KR820001294B1 - Gas termination support system - Google Patents

Abstract

The gas-insulated electrical appts. includes a vertically disposed air termination(10), a horizontally disposed gas-insulated transmission line(12), and a transition member(14) aligned with both the termination and the transmission line for interconnecting the transmission line to the termination. Supports(106) are utilized for spatially maintaining the termination in its location, and these supports are fixedly to the transition member and slidingly supported on a base(108). The sliding support compensates for linear thermal expansion of the transmission line while maintaining the support of the termination.

Description

Gas end supporter

1 is a front view of an electric apparatus according to the present invention

2 is a detailed view of a termination support device

3 is a plan view of a horizontally placed plate showing how thermal expansion is corrected.

The present invention relates to a gas insulated electrical device, in particular to a support device for gas-air termination. Compressed gas-insulated transmission lines are used on a fairly large scale, with increasing expectations of stability, road site problems for overhead lines, and the high power loads required by increasing metropolitan areas and power energy. The gas insulated transmission line is typically a hollow rig, an inner conductor disposed in the rig, a number of solid insulating spacers that support the conductor, and sulfur hexa fluoride in the enclosure to electrically insulate the inner conductor from the enclosure. Compressed gas such as). Gas barriers may be installed spaced along the length of the transmission line to isolate in multiple parts on the line and it is also known to install particle traps as described in US Pat. No. 3,515,939.

Most of the gas-insulated transmission lines installed up to now have been used as electric power plant starters or high voltage transmission line dips. In this type of installation, the gas insulated transmission line is connected to an overhead power line that transmits the desired energy. The connection of the gas insulated transmission line to the overhead wire is usually carried out through the gas-air termination. These terminations are typically installed at high ground at the end of the overhead transmission line so that the terminations are placed vertically above the ground. Vertically arranged terminations are then always connected to the gas-insulated transmission line and the gas-insulated transmission line is generally arranged horizontally in most installations.

One drawback found in this type of installation is the need for support for elevated gas-air terminations. Since the termination is installed on the ground, a support structure is inevitably used to support the termination in the space. The problem is that horizontally arranged transmission lines are in transverse or horizontal motion due to the thermal expansion of the lines themselves. Therefore, support for air terminations must provide vertical support for the terminations or allow for horizontal or lateral movement to compensate for thermal expansion of the transmission line.

In general, the structure of the prior art used to support gas-air terminations is an elevated structure, which has a large outlet at its peak. This structure is arranged horizontally lower than the termination and extends through the outlet of the support structure and has transmission line connections to the transmission lines to be arranged horizontally. The outlet of the support structure is larger than the transmission line and is greater than the distance that allows sulfur movement of the connection due to the horizontal expansion of the transmission line itself. The end shell is then based on the support structure to maintain its raised position.

The drawback to this type of support is the high cost. In addition, when the phase of a three-phase transmission system is isolated for normal air separation from the overhead transmission line, a clear structure must be used. The construction and material costs required for such a structure are expensive, and therefore, a more economical support device is desirable to support the gas-air termination.

According to the present invention, a gas insulated electric device comprises a gas insulated end portion composed of a hollow insulated sheath and disposed vertically, a termination conductor disposed in the insulated sheath, a support device for supporting a termination conductor in the insulated sheath, A first insulating gas disposed in the insulating sheath to electrically insulate the termination conductor from the insulating sheath, a gas insulated transmission line consisting of a sheath and horizontally arranged, an inner conductor disposed in the sheath, the inner conductor in the sheath A supporting device for insulating and supporting the insulation, a second insulating gas disposed in the enclosure to electrically insulate the inner conductor from the enclosure, a first end of which the ends are arranged, and a second end of which is arranged together with the transmission line. A gas-insulated transition member, the outer being fixedly mounted at a first end of the insulating sheath and a second end of the sheath The transition member comprising a housing, a transition conductor disposed in the outer housing and fixedly mounted at a first end with respect to the terminal conductor and at a second end with respect to the inner conductor, and disposed in the outer housing to provide the transition conductor with the A third insulating gas that electrically insulates from the outer housing, a device for supporting the end composed of a foundation, a frame member fixed to the outer housing and extending outwardly therefrom, the frame member being slid onto the base It is composed of a device that supports it.

