JP2625537B2 - Gas insulated switchgear - Google Patents

Description

Description: BACKGROUND OF THE INVENTION The present invention relates to a gas insulated switchgear, and more particularly to a gas insulated switchgear suitable for bus connection and bus separation.

[Prior Art] In general, in a substation composed of gas insulated switchgear, in addition to a gas insulated switchgear unit for a transmission line connected to a transmission line and a gas insulated switchgear unit for a transformer connected to a transformer. A bus insulated switchgear unit for connecting the main buses and a gas insulated switchgear unit for bus separation for separating the main buses are provided, for example, in JP-A-55-83405 and JP-A-55-83405. This is disclosed in JP-A-55-83406 and JP-A-55-100007.

The gas insulated switchgear unit for transmission lines and transformers in this configuration has a relatively simple configuration because only one end thereof is connected to the main bus. On the other hand, the gas insulated switchgear unit for connecting and disconnecting the buses, both ends of which are connected to the main bus, is relatively complicated, and the main bus must be bent or an auxiliary bus must be used.

Further, the above-mentioned gas insulated switchgear unit for bus connection and bus separation is provided with current transformers on both sides of the circuit breaker, respectively, so that the direction of an accident generated by both current transformers can be detected. The specific configuration using a vertical circuit breaker is disclosed in Japanese Patent Application Laid-Open Nos. 58-119715 and 58-119715.
This is introduced in 133105 publication and the like. The gas insulated switchgear unit for bus connection in this case has a vertical circuit breaker arranged on one side of the main bus fixed near the installation surface, and the current transformers provided on both electrical sides of the circuit breaker are connected to the circuit breaker. And the main bus. Such a configuration using a vertical circuit breaker can be installed in a smaller area than a configuration using a horizontal circuit breaker, and is therefore widely used in a system with a lower voltage than in the case of using the latter configuration.

[Problems to be Solved by the Invention] However, a conventional gas insulated switchgear using a vertical circuit breaker, particularly a gas insulated switchgear unit for bus connection and bus separation, is changed between the circuit breaker and the main bus as described above. Since the current transformer is located, the length of the current transformer in the axial direction is actually somewhat large, so that the distance between the main bus and the circuit breaker is large, and the installation area is large. I will.

An object of the present invention is to provide a gas insulated switchgear comprising a gas insulated switchgear unit connected between main buses, which can reduce an installation area, and has a low center of gravity and excellent seismic resistance. To offer.

Means for Solving the Problems In order to achieve the above object, the invention of the present application is provided with a vertical circuit breaker connected between main buses arranged substantially linearly and on both sides of the vertical circuit breaker, respectively. In a gas insulated switchgear provided with a gas insulated switchgear unit having a current transformer, a breaking part is disposed below a vertical circuit breaker in a sealed container, and one current transformer is disposed above and the other current transformer. It is characterized in that the flow breaker is located below the vertical circuit breaker and substantially on the side opposite to the circuit breaker than between the vertical circuit breaker and the main portion of the main bus.

[Operation] According to the configuration of the present invention described above, one current transformer is disposed in the sealed container of the vertical circuit breaker, and the other current transformer is located closer to the anti-breaker side than between the vertical circuit breaker and the main bus. Since it is located, the vertical circuit breaker and the main bus can be brought close to each other, whereby the installation area can be reduced. In addition, since the breaking portion of the vertical circuit breaker is disposed below the inside of the sealed container and the other current transformer is positioned below the vertical circuit breaker, the center of gravity can be lowered and the earthquake resistance can be improved.

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

FIG. 1 is a cross-sectional view of a gas insulated switchgear unit for busbar connection, and FIG. 2 is a longitudinal cross-sectional view of FIG.

