JP3143133B2 - Gas insulated switchgear - Google Patents

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 installed in a substation or the like.

[0002]

2. Description of the Related Art FIG. 2 is a single-line diagram of a branch line which is composed of two groups of main buses at a substation or the like and branches off from the main buses. FIG. 3 is a side view of a conventional device in the case where the configuration of the single-line diagram shown in FIG. 2 is configured by a gas insulated switchgear.
In FIGS. 2 and 3, reference numeral 1 denotes a first main bus group including a phase-separated main bus 1a, 1b, and 1c composed of three phases.
Is a phase-separated main bus 2a, 2b, 2c having the same configuration as 1.
Is a second main bus group, which is a group. 3a, 3b, 3c
Is a first connection bus connecting between each main bus 1a, 1b, 1c of the first main bus group 1 and a first bus switching disconnector 5 described later, and 4a, 4b, 4c is a second main bus. This is a second connection bus that connects between each main bus 2a, 2b, 2c of the group 2 and a second bus switching disconnector 6, which will be described later. “A”, “b” and “c” attached to 1 to 4 represent the “a” phase, “b” phase and “c” phase among the three phases of each part. 5 is a first bus switching disconnector for connecting and disconnecting the first main bus group 1 and the branch line, and 6 is a second bus switching disconnector for connecting and disconnecting the second main bus group 2 and the branch line. It is a vessel. Reference numeral 7 denotes a third connection bus connecting between the first bus switching disconnector 5 and the second bus switching disconnector 6, and 8 denotes a grounding device for grounding the third connection bus 7 during inspection. is there.
Reference numeral 9 denotes a bus-side current transformer for detecting line current required for system control, 10 denotes a circuit breaker for opening and closing the line, and 11 denotes a line-side current transformer for detecting line current required for system control. 12 is a line disconnector for opening and closing the line, 13 and 14 are grounding devices for grounding during inspection, 13 is a circuit breaker-side grounding device, and 14 is a line-side grounding device. Reference numeral 15 denotes a cable connection portion to which the line is connected, and reference numeral 16 denotes a fourth connection bus connecting the line disconnector 12 and the cable connection portion 15.

A conventional gas insulated switchgear composed of two groups of main buses is constructed as described above, and the main buses 1a, 1b, 1c of the first main bus group 1 and the second main bus group. The two main buses 2a, 2b, 2c are arranged horizontally on the base plane,
The first bus switching disconnector 5 is a central phase 1b of the first main bus group.
Above the central bus 2b of the second main bus group, the first and second bus switching disconnectors 5 and 6 are connected to the third connection bus 7 And is connected to a circuit breaker 10 via a current transformer 9 in a direction orthogonal to the main bus groups 1 and 2. A grounding disconnector 8 for grounding the space between the second busbar switching disconnector 6 and the circuit breaker 10 during inspection is mounted on the right side of the second busbar switching disconnector 6 as shown. The current transformer 11, the line disconnector 12, and the fourth connection bus 16 are sequentially connected from the upper portion of the circuit breaker 10, and the upper portions of the bus switching disconnectors 5, 6 are mounted in a direction orthogonal to the main bus group, and cable connection is performed. Part 15
It is connected to the. Grounding devices 13 and 14 required for inspection are attached to the circuit breaker 10 side of the line disconnecting switch 12, and 14 is attached to the line side.

[0004]

The conventional gas insulated switchgear constructed as described above is composed of the main buses 1a, 1b, 1c of the first main bus group and the respective phases of the second main bus group. Since the main buses 2a, 2b, 2c are horizontally arranged on the base surface, a large installation area is required. Also, the distance between the first and second bus switching disconnectors 5 and 6 is large and the third connection bus 7 is required, and the distance between the circuit breaker 10 and the cable connection portion 15 is long. Connection bus 16 was also long.

SUMMARY OF THE INVENTION The present invention has been made to solve the above-mentioned problems, and has been made to reduce the arrangement area of a main bus group, to reduce the distance between a breaker and a cable connection portion constituting a branch line, and to achieve gas insulation. The purpose is to reduce the size of the switchgear.

[0006]

SUMMARY OF THE INVENTION The gas insulated switchgear according to the present invention, the first main mother to phase separation three phase one group
A line group and a second main bus group, and a portion branched from the main bus group.
Bus switching for connecting and disconnecting the main line and the main bus group
Branch line machine composed of a road device, circuit breaker, line disconnector, etc.
In a gas insulated switchgear equipped with a switch, the first main bus group
One of the three phases and one of the three phases of the second main bus group
Phase and adjacent to each other on the same plane and arranged in parallel,
Adjacent to the side of one of the three phases of the main bus group,
Of one of the other two phases of the main bus group
In the upper and lower two stages just above one of the other two phases,
One of the three phases of the second main bus group
Adjacent to the side of one phase, the other two phases of the second main bus group
One of these phases is arranged, and the other two phases are
The remaining one phase is placed just above the one phase in two upper and lower stages, and
A first main bus group and a parallel arrangement
Bus switching to the upper part of each one phase of the second main bus group
A disconnector is provided .

[0007]

By arranging the phases of the main buses of each group as described above, the installation area of the main bus group is reduced, the interval between the two bus switching switches is reduced, and the breaker and the cable connection section are connected. The distance becomes shorter, and the size of the gas-insulated switchgear can be reduced.

