JPH0993733A - Transformation facility for power distribution - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a transformer facility for power distribution which can lessen the installation area and is short in installation time. SOLUTION: This transformer facility comprises a transformer 12 for power distribution housed in a first tank, a plurality of gas breakers 14 which are housed in the second tank arranged at roughly parallel with the sidewall of the first tank and the lead parts on the side of which are directly coupled with the transformer for power distribution through oil gas bushings or insulating spacers, and gas bushings 21 which electrically connect the lead parts on the other side of the gas breakers to the power line, severally.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to distribution substation equipment having an improved connection configuration between a distribution transformer and a gas circuit breaker.

[0002]

2. Description of the Related Art FIG. 9 (a) is a top view showing a connection relationship between a transformer and a gas circuit breaker of a conventional distribution facility, FIG. 9 (b).
FIG. Further, FIG. 10 is a single-phase connection diagram of the distribution substation equipment.

As shown in FIG. 1, an oil-immersed paper capacitor bushing 4 is attached to an oil-filled three-phase transformer 2 on which a conservator 1 is mounted via a connecting portion 3. The lead-out parts of the respective phases drawn out from the oil-impregnated paper condenser bushing 4 are connected to the overhead wires 6 supported by the support insulators 5, respectively.
Is connected to the current transformer 9 of the gas circuit breaker 7.

Therefore, for each oil-filled three-phase transformer 2, there are six gas bushings 8 for the gas circuit breaker 7 and three oil-filled three.
Oil-impregnated paper condenser bushing 4 used for phase transformer 2
Will be required.

[0005]

Therefore, it is necessary to ensure a sufficient air insulation distance between the ground and the phases, and a support for insulating and supporting the overhead wire 6 connecting the oil-filled three-phase transformer 2 and the gas circuit breaker 7. There is a problem that the installation area of the distribution substation equipment becomes large due to the necessity of the installation space for the insulator 5.

Further, in the case of the distribution substation equipment having such a configuration, the oil-filled three-phase transformer 2 and the gas circuit breaker 7 are separately installed for the purpose of ensuring safety and the test adjustment is performed. Therefore, each installation work period and test period are extended. Further, since both installations were connected by the overhead line 6 after the installation test was completed, there was a problem that the total installation work period would be prolonged.

The present invention has been made in view of the above circumstances, and an object of the present invention is to provide a distribution substation facility which can reduce the installation area and can be installed in a short time.

[0008]

Therefore, first, in order to achieve the above-mentioned object, the invention according to claim 1 is a distribution transformer housed in a first tank, and a first distribution transformer.
A plurality of gas circuit breakers that are housed in a second tank that is arranged substantially parallel to the tank side wall and one of which is directly connected to the distribution transformer, and the other of the gas circuit breakers. And a gas bushing for electrically connecting each of them to a power system.

According to a second aspect of the present invention, in the distribution substation facility according to the first aspect, the gas bushing is
It is characterized in that it is attached to a wall surface of the second tank orthogonal to the longitudinal direction of the second tank.

Furthermore, the invention according to claim 3 is characterized in that each of the gas bushings is arranged so that the arrangement of the surfaces on the electric power system side, which are substantially orthogonal to the longitudinal direction of the gas bushings, is fan-shaped. And

Further, the invention according to claim 4 is characterized in that a cable head is added to the lead-out portion of the gas bushing on the electric power system side. The invention according to claim 1 is
Since the distribution transformer and the gas circuit breaker are directly connected, it is not necessary to install them separately, and the installation period can be reduced.

According to the second aspect of the present invention, since the gas bushing is attached to the wall surface of the second tank which is orthogonal to the longitudinal direction of the second tank, the attachment branch portion can have a simplified structure. .

According to the third aspect of the present invention, the gas bushings are arranged so that the arrangement of the surfaces on the electric power system side, which is substantially orthogonal to the longitudinal direction of the gas bushings, is fan-shaped, so that the interphase insulation distance is secured. be able to.