As shown in FIG. 2, the main portions of the main buses 40, 50 are arranged vertically and substantially linearly, and a vertical circuit breaker 60 is arranged close to the main buses 40, 50. The vertical circuit breaker 60 has a shut-off portion 8 below the sealed container 6, and a lower terminal of the shut-off portion 8 is finally connected to the main bus 40 via a conductor 9. On the other hand, the upper terminal of the blocking portion 8 is coaxially extended and then connected to the main bus bar 50 via the folded-up substantially inverted U-shaped conductor 4. The current transformer 7a provided between the interrupting portion 8 and the main bus 50 is arranged so as to surround the conductor 4, and is provided above the vertical circuit breaker 60 in the sealed container 6. Further, the current transformer 7b provided between the interrupting section 8 and the main bus 40 is not located between the vertical circuit breaker 60 and the main bus 40 as in the prior art, but as shown in FIG. It is provided on substantially the same axis as the part.

Looking at the connection between the vertical circuit breaker 60 and the main bus bar 50, a sealed portion having a connection portion in a direction orthogonal to the sealed container of the main portion of the main bus bar 50 is provided at the opposing portion of the main bus bar 50 and the vertical circuit breaker 60. There is a container 1 having an insulating space 3a and connected to the sealed container 6 of the vertical circuit breaker 60. The hermetically sealed container 6 is formed with three vertically arranged connecting portions on the side opposite to the main bus, and a central connecting portion is used for connection with the main bus 50. A disconnector 2a is formed in the sealed container 1 by connecting the mover-side conductor to the main bus conductor and connecting the stator to the insulating space 3a side. A grounding switch 42 is attached to a connection portion above the sealed container 6 so that the conductor 4 can be grounded.
The main bus bar 40 is connected to the lower connection portion via the insulating space 3b.

The main portion of the main bus 40 is formed in a straight line as shown in FIG. 1, but the portion facing the vertical circuit breaker 60 has a bent portion 40a which is retracted on the side opposite to the circuit breaker 60 and has a flat U-shape. It has a shape. The current transformer 7b is disposed in the space formed by the bent portion 40a. That is, the sealed container 10 connected to the lower connecting portion of the sealed container 6 is connected to the current transformer 7b located on the same axis as the main bus 40 via the insulating space 3c.
Main bus 40 via the sealed container 12 of the disconnector 2b
Is connected to the main part. The disconnecting section 2b is opened and closed by an operating device.

As described above, the upper part of the sealed container 6 of the vertical circuit breaker 60 is used as a storage part of one current transformer 7a, and the other current transformer 7b is
A bent portion 40a is formed in the main bus bar 40 at a portion corresponding to the vertical circuit breaker 60, and the bent portion 40a is arranged in a space formed by the bent portion 40a. There is no need to form a distance between the breakers 60 for the current transformer 7b. Therefore, the vertical circuit breaker 60 and the main portions of the main buses 40 and 50 can be brought close to each other, and the installation area can be reduced accordingly. In addition, the blocking part 8 is
, And the other current transformer 7b is sealed at a position substantially flush with the main bus 40 located below the vertical circuit breaker 60.
Since it is located within 12, the center of gravity can be lowered and seismic resistance can be improved.

FIG. 3 is a longitudinal sectional view of a bus insulated gas insulated switchgear unit according to another embodiment of the present invention, and FIG. 4 is a transverse sectional view taken along line IV-IV of FIG.

In this embodiment, as in the previous embodiment, the upper part of the sealed container 6 of the vertical circuit breaker 60 is used for accommodating one current transformer 7a, and the main bus 40 at a position facing the vertical circuit breaker 60 is used. A receding bent portion 40a is formed on the side opposite to the circuit breaker, and this bent portion 40a is formed.
The other current transformer 7b is arranged in the space formed by the same, and the same reference numerals are given to the equivalents. However, the detailed arrangement of the current transformer 7b is different from the previous embodiment. That is, as can be seen from FIG. 4, the current transformer 7b is arranged by utilizing the space formed by the bent portion 40a.
Is configured on an axis perpendicular to the main portion of the main bus 40, and has one end connected to the lower terminal of the vertical circuit breaker 60 via the insulating space 3b, and the other end connected to the axis of the main portion of the main bus 40. It is connected to a bent portion 40a on a different axis via an insulating space 3c. In addition, the stator is connected to the insulating space 3c side at the connection between the current transformer 7b and the bent portion 40a, and
Disconnector 2b consisting of the mover side connected to main bus conductor 16 of 40a
And the opening / closing operation is performed by the operation device 42.

