .

For example, in the example of the gas insulated switchgear shown in FIG.
Although the switching equipment group of No. 0 is compact and the arrangement space is reduced, the bushing 203 for connecting the overhead power transmission line is placed on a substantially same straight line with a long distance in order to secure an air insulation distance. Are located. Therefore, not only is the entire installation space not compact,
In order to connect the bushing 203 and the gas-insulated switchgear 200, a long gas-insulated bus 205 is required.
And in the case of the second arrangement example, the gas insulated switchgear 2
00 is compact, but the gas-insulated bus 205
In addition, the arrangement of the transformer 206 is not made compact, a long gas-insulated bus 205 is required for connection, and the arrangement space is large.

In the case of the third arrangement example, the line circuit 2
01 and the gas connection bus 20 connecting the bushing 203
5, the space in the longitudinal direction of the main bus of the gas insulated switchgear 200 is reduced, but the space in other directions is not reduced. Further, in the case of the fourth arrangement example,
Rather than disposing all bushings 203 on the same straight line,
Although the space in the longitudinal direction of the main bus of the gas insulated switchgear 200 is reduced, the gas insulated bus 205 is still long due to the extended connection to the bushing 203 having different angles.
And a large installation space for that is required.

The present invention has been proposed to solve the above-mentioned problems of the prior art, and an object of the present invention is to reduce the installation space of the entire apparatus by properly arranging the main bus and the bushing. It is to provide a gas insulated switchgear.

[0011]

In order to achieve the above object, the present invention provides a gas insulated switchgear in which a plurality of bushings connected to an overhead power transmission line are connected to a main bus via a transmission line. Has the following technical features.

That is, according to the first aspect of the present invention, the bushings are separately arranged on two or more straight lines in different directions, and two or more bushings are arranged so that the main bus lines are parallel to the respective bushing arrangement directions. They are arranged in groups, and the main buses in adjacent groups are connected to each other by connection conductors. According to the first aspect of the present invention, since the main buses are divided into two or more groups and arranged at different angles, the installation space in the longitudinal direction of the main buses can be saved. Further, in each group, since the main bus is arranged in parallel with the bushing, the distance between the main bus and the bushing does not increase, and the transmission line can be shortened.

According to a second aspect of the present invention, in the gas insulated switchgear of the first aspect, the connection conductor is constituted by a gas insulated bus. According to the second aspect of the present invention, since the gas-insulated bus is used as the connecting conductor for connecting the main buses of the adjacent groups, the insulation performance and safety are improved.

According to a third aspect of the present invention, in the gas insulated switchgear according to the first aspect, the connection conductor is constituted by a power cable. According to the third aspect of the present invention, since the power cable is used as the connection conductor for connecting the main buses of the adjacent groups, the power cable can be configured at low cost and the connection operation can be easily performed. Can be.

According to a fourth aspect of the present invention, the bushings are arranged on the same straight line and divided into two or more groups at intervals determined by an insulation separation distance, and the main bus bar is arranged in parallel with the arrangement direction of the bushings. The main buses in adjacent groups are coaxially extended and connected by a connecting conductor. In the invention described in claim 4 as described above, the main bus bar is arranged in parallel with the bushing and corresponding to each group.
The distance between the main bus and the bushing does not increase, and the transmission line can be shortened.

According to a fifth aspect of the present invention, the bushings are arranged in two or more groups on the same straight line and at intervals determined by an insulation separation distance, and at least two groups are provided at adjacent ends of the bushings. The transmission line in a direction orthogonal to the bushing is connected in parallel and close to each other. According to the fifth aspect of the present invention, since the transmission lines in the adjacent groups are closely arranged in parallel, the length of the main bus connected to the transmission lines can be reduced.

According to a sixth aspect of the present invention, in the gas insulated switchgear according to the fourth or fifth aspect, the main bus and a transformer line in a direction orthogonal to the main bus are connected via a gas insulated bus. It is characterized by having been done. According to the sixth aspect of the invention, it is possible to improve the insulation performance and safety by using the gas insulated busbar, in addition to the same operation as the gas insulated switchgear according to the fourth or fifth aspect. .

