CN1331285C - Gas insulation switch device - Google Patents

Abstract

In the gas insulated switchgear provided with a first current transformer unit 10 on one side of a circuit breaker unit 30 and a second current transformer unit 20 on the other side, both the first current transformer unit 10 and the second current transformer unit 20 are arranged on one side face side of the circuit breaker unit 30. Since both the first current transformer unit and the second current transformer unit are arranged on one side face of the circuit breaker unit and no current transformer unit is arranged on the other side face of the circuit breaker, the volume being occupied by the current transformer units in the gas insulated switchgear can be reduced. Consequently, the gas insulated switchgear can be made compact and installation space can be reduced.

Description

Gas Insulated Switchgear

technical field

The present invention relates to a gas insulated switchgear, and more particularly to a gas insulated switchgear suitable for having a plurality of converter units for current measurement of a main circuit of an electric power system.

Background technique

A gas insulated switchgear (hereinafter, referred to as GIS) is constructed by enclosing an insulating gas such as SF ₆ gas in a sealed container, and housing various electrical equipment such as a circuit breaker, a converter, and a switch therein. A general GIS is constructed by dividing various electric devices into a plurality of units, and storing each unit in a gas-enclosed container.

In a typical GIS, converter units are provided on both sides of a circuit breaker unit for the main circuit ammeter side of the power system. In addition, each converter unit usually includes a plurality of converters, and conductors serving as current paths are provided so as to pass through the coils of these converters.

As an example of installation of the converter unit in the GIS, a bus-side converter unit is provided above the breaker unit (for example, see Patent Document 1).

Patent Document 1 JP-A-2000-125426 Publication (claims, FIG. 1 ).

Contents of the invention

The technical specifications and number of converters vary depending on the requirements of the multiple protective relays, so the installed converter unit and the overall length of the conductors for the converter vary greatly in each case. When the bus-side converter unit is arranged in the height direction of the upper part of the circuit breaker unit, the height of this part becomes very high. When the busbar-side converter unit is installed between the busbar unit and the circuit breaker unit, not in the height direction above the circuit breaker unit, the overall length of the GIS becomes longer.

GIS is installed indoors and underground in many cases, and a compact structure is desired. However, in the structure of the conventional GIS, since the space occupied by the converter unit in the GIS is large, the GIS is large.

The problem to be solved by the present invention is to provide a GIS that can make the overall structure compact.

The present invention is a GIS having a bus bar unit on one side and a line unit on the other side across a circuit breaker unit, and is equipped with first and second converters for current measurement of a main circuit The unit is characterized in that the first and second converter units are arranged on one side of the circuit breaker unit.

Furthermore, it is a GIS provided with a line connecting two busbar units, a first converter unit is provided between the above-mentioned busbar unit and the circuit breaker unit on one side, and between the busbar unit and the above-mentioned circuit breaker unit on the other side A second converter unit is provided between the units, and both the first and second converter units are arranged on one side of the circuit breaker unit.

In the present invention, all converter units are collectively arranged on one side of the circuit breaker unit. Therefore, the space occupied by the converter unit in the GIS can be reduced, so the GIS can be made into a very compact structure.

Description of drawings

Fig. 1 is a front view showing a gas insulated switchgear according to a first embodiment of the present invention;

Fig. 2 is a circuit configuration diagram of the gas insulated switchgear of the first embodiment;

Fig. 3 is an A-A sectional view of the gas insulated switchgear of Fig. 1;

Fig. 4 is a B-B sectional view of the gas insulated switchgear of Fig. 1;

Fig. 5 is a front view showing a gas insulated switchgear according to another embodiment of the present invention;

Fig. 6 is a circuit configuration diagram of a gas insulated switchgear of a second embodiment;

Fig. 7 is a C-C sectional view of the gas insulated switchgear of Fig. 5 .

in the picture

10...first converter unit 20...second converter unit 30...breaker unit

40...first bus unit 50...second bus unit 60...line unit

101...first converter 102...conductor for converter 103...box for converter

201...second converter 202...conductor for converter 203...box for converter

301...Breaking unit 302...Conductor for circuit breaker 303...Operator for circuit breaker,

401... Grounding circuit breaker for busbar 402... First busbar conductor

501... Grounding circuit breaker for busbar 502...Second busbar conductor

601...Earth circuit breaker for line 602...Cable joint 603...Transformer for measuring instrument

604...Earth switch

Detailed ways

Next, embodiments of the GIS of the present invention will be described with reference to the drawings. However, the present invention is not limited to these examples.

FIG. 2 shows an example of a circuit configuration diagram of the GIS of this embodiment. In FIG. 2 , it is connected to one line via a bus grounding breaker 401 branched from the first bus conductor 402 and a bus grounding breaker 501 branched from the second bus conductor 502 . In this line, there are provided: a first converter 101 as a bus-side converter, a circuit breaker 301, a second converter 201 as a line-side converter, a line grounding circuit breaker 601, and a grounding switch 604. In addition, a measuring instrument transformer 603 and a cable joint 602 are connected. The GIS of this embodiment includes: a converter 101 , a circuit breaker 301 , a converter 201 , a line grounding circuit breaker 601 , a grounding switch 604 , a measuring instrument transformer 603 and a cable connector 602 .

