KR20140134537A - Connecting Structure of Main Conductor of GIS - Google Patents

Connecting Structure of Main Conductor of GIS Download PDF

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Publication number
KR20140134537A
KR20140134537A KR20130054566A KR20130054566A KR20140134537A KR 20140134537 A KR20140134537 A KR 20140134537A KR 20130054566 A KR20130054566 A KR 20130054566A KR 20130054566 A KR20130054566 A KR 20130054566A KR 20140134537 A KR20140134537 A KR 20140134537A
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KR
South Korea
Prior art keywords
conductor
main conductor
connection
gis
tank
Prior art date
Application number
KR20130054566A
Other languages
Korean (ko)
Inventor
이태영
Original Assignee
엘에스산전 주식회사
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by 엘에스산전 주식회사 filed Critical 엘에스산전 주식회사
Priority to KR20130054566A priority Critical patent/KR20140134537A/en
Publication of KR20140134537A publication Critical patent/KR20140134537A/en

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Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H31/00—Air-break switches for high tension without arc-extinguishing or arc-preventing means
    • H01H31/02—Details
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H33/00—High-tension or heavy-current switches with arc-extinguishing or arc-preventing means
    • H01H33/02—Details
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H33/00—High-tension or heavy-current switches with arc-extinguishing or arc-preventing means
    • H01H33/02—Details
    • H01H33/53—Cases; Reservoirs, tanks, piping or valves, for arc-extinguishing fluid; Accessories therefor, e.g. safety arrangements, pressure relief devices
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02B—BOARDS, SUBSTATIONS OR SWITCHING ARRANGEMENTS FOR THE SUPPLY OR DISTRIBUTION OF ELECTRIC POWER
    • H02B13/00—Arrangement of switchgear in which switches are enclosed in, or structurally associated with, a casing, e.g. cubicle
    • H02B13/02—Arrangement of switchgear in which switches are enclosed in, or structurally associated with, a casing, e.g. cubicle with metal casing
    • H02B13/035—Gas-insulated switchgear

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  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Installation Of Bus-Bars (AREA)

Abstract

The present invention relates to a structure of GIS main conductor connection. More specifically, both end portions of a conductor are formed in a plug-in type for GIS main conductor connection; connection by bolts is eliminated from the GIS main conductor connection; and thus electric field distribution is enhanced. According to an embodiment of the present invention, the structure of GIS main conductor connection includes: a tank having two open sides; spacers which close one side of the tank and are in the shape of a cup; connection conductors which are joined with inner sides of the spacers; guide pins which are fixated and installed on the center of a lower surface of the connection conductor; and the main conductor which is inserted and joined in the connection conductors to be able to slide on the connection conductors, and allows a pin hole in which the guide pin can be inserted to be formed on one end portion thereof. Each group of the spacer, the connection conductor, and the guide pin is formed on each side of the tank to be symmetrical to each other. Both end portions of the main conductor is inserted and joined in the connection conductors to be able to slide on the connection conductors.

Description

GIS main conductor connection structure {Connecting Structure of Main Conductor of GIS}

[0001] The present invention relates to a GIS main conductor connection structure, and more particularly, to a GIS main conductor connection structure in which both ends of a main conductor are configured in a plug-in manner in a GIS main conductor connection, And more particularly to a GIS main conductor connection structure in which the distribution is improved.

In general, a gas insulated switchgear is installed between the power supply side and the load side of an electric system, and when a circuit is opened or closed in a normal current state, or when an abnormal current such as a short circuit or a short circuit occurs on the circuit, To protect the power system and the load device. These gas insulated switchgear (GIS) devices are generally classified into bushing units, disconnection switch / earthing switch (DS / ES), gas circuit breaker, bus disconnection switch (DS / ES) / Earthing Switch), a moving part, and a control part.

