JPH0746006Y2 - Gas insulated switchgear - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial field of application] The present invention relates to a gas-insulated switchgear having a double busbar structure installed in an electric station such as a substation.

[Prior Art] In a gas insulated switchgear having a double busbar structure, two busbar transformer units U1 and U2 each of which has an electrical configuration as shown in the single-wire connection diagram of Fig. 3 are installed. There are cases. In FIG. 3, BUS1 and BUS2 are connected to the first and second busbars, ES1 and ES2 are connected to the first and second grounding devices that ground the busbars BUS1 and BUS2, respectively, and PT1 and PT2 are connected to the busbars BUS1 and BUS2, respectively. And the first and second voltage transformers. The first busbar transformer unit U1 by means of the first busbar BUS1, the first grounding device ES1 and the first voltage transformer PT1.
And a second busbar transformer unit U composed of the second busbar BUS1, the first grounding device ES1 and the second voltage transformer PT1.
2 are configured.

The structure of a conventional bus voltage transformer unit of this type is shown in FIGS. 4A and 4A or 5A and 5B, in which E11 and E12 are the busbars BUS1 in the busbar containers 1A and 1B, respectively. The first and second busbar elements, E21 and E22, which house the busbar conductors that compose BUS2 and BUS2, are the first and second grounding devices ES in the grounding device containers 2A and 2B, respectively.
First and second grounding device elements 1 and ES2, E31 and E32, respectively, are first and second voltage transformers PT1 and PT2 housed in transformer containers 3A and 3B, respectively. And a second transformer unit.

The busbar containers 1A and 1B have a main pipe portion 1a and a main pipe portion 1a extending in the lateral direction.
Of the main pipe portion and a branch pipe portion 1b extending in a direction perpendicular to the axial direction of the main pipe portion, and the busbar conductor is housed in the main pipe portion 1a as shown by the broken line in FIG. 4B.

Grounding device containers 2A and 2B are a main pipe portion 2a extending in the vertical direction, a branch pipe portion 2b protruding from an intermediate portion of the main pipe portion 2a in a direction perpendicular to the axis of the main pipe portion, and a flange coupling to the branch pipe portion 2b. And a cylindrical grounding device storage portion 2c that has been
The upper ends of the respective main pipe portions 2a of 2B are connected to the branch pipe portions 1b of the busbar containers 1A and 1B via an insulating spacer 4. The grounding devices ES1 and ES2 are housed in the grounding device housing 2c of the containers 2A and 2B, respectively, and conductors that connect the busbars BUS1 and BUS2 and the voltage transformers PT1 and PT2 in the main pipe 2a of the containers 2A and 2B, respectively. Is stored. In addition, the transformer container 3A and
3B is composed of a cylindrical main container 3a arranged with its axis oriented in the up-down direction, and a substantially cup-shaped sub-container 3b detachably connected to the upper end of the main container 3a, and provided in the sub-container 3b. The branched pipe portions 3b1 are connected to the lower ends of the main pipe portions 2b of the containers 2A and 2B via insulating spacers 5, respectively. The voltage transformers PT1 and PT2 are housed in the containers 3A and 3B, respectively, and these voltage transformers are connected to the busbar BUS1 via the through conductor of the insulating spacer 5 and the conductor in the main pipe portion 2a of the containers 2A and 2B.
And BUS2. The main container 3a of the containers 3A and 3B is supported by a gantry 7 installed on the base 6, and
Unit control boxes 8A and 8B accommodating indicators and switches for operating equipment are attached to the side surface of the main container 3a of 3B.

In the example shown in FIGS. 4A and 4B, the first and second busbar transformer units U1 and U2 are connected to the respective grounding device storage portions 2c.
Are arranged on the same side of the busbars BUS1 and BUS2 in the direction perpendicular to the longitudinal direction, and the unit control boxes 8A and 8B are
Mounted in the longitudinal direction of BUS1 and BUS2. Then, on the sides adjacent to the longitudinal direction of the busbars of these units U1 and U2 (sideways in the direction perpendicular to the paper surface of FIG. 4B), along the longitudinal direction of the busbars BUS1 and BUS2, other circuit breakers are provided. Other units such as a circuit breaker unit housed in a container together with necessary equipment and a power receiving unit containing a cable head in a container together with a disconnector etc. are installed as appropriate according to the configuration of the electric station. An insulating switchgear is configured.

Further, in the example shown in FIGS. 5A and 5B, the first and second busbar transformers U1 and U2 have their respective grounding device housings 2c on the same side in the direction orthogonal to the longitudinal direction of the busbars BUS1 and BUS2. The unit control boxes 8A and 8B are arranged toward the bus BUS1 and
They are provided at opposite positions in a direction perpendicular to the longitudinal direction of BUS2, facing opposite sides.

