WO2013021678A1

WO2013021678A1 - Gas-insulated switchgear

Info

Publication number: WO2013021678A1
Application number: PCT/JP2012/059183
Authority: WO
Inventors: 慎太郎黒明; 英二森藤; 孝年大坪; 由起勇東川
Original assignee: 三菱電機株式会社
Priority date: 2011-08-05
Filing date: 2012-04-04
Publication date: 2013-02-14
Also published as: CN103703639B; CN103703639A; JP5484638B2; JPWO2013021678A1

Abstract

The present invention reduces an area for installing a gas-insulated switchgear used as a power receiving equipment. This gas-insulated switchgear is constructed by installing multiple panels (1) side by side in line, each of said panels having the functions of an incoming panel (R), a transformer panel (F), and a VCT (V). The switchgear is provided with horizontal three-phase bus bars (12-15), which are used to connect the panels (1) together, for a maximum of four circuits. The space for installing the four circuits' worth of horizontal three-phase bus bars (12-15) is divided into two rows in the front-back direction and two stages in the vertical direction in the upper or the lower section of a case for the panels (1) in order to accommodate the maximum of four circuits, and the horizontal three-phase bus bars (12-15) for connecting the panels (1) together are arranged such that conductors of the respective phases are positioned horizontally in the front-back direction of the panels (1) at predetermined intervals. The horizontal three-phase bus bars (12-15) are provided with bushings (18-21) on both ends and arranged to run through the installation space, said bushings penetrating through a bus bar connection tank (8) from above or below the bus bar connection tank (8).

Description

Gas insulated switchgear

This invention relates to a gas-insulated switchgear used on the power receiving side of a substation, and relates to the arrangement and connection configuration of a power receiving unit on the drawing side, a transformer unit on the load side, and an MOF that measures the received power.

Fig. 22 to Fig. 25 show gas insulation switchgears for power reception, which are 72 / 84kV class, as conventional examples. In the figure, (a) is a single-line connection diagram of the power receiving circuit, (b) is a single-line connection diagram showing the casing of the gas-insulated switchgear and the devices housed therein and their connections, and (c) is the gas The row | line | column structure of an insulated switchgear is each shown. In this conventional example, the power receiving unit (A) 2 side, the transformer unit (B) 2 side, and the MOF unit are configured in 5 planes, and a horizontal bus bus tank is arranged at the bottom of the panel. Fig. 23 shows the power supply to the transformer of 2 banks via the VCT by the line power reception. Fig. 23 shows the power supply to the transformer of the 2 banks via the VCT with a bypass circuit. The power is supplied to the transformer in two banks via one of two VCTs connected in parallel. FIG. 25 is a side sectional view of a gas insulated switchgear applied to the above configuration.

Japanese Patent Laid-Open No. 11-127510 (pages 2 to 3, FIGS. 1 to 4)

The gas-insulated switchgear shown in Patent Document 1 receives power through two lines and supplies power to a transformer in two banks via the MOF. In the case shown in FIG. 22, the device is provided on both sides of the VCT arranged in the center. There is a problem that a space for raising the busbars for arranging the busbars connecting the upper and lower sides of the switchboards is necessary, and the installation area of the switchgears arranged in a row is increased. Further, in the configuration shown in FIG. 23, the bypass unit P is necessary in addition to the configuration of FIG. 24 requires auxiliary units Q to S in addition to the configuration of FIG. 23, and there is a problem that the installation area of the switchgear arranged in a row is further increased.
An object of the present invention is to obtain a gas-insulated switchgear in which the number of cases constituting a row board is reduced to reduce the installation area.

The gas insulated switchgear according to the present invention is a power-receiving gas insulated switchgear constituted by arranging a plurality of panels. In the gas insulated switchgear for receiving power, four horizontal lines are arranged for connecting the panels, and the horizontal lines connecting the panels are connected. The bus is arranged so as to pass through the arrangement space.

