JPS6260888B2 - - Google Patents

Description

[Detailed Description of the Invention] This invention relates to a gas insulated switchgear,
In particular, the present invention relates to a connection method for a busbar switching disconnector of a gas-insulated switchgear to which a so-called double busbar-to-shiba disconnection busbar method is applied.

A conventional gas-insulated switchgear with a double busbar and a breaker busbar system is shown in Figures 1 to 5.
The figure is a plan view, FIG. 2 is a side view, FIG. 3 is a plan view with the generatrix omitted, and FIG. 4 is a single line diagram. In the attached drawings below, parts for A phase are marked with A after the number and B.
Phase use is indicated by B, and C phase use is indicated by C.

In a conventional gas insulated switchgear, as shown in FIGS. 1 and 2, a set of first external drawer units are
For example, a bushing 1A connected to an overhead power transmission line (not shown), and a disconnector 2A connected thereto.
etc., a busbar switching disconnector connected to this disconnector, a disconnector 3A, etc., a busbar switching disconnector consisting of a first busbar switching disconnector 4A, etc., a second busbar switching disconnector 5A, etc., these first and Second busbar switching disconnector 4A
, 5A, etc. for each phase, and other connecting parts and current transformers (both not shown). The other set of second external draw-out units includes, for example, a cable head 7'A, etc., a cable breaker 3'A, etc., a first busbar switching disconnector 4'A, etc., and a second busbar switching disconnector. Vessel 5'A
etc., an intermediate connection section 10'A etc. that connects the first and second bus bar switching disconnectors 4'A, etc., 5'A, etc. for each phase, and other connections, such as It consists of parts and a current transformer (both not shown).

The first busbar switching disconnector 4A, etc., and the second busbar switching disconnector 5A, etc. of the first external drawer unit are arranged in parallel with each other, and are connected to the disconnector 3A, etc. They are connected via a connecting portion 10A and the like. The first busbar switching disconnector 4'A, etc. and the second busbar switching disconnector 5'A, etc. of the second external drawer unit are arranged in parallel with each other, and the Katsushiya disconnector 3'A, etc. They are connected via an intermediate connecting portion 10'A, etc. connected to the same. In addition, the first busbar switching disconnector 4A of the first drawer unit and the first busbar switching disconnector 4'A of the second drawer unit are connected to each other.
etc. are connected to the connecting portions 20A, etc., 20'A, etc., via the branch connecting portion 11A, etc. The second bus bar switching disconnector 5A etc. of the first drawer unit and the second
2nd busbar switching disconnector 5' of the drawer unit
A, etc. are connected via connection portions 21A, etc., 21'A, etc., branch connection portion 12A, etc.

The branch connection part 11A is vertically erected, and other branch connection parts 11B, 11C, and 12 which play the same role
A, 12B, and 12C are arranged in a line almost on the same straight line, and a set of first busbars 8A, 8B, and 8C are located above, middle, and below on one side of the line of branch connection parts 11A, etc. The first busbars 8A, 8B, 8C are connected to the branch connection part 11A, etc. and the first busbar switching disconnector 4.
A, etc., and the other set of second busbars 9A, 9B, 9C on the other side of the row are also arranged above, middle, and bottom like the first busbars 8A, 8B, 8C. It is located and arranged.

Further, as shown in FIGS. 4A, 4B, and 4C, the electrical connection between the branch connection portion 11A and the first bus bar 8A is such that the branch connection portion 11A is connected via the connection portion 22A, and the branch connection portion 11B is connected through the connection portion 22A. The branch connection part 11C is made through the connection part 22B and the connection part 22C, respectively. Although not shown, the branch connections 12A, 12B, and 12C are electrically connected to the second busbars 9A, 9B, and 9C, respectively.

Electrical connections are as shown in the single line diagram in FIG. In FIG. 5, A, B, and C representing each phase are omitted from the symbols.

The disadvantage of conventional gas-insulated switchgear is that the overall size of the gas-insulated switchgear is large in the direction of extension of the first and second busbars, that is, the J dimension in Figure 1. This means that the advantage of reducing the size of the substation was insufficient.

This drawback is evident from the plan view with the generatrix removed in FIG.
The busbar switching disconnectors 4A, 4B, 4C are connected to the second busbar switching disconnectors 5A, 5 of the same external drawer unit.
Intermediate connection part 10 is used to connect B and 5C within each phase.
A, 10B, 10C is used, and these intermediate connection parts 10A, 10B, 10C are sandwiched between the first and second disconnectors 4A, 5A, etc., and H in FIG. The dimensions shown are for the first and second busbar switching disconnectors 4A, etc.
In addition to the dimensions of A, etc., the intermediate connection parts 10A, 10
This is because the dimensions B and 10C are added together. That is, the intermediate connection portion 10A,
Since the dimensions 10B and 10C are included, there is a drawback that the dimension J in FIG. 1 becomes large. Further, the second external drawer unit also had the same drawbacks as the first external drawer unit.