In the example shown in FIGS. 4 and 5, the elements of each unit are arranged in a line in the vertical direction, and the units U1 and U2 are arranged in the horizontal direction. In some cases, the units U1 and U2 are arranged side by side in the horizontal direction and are arranged side by side in the vertical direction.

[Problems to be Solved by the Invention] In the example shown in FIGS. 4A and 4B, the unit control box 8A and
Since 8B is attached in the longitudinal direction of the busbar, there is a problem in that the distance between other units adjacent in the longitudinal direction of the busbar becomes long and the installation area of the gas insulated switchgear becomes large.

In the example shown in FIGS. 5A and 5B, in order to solve this problem, the unit control boxes 8A and 8B are opposed to each other in opposite positions in the direction (front-back direction) perpendicular to the longitudinal direction of the busbars BUS1 and BUS2. It is provided toward the side. However, in this case, the depth dimension of the gas-insulated switchgear is L2 for the unit control boxes 8A and 8B, and the depth dimension in the case of FIG.
There was a problem that it would be larger than L1. Further, in the case of FIG. 5, since the mounting positions of the unit control boxes 8A and 8B are different between the transformer elements E31 and E32, it is necessary to prepare two types of transformer elements, and the transformer elements are standardized. There was also the problem of not being able to do it.

An object of the present invention is to provide a gas insulated switchgear that solves the above problems.

[Means for Solving the Problems] As shown in FIG. 1 or FIG. 2 showing an embodiment of the present invention, a busbar element E11, E12 and a busbar in which busbar conductors are housed in busbar containers 1A, 1B are provided. Grounding device that grounds the grounding device in the grounding device containers 2A and 2B E21, E22
And two busbar transformer units U1 and U2, which are arranged in parallel with transformer elements E31 and E32, respectively, in which voltage transformers connected to the busbars are housed in transformer containers 3A and 3B. This is an improved gas-insulated switchgear in which the unit control boxes 8A and 8B are attached to the side surfaces of the transformer containers of the respective transformer elements of the two busbar transformer units by arranging them in parallel.

In the present invention, two busbar transformer units U1 and U2
The elements are provided on both sides of a plane P that is parallel to both the longitudinal direction of the busbar conductor and the parallel arrangement direction of the elements of each busbar transformer unit and extends in the direction perpendicular to the parallel arrangement direction of both the busbar transformer units. Each busbar transformer unit U1 and U2 elements and unit control box so that they are arranged symmetrically
8A and 8B are provided, and the busbar conductors of the busbar elements of the two busbar transformer units are arranged symmetrically with respect to the above plane.

[Operation] With the above-described configuration, the unit control boxes 8A and 8B are arranged at the positions opposite to each other in the direction perpendicular to the longitudinal direction of the busbar, so that the distance between other units adjacent to the longitudinal direction of the busbar is large. Can be shortened. Also the grounding device element
Since the grounding device storage portions 2c, 2 of E21 and E22 face the opposite sides, the units U1 and U2 can be arranged close to each other. Therefore, even if the unit control boxes 8A and 8B are placed at opposite positions, the depth dimension of the gas insulated switchgear
L3 can be shorter than in the case of FIG. Therefore, the gantry and the base for supporting the unit can be downsized, and the installation space for the gas insulated switchgear can be reduced.

[Embodiment] An embodiment of the present invention will be described below with reference to the accompanying drawings.

FIG. 1 shows a first embodiment of the present invention. In FIG. 1, the same parts as those of the example shown in FIG. 4 or 5 are designated by the same reference numerals.

In this embodiment, the busbar conductors of the busbar elements E11 and E12 are arranged symmetrically with respect to the plane P, as shown by the broken lines in FIGS. 1 and 2. Then, the unit control boxes 8A and 8B are arranged at opposite positions in a direction perpendicular to the longitudinal direction of the busbars BUS1 and BUS2, and the grounding device storage portions 2c, 2c of the containers of the grounding device elements E21 and E22 are oriented in opposite directions. The two busbar transformer units U1 and U2 are parallel to both the longitudinal direction of the busbars BUS1 and BUS2 and the juxtaposed direction of the elements of each busbar transformer unit, and the two busbar transformer units are juxtaposed. Elements E11 to E31 and E12 to E are provided on both sides of a plane P extending in a direction perpendicular to the direction.
32 are arranged symmetrically. Other configurations are similar to those of the example shown in FIG. 4 or FIG.

With this configuration, the grounding device elements E21 and E22
Since the grounding device storage portions 2c, 2c of the container do not interfere with each other, the units U1 and U2 can be arranged close to each other, and even if the unit control boxes 8A and 8B are arranged at opposite positions, the gas The depth dimension L3 of the insulated switchgear can be made shorter than before. Therefore, the depth dimensions of the gantry 7 and the base 6 can be shortened, and the installation area of the gas insulated switchgear can be reduced.

