JPH06197424A - Gas-insulated switchgear - Google Patents

Abstract

PURPOSE:To reduce an installation space for a gas-insulated switchgear by arranging a current transformer constituting a bus-bar section circuit in three dimensions against the axis of a main bus-bar and making the positions of the main bus-bar and a circuit- breaker to approach, and arranging the circuit-breaker of the bus-bar section circuit and a circuit-breaker of another circuit on the straight. CONSTITUTION:Concerning to a gas-insulated switchgear constituting a bus-bar section circuit, sectional main bus-bars 33 and 43 connected to main bus-bars are arranged on the sides of these main bus bars 4 arranged in parallel to its installed plane. The sectional main bus-bar 33 is connected to a circuit-breaker 20 arranged putting the axis of the main bus-bar 4 between, and a current transformer 32 is arranged at the connecting part of the axis of this main bus-bar 4. As a result of this, the main bus-bar 4 and the current transformer are arranged in three dimensions. The lead wire part of the lower part of the circuit-breaker 20 is connected to the main bus-bars through the medium of a grounding switch 23 and a disconnector 24 other than a potential current transformer 32, and the current flowing connecting part at the upper part is connected to the sectional main bus-bars 33 through the working grounding switch 23 and the disconnector 24.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a gas insulated switchgear having a bus section line.

[0002]

2. Description of the Related Art At substations or switchyards installed around large cities or in coastal areas, electrical equipment that composes substations or switchyards should be equipped with SF6 gas because of the difficulty of land acquisition and salt damage prevention measures. A small and highly reliable gas-insulated switchgear sealed with such an insulating gas is used.

This type of gas-insulated switchgear has been further increased in voltage and capacity with the increase in electric power demand in urban areas. Further miniaturization, improvement in reliability, and simplification of maintenance. Is required. Therefore, the circuit breakers, disconnectors, and other required equipment that make up the gas-insulated switchgear are arranged three-dimensionally, the distance between the equipment is narrowed, and the site area is greatly reduced.

In a substation or the like using such a gas-insulated switchgear, a busbar division line for separating one main busbar is provided for an emergency such as an accident or system correspondence. FIG. 5 shows a single-line connection diagram of a substation of the double-bus system having such a bus section line. That is, the main buses 3, 3a,
4, 4a are connected to the main busses 3, 3a, 4, 4a, and busbar ground switches 5, 5a, 6, 6a, busbar voltage transformers 7, 7a, 8, 8a, and a plurality of lines. A power line 9 and a transformer line 10 are connected as shown in FIG.

A gas-insulated switchgear based on such a single-wire connection diagram generally has main buses 3 and 4 forming a double-bus.
And 3a and 4a are arranged vertically and parallel to the installation surface, and each main busbar 3 and 4 and 3a and 4a are arranged in a straight line. Then, a plurality of one line formed by arranging components of one circuit are arranged on one plane or two planes orthogonal to the main bus. That is, two sets of main busbars 3 and 3 arranged in parallel and straight to the installation surface
a and 4, 4a are connected to each other by bus line dividing lines 1 and 2 in which components of a bus line dividing circuit are arranged on two planes orthogonal to the axes of the main bus lines 3, 3a, 4, 4a. . Further, to the main bus lines 3, 3a, 4, 4a, a line circuit 9 for forming a line circuit and a transformer line 10 for forming a transformer circuit are connected in parallel with the bus section lines 1, 2. . In addition, the grounding switches for busbars 5, 5a, 6,
6a and an instrument transformer for busbars 7, 7a, 8, 8a, an instrument transformer line for busbars 11 includes the main busbars 3, 3a,
4 and 4a, respectively. Furthermore, the main bus 3,
There is also provided a busbar communication line 12 for connecting 3a to each other and main busbars 4 and 4a to each other.

Here, the specific arrangement of the equipment of the line circuit 9, the bus line section lines 1 and 2, and the bus instrument transformer line 11 will be described with reference to FIGS. 6 to 9. First, the line circuit 9 will be described. That is, as shown in FIGS. 6 and 7, the circuit breaker 20 in which the circuit breaker 21 and the current transformer 22 for an instrument are housed in the container is installed in the main bus 3 so that the container axis is perpendicular to the installation surface. , 4 are arranged laterally. Further, on the side surface of the container facing the main busbars 3 and 4, three current-carrying connection parts are provided up and down along the container axis, and the two current-carrying connection parts at the lower part thereof are grounding switches for work. It is connected to the main buses 3 and 4 via 23 and a disconnector 24.
On the other hand, a work grounding switch 23, a line disconnecting switch 24a, and a line grounding switch 25a are horizontally connected to the upper energization connection part and connected to the cable connection part 27. The cable connecting portion 27 further includes a lightning arrester 28,
An instrument transformer 29 is connected. A control panel 30 is arranged below the instrument transformer 29.

Next, the busbar section lines 1 and 2 will be described. That is, as shown in FIG. 8, the busbar section lines 1 and 2 are provided with a disconnector 24, a grounding switch 23, and a current transformer 26 in the orthogonal direction from the main busbar 4, which are located on the main busbar 4 side. It is connected to the lower outlet of the vertical circuit breaker 20 provided on one side. A connecting busbar 13 for crossing, which is orthogonal to the main busbar, is drawn out from the upper outlet of the circuit breaker 20, and a vertical connecting busbar 14 is provided in the opposite direction to the circuit breaker 20 via a grounding switch 23 and a disconnector 24. Attached to the top of.
A connecting busbar 15 extending in the same plane as and parallel to the main busbar 4 is connected to a lower portion of the vertical connecting busbar 14, and a tip of the connecting busbar 15 is connected to a tip of a main busbar 4a of another section. In the conventional device having such a configuration, the circuit breaker 20 is located at a position distant from the main bus by the amount of the current transformer 26 as compared with the circuit breakers of other lines (for example, the line line 9 in FIG. 7). It will be placed on the left side.

Further, in the conventional apparatus, the bus transformer instrument transformer line 11 is independent of other lines, for example, a bus bar segmenting line and a bus line connecting line, and each end of the main bus lines 3 and 4 is independent of the other lines. The busbar grounding switches 5 and 6 are connected to the busbars, and the busbar instrument transformers 7 and 8 are connected in the horizontal direction through current-carrying connection portions provided on the side surfaces of the containers.

[0009]

However, in the conventional gas-insulated switchgear as described above, as shown in FIGS. 6 to 9, the constituent devices of each line are different, and therefore, the instrument is provided on both sides of the circuit breaker. In the busbar section lines 1 and 2 that require a current transformer, the position of the circuit breaker 20 is the same as the position of the circuit breaker of the other line because of the instrument current transformer 26 provided between the busbar section lines 1 and 2. Not on a straight line. In other words, in the past, the busbar was drawn out horizontally at the same height as the main busbar, and the current transformer was installed in that part before connecting to the circuit breaker.Therefore, there is a current transformer section between the circuit breaker and the main busbar. The interval was absolutely necessary. Therefore, the circuit breaker 20 has a structure in which only the busbar section lines 1 and 2 are projected outward, resulting in a wasteful space for the gas-insulated switchgear, resulting in a large installation space as a whole. Further, in the past, since the bus transformer instrument transformer line 11 was branched from the main bus lines 3 and 3 and provided in parallel with and independently of the other lines, a dedicated space for that is also required, and gas insulation is required. It was a factor that hindered the downsizing of the switchgear.

The present invention has been proposed in order to solve the above-mentioned drawbacks of the prior art, and its purpose is to arrange the main busbar and the current transformer in a three-dimensional manner to provide a structural space. It is intended to provide a gas-insulated switchgear capable of effectively reducing the installation space by effectively utilizing.

[0011]

DISCLOSURE OF THE INVENTION The present invention is constituted by a device in which a current-carrying part is housed in a grounded metal container filled with an insulating gas, and is provided with a compound busbar consisting of two main busbars. In a gas-insulated switchgear equipped with a bus-bar sectioning line that divides into first and second sections, two main bus-bars that compose the double-buses of each section are arranged parallel to the installation surface and above and below the bus-bar section. Connect the transformer transformer circuit for the busbar adjacent to the line, and in the busbar section line, place the main bus line for division having an axis parallel to each main bus line and passing the side of each main bus line. The main bus for division is connected to the main bus of each system in the transformer transformer circuit portion for the bus, and the main bus for division is arranged on the other side of the main bus bar on the opposite side across the axis of the main bus. Of the main bus in this main bus for division Characterized in that a current transformer which constitutes the busbar section line in cross section of the line.

[0012]

In the gas-insulated switchgear according to the present invention, the main busbars are not arranged in a straight line, and the main busbars are provided in parallel to the axis of the main busbars in the busbar division line and the bus transformer circuit for instrumentation. It is possible to arrange the current transformer of the busbar section line three-dimensionally with respect to the axis of the main busbar by utilizing the transition portion connecting the main busbar and the circuit breaker. as a result,
It is possible to eliminate the wasted space that has been generated in the conventional busbar section line, and it is possible to make the distance between the circuit breaker and the main busbar closer, and the circuit breaker for the busbar section circuit is arranged in a straight line with the circuit breakers for other circuits. can do. In addition, since the busbar instrument transformer line, which is conventionally provided independently, can be used as a connection space for the main bus for sorting, the installation space of the entire device can be significantly reduced.

[0013]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be specifically described below with reference to FIGS. The same members as those of the conventional type shown in FIGS. 5 to 9 are designated by the same reference numerals, and the description thereof will be omitted.