FIG. 1 shows a front view of a GIS having the circuit configuration of FIG. 2 . In addition, FIG. 3 shows the A-A sectional view of FIG. 1 , and FIG. 4 shows the B-B sectional view of FIG. 1 .

In FIG. 1 , FIG. 3 and FIG. 4 , the first bus bar unit 40 has a first bus bar conductor 402 and a bus bar grounding breaker 401 . In addition, the second bus bar unit 50 includes a second bus bar conductor 502 , a bus bar grounding breaker 501 , and breaker operators 403 , 503 . The breaker conductor 302, which is branched from the first bus conductor 402 and the second bus conductor 502 and gathered into one, passes through the upper part of the breaking part 301 in the breaker unit 30, and is connected to the first bus-side converter unit. A converter conductor 102 of the converter unit 10 .

The first converter unit 10 is arranged on the opposite side of the first bus unit 40 and the second bus unit 50 with the circuit breaker unit 30 interposed therebetween. In the unit 10 for the first converter, there is a box 103 for the converter. In this box, the first converter 101 is placed horizontally, that is, the conductor 102 for the converter is accommodated so that it passes through the side of the converter 101 in the horizontal direction. inside the coil.

The circuit breaker 30 has a circuit breaker 301 . In addition, at the lower part of the circuit breaker unit, an operator 303 for a circuit breaker is provided, and this operator accommodates a mechanism for operating a movable part at the time of inputting and breaking operation. The operator 303 for the circuit breaker is fixed on the frame.

On the opposite side of the breaker unit 30 to the busbar unit, a second converter unit 20 as a line-side converter unit is arranged. In FIG. 1 , the first inverter unit 10 is arranged on the upper side, and the second inverter unit 20 is arranged on the lower side. The structure of the unit 20 for the second converter is the same as the unit for the first converter, and the box 203 for the converter is also provided, and the second converter 201 is arranged laterally in the box, and the conductor 202 for the converter is configured as follows: It passes through the coil forming the second converter. Subsequently, the converter conductor 202 is connected to the conductor in the line unit 60 .

The line unit 60 accommodates a line ground breaker 601 , a measuring instrument transformer 603 , a cable joint 602 , a ground switch 604 , and a ground breaker operator 605 . The cable joint 602 is fixed to the same frame as the breaker operator 303 for fixing the breaker unit.

In FIG. 1 , the current flowing through the first bus unit 40 and the second bus unit 50 enters the first converter unit 10 , passes through the converter conductor 102 , and then enters the circuit breaker unit 30 . Then, the current flowing out of the breaker unit 30 flows into the line unit 60 through the converter conductor 202 of the second converter unit 20 .

Both the first converter unit 10 and the second converter unit 20 are configured in a triangular arrangement in which outer peripheries of three-phase converters approach each other. In addition, the first converter unit is configured in such a way that the conductors of the three-phase converters each pass through the center of the coil from the first end in the unit, and then turn back at the second end to pass through the transformer. The space outside the flow device is directed towards the path of the first end. Specifically, in the first converter unit, the first conductor that penetrates the inside of the first converter starts from the busbar unit and passes through the inside of the first converter, then turns back, and passes through the second and third converters. The proximate peripheral side is connected to a circuit breaker unit. In addition, the second conductor penetrating the inside of the second converter passes from the busbar unit through the outer peripheral side portion where the first and second converters are close, then turns back, penetrates the inside of the second converter and is connected to the circuit breaker unit. Furthermore, the third conductor penetrating inside the third converter passes from the busbar unit to the outer peripheral side where the first and third converters are close, then turns back, penetrates the inside of the third converter and is connected to the circuit breaker unit.

According to Embodiment 1, since the first converter unit and the second converter unit are arranged on the same side of the circuit breaker unit, the space occupied by the converter unit in the GIS can be reduced, so the GIS can be made It's very compact.

The first converter unit and the second converter unit may not be arranged horizontally but vertically. However, since the height becomes high, the horizontal arrangement is optimal in consideration of the size of the actual device.

The first converter unit and the second converter unit may also be arranged on the side of the circuit breaker unit located on the side of the busbar unit. However, it is not a good idea to arrange the second converter unit as the line-side converter unit on the side of the busbar unit in the structure in which the conductors and disconnecting parts of the three-phase circuit are housed in the box. Recommendation: Arrange the first converter unit and the second converter unit on the side of the circuit breaker unit on the opposite side of the busbar unit.

When the first converter unit is arranged on the side of the breaker unit on the opposite side of the busbar unit, the converter conductors of the first converter unit are structured such that they pass through the coils of the converter. After inside, it must be turned back to return in the original direction. In such a case, it can pass through the coil of the converter, then turn back and pass through the outside of the converter to return to the original direction; inside the coil of the choke to return to its original direction. All in all, you can choose either one.