In the above embodiment, the positional relationship between the busbar conductor of the busbar BUS1 and the conductor in the grounding device element E21, the positional relationship between the busbar conductor of the busbar BUS2 and the busbar conductor in the grounding device element E22 is the same, The units U1 and U2 can have the same configuration. Therefore, according to the present invention, the units U1 and U2 may be configured to be exactly the same and arranged so that their directions are opposite to each other, so that standardization of the element can be achieved.

FIG. 2 shows a second embodiment of the invention, in which the container 3A of the transformer elements E31 and E32 is shown.
And 3B, the main container 3a for accommodating the voltage transformer, the sub-container 3b connected to the main container and the main container 3a the grounding device container 2A and
2B has a branch pipe portion 3b1 integrally provided in the sub-container 3b, and the branch pipe portion 3b1 has a plane P with respect to the main container 3a.
It is provided eccentrically to the side. Other points are first
This is similar to the illustrated embodiment.

In the configuration of FIG. 2, the depth dimension L4 of the busbar transformer unit is the same as the dimension L3 of the embodiment of FIG. 1, but the distance L5 between the busbar elements is smaller than the distance L0 of the embodiment of FIG. Therefore, it is possible to reduce the depth dimension of the circuit breaker unit and power receiving unit that are adjacent in the longitudinal direction of the busbar (direction perpendicular to the paper surface of the figure), and the installation area of the gas insulated switchgear is smaller than that of the case in Fig. 1 as a whole. Can be made smaller.

In each of the above embodiments, the elements of the units U1 and U2 are arranged side by side in the vertical direction. However, when the elements of each unit are arranged side by side in the horizontal direction, for example, the units U1 and U2 in FIG. While maintaining the positional relationship
The present invention can be applied by changing the direction by 90 degrees, and in this case, the height dimension of the gas insulated switchgear can be reduced.

[Effects of the Invention] As described above, according to the present invention, the unit control boxes are arranged at the positions opposite to each other in the direction perpendicular to the longitudinal direction of the busbar, so that the unit control box can be connected to other units adjacent to the longitudinal direction of the busbar. The distance between them can be shortened. Further, since the grounding device housing portions of the grounding device unit face opposite sides, the two busbar transformer units can be arranged close to each other. Therefore, even if the unit control boxes are arranged at opposite positions, the depth dimension of the gas insulated switchgear can be made shorter than before, and the installation space of the gas insulated switchgear can be reduced.

Further, according to the present invention, since the two busbar transformer units may be configured exactly the same and arranged so that their directions are opposite to each other, there is an advantage that the element can be standardized.

BRIEF DESCRIPTION OF THE DRAWINGS FIGS. 1 and 2 are side views showing different embodiments of the present invention, and FIG. 3 is a diagram showing each phase of a bus transformer unit of a gas-insulated switchgear to which the present invention is directed. 4 is a front view and a side view showing a conventional example, and FIGS. 5A and 5B are front views and a side view showing another conventional example, respectively. U1, U2 …… Bus transformer unit, E11, E12 …… Bus element, E21, E22 …… Grounding device element, E31, E33 …… Transformer element, 1A, 1B …… Bus container, 2A, 2B …… Grounding Equipment container, 3A, 3B ... transformer container, 8A, 8B ... unit control box.

Claims (2)

[Scope of utility model registration request] 1. A container for a transformer, which is a busbar element having a busbar conductor housed in a busbar container, and a grounding device for housing a grounding device for grounding the busbar in a grounding device container and a voltage transformer connected to the busbar. Two busbar transformer units, which are arranged in parallel with the transformer elements housed inside, are arranged in parallel so that the paralleling directions of the respective elements are parallel, and each of the busbar transformer units is a transformer. A gas-insulated switchgear in which a unit control box is attached to a side surface of a transformer container of an element, wherein a longitudinal direction of busbar conductors of the two busbar transformer units and a direction in which elements of each busbar transformer unit are arranged in parallel. The two busbar transformers are arranged so that the elements are symmetrically arranged on both sides of a plane that is parallel to both of them and extends in a direction perpendicular to the direction in which the two busbar transformer units are arranged in parallel. And a unit control box are arranged, and busbar conductors of busbar elements of the two busbar transformer units are arranged symmetrically with respect to the plane. . 2. The transformer container has a container main part for housing the voltage transformer and a branch pipe part for connecting the container main part to the grounding device container, and the branch pipe part is the container main part. The gas-insulated switchgear according to claim 1, wherein the gas-insulated switchgear is eccentrically provided on the plane side with respect to the part.