In the invention according to claim 4, since the cable head is added to the lead-out portion of the gas bushing on the electric power system side, the transformer and the gas circuit breaker can be grounded at a location apart from the electric power system. As a result, the degree of freedom in layout can be improved.

[0015]

BEST MODE FOR CARRYING OUT THE INVENTION Hereinafter, a distribution substation facility according to an embodiment of the present invention will be described with reference to the drawings. <First Embodiment> Fig. 1 (a) is a side view of a distribution substation equipment according to a first embodiment of the present invention, Fig. 1 (b).
[Fig. 3] is a front view of the distribution substation equipment according to the embodiment (an embodiment corresponding to the invention of claim 1).

As shown in FIG. 1, in the distribution substation equipment according to the present embodiment, the oil-immersed transformer 12 on which the conservator 11 is mounted has a lead-out portion for each phase which is connected to a single-phase gas by a connecting portion 13. It is directly connected to the circuit breaker 14.

Specifically, the single-phase gas circuit breaker 14 is arranged so that the longitudinal direction of the tank of the single-phase gas circuit breaker 14 is substantially parallel to the side wall of the oil-filled transformer 12 which is orthogonal to the ground. Is located in.

The oil-gas bushing or the epoxy insulating spacer of the connecting portion 13 directly connects one of the lead-out portions of the oil-filled transformer 12 and the single-phase gas circuit breaker 14.

The portion of the single-phase gas circuit breaker 14 directly connected to the corresponding phase of the oil-filled transformer 12 is grounded by the grounding switch 14a of the single-phase gas circuit breaker 14 as shown in FIG. ing.

The single-phase gas circuit breaker 14 includes a ground switch 1
A grounding switch operating mechanism 15 for operating 4a is attached, and this grounding switch operating mechanism 15 operates a grounding switch three-phase one-way operating link 16 to
It is configured to operate the grounding switch of each phase. Also,
The gas circuit breaker operating mechanism 17 operates the gas circuit breaker of each phase by operating the gas circuit breaker three-phase active link 19 on the support frame 18.

The other lead-out portion of the single-phase gas circuit breaker 14 is led out by the gas bushing 21 via the current transformer 20 and connected to the main circuit terminals 22, respectively. Then, it is connected to the overhead wire 23 via the main circuit terminal 22.

Therefore, according to the substation facility for distribution according to the present embodiment, since the oil-filled transformer 12 and the single-phase gas circuit breaker 14 are directly connected, they can be collectively transported by a trailer or the like. .

Further, since the oil-filled transformer 12 and the single-phase type gas circuit breaker 14 are directly connected, it is not necessary to install them separately, and the installation period can be shortened. Further, a connecting overhead wire connecting the oil-filled transformer 12 and the single-phase gas circuit breaker 14, a support insulator for supporting the overhead wire, a gas bushing of the single-phase gas breaker 14, an oil paper of the oil-filled transformer 12. Since the input capacitor bushing can be eliminated or reduced, the installation area can be reduced and the reliability of the air insulation and the economical efficiency of the power distribution substation equipment can be improved. <Second Embodiment> Fig. 3 (a) is a side view of a distribution substation equipment according to a second embodiment of the present invention, and Fig. 3 (b) is a distribution substation equipment according to the same embodiment. 3 is a front view of the embodiment (an embodiment corresponding to the invention of claim 2). Note that FIG. 1 (a)
The same parts as those in FIG. 1B are designated by the same reference numerals, and the description thereof will be omitted. Here, only different parts will be described.

That is, the difference between the distribution substation equipment according to the present embodiment and the distribution substation equipment according to the first embodiment described above is that the single-phase gas circuit breaker with a ground switch 14 is connected to an oil-filled transformer. The tank 12 of the single-phase gas circuit breaker 14 with a grounding switch is arranged so that the longitudinal direction of the tank is inclined with respect to the side wall of the tank 12 in the direction orthogonal to the ground.