This invention was made in order to eliminate the drawbacks of the conventional ones as described above.
By improving the connection method within each phase between the first busbar switching disconnector and the second busbar switching disconnector of the external drawer unit, the dimensions in the extending direction of the first and second busbars have been reduced. The purpose of this invention is to provide a gas-insulated switchgear.

The present invention will be specifically described below with reference to the illustrated embodiments. As shown in Fig. 6-8, the first busbar switching disconnector 4 of the first external drawer unit
A, etc. are respectively opposed to the first busbar switching disconnector 4'A, etc. of the second external drawer unit, and the second busbar switching disconnector 5A of the first external drawer unit is connected to the
etc. are disposed facing the second busbar switching disconnector 5'A, etc. of the second external drawer unit, respectively. The first busbar switching disconnector 4A etc. of the first external drawer unit and the second busbar switching disconnector 5
The end face of each of the shields A and the like on the side of the disconnector 3A is connected to the peripheral wall of the cylindrical intermediate connection part 10A and the like. The end faces of the first busbar switching disconnector 4'A, etc. and the second busbar switching disconnector 5'A, etc. of the second external drawer unit, and the end faces of the disconnectors 3'A, etc., are also cylindrical. It is connected to the peripheral wall of the intermediate connecting portion 10'A, etc.

By doing so, the arrangement distance in the extending direction of the first bus bar 8A between the first bus bar switching disconnector 4A and the second bus bar switching disconnector 5A of the first external drawer unit is In this direction, since there is no intermediate connection part 10A between the first busbar switching disconnector 4A and the second busbar switching disconnector 5A, it can be made very short.

Between the other first bus switching disconnector 4B and the second bus switching disconnector 5B, etc., and between the first bus switching disconnector 4'A of the second external drawer unit and the second bus switching The distance between the terminal and the disconnector 5'A can be similarly shortened. Then, H shown in FIG.
Since the dimensions do not include the dimensions of the intermediate connection parts 10A, 10'A, etc. of the first and second external drawer units, the interphase direction of each phase (extension of the first and second busbars 8A, 9A, etc.) In addition, the overall J dimension can be significantly reduced as shown in FIG. 6.

This has the effect of reducing the size of the gas insulated switchgear, and also reduces the size of the first and second busbars 8A, 8.
The overall length of B, 8C, 9A, 9B, and 9C can also be shortened, resulting in an economical gas-insulated switchgear.

[Brief explanation of the drawing]

Figure 1 is a plan view showing an example of a conventional gas insulated switchgear, Figure 2 is a side view of the switchgear in Figure 1, and Figure 3 is the first diagram with the first and second busbars removed. Figures 4A, 4B, and 4C are side views showing how the first and second busbars of the switchgear shown in Figure 1 are supported, and Figure 5 is a single line diagram of the switchgear shown in Figure 1. , FIG. 6 is a plan view showing one embodiment of the gas insulated switchgear according to the present invention, FIG. 7 is a side view of the embodiment of FIG. 6, and FIG. 8 is a side view of the embodiment of FIG. FIG. 2 is a plan view in which the generatrix No. 2 is omitted; 2A, 2B, 2C...Disconnector, 3A, 3B, 3
C, 3'A, 3'B, 3'C...Shiya breaker, 4A,
4B, 4C, 4'A, 4'B, 4'C...first bus switching disconnector, 5A, 5B, 5C, 5'A,
5'B, 5'C...Second bus switching disconnector, 8
A, 8B, 8C...first bus bar, 9A, 9B, 9
C...Second bus bar, 10A, 10B, 10C, 1
0'A, 10'B, 10'C...Intermediate connection part, 11
A, 11B, 11C, 12A, 12B, 12C...
...branch connection.

Claims (1)

[Scope of Claims] 1. A gas-insulated disconnect switch, a loop disconnector connected to this disconnect switch, and a loop disconnector connected to the loop disconnector via an intermediate connection and arranged in parallel with each other. and a busbar switching disconnector consisting of a first busbar switching disconnector and a second busbar switching disconnector, the first and second busbar switching disconnectors facing each other for each phase.
an external drawer unit, which is vertically installed between the first external drawer unit and the second external drawer unit, and to which the disconnector, the cable disconnector, and the busbar switching disconnector are connected. Branch connections for each phase arranged in a line in a straight line in a direction perpendicular to the direction, and positions above, in the middle, and below on both sides along the row of branch connections for each phase arranged in a line. A gas insulated switchgear comprising: first and second busbars of each phase, each of which is disposed as a busbar; An end face of the second busbar switching disconnector on the side of the bow disconnector is connected to a peripheral wall of the cylindrical intermediate connection portion arranged parallel to the first and second busbars. A gas insulated switchgear characterized by: