JPH10150709A - Gas-insulated switchgear - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a gas-insulated switchgear capable of making a installation space small by locating its components effectively. SOLUTION: First, third, second, and fourth main bus lines 1, 3, 2, and 4 are sequentially provided in parallel. A first bus section circuit (A) is provided at right angles with the first and third bus lines 1 and 3, while a second bus section circuit (B) is provided at right angles with the second and fourth bus lines 2 and 4. The first and second bus section circuit (A) and (B) are provided n parallel. A first transmission line circuit (C) connected at right angles to the first and third main bus lines 1 and 3 is provided on the other side from the second and fourth main bus lines 2 and 4. A second transmission line circuit (D) connected at right angles to the second and fourth main bus lines 2 and 4 is provided on the other side form the first and third main bus lines 1 and 3. A bushing 11 is connected with a lightning arrester.

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 power transmission facility such as a substation, and more particularly to a gas insulated switchgear having two bus division lines.

[0002]

2. Description of the Related Art A gas-insulated switchgear has excellent insulation and arc-extinguishing performance, is easy to maintain and inspect, because all charged parts are housed in a grounded metal container filled with an insulating gas. It has the advantage of being able to reduce space,
Widely used as substation equipment. As an example of such a gas-insulated switchgear, a double-bus four-bus tie system generally used conventionally will be described below with reference to FIG. First, iron pillars α, β, γ, and δ for supporting overhead wires are arranged at predetermined intervals around the gas insulated switchgear. Since a plurality of bushings 11 are arranged on the line connecting the iron poles α and β and the line connecting the iron poles γ and δ, the overhead wire drawing point (the end of the bushing) is connected to the iron poles α and β and the iron pole. It exists between γ and δ.

Then, a straight line connecting the iron columns α and β and the iron columns γ and
The main bus of the gas insulated switchgear is arranged and configured as follows between the straight line connecting δ. That is, the first
And the second main buses 1 and 2 are coaxially arranged. These first and second main buses 1 and 2 are divided by the first bus division line A. The first bus section line A is configured by connecting devices in the order of disconnector 5, instrument current transformer 6, circuit breaker 7, instrument current transformer 6, and disconnector 5, and these devices It is arranged coaxially with the first and second main buses 1 and 2.

In addition, third and fourth main buses 3 and 4 are arranged in parallel with the first and second main buses 1 and 2. The third and fourth main buses 3 and 4 are arranged coaxially and are divided by the second bus division line B. In the same manner as the first bus section line A, the second bus section line B is connected in the order of the disconnector 5, the instrument current transformer 6, the circuit breaker 7, the instrument current transformer 6, and the disconnector 5. These devices are arranged coaxially with the third and fourth main buses 3 and 4.

[0005] Of the first to fourth main buses 1 to 4, the first main bus 1 and the third main bus 3 are connected to the first transmission line C via disconnectors 5, respectively. And connected to an overhead line. Each device in the first transmission line C includes a disconnector 5, an instrument current transformer 6, a circuit breaker 7, an instrument current transformer 6, a disconnector 5, a grounding switch 8, an instrument transformer 9, The first and third main buses 1 and 3 are connected in order of the lightning arrester 10.
Are arranged in a direction perpendicular to the direction. The lightning arrester 10 includes a plurality of bushings 11 arranged between the iron poles α and β.
Is connected. In such a gas insulated switchgear, the axial length of the first and second main buses 1 and 2 is long, and the first and third main buses 1 and 2 and the bushing 1
Since the bushing 11 and the lightning arrester 10 are apart from each other, the bushing 11 and the lightning arrester 10 are extendedly connected via auxiliary buses 12 and 13 in directions orthogonal to each other.

On the other hand, a second main bus 2 and a fourth main bus 4
Are connected to the second transmission line circuit D via disconnectors 5 and to overhead lines. Each device in the second transmission line D is, like the first transmission line C,
The disconnector 5, the instrument current transformer 6, the circuit breaker 7, the instrument current transformer 6, the disconnector 5, the grounding switch 8, the instrument transformer 9, and the lightning arrester 10 are connected in this order. It is arranged in a direction orthogonal to main buses 2 and 4. The lightning arrester 10
A plurality of bushings 11 arranged between the iron columns γ and δ are connected. In such a gas insulated switchgear, the axial length of the third and fourth main buses 3 and 4 is long, and the distance between the second and fourth main buses 3 and 4 and the bushing 11 is small. Because they are far apart, the bushing 11 and the lightning arrester 10
Are extendedly connected via auxiliary buses 12 and 13 in directions orthogonal to each other.

