JPS63121409A - Gas insulated switchgear - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

[Detailed Description of the Invention] [Field of Industrial Application] This invention is applicable to instrument transformers (hereinafter referred to as MOF) of gas insulated switchgear (hereinafter referred to as GIS) used in extra-high power receiving and substation equipment of general consumers. This relates to the arrangement and configuration of connection busbars.

[Conventional technology]

Figures 5 and 7 are, for example, from Mitsubishi Electric Technical Report (vog 52-
NO12, p 924. Fig. 7 is a layout configuration diagram of extra-high power receiving and substation equipment in the conventional gas insulated switchgear (GIS) shown in 1978), and the air circuit configuration is shown in Fig. 5.

@ In Figures 5 and 7, (1) is the power supply lead-in part, (2)
is the power supply side bus of the instrument transformer (MOF), (3) is the MOF
F main body, (4) is the MOF load side bus, (5) is the main transformer, (7) is the MOF connection part, and as shown in the figure, the MOF
The busbar connected to the main body (3) is the power supply side busbar (2) of the MOF.
) and the load side busbar (4) of MOF', and are each composed of separate busbars.

Next, the operation will be explained. The electrical circuit of the MOF section is as shown in Figure 113, and is measured using the double force meter method in a three-phase AC circuit, consisting of three transformer phases and two current transformer phases. The conductor and the conductor on the load side are at the same potential. In Figure 3, the U and W phase current paths are connected from the MOF power supply side bus 12) to the MOF main body (3).
It enters the power supply side terminal (hereinafter referred to as the side terminal) and passes through the MOF and the load side terminal of the same phase (hereinafter referred to as the L side terminal).
and flows to the load-side bus (4) of the MOF.

Furthermore, the potentials of the side terminal and L side terminal of the MOF body (3) are as follows.

is the isopotential.

Also, since the V phase is only used as a 6-phase transformer,
The flow path does not pass through the MOF main body (3), but direct current flows from the MOF power supply side bus (2) to the MOF load side bus (4). In combination,
The transformer phase within the MOF is connected. The arrangement of a conventional GIS configured to connect to the MOF main body as described above is shown in FIGS. 5 and 7.

[Problem that the invention seeks to solve]

Since conventional GIS is configured as above, MO
The power supply side bus (2) of F and the load side bus (4) of MOF are
Each of these is required separately, and there are also problems such as an increase in the GIS installation space and an increase in manufacturing costs.

This invention was made in order to solve the above-mentioned problems.The power supply side conductor and load side conductor of the same phase are cylindrical, and reciprocating conductors are arranged almost concentrically on the outside and inside on the same axis. By configuring this, the MOF power supply side bus line and the load side bus line are integrated into a reciprocating bus bar and a more compact GIS configuration, and the purpose is to obtain inexpensive and highly reliable power receiving and transforming equipment.

[Means for solving problems]

The GIS according to this invention has a connection bus line with the MOF.
The power supply side bus of MOF' and the load side bus of MOF' are integrated using a reciprocating amount of 11.

[Effect]

The GIS in this invention has a configuration in which the power supply side bus bar and the load side bus bar are connected by an integrated reciprocating bus bar, thereby making it possible to reduce the body diameter of the container of the bus line conduit. The number of can be reduced.

[Embodiments of the invention]

Embodiment 1 of the present invention will be described below. In the Igl (a) diagram, (la) is the power supply inlet point side conductor, (5
a) is the transformer side (load side) conductor, (8a) and (8b) are the outer conductors of the reciprocating conductor, and (8c) and (8d) are the inner conductors of the reciprocating conductor.

(8e) and (8f) are insulators that insulate the outer conductor and inner conductor.
The installation is fixed on the b) side. (8h) is a gasket for maintaining airtightness, and (9) is an insulating spacer, which has an IE phase groove phase conductor a) and is connected and fixed to the reciprocating conductor (8) via the (9a) It. It has a structure. αq is the sealed insulating gas.

(b) is a container for storing the above-mentioned insulating gas, each conductor, insulating spacer, etc. @ is a seal for airtightness.

a3 is a mounting bolt.

FIG. 1(B) is a sectional view taken along the line A-A in FIG. 1(B) of the INN.

Also,! Figures 4 and 6 show the GIS arrangement in the case of a reciprocating busbar (6) using a reciprocating conductor (8).

In the figure, C1] is the power supply lead-in part, and (6) is the reciprocating amount a[
+73 is the MOF connection part, (3) is the MOF main body, (4) is the MOF load side bus bar, and (5) is the transformer.

The reciprocating amount R (6) is composed of the reciprocating conductor (8), the insulating spacer (9), the insulating gas αQ, the container CI, etc. The insulating spacer (9) is shown in Figure @8 (A). As shown, two current phase conductors (9a) with a hole in the center and one sulfur positive phase conductor (9b) are connected with an insulating spacer (9).
) is cast at the same time, and a mounting hole (9C) and a packing groove (9d) are provided. As shown in Figure 1 (A), the connection state of the reciprocating conductor (8) is that the outer conductor (8b) is attached to the current phase conductor (9a) of the insulating spacer (9), and the inner conductor (8C) is an insulator. (8e) makes the outer conductor (8
b) Insulated and installed. Also, when classifying gas,
Install Patsukin (8h). Also, there is no hail in Figure 1 (a).

For voltage summation, the voltage phase conductor is directly attached to the voltage summation conductor (9b) with bolts.

Next, the operation will be explained. The electric circuit of the MOF is the same as the conventional product as shown in FIG.