(1) Configuration of the Embodiment FIG. 3 is a plan view of a bus line portion of the present embodiment, in which the upper portions of the main bus lines 3 and 4 of the first section are arranged in parallel vertically. The second, which is also vertically arranged in the extension direction and the lower part
This is the extension direction of the main buses 3a and 4a of the section. These main buses 3 and 3a are extended on the same straight line and arranged at the same height from the installation surface (the position of the main bus 33 in FIG. 1, hereinafter referred to as the middle stage). The main buses 4, 4a are
Below the main buses 3 and 3a (the position of the main bus 4 in FIG. 1, hereinafter,
It is located at the bottom).

First, the arrangement path of the main bus 3 will be described. The main bus 3 extending from the upper part of FIG.
It reaches the bus transformer line 11 and branches into a T-shape,
One end thereof is connected to the busbar grounding switch 5 and the busbar instrument transformer 7. In this case, the connection state between the branch portion of the main bus, the bus grounding switch 5 and the bus instrument transformer 7 is:
This is as shown in FIG. On the other hand, on the opposite side of the T-shaped branch portion, the height is in the middle and extends at a right angle to the extension direction of the main bus bar 3 and is provided at the same height as the main bus bar 3 and at a distance from the main bus bar 3 in parallel. It is connected to the main bus 33.

This partitioning main busbar 33 reaches the portion of the busbar partitioning line 1 in the middle stage, and then bends in the direction perpendicular to the main busbar 3 so that the vertical circuit breaker 30 provided on the side of the main busbar 3 is provided. It is connected to the lead-out section in the middle stage. In this case, the partition main bus 33
As shown in FIG. 1, a grounding switch 23 and an instrument current transformer 32 are disposed between the switch and the circuit breaker 20. In addition,
In the plan view of FIG. 3, these members are hidden below. The partition main bus 33 drawn out from the upper lead-out portion of the circuit breaker 20 returns to the original direction (the direction opposite to the circuit breaker) in a direction orthogonal to the main bus 3 at its height (hereinafter referred to as the upper stage),
It bends in an L shape at the position of the first partitioning main bus 33 and goes toward the second partition line side (downward in the figure).

The partitioning main bus 33 arranged in the upper stage reaches the vertical connection bus 19 and is pulled down to the position of the middle stage by this, and then further extended downward in the drawing to reach the busbar section line 2 portion. In the busbar section line 2, the partitioning main busbar 33 is bent in an L shape toward the breaker 20 side (hidden in the figure because it is below other devices), and the main busbars 3, 4 is bent downward in the figure at a position where the extension has been reached, and is connected to the main bus 3a arranged in the middle stage at the busbar instrument transformer line 2 portion (after bending, it appears in FIG. 1). Further, a T-shaped branch portion is provided at the busbar instrument transformer line 2 part in the main bus 33 for division, and the busbar grounding switch 5a and the busbar instrument transformer 7a are connected to this branch portion. To be done.

Next, the connection state of the main buses 4 and 4a will be described. In the first section, the main bus bar 4 is arranged in parallel with the main bus bar 3 and at a height below it (lower stage). The main bus bar 4 is provided with a T-shaped branch portion in the transformer transformer line 1 portion for the bus bar, and the tip of the branch portion extending at right angles to the main bus bar 4 has a bus bar as shown in FIGS. 2 and 3. It is connected to the grounding switch 8 and the transformer 6 for the busbar instrument. The lower end of the main bus bar 4 in the drawing is bent at a right angle toward the side opposite to the circuit breaker 20 provided therein while reaching the bus line section line 1 portion, and is connected to the section main bus line 43. To be done.

As shown in FIG. 2, the partition main bus 43 extends to a position directly below the partition main bus 33, and is bent downward in the drawing in parallel with the partition main bus 33 and at the lower position. And reaches the bus section section line 2. The dividing line 43 extending in the lower stage is bent in a direction perpendicular to the main bus bar 4, and is connected to the lower outlet of the circuit breaker 20 provided at the end of the bus bar dividing line 2. In this case, as in the case of the partitioning main bus 33, the grounding switch 23 and the current transformer 3 are provided between the partitioning main bus 43 and the lower outlet of the breaker 20.
2 is provided, but is hidden in FIG. In addition, since the heights of the sorting main buses 43 up to now are all lower, the main buses 3 arranged only in the middle or upper portion are
Also, there is no interference with the partitioning main bus 33.

The partition main bus 43 drawn out from the upper lead-out portion of the circuit breaker returns to the original parallel arrangement position in the opposite direction, but the height at this time is at the upper stage. Therefore, it does not interfere with the partitioning main bus 33 arranged in the middle stage. A grounding switch 23 and a disconnector 24 are provided on the way back to the opposite direction.