[0008]

[Embodiment 1] An embodiment of the present invention will be described below with reference to the drawings. FIG. 1 is a side view showing an embodiment of the present invention. In FIG. 1, 1 and 1a, 1b, 1c,
Reference numerals 2 and 2a, 2b, 2c, 5, 6, 8 to 15 indicate the same or the same functions as those in FIG. Reference numerals 17a, 17b, 17c denote first connection buses for connecting the phase main buses 1a, 1b, 1c of the first main bus group 1 and the first bus switching disconnector 5 for each phase, 18a, 18b, 18c
Is a second connection bus connecting each phase main bus 2a, 2b, 2c of the second main bus group 2 and the second bus switching disconnector 6 for each phase. Reference numeral 19 denotes a fourth connection bus connecting between the line disconnector 12 and the cable connection unit 15.

In the gas insulated switchgear having the above configuration,
The main buses 1c and 2a of each phase of the three main buses constituting the first main bus group 1 and the second main bus group 2 are arranged adjacently and in parallel on the same plane. Each other 2 of bus groups 1 and 2
Phase main buses 1a, 1b and 2b, 2c
The main buses 1a, 1a of the first main bus group are arranged adjacent to the side surfaces of the main buses 1c, 2a of each phase arranged in parallel.
1b, two main buses 2b and 2c of the second main bus group are arranged adjacent to the side surface of 2a, and the adjacent main buses of the first main bus group and the second main bus group are arranged. A first bus switching disconnector 5 is provided above the main bus 1c among the buses 1c and 2a,
The second busbar switching disconnector 6 is arranged at the upper part of the line a. Each phase main bus 1a, 1 of the first main bus group 1
b, 1c and the first bus switching disconnector 5 are connected by first connection buses 17a, 17b, 17c to each phase main bus 2a, 2b, 2c of the second main bus group 2 and the second bus switching. The disconnectors 6 are connected by second connection buses 18a, 18b, 18c, respectively.

By arranging the first main bus group 1 and the second main bus group 2 in this manner, the first bus switching disconnector 5 and the second bus switching disconnector 6 are arranged close to each other. It is possible to connect between the two without using the third connection bus. Also, with the circuit breaker 10,
The distance to the cable connection 15 is also reduced, and the fourth connection bus
19 can be shortened.

Embodiment 2 FIG. Even in the case where the cable connecting portion 15 is changed to a structure to which the air bushing can be connected, the air bushing is attached, and it is configured to be connected to the overhead power line,
It goes without saying that the gas insulated switchgear can be configured in the same manner without change.

[0012]

As described above, according to the present invention, one of the three phases of the first main bus group and the three phases of the second main bus group are used.
One of the phases is arranged adjacent to and in parallel on the same plane,
Adjacent to the side of one of the three phases of the first main bus group
And arrange one phase of the other two phases of the first main bus group.
And the upper and lower two just above one of the other two phases
The remaining one phase is arranged in a row, and the three phases of the second main bus group are arranged.
Of the second main bus group
One of the two phases is arranged, and the other two phases are arranged.
The remaining one phase is placed in the upper and lower two stages just above one phase
And the first main body arranged adjacently and in parallel on the same plane.
Upper part of each phase of the bus group and the second main bus group
Since a configuration of arranging the bus switching換断path unit, the smaller footprint of the main bus section, and a bus switching換断path unit to each upper portion of the first main bus group and the second main bus groups of adjacent phases by the placed, two bus switching換断path unit becomes possible to connect directly close, even shorter distance between the further breaker and the cable connection portion, it is achieved the miniaturization as a gas insulated switchgear it can.

[Brief description of the drawings]

FIG. 1 is a side view showing one embodiment of a gas insulated switchgear according to the present invention.

FIG. 2 is a single-line diagram showing a substation branch line portion composed of two groups of buses.

FIG. 3 is a side view when the configuration of the single-line connection diagram shown in FIG. 2 is configured by a conventional gas insulated switchgear;

[Explanation of symbols]

 1 first main bus group 1a first main bus a phase 1b first main bus b phase 1c first main bus c phase 2 second main bus group 2a second main bus a phase 2b second Main bus b phase 2c Second main bus c phase 3a First connection bus a phase 3b First connection bus b phase 3c First connection bus c phase 4a Second connection bus a phase 4b Second connection bus b phase 4c second connection bus c phase 5 first bus switching disconnector 6 second bus switching disconnector 7 third connection bus 8 grounding device 9 current transformer 10 circuit breaker 11 current transformer 12 line disconnector 13 Grounding device 14 Grounding device 15 Cable connection 16 Fourth connection bus 17a First connection bus a-phase 17b First connection bus b-phase 17c First connection bus c-phase 18a Second connection bus a-phase 18b Second connection bus b phase 18c Second connection bus c phase 19 Fourth connection bus

Claims (1)

(57) [Claims] 1. A first main bus group and a second main bus group having three phases separated as one group, and connection and disconnection of a branch line branched from the main bus group and the main bus group. In a gas-insulated switchgear provided with a branch line device composed of a bus switching disconnector to be performed, a circuit breaker, a line disconnector, etc., one of three phases of a first main bus group and a second main bus group
One of the three phases is arranged adjacent to and in parallel on the same plane , and adjacent to the side face of one of the three phases of the first main bus group.
And arrange one phase of the other two phases of the first main bus group.
And the upper and lower two just above one of the other two phases
The remaining one phase is arranged in a row, and is adjacent to the side face of one of the three phases of the second main bus group.
And arrange one phase of the other two phases of the second main bus group.
And the upper and lower two just above one of the other two phases
A stage, arranged the remaining one phase, first main bus bars arranged in parallel are adjacent above Symbol same plane
A gas insulated switchgear, characterized in that a bus switching disconnector is disposed above each one phase of the group and the second main bus group .