According to such a configuration, the bent portion 40a may have to be largely retracted to the side opposite to the circuit breaker as compared with the previous embodiment mainly due to the axial length of the current transformer 7b. It is smaller than the length of the other unit in the same direction, and only the portion corresponding to the vertical circuit breaker 60 may be formed as a bent portion 40a, so that the main busbar 40 has a main body 40 in the axial direction. The other existing units are not affected, and the size can be reduced in the axial direction of the main portion of the main bus bar 40 as compared with the previous embodiment.

FIG. 5 and FIG. 6 are single-line diagrams showing the configurations of the above two embodiments in a perspective view.

As can be seen from both figures, in any of the embodiments, due to the arrangement of the current transformer 7b, the bent portion retracted to the anti-breaker side.
40a is formed, and the space obtained by the bent portion 40a is used. Therefore, the vertical circuit breaker 60 can be arranged close to the main portion of the main bus 40 as if the current transformer 7b is not provided.

FIG. 19 is a plan view of a gas insulated switchgear constituted by using the bus insulated switchgear unit shown in FIGS. 3 and 4.

The main portions of the main buses 40, 50 are vertically formed linearly, and the vertical circuit breakers 60, 61 of each unit are juxtaposed on one side thereof. These juxtaposed vertical circuit breakers 60, 61 are connected to the main buses 40, 50
Are arranged on a line that is substantially parallel to the main body, and are arranged close to each other as in a side-by-side configuration. The vertical circuit breaker 61 constitutes a gas insulated switchgear unit for transmission lines and transformers, and the vertical circuit breaker 60 constitutes a gas insulated switchgear unit for bus connection. In particular, according to the above configuration of the gas insulated switchgear unit for bus communication, the current transformer 7b connected to one terminal of the circuit breaker 60 is connected to the vertical circuit breaker 60 and the main bus.
Instead of being located between the main parts of the main buses 40 and 50, the main buses 40 and 50 are located almost on the side opposite to the circuit breaker. during can be positioned very close proximity to, and the same width can be dimensioned l _2.

To facilitate understanding of this point, one of the current transformers 7a is housed above the sealed container 6 of the circuit breaker 60, while the other current transformer 7b is housed in the same manner as in the conventional case. FIG. 18 shows a gas-insulated switchgear using a bus-insulated gas-insulated switchgear unit provided between the main parts 50 and 50.

As can be seen from this example, the vertical circuit breaker 61 of the gas insulated switchgear unit for transmission lines and transformers has main buses 40 and 50.
Can be placed close to the main part of
In the gas-insulated switchgear unit for bus connection having current transformers 7a and 7b on both sides of the current transformer, the vertical circuit breaker 60 protrudes toward the main bus side by the length of the current transformer 7b as shown in the figure, and the other vessel
Becomes 61 different positions, dimensions l ₁ of the width resulting in large summer. In this case, the foundation of the mounting surface must be aligned with the vertical circuit breaker 60, resulting in a width dimension l _{1 in the} same direction.
> L ₂ becomes, or increasing the installation area, resulting in a cumbersome maintenance and inspection of the vertical breaker. In particular, when configuring a gas insulated switchgear in a building like an underground substation,
This would make the whole building larger.