According to a seventh aspect of the present invention, in the gas insulated switchgear according to the fourth or fifth aspect, the main bus and a transformer line in a direction orthogonal to the main bus are connected via a power cable. It is characterized by having. According to the seventh aspect of the present invention, the same operation as the gas insulated switchgear according to the fourth or fifth aspect is achieved, and further, the connection operation is simplified by using the power cable and the manufacturing cost is reduced. Can be.

The invention according to claim 8 is characterized in that the bushing and the transmission line are connected via a gas-insulated transmission line. In the above-described invention, the gas-insulated transmission line having a smaller tank diameter than the gas-insulated bus is used for the connection between the bushing and the transmission line. For this reason, the amount of the insulating gas and the material of the tank and the conductor can be reduced, and the total weight and the total installation area are reduced.

According to a ninth aspect of the present invention, the bushings are arranged on two or more straight lines parallel to each other, and the bushings are grouped into two or more groups so that the main bus lines are parallel to the respective bushing arrangement directions. Main buses in adjacent groups are arranged separately and connected by gas-insulated buses. In the invention according to the ninth aspect, the bushings and the main bus divided in a plurality of groups are arranged in parallel, so that the distance between the bushing and the main bus in each group does not increase. , Transmission lines can be shortened. Further, since a gas-insulated bus is used as a conductor for connecting the main bus between adjacent groups, insulation characteristics and safety are improved.

According to a tenth aspect of the present invention, the bushings are separately arranged on two or more straight lines parallel to each other, and the bushings are grouped into two or more groups so that the main bus lines are parallel to the respective bushing arrangement directions. Main buses in adjacent groups are arranged separately and connected by a power cable. Claim 1 as described above
In the invention described in Item 0, the bushings divided into a plurality of groups and the main bus are arranged in parallel, so that the same effect as the invention described in Claim 9 is exerted. In addition, since a power cable is used as a conductor for connecting the main bus between adjacent groups, it can be configured at a lower cost than when a gas-insulated bus is used, and the connection work can be performed easily. Can be.

According to an eleventh aspect of the present invention, the main bus is provided in a U-shape, and the bushings are separately arranged on straight lines parallel to respective sides of the U-shape of the main bus. It is characterized by being. Claim 1 as described above
In the invention described in 1 above, since the main bus is formed in a U-shape, the space in the longitudinal direction of the main bus can be reduced as compared with the case where the main bus is formed on a straight line. In addition, since the bushing is arranged parallel to each side of the U-shaped main bus, the distance between the bushing and the main bus does not increase, the length of the transmission line can be shortened, and the installation space is reduced. , Cost savings and renovation times can be reduced.

According to a twelfth aspect of the present invention, the main bus is provided in the shape of a knot, and the bushings are separately arranged on straight lines parallel to respective sides of the knot of the main bus. It is characterized by being. Claim 1 as described above
In the invention described in the second aspect, the main bus is formed in the shape of a work, so that the space in the longitudinal direction of the main bus can be reduced as compared with the case where the main bus is formed on a straight line. In addition, since the bushing is arranged in parallel with each side of the main bus in the shape of the k-shape, the distance between the bushing and the main bus does not increase, and the length of the transmission line can be shortened.
Installation space can be reduced, costs can be saved, and repair time can be reduced.

According to a thirteenth aspect of the present invention, the main bus is T
, And the bushing is connected to the T of the main bus.
Are arranged separately on a straight line parallel to each side of the character. Claim 1 as described above
In the invention described in 3, the main bus is formed in a T shape, so that the space in the longitudinal direction of the main bus can be reduced as compared with the case where the main bus is formed on a straight line. Further, since the bushing is arranged in parallel with each side of the T-shaped main bus, the distance between the bushing and the main bus does not increase, and the length of the transmission line can be shortened.
The installation space can be reduced, costs can be saved, and repair time can be reduced.

[0025]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Embodiments of the gas insulated switchgear of the present invention will be described below with reference to the drawings.

(1) First Embodiment One embodiment corresponding to the invention described in claim 1 is described as a first embodiment.
An embodiment will be described below with reference to FIGS.

