JPH02114806A - Gas insulated electrical facility and gas insulated compensation reactor therefor - Google Patents

Abstract

PURPOSE:To reduce the installation space by equalizing the width of a container at a section for containing a disconnecting switch and a compensation reactor connected with the primary neutral point of a ground insulation switchgear connected with a gas insulated device to the width of the gas insulated device and containing them in a same container. CONSTITUTION:An insulated transformer GT is arranged at the lower section of a container 10 where the primary of the transformer GT is connected in star and the neutral point thereof is connected through a connecting conduit 25 with the fixed contact 22 of a disconnecting switch DSo. A compensation reactor CRe is fixed above the container 10 and connected through a connecting conduit 24 with a movable contact 20 such that it moves between the fixed contact 22 for the disconnecting switch and the fixed contact 23 for the ground switchgear and closes the disconnecting switch DSo or a ground switchgear ESo. Secondary of the insulated transformer GT is connected in delta and connecting conduits 13u-13w are connected through insulation spacers 12u-12w arranged at the other side of the upper section of the container 10 with respective phase cable heads CHd. By such arrangement, the size of the gas container is reduced resulting in reduction of installation floor space.

Description

Detailed Description of the Invention [Field of Industrial Application] The present invention relates to gas-insulated electrical equipment equipped with a gas-insulated switchgear and a gas-insulated compensating reactor device, and a gas-insulated compensating reactor device used in the electrical equipment. It is.

[Prior Art] In electrical equipment such as substations that are connected to long cables, compensating reactors are installed in both transformers and gas-insulated switchgears.

Compensation reactor device GC is J: sea urchin, 1 shown in FIG.
A grounding transformer GT has a star connection on the next side and a triangular connection on the secondary side, a disconnector DSo has one end connected to the neutral point of the earthing transformer, and a disconnector DSo has one end connected between the other end of the disconnector DSo and the ground. and a compensation reactor CRe whose one end is connected to the other end of the disconnector DSo. The illustrated compensation reactor CRe is integrally equipped with a neutral point series resistor 5NGR, and is grounded through the resistor.

Recently, efforts have been made to reduce the size of substation equipment by insulating switching equipment with gas, and as a result, gas insulation has also been adopted for compensation reactor devices.

6 and 7 show the configuration of a conventional gas-insulated compensating reactor device. In this example, a grounding transformer GT and a compensating reactor CRe are arranged side by side in a plane, and the SF
[It is housed in a gas-filled container 1, and a disconnector DSo and an earthing switch ESo are arranged above the compensation reactor CRe.

Then, a container 2 welded to the side surface of one end in the width direction of the container 1
Remove the 3-phase cable heads CHd connected to the 3-phase terminals on the primary side of the earthing transformer, and connect the cables connected to these cable heads to the cable heads of gas-insulated switchgear installed at a remote location. I am trying to connect to.

[Problems to be Solved by the Invention] In the conventional gas insulated compensating reactor device GC, the grounding transformer GT and the compensating reactor CRe are arranged side by side in a plane, which increases the length of the container 1 and increases the size of the device. There was a problem in shaping it.

In addition, recently, as substation equipment has become gas insulated, it has become necessary to arrange gas insulated switchgear and gas insulated compensating reactor devices side by side on the same floor. For example, as shown in FIG. 8, a circuit breaker CBI, a disconnector DS11. DS21 and DS3 and earthing switch ESI
I, ES21 and ES31 and cable head Cl-1
dl, a gas insulated switchgear unit GIS1 including a current transformer CT1 and a potential transformer PT1, a circuit breaker CB2,
Disconnectors DS12 and DS22, and earthing switch ES21.
At a substation where ES22 and ES32, cable head CHd2, gas insulated switchgear units 1 to GIS2 equipped with current transformer CT2 and instrument transformer PT2 are installed, a compensation reactor is installed in gas insulated switchgear unit GISI. When connecting the device GC via cable C and disconnector DS3, two gas insulated switchgear units GI
It is preferable to install a compensation reactor device GC between S1 and GIS2.

However, in the conventional gas-insulated compensating reactor device,
The cable head CHd is provided at one end in the width direction of the container 1, which increases the width of the device, and the direction in which the cable is pulled out does not match the direction in which the cable is pulled out of the gas-insulated switchgear unit. If a gas insulation compensating reactor device is installed between insulated switchgear units, the installation area of the entire equipment will become considerably large, making it difficult to fully realize the benefits of downsizing by adopting gas insulation. There was a problem that it could no longer be utilized.