Conveniently, the gas-insulated transition member has an end and an end arranged with the transmission line. The outer members of each part are fixedly mounted to each other and the conductors arranged in the part are electrically connected. The end is supported by a support device, the support device being fixedly mounted to the base, the outer housing, the frame member extended to the outside and the sliding device for supporting the frame member on the base.

The invention will now be described by way of example in conjunction with the accompanying drawings.

FIG. 1 shows a vertically arranged gas-air termination 10, a horizontally arranged gas insulated transmission line 12 and a gas-insulated transition member 14. The gas insulated transition member 14 has first and second ends 16 and 18, respectively, wherein the first end 16 is arranged together with the end 10, and the second end 18 is gas insulated transmission. It is arranged in line 12.

The gas-insulated transmission line 12 insulates the inner conductor 22 in the cylindrical and hollow sheath 20, the inner conductor 22 disposed in the sheath 20 and the sheath 20. A support insulator 24 is spaced along the length of the transmission line 12 for supporting. The inner conductor 22 and the sheath 20 are both made of an electrically good conductive material such as aluminum and the inner conductor is typically at a higher potential than the grounded sheath 20. An insulating gas 26, typically sulfur hexafluoride, is provided in the enclosure 20 and electrically insulates the inner conductor 22 from the enclosure 20.

The gas-air termination 10 is disposed within the insulating sheath 32 extending in a hollow, the central terminating conductor 34 extending along the axis 36 of the insulating sheath 32 and the insulating sheath 32. It consists of an insulating gas 38, which can be sulfur hexafluoride.

Insulating sheath 32, which may be Porcelain or epoxy, has a number of skirts 40 along its outer surface 42 and typically has a conical inclined cross section. An insulating sheath 32 is mounted to the flange ring 46 at the end 44.

The flange ring 46 consists of a longitudinal continuous portion mounted to the base member 48 with a device such as a bolt 54 and a base member 48 which is generally planar and cylindrical, with a hollow 50 therebetween. The longitudinal continuous portion 52 is disposed adjacent to the outer axis surface 56 of the end portion 44 of the insulating enclosure 52. Adhesive 58 is disposed between longitudinal continuity 52 and end 44, wherein adhesive 58 mounts end 44 and thereby bonds insulating sheath 32 to longitudinal continuity 52. . The base member 48 and the longitudinal continuous portion 52 are made of an electrically conductive material and are typically ground potential. The corona ring 64 is provided on the base member 48 and the corona ring has a function of forming an electric field caused by the desired feed end conductor 34.

The upper hardware of the end 10 is a metal ring 66 bonded to the upper end 68 of the insulating sheath 32 and an upper end mounted to the upper end 72 of the ring 66 and the termination conductor 34. It consists of a metal cap 70. The upper cap 70 is also secured to the termination connector 74 to receive the end of an over head line that may be connected to the termination 10. Suitable corona rings 76 and 78 are connected to the metal cap 70 and are thus connected to the upper end 72 of the termination conductor 34 with wires 80 and 82. The lower corona ring 84 is connected to the longitudinal continuation 52 and is thus stopped by the support wire 86.

The transition member 14 is in the form of an elbow so that it is arranged with the end 10 of the first end 16 of the transition member 14 and the second end 18 is arranged with the transmission line 12. Be sure to

The transition member 14 includes an outer housing 90, a transition conductor 92 disposed in the outer housing 90 and an outer housing 90 to electrically insulate the transition conductor 92 from the outer housing 90. It consists of an insulating gas 94 which can be made of disposed sulfur hexafluoride. The outer housing 90 located at the second end 18 is fixedly mounted to the sheath 20 of the transmission line 12, and the transition conductor 92 located at the same end has an interior of the transmission line 12. It is fixed to the conductor 22. Such mounting can be achieved, for example, by welding the members together.

The outer housing 90 located at the other first end 16 may be fixedly mounted to the end 10 and more particularly through a housing associated with the end 10 or to achieve the desired elevation angle of the end 10. Via the continuous line 96 used is mounted directly on the base member. The continuous line 96 is arranged together with both the end 10 and the first end 16 of the transition member 14, and is mounted and fixed to the base member 48 at one end thereof, It consists of an outer enclosure 98 mounted to an outer housing 90 located at the first end 16. The continuous conductor 100 is disposed in the outer closure 98 and is mounted to the termination conductor 34 and the transition conductor 92. The insulating gas 102 is disposed in the outer closure 98 and electrically insulates the continuous conductor 100 from the outer closure 98. The insulating gas 102 located in the outer closure 98 may also be sulfur hexafluoride.