(Configuration) First, the configuration of the present embodiment will be described. FIG. 1 shows an example of a single-line diagram of the present embodiment according to the double bus system shown below.
Is a plan view of the present embodiment. That is, as shown in FIG. 1 and FIG.
There are 0 lines, 4 transformer lines 12, and 1 bus connection line 18 and 1 ground line 19. These are arranged in two groups. That is, in the first group, the line line 11 has six lines and the transformer line 14 has
In the second group, the line line 11 is composed of four lines, the bus connecting line 18 and the bus ground line 19 are each composed of one line.

The lines connecting the retaining towers 17 in each group, the lines connecting the bushings 13 for drawing in overhead lines, and the main buses 10a, 10b of the gas insulated switchgear.
Are arranged in parallel with each other. Each of the line line 11, the transformer line 12, the bus line, and the bus ground line 19 is arranged in a direction orthogonal to the main bus lines 10a and 10b of the gas insulated switchgear. The lines connecting the retaining towers 17 of the first group and the second group (main buses of the gas-insulated switchgear) are arranged at a predetermined angle that is neither parallel nor orthogonal to each other. Furthermore, the main buses 10a and 10b between the two groups are
c, 10d.

Next, the arrangement of the components in the gas insulated switchgear of the present embodiment will be described below with reference to FIGS. 3 is a line circuit, FIG. 4 is a transformer line,
FIG. 5 is a side view of a bus connecting line, FIG. 6 is a side view of a bus grounding line, and FIG. 7 is a side view of a bushing for retaining an overhead line.

First, as shown in FIG. 3, in the line circuit, bus disconnectors 152a, 152b are provided above main buses 151a, 151b installed horizontally and parallel to the installation surface.
152b, a grounding switch 153 are arranged, and a circuit breaker 154 whose operation axis is arranged perpendicular to the installation surface is connected via a current transformer 155. And circuit breaker 1
Reference numeral 54 is connected to a gas-insulated bus 158 for connection to a bushing via a current transformer 155, a disconnector grounding switch 156, and an instrument transformer 157.

Next, as shown in FIG. 4, in the transformer circuit, the main buses 151a, 151b to the current transformer 155 are the same as the line circuit, but the current transformer 155 is connected to the ground switch 159, the lightning arrester. 160 and a cable head 161 in this order, and are connected to a transformer by a power cable.

As shown in FIG. 5, in the bus connecting line, a bus disconnector 152 is provided above main buses 151a and 151b installed horizontally and parallel to the installation surface.
a, 152b, and a grounding switch 153 are arranged, and current transformers 155 are arranged up and down via a horizontal connection bus. Each current transformer 155 has an operation axis perpendicular to the installation surface, and is connected to two connection ports of the circuit breaker 154.

As shown in FIG. 6, in the bus ground line, two main buses 151a and 151b are connected to a ground switch 159 and a bus transformer 157 via a connection bus. . Further, as shown in FIG. 7, a gas-insulated bus 158 from the line is arranged and connected to the bushing 162. Gas insulated bus is 3
Although the phases are collective, the bushing has a phase separation structure since it is necessary to insulate each phase. A lightning arrester 160 is arranged below the bushing 162.

(Operation and Effect) The operation and effect of the present embodiment having the above configuration are as follows. That is,
Since the bushings 13 for retaining the overhead power transmission lines are divided into first and second groups and are arranged at different angles, the same as in the fourth arrangement example shown in FIG. Can be reduced. Since the main buses 10a and 10b of the gas insulated switchgear are divided and arranged at different angles in parallel with the bushings 13 arranged in a divided manner, the bushings 13 in the first and second groups are separated from the gas insulated switchgear. The distance between the main buses 10a and 10b of the device does not increase.

Therefore, the bushing 13 and the main bus 10a,
10b, the length of the gas-insulated bus 15 connecting to the gas-insulated switchgear can be reduced, and the distance between the retaining tower 17 and the gas-insulated switchgear can be shortened. The installation space can be greatly reduced,
Transportation work and on-site assembly work are easy and manufacturing costs can be saved. Further, in the case of repairing when the gas insulated switchgear is incompatible, a tow truck can approach the vicinity, so that the repairing time can be reduced.