An object of the present invention is to provide gas-insulated electrical equipment with a reduced installation area and a gas-insulated compensating reactor device for use in the equipment.

In this specification, "electrical equipment" refers to equipment equipped with a gas insulated switchgear and a gas insulated compensating reactor device. Generally, necessary equipment such as a transformer is further connected to this electrical equipment to form a substation equipment.

[Means for Solving the Problems] The present invention provides at least one gas-insulated switchgear unit configured by housing predetermined switchgear equipment in a tank filled with an insulating gas, and a gas-insulated switchgear unit that includes: An insulating gas connects the grounding transformer to be connected, the disconnector whose one end is connected to the primary side neutral point of the earthing transformer, and the compensation reactor and earthing switch provided between the other end of the disconnector and the ground. The present invention relates to gas-insulated electrical equipment equipped with a gas-insulated compensating reactor device housed in a sealed rectangular parallelepiped container.

In the present invention, the width dimension of the container of the gas insulated compensating reactor device is set to be approximately equal to the width dimension of the container of the gas insulated switchgear units 1 to 1, and the gas insulated compensating reactor and the gas insulated switchgear units are arranged side by side. , the gas-insulated compensating reactor device and the gas-insulated switchgear unit were directly connected via a connecting pipe.

The above-mentioned 7j insulation compensation reactor device is preferably configured as follows. In other words, a grounding transformer is placed at the bottom of the container.
It is housed with its longitudinal direction aligned with the longitudinal direction of the container, and the primary terminal of the earthing transformer is led out to the side wall of the container located at one end in the longitudinal direction of the earthing transformer. The compensation reactor is arranged above the grounding transformer, and the disconnector and the grounding switch are arranged above the grounding transformer and in line with the reactor.

[Function] As described above, the gas insulated compensating reactor device and the gas insulated switchgear unit, which have approximately the same width dimensions, are arranged side by side, and the two are directly connected via a connecting conduit instead of a cable. Then, the entire equipment can be configured compactly. Furthermore, since the gas insulated compensating reactor device and the gas insulated switchgear unit can be connected without using cables, economical electrical equipment can be provided.

Furthermore, by arranging the compensation reactor above the grounding transformer inside the compensation reactor device as described above, the length of the container can be shortened compared to the conventional device in which both are placed side by side. Miniaturization can be achieved.

Furthermore, if the primary side terminal of the grounding transformer is led out from the longitudinal end of the container as described above, it is possible to increase the distance between the grounding transformer and the gas insulated switchgear when it is installed in parallel with the gas insulated switchgear. Since this is not necessary, the installation area can be reduced and the advantages of gas insulation can be utilized.

[Example 1 The present invention will be described in detail below with reference to the accompanying drawings.

1 and 2 show an example of the configuration of a gas insulated compensating reactor device used in gas insulated electrical equipment according to an embodiment of the present invention. In these figures, 10 is a rectangular parallelepiped supported on a base 11. It is a shaped metal container. A grounding transformer GT is housed within the container 10. The primary side of the transformer GT is star-connected, and the secondary side is triangularly connected. This grounding transformer GT is housed in the lower part of the container 10 with its longitudinal direction (the direction in which the three-phase windings are arranged in parallel) aligned with the longitudinal direction of the container.

Container 10 located at one longitudinal end of the grounding transformer GT
An opening 10b is formed in the side wall 10a, and an insulating spacer 12 is placed inside the opening 10b to airtightly close the opening.Insulating spacer 1
2 is provided with three-phase through conductors 12u to 12w,
Conductors 13u to 13w connected to the primary terminal of the transformer GT are connected to the ends of these through conductors located inside the container 10.

In this example, the end of the insulating spacer 12 located outside the container 10 of the through conductor 12 (' or 12w) is connected to the grounding transformer.
This is the lead-out part for the next terminal.

A branch pipe portion 14a protruding from the side surface of the cylindrical cable head container 14 is airtightly connected to the outside of the opening 10b of the container 10. The upper and lower ends of the container 14 are hermetically closed by cover plates 15 and 16, respectively, and three-phase cable heads CH arranged in a triangular manner are attached to the lower cover plate 16.
d is attached. Connection conductors 17u and 17v are connected to the terminals of the cable head CHd for the U, V, and W three phases, respectively.

17w is connected, and the other ends of these connecting conductors are the through conductors 12u and 12v of the insulating spacer 12.

It is connected to the outer end of 12W (the primary terminal lead-out part of the grounding transformer).

