KR820000681B1 - High voltage on-off device having insulating gas - Google Patents

Abstract

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Description

Gas Insulated High Voltage Switchgear

1 is a partial partial schematic diagram of a high-pressure switch device showing an embodiment of the present invention

2 is a diagram showing one divided part of a single-phase or multi-phase high-voltage switchgear for a dual bus system according to another embodiment of the present invention.

3 is a view showing a connecting portion connecting two bus bars as another embodiment of the present invention.

4 is another embodiment of the present invention, in which a divided part of an opening and closing device connected to a triple bus system is used for connecting overhead lines.

FIG. 5 is a view showing an embodiment according to the present invention of a part of a connection opening and closing device for a triple bus system same as that of FIG.

6 is a view showing an embodiment of the opening and closing portion for a double bus system with a bypass bus bar

The present invention relates to a single-phase or multi-phase high-voltage switchgear which is covered with metal capsules and insulated with high-pressure gas, and has a switchgear having adjacent pressure vessels separated from each other so that a gas for accommodating the high-pressure switchgear and other energizing parts passes through. It's about the type with the partition. Switchgear of this kind with case-coated single-phase and three-phase busbars is known from SIEMENS TECHNICAL, April 1966, P263-266, and in addition, a three-phase high-tension opening and closing with a capsule of this structure. The complete body of the apparatus is described in Siemens Gibo 1975 11 P723-725.

However, in the known apparatus, the switchgear and the energization component essential to the function are generally mounted separately in a plurality of containers having various shapes, and further, the inter-container is partitioned so that no gas passes through the main bus. It is essentially connected in series following the power supply lane row between the lead connector or the cable connector.

Therefore, there is a need for costly struts determined by the structure for a large number of flange connection points and various containers, which must be made to pass gas.

In addition, when a different basic circuit pattern is required for each of the divided portions, there is a problem in production.

This is because the possibility of changing the arrangement of the container or the capsule portion is remarkably limited.

In the case of a multiphase device, in particular, due to the arrangement of the conductive wires, since the device cannot be arbitrarily rotated, for example, the possibility of changing the requirements is severely limited.

Alternatively, it is also known from West Germany Patent No. 951,019 to arrange all switchgear and energizing parts of the divided part in a single container. However, the above structure has a drawback that the main body of the apparatus must be shut off in the failure, maintenance work and inspection work in one divided part. In other words, when using an insulating medium having a larger dielectric strength than air at atmospheric pressure, the insulating medium needs to be expelled, so that the insulation is reduced.絡) There is concern.

The three-phase high voltage switchgear, which has a part of the separation switch attributable to the busbar, is arranged in the container of the busbar, and the other part is mounted in the container of the power switch. Cradle SF ₆ insulated switchgear, for 110 KV to 245 KV. For example, if an accidental discharge that causes the contact of the disconnector occurs on the power disconnector, the equipment enclosed in the disconnector and the vessel, unless the bus, that is, the essential part of the device, is not in operation. Cannot be repaired.

The bus must be shut off at least during the repair of this disconnector, and therefore, in the case of the short bus system, in particular, the utilization in operation is restricted.

In the known apparatus, the power switch (parking breaker) is attached to an inherent pressure container which is different from the container of the current transformer, the operation ground switch and the equipment necessary for the connection side and partitioned according to the embodiment of the disconnecting device. In addition, the disconnectors, like the module disconnectors, each have a disconnecting unit in the frame of the power switch, are mounted in a current transformer, an operation ground switch, and a container of equipment necessary for the connection side, and are electrically connected in series and then disconnected. It is of

Therefore, the function of a disconnector will depend on the state of two different gas chambers.

It is an object of the present invention to provide a high pressure switch of the type described at the outset, which is forbidden to ensure the highest possible operating utilization by using a minimum number of containers or capsules.

The above object is based on the present invention, and all switchgear and energizing parts belonging to one bus bar are arranged in the first pressure vessel for each divided part, and the power switch (parking breaker), operation ground switch, current transformer And the energizing parts alternately connected to the equipment of the adjacent pressure vessels are arranged in the second pressure vessel for each divided part, and all the apparatuses and energizing parts (for example, disconnectors and cable connection terminals) on the connection side are disposed. , By connecting the overhead line connecting terminal, and in some cases, another grounding switch) in the third pressure vessel for each divided part.

