JPS5910109A - Gas insulated switching device - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION [Technical Field of the Invention] The present invention relates to a gas insulated switchgear particularly suitable for ultra-super high voltage substations and switchyards.

[Technical background of the invention]

It is desirable to install so-called gas-insulated switchgear in substations or switchyards installed around large cities or in coastal areas, due to the difficulty of obtaining land or to prevent salt damage.

By the way, in order to significantly reduce the site area of this type of substation, the necessary equipment is arranged three-dimensionally, and the connections between each equipment are made using gas-insulated busbars filled with insulating arc-extinguishing gas such as 8F6 gas. It is configured to be carried out by

In order to achieve such a three-dimensional arrangement, a relatively heavy breaker is usually installed below, and instrument current transformers, disconnectors, etc. are arranged vertically and horizontally above the breaker via branch busbars. be done.

Furthermore, for accidents, inspections, repairs, etc., the gas insulated switchgear is usually divided into gas sections by insulating spacers, so that only this section can be separated. Furthermore, since ultra-high voltage substations are installed on important power main lines, it is desirable that power outage times due to accident inspections and repairs be as short as possible.

In FIG. 1, which shows an example of a single-line diagram of a gas-insulated switchgear in a general substation or switchyard as described above, the portion surrounded by two dotted lines will be described. From the power receiving and transmitting port, the power flows from the bushing (1), through the disconnector (2), through the circuit breaker (3), and then to the busbar side disconnector (5-1).

Main bus (6-1) of double main bus (6) via (5-2)
).

(6-2) respectively. Also, the opposite side is the main bus line (
6-1) and (6-2) to the bus side disconnector (7-
1') and (7-2), the power is transmitted and received from the cable head (9) through the circuit breaker (8). The bushing (1) side is connected to a lightning arrester (river, grounding device (tOa)), and the cable head (9) side is connected to a lightning arrester H,
A grounding device (lla) is connected. In addition, breaker +3
1, (8) are equipped with instrument current transformers H, (
12a): (l row, (13a) is connected.

FIG. 2 shows a side view of one line of a conventional gas-insulated switchgear compatible with such a single-line diagram.

Busbar side disconnector (5-1), (5-2) is the breaker (3)
The axial direction of the breaking part and the main generatrix (6-1'), (6
-2) is arranged at a point where the axial directions of the respective upper openings intersect.

[Problems with background technology]

On the other hand, as shown in Figure 3, the insulating spacer for the gas compartment is connected to the container (a) of the gas insulated equipment.
It is usually shaped like Mt. Fuji in order to stabilize the internal electric field. Therefore, the structure is such that the conductors (2) on both sides of this insulating spacer (21) cannot be removed except by pulling them out along the axial direction of the conductors (22).

Therefore, when removing the busbar side disconnector (5-1) for inspection etc., even if the removable busbar (to) is removed, the busbar side disconnector (5-1) and breaker (3) should be separated into gas compartments. The connection part (A) is connected through an insulating spacer, and the connection where the bus-side disconnect switch (5-1) and the main bus (6-1) are connected through an insulating spacer that separates the gas. The axial direction of each conductor is perpendicular to the other. Moreover, this connection (
A) and (27) have the same structure as the connection part @ shown in FIG. For this purpose, as mentioned above, the busbar side disconnector (5-
1) cannot be moved horizontally or vertically and cannot be removed. Therefore, when removed, the lock, bushing (1), grounding device (tOa), disconnector (2), instrument current transformer (13, L), disconnector (3), instrument current transformer (12
This is not possible unless you remove everything in the order of a). However, a long-term power outage at such an ultra-high-voltage powerhouse would have a large impact on the surrounding area, and there were problems that needed to be improved.

[Purpose of the invention]

The present invention has been made in consideration of the above points, and its purpose is to eliminate the need to move gas-insulated equipment vertically above the main bus bar by moving other equipment, such as a bus-side disconnect switch. It is an object of the present invention to provide a gas insulated switchgear that can be easily attached and detached in a short time.

