WO2013046737A1

WO2013046737A1 - Gas-insulated switchgear

Info

Publication number: WO2013046737A1
Application number: PCT/JP2012/051387
Authority: WO
Inventors: 慎太郎黒明; 英二森藤; 孝年大坪
Original assignee: 三菱電機株式会社
Priority date: 2011-09-29
Filing date: 2012-01-24
Publication date: 2013-04-04
Also published as: CN103503257B; JP5683711B2; JPWO2013046737A1; CN103503257A

Abstract

This gas insulated switchgear is provided with: a container in which the necessary equipment is housed; cylindrical tank bodies which are individually provided, on the back side of the container, for three phases; overhead power line power reception section tank bodies which are respectively provided on the cylindrical tank bodies; and bushings which are respectively provided on the overhead power line power reception section tank bodies. Each of the cylindrical tank bodies is configured so as to be able to be installed at any position in the circumferential direction.

Description

Gas insulated switchgear

The present invention relates to a cubicle type gas insulated switchgear that can be used as a switchgear for power transmission / distribution and power distribution facilities, for example.

Examples of conventional cubicle type gas insulated switchgear include those shown in FIGS. FIG. 10 is a side sectional view showing a conventional gas insulated switchgear. FIG. 11 is a front view showing a conventional gas insulated switchgear.

In each of these drawings, all the charging parts 7 of the gas-insulated switchgear are collectively stored in the rectangular container 1 and the SF6 gas is sealed. The operation unit 2, the monitoring panel 3 and the like of the gas circuit breaker GCB are arranged below the square container 1.

The retracting part is constituted by a bushing 4, and the bushing 4 is attached to the upper part of the square container 1. From the bushing 4, the current transformer CT, the disconnector DS 1, the gas circuit breaker GCB, the disconnector DS 2, the reciprocating conductor BUS connected to the MOF, the disconnector DS 3, and the transformer connection 5 are led to the transformer 6. A line arrester LA and ground switches ES1 to ES4 are provided between the main circuit in the rectangular container 1 and the ground.

The three-phase three bushings 4 have a wider interval than the interval between the mounting flanges 8 in order to maintain the inter-phase insulation distance C in the atmosphere at the charging portion 7 at the tip thereof. For this reason, the mounting flange 8 of the bushing 4 disposed in the center is provided upright on the upper part of the rectangular container 1, but the mounting flanges 8 on both sides thereof are attached with an angle in a certain direction away from the center. . A bushing 4 is attached to the attachment flange 8 via an insulating spacer 9 in order to seal the rectangular container 1. The connection between the bushing 4 and the inside of the rectangular container 1 is made by a through conductor 10 provided in the insulating spacer 9.

Japanese Utility Model Publication No. 7-16512

In the conventional gas insulated switchgear described above, it is necessary to change the mounting flange 8 in order to change the mounting angle of the bushing 4 (inclination angle of the bushing 4 in the horizontal direction in FIG. 10). There was a problem that it was not possible.
For this reason, the restriction on the inter-line dimensions in overhead power reception has been dealt with by securing an insulation distance by adding a vacant board to the line board.

In addition, the current transformer CT is also housed in the rectangular container 1, and there is a problem that it takes time to install, remove, and maintain.

The present invention has been made in order to solve the above-described problems, and an object of the present invention is to allow the mounting angle of the overhead wire power receiving unit tank body to be attached in an arbitrary direction. It is intended to provide a gas insulated switchgear that is easy to install, remove and maintain.

A gas-insulated switchgear according to the present invention includes a container that houses necessary equipment, a cylindrical tank body that is provided in three phases on the back of the container, and an overhead wire power receiving unit that is provided in each of the cylindrical tank bodies. A tank body and a bushing respectively provided in the overhead wire power receiving unit tank body are provided, and each of the cylindrical tank bodies is configured to be attachable to an arbitrary position in the circumferential direction.

According to the gas insulated switchgear according to the present invention, it is possible to mount the overhead wire power receiving unit tank body in an arbitrary direction, and the gas insulated switchgear that is easy to install, remove and maintain the current transformer. A device can be obtained.