A reactor removal fitting 18 is fixed to the upper yoke of the grounding transformer GT, shifted toward the other longitudinal end of the container 1o (opposite the opening 10b). A compensation reactor CRe is fixed on top.

Since the compensation reactor CRe is arranged offset to one side in the longitudinal direction of the container 10, a space S is formed on the side of the compensation reactor.

In this embodiment, this space S is used to connect the disconnector DSo.
and an earthing switch ESo. In this embodiment, a movable contact 20 is provided which serves as the movable contact 1- of the disconnector DSO and the movable contact of the earthing switch ESo. Supported through. A fixed contact 22 for a disconnector and a fixed contact 23 for an earthing switch are arranged on both sides of the movable contact 20, and these contacts are also supported on the ceiling of the container 10 via an insulating support. The movable contact 20 has a rod-shaped contact 20a that can be displaced to both sides, and when the contact contacts the fixed contact 22, a disconnector DS is activated.
The earthing switch ESO closes as soon as the contact 23 contacts the fixed contact 23.

The movable contact 20 is connected to the non-grounded terminal of the compensation reactor CRe via the connecting conductor 24, and the fixed contact 22 of the disconnector DSO is connected to the neutral point of the grounding transformer GT via the connecting conductor 25. Further, the fixed contact 23 of the grounding switch is connected to a ground potential section via a grounding wire (not shown).

SF6 gas is sealed in the container 10 at a predetermined pressure.

The cable head CHd is connected to a main circuit of a gas insulated switchgear connected to a railway line via a cable (not shown).

As mentioned above, connect the compensation reactor CRe to the grounding transformer GT
When placed above the container 10, the length of the container 10 can be shortened. Furthermore, if the primary terminal of the grounding transformer is led out to one end in the longitudinal direction of the container 10 as described above, the width dimension of the container can be reduced, which also reduces the length of the container. This allows the device to be made smaller.

Furthermore, if the primary terminal of the grounding transformer is led out to one end in the longitudinal direction of the container 10 as described above, there is no need to secure space for routing the cable on the side of the container. There is no need to provide a large space between the gas insulated switchgear and the gas insulated switchgear. Therefore, together with the ability to downsize the device, it is possible to contribute to downsizing of the substation equipment, and to take advantage of the advantages of using gas insulation.

Figures 3 and 4 show two gas insulated switchgear units G■S1 and GI, as shown in the single line diagram in Figure 8.
This figure shows gas-insulated electrical equipment configured by arranging S2 and the compensation reactor device of the present invention on the same floor.

In this embodiment, gas insulated switchgear units GIS1 and GIS2, which are constructed by housing each device shown in FIG. 8 in a predetermined container and gas insulated, are arranged side by side at a predetermined interval. Bus line BUS between switchgear units
have been contacted through. Although not shown, bus line BU
S extends further on both sides of the gas insulated switchgear GIS1 and G1S2, and is connected to the transformer etc. through the gas insulated switchgear, and is connected to the transformer equipment etc. as shown in Figures 3 and 4. Electrical equipment constitutes substation equipment.

The gas insulated compensating reactor device GO according to the present invention is arranged between the gas insulated switchgear units GIS1 and GIS2. In this way, when the compensating reactor device of the present invention is arranged side by side with a gas insulated switchgear unit to form a gas insulated electrical equipment, the width dimension of the container 10 is set to be approximately equal to the width dimension of the gas insulated switchgear unit. By setting the dimensions in this manner, the appearance of the electrical equipment can be made to have a well-balanced appearance.

In this embodiment, instead of the cable head being attached to the container 14 of the embodiment shown in FIGS. 1 and 2, a cruciform container 30 is connected to the lower end of the container 14, and the container 30 is One end of the conduit is connected via a flexible tube 31 to a compensating reactor connection portion 32 of the gas insulated switchgear unit GIS1. A disconnector DS3 shown in FIG. 8 is housed in the container 30, and the connection conductor in the container 14 connected to the through conductor of the insulating spacer 12
It is connected to the main circuit of the Cas-insulated switchgear unit hGI Sl via. The container 30 is supported on a pedestal 33. The container 14, the container 30, etc., and the flexible tube 31 constitute a connecting pipe line that connects the compensating reactor device GC and the gas insulated switchgear unit.

As shown in FIG. 3, when the gas insulated compensating reactor device according to the present invention is arranged side by side with the gas insulated switchgear]-Nitsu 1~, if the rated capacity of the compensating reactor is further increased, the container 10 Deal with this by increasing the length. In this case, the compensation reactor connection portion of the gas insulated switchgear unit ~GIS1 is led out to its longitudinal end (lower end in FIG. 3).