[Summary of the invention]

In order to achieve this object, the present invention arranges the axial direction of the breaker section horizontally and perpendicularly to one and two main generatrix lines,
On the upper side of this breaker, an upwardly facing part is formed with one projecting part opened in the vertical direction, and one connection port of the first gas insulated equipment and one connection port of the second gas insulated equipment are formed. At the same time, connect the connection port opening vertically downward to the other side, and the connection port opening vertically to the upward facing part of the breaker and above one main busbar of the double main busbar. , are connected to each other via vertically removable connection parts, and 2
By connecting the first gas insulated devices provided above the heavy main bus bar through the respective connection parts through the attachment/detachment bus bar, the time required to attach and detach the first and second gas insulated devices is shortened and made easy. It is characterized by the fact that Note that it is preferable that the first gas insulated device is a busbar side disconnector and the second gas insulated device is a grounding device.

[Embodiments of the invention]

DESCRIPTION OF THE PREFERRED EMBODIMENTS A gas insulated switchgear according to an embodiment of the present invention will be described below with reference to the drawings. The same parts and parts having the same functions as those shown in FIGS. 1 to 3 are given the same reference numerals.

FIG. 4 shows a plan view of the gas insulated switchgear of the present invention corresponding to the single line diagram of FIG. 1, and FIG. 5 shows a side view of the gas insulated switchgear of one line. In Fig. 4, the axial direction of the breaker parts of the dual breaker (3) and (8) is orthogonal to the axial direction of the main bus lines (6-1) and (6-2) of the double main bus line. Both the bushing (1) side and the cable head (9) side are arranged in a three-phase configuration.

Note that the breaker (not shown) of the circuit breaker +31, +8) has a pair of contacts facing each other so as to be able to approach and separate from each other, and one or more of these breaker parts are connected in series. , the contacts are arranged so that the axial direction in which they approach and separate is horizontal.

In FIG. 5, each of the main busbars (6) of the double main busbar (6)
-1), (6-2) connection part t27), (2
7) respectively gas insulated equipment such as busbar side disconnector (s
-1) and (5-2) are attached together, and they are connected to each other via the outside of the detachable bus. One connection port of the busbar side disconnector (5-1) and a gas insulated device such as a grounding device (5-ia
) to one of the connection ports. And the grounding device (
The other grounding port of 5-1a) is connected to the upward sunrise part (3a) provided on the upper side of the circuit breaker (3) via the connection part (a).

The other sunrise part of the breaker (3) is connected to the bushing (1) via the disconnector (2) and the connection busbar (2a), and via a grounding device (10a) connected to the lightning arrester OI. In addition, the pull-out part (21G shown by the two-dot chain line) for inspection of the breaker (3) can be pulled out to the bushing (1) side.Furthermore, the main parts of the above-mentioned connection configuration will be explained in detail in FIG. Container on the main bus (6-1) side of the breaker (3) (
7) On the upper side, there is an upward sunrise part el that opens vertically upward.
form l). In addition, connect one vertically downwardly opened connection port (to) of the grounding device (5-1a) disposed above the breaker (3) to the upwardly facing sunrise part a1) through the connection part (a). ' to connect. Earthing device (5-13) breaker (
3) The other connection port (G) provided along the axial direction of
The bus bar side disconnector (5-
Connect to the connection port (c) in 1). Birth mother # (6-1),
A connection port ((1) that opens vertically upward on the upper side of (6-2)
), (to), connection ports Gn opened vertically downward of the busbar side disconnectors (5-1) and (5-2).

G7) are connected through the connection parts (2v'+ and @.In addition, the connection between the busbar side disconnector (5-1') and (5-2) is made by the detachable busbar (to) via the bellows (to). Connected.

Since the connection parts (4), @, and @ all have the same structure, the connection part (a) on the upper side of the live mother a (6-1) will be explained. A cone-shaped insulating spacer 09 is airtightly connected between the connection ports (g) and c'<7) via flanges (36a) and (37&)'tl-, respectively. Insulating spacer C3 again! Hollow conductors (41) and +43 are respectively connected to the connection members (41) provided on the top of the 1.

Next, the effects of the present invention will be explained. When removing the bus-side disconnector (5-1) for inspection or repair, first remove it from the work opening (ZSa) of the detachable bus (to) between the bus-side disconnector (5-1) and (5-2). Pull out the conductor (not shown) so as to shorten it in the axial direction, contract the bellows (toe) to make room, and then remove the attachment/detachment bus bar (toe). Then, remove the bolts (not shown) at the connection part (a) and @, and then connect the grounding device (5-1a) and bus-side disconnector (5-1) vertically upward via an integrated hoist, for example, via a lifting device. By lifting the conductor 02 and the connecting member (40), the conductor 02 and the connecting member (40) can be pulled out and removed.
It is also possible to pull out the conductor f41) and the connecting member (4G) without leaving them on the lower side of the connector. The busbar side disconnectors (5-1) and (5-2) can be attached and detached without moving any other equipment.Therefore, the time required for inspection or parts replacement can be extremely shortened, making work easier, and preventing power outages. The time can be significantly reduced.