[0007]

By the way, in the conventional example of the gas insulated switchgear as described above, the first and second gas insulated switchgears are provided.
Are arranged coaxially, and the third and fourth main buses 3, 4 and the bus segment B are arranged coaxially. Each of the second main buses 1 and 2 and the third and fourth main buses 3 and 4 has a longer dimension in the longitudinal direction. And
Since the length of the main bus in the longitudinal direction is long as described above, the transmission line C and the transmission line D are connected to the tower α provided at a fixed position.
, And the space required for installation of each component device is increased in the longitudinal direction of the main bus. However, in substations in recent years, it is difficult to acquire land near the city, so downsizing of facilities is desired. Therefore, the gas insulated switchgear that causes an increase in installation space as described above is not optimal. .

Further, as described above, the transmission line C and the transmission line D are disposed closer to the tower α and the tower δ and are separated from the bushing 11, so that the connection between the bushing 11 and the lightning arrester 10 is assisted. A bus 12 is required. Further, since the distance between the bushing 11 provided at the fixed position and the main bus is large, the auxiliary bus 13 is required. As described above, an extra member is required for extending the bus in accordance with the distance between the members, and thus the manufacturing cost is increased.

The present invention has been proposed to solve the above-mentioned problems of the prior art, and its main purpose is to reduce the installation space by efficiently arranging the components. It is to provide a gas insulated switchgear which can be operated.

Another object of the present invention is to provide a gas insulated switchgear capable of reducing manufacturing costs by shortening members for connecting constituent devices.

[0011]

In order to achieve the above object, the invention according to claim 1 comprises a first main bus, a second main bus, a third main bus, and a fourth main bus. A first bus dividing line for dividing the first and second main buses and a second bus dividing line for dividing the third and fourth main buses are grounded with an insulating gas; In the gas insulated switchgear housed in the container, the first main bus and the third main bus are arranged parallel to each other, and the second main bus and the fourth main bus are arranged parallel to each other. , The first and second bus segment lines are arranged in parallel with each other and in a direction orthogonal to each of the main buses.

According to the first aspect of the present invention, the first and second bus segment lines are not arranged coaxially with respect to the main buses 1 to 4, but are arranged in a direction orthogonal to each other. Therefore, the length of the main bus bar in the longitudinal direction is reduced.

According to a second aspect of the present invention, in the gas insulated switchgear according to the first aspect, a first transmission line connected to the first and third main buses, and the second and fourth transmission lines are connected to the first and third main buses. A second transmission line connected to the main bus,
Power line is led out on the opposite side to the second and fourth main buses, and in a direction orthogonal to each of the main buses,
The second transmission line is led out on a side opposite to the first and third main buses and in a direction orthogonal to each of the main buses.

According to the above-described second aspect of the present invention, the power transmission lines on the first and second bus segment lines are opposite to the main bus line of the opposing bus segment line and orthogonal to the main bus line. However, since the first and second bus segment lines are arranged in a direction orthogonal to each main bus, the distance between the overhead bus drop point at a predetermined position and the main bus is set. Can be shortened, and the number of connecting members between the first and second transmission lines and the overhead wire drop-in points can be saved.

[0015]

DESCRIPTION OF THE PREFERRED EMBODIMENTS One embodiment corresponding to the first and second aspects of the present invention will be described with reference to the plan view of FIG.
This will be described below according to the single-line diagram of FIG. Note that the present embodiment is a gas insulated switchgear of the double bus and four bus tie type, similarly to the conventional example shown in FIG. Therefore, the same components as those in the conventional example are denoted by the same reference numerals, and description thereof will be omitted.

(1) Configuration of Embodiment First, the configuration of this embodiment will be described. That is, in the present embodiment, as shown in FIG. 1, first main bus 1 and third main bus 3 are arranged adjacent to each other, and first main bus 2 and fourth main bus 4 Are arranged adjacent to each other. These four main buses 1 to 4 are arranged in parallel with each other. Among these, the first bus division line A is arranged and connected to the first main bus 1 and the second main bus 2 in a direction orthogonal to the first main bus 1 and the second main bus 2. Further, a second bus division line B is arranged and connected to the third main bus 3 and the fourth main bus 4 in a direction orthogonal to the third main bus 3 and the fourth main bus 4. These first and second bus division lines A and B are arranged in parallel with each other.

The first transmission line C connected to the first and third main buses 1 and 3 is disposed on the opposite side of the second and fourth main buses 2 and 4. Each device in the first transmission line C is provided with a disconnector 5, an instrument current transformer 6, a circuit breaker 7, an instrument current transformer 6, and a disconnector 5 of the first and third main buses 1 and 3. , A grounding switch 8, an instrument transformer 9, and a lightning arrester 10 in this order, and are arranged in a direction orthogonal to the first and third main buses 1 and 3. The lightning arrester 10 is connected to a plurality of bushings 11 provided at fixed positions without passing through extension buses 12 and 13.