In this embodiment, in order to connect the first and second groups of main buses 10a and 10b to each other, it is necessary to extend the gas insulated bus 10d, but the main buses 10a and 10b are Since there is only one, the effect of reducing the installation space is large and the transportation work and on-site assembly work are easier than in the case where all the gas-insulated buses 205 of a large number of line circuits are extended as in the fourth arrangement example. ,
Saves manufacturing costs. Further, since the gas-insulated buses 10c and 10d are used as the conductors connecting the main buses 10a and 10b between the respective groups, the insulation characteristics and safety are improved.

(2) Second Embodiment One embodiment corresponding to the second aspect of the present invention is described in the second embodiment.
An embodiment will be described below with reference to a plan view of FIG. That is, the present embodiment has substantially the same configuration as that of the first embodiment, but the power between the main buses 20a and 20b of the gas insulated switchgear in the first and second groups is not a gas insulated bus but an electric power. It is characterized by being connected by the cable 22.

According to this embodiment, the same operation and effect as those of the first embodiment can be obtained, and the power cable 22 is used for connection between the main buses 20a and 20b. In this case, the configuration can be performed at a lower cost than in the case of using, and the connection operation can be easily performed.

(3) Third Embodiment Another embodiment corresponding to the first to third aspects of the present invention will be described below as a third embodiment. The configuration of this embodiment is the same as that of the first and second embodiments, except that the installation operation timing of the gas insulation devices divided and arranged in the first and second groups is different. That is, in the present embodiment, the gas insulated switchgears of the first and second groups are divided and installed according to their use time.

In this embodiment, the following effects can be obtained. That is, it is rare that all devices (lines) are installed at the same time by one operation, and in most cases, they are added in accordance with the time of use. For this reason, if the final delivery shape is considered from the beginning, the gas insulated bus connecting the detention point and the line is long as in the conventional example, and the arrangement space is also large.

In the present embodiment, the gas-insulated switchgears of the first and second groups are divided and installed in accordance with the time of use, so that the gas-insulated bus for connection can be minimized. In addition, the existing gas insulated switchgear is also separated from the additional gas insulated switchgear in the extension work, so the extension work can be performed regardless of the existing gas switchgear, and the downtime of the existing gas insulated switchgear is minimized. Become.

(4) Fourth Embodiment One embodiment corresponding to the invention described in claim 4 is described as a fourth embodiment.
An embodiment will be described below with reference to FIGS. 9 and 10. FIG. 9 shows an example of a single-line connection diagram of the present embodiment, and FIG. 10 is a plan view in which this is configured as a gas-insulated switchgear.

(Configuration) First, the configuration of the present embodiment will be described. That is, as shown in FIG. 9, the gas insulated switchgear is constituted by a double bus, and
The line and the transformer line 42 are constituted by one line. In the gas insulated switchgear shown in the connection diagram of FIG. 9, the straight line connecting the legs 43 of the retaining tower and the straight line connecting the bushings 41 are the same straight line, as shown in FIG. The main bus 45 of the gas insulated switchgear is arranged in a direction parallel to the bushing 41.

The transmission line 40 connected in a direction orthogonal to the main bus 45 is directly connected to the bushing 41. The transmission lines 40 are arranged at intervals determined by the separation distance of the bushing 41, and the interval is ensured by extending the main bus 45. Further, the transformer circuit 42
It is arranged at a position opposite to the bushing 41 in a direction orthogonal to the main bus 45.

(Effects) The effects of the present embodiment having the above configuration are as follows. That is, since the transmission line 40 arranged in parallel with the bushing 41 is directly connected to the bushing 41, the gas-insulated bus can be reduced as much as possible, and the installation space can be reduced, the assembly efficiency can be improved, and the manufacturing cost can be saved. it can. Further, since the straight line connecting the legs 43 of the bushing retaining tower and the bushing 41 are arranged in the same straight line, the installation space is further reduced as compared with the case where the bushings 41 are arranged in parallel with each other.