It is a side view which shows the gas insulated switchgear concerning Embodiment 1 of this invention. It is a figure which shows the overhead wire charging part tank body part seen from the arrow X direction of FIG. 1 in the gas insulated switchgear concerning Embodiment 1 of this invention. It is a perspective view which shows the gas insulated switchgear concerning Embodiment 2 of this invention. It is a side view which shows the gas insulated switchgear concerning Embodiment 2 of this invention. It is a sectional side view which shows the gas insulated switchgear concerning Embodiment 2 of this invention. It is a rear view which shows the gas insulated switchgear concerning Embodiment 2 of this invention. FIG. 6 is a view of the gas insulated switchgear according to Embodiment 2 of the present invention as viewed from the GG direction of FIG. It is an enlarged view of the H section of FIG. 4 in the gas insulated switchgear concerning Embodiment 2 of this invention. It is principal part sectional drawing which shows the connection part inside FIG. 8 in the gas insulated switchgear concerning Embodiment 2 of this invention. It is a sectional side view which shows the conventional gas insulated switchgear. It is a front view which shows the conventional gas insulated switchgear.

Embodiment 1 FIG.
Hereinafter, Embodiment 1 of the present invention will be described with reference to FIG. 1 and FIG. 2. 1 is a side view showing a gas insulated switchgear according to Embodiment 1 of the present invention. FIG. 2 is a diagram showing an overhead wire charging unit tank body portion as viewed from the direction X of FIG. 1 in the gas insulated switchgear according to Embodiment 1 of the present invention.

In each of these drawings, reference numeral 11 denotes a box-shaped metal container in which components of the switching circuit such as a circuit breaker and a disconnecting switch are accommodated. An insulating gas such as SF6 gas is sealed in the container 11 at a predetermined pressure.

12 is a cylindrical tank body provided in three phases in the horizontal direction on the rear surface from which the bus bar which is one surface of the container 11 is pulled out, and is connected to the bus bar lead-out portion 13 at the lower part of the rear surface of the container 11. The cylindrical tank body 12 is formed with a circumferential equiangular mounting pitch and is configured to be mounted at an arbitrary position in the circumferential direction.

14 is an overhead wire power receiving unit tank body provided in the

cylindrical tank body

12, and 15 is a bushing provided in each overhead wire power receiving unit tank body 14. Reference numerals 16 denote current transformers provided on the outer peripheral side of the overhead wire power receiving unit tank body 14.

Next, the operation will be described. In each of the three phases, a cylindrical tank body 12, an overhead wire power receiving section tank body 14, a bushing 15 and a current transformer 16 are integrally connected. The phase located in the center is arranged in parallel to the vertical direction as shown in FIG. 2 and is configured such that the mounting angle can be changed in the direction of arrow D with the central axis of the cylindrical tank body 12 as a support shaft. Yes. The phase located on the right side is arranged at a predetermined angle with respect to the phase located in the center as shown in FIG. 2, and the mounting angle is changed in the direction of arrow E with the central axis of the cylindrical tank body 12 as a support shaft. It is configured to be possible. The phase located on the left side is arranged at a predetermined angle with respect to the phase located in the center as shown in FIG. 2, and the mounting angle is changed in the direction of arrow F with the central axis of the cylindrical tank body 12 as a support shaft. It is configured to be possible.

As described above, the cylindrical tank body 12 is formed at a circumferential equiangular mounting pitch, for example, a 15-degree pitch. By attaching the cylindrical tank body 12 in the circumferential direction as required, the overhead power receiving unit tank The tilt angle of the body 14 can be changed to an arbitrary position, and it becomes possible to easily cope with the restrictions on the inter-line dimensions of each phase.

Therefore, by optimizing the mounting angle of the overhead power receiving unit tank body 14 for securing the inter-line dimensions of each phase, a vacant space is not required and the assembly time can be shortened.