According to the gas-insulated switchgear of the present invention, the arrangement space of the horizontal bus lines connecting the respective panels is provided for four lines, and the horizontal bus lines connecting the panels are routed through the arrangement space. It is possible to provide a gas insulated switchgear that can be configured compactly only with a predetermined standardized board in various arrangement patterns.

It is a sectional side view of the gas insulated switchgear of Embodiment 1 of this invention. It is the reverse view seen from the right side of FIG. It is a sectional side view of the gas insulated switchgear of Embodiment 2 of this invention. FIG. 4 is a rear view of FIG. 3. FIG. 5 is a single-line diagram of a common standby 2-line VCT bypass 2-bank configuration. FIG. 6 is a connection diagram of an arrangement pattern 1 of a casing and device arrangement in the single-line connection diagram of FIG. 5. FIG. 6 is a connection diagram of an arrangement pattern 2 of housings and device arrangement in the single-line connection diagram of FIG. 5. FIG. 6 is a connection diagram of an arrangement pattern 3 of housing and device arrangement in the single-line connection diagram of FIG. 5. FIG. 6 is a connection diagram of an arrangement pattern 4 of housings and device arrangement in the single-line connection diagram of FIG. 5. FIG. 2 is a single-line diagram of a common standby 2-line 2-bank configuration. It is a connection diagram of the arrangement pattern 1 of a housing | casing and apparatus arrangement | positioning in the single wire connection diagram of FIG. It is a connection diagram of the arrangement pattern 2 of a housing | casing and apparatus arrangement | positioning in the single wire connection diagram of FIG. It is a connection diagram of the arrangement pattern 3 of a housing | casing and apparatus arrangement | positioning in the single wire connection diagram of FIG. It is a connection diagram of the arrangement pattern 4 of a housing | casing and apparatus arrangement | positioning in the single wire connection diagram of FIG. It is a connection diagram of the arrangement pattern 5 of a housing | casing and apparatus arrangement | positioning in the single wire connection diagram of FIG. It is a connection diagram of the arrangement pattern 6 of a housing | casing and apparatus arrangement | positioning in the single wire connection diagram of FIG. It is a single line connection diagram of 2 line | wire loop receiving VCT bypass 2 bank structure. FIG. 18 is a connection diagram of an arrangement pattern 1 of housings and device arrangement in the single-line connection diagram of FIG. 17. It is a connection diagram of the arrangement pattern 2 of a housing | casing and apparatus arrangement | positioning in the single wire connection diagram of FIG. FIG. 18 is a connection diagram of an arrangement pattern 3 of housing and device arrangement in the single-line connection diagram of FIG. 17. It is a connection diagram of the arrangement pattern 4 of a housing | casing and apparatus arrangement | positioning in the single wire connection diagram of FIG. It is the single wire connection diagram of the conventional 1MOF type gas insulated switchgear, a housing | casing, and apparatus arrangement | positioning. It is a single line connection diagram of the conventional VCT bypass 2 bank structure. It is a single line connection diagram of the conventional 2VCT2 bank configuration. It is a sectional side view of the conventional gas insulated switchgear. It is a sectional side view of the gas insulated switchgear of Embodiment 3 of this invention.

Embodiment 1 FIG.
Hereinafter, a gas insulated switchgear according to Embodiment 1 of the present invention will be described with reference to the drawings. FIG. 1 shows a side cross section of a gas insulated switchgear. Reference numeral 1 denotes a housing, which includes a door 1a that can be opened and closed on the left side of the figure (the front side of the opening and closing device). Reference numeral 2 denotes an open / close tank in which an insulating gas such as SF6 gas, N2 gas, CO2 gas, and dry air is enclosed. Yes. The cable 5 drawn from the power supply side penetrates into the opening / closing part tank 2 via the cable head 5a, and is connected to the VCB 3 via the disconnector 4 with a grounding function. Further, an arrester 7 connected to the cable 5 side terminal 4a of the disconnector with grounding function 4 via the disconnector with grounding function 4 is disposed in the open / close tank 2.