(5) Fifth Embodiment One embodiment corresponding to the fifth aspect of the present invention is described in the fifth embodiment.
An embodiment will be described below with reference to FIG.
That is, the present embodiment has a connection structure similar to that of the above-described fourth embodiment, and has substantially the same arrangement. However, the bushings 51 are divided into two groups so as to be symmetric in FIG. The transmission lines 50 in each group are closely arranged in parallel.

According to the present embodiment having such a configuration, the fourth
And the bushings 51 are arranged symmetrically. Therefore, even if the interval between the transmission lines 40 is shortened, the bushings 5
1 can be ensured. Therefore, compared with the fourth embodiment, the main bus 55 can be shortened, and the installation space can be further reduced and the manufacturing cost can be saved.

(6) Sixth Embodiment One embodiment corresponding to the invention described in claim 6 is described in the sixth embodiment.
An embodiment will be described below with reference to FIG.
That is, the present embodiment has substantially the same configuration as that of the fifth embodiment, except that the transmission line 60 and the transformer line 6
It is characterized in that the gas-insulated busbar 66 is used for the connection between the two. According to this embodiment, the same operation and effect as those of the fifth embodiment can be obtained.
Insulation performance and safety can be improved by using the gas-insulated busbar 66.

(7) Seventh Embodiment One embodiment corresponding to the invention described in claim 7 is described in the seventh embodiment.
An embodiment will be described below with reference to FIG.
That is, the present embodiment has substantially the same configuration as that of the fifth embodiment, except that the transmission line 70 and the transformer line 7 have the same configuration.
It is characterized in that a power cable 77 is used for connection between the power supply device 2 and the power supply device 2. According to the present embodiment, it is possible to facilitate the connection work by using the power cable 77 and to reduce the manufacturing cost.

(8) Eighth Embodiment An eighth embodiment corresponding to the eighth aspect of the present invention will now be described.
An embodiment will be described below with reference to FIGS. 14 and 15. FIG. 14 shows an example of a single-line connection diagram of the present embodiment, and FIG. 15 is a plan view in which this is configured as a gas-insulated switchgear.

(Structure) First, the structure of the present embodiment will be described. That is, as shown in FIG. 14, the gas insulated switchgear is constituted by a double bus, but as shown in FIG. 15, the main buses 81a, 81b are connected to the bus disconnectors 82a,
82 b and a ground switch 83 are arranged, and are connected to a line breaker 85, a current transformer 86, a disconnector ground switch 87 via a current transformer 84, and a line bushing 89 via a gas insulated power line 88.

(Operation and Effect) The operation and effect of the present embodiment having the above configuration are as follows. That is,
The gas-insulated transmission line 88 used to connect the main buses 81a and 81b and the line bushing 89 has a smaller tank diameter than the gas-insulated bus. Therefore, SF ₆ gas volume, tank
The conductor material can be reduced, and the total weight and the total installation area can be reduced. Further, since the tank diameter is small, the gas pressure load on the bellows part is also small, and the basic structure can be simplified.

(9) Ninth Embodiment One embodiment corresponding to the invention described in claim 9 is described in ninth embodiment.
An embodiment will be described below with reference to FIGS. FIG. 16 shows an example of a single-line connection diagram of the present embodiment, and FIG. 17 is a plan view in which this is configured as a gas-insulated switchgear.

(Configuration) First, the configuration of the present embodiment will be described. That is, as shown in FIG. 16 and FIG. 17, the gas insulated switchgear is constituted by a double bus and arranged in three groups. The first group is composed of two line circuits 91 and one transformer circuit 92, and the second group is composed of four line circuits 91, two bus communication lines 93, two bus division lines 94, and the third. In this group, two line lines 91 and one transformer line 92 are provided.

The aerial wire drawing bushings 13 in each group are arranged on the same straight line.
In relation to other groups, they are arranged so that their positions are shifted so as to be parallel to each other. The main buses 10a, 1 of the gas-insulated switchgear are placed on a straight line parallel to these bushings 13.
0b is arranged. The spacing between the bushing 13 and the main buses 10a and 10b in each group is arranged so as to be equal to the other groups. The bushing 13 and the main buses 10a and 10b are connected via a line 91 and a gas-insulated bus in a direction orthogonal to these.