The partitioning main bus 43, which has returned to the position parallel to the main bus 4, is bent again in parallel with the main bus 4 and reaches the portion of the bus transformer 11 for the measuring instrument for the bus. It is pulled down to the bottom. In the lower part of the vertical connection bus bar 18, the dividing line 43 is branched into a T shape, and the bus bar earthing switch 6a and the bus bar instrument transformer 8a are connected to the end portion on the side opposite to the circuit breaker. .
On the other hand, the tip on the opposite side of the branch portion is extended toward the circuit breaker 20 side (the left side in the figure), and is bent into an L-shape at a position just below the main bus bar 3a, and the main bus bar 4 is bent.
connected to a.

(2) Operation and effect of the embodiment In the gas-insulated switchgear of this embodiment having such a structure, the main busbars 3 and 3a and 4 and 4a of the two sections arranged horizontally on the installation surface are , Busbars 33, 4 for classification, respectively
Connected by three. In that case, the dividing bus bar 3
Reference numerals 3 and 43 have portions arranged in parallel to the axes of the main buses 3, 3a, 4 and 4a, and also have crossover portions that are connected to the circuit breaker on the opposite side beyond the axis of the main buses. ing. As a result, by providing a current transformer in this crossover portion, it becomes possible to arrange the axis line of the main busbar and the current transformer in a three-dimensional manner, and the circuit breaker 20 is connected to the main busbar as compared with the conventional type shown in FIG. Can be placed in close proximity to. As a result, the circuit breaker 20 for the busbar section line can be arranged in line with the circuit breakers for the other lines, which enables downsizing of the entire device, effective use of the site, and easy maintenance.

Further, the busbar grounding switches 5 and 6 and the busbar instrument transformers 7 and 8 constituting the busbar instrument transformer circuit.
Is installed in the connecting space between the main bus and the main bus for division in the bus section line, there is no need to install a separate transformer line for measuring instruments for the bus line, which was conventionally configured as one line.

[0024]

As described above, according to the present invention, the bus instrument transformer line is connected adjacent to the bus section line,
The installation space can be reduced by converting the arrangement of the main bus of the double bus system in these lines and by arranging the current transformers forming the bus section lines three-dimensionally with respect to the axis of the main bus. It is possible to provide a gas-insulated switchgear that is enabled.

[Brief description of drawings]

FIG. 1 is a side view showing a bus section line in an embodiment of a gas insulated switchgear of the present invention.

FIG. 2 is a side view showing a transformer circuit for an instrument for a bus in the embodiment of FIG.

3 is a plan view showing a bus section line and a bus instrument transformer line section in the embodiment of FIG. 1. FIG.

FIG. 4 is a plan view showing an arrangement configuration of a gas-insulated switchgear according to the present invention.

FIG. 5 is a single wire connection diagram of a general gas insulated switchgear.

FIG. 6 is a plan view showing the configuration of a line for a conventional gas-insulated switchgear.

FIG. 7 is a side view of FIG.

FIG. 8 is a side view showing a bus section line in a conventional gas insulated switchgear.

FIG. 9 is a side view showing a transformer circuit section for a busbar instrument in a conventional gas-insulated switchgear.

[Explanation of symbols]

 1, 2 ... Bus line section line 3, 3a, 4, 4a ... Main bus line 5, 5a, 6, 6a ... Busbar grounding switch 7, 7a, 8, 8a ... Busbar instrument transformer 9 ... Line line 10 ... Transformer line 11 ... Bus line instrument transformer line 20 ... Circuit breaker 21 ... Breaker section 22 ... Instrument current transformer 23 ... Grounding switch 24 ... Bus line side disconnector 24a ... Line disconnector 25a ... Line grounding Switch 26 ... Current transformer 27 ... Cable connection part 28 ... Lightning arrester 29 ... Instrument transformer for line 30 ... Control panel 32 ... Current transformer 33, 43 ... Main bus bar for division

Claims (1)

[Claims] 1. A grounded metal container filled with an insulating gas, which comprises a device having a current-carrying part housed therein, and is provided with a compound busbar consisting of two main busbars. These main busbars are divided into first and second sections. In a gas-insulated switchgear having a busbar sectioning line to be divided, two main busbars forming a double busbar for each section are arranged in parallel with and vertically above an installation surface, and a busbar instrument is adjacent to the busbar sectioning line. Connecting the transformer transformer line, and in the busbar section line, arrange the sectioning main busbars that have an axis line that is parallel to each main busbar and runs laterally of each main busbar,
This main bus for division is connected to the main bus of two systems in the transformer circuit part for the instrument for the bus, and each main bus for division is arranged on the opposite side across the axis of the main bus of the two systems on the route. A gas-insulated switchgear which is connected to the circuit breaker, and a current transformer which constitutes a bus section line is arranged at the crossing portion of the axis of each of the main buses in the section main bus.