8 is a bus connection tank filled with an insulating gas such as SF6 gas, N2 gas, CO2 gas, and dry air, and includes

disconnectors

9 and 10 with a grounding function and a disconnector 11, and a

horizontal bus

12 , 13, 14 and 15 and the VCB 3 are connected and disconnected. One terminal of the disconnector with grounding function 10 is connected to one terminal of the VCB 3 via a partition bushing 16 and a connection conductor 17 that hermetically partition between the switching tank 2 and the bus connection tank 8.
The disconnector 11 with a grounding function and the disconnector 11 are connected to the other terminal of the disconnector 9 with a grounding function and connected to the horizontal buses 12 to 15, and the disconnector 9 with a grounding function is connected to the horizontal disconnector 9. Connect / disconnect the circuit between buses 12-15

In the upper part of the busbar connection tank 8, two rows are arranged on the front side (left side in FIG. 1) and the rear side (left side in FIG. 1) of the switchgear, and in two upper and lower stages. A front lower horizontal bus 12, a front upper horizontal bus 13, a rear lower horizontal bus 14, and a rear upper horizontal bus 15 are arranged. For example, the horizontal bus 13 includes three phase separated

conductors

13a, 13b, and 13c arranged in the horizontal depth direction with a predetermined interphase distance. The same applies to the other

horizontal buses

12, 14, and 15.
A bus connection bushing 18 is connected to both ends of the horizontal bus 12 and passes through the bus connection tank 8 and is connected to an internal disconnector 10 with a grounding function. Similarly to the bus connection bushing 18, the bus connection bushing 19 is connected to both ends of the horizontal bus 13 and is connected to the disconnector 10 with a grounding function. The bus connection bushing 20 is connected to both ends of the horizontal bus 14, and the bus connection bushing 21 is connected to both ends of the horizontal bus 15 and is connected to the disconnector 11 in the bus connection tank 8. As shown in FIG. 2, the

bushings

19 and 21 for the upper

horizontal buses

13 and 15 are taller than the

bushings

18 and 20 for the lower

horizontal buses

12 and 14. However, as shown in FIG. 1, the lower part of each bus connection bushing inserted through the bus connection tank 8 has the same shape for both the upper and lower stages, and the grounding function disconnection via the connection conductor 22 The disconnector 11 is connected to the disconnector 11 via the connection conductor 23.
As described above, each circuit branched downward from the horizontal buses 12 to 15 is composed of independent sealed

tanks

2 and 8, and each sealed tank is stored in a casing, and these circuits are It is called a board. Arrangement of these panels in the horizontal direction to constitute an opening / closing device as a predetermined power receiving device is referred to as a row board.

In FIG. 1, four sets of horizontal buses 12 to 15 are illustrated as being arranged in two rows in the front and rear, and two stages in the upper and lower sides, but this is a position (arrangement) passing through each set of horizontal buses 12 to 15. Space), and is actually selectively arranged appropriately. For example, in the connection shown in FIG. 6, VCT (V) is in the center, and one power receiving unit (R) and one transformer unit (F) (unit that feeds power to the transformer) are on the left side (one unit is one panel). ), And one power receiving unit (R) and one transformer unit (F) (unit for feeding power to the transformer) are arranged on the right side. The positions of the horizontal buses 12 to 15 are displayed in the upper left of FIG. Further, F and R are displayed on the upper terminal of VCT (V), which indicates that F is a front terminal and R is a rear terminal.
In the above configuration, the front lower (stage) horizontal bus 12 connects the left transformer unit (F) and the right transformer unit (F), and the front upper (stage) horizontal bus 13 is connected to the left side. The power receiving unit (R) is connected to the right power receiving unit (R), and the rear lower (stage) horizontal bus 14 connects the left transformer unit (R) and the center VCT (V) to the right side. Shows a state where the transformer unit (F) and the power receiving unit (R) are connected, and the rear upper (stage) water bus 15 connects the left power receiving unit (R) and the center VCT (V). It is shown that

By providing such an arrangement space for the horizontal bus, even in various arrangement patterns as will be described later, only a combination of standard boards is required, and an additional unit for connecting between boards as in the prior art is provided between boards. Therefore, the installation area can be reduced because the number of each board can be reduced.