In this embodiment, as shown in FIG. 1 , the central positions of the first busbar unit 40 and the first converter unit 10 are approximately in the same configuration. In addition, the positions of the second busbar unit 50 and the second converter unit 20 The central location is a roughly consistent configuration. When the converter unit is inserted between the bus bar unit and the circuit breaker unit, since the height of the converter and the bus bar are made to be the same, the effect of sharing the units can be obtained.

Example 2

In this embodiment, an example in which a GIS is installed in a line for connecting two busbar units will be described. FIG. 6 shows a circuit configuration diagram in the case where a GIS is installed on a line connecting two bus bars. In Fig. 6, in the line connecting the first bus conductor 402 and the second bus conductor 502, there are arranged in order from the direction of the first bus conductor: the grounding circuit breaker 401 for the bus, the first converter 101, and the disconnecting part 301, the second converter 201 and the grounding circuit breaker 501 for the busbar.

FIG. 5 shows a front view of a GIS having the circuit configuration of FIG. 6 . In addition, FIG. 7 shows a C-C sectional view of FIG. 5 . In FIGS. 5-7, the same symbols as those in FIGS. 1-4 denote the same components. As shown in FIG. 7 , the first converter unit 10 and the second converter unit 20 are configured in a triangular arrangement in which the outer peripheries of the three-phase converters approach each other.

In this embodiment, the two converter units that should be provided on both sides of the circuit breaker unit are also arranged on one side of the circuit breaker unit, so the occupied converter units in the GIS can be reduced space, and the GIS can be made very compact.

In addition, as shown in FIG. 5, since two busbar units are arranged side by side on one side of the circuit breaker unit, and two converter units are arranged between the two busbar units arranged side by side and the circuit breaker unit, in this way, GIS can be made more compact.

In this embodiment, as shown in FIG. 5 , the central positions of the first busbar unit 40 and the first converter unit 10 are also roughly in the same configuration. In addition, the second busbar unit 50 and the second converter unit 20 The center position of is also roughly the same configuration. When the converter unit is inserted between the bus bar unit and the circuit breaker unit, since the height of the converter unit is equal to that of the bus bar, it is possible to share the commonality of the units as described in the first embodiment. effect.

According to the present invention, since the space of the converter unit occupied in the GIS is reduced, the GIS can be made compact. In this way, the installation area of the GIS can be reduced, and it can be easily installed indoors.

Claims (8)

1. gas-insulated switchgear device, it has the bus unit across breaker unit in a side, has line unit at opposite side, also has first and second converter cells of the electric current instrumentation that is used for main circuit, it is characterized in that,

Side at above-mentioned breaker unit, the above-mentioned first and second converter cell both sides have been disposed, above-mentioned first and second converter cells are configured between above-mentioned breaker unit and the line unit, and configuration up and down, simultaneously, at the upside of above-mentioned breaker unit, dispose the conductor that connects the above-mentioned bus unit and first converter cell.

2. gas-insulated switchgear device according to claim 1 is characterized in that,

Above-mentioned first and second converter cells all are configured the current transformer horizontally set.

3. gas-insulated switchgear device according to claim 2 is characterized in that,

Above-mentioned first and second converter cells, current transformer connect in the converter coils in the horizontal direction with conductor and are configured.

4. gas-insulated switchgear device according to claim 3 is characterized in that,

The current transformer conductor of above-mentioned first converter cell is turned back after being constituted as in connecting above-mentioned converter coils and the outside by this converter cell turns back to identical direction.

5. gas-insulated switchgear device according to claim 1 is characterized in that,

Above-mentioned bus unit has three-phase integrated type structure, and above-mentioned first converter cell and second converter cell all are the mutual approaching triangular arrangement of periphery of the current transformer of three-phase.

6. gas-insulated switchgear device according to claim 5 is characterized in that,

Above-mentioned first converter cell has such path:

The conductor of the current transformer of three-phase, each first end in the unit connect to constitute after the center of coil of current transformer, turn back at the second end, and the space tomorrow by the current transformer outside is to the path of above-mentioned first end.

7. gas-insulated switchgear device according to claim 5 is characterized in that,

Above-mentioned first converter cell, the first, the second, the 3rd current transformer are the approaching respectively triangular arrangement of periphery separately;

Connect first conductor of the above-mentioned first current transformer inside, after connecting the first current transformer inside, turn back, and be connected to breaker unit by the approaching periphery sidepiece of the above-mentioned second and the 3rd current transformer from the bus unit;

Connect second conductor of the above-mentioned second current transformer inside, from above-mentioned bus unit by the approaching periphery sidepiece of above-mentioned first and second current transformers after, turn back, and connect the above-mentioned second current transformer inside and be connected to above-mentioned breaker unit;

Connect the 3rd conductor of above-mentioned the 3rd current transformer inside, from above-mentioned bus unit by the approaching periphery sidepiece of the first and the 3rd current transformer after, turn back, and connect above-mentioned the 3rd current transformer inside and be connected to breaker unit.

8. gas-insulated switchgear device according to claim 1 is characterized in that,

Up the center of Pei Zhi above-mentioned bus unit and above-mentioned first converter cell and below the above-mentioned bus unit of configuration and the center of above-mentioned second converter cell, all be configured to roughly consistent.

Images