JPS6321404B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to power plant equipment, and particularly to improvements in extra-high switching equipment for power plants and the like.

BACKGROUND OF THE INVENTION Conventionally, extra-high switchgear equipment installed in power plants, etc., has a configuration as shown in the single-line diagram in FIG. 1. In the figure, a predetermined plurality of generators 1 constitute a generator group 2, and each generator 1 has a step-up transformer 3.
are connected via the first main circuit 4, and a predetermined plurality of transformers 3 constitute a transformer group 5. Input disconnector 7 in each transformer 3 and extra-high switching equipment 6
are connected by a second main circuit 8.
The extra-high switching equipment 6 includes an input disconnector group 7 and a disconnector group 9 connected by a redundant bus bar 10.
and a plurality of output sheath breakers 11 are integrally accommodated. This extra-high switching equipment 6 receives electric power from the second main circuit 8 via the input disconnector 7 and connects it to the disconnector 9 and the bus 10 connected in redundant mode corresponding to the duplication of the disconnector 9 and to the output It is sent out to the power transmission line 12 via the shield disconnector 11.

In the power plant equipment shown in Figure 1,
In order to secure the installation location for the generator group 2, it is necessary to separate the transformer groups 5 from each other as shown in Fig. 2. In this case, the second main circuit 8 will inevitably become longer, and extra-high switchgear equipment will be required. 6 and the transformer group 5 are geographically separated, the second main circuit 8 must be extended. A cable or the like is normally used as the second main circuit 8, but in the above case, the total length of this cable is extremely long, as shown in FIG.

Furthermore, the extra-high switching equipment in the power plant facilities shown in FIG. 1 and FIG. 2 also had the disadvantage of occupying a large space.

The present invention has been made to eliminate the above-mentioned conventional drawbacks, and an object of the present invention is to install extra-high switching equipment corresponding to the transformer group near the transformer group, and to install these extra-high switching equipment in the vicinity of the transformer group. The objective is to provide compact and economical power plant equipment by connecting the two with gas-insulated busbars.

In order to better understand the present invention, an embodiment of the present invention will be described below with reference to FIGS. 3 and 4.

FIG. 3 shows a single line diagram of the power plant equipment according to the present invention. In FIG. 3, unlike FIG. 1, extra-high switching equipment is provided for each transformer group. That is, for example, in the figure, the transformer group 5a is provided with extra-high switching equipment 6a, and the transformer group 5b is provided with extra-high switching equipment 6b. The extra-high switching equipment 6a includes a transformer group 5, an input sheath disconnector group 7, a disconnector group 9 connected by a redundant bus bar 10, and a plurality of output sheath disconnectors 11. It is accommodated. In addition, the extra-high switching equipment 6b includes a plurality of output shear disconnectors 11 from those accommodated in the extra-high switching equipment 6a.
Everything except for is housed together. The extra-high switching equipment 6a and 6b are arranged apart from each other, and a gas insulated bus bar 13 is placed between them.
are interconnected. The reason why this gas insulated bus bar 13 is used is that if cables were used, they would have to be installed in as many cables as there are transformers, and cable heads would be required at the connection between the gas insulated bus bar 13 and the bus bar 10 for the same number of cables. Although this is economically undesirable and physically more complicated, if the gas insulated bus bar 13 is used, it will be possible to make a one-to-one connection between the gas insulated bus bar 13 and the bus bar 10, and This is because the gas insulated bus bar 13 has a much larger electrical capacity than the bus bar 10.

FIG. 4 is a simplified block diagram of FIG. 3 showing one embodiment of the power plant equipment according to the present invention. By simply using the gas-insulated busbar 13, the second main circuit can be significantly shortened, and the space occupied by the extra-high-speed switchgear 6 in FIG. The big advantage is that it takes up less space.

Although the present invention has been described in the case where there are two transformer groups, it goes without saying that the present invention can be extended to large-scale equipment with three or more groups. Also, extra high opening/closing equipment 6a and 6
b is also a gas insulated switchgear.

As described above, according to the power plant equipment according to the present invention, the main circuit between the transformer and the extra-high switching equipment can be extremely shortened, and the power plant equipment can be downsized. Therefore, the economic effect is also extremely large.

[Brief explanation of the drawing]

Figure 1 is a single-line diagram showing conventional power plant equipment.
2 is a simplified block diagram of FIG. 1, FIG. 3 is a single line diagram showing power plant equipment according to the present invention, and FIG. 4 is a simplified block diagram of FIG. 3. 1... Generator, 2... Generator group, 3... Transformer, 5, 5a, 5b... Transformer group, 6, 6a, 6
b... Extra-high switching equipment, 8... Second main circuit, 10...
...Bus bar, 13...Gas insulated bus bar. Note that the same reference numerals in the figures indicate the same or corresponding parts.

Claims (1)

[Scope of Claims] 1. A plurality of generator groups arranged at a predetermined distance from each other, and a transformer arranged close to each of the generator groups and whose primary side is connected to each of the generator groups. A plurality of extra-high switchgear equipment that integrally accommodates a switch group connected to the secondary side of this transformer group and a bus bar commonly connected to this switch group, and these plural extra-high switchgear Power plant equipment comprising a gas insulated bus bar that interconnects bus bars in the equipment, and configured to be connected to a power transmission line via any one of the plurality of extra-high switching equipment. 2. The power plant equipment according to claim 1, wherein the extra-high switchgear is a gas-insulated switchgear.