Next, second and third embodiments of the present invention will be described with reference to the drawings. Parts that are the same as or have the same functions as those shown in FIG. 5 are given the same reference numerals. In the second embodiment of the present invention, in FIG. 7, the breaker (3) should be inspected, that is, the drawer part (end) at the time of inspection is on the opposite side to that in FIG. 5, that is, on the main bus bar (6-1) side. Place it so that it faces. The axial direction of the breaker (3) of the grounding device (5-1a), that is, the horizontal part in the illustration, is formed to be long. The attachment and detachment of the busbar side disconnector (5-1) and the grounding device (5-1a) are the same as in the first embodiment of the present invention.

Further, in the third embodiment of the present invention, in FIG. 8, the sunrise part on the bushing (1) side of the breaker (3) is
Even if it is arranged in the axial direction, that is, in the horizontal direction in the drawing, the same effects as in the first embodiment of the present invention can be obtained.

In all of the above embodiments, the line on the bushing +11 side is
However, the line on the cable head (9) side can also provide the same effects as the embodiments of the present invention.

Although the first gas insulated device is described as a busbar-side disconnector and the second gas insulated device is a grounding device, the arrangement of the two may be interchanged. It is also possible to replace the grounding device with a full branch busbar and add a grounding device to the busbar side disconnector.

〔Effect of the invention〕

As explained above, according to the gas insulated switchgear of the present invention, the main bus side and the breaker side of the first gas insulated device and the second gas insulated device are connected via the connection part that can be attached and detached in the vertical direction. This makes it possible to attach and detach the first and second gas insulated devices without moving other devices as in the past, reducing the time required to attach and detach them, making the work easier, and significantly reducing power outage time. can be shortened to

[Brief explanation of drawings]

Figure 1 is a single-line diagram showing a general gas-insulated switchgear, Figure 2 is a side view of a conventional gas-insulated switchgear corresponding to one line in the single-line diagram in Figure 1, and Figure 3 is a general-purpose gas-insulated switchgear. FIGS. 4 and 5 are a plan view and a side view of the bushing side line showing a gas insulated switchgear according to an embodiment of the present invention, and FIG. 6 is a cross-sectional view showing the gas insulated switchgear shown in FIG. A partially cutaway side sectional view showing the device, and FIGS. 7 and 8 are side views showing gas insulated switchgears according to second and third embodiments of the present invention. +1)...Bushing (2)...Disconnector f3
), (8)... Breaker (5-1), (5-2), (7-1), (7-2)...
・Bus-side disconnector (5-1a), (7-2a) ---Grounding device (6)...Double main bus (6-1), (6-2)...Main bus (9) ...
Cable head +10), (11)...Surge arrester (1)
0a), (tta) +++ Grounding device (company)...Detachable busbar (2 divisions i,,, connection part C) 1)...Upward sunrise part 0 (branch)) theory...Connection port proxy Person Patent Attorney Inoue - Male No. 1 Figure 2 Figure ≦-l Otsu-B 23 Figure 4 Figure 5 Figure ρ fLI125 4-7 Otsu-2 Figure 7 Figure 8, O4-/ Otsu-2

Claims (2)

[Claims] (1) A breaker housing a breaker having a pair of contacts that can be moved toward and away from each other is horizontally arranged along the axial direction in which the contacts move toward and away from each other, and the breaker is arranged so as to be mutually orthogonal to the axis of the breaker. A double main bus bar is arranged horizontally in parallel with the first gas insulated equipment, and a connection port provided above each of the double main bus bars is connected to the vertically lower part of the first gas insulated equipment through a connecting part that can be attached or detached in the vertical direction. and connecting the first gas insulated devices to each other via a removable bus bar, the breaker is connected to the connection ports provided at The sunrise portion provided with an opening and the connection port provided vertically below the second gas insulated device placed above the sunrise portion are connected to each other via vertically removable connection portions, respectively. A gas insulated switchgear further comprising a second gas insulated device and a first gas insulated device facing the second gas insulated device. (2) The gas insulated switchgear according to claim 1, wherein the first gas insulated device is a busbar side disconnector, and the second gas insulated device is a grounding device.