JPH0613541Y2 - Gas insulated switchgear - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial field of application] The present invention relates to a gas-insulated switchgear installed in an electric station such as a substation.

[Prior Art] In an electric station having a double busbar structure, a feeder retracting unit that connects a feeder to two busbars via a circuit breaker,
These are units provided with gas-insulated switchgear that constitute a busbar communication unit that connects between two busbars via a circuit breaker, and a PT unit that connects a voltage transformer for instrument (PT) to each of the two busbars. Are installed in parallel, and the busbars of the installed units are connected to each other to form a gas-insulated switchgear switchgear.

FIG. 4 shows an electrical configuration of each phase of a part of the gas-insulated switchgear having a double busbar configuration. In the same figure, BUS1 and BUS1 are the first and second busbars of the electric station, and U, respectively.
pt is a voltage transformer unit, Ubs is a busbar connection unit.

The voltage transformer unit Upt includes busbar conductors BS11 and BS12 forming a part of the first busbar BUS1 and first and second busbar conductors BS11 and BS12.
Voltage transformers PT1 and PT2, disconnectors DSp1 and DSp2 connecting the first and second voltage transformers PT1 and PT2 to the bus conductors BS11 and BS12, respectively, voltage transformers PT1 and PT2 and disconnectors DSp1 and DSp2. And grounding switches ESW11 and ESW12 for respectively grounding the conductors connecting between the two.

In addition, the busbar connecting unit Ubs is provided with busbars BUS1 and BUS.
Bus conductors BS21 and BS22 respectively constituting a part of 2
, Circuit breaker CB, and disconnectors DSb1 and DS which connect both ends of circuit breaker CB to bus conductors BS21 and BUS22, respectively.
b2 and a ground switch ESW21 that grounds both ends of the circuit breaker CB
And ESW22 and current transformers CT1 and CT2 mounted on conductors connected to both ends of the circuit breaker CB.

The voltage transformer unit Upt and the busbar connecting unit Ubs are arranged side by side with other units such as a feeder pull-in unit, and the busbar conductors BS11 and BS of the units arranged in parallel.
, ... and BS21, BS22, ... Are connected to each other to form busbars BUS1 and BUS2 of the electric station.

FIG. 2 shows the configuration of the voltage transformer unit Upt previously proposed by the present applicant in Japanese Patent Application No. 60-129505. In this example, the busbar container 1 for the first and second transformer units is shown. 1 and 2 respectively accommodate the first and second transformer unit busbar conductors BS11 and BS12 and the disconnectors DSp1 and DSp2 to form the first and second transformer unit busbar elements Eb11 and Eb12. There is. First
The first and second transformer containers 5 and 6 are connected to the lower ends of the busbar elements for the transformer unit and the second transformer unit via relay containers 3 and 4 for the transformer unit, respectively. First and second voltage transformer elements PT1 and PT2 are respectively housed in the container to form first and second voltage transformer elements Ep1 and Ep2. In the relay containers 3 and 4, connection conductors 5 and 6 for connecting the voltage transformers PT1 and PT2 to the disconnecting switches DSb1 and DSb2, and earthing switches ESW11 and ESW12 for grounding these conductors are housed. First and second ground switch elements Ee11 and Ee12 are constructed.

FIG. 3 shows the configuration of the proposed busbar connecting unit Ubs. In this example, the busbars for the first and second connecting units are provided in the busbar containers 7 and 8 for the first and second connecting units, respectively. Conductors BS21 and BS22 and disconnectors DSb1 and D
Sb2 is accommodated to form first and second connecting unit busbar elements Eb21 and Eb22, which are supported on the pedestal 9 and connected to the lower ends of the first and second connecting unit busbar elements. In the container 10 a busbar breaker CB, grounding switches ESW21 and ESW22 and a current transformer CT
1 and CT2 are housed to form a circuit breaker element Ecb.

[Problems to be solved by the invention] In the conventional gas-insulated switchgear, there is no structural commonality between the voltage transformer unit Upt and the busbar communication unit Ubs except for the busbar element. Since each container had a completely different structure, it was necessary to prepare a different container for each unit. In addition, if the container is different, it is necessary to change the shape, size, support structure, etc. of the conductor to be placed inside it, so standardization of the container and conductor cannot be achieved, and it takes time to manufacture and the delivery time becomes long. On top of that, there is a problem that the cost becomes high.