In the above embodiment, the present invention is applied to the gas insulated switchgear unit for bus connection, but can also be applied to the gas insulated switchgear unit for bus separation. In this case, the fourth
In the figure, the sealed container shown in FIG. 3 is connected to the main part of the main bus 40 on the side of the connection bus 40b and the upper terminal of the vertical circuit breaker 60 except for one connecting bus 40b forming a bent portion 40a of the main bus 40. 1
If the connection is made with another connection conductor, a single bus type gas insulated switchgear unit for bus separation can be obtained.

FIG. 7 is a rear view of a gas insulated switchgear unit for bus separation according to another embodiment of the present invention.

The vertical circuit breaker 60A connects the main bus 40A and the main bus 40B in a separable manner. This vertical circuit breaker 60A is shown in FIG.
As shown in FIG. 10 which is a cross-sectional view taken along the X-ray, the same sealed container 6 as that of the vertical circuit breaker 60 shown in FIG. 2 is used, but is used for connection with the main buses 40A and 40B. 3 formed toward
The upper and lower connecting portions of the two connecting portions are used. The main bus 40A connected to the lower connection portion is connected via a disconnector 2bA and a current transformer 7bA which are arranged on the same axis as the main portion. On the other hand, the upper connection portion has a connection bus 28 extending to the anti-breaker side so as to form a bent portion 40a which is receded to the anti-breaker side for the current transformer 7bB described later, and thereafter, the connection bus 25 and , A main bus through a vertical connection bus 23 shown in FIG. 9 which is a cross-sectional view taken along the line IX-IX in FIG.
It is returned to the same level as the main part of 40B. This connection bus 23
A disconnector 2aA is formed in a sealed container 22 connecting the main part of the main bus 40B and the main bus 40B.

On the other hand, the main bus 50A and the main bus 50B are detachably connected to the vertical circuit breaker 60B. As shown in FIG. 8, which is a cross-sectional view taken along the line VIII-VIII of FIG. The connection conductors 4a and 9a having an appropriate shape are used for the connection between the connection part and the blocking part 8 using the connection part at the upper part and the center part. The main bus 50A is connected to the central connecting portion of the sealed container 6 on the same axis as the main portion of the main bus 50A via the disconnector 2bB and the current transformer 7bB. Since the current transformer 7bB is located in the space formed by the bent portion 40a, the distance between the vertical circuit breaker 60B and the main portion of the main bus 50A does not increase. The upper connection portion of the sealed container 6 is connected to the main portion of the main bus 50B via a disconnector 2aB extending to the side opposite to the circuit breaker and a connection bus 18 for returning the level to the main portion of the main bus 50B. .

In this embodiment, the main bus 40B has a bent portion 40a bent toward the anti-breaker side at a portion facing the current transformer 7bB, and the current transformer 7bB is arranged in a space formed by the bent portion 40a. This is the same as the previous embodiment in that However, since there is no main bus on the anti-breaker side of the current transformer 7bA, there is no bent portion. Therefore, the common configuration of the previous embodiment and the present embodiment is that the current transformer provided on one of the vertical circuit breakers is configured in a sealed container of the vertical circuit breaker, and the other current transformer is the main busbar. In that it is disposed almost on the side opposite to the circuit breaker from the main part of the main bus including the axis of the part. According to this configuration, since the current transformer is not located between the vertical circuit breaker and the main bus, the current breaker and the main part of the main bus are arranged close to each other, and as shown in FIG. The vertical breakers of the unit can be arranged on a straight line substantially parallel to the main bus.

FIG. 11 is a rear view showing a gas-insulated switchgear unit for bus separation according to still another embodiment of the present invention. The current transformers 7bA and 7bB in this embodiment are formed with a bent portion that retreats to the side opposite to the circuit breaker on the main bus of the portion facing the vertical circuit breakers 60A and 60B, and is arranged in the space obtained by the bent portion. doing.