The main conductor used in the conduction path of the above-mentioned ultra-high voltage equipment is located in the metal tank, and the shape is various according to each role. The path formed by such a main body is divided into units each consisting of a conductor assembly as one compartment. It is necessary to divide it into unit types divided into units for installation and maintenance. Components of such a unit may include a tank, a spacer, a conductor, a conductor connector, and the like. This can be seen by referring to FIG. 1 of US Pat. No. 5,689,088 'GAS INSULATED DEVICE, GAS INSULATED SWITCHGEAR, GAS INSULATED BUS LINE, AND CABLE DIRECT-COUPLED GAS INSULATED SWITCHGEAR'. In this invention, spacers 20 and 21 for partitioning cylindrical tanks 10, 11 and 12, tanks 10, 11 and 12 and tanks 10, 11 and 12, supported by spacers 20 and 21, (30, 31, 32) passing through the conductors (30, 31, 32), and conductor connecting ports (40, 41) connecting the conductors (30, 31, 32).

Figure 1 shows a prior art GIS conductor connection. 1, the GIS conductor connection portion is largely composed of a tank 1, a spacer 2, a conductor 3, a shield 4, a fixing bolt 5, and the like. The assembly process of the GIS conductor connection portion according to the related art is as follows. First, before the conductor 3 is assembled to the spacer 2 by means of the bolts 5, the shield 4 is inserted into the conductor. The conductor (3) fitted with the shield (4) is fixed with the bolts (5). Fix the shield (4) using a fixing bolt (not shown).

However, in the prior art, there is a problem in that the electric field distribution between the conductor 3 and the tank 1 is poorly formed due to the fixing bolts 5, and a ground fault may occur between the grounds. In this way, the shield 4 may be used to improve the electric field deteriorated by the bolts 5 exposed to the outside. The use of the shield 4 improves the electric field deteriorated by the fixing bolt 5, but the fixing of the shield 4 is also coupled by the fixing bolt, so that the electric field distribution may still deteriorate.

On the other hand, in consideration of the thermal expansion property of the conductor 3, one end of each end is fixed in a plug-in form so as to be able to slide. This asymmetrical design causes difficulties in maintenance and economical efficiency due to an increase in the number of parts required.

SUMMARY OF THE INVENTION The present invention has been conceived to solve the above-described problems, and its object is to provide a GIS main conductor connecting structure in which both ends of a conductor are constituted by a plug-in method, GIS main conductor connection structure.

A GIS main conductor connection structure according to an embodiment of the present invention includes: a tank having both sides opened; A cup-shaped spacer which closes and connects one side of the tank; A connection conductor coupled to the inside of the spacer; A guide pin fixedly installed at the center of the lower surface of the connecting conductor; And a main conductor slidably inserted into the connection conductor, the main conductor being formed at one end thereof with a pinhole into which the guide pin can be inserted, wherein the spacer, the connection conductor, and the guide pin are formed at the both sides of the tank And both ends of the main conductor are slidably inserted into the respective connecting conductors.

Here, a wear ring may be interposed between the connection conductor and the main conductor.

In addition, sealing grooves are formed between the connecting conductor and the main conductor on surfaces facing each other along the circumferential direction, and seals are fitted in the sealing grooves.

Further, the seal may be formed as a spring type to increase the adhesion between the connection conductor and the main conductor.

According to the GIS main conductor connection structure according to the embodiment of the present invention, both ends of the conductor are configured in a plug-in manner in the GIS main conductor connection, and the coupling due to the bolt is removed, thereby improving the electric field distribution have. In addition, there is an effect that the kinds of parts are reduced, the productivity is improved, and the economical efficiency is increased.

1 is a cross-sectional view of a conventional GIS main conductor connection structure.
2 is a cross-sectional view of a GIS main conductor connection structure according to an embodiment of the present invention.

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, preferred embodiments of the present invention will be described with reference to the accompanying drawings, which are intended to illustrate the present invention in a manner that allows a person skilled in the art to easily carry out the invention. And does not mean that the technical idea and scope of the invention are limited.

A GIS main conductor connection structure according to an embodiment of the present invention includes a tank 10 having both sides opened; A spacer (20) which closes and engages one side (11) of the tank (10); A connection conductor 30 coupled to the inside of the spacer 20; A guide pin 40 installed at the center of the lower surface of the connection conductor 30; And a main conductor 50 slidably inserted into the connection conductor 30 and having a pin hole 52 into which the guide pin 40 can be inserted.

2 is a cross-sectional view of a GIS main conductor connection structure according to an embodiment of the present invention. The GIS main conductor connection structure according to an embodiment of the present invention will be described in detail with reference to the drawings.