An object of the present invention is to provide a gas-insulated switchgear that can standardize the container, facilitate manufacturing, and reduce the cost.

[Means for Solving the Problems] In the present invention, the first and second transformer unit busbar conductors are housed in the same-configured first and second transformer unit busbar containers. First and second transformer unit busbar elements, and first and second transformer unit busbar elements connected to the lower ends thereof via first and second transformer unit relay containers, respectively. A voltage transformer unit having first and second voltage transformer elements respectively accommodating first and second voltage transformer vessels in first and second transformer containers, respectively 1
And first and second connecting unit busbar elements in which first and second connecting unit busbar conductors are housed in a second connecting unit busbar container, and first and second connecting unit busbars A gas-insulated switchgear equipped with a busbar communication unit having a circuit breaker element in which a busbar communication circuit breaker is housed in a circuit breaker container connected to the lower end of the element, and first and second transformer units. The busbar container for the first and second connecting units is configured the same as the busbar container for the first and second connecting units, and first and second pipe stubs are provided above the breaker container of the busbar connecting unit to provide the first and second pipes. The stand was connected to the lower ends of the busbar elements for the first and second communication units via the relay containers for the first and second communication units, respectively. The relay containers for the first and second communication units are configured the same as the relay containers for the first and second transformer units, respectively, and the relay containers having the same structure are used for the busbar communication unit and the voltage transformer unit. I got it.

In the present invention, there is no obstacle to further provision of other units such as a feeder lead-in unit for connecting the feeder to the busbar through the breaker and a transformer connecting unit for connecting the transformer to the busbar through the breaker. .

[Advantage of the Invention] With the above-described configuration, the voltage transformer unit and the busbar communication unit can have the same structure for the busbar container and the relay container, respectively, and thus standardization of these containers can be achieved. It is possible to mass-produce and reduce the cost.

[Embodiment] An embodiment of the present invention will be described below with reference to the accompanying drawings.

According to the present invention, in constructing a gas-insulated switchgear having a voltage transformer unit Upt and a busbar connecting unit Ubs as shown in FIG. 4, the voltage transformer unit Upt has been proposed in FIG. The unit has the same structure as that of the above unit, and the busbar connecting unit Ubs has the structure shown in FIG.

The voltage transformer unit Upt shown in FIG. 2 will now be described in more detail. The first and second transformer unit busbar containers 1 and 2 respectively include horizontal busbar storage conduits 1a and 2a. Branch line 1b orthogonal to these lines
And 2b, each of which is formed in a cross-like tube shape, and has flanges provided at both ends of the bus bar storage pipeline and the branch pipeline so that another container, an insulating spacer or the like can be connected thereto.

Bus lines BUS1 are provided in the bus line storage lines 1a and 2a, respectively.
, And three-phase busbar conductors BS11 and BS12 that form a part of BUS2 are housed, and these busbar conductors are normally supported by insulating spacers attached to both ends of the busbar housing pipelines 1a and 1b. The disconnectors DSp1 and DSp2 are housed in the space near the intersection of the bus bar storage pipeline and the branch pipeline, and the operating shafts 20 and 21 of these disconnectors are the branch pipelines 1b and 2
It is led out from the upper end side surface of b. These operation shafts 20 and 21 are supported on the side surface of the transformer container 5 via a connecting mechanism 22 including a lever, a link and the like.
Connected to 3. The upper ends of the branch pipelines 1b and 2b are closed by a lid 23, and the lower ends thereof are insulating spacers 24 and 25.
Is connected to the upper ends of the first and second transformer unit relay containers 3 and 4.

The relay containers 3 and 4 for the first and second transformer units are
It consists of a cylindrical container with the axis oriented vertically,
A flange is provided at each end, and a short branch pipe portion 3 is formed on each side surface of the bus bars BUS1 and BUS2 in a direction perpendicular to the longitudinal direction (direction perpendicular to the plane of the drawing).
a and 4a, and the grounding device containers 26 and 27 are connected to the branch pipe portions 3a and 4a, respectively. These relay containers 3 and 4 have the same structure and the same size, and are arranged with their respective branch pipe portions 3a and 4a oriented in opposite directions, and the flanges at the lower ends of the relay containers 4 and 5 are insulated spacers 28. And 29 to the flanges at the upper ends of the first and second nozzles 5a and 6a provided at the upper ends of the transformer containers 5 and 6, respectively.

