JPH0333131Y2 - - Google Patents

Description

[Detailed Description of the Invention] [Purpose of the Invention] (Field of Industrial Application) The present invention relates to a closed type switchgear suitable for ultra-high voltage substations or switchyards.

(Prior art) In recent years, with the increase in demand for electricity in urban areas, closed type switchgears have been installed in narrow spaces near cities,
It is widely used to achieve harmony with the surrounding environment. In addition, sealed switchgears are increasingly being used for high voltage and
With the trend toward larger capacity, there is a demand for smaller installation space, improved seismic resistance, and simplified maintenance.

Figure 1 shows a single-line connection diagram for one line in a general multi-bus system.
The disconnector for BUS1, DS2 is the disconnector for main bus BUS2, DS3 is the line disconnector, and BG is the bushing.

FIGS. 2 and 3 show conventional examples in which the components corresponding to those shown in FIG. 1 are arranged, and the same reference numerals indicate the same components.

In Figure 2, the disconnector CB is arranged vertically, and the equipment such as the disconnector DS is arranged in two layers. Although the installation area can be reduced, the height of the equipment is high, and the components on the upper layer are Maintenance was inconvenient.

In addition, in Figure 3, the chopsticks and disconnector CB are arranged horizontally, and other switching equipment is placed on the axial extension of the chopper and disconnector CB, so the equipment height can be reduced and maintenance is relatively easy. Although it is easy to use, as the voltage and capacity have increased, the shield breaker CB has become longer and has multiple cuts, which has the disadvantage of significantly increasing the installation area. Another drawback was that it was inconvenient to inspect the breaker CB.

(Problem to be solved by the invention) In this way, in the conventional closed type switchgear,
It was not possible to reduce the height of the equipment and at the same time reduce the installation area.

This invention was created taking the above points into consideration.
The purpose of the present invention is to provide a closed type switchgear that can reduce the installation area, improve seismic resistance, and be easily maintained even when the component equipment has a high voltage and a large capacity.

[Structure of the idea]

(Means for solving the problem) In order to achieve the above purpose, in this invention,
In a vertically established tank filled with an insulating medium, a shingle section with a fixed side and a movable side electrode section that can be moved toward and away from the tank is housed. Two outlet portions for leading out of the tank to the outside of the tank are provided opposite to portions of the tank that are located on substantially the same plane perpendicular to the operating axis direction of the sheath section, and the sheath section is An operating device for approaching and separating is connected to a bus bar through a first disconnector to a first outlet of a shingle section disposed at an axial end of the tank, and a second outlet is connected to the busbar through a first disconnector. connected to the bushing via a second disconnector, the first disconnector;
A first outlet, a tank, a second outlet, a second disconnector, and a bushing are arranged linearly in substantially the same vertical plane orthogonal to the busbar, and the first and second
A disconnector is disposed on an extension line of the first and second outlet parts, and the fixed side electrode part is located on the operating axis of the shingle disconnection part at the end opposite to the operating device in the tank. The movable side electrode part is fixedly supported by a support insulator provided at the end of the tank, and the movable side electrode part is supported by a support insulator provided at an end on the operating device side in the tank on the operating axis of the sheath section. There is.

(Function) With this configuration, it is possible to reduce the installation area of devices such as disconnectors, reduce the length of the busbar in the axial direction and the direction orthogonal to the busbar, and reduce the installation area. No bending stress is applied to the support portion of the cross section.

(Example) First, before explaining the present invention, a specific example of a shingle disconnector suitable for use in the present invention will be explained with reference to FIGS. 4 and 5.

Figure 4 shows a point-off gas inlet and disconnector.Inside a vertical tank 1 that is filled with _SF6 gas and is at ground potential, there is a A sheath section 2 is housed along the tank 1, and the sheath section 2 is opened and closed by an operating device 3 disposed at a longitudinal end of the tank 1. This operating device 3 is housed in an operating mechanism case 4 that supports the tank 1.

The shingle section 2 is composed of a movable electrode section 2A and a fixed electrode section 2B, which are movable toward and away from each other in the axial direction of the tank 1 and are arranged opposite to each other. The movable electrode section 2A is supported via a support insulating cylinder 5 which is located on the operating axis of the shingle section 2 and is fixed to the end of the tank 1 on the side of the operating device 3. Further, the fixed side electrode section 2B is connected to the support insulator 6 fixed to the inside of the lid 1A which is located on the operating axis of the shingle section 2 and closes the end opening of the tank 1 opposite to the operating device 3. Fixed support. In other words, the support insulator 6, the fixed electrode section 2B, the movable electrode section 2A, the support insulator tube 5, and the operating device 3 are arranged substantially on the same axis.