The main buses 10a, 10a,
10b is a gas-insulated busbar 90c,
90d, the main bus 10 in the adjacent group
a, 10b. In addition, transformer line 9
2. The bus connection line 93 and the bus division line 94 are arranged in a direction orthogonal to the main buses 90a and 90b of each group.

(Operation and Effect) The operation and effect of the present embodiment as described above are as follows. That is, the main buses 10a and 10b of the gas insulated switchgear are arranged in parallel and at equal intervals with respect to the bushings 13 divided and arranged in a plurality of groups, so that the bushings 13 and the main buses 10a and 10a in each group are arranged. The distance to 10b does not increase. Therefore, the bushing 13 and the main buses 10a, 10a
Thus, the length of the gas-insulated bus 15 connecting to b can be shortened, and the same function and effect as in the first embodiment can be obtained.

(10) Tenth Embodiment One embodiment corresponding to the tenth aspect of the present invention will be described below as a tenth embodiment with reference to FIG. That is, the present embodiment differs from the ninth embodiment in that the gas-insulated switchgear is divided into main buses 100a and 100b by gas-insulated buses 90d and 90b.
The connection is made by the power cable 102 instead of c. According to this embodiment, the same operation and effect as those of the ninth embodiment can be obtained, and the main bus 20
Since the power cable 22 was used for the connection between a and 20b,
The configuration can be made at a lower cost than when a gas-insulated bus is used, and the connection operation can be easily performed.

(11) Eleventh Embodiment One embodiment corresponding to the invention described in claim 11 will be described below as an eleventh embodiment with reference to the plan view of FIG.

(Configuration) First, the configuration of the present embodiment will be described. That is, in the present embodiment, the main bus 111 of the gas insulated switchgear of the double bus type is arranged in a U-shape. Each of the plurality of bushings 114 is divided and arranged in parallel with each side of the U-shaped main bus bar 11. Also, from each side of the main bus 111, a transmission line 112, a transformer line 113, a bus P
Each of the T lines 115 is pulled out vertically, and each of the power line lines 112 is connected to a bushing 114.

(Operation and Effect) The operation and effect of the present embodiment having the above configuration are as follows. That is,
Since the main bus 111 is arranged in a U-shape, the space in the longitudinal direction can be reduced as compared with the case where the main bus is straight.

Further, since the bushings 114 are arranged in parallel with each side of the U-shaped main bus 111, the distance between the bushing 114 and the main bus 111 does not increase, and the length of the transmission line 112 is not increased. The installation space, cost, and renovation time can be reduced.

(12) Twelfth Embodiment One embodiment corresponding to the twelfth embodiment will be described below as a twelfth embodiment with reference to a plan view of FIG.

(Structure) First, the structure of the present embodiment will be described. That is, in the present embodiment, the main bus 121 of the gas insulated switchgear of the double bus type is arranged in a k-shape. Each of the plurality of bushings 114 is divided and arranged in parallel with the upper side, the axis side, and the bottom side of the main bus 121 having the U-shape in the drawing. From each side of the main bus 121, a transmission line 112, a transformer line 113, and a bus PT line 115 are respectively drawn out vertically, and the transmission line 112 is connected to the bushing 1.
14.

(Operation and Effect) The operation and effect of the present embodiment having the above configuration are as follows. That is,
Since the main buses 121 are arranged in the shape of an engraving, the space in the longitudinal direction can be reduced as compared with the case where the main buses are straight lines.

Further, since the bushings 114 are arranged in parallel with the sides of the main bus 121 in the shape of the letter "K", the distance between the bushings 114 and the main bus 111 does not increase, and the length of the transmission line 112 is not increased. The installation space, cost, and renovation time can be reduced.

(13) Thirteenth Embodiment One embodiment corresponding to the thirteenth invention will be described below as a thirteenth embodiment with reference to the plan view of FIG.

(Configuration) First, the configuration of the present embodiment will be described. That is, in the present embodiment, the main bus 131 of the double bus type gas insulated switchgear is arranged in a T shape. The plurality of bushings 114 are divided and arranged in parallel with the upper side and the axial side of the T-shaped main bus bar 11 in the drawing. Also, from each side of the main bus 131, the transmission line 112, the transformer line 113, the bus P
Each of the T lines 115 is pulled out vertically, and each of the power line lines 112 is connected to a bushing 114.