The vertical circuit breaker 60B connected between the main buses 50A and 50B is
As shown in FIG. 12, which is a cross-sectional view taken along the line XII-XII in the figure, the upper and center connecting portions of the sealed container 6 are used. Since the upper connecting portion is above the main portion of the main bus 50B, the connecting portions are connected via the connecting bus 18 as shown in FIG. On the other hand, a current transformer 7bB is connected to the central connection portion, and this current transformer 7bB is not located between the main part of the vertical circuit breaker 60B and the main bus, and is on the side opposite to the main bus. In order to achieve this, a bent portion 50a including the main portion of the main bus bar and retreating thereafter is formed. As can be seen from FIG. 15 which is a cross-sectional view taken along the line XV-XV in FIG.
7bB is arranged on substantially the same axis as the main part of the main bus 50A, 50B, and the vertical circuit breaker 60B and the main bus 50A, 50B
It is not located between the main parts. Therefore, the vertical circuit breaker 60
B can be brought closer to the main part of the main buses 50A and 50B by that much, and the installation area can be reduced. The bent portion 50a retreated to the side opposite to the circuit breaker has a connection bus 31 and is connected to the main portion of the main bus 50A by the connection bus 31.

Looking at the vertical circuit breaker 60bA, XIII-
As shown in FIG. 13, which is a cross-sectional view along the line XIII, the main bus 40A,
Connected between 40B. The main bus 40B connected to the upper connection portion uses a connection bus 28 extending to the side opposite to the circuit breaker in order to avoid the main bus 50A described above, and thereafter, the vertical connection bus of FIG. Connected to 23 and disconnector
It reaches the main part of the main bus 40B via 2aB. In addition, sealed container 6
The main bus 40A connected to the lower connection portion is connected via a current transformer 7bA extending to the side opposite to the circuit breaker as shown in FIG. This current transformer 7bA is almost vertical breaker 60A and main bus 40
In order not to be located between the main parts of A, a bent part 40a is formed on the main bus 40A, which is receded toward the side opposite to the circuit breaker, and then returned to the same position as the main part via the connection bus 24 shown in FIG. ing.

In this way, the current transformers 7bA and 7bB connected to the lower terminals of the vertical circuit breakers 60A and 60B can be configured on the shaft extending to the side opposite to the circuit breaker, and can be substantially connected to the main portion of the main bus as in the related art. It is not located between the vertical breakers, so the vertical breakers 60A, 60B
Can be arranged close to the main part of the main bus, and can be installed at the same position as the vertical circuit breakers of the gas insulated switchgear unit for other transmission lines and transformers, thereby reducing the installation area. Further, the blocking portions 8a and 8b are arranged below the sealed container 6,
Since the other current transformer 7bA is arranged in a sealed container at the same height as the main buses 40A and 40B located below the vertical circuit breaker 60A, the center of gravity can be lowered and the earthquake resistance can be improved.

FIG. 16 and FIG. 17 are single-line diagrams corresponding to FIG. 7 and FIG. The current transformers 7bA and 7bB in FIG.
All are on the axis of the main part of the main bus 40A, 40B, 50A, 50B, and the main part of the main bus and the vertical circuit breakers 60A, 60B as in the past.
Not located between. Main bus 4 for current transformer 7bB
A bent portion 40a which is set back on the side opposite to the circuit breaker is formed in 0B, and the current transformer 7bB can be arranged by the bent portion 40a.

The current transformers 7bA and 7bB in FIG. 17 are main buses 40A and 50A.
The bent portions 40a and 50a are formed on the side opposite to the circuit breaker, and are arranged in the space obtained by this.Therefore, the current transformers 7bA and 7bB are located closer to the circuit breaker than the main part of the main bus. As a result, the vertical circuit breakers 60A, 60B and the main parts of the main buses 40A, 40B, 50A, 50B can be arranged close to each other, and the installation area can be reduced.

