JPH0158725B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a gas insulated power substation device, and particularly to a gas insulated power substation device that is miniaturized.

FIG. 1 is a side view showing a conventional gas insulated power substation. FIG. 2 is a single line diagram of FIG. 1. In FIGS. 1 and 2, a transformer coil 1 is mounted on a magnetic core 2. In FIGS. The sealed container 3 houses the transformer coil 1 and is filled with an insulating gas such as SF ₆ gas. The switching device 4 is connected between the transformer coil 1 and the power cable 5 which is a line, and has a shear disconnector 40 that opens and closes the transformer coil 1 and the power cable 5.
1 and disconnector 402, an instrument current transformer 403 that detects the current flowing through transformer coil 1, an instrument transformer 404 that detects the voltage applied to transformer coil 1, and transformer coil 1 and ground. It is composed of a grounding device 405. Second sealed container 6
houses the switchgear 4 and is filled with an insulating gas such as SF ₆ gas. The bushing 7 is attached to pass through the second sealed container 6 and connects the cable end 501 of the power cable 5 and the switching device 4. The cable box 8 is made of metal such as an iron plate and is attached to the second sealed container 6, and electrically protects the cable end 501 from dust etc.
By preventing live parts such as the cable end 501 from being exposed, electric shock accidents are prevented. The bushing 9 is attached to the second sealed container 6 through it, and the primary bushing 10 is attached to the first sealed container 3 through it. A conductor 11 is connected between the bushing 9 and the primary bushing 10, connecting the switchgear 4 to the transformer coil 1. The bus duct 12 is made of metal such as an iron plate, and the conductor 11
The ends of the container are attached to the first and second sealed containers 3 and 6 to electrically protect the conductor 11, etc. from dust, etc., and to prevent live parts such as the conductor 11 from being exposed. This prevents electrical shock accidents. A secondary bushing 13 is mounted through the first sealed container 3 and is attached to the transformer coil 1
This is to extract the transformed electric power.

That is, the power supplied by the power cable 5 is applied to the transformer coil 1 via the switchgear 4, transformed by the transformer coil 1, and then taken out from the secondary bushing 13.

In the conventional gas-insulated power substation device configured in this way, the bus duct 12 that houses the conductor 11, which is the connection conductor between the transformer coil 1 and the switchgear 4, and the first and second sealed containers 3 and 6 are penetrated, respectively. Since the primary bushing 10 and the bushing 9 are required to be attached to each other, the device has drawbacks such as being large in size and having a large number of parts, making it expensive.

The present invention was made to eliminate the above-mentioned drawbacks of the conventional devices, and an object of the present invention is to provide a gas-insulated power substation device that is small in size, has a small number of parts, and is easy to maintain and inspect. Embodiments of the present invention will be described below with reference to the drawings.

FIG. 3 is a side view showing an embodiment of the gas insulated power substation device according to the present invention. In the figure, parts corresponding to those in FIG. 1 are given corresponding symbols. In FIG. 3, the transformer coil 1 and the switching device 4 are housed together in a single device container 3a.

Further, a partition wall 14 made of a single plate is installed in the sealed container 3a, and the sealed container 3a has a first chamber 3a1 on the transformer coil 1 side and a second chamber 3 on the switchgear 4 side.
The first room 3a1 is divided into a2 and a2.
The second chamber 3a2 is filled with an insulating gas such as SF ₆ gas.
is filled with air. As a result, both devices can be inspected individually, and since the switchgear, which is generally inspected frequently, is air-insulated, inspection becomes extremely simple.

A bushing 15 is installed through the partition wall 14 and electrically connects the switchgear 4 and the transformer coil 1 via this bushing 15.

As described above, according to the present invention, the transformer coil and the switchgear are housed in a single sealed container, and furthermore, the transformer coil and the switchgear are housed within the sealed container by a partition wall made of a single plate. Since the partitions are gas-insulated and air-insulated, the bus duct 12 and the primary bushings 10 and 9 of the conventional device shown in FIG. 1 are not required, making the device compact and the number of parts reduced. This has the effect of being inexpensive, and making it easier to inspect switchgears, which are inspected more frequently than transformers.

[Brief explanation of drawings]

FIG. 1 is a side view showing a conventional gas insulated substation, FIG. 2 is a single line diagram of FIG. 1, and FIG. 3 is a side view showing an embodiment of the gas insulated substation according to the present invention. In the figure, 1 is the transformer coil, 2 is the magnetic core, and 3
a is a sealed container, 3a1, 3a2 are the first and second chambers, 4
1 is a switchgear, 5 is a power cable, 14 is a partition wall, and 15 is a bushing. Note that corresponding parts in the drawings are designated by corresponding reference numerals.

Claims (1)

[Claims] 1. A transformer coil attached to a magnetic core and a switchgear connected between the transformer coil and the line are housed in a single sealed container, and the sealed container is placed in a first chamber on the transformer coil side. and a second chamber on the switchgear side, and a partition wall made of a single plate is provided in the sealed container, and a bushing for electrically connecting the transformer coil and the switchgear is provided through the partition wall. , and the first chamber is filled with an insulating gas such as SF ₆ gas to insulate the transformer coil, and the second chamber is filled with air to insulate the switchgear with air. Gas insulated substation equipment.