The tank 10 is generally made of metal, which encloses the housing to accommodate the components of the present invention. Although there is no restriction on the shape, it is preferable to be formed into a cylindrical shape in consideration of favorable internal electric field distribution and the like. SF6 gas (sulfur hexafluoride gas) can be charged in the tank for insulation.

Spacers (20) are provided on both sides of the tank (10). The spacer 20 is divided into a unit forming a single compartment together with the tank 10. In other words, each part of the substation is separated and separated for installation, operation and maintenance. The spacer 20 supports the main conductor 50, which will be described later, installed inside the tank 10 to transfer electric current. Conical spacers may be used to enhance the bearing capacity.

The spacer 20 should satisfy the following electrical and mechanical characteristics. First, SF6 gas to be filled in the tank 10 must have a surface length that can secure sufficient insulation from the electrically grounded tank 10, and the characteristics thereof are lowered at irregular electric field strength. Therefore, the entire surface of the spacer 20 So that a maximum electric field strength is not generated between the spacer 20 and the main conductor 50. In addition,

Structurally, there is no defect such as bubbles or foreign matter inside the spacer 20, and it is possible to withstand the mechanical stress such as the main axis, bending and shearing stress and the initial filling pressure of the filled SF6 gas , Mechanical strength that can withstand arc rising or rising pressure due to temperature rise, and heat resistance to temperature rise of conductor.

The connection conductor 30 is attached to the spacer 20 to receive the support of the spacer 20 and to support the main conductor 50 to be described later. The connecting conductor 30 is formed in a cup shape. A plurality of coupling holes 31 are formed on the lower surface of the connection conductor 30. The connecting conductor 30 is coupled to the spacer 20 by a bolt 35 which is inserted into the spacer 20 through the coupling hole 31. The connecting conductor 30 is formed of a conductor having good conductivity because it forms a conductive path.

A sealing groove 33 is formed in the side surface of the connecting conductor 30 along the circumferential direction inside. A seal 60, which will be described later, is fitted in the sealing groove 33.

The guide pin 40 is formed of a rod and is fixed at one end to a support hole 32 formed at the inner center portion of the lower surface of the connection conductor 30. The guide pin 40 supports the main conductor 50 coupled to the connecting conductor 30 and serves as a guide for the longitudinal expansion of the main conductor 50.

The main conductor 50 is a conductor of good conductivity, which is formed to an appropriate length. And may be formed into a cylindrical shape for an advantageous electric field distribution path. Both ends of the main conductor 50 are formed so as to be inserted into the connection conductor 30. That is, at both ends of the main conductor 50, the engaging protrusions 53 are formed along the circumferential direction inside the predetermined length, and the outer diameter of the end portion is formed smaller than the other portions. The main conductor 50 is supported in the longitudinal direction from the connecting conductor 30 by engaging the engaging step 53 of the main conductor 50 with the upper end of the connecting conductor 30. [ Hereinafter, the portion of the main conductor 50 extending from the latching jaw 53 to the end will be referred to as an inserting portion 55. The outer diameter of the insertion portion 55 of the main conductor 50 is equal to or smaller than the inner diameter of the connection conductor 30 so that the main conductor 50 is inserted into the connection conductor 30 and becomes slidable. Considering thermal expansion, a space is left between the end of the main conductor 50 and the lower surface of the connection conductor 30. [

At one end of the main conductor 50, a pinhole 52 is formed at the center. The guide pin 40 may be inserted into the pinhole 52.

The main body 50 insertion portion 55 is formed with a sealing groove 56 along the circumferential surface thereof.

The seal (60) is interposed between the main conductor (50) and the connecting conductor (30). By inserting the seal 60 between the main conductor 50 and the connecting conductor 30, the main conductor 50 and the connecting conductor 30 are subjected to a lateral supporting force and excellent resistance to shear stress.

A spring type seal may be applied so that the seal 60 can adapt to the case where the main conductor 50 receives heat and expands in the longitudinal direction.

The wear ring 70 intervenes between the main conductor 50 and the connecting conductor 30 to precisely guide the main wire 50 and absorbs a force generated between the main conductor 50 and the connecting conductor 30.

