JPH0626445B2 - Gas insulated substation - Google Patents

Description

The present invention relates to a gas-insulated substation device installed in an electric station such as a substation.

[Prior Art] In a substation using a gas-insulated transformer, the transformer and the line are connected via a gas-insulated switchgear.
Conventionally, a gas-insulated transformer and a gas-insulated switchgear are provided separately, and the two are connected via a gas-insulated bus line or cable.

[Problems to be Solved by the Invention] As described above, in the conventional substation equipment, since the transformer and the switchgear are provided separately, there is a problem that the electric station becomes large and requires a large installation space. there were. If the transformer and switchgear are to be connected by gas-insulated bus lines, it is necessary to perform centering of the bus bar conductors and vacuuming of the lines in order to connect the pipes on site. It was necessary and there was a problem that the installation work in the field was very troublesome. Also, when connecting the transformer and the switchgear via a cable, it is necessary to connect the transformer and the switchgear on the site with a cable, which makes the installation work on site troublesome. there were.

An object of the present invention is to provide a gas-insulated substation device that facilitates downsizing of an electric station and facilitates on-site installation work.

[Means for Solving the Problems] In the present invention, a component of a switchgear such as a circuit breaker or a disconnector is attached to a plate constituting a side wall of a case of a gas insulated transformer, and the gas is placed on the plate. A gas-insulated switchgear connected to an insulation transformer was constructed, and the components of the gas-insulated switchgear were arranged in the gas space inside the case of the gas insulation transformer.

In the present invention, the device constituting the gas-insulated switchgear may be attached only to the plate constituting one side wall of the transformer case, and the gas-insulated switchgear may be attached to each of the plates constituting two or more side walls. You may make it attach the apparatus which comprises an apparatus.

[Advantageous Effects of the Invention] With the above-described configuration, the gas-insulated transformer and the gas-insulated switchgear are arranged in the common gas space, so that the space can be effectively used and the gas-insulated transformer and the gas-insulated transformer are gas-insulated. As compared with the case where the switchgear and the switchgear are separately provided, the equipment of the electric station can be downsized. Further, since it is not necessary to connect the transformer and the switchgear locally, it is possible to simplify the installation work on site.

Embodiments Embodiments of the present invention will be described below with reference to the accompanying drawings.

1 and 2 show an embodiment of the present invention, in which 1 is a case of a gas-insulated transformer formed in a box shape by a metal plate. A transformer main body T in which a primary winding 3 and a secondary winding 4 are wound around an iron core 2 in a case 1.
r is housed, and this transformer body is supported on a hollow frame 6 fixed to the bottom of the case 1.

In this example, one side wall 1a, 1b of the case 1 is arranged so as to hermetically close the frame-shaped peripheral portion 101 and the window portion formed inside the peripheral portion, and can be attached to and detached from the peripheral portion 101 by bolts. And a metal plate 102 attached to
The devices constituting the gas insulated switchgear GIS are attached to the surfaces of the metal plates 102 forming the side walls 1a and 1b in the case 1.

The equipment attached to the plate 102 forming one side wall 1a will be described with reference to FIG.
The circuit breaker CB, the disconnecting switches DS1 and DS2, and the grounding switches ES1 and ES2 for three phases are attached to the circuit 2. In this embodiment, the disconnecting switches DS1 and DS2 are arranged on both sides of the circuit breaker CB of each phase and are connected in series, so that the terminals on both sides of the circuit breaker CB can be grounded.
Is provided. The terminal of the disconnector DS1 on the side opposite to the breaker is connected to the terminal of the transformer body Tr via the conductor 10.

A cable lead-in port 103 for leading in a cable of each phase is provided in the lower portion of the frame-shaped peripheral portion 101. A cable head CHd is attached to the inner surface of the lower portion of the frame-shaped peripheral portion 101 so as to face the cable entry port, and the terminal of the cable head CHd is connected to the terminal of the disconnector DS2 opposite to the breaker CB.

On the outer surface of the plate 102 that constitutes the side wall 1a of the case 1, an operator box 11A that houses the operation mechanism of the disconnector DS1, and an operator box 11B that houses the operation mechanism of the earthing switch ES1.
An operation box 11C that houses the operation device of the circuit breaker CB and an operation box 11D that houses the operation mechanism of the ground switch ES2
And an operation box 11E containing the operation mechanism of the disconnector DS2
And 11A, 11B, 11D and 11E are connected to the connecting mechanisms 12A, 12 respectively.
Each device can be operated from the outside by being connected to the disconnecting switch DS1, the grounding switch ES1, the grounding switch E2 and the disconnecting switch DS2 via B, 12D and 12E. Further, the operation mechanism in the operation box 11C of the circuit breaker CB is the plate 102.
Is connected to the operating portion of the circuit breaker CB via a connecting rod (not shown) which is provided so as to penetrate in a gastight manner.