[Effects of the Invention] As described above, according to the present invention, one current transformer is disposed in the sealed container of the vertical circuit breaker, and the other current transformer is more anti-blocking than between the vertical circuit breaker and the main bus. Since it was located on the container side,
The installation area can be reduced by bringing the vertical circuit breaker and the main bus close to each other, and the breaking part of the vertical circuit breaker is arranged below the sealed container, and the other current transformer is connected to the vertical circuit breaker. , The center of gravity can be lowered and seismic resistance can be improved.

[Brief description of the drawings]

1 and 2 are cross-sectional and longitudinal sectional views showing a main part of a gas-insulated switchgear according to one embodiment of the present invention, and FIGS. 3 and 4 are gas-insulated switches according to another embodiment of the present invention. 5 and 6 are single-line diagrams of FIGS. 1 and 3, and FIG. 7 is a gas insulation according to still another embodiment of the present invention. The rear view of the switchgear, FIGS. 8, 9 and 10 are VIII-VIII in FIG.
11 is a sectional view taken along line IX-IX and XX, FIG. 11 is a rear view of a gas insulated switchgear according to still another embodiment of the present invention, FIG. 12, FIG. 13, FIG. Fig. 15 shows the XI of Fig. 11.
Sectional views along lines I-XII, XIII-XIII, XIV-XIV and XV-XV, FIGS. 16 and 17 are single-line diagrams of FIGS. 7 and 11, and FIG. 18 is a comparison. FIG. 19 is a plan view of a gas-insulated switchgear according to the present invention. 6 ... sealed container, 7a, 7b, 7aA, 7aB, 7bA, 7bB ... current transformer, 4
0,40A, 40B …… Main bus, 40a, 50a …… Bent, 50,50A, 50B
... Main bus, 60 ... Vertical circuit breaker.

Claims (5)

(57) [Claims] 1. A gas insulated switchgear unit comprising a main bus arranged substantially linearly and a gas insulated switchgear unit connected between the main buses, the gas insulated switchgear unit comprising: a vertical circuit breaker;
In a gas insulated switchgear having current transformers provided on both sides of the vertical circuit breaker, a circuit breaker is provided below the vertical circuit breaker in a sealed container, and one current transformer is provided above the vertical circuit breaker. Gas insulation, wherein the other current transformer is disposed below the vertical circuit breaker and on the side opposite to the circuit breaker than between the vertical circuit breaker and the main part of the main bus. Switchgear. 2. A gas insulated switchgear unit connected between main buses arranged substantially linearly, said gas insulated switchgear unit comprising a vertical circuit breaker arranged on one side of said main bus, In a gas insulated switchgear having current transformers provided on both sides of the vertical circuit breaker, a circuit breaker is provided below the vertical circuit breaker in a sealed container, and one current transformer is provided above the vertical circuit breaker. And the other current transformer is positioned below the vertical circuit breaker and substantially on the side opposite to the circuit breaker than between the vertical circuit breaker and the main body having a substantially linear configuration on the main bus. A gas-insulated switchgear, characterized in that it is made to operate. 3. A gas insulated switchgear unit connected between main buses arranged substantially linearly, the gas insulated switchgear unit comprising a vertical circuit breaker arranged on one side of the main bus, In a gas insulated switchgear having current transformers provided on both sides of the vertical circuit breaker, a circuit breaker is provided below the vertical circuit breaker in the sealed container, and one current transformer is provided above the vertical circuit breaker. The respective main buses disposed below the circuit breaker form a bent portion which is set back on the side opposite to the circuit breaker side of the main portion of the linear configuration at a portion corresponding to the other current transformer. A gas-insulated switchgear, wherein the other current transformer is arranged in a space obtained by the bent portion. 4. The gas insulated switchgear according to claim 3, wherein the other current transformer is disposed on substantially the same axis as the main portion of the main bus, with its axial direction aligned. . 5. The gas insulated switchgear according to claim 3, wherein the other current transformer is disposed on an axis substantially perpendicular to a main portion of the main bus so as to match its axial direction. apparatus.