The terminal on the second side and the terminal on the L side in the current phase of the MOF are at the same potential as explained in the operation of the conventional technology, and the amount R on the power supply side of the MOF is
(2) and the load side amount R (4) of the MOF are configured and arranged by the reciprocating busbar (6) in the @2 figure. @1 (A) Figure shows a partial cross section of the structure with reciprocating amount # (6). In Figure 3, the current path is from the source lead-in side conductor (1a) through the outer conductor (8a) of the reciprocating conductor (8), the outer conductor (8b) attached to the insulating spacer (9), and then the current phase conductor ( 9a), MOF
The current coming out from the side terminal of the main body (3) and the L side terminal is connected to the inner conductor (&) placed inside the insulating spacer (9).
) to the inner conductor (8d) of the reciprocating conductor (8) and the transformer side conductor (5a). (It is shown from the arrow [→] E in the figure.) Phase 2 is used only as a transformer phase, and phase 2 is a single conductor, although it is not shown in the figure.

The five conductors are housed in the container (6) together with the reciprocating conductor (8).

In addition, the insulating spacer (9) shown in Figure 1a) has a structure that allows the reciprocating conductor (8) to be connected to it, and can be used for gas separation to shorten MOF inspection time, or simply to support the insulation of the conductor. It can also be installed as

An embodiment in which the reciprocating busbar (6) as described above is used is shown in FIGS. 4 and 6f.

In addition, when the insulating spacer (9) is used for gas division, the structure of the current phase conductor part (9a) of the insulating spacer (9) is as shown in figure @t (a). Maintain airtightness by sealing.

In addition, in the above embodiment, the power supply lead-in side conductor (1a).

The outer conductors (8a) and (8b) are configured so that the transformer side (load side) conductor (5a) is connected to the inner conductor of the inner conductors (8c) and (8d), but the same thing can be done with the reverse connection. be effective. In addition, the insulating spacer (9) can be installed arbitrarily depending on the concept of maintenance and inspection and the arrangement configuration.
8) There is no difference in effectiveness when using 8.

Further, in the diagram @8 (a), the insulating spacer (9) has an oval shape and shows the shape of an embodiment of the spacer having three phases. 8(b) and 8(c) are a sectional view taken along line B-B and a sectional view taken along line C-C of FIG. 8(a), respectively. In Fig. 8, (9) is an insulating spacer, (9a) is a current phase conductor,
(9b) is the voltage summation conductor, and (9c) is the bolt mounting hole.

(9d) is a packing groove.

In addition, there are two 'IE flow phase circular phase conductors a), and a voltage sum conductor (
If 9b) is 1@, the same effect as in the above embodiment can be achieved regardless of the shape of the insulating spacer. In addition, the current phase conductor (9
Even if one a) is used, the effect will be slightly smaller, but
A similar effect can be obtained. Therefore @1f-(container in figure 1 (
The cross-sectional shape of (b) may be an oval shape, a circular shape, a quadrangular shape, or the like.

In addition, the current phase conductor (9a) in the insulating spacer (9)
) and the voltage summation conductor (9b) with their respective corresponding conductors, as shown in Example f of FIG. 1(A).
These (8a) and (8b) may be connected in a removable shape, or may be connected directly with bolts, etc.
Alternatively, a connection method may be used in which the conductor is directly welded.

The embodiment shown in FIG. 1 (a) is designed to be removable (as shown in FIG. 1(a)), which makes assembly and disassembly work easier and improves workability.

〔Effect of the invention〕

As described above, according to the present invention, the configuration of the MOF connection conductor is such that the power supply side bus of the MOF and the load side bus of the MOF are composed of reciprocating conductors, and the reciprocating bus bar has five conductors housed in the same container. As a result, the number of busbars connected to the MOF is halved, the device can be made cheaper, and a more compact GIS can be obtained.

[Brief explanation of the drawing]

Iglf A) Figure is a partial sectional view of a reciprocating bus bar according to Embodiment 1 of this invention, Figure 1 (B) is a sectional view of the A-A section of Figure 1 (A), and Figure 2 is a cross-sectional view of the reciprocating bus bar according to Embodiment 1 of the present invention. FIG. 3 is an electrical circuit diagram of a MOF section according to an embodiment of the present invention, and FIG. 3 is an electrical circuit diagram of a conventional MOF section.
Figures 4 and 6 are layout diagrams of a GIS according to an embodiment of the present invention, Figures 5 and 7 are layout diagrams of conventional GIs, and Figure 8 (A) is a layout diagram of a GIS according to the present invention. The plan view of the insulating spacer according to the embodiment, Figure @8 (B) and Figure @8 (C) are cross-sectional views taken along the lines BB and CC in Figure 8 (A), respectively. In Figure E, (6) is a reciprocating busbar, (8) is a reciprocating conductor,
(9) is an insulating spacer, and 0°C is a container. Note that the same reference numerals in each figure indicate the same or corresponding parts.

Claims (2)

[Claims] (1) In the gas-insulated switchgear in which the instrument transformer is installed, a cylindrical shape of the same phase is attached to the busbar that connects the instrument transformer connecting part and the part consisting of the circuit breaker, disconnector, earthing switch, etc. An insulated switchgear characterized in that it uses a reciprocating busbar having a reciprocating conductor with conductors arranged substantially concentrically on the outside and inside, and the reciprocating busbar is housed in a container. (2) The conductor portion of the insulating spacer installed in the middle of the reciprocating bus bar for the purpose of supporting the conductor and gas division, or the conductor portion manufactured separately from the insulating spacer and incorporated into the insulating spacer, The gas insulated switchgear according to claim 1, characterized in that an insulating spacer is installed to which a reciprocating conductor can be connected.