In addition, a cylindrical tank body 12 is provided in the lower part of the rear surface of the board, which is the bus bar position of the container 11, that is, the bus bar lead-out part 13, and the overhead line power receiving part tank body 14 and the bushing 15 are respectively connected to these cylindrical tank bodies 12. Since the current transformer 16 is disposed, the installation space in the height direction can be reduced.

Furthermore, in the conventional gas insulated switchgear described above, the current transformer CT is accommodated in the rectangular container 1, but in this embodiment, the current transformer 16 is provided on the outer peripheral side of the overhead wire power receiving section tank body 14. It was set as the structure which attaches. By comprising in this way, the attachment or removal of the current transformer 16 and the improvement of maintainability can be aimed at.

Embodiment 2. FIG.
A second embodiment of the present invention will be described with reference to FIGS. 3 to 9. In the drawings, the same or corresponding members and parts will be described with the same reference numerals. 3 is a perspective view showing a gas insulated switchgear according to Embodiment 2 of the present invention. 4 is a side view showing a gas insulated switchgear according to Embodiment 2 of the present invention. 5 is a side sectional view showing a gas insulated switchgear according to Embodiment 2 of the present invention. 6 is a rear view showing a gas insulated switchgear according to Embodiment 2 of the present invention. 7 is a view of the gas insulated switchgear according to Embodiment 2 of the present invention as seen from the direction GG in FIG. FIG. 8 is an enlarged view of the portion H in FIG. 4 in the gas insulated switchgear according to Embodiment 2 of the present invention. FIG. 9 is a cross-sectional view of the principal part showing the internal connection of FIG. 8 in the gas insulated switchgear according to Embodiment 2 of the present invention.

In the second embodiment, the installation state when the gas insulated switchgears are arranged in five planes 11a to 11e is shown. As shown in FIG. 6, the inner side of the overhead wire power receiving unit tank body 14 is arranged vertically. Then, the case where the tilt angle is changed by, for example, 15 degrees toward the outer side of the panel in sequence is shown, so that it becomes possible to easily cope with the restrictions on the inter-line dimensions of each phase.

In each of these drawings, an equipment container 17, a line side bus container 18 and a load side bus container 19 are accommodated in a container 11 having a front door 11a, and the inside of each container is SF6 gas, dry air, nitrogen gas, carbon dioxide. Insulating gas such as is enclosed.

A three-phase line-side bus 20 is disposed in parallel in the line-side bus container 18 via an insulating spacer 21 and penetrates airtightly in a direction perpendicular to the paper surface. The line-side bus 20 is led into the device container 17 via the bus-side disconnector 22 and the connection conductor 23. Further, a three-phase load side bus 24 passes through the load side bus container 19 through an insulating spacer 25 in a direction perpendicular to the paper surface. On the other hand, in the device container 17, main circuit devices such as the circuit breaker 26 and the line-side disconnector 27, and auxiliary devices such as the ground switch 28 and the lightning arrester 29 are accommodated.

The main circuit power introduced from the line-side bus 20 via the bus-side disconnector 22 is guided from the connecting conductor 23 via the connecting conductor 30 to the circuit breaker 26, and further from the circuit breaker 26 to the line-side disconnector 27. Connected to the main circuit conductor 31. A ground switch 28 is connected from the main circuit conductor 31 through the branch conductor 32, and a lightning arrester 29 is connected through the connection conductor 33.

The main circuit conductor 31 is disposed in a device-side cylinder 34 having one side attached to the device container 17 and the other side penetrating the container 11 and projecting to the outside. It is arranged to be located outside. Thus, the main circuit conductor 31 is located in the lower part on the back side of the container 11.

The cylindrical tank body 12 is attached to the equipment side cylinder 34 in which the main circuit conductor 31 located in the lower part on the back side of the container 11 is disposed. A connection conductor 121 connected to the connection portion 31 a of the main circuit conductor 31 is disposed in the cylindrical tank body 12.