As mentioned above, the compensating reactor device of the present invention may be connected to the gas insulated switchgear unit by a cable as in the embodiment shown in FIGS. This can also be done using a connecting pipe as in the embodiments shown in FIGS. If the connection with the gas insulated switchgear unit 1~ is made in this way by a connecting pipe, it is economical because no cable is used, and the device can be provided in harmony with the gas insulated switchgear unit 1~. can.

In the above embodiment, the lead-out part of the primary side terminal of the grounding transformer was constructed with one insulating spacer and two insulating spaces, but the bushing terminal can be taken out by penetrating the side wall at one longitudinal end of the container 10.
Alternatively, the bushing terminal may be used as a lead-out portion of the primary terminal of the grounding transformer to connect to an external circuit.

[Effects of the Invention] As described above, according to the present invention, a gas insulated compensating reactor device and a gas insulated switchgear unit, which have approximately the same width dimensions, are arranged side by side, and a connecting pipe is formed between the two without using a cable. Since they are directly connected via a road, there is an advantage that the entire facility can be configured compactly. Furthermore, since the gas insulated compensating reactor device and the gas insulated switchgear unit can be connected without using cables, economical electrical equipment can be provided.

Furthermore, in the gas-insulated compensating reactor device of the present invention, the length of the container is shortened by arranging the compensating reactor above the grounding transformer, and the primary terminal of the grounding transformer is placed at one end in the longitudinal direction of the container. Since the width of the container is reduced by leading out the container, there is an advantage that the device can be made more compact.

Furthermore, in the gas insulated compensating reactor device of the present invention, the primary terminal of the grounding transformer is led out to one end in the longitudinal direction of the container. Since there is no need to take a large space between the equipment and the equipment, it is possible to downsize the equipment, and together with this, it is possible to contribute to the downsizing of the substation equipment. can take advantage of the advantages of

[Brief Description of the Drawings] Fig. 1 is a sectional view of an embodiment of the present invention taken along a horizontal plane and viewed from above, and Fig. 2 is a sectional view of the embodiment viewed from the front along a vertical plane. 3 and 4
The figures are respectively a plan view and a front view showing other embodiments of the present invention, FIG. 5 is a wiring diagram showing the electrical configuration of the compensation reactor device according to the embodiment of the present invention, and FIGS. 6 and 7 are respectively conventional FIG. 8 is a plan view and a front view showing the gas-insulated compensating reactor device of the present invention, and FIG. 8 is a single line diagram showing the configuration of the main part of the substation equipment in which the compensating reactor device of the present invention is installed. 10... Container, 12... Insulating spacer, 13u to 13w... Connection conductor, GT... Grounding transformer, DS
O...Disconnector, ESo...Earth switch, CRe...
・Compensation reactor, GC...Gas insulation compensation reactor device.

Claims (2)

[Claims] (1) At least one gas-insulated switchgear unit configured by housing predetermined switchgear equipment in a tank filled with insulating gas, a grounding transformer connected to the gas-insulated switchgear unit, and the grounding transformer. A disconnector whose one end is connected to the primary neutral point of the device, a compensating reactor and a grounding switch provided between the other end of the disconnector and the ground are housed in a rectangular parallelepiped container filled with insulating gas. In a gas insulated electrical equipment comprising a gas insulated compensating reactor device, the width dimension of the container of the gas insulated compensating reactor device is set to be approximately equal to the width dimension of the container of the gas insulated switchgear unit. 1. A gas insulated electrical equipment characterized in that a compensating reactor and a gas insulated switchgear unit are arranged side by side, and the gas insulated compensating reactor and the gas insulated switchgear unit are directly connected via a connecting pipe. (2) Insulate the earthing transformer, the disconnector whose one end is connected to the primary neutral point of the earthing transformer, and the compensation reactor and earthing switch provided between the other end of the disconnector and the ground. In a gas insulation compensating reactor device housed in a rectangular parallelepiped container filled with gas, the grounding transformer is housed in a lower part of the container with its longitudinal direction aligned with the longitudinal direction of the container. , a primary side terminal of the grounding transformer is led out to a side wall of the container located at one end in the longitudinal direction of the grounding transformer, the compensation reactor is disposed above the grounding transformer, and the disconnector and the grounding A gas insulated compensating reactor device, characterized in that a switch is arranged above the grounding transformer and in parallel with the reactor.