(Operation and Effect) The operation and effect of the present embodiment having the above configuration are as follows. That is,
Since the main bus 131 is arranged in a T shape, the space in the longitudinal direction can be reduced as compared with the case where the main bus is a straight line.

Since the bushings 114 are arranged in parallel with the sides of the T-shaped main bus 131, the distance between the bushings 114 and the main bus 111 does not increase, and the length of the transmission line 112 does not increase. The installation space, cost, and renovation time can be reduced.

(14) Other Embodiments The present invention is not limited to the above embodiments, and the number, arrangement direction, and the like of each member can be appropriately changed.
For example, the main bus 10 in the first and second embodiments
If the angles a and 10b are acute angles as shown in FIGS. 2 and 8, the space reducing effect is high, but they may be right angles or obtuse angles. The number of bushings, main buses, and individual lines can be freely increased or decreased.

[0072]

As described above, the present invention can provide a gas insulated switchgear capable of reducing the installation space of the entire apparatus by properly arranging the main bus and the bushing.

[Brief description of the drawings]

FIG. 1 is a single-line diagram showing a first embodiment of the present invention.

FIG. 2 is a plan view of the embodiment of FIG.

FIG. 3 is a side view showing a line in the embodiment of FIG. 1;

FIG. 4 is a side view showing a transformer line in the embodiment of FIG.

FIG. 5 is a side view showing a bus connecting line in the embodiment of FIG. 1;

FIG. 6 is a side view showing a bus ground line in the embodiment of FIG. 1;

FIG. 7 is a side view showing the vicinity of a retaining bushing in the embodiment of FIG. 1;

FIG. 8 is a plan view showing a second embodiment of the present invention.

FIG. 9 is a single-line diagram showing a fourth embodiment of the present invention.

FIG. 10 is a plan view showing the embodiment of FIG. 9;

FIG. 11 is a plan view showing a fifth embodiment of the present invention.

FIG. 12 is a plan view showing a sixth embodiment of the present invention.

FIG. 13 is a plan view showing a seventh embodiment of the present invention.

FIG. 14 is a single-line diagram showing an eighth embodiment of the present invention.

FIG. 15 is a plan view showing the embodiment of FIG.

FIG. 16 is a single-line diagram showing a ninth embodiment of the present invention.

FIG. 17 is a plan view of the embodiment in FIG. 16;

FIG. 18 is a plan view showing a tenth embodiment of the present invention.

FIG. 19 is a plan view showing an eleventh embodiment of the present invention.

FIG. 20 is a plan view showing a twelfth embodiment of the present invention.

FIG. 21 is a plan view showing a thirteenth embodiment of the present invention.

FIG. 22 is a plan view showing a first arrangement example of a conventional gas insulated switchgear.

FIG. 23 is a plan view showing a second arrangement example of the conventional gas insulated switchgear.

FIG. 24 is a plan view showing a third arrangement example of the conventional gas insulated switchgear.

FIG. 25 is a plan view showing a fourth arrangement example of the conventional gas insulated switchgear.

[Explanation of symbols]

10a, b, 20a, b, 45, 81a, b, 90a,
b, 100a, b, 111, 151a, b ... main buses 10c, d, 15, 66, 90c, d, 158, 205
... gas-insulated buses 11, 201 ... line circuits 12, 42, 62, 72, 92, 113, 202 ... transformer circuits 13, 41, 51, 61, 71, 89, 114, 16
2, 203 ... bushing 14, 161, 204 ... cable head 17, 43 ... retaining tower 18, 93 ... busbar connection line 19 ... busbar ground line 22, 77 ... power cable 40, 50, 60, 70, 91, 112 ... Transmission line circuits 82a, b ... bus disconnectors 83, 153, 159 ... ground switches 84, 86, 155 ... current transformers 85, 154 ... breakers 87, 156 ... disconnectors ground switches 88 ... gas insulated transmission lines 94 ... Bus-line division line 102... Power cable 115... Bus-line PT 152 a, b.