The shroud breaker 2 is formed as a patch-shaped shredder, and connects and separates the movable contact 8, which is connected and driven via the insulating rod 7 by the operation of the operating device 3, to the fixed electrode portion 2B. . A patch chamber 11 is formed by a patch cylinder 9 that is driven integrally with the movable contact 8 during a power outage, and a patch piston 10 disposed within the cylinder 9.
The SF ₆ gas inside is compressed and sprayed onto the arc generated between the contacts to extinguish it. Reference numerals 12 and 13 refer to the outlet portions of the shingle section 2 which are disposed at the longitudinally intermediate portion of the tank 1 and facing each other on the same axis perpendicular to the longitudinal axis of the tank. From 12, a connecting conductor 14 whose one end is electrically connected to the movable electrode part 2A is connected to the insulating space 1.
5 and led out to the outside of the tank 1.
Further, from the other outlet part 13, a connecting conductor 16 whose one end is electrically connected to the fixed side electrode part 2B is guided parallel to the inner surface in the longitudinal direction of the tank 1, and then supported by an insulating space 17. 1 is derived to the outside. Here, the connection conductor 16 is connected to the tank 1
It goes without saying that they should be arranged with a distance necessary for insulation from the inner surface.

In the above embodiment, a gas shield disconnector with one disconnection point has been described, but the present invention can also be applied to a gas disconnector with two disconnections as shown in FIG. That is, as shown in FIG. 5, in which the same parts as those in FIG.
2-2 is the insulation distance L determined by the withstand voltage between the poles.
The two sheath sections 2-1 and 2-2 are connected in series inside the tank 1 in a configuration in which they are arranged side by side and separated by a distance. The two outlet terminals are outlet portions 12, which are disposed at the longitudinally intermediate portion of the tank 1 and facing each other on the same axis perpendicular to the axis of the tank 1;
13. Two sheath sections 2-1, 2
-2 has its movable side electrode portion 2A supported by supporting insulating cylinders 5, 5, respectively, and the fixed side electrode portion 2B is fixed to the lid 1A of the tank 1 by supporting insulators 6, 6.
The connecting conductor 1 is connected between the fixed side electrode parts 2B and 2B.
8 electrically connected in series. Reference numeral 14 denotes a connecting conductor whose one end is electrically connected to the movable electrode section 2A of one of the bow sections 2-1, and the other end is led out from the outlet section 12 through the insulating space 15.
19 is the movable side electrode part 2A of the other sheath section 2-2.
The connecting conductor has one end electrically connected to the connecting conductor, and the other end is led out from the outlet part 13 through the insulating space 17. The movable side contacts of the two shingle sections 2-1 and 2-2 are connected to a driving part such as an insulated rod by a connecting plate 20, and this connecting plate 20 is operated by a common operating device 3. I'm trying to make it happen. Thereby, the opening and closing of the two sheath sections 2-1 and 2-2 can be controlled simultaneously.

Next, an embodiment of the closed type switchgear of the present invention will be described using the gas shield and disconnector having the above-described configuration.

In FIG. 6, the same symbols as in FIGS. 2 and 3 indicate the same components. A shoring cutter in which the two outlets of the shoring section are provided on substantially the same plane on the side of the tank, which is orthogonal to the axial direction in which the shoring section opens and closes.
Place the CB vertically. On the other hand, main bus BUS1,
BUS2 are made parallel to each other, and one exit part 12
It is arranged on the side so as to be orthogonal to the exit direction of this exit part. Disconnectors DS1 and DS2 are placed on the main bus lines BUS1 and BUS2, respectively. A vertical disconnect switch is used as this disconnect switch. Shiya disconnector
One side of a disconnector DS1 is connected to the first outlet 12 of the CB via a connection bus 12a, and a disconnector DS2 is connected to the other side of the disconnector DS1 via a connection bus 12b. On the other hand, the second outlet part 13 of the disconnector CB has
One side of the disconnector DS3 is connected via the connection bus 13a, and the bushing BG is connected to the other side of the disconnector DS3. Here, disconnectors DS2, DS1, first and second
outlet 12, 13, disconnector CB, disconnector DS3,
As is clear from Fig. 6a, the bushings BG are arranged in a straight line in almost the same vertical plane orthogonal to the main bus lines BUS1 and BUS2, and also in Fig. 6b.
As is clear, the disconnectors DS1, DS2, and DS3 are arranged on the extension line of the two outlets 12 and 13 of the disconnector CB.