Then, one of the lead-out portions of the single-phase gas circuit breaker 14 with a grounding switch is constructed so as to be pulled out as it is in the longitudinal direction of the tank of the single-phase gas circuit breaker 14 with a grounding switch by means of the gas bushing 21. There is.

Therefore, according to the distribution substation equipment according to the present embodiment, it is possible to simplify the branching portion for mounting the gas bushing 21 to the tank of the single-phase gas circuit breaker 14 with a ground switch. . <Third Embodiment> Next, a configuration of a distribution substation equipment according to a third embodiment of the present invention will be described (an embodiment corresponding to the invention of claim 3).

FIG. 4 (a) is a side view of the distribution substation equipment according to the third embodiment of the present invention, and FIG. 4 (b) is a front view of the distribution substation equipment of the same embodiment. . In addition,
The same parts as those in FIGS. 1A and 1B are denoted by the same reference numerals, and the description thereof will be omitted. Here, only different parts will be described.

That is, the feature of the distribution substation equipment according to the present embodiment is that the interphase insulation distance between the main circuit terminals, which are the charging parts of the gas bushing 21, is secured by arranging the gas bushing 21 in a fan shape. , Single-phase gas circuit breaker 1
4. Shorten the connection of the three-phase active link 16 of the earthing switch 14a and the three-phase active link 19 of the gas circuit breaker,
The object is to reduce the dimension in the interphase direction required for connection with the oil-filled transformer 2.

5 (a) and 5 (b) are diagrams showing a configuration in which the gas bushings 21 of the distribution substation equipment according to the above-mentioned second embodiment are arranged in a fan shape. <Fourth Embodiment> FIGS. 6 (a) and 6 (b) are diagrams showing the configuration of a distribution substation equipment according to a fourth embodiment of the present invention (the invention of claim 4). Corresponding embodiment). The same parts as those in FIGS. 1A and 1B are designated by the same reference numerals, and the description thereof will be omitted. Here, only different parts will be described.

That is, the features of the distribution substation equipment according to the present embodiment are that the oil-filled transformer 12 and the gas circuit breaker 14 with a ground switch (the attached ground switch is the oil-filled transformer 12 and the gas circuit breaker). 14)), and one of the lead-out portions of the gas circuit breaker 14 with a grounding switch is pulled out by a power cable 34 via a cable head (cable end connection box) 31. .

Through the cable head 31, the drawn power cable 34 is connected to the main busbar and other gas-insulated switchgear. In the figure, 33 is a cable head mount for supporting the power cable 34, and 32 is a split type current transformer for measuring the current flowing through the power cable 34.

Therefore, according to the distribution substation equipment according to the present embodiment, the charging section is sealed and safety is ensured, and it can be installed in a place away from the power system line, and the degree of freedom in layout is high. Can be improved. Further, it becomes possible to provide the power cable 34 with the split type (the iron core can be split and assembled) current transformer 32.

In the figure, a switch may be arranged between the gas circuit breaker 14 and the cable head 31. <Fifth Embodiment> Next, a distribution substation equipment according to a fifth embodiment of the present invention will be described.

FIG. 7 (a) is a side view of the distribution substation equipment according to the fifth embodiment of the present invention, and FIG. 7 (b) is a front view of the distribution substation equipment according to the embodiment. is there. Further, FIG. 7C is a single-phase connection diagram of the distribution substation equipment in the same embodiment. The same parts as those in FIG. 1 are designated by the same reference numerals, and the description thereof will be omitted. Here, only different parts will be described.

As shown in the figure, in the distribution substation equipment according to the present embodiment, the lead-out portions for each phase of the gas-insulated transformer 41 are connected to the single-phase type gas circuit breaker 42 by the connecting portions 13, respectively.
It is directly connected to.