In addition to the role of the wear ring 70, the main conductor 50 and the connecting conductor 30 prevent the metal and the metal from contacting each other directly, increase the wear resistance, prolong the service life, and provide excellent frictional resistance . On the other hand, it prevents penetration of foreign matter, maintains the clearance gap, and concentrates the main conductor 50 at the center.

The connecting conductor 30, the guide pin 40, the seal 60 and the wear ring 70 except for the main conductor 50 are symmetrically and symmetrically connected to both sides of the tank 10, . Both ends of the main conductor 50 are slidably inserted into the connection conductor 30 in a plug-in type so that the installation work can be easily performed, and the kinds of the element parts are also reduced, thereby reducing the maintenance cost.

The assembly of the GIS main conductor connection structure according to the embodiment of the present invention will be described.

First, the spacer 20 is assembled to the tank 10.

The connecting conductor 30 is assembled to the spacer 20. The connecting conductor 30 need not be disassembled in the future.

A guide pin (40) is assembled at the center of the lower surface of the connecting conductor (30).

Assemble the seal (60) and the wear ring (70).

Finally, the main conductor 50 is assembled. As a plug-in type, it is assembled by pushing with force.

Since the main conductor 50 is inserted into the connection conductor 30, it is not necessary to use a bolt or the like for separate coupling, and the electric field distribution advantageously appears. At this time, the retaining jaws 53 of the main conductor 50 are subjected to the longitudinal supporting force by the side end portions of the connecting conductor 30, and are held between the outer surface of the main conductor 50 and the inner surface of the connecting conductor 30 The seals 60 and the wear rings 70 are subjected to the lateral supporting force. Here, the increase or decrease of the supporting force can be adjusted by machining the angles of the sealing grooves 33, 56 machined on the conductor differently.

Although the present invention has been described in connection with the above-mentioned preferred embodiments, it will be apparent to those skilled in the art that various modifications and variations can be made without departing from the spirit and scope of the invention, It is obvious that the claims fall within the scope of the claims.

10 Tank 20 Spacer
30 connecting conductor 31 coupling hole
32 Support hole 33 Sealing groove
35 bolt 40 guide pin
50 main conductor 52 pinhole
53 engaging jaw 55 insertion portion
56 Sealing groove 60 Seal
70 Wearing

Claims (4)

A tank with both sides open;
A cup-shaped spacer which closes and connects one side of the tank;
A connection conductor coupled to the inside of the spacer;
A guide pin fixedly installed at the center of the lower surface of the connecting conductor; And
And a main conductor slidably inserted into the connection conductor and having a pinhole into which the guide pin can be inserted,
Wherein the spacer, the connecting conductor, and the guide pin are formed on both sides of the tank, and both ends of the main conductor are slidably inserted into the respective connecting conductors.
The GIS main conductor connection structure according to claim 1, wherein a wear ring is interposed between the connecting conductor and the main conductor.
2. The GIS main conductor connection (1) according to claim 1, characterized in that sealing grooves are formed on the surfaces facing each other along the circumferential direction between the connecting conductor and the main conductor, and a seal is fitted in the sealing grooves rescue.
The GIS main conductor connection structure according to claim 3, wherein the seal is formed in a spring type so as to increase the adhesion between the connection conductor and the main conductor.
KR20130054566A 2013-05-14 2013-05-14 Connecting Structure of Main Conductor of GIS KR20140134537A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
KR20130054566A KR20140134537A (en) 2013-05-14 2013-05-14 Connecting Structure of Main Conductor of GIS

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Application Number Priority Date Filing Date Title
KR20130054566A KR20140134537A (en) 2013-05-14 2013-05-14 Connecting Structure of Main Conductor of GIS

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KR20130054566A KR20140134537A (en) 2013-05-14 2013-05-14 Connecting Structure of Main Conductor of GIS

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR20190019741A (en) 2017-08-18 2019-02-27 효성중공업 주식회사 Conductor connecting apparatus for gas insulated switchgear

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR20190019741A (en) 2017-08-18 2019-02-27 효성중공업 주식회사 Conductor connecting apparatus for gas insulated switchgear

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