In this example, since the shield disconnector, which is the largest device among the devices constituting the closed type switchgear, is placed vertically, the length in the longitudinal direction of the device perpendicular to the main buses BUS1 and BUS2 is can be significantly reduced.

In addition, two outlet portions 1 led out from the sheath section 2
2 and 13 are provided to face portions of the tank 1 located on substantially the same plane perpendicular to the operating axis direction of the shingle breaker 2, so that the disconnect switch connected to the shingle breaker CB is
The installation level of equipment such as DS1, DS2 and bushing BG can be lowered, maintenance and inspection can be easily performed, and the earthquake resistance of the equipment can be improved.

Furthermore, disconnectors DS2 and DS1, the first outlet 1
2. Disconnector CB, second outlet 13, disconnector DS
3 and the bushings BG are linearly arranged in substantially the same vertical plane perpendicular to the main bus lines BUS1, BUS2, and the disconnectors DS1, DS2, DS3 are connected to the first and second outlets 12, 13, the installation length of the equipment in the direction perpendicular to the main bus lines BUS1 and BUS2 can be made the shortest.

Then, the movable side electrode part 2A and the fixed side electrode part 2
B is supported through supporting insulators 5 and 6, respectively, which are placed on the axis of motion of the sheath section 2. For this reason,
All tensile and compressive stresses generated during operation of the movable contact 8 are supplied by the supporting insulators 5, 6, and no bending stress occurs. Therefore, the movable side electrode part 2A and the connecting conductor 14, the connecting conductor 14 and the insulating space 1
5. Stable contact and separation of both electrode parts 2A and 2B is possible without unreasonable stress acting on the respective connection parts between the fixed side electrode part 2B and the connecting conductor 16, and between the connecting conductor 16 and the insulating space 17, The reliability of the breaker CB is improved.

[Effect of idea]

As explained above, in the present invention, the two outlet parts of the vertical shear cutter are provided opposite to the parts located on the substantially same plane of the tank orthogonal to the operating axis direction of the shear cutter, The equipment connected to both exits is arranged linearly in almost the same vertical plane including the shield disconnector, and the supporting insulation is arranged with both electrodes of the shield disconnector placed on the operating axis of the shield disconnector. To provide a highly reliable closed type switchgear that reduces the installation level of equipment such as a disconnector, reduces the installation area, and eliminates bending stress at the edges and sections of the disconnector because it is supported by a material. I can do it.

[Brief explanation of drawings]

Figure 1 is a single-line connection diagram for one line of a general multi-bus system, Figures 2 and 3 are side views showing conventional gas-insulated switchgear, and Figure 4a is the gas-insulated switchgear of the present invention. FIG. 4b is a plan view taken along the - line in FIG. 4a, and FIG. FIGS. 6a and 6b are a plan view and a front view of an embodiment of the present invention. 1...Tank, 2...Shin breaker, 3...Operating device, 4...Operation mechanism case, 12, 13...Outlet, BUS1, BUS2...Main bus, CB...Shin breaker , DS1, DS2, DS3...disconnector.

Claims (1)

[Scope of utility model registration request] In a vertically established tank filled with an insulating medium,
A shingle section with a fixed side and a movable side electrode part that can be moved toward and away from the tank in the axial direction is housed and arranged, and two openings are provided for leading out of the tank from this shingle section. a portion facing a portion of the tank that is located on substantially the same plane perpendicular to the direction of the operating axis of the shag section, and an operating device for moving the shingle section toward and away from the tank in the axial direction of the tank. The first outlet of the cutter configured to be disposed at the end is the first outlet.
The second outlet is connected to the busbar through a disconnector, and the second outlet is connected to the bushing via a second disconnector, and the first disconnector, the first outlet, the tank, and the second The outlet, the second disconnector, and the bushing are arranged linearly in substantially the same vertical plane orthogonal to the generatrix, and the first and second disconnectors are connected to the first and second outlet. The fixed side electrode part is fixedly supported by a supporting insulator provided on the operating axis of the shingle cut part and on the opposite end of the operating device in the tank, and the movable A closed type switchgear characterized in that a side electrode part is supported by a supporting insulator provided on the operating axis of the shingle cut part and provided at an end part on the operating device side in the tank.