According to the present invention, a failure in a branch (for example, a second container or a third container) may cause damage to the bus bar except for a very short time, i.e., until the bus terminal in the first container opens. One device can be manufactured using three basic container structures without affecting it. In particular, the production technology within the scope of the container configuration is simplified by the present invention.

The main parts of the installation work and the inspection work can be performed on the parts to be attached to the container as finished products.

According to the present invention, various devices, arrangements, and circuits for each divided portion can be realized in a particularly simple form using a few kinds of containers. That is, for the above purpose, it is only necessary to change the conductor arrangement and the arrangement of equipment in the same type of container.

Therefore, the problem of arranging different containers in various spatial relations by various circuit diagrams is avoided.

Another essential advantage of the present invention is that the number of divided compartments, and hence the number of sealed portions per divided portion, is suppressed to a small number, thereby significantly eliminating the risk of gas leakage and the reduction in the internal pressure associated therewith. In the high-pressure switchgear provided with the connection division part which connects a 2nd bus bar, when implementing the technical idea of this invention, you may remove a 3rd pressure container. When the high-pressure switchgear according to the present invention includes a capsule-coated high-pressure gas insulated transformer, the transformer can be coupled to each of the pressure vessels through a predetermined connection point.

In a particularly advantageous embodiment of the high-pressure opening and closing device according to the present invention, the second pressure vessel is configured in the form of a tube, and the axis of the tube is horizontal so that the vessel supports the first and third pressure vessels. Doing. Referring to the drawings, a high-pressure switching device and an operating mode thereof according to the present invention will be described.

The switchgear dividing portion shown in FIG. 1 is connected to one bus bar in common with the other dividing portions.

The single-phase or multiphase busbar 1 which can be covered by a capsule is provided with the metal capsule 2.

In the inner space 3 of the capsule 2, SF ₆ constituting the high-pressure gas insulator is filled with a pressure of 4 bar, for example.

The conducting wire of a bus bar system is supported by the capsule 2 via the support insulator (not shown).

The bus bar 1 itself and the switchgear, that is, the bus disconnector 4 and the energizing parts 5 and 6 are disposed in the first pressure vessel 7 constituted by the capsule 2. The pressure vessel (7), the power switch (9), the operation ground switch (10), (11), the current transformer (12) and the energizing parts (13), (14), (15), (16) of divided parts. Is coupled to the second pressure vessel (8), including () and (17).

A pressure vessel (8) of the second is made of a capsule (2a), has its internal space (3a) it is identically sulfur hexafluoride (SF ₆₎ in, for example, is filled at a pressure of 6bar.

The second pressure vessel 8 houses a device and an energization component for one or a plurality of phases of a multiphase alternating system.

In the second pressure vessel 8, a third pressure vessel 18 for accommodating all the equipment necessary for the connection side and the energizing parts of the divided portion is shape-coupled. The third pressure vessel 18 includes a cable separator 19, a cable connection 20 and a high speed grounding switch 21 in the illustrated embodiment. The third pressure vessel 18 is constituted by a capsule 2b, and SF _{6 at a} pressure of 4 bar, for example, is filled in the internal space 3b as a high pressure gas insulator. The inner spaces 3, 3a, and 3b are partitioned so that the gas does not pass through at the joining positions of the pressure vessels 7, 8, and 9.

If necessary, the high pressure gas insulated capsule-coated transformer 22 can be connected to the switchgear shown in FIG. 1 as indicated by the broken line. In this case, the transformer 22 is connected to a predetermined connection. The opening is partitioned so that the gas does not pass through the coupling positions of the first, second and third pressure vessels 7, 8, and 9.

The second pressure vessel 8 is configured in the form of a tube, and the observation line is horizontal so that the vessel supports the first pressure vessel 7 and the third pressure vessel 18.

In the embodiment shown in FIG. 2, the high voltage opening device in the single phase or the multi phase embodiment with respect to the double bus bar is displayed, and the auxiliary bus 31 is first coupled to the second pressure vessel 8 by shape coupling. It is arranged on the intrinsic bus separator 34 in the internal space 33 of the pressure vessel 37 of the.

In Fig. 2, the same parts are denoted by the same reference numerals.