Embodiment 2. FIG.
Next, a gas insulated switchgear according to Embodiment 2 of the present invention will be described with reference to FIGS. The gas insulated switchgear shown in FIG. 3 has a configuration in which the device of FIG. 1 is turned upside down, and horizontal bus bars 12 to 15 are arranged at the lower part of the switchgear. 4 is a rear view of the apparatus shown in FIG. 2 (viewed from the left to the right in the casing shown in FIG. 4). Arranging the horizontal buses 12 to 15 for four lines is the same as in the first embodiment, and the effect of reducing the installation area is also the same. Due to the configuration of the electric chamber, there is an effect in an electric chamber configuration in which the cable 5 is drawn from above.

Embodiment 3 FIG.
Next, a gas insulated switchgear according to Embodiment 3 of the present invention will be described with reference to FIG. The gas-insulated switchgear shown in FIG. 26 is similar to the device shown in FIG. 1, but the position in the depth direction of each phase bus arranged at a predetermined distance in the depth direction of the upper and lower horizontal buses 12 to 15 The upper and lower stages are shifted by a half of the interphase distance. By adopting such a configuration, the bushing position of the upper horizontal bus can be set to an arbitrary position in the row direction regardless of the position of the lower horizontal bus (that is, without being conscious of straddling the lower horizontal bus). The

bus connection bushings

19 and 21 can be disposed.

6 to 21 show various configuration patterns of the power receiving equipment and the connection states of the horizontal buses 12 to 15. The layout space used by the horizontal buses 12 to 15 in each pattern and how to see the use state thereof. Is the same as described above with reference to FIG. 6 (the solid line portion of the horizontal bus position in each figure indicates the position where the horizontal bus lines 12 to 15 are present).

1 Housing 1a Door 2 Open / close tank 3 Circuit breaker (VCB)
4 disconnector with grounding function 4a cable side terminal 5 cable 5a cable head 6 disconnector with grounding function 7 arrester 8 bus connection tank 9 disconnector with grounding function 10 disconnector with grounding function 11 disconnector 12 horizontal bus 12abc each phase bus 13 Horizontal bus 14 Horizontal bus 15 Horizontal bus 16 Compartment bushing 17 Connection conductor 18 Bus connection bushing 19 Bus connection bushing 20 Bus connection bushing 21 Bus connection bushing 22 Connection conductor 23 Connection conductor R Power receiving unit F Transformer unit V VCT

Claims

In the gas-insulated switchgear for receiving power constituted by arranging a plurality of panels, four horizontal bus arrangement spaces for connecting the panels are provided, and the horizontal buses connecting the panels are routed through the arrangement space. Arranged gas insulated switchgear.
The gas-insulated switchgear according to claim 1, wherein the one horizontal bus has three phases.
The gas insulated switchgear according to claim 2, wherein the horizontal buses of each phase of each line are arranged in parallel with each other in the depth direction.
4. The arrangement space according to claim 1, wherein the arrangement space for the four horizontal bus lines is two rows in the vertical direction and two rows in the depth direction when viewed from the front of the panel. The gas insulated switchgear described.
The gas insulated switchgear according to any one of claims 1 to 4, wherein the horizontal bus bar is arranged at an upper portion of the panel.
The gas insulated switchgear according to any one of claims 1 to 4, wherein the horizontal bus bar is disposed at a lower portion of the panel.
The upper horizontal bus arranged in the upper stage in the upper and lower two stages of the arrangement space is arranged vertically above the lower horizontal bus arranged in the lower stage, and the lower horizontal bus is arranged so as to straddle the horizontal direction of the row board. The gas insulated switchgear according to claim 4, wherein
The upper horizontal bus arranged in the upper stage of the two upper and lower arrangement spaces is shifted from the upper vertical direction of the lower horizontal bus arranged in the lower stage by 1/2 of the interphase distance in the longitudinal direction of the panel. The gas insulated switchgear according to claim 4.