In each of the three phases, a cylindrical tank body 12, an overhead wire power receiving section tank body 14, a bushing 15 and a current transformer 16 are integrally connected. The connection conductor 121 in the cylindrical tank body 12 is connected to the power reception section conductor 141 disposed in the overhead wire power reception section tank body 14, and the power reception section conductor 141 is connected to the bushing conductor 151 disposed in the bushing 15. Yes. Each phase is supported by a gantry 35.

As shown in FIG. 6, the phase located on the inner side of the board as viewed from the rear side of the container is arranged in parallel to the vertical direction, and is located at the center located on the outer side of the board from the phase located on the inner side of the board. The phase is attached with an inclination of, for example, 15 degrees with the central axis of the cylindrical tank body 12 as a support shaft. Furthermore, the phase located on the outside of the panel from the central phase is attached with an inclination of, for example, 15 degrees with the central axis of the cylindrical tank body 12 as a support shaft. That is, the interphase pitch P is, for example, 15 degrees, and the interphase insulation distances Q1 and Q2 are Q1≈Q2, and a sufficient insulation distance is obtained. It should be noted that a sufficient insulation distance is obtained as the interphase insulation distance Q3 on the inner side of the panel.

By the way, the cylindrical tank body 12, the overhead wire power receiving unit tank body 14, the bushing 15 and the current transformer 16 are integrally connected. As shown in FIGS. The side cylinder 34 is fastened to the

flanges

12 a and 34 a by bolts 36 and nuts 37. Further, as shown in FIG. 7, the bolts 36 are arranged at a pitch of 15 degrees, for example, and the cylindrical tank body 12 can be attached at an arbitrary position such as 15 degrees or 30 degrees. That is, the integral structure of the cylindrical tank body 12, the overhead wire power receiving section tank body 14, the bushing 15 and the current transformer 16 can be tilted and attached to an arbitrary position.

Further, the connection portion 31a of the main circuit conductor 31 disposed inside the device-side cylinder 34 and the connection conductor 121 disposed in the cylindrical tank body 12 can be rotated by, for example, a tulip junction 38 as shown in FIG. It is connected to the. Various configurations can be applied to the tulip junction 38.

Also in the second embodiment, the cylindrical tank body 12 is attached to the lower part of the rear surface of the board, which is the bus bar position of the container 11, that is, the equipment side cylinder 34 in which the main circuit conductor 31 is arranged in the bus bar lead-out part 13. Since the overhead wire power receiving unit tank body 14, the bushing 15, and the current transformer 16 are disposed in the cylindrical tank bodies 12, respectively, the installation space in the height direction can be reduced.

Furthermore, in the second embodiment, the current transformer 16 is attached to the outer peripheral side of the overhead wire power receiving section tank body 14, so that the current transformer 16 can be attached and detached, and the maintainability can be improved. it can.

In each of the above-described embodiments, the case where the interphase pitch P is, for example, 15 degrees has been described. However, the present invention is not limited to this, and various changes can be made according to the device capacity or the allowable insulation distance. Of course.

In addition, within the scope of the present invention, the present invention can be freely combined with each other or can be appropriately modified or omitted.

The present invention is suitable for realizing a gas-insulated switchgear in which a bushing can be attached in any direction, and a current transformer can be easily attached, removed, and maintained.

Claims

A container containing necessary equipment, a cylindrical tank body provided in three phases on the back of the container, an overhead wire power receiving unit tank body provided on each of the cylindrical tank bodies, and the overhead wire power receiving unit tank A gas-insulated switchgear comprising: a bushing provided on each of the bodies; and each of the cylindrical tank bodies is configured to be attachable to an arbitrary position in a circumferential direction.
2. The gas insulated switchgear according to claim 1, wherein the cylindrical tank body is provided on a lower back side of the container.
3. The gas insulated switchgear according to claim 1 or 2, wherein the cylindrical tank body is disposed in a bus lead-out portion of the container.
The gas insulated switchgear according to claim 3, wherein the bus lead-out portion of the container is a main circuit conductor.
The gas insulated switchgear according to any one of claims 1 to 4, wherein a current transformer is disposed on an outer peripheral side of the overhead wire power receiving unit tank body.