The continuous line 96 serves to provide an elevation angle necessary for the termination 10 to be disposed adjacent to the overhead line and when the continuous conductor 100 is used to mount the transition conductor 92 to the termination conductor 34. It is used to mount the outer housing 90 of the transition member 14 to the insulating shell 32.

Termination 10, continuous line 96, transition member 14 and transmission line 12 all use an insulating gas such as sulfur hexafluoride to electrically insulate the high voltage conductor from the grounded outer member. Insulation gas, which is present in each of these members, can be mutually communicated with the natural gas present in all other members. Alternatively, if desired, the insulating gas in a particular member can be separated from the insulating gas present in the other member, thus preventing contamination of adjacent members in the event of very rare high voltage breakdown. Thus, the choice of whether the gas should be delivered among the various members is chosen by the preference of the system designer.

In the case of correction for thermal expansion and growth of the transmission line 12 occurring in the direction indicated by arrow 104, the support device 106 provides support for the termination 10. The support device 106 consists of a foundation 108 physically mounted in its position, a frame structure 110 physically mounted in the outer housing of the transition member 14 and a frame structure 110 on the foundation 108. . The frame structure 110 consists of a plurality of metal chains 114, 116 welded to an outer housing 90 present in its spatial location and the ribs 114, 116 are transition members in the same manner as welding. It is physically mounted to a plate 118 that is disposed vertically lower than 14 and is generally disposed horizontally. As shown in FIGS. 2 and 3, the plate 118 has a number of horizontally extending slots 120 therein and the foundation 108 extends out of the base and out through the slots 120. It has a plurality of anchor bolts 122 that extend horizontally in the form of bolts to be rigid. The anchor bolt 122 has a collar 124 fixedly mounted at a lower position than the position of the plate 118 and a pad 126 is disposed between the cola 124 and the plate 118.

Plate 118 is on bearing pad 126 and is also prevented from anchoring bolt 122 vertically away by a device such as nut 128. Bearing pads 126, which may be made of a material such as Teflon, provide a flat surface so that plate 118 can slide along pad 126 while still being supported there.

The plate 118 and the anchor bolt 122 provide horizontal support for the end 10 and at the same time the transition member 14 and the end 10 of the transition member 14 due to a method such as thermal expansion of the transmission line 12. Allow horizontal movement. If the transition member 14 is moved horizontally, the frame structure 110 and mounted therein 118 also move horizontally. However, anchor bolt 122 remains fixed in position within base 108. Since the anchor bolt 122 extends through the slot 120, the plate 118 allows this horizontal movement, so that the plate 118 allows the anchor bolt 122 to remain in the slot 120. Even if it can be slipped. Horizontal support is provided by the coke 124 and the bearing pads 126.

As such, it can be seen that the device of the present invention provides support for gas to air termination, while also providing support for thermal expansion of interconnected transmission lines.

Claims (1)

A terminating conductor 34 in the insulation sheath 32 of the hollow insulation sheath 32 and a support device 106 for supporting the termination conductor in the insulation sheath, and an insulation sheath 32 to insulate the termination conductor 34. A gas insulated transmission line 12 having a first insulating gas in the c), a horizontally arranged sheath 20, and an insulation support device 24 and a sheath 20 for supporting the inner conductor 22 in the sheath. A second insulating gas for insulation between the inner conductor 22 and the second end 18 in line with the gas insulated transmission line 12, and a first end in line with the end 10; Vertically disposed with a gas insulated transition member 14 having a 16 and an outer housing 90 attached to an insulating sheath at the first end 16 and attached to the sheath at the second end 18. In an electrical device with a gas insulated termination (10), the transition conductor (92) is disposed in the outer housing (90) and the termination conductor (34) at the first end (16). It is fixed and fixed to the inner conductor 22 at the second end 18, the third insulating gas is disposed in the outer housing to insulate the transition member 14 from the outer housing 90, the base 108 and the outside And a device (120, 126) fixed to the housing (90) and having a device (120, 126) for slidingly supporting the frame member (110) on the base (108) extending outwardly from the base.

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