The transformer containers 5 and 6 are supported on a pedestal 30, and the voltage transformers PT1 and PT2 are housed in these containers, respectively.

The conductors 31 and 32 extending in the vertical direction are housed in the relay containers 4 and 5, respectively, and the upper ends of these conductors 31 and 32 pass through the penetrating conductors of the insulating spacers 24 and 25 and the disconnecting switches DSp1 and DSp1 in the busbar containers 1 and 2, respectively. DSp2 and its lower end are connected to voltage transformers PT1 and PT2 through through conductors of insulating spacers 28 and 29.

Grounding switches ESW11 and ESW12 are housed in the grounding device containers 26 and 27, and the conductors 31 and 32 are grounded by these grounding switches. Grounding device operating devices 33 and 34 are supported on the side surfaces of the grounding device containers 26 and 27, and the operating parts of the grounding switches ESW11 and ESW12 are connected to these operating devices via links.

Next, the busbar connecting unit Ubs will be described with reference to FIG. First and second connecting unit busbar containers 7 and 8
Is configured in the same manner as the first and second transformer unit busbar containers 1 and 2 shown in FIG.
Are respectively composed of bus line storage pipelines 7a and 8a and branch pipelines 7b and 8b orthogonal to these pipelines. First and second connecting unit busbar conductors BS21 and BS22 are housed in the busbar housing pipes 7a and 8a, respectively, and a space near the intersection of the busbar housing pipes 7a and 8a and the branch pipes 7b and 8b. The disconnecting switches DSb1 and DSb2 are housed in the first and second connecting unit busbar elements Eb2.
1 and Eb22 are configured.

The lower ends of the branch pipelines 7b and 8b of the first and second connecting unit busbar containers 7 and 8 are respectively connected to the upper ends of the first and second connecting unit relay containers 43 and 44 through insulating spacers 41 and 42, respectively. Connected, these relay containers 43
A circuit breaker container 47 is connected to the lower ends of and 44 via insulating spacers 45 and 46.

The relay containers 43 and 44 for the first and second communication units have the same configuration as the relay containers 3 and 4 for the first and second transformer units, and the side walls of these relay containers 43 and 44 are branched. Pipe parts 43a and 44a are provided, and grounding device containers 48 and 49 are connected to the branch pipe parts 47, respectively.

The circuit breaker container 47 is composed of a cylindrical container and is supported on the support base 50 with its axis oriented in a direction perpendicular to the longitudinal directions of the bus lines BUS1 and BUS2. The breaker container 47 has first and second nozzles 47a and 47b on its upper portion, and the flanges of the first and second nozzles are connected to the relay container 4 via insulating spacers 45 and 46, respectively.
It is connected to the lower flanges of 3 and 44.

A circuit breaker CB is housed in the circuit breaker container 47, and the circuit breaker CB is attached to the cover plate 5 so as to close one end of the container 47.
Supported by 1. A mechanism box 52 accommodating the operation mechanism of the circuit breaker is attached to the outside of the cover plate 51.
The operating shaft 53 derived from 2 is connected to the circuit breaker operating device 54 via an appropriate connecting mechanism 55. Operating device 5
4 is supported by a support plate 56 fixed to the circuit breaker container 47 by appropriate means. One ends of the connection conductors 57 and 58 are connected to one end and the other end of the circuit breaker CB, respectively, and the other ends of these connection conductors 57 and 58 are connected to the through conductors of the insulating spacers 45 and 46, respectively.
Current transformers CT1 and C are connected to the connection conductors 57 and 58, respectively.
T2 is installed.

The conductors 60 and 61 extending in the vertical direction are housed in the relay containers 43 and 44, respectively, and the upper ends of these conductors pass through the penetrating conductors of the insulating spacers 41 and 42 to form the busbar container 7.
, 8 and 8 and the lower ends thereof are connected to the connecting conductors 57 and 58 connected to one end and the other end of the circuit breaker CB through the penetrating conductors of the insulating spacers 45 and 46.

Grounding switches ESW21 and ESW22 are housed in grounding device containers 48 and 49 connected to the branch pipe portions 43a and 44a of the relay containers 43 and 44, respectively, and the conductors 60 and 61 are grounded by these grounding switches. It is like this. The grounding device operating devices 62 and 63 are supported on the side surfaces of the grounding device containers 48 and 49, respectively.
The operating portion of the ESW 22 is connected to these operating devices via links.