 ──────────────────────────────────────────────────続 き Continuing from the front page (72) Inventor Hirokazu Ito 1-1-1, Shibaura, Minato-ku, Tokyo Inside Toshiba Corporation Head Office (72) Inventor Taisuke Imoto 66-2 Horikawa-cho, Saiwai-ku, Kawasaki City, Kanagawa Prefecture Inside Engineering Co., Ltd.

Claims (13)

[Claims] 1. A gas-insulated switchgear, wherein a plurality of bushings to which an overhead power transmission line is connected are connected to a main bus via a power transmission line, wherein the bushings are separately arranged on two or more straight lines in different directions. The gas is characterized in that the main buses are arranged in two or more groups so as to be parallel to the arrangement direction of each bushing, and the main buses in adjacent groups are connected to each other by a connection conductor. Insulated switchgear. 2. The gas insulated switchgear according to claim 1, wherein said connection conductor is constituted by a gas insulated bus. 3. The gas insulated switchgear according to claim 1, wherein the connection conductor is constituted by a power cable. 4. A gas insulated switchgear in which a plurality of bushings to which overhead power transmission lines are connected are connected to a main bus via a transmission line, wherein the bushings are on the same straight line and have an interval determined by an insulation separation distance. The main buses are arranged separately in parallel with the bushing arrangement direction and in correspondence with the bushing group, and the main buses in adjacent groups are connected to each other. A gas-insulated switchgear characterized by being coaxially extended by a conductor. 5. A gas-insulated switchgear in which a plurality of bushings connected to an overhead power transmission line are connected to a main bus via a power transmission line, wherein the bushings are on the same straight line and have an interval determined by an insulation separation distance. The power transmission lines in a direction perpendicular to the bushings are connected to adjacent ends of the bushings in at least two groups in parallel and close proximity to each other. Characterized gas insulated switchgear. 6. The gas insulated switchgear according to claim 4, wherein the main bus and a transformer line in a direction orthogonal to the main bus are connected via a gas insulated bus. . 7. The gas insulated switchgear according to claim 4, wherein the main bus and a transformer line in a direction orthogonal to the main bus are connected via a power cable. 8. A gas insulated switchgear, wherein a plurality of bushings connected to an overhead power transmission line are connected to a main bus via a power transmission line, wherein the bushing and the power transmission line connect a gas insulated transmission line. A gas-insulated switchgear connected through a switch. 9. A gas insulated switchgear, wherein a plurality of bushings to which an overhead power transmission line is connected are connected to a main bus via a power transmission line, wherein the bushings are arranged on two or more straight lines parallel to each other. The main buses are arranged in two or more groups such that the main buses are parallel to the arrangement direction of the respective bushings, and the main buses in adjacent groups are connected by a gas-insulated bus. Gas insulated switchgear. 10. A gas insulated switchgear, wherein a plurality of bushings connected to an overhead power transmission line are connected to a main bus via a power transmission line, wherein the bushings are arranged on two or more straight lines parallel to each other. The gas is characterized in that the main buses are arranged in two or more groups so as to be parallel to the arrangement direction of each bushing, and the main buses in adjacent groups are connected by a power cable. Insulated switchgear. 11. A gas insulated switchgear, wherein a plurality of bushings to which an overhead power transmission line is connected are connected to a main bus via a transmission line, wherein the main bus is provided in a U-shape. A gas insulated switchgear, wherein the switch is arranged on a straight line parallel to each of the U-shaped sides of the main bus. 12. A gas insulated switchgear, wherein a plurality of bushings connected to an overhead power transmission line are connected to a main bus via a power transmission line, wherein the main bus is provided in a U-shape, A gas-insulated switchgear, wherein the switch is arranged on a straight line that is parallel to each of the sides of the main bus bar. 13. A gas insulated switchgear, wherein a plurality of bushings to which an overhead power transmission line is connected are connected to a main bus via a power transmission line, wherein the main bus is provided in a T-shape, A gas insulated switchgear, wherein the switch is arranged on a straight line parallel to each side of the T-shape of the main bus.