By arranging the second bus system 31, the energizing component 38 is installed in the second pressure vessel 8.

The internal space 33 is partitioned with respect to the adjacent space 3a, and accommodates the electricity supply components 35 and 36.

In the example of FIG. 3, the connection division part which connects two buses 1 and 31 is shown.

In this divided portion, a capsule-coated high-pressure gas insulation transformer is installed in a broken line, but the third pressure vessel 18 is excluded and two types of pressure vessels 7, 37, and 8 are provided. Is installed.

In the drawings, like parts are denoted by like reference numerals. The external shape is therefore also invariable in the required location, but the arrangement of the internal conductors is different. (This can be seen by comparing the conductive wire 17a of FIG. 3 with the conductive wire 17 of FIG. 2)

4 shows an embodiment of a three-phase bus system switchgear partition portion for connecting a overhead line.

In the present embodiment, the second pressure vessel 8 includes busbar disconnectors 4, 34, 44, and conducting parts 5, 6, 35, 36, ( The first pressure vessels 7, 37, and 47 of the bus bar systems 1, 31, and 41 including the 45 and 46 are supported. Accommodate power switch 9 and operate ground switch 10, 11, current transformer 12 and current-carrying parts 13, 14, 15, 16, 17, 38 To the second pressure vessel 8 including, 48, a third pressure vessel 18a having an outdoor lead line 51 is coupled again.

In the third pressure vessel 18a, a switch 19 for the overhead line and a high speed grounding switch 21 are installed.

In addition to the third pressure vessel 18a, the transformer 22 is installed in relation to the line side.

5 is a connection division for a triple bus, similar to the apparatus of FIG. 3 except for the possibility of connecting the transformer 22, two types of pressure vessels 8 and 7/37. Only / (47) is installed.

In FIG. 5, the same parts are denoted by the same reference numerals.

The first pressure vessels 7, 37, 47 can be connected via circuit breakers 52, 53 as circuit elements in divided part units.

6 is a divided part for a double bus system with a bypass bus, and a transformer is installed on the power switch side.

In this figure, the same parts are denoted by the same reference numerals. In all embodiments, all switchgear devices (4), (34), (44) and energizing parts (5), (35), (45) belonging to buses (1), (31), (41), (6), (36) and (46) are mounted in the first pressure vessels (7), (37), and (47).

Power switch (9), operation ground switch (10), (11), current transformer (12), energizing parts (13), (14), (15), (16), (17), (38), (48 In some cases, the disconnecting circuits 52 and 53 as coupling converters are disposed in the second pressure vessel 8 at each divided portion, and all the apparatuses 19 and 21 necessary for the connection side are provided. , 20 and 51 are disposed in the third pressure vessel 18 or 18a. The design change essentially fits the desired basic circuit drawing in the case of only three types of vessels, and is pre-assembled and charged from the front of the tubular second pressure vessel 8. I can do it by a part. Therefore, a mounting opening part closed with a lid is installed on the front surface.

According to the present invention, a switchgear device in which all phases, R, S, and T are arranged in one aero so that three rows run in parallel has a configuration of a known phase difference type. In the case of single-phase capsules of the device used for, is particularly suitable.

As long as the three-phase capsule of the apparatus and the energizing part is installed, the design is simplified.

Claims (1)

Single-phase or multi-phase high voltage switchgear insulated with high-pressure gas coated with metal capsule. The switchgear is provided with a plurality of adjacent pressure vessels separated from each other to accommodate high-pressure switchgear and other live parts. All types of switchgear (4), (34), (44) and energizing parts (5), (35), (45) belonging to one bus bar (1), (31), (41) , (6), (36), (46) are disposed in each of the first pressure vessels (7), (37), (47) for each divided portion, and the parking breaker (9) and the operation ground switch (10). (11), current-carrying components (12), (14), (15), (16), (17), (38), which connect the current transformer (12) and the device to adjacent devices of the same division. (48) are arranged in the second pressure vessel (8) for each divided part, and all the apparatuses (19), (21), (20), (51) and energizing parts necessary for the connection side, for example For example, disconnectors, cable connection terminals, overhead line connection terminals, A gas insulated high voltage switchgear, wherein a ground switch is disposed in each of the third pressure vessels (18) and (18a) for each divided portion.

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