Further, a disconnecting switch operating device 65 is attached to the other end of the circuit breaker container 47, and operating shafts 66 and 67 of the disconnecting switches DSb1 and DSb2 led out from the upper parts of the busbar containers 7 and 8 are a connecting mechanism 68 including a lever or a link. It is connected to the operating device 65 via.

In this example, the circuit breaker container 47 and the relay containers 43 and 44
The circuit breaker element Ecb is constituted by the device housed inside these containers.

The busbar communication unit Ubs and the voltage transformer unit Upt
Are arranged side by side with other units along the busbars BUS1 and BUS2, and the busbar storage conduits of adjacent busbar elements are connected via an insulating spacer to form a busbar BU.
S1 and BUS2 are configured. Voltage transformer unit U
When pt and the busbar connecting unit Ubs are arranged adjacent to each other, the adjacent ends of the busbar storage conduits of the busbar elements Eb11 and Eb21 are connected via an insulating spacer, and the busbar element is provided via the insulating spacer. The busbar conductors of Eb11 and Eb21 are connected to each other to form a busbar BUS1.
Further, adjacent ends of the bus bar accommodating pipelines of the bus bar elements Eb12 and Eb22 are connected through an insulating spacer, and the bus bar conductors in the bus bar elements Eb21 and Eb22 are connected through the insulating spacer to form a bus bar BUS2. .

[Advantages of the Invention] As described above, according to the present invention, the circuit breaker container of the busbar communication unit is connected to the busbar container via the relay container, and the relay container of the busbar communication unit is connected to the voltage transformer unit. Since it has the same structure as that of the relay container, most of the constituent elements of the container of both units can be standardized with the same structure, and there is an advantage that the container can be mass-produced and the cost can be reduced. . Moreover, since common parts can be used for each unit, there is an advantage that the quality of parts can be stabilized.

[Brief description of drawings]

1 and 2 are configuration diagrams showing the configurations of a busbar communication unit and a voltage transformer unit used in the present invention, and FIG. 3 is a configuration diagram showing the structure of a busbar communication unit already proposed,
FIG. 4 is a single wire connection diagram showing the electrical configuration of the essential parts of the gas-insulated switchgear that is the subject of the present invention. 1 ... 1st transformer unit busbar container, 2 ... 2nd transformer unit busbar container, 3 ... 1st transformer unit relay container, 4 ... 2nd transformer unit relay container Container, 5, 6 ... voltage transformer container, 7, 8 ... first connecting unit busbar container, 8 ... second connecting unit busbar container, 43 ... first connecting unit relay container, 44 ...
… Second relay unit relay container, 47 …… Circuit breaker container, Eb11 …… First transformer unit busbar element, Eb12 …… Second transformer unit busbar element, Eb21 …… First contact Busbar element for unit,
Eb22 ... Bus element for second communication unit, Ecb
...... Circuit breaker element, Ep1 ...... First voltage transformer element, Ep2 ...... Second voltage transformer element.

Claims (1)

[Scope of utility model registration request] 1. A first and second transformer unit in which first and second transformer unit busbar conductors are housed in the same first and second transformer unit busbar containers. Busbar elements and first and second transformer container containers connected to the lower ends of the busbar elements for the first and second transformer units via relay containers for the first and second transformer units, respectively. A voltage transformer unit having first and second voltage transformer elements respectively accommodating first and second voltage transformers, and busbars for the first and second connecting units having the same configuration A busbar element for the first and second communication units, in which a busbar conductor for the first and second communication units is housed in a container, and a lower end of the busbar elements for the first and second communication units. Bus bar connection in the circuit breaker container In a gas-insulated switchgear equipped with a busbar communication unit having a circuit breaker element that houses a circuit breaker, a busbar container for the first and second transformer units is provided with the first and second communication lines. The busbar container of the unit has the same structure as that of the unit busbar container, and the circuit breaker container of the busbar communication unit has first and second nozzles at the upper part thereof, and the first and second nozzles are respectively the first nozzles.
And the second connecting unit relay container is connected to the lower ends of the first and second connecting unit busbar elements, and the first and second connecting unit relay containers are respectively the first and second A gas-insulated switchgear having the same structure as the relay container for the transformer unit of.