JPH05205954A - Gas-insulated electrical equipment - Google Patents

Abstract

PURPOSE:To lessen a gas-insulated electrical equipment in floor area and a housing building in height so as to decrease it in construction cost, and to improve an indoor transformer station in layout. CONSTITUTION:A unit gas insulated transformer 1, two single-phase gas- insulated reactors 2, a gas-insulated switch group 3 are installed on an upper story, two unit gas insulated transformer 1 and a single-phase gas-insulated reactor 2 are set up on a lower story, and gas-insulated buses 5 led out from the sides of the unit gas insulated transformer 1 and the single-phase gas- insulated reactor 2 are connected to the gas-insulated switch group 3.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a gas-insulated electric device which is divided into unit gas-insulated transformers, and a plurality of units are combined in a local building to form a three-phase unit or a single-phase unit. In particular, it relates to the layout of unit gas-insulated transformers that reduce the installation area and floor height.

[0002]

2. Description of the Related Art In recent years, due to an increase in power demand, substations are often constructed in underground floors of buildings in central Tokyo. The gas-insulated transformer installed in the substation is
Due to various transportation restrictions and increase in transformer capacity, multiple unit gas-insulated transformers are combined to form a single-phase transformer.
A combination of these three phases is used as a three-phase device.

FIG. 5 shows an example of installation of such a split transport type transformer and reactor. In the figure, the main transformer 1 and the reactor 2 are gas-insulated and divided single-phase units, and are arranged in a horizontal row.
In addition, a gas-insulated switchgear group 3 is arranged in parallel with the main transformer 1, the reactor 2, and a connection duct 4
The gas-insulated bus bar 5 is connected via A and 4B.

On the other hand, in order to reduce the installation area of a substation, there is an example in which a floor for installing a transformer and a floor for installing a gas insulation switchgear are provided separately.

[0005]

However, in the case of the split transport type main transformer and reactor, each single-phase device has an independent tank shape and a reinforcing structure, so that a plurality of these are installed in parallel and integrated. When assembled in the above manner, the extra space is created due to the reinforcement between the tanks, and the installation area is increased as a whole. In addition, since the connecting ducts 4A and 4B are provided, the height of the main transformer as a whole becomes very high, and a large floor height is required in consideration of on-site assembly work. However, it is extremely difficult to secure a large installation area in the city center where land prices are high, and as the floor height increases, the amount of underground excavation increases and civil engineering costs rise.

An object of the present invention is to eliminate the above-mentioned drawbacks, and to reduce the installation area, lower the floor height of the building to reduce the construction cost and improve the layout of the indoor substation. To provide electrical equipment.

[0007]

In order to achieve the above-mentioned object, the present invention provides a gas-insulated electric device in which a plurality of unit gas-insulated transformers are combined to form a three-phase device and which is connected to a gas-insulated closing device. , Unit gas-insulated transformers are distributed and installed in multiple layers, and each unit gas-insulated transformer is connected to a gas-insulated switchgear via a gas-insulated busbar.

[0008]

With the above-mentioned structure, the tank shape of the unit gas insulation transformer and the extra space due to the reinforcing structure can be eliminated, the installation area can be significantly reduced, the connecting duct can be eliminated, and the floor height can be reduced. it can.

[0009]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to the drawings. FIG. 1 is a plan view showing an arrangement in an upper layer of an embodiment of the present invention, FIG. 2 is a plan view showing an arrangement in a lower layer of an embodiment of the present invention, and FIG. 3 is shown in FIGS. The relevant cross-section is shown. First, in the upper layer 6 shown in FIG.
One unit gas insulation transformer 1 and two single-phase gas insulation reactors 2 are installed, and a gas insulation switchgear group 3 is installed in parallel on the same floor. Further, two unit gas insulation transformers 1 and one single-phase gas insulation reactor 2 are installed in the lower layer 7 shown in FIG. Here, the unit gas insulation transformer 1 installed in the upper layer 6 has its planar position installed in the lower layer 7 2
The single-phase gas insulation reactor 2 installed in the lower layer 7 in the middle of the unit gas insulation transformer 1 of the stand should be displaced in plan from the two single-phase gas insulation reactors 2 installed in the upper layer 6. To

However, the unit gas insulation transformer 1 and the single-phase gas insulation reactor 2 installed on the lower layer 7 have the gas insulation bus bars 5 drawn out from the respective side surfaces as shown in FIG. 3 on the ceiling (floor in the upper layer). And the gas-insulated busbar 5 drawn from each side of the unit gas-insulated transformer 1 and the single-phase gas-insulated reactor 2 installed in the upper-layer 6 and the upper-layer 6
Connected to the gas-insulated switchgear 3 installed in the.

According to the above construction, an extra space formed when a plurality of units are installed side by side can be reduced, and the required installation area of the substation is greatly reduced by the distributed arrangement of the upper and lower layers. be able to. Further, since the connecting ducts arranged above the unit gas insulation transformer and the single-phase gas insulation reactor of the conventional substation described above are not required, the floor height can be reduced accordingly.

In the above-described embodiment, the unit gas insulation transformer 1 is installed in two layers, the upper layer 6 and the lower layer 7, but the unit gas insulation transformer 1 is arranged as shown in FIG. The same effect as the above-described embodiment can be obtained even if the layers are distributed and installed in three layers of the layer 6, the lower layer 7, and the middle layer 8.

[0013]

As described above, according to the present invention, the unit gas-insulated transformer and the single-phase gas-insulated reactor are dispersed and installed in a plurality of layers, and the unit-gas-insulated transformer and the single-phase gas-insulated reactor are respectively installed. Is connected to the gas-insulated switchgear via the gas-insulated busbar, the substation installation area can be greatly reduced and the height of each floor can be reduced, which reduces construction costs and the layout of the indoor substation. It is possible to provide a gas-insulated electric device that can improve the above.

[Brief description of drawings]

FIG. 1 is a plan view showing an arrangement in an upper layer of an embodiment of the present invention.

FIG. 2 is a plan view showing the arrangement in the lower layer of the embodiment of the present invention.

FIG. 3 is a cross-sectional view related to FIGS. 1 and 2.

FIG. 4 is a sectional view showing another embodiment of the present invention.

FIG. 5 is a plan view of a gas-insulated electric device using a conventional unit gas-insulated transformer and a single-phase gas-insulated reactor.

[Explanation of symbols]

1 ... Unit gas insulated transformer, 2 ... Unit gas insulated reactor, 3 ... Gas insulated switchgear group, 5 ... Gas insulated busbar, 6 ...
Upper layer, 7 ... Lower layer, 8 ... Middle layer.

Claims (1)

[Claims] 1. In a gas-insulated electric device in which a plurality of unit gas-insulated transformers are combined to form a three-phase device and which is connected to a gas-insulated switchgear, the unit gas-insulated transformers are installed in a plurality of layers dispersedly. At the same time, the gas-insulated electrical equipment is characterized in that it is connected to the gas-insulated switchgear via a gas-insulated busbar.