Similarly, a device constituting a gas-insulated switchgear is attached to the plate 102 forming the side wall 1b, and an operator box 13 accommodating an operation mechanism for operating the device is attached to the outer surface of the plate 102.

An air blower 14 is attached by penetrating a lower portion of the other side wall 1c of the case 1 in an airtight manner, and an electric blower 15 is provided inside the wind tunnel 14.

Further, a radiator 16 having an airtight structure is attached on the ceiling portion 1d of the case 1, and the gas inlet of the radiator 16 is communicated with the inside of the case at the ceiling portion of the case 1.

One end of the wind tunnel 14 located inside the case is connected to the space inside the pedestal 6, and the other end is connected to the radiator 16 via the conduit 17.
Is connected to the gas outlet. The gantry 6 includes side surfaces except the side surface to which the wind tunnel 14 is connected, and an upper surface (transformer body Tr
The gas flow hole 6a is provided on the side surface), and the gas sent by the blower 15 is sent to the gas insulated switchgear GIS side and the transformer main body Tr side through these gas flow holes.

The case 1 has an airtight structure, and SF ₆ gas is filled in the case at a predetermined pressure. Further, in this example, a gas circuit breaker using SF ₆ gas as an arc extinguishing medium is used as the circuit breaker CB, and the internal space of the container of the gas circuit breaker constitutes a gas space separate from the case 1.

The wind tunnel 14, the radiator 16 and the pipe 17 constitute a cooling device, and the gas sent into the pedestal 6 by the blower 15 is sent to the transformer body Tr and the gas insulated switchgear GIS side through the gas flow holes 6a. Equipment is cooled. The gas warmed by the device flows into the radiator 16 to be cooled, and is again introduced into the case by the blower 15.

With the above-mentioned configuration, since it is sufficient to assemble the entire device at the factory, carry it to the site, and pull in the cable, the installation work at the site can be simplified. Also, since the gas-insulated transformer and the gas-insulated switchgear are arranged in the common gas space,
The space can be effectively used, and the substation equipment can be constructed in a small size. Further, since the cooling device for the gas transformer can be used also for the gas insulated switchgear, it is possible to increase the energizing capacity of the components of the gas insulated switchgear.

In the above embodiment, the two side walls 1a, 1 of the transformer case are
Each of the devices constituting the gas-insulated switchgear is arranged in b, but if all the devices constituting the gas-insulated switchgear can be arranged only on the plate constituting one side wall, only one side wall is provided. As the structure having the detachable plate 102, the device of the gas insulated switchgear may be attached to the plate 102.

As described above, according to the present invention, since the gas-insulated transformer and the gas-insulated switchgear are arranged in the common gas space, the space can be effectively used, and the gas-insulated transformer and the gas-insulated transformer can be effectively used. Compared with the case where the insulating switchgear is separately provided, the equipment of the electric station can be downsized. Further, since there is no need to perform the work for connecting the transformer and the switchgear on site, there is an advantage that the installation work on site can be simplified.

[Brief description of drawings]

1 and 2 are a sectional view and an exploded perspective view showing an embodiment of the present invention, respectively. 1 ... Transformer case, 102 ... Plate forming side wall of case, Tr ... Transformer main body, GIS ... Gas insulated switchgear, DS1, DS2 ... Disconnector, ES1, ES2 ...
Ground switch, CB ... Circuit breaker, CHd ... Cable head.

Claims (3)

[Claims] 1. A gas-insulated switch which is connected to a gas-insulated transformer on a plate which constitutes a side wall of a case of a gas-insulated transformer, and which is provided with a switchgear or disconnecting switch component equipment on the plate. A gas-insulated substation device comprising a gas-insulated switchgear, wherein components of the gas-insulated switchgear are arranged in a gas space inside a case of the gas-insulated transformer. 2. The gas insulated substation device according to claim 1, wherein the plate is detachably attached to the case. 3. The gas-insulated substation device according to claim 1, wherein the operating device of the gas-insulated switchgear is attached to the outside of the plate.