Further, a second transmission line D connected to the second and fourth main buses 2 and 4 is disposed on the opposite side of the first and third main buses 1 and 3. Like the first transmission line C, each device in the second transmission line D includes a disconnector 5, an instrument current transformer 6, and a circuit breaker 7 of the second and fourth main buses 2 and 4. , An instrument current transformer 6, a disconnector 5, a grounding switch 8, an instrument transformer 9, and a lightning arrester 10 are connected in this order.
It is arranged in a direction orthogonal to the second and fourth main buses 2, 4. The lightning arrester 10 is connected to a plurality of bushings 11 provided at fixed positions without passing through extension buses 12 and 13.

The first and third main buses 1, 3 and the second
And transmission line lines other than the transmission line lines C and D where the fourth main buses 2 and 4 are arranged, the first and third transmission lines are not shown.
The other power transmission lines connected to the main buses 1 and 3 are arranged on the opposite sides of the second and fourth main buses 2 and 4 and in a direction orthogonal to the main buses. Other transmission lines connected to the main buses 2 and 4 are arranged on the opposite sides of the first and third main buses 1 and 3 and in a direction orthogonal to the main buses.

(2) Operation and Effect of the Embodiment The operation and effect of the embodiment having the above configuration are as follows. That is, the bus division lines A and B
Are arranged not coaxially with the first to fourth main buses 1 to 4 but in a direction orthogonal to the first to fourth main buses 1 to 4, , B, the size of the first to fourth main buses 1 to 4 can be reduced. Then, as a result of arranging the bus division lines A and B in a direction orthogonal to the main bus, the transmission line C and the transmission line D are separated from the towers α and δ provided at fixed positions. Thus, the space required in the longitudinal direction of the main bus for installing each component device can be reduced. Therefore, the size of the gas insulated switchgear as a whole can be reduced, which meets the demands for downsizing equipment and reducing installation space due to difficulty in acquiring land.

Further, as described above, the transmission line C and the transmission line D separate from the tower α and the tower δ, and the bushing 11
The bushing 11 and the lightning arrester 1
0 is close, and the auxiliary bus 12 of the above-mentioned conventional example becomes unnecessary. Further, since the bus division lines A and B are arranged in a direction orthogonal to the main bus, the distance between the main bus and the bushing 11 is shortened, the bushing 11 and the lightning arrester 10 are close to each other, and the auxiliary bus 13 of the conventional example is unnecessary. Becomes As described above, since an extra member for extending the bus is not required, manufacturing cost can be saved.

(3) Other Embodiments The present invention is not limited to the above embodiments, and the shape, arrangement, number, etc. of each member can be appropriately changed. For example, the connection direction of the transmission line may not necessarily be a direction orthogonal to the main bus. The number of transmission lines and bushings can also be increased or decreased as appropriate.

[0023]

As described above, according to the present invention,
By efficiently arranging the components, it is possible to provide a gas insulated switchgear capable of reducing the installation space.

Further, according to the present invention, it is possible to provide a gas insulated switchgear capable of reducing manufacturing costs by shortening members for connecting component devices.

[Brief description of the drawings]

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

FIG. 2 is a single-line diagram of the embodiment of FIG. 1;

FIG. 3 is a plan view showing an example of a conventional gas insulated switchgear.

[Explanation of symbols]

 1, 2, 3, 4 ... main bus 5 ... disconnector 6 ... instrument current transformer 7 ... breaker 8 ... ground switch 9 ... instrument transformer 10 ... lightning arrester 11, 12 ... ground bus A ... first Bus division line B: Second bus division line C: First transmission line D: Second transmission line α, β, γ, δ: Iron pole

Claims (2)

[Claims] A first main bus, a second main bus, a third main bus, a fourth main bus, and a first bus division line for dividing the first and second main buses into buses. , The third and fourth
A second insulated switchgear which accommodates a second bus segment line for dividing the main bus in a grounded container filled with insulating gas, wherein the first main bus and the third main bus are parallel to each other. The second main bus and the fourth main bus are arranged parallel to each other, and the first and second bus segment lines are parallel to each other and in a direction orthogonal to each of the main buses. A gas-insulated switchgear, which is arranged. 2. A power transmission line connected to the first and third main buses, and a second power transmission line connected to the second and fourth main buses, A first power line is led out on a side opposite to the second and fourth main buses, and in a direction orthogonal to each of the main buses. The gas insulated switchgear according to claim 1, wherein the gas insulated switchgear is led out on a side opposite to the third main bus and in a direction orthogonal to each of the main buses.