As shown in FIG. 7 (c), the single-phase gas circuit breaker 42 is equipped with grounding switches 42a, 42b and a disconnector 42c, and is placed in a direction substantially perpendicular to the ground through the current transformer 20. It is connected to the gas bushing 21 arranged at.

The single-phase gas circuit breaker 42 is connected to the disconnector 4 via a link mechanism 52 and an operation link mechanism 53.
2c, an earthing switch 42a, 42b, an operating mechanism 51 for operating the circuit breaker 42d, and a lightning arrester 54 are attached.

The single-phase gas circuit breaker 42, the ground switches 42a and 42b, the circuit breaker 42d, the lightning arrester 54, etc. are integrated so as to have the same gas division and the same gas pressure. That is, the features of the distribution substation equipment according to the present embodiment are that the single-phase gas circuit breaker 42, the disconnector 42c, and the earthing switch 42.
a, 42b, the lightning arrester 54, the current transformer 20, etc. are integrated so as to have the same gas division and the same gas pressure.
Is drawn in a substantially vertical direction so that it can be directly drawn into the power system.

8 (a) to 8 (c), as described in the above-mentioned third embodiment, in the distribution substation facility in which the gas bushings 8 are arranged in a fan shape, the single-phase gas is used. The circuit breaker 42, the ground switches 42a and 42b, the circuit breaker 42d, the lightning arrester 54, etc. are integrated so that the same gas division and the same gas pressure are obtained.

Further, in the above-described embodiment, the configuration in which the current transformer 20 is installed in the insulating gas (SF6 gas) has been described, but the current transformer 20 may be packaged without being installed in the insulating gas.

Therefore, the distribution substation equipment according to the present embodiment can also obtain the same effects as those of the distribution substation equipment described in the first embodiment. In addition,
Although the gas circuit breaker has been described in the first to fifth embodiments, the vacuum circuit breaker (VCB) may be used.

[0042]

As described above in detail, according to the present invention,
The installation area can be reduced, and the distribution substation equipment can be provided with a short installation time.

[Brief description of drawings]

FIG. 1 is a diagram showing a configuration of distribution substation equipment according to a first embodiment of the present invention.

FIG. 2 is a single-phase connection diagram of the power distribution substation equipment according to the first embodiment.

FIG. 3 is a diagram showing a configuration of distribution substation equipment according to a second embodiment of the present invention.

FIG. 4 is a diagram showing a configuration of distribution substation equipment according to a third embodiment of the present invention.

FIG. 5 is a diagram showing a configuration of power distribution substation equipment according to the third embodiment.

FIG. 6 is a diagram showing a configuration of distribution substation equipment according to a fourth embodiment of the present invention.

FIG. 7 is a diagram showing a configuration of distribution substation equipment according to a fifth embodiment of the present invention.

FIG. 8 is a diagram showing another configuration of the distribution substation equipment according to the fifth embodiment.

FIG. 9 is a diagram showing a connection relationship between a transformer and a gas circuit breaker of conventional distribution equipment.

FIG. 10 is a single-phase connection diagram of a conventional distribution substation facility.

[Explanation of symbols]

11 ... Conservator, 12 ... Oil-filled transformer, 13 ... Connection part, 14 ... Single-phase gas circuit breaker, 14a ... Ground switch, 1
5 ... Grounding switch operating mechanism, 16 ... Grounding switch three-phase active link, 17 ... Gas circuit breaker operating mechanism, 18 ... Support frame, 19 ... Gas breaker three-phase active link, 20 ... Ventilator, 21 ... Gas bushing, 22 ... Main circuit terminal, 23
… Overhead wire, 31… Cable head, 32… Split type current transformer,
33 ... Cable head mount, 34 ... Power cable.

Claims (4)

[Claims] 1. A distribution transformer housed in a first tank and a second tank arranged substantially parallel to a first tank side wall of the distribution transformer, and one drawer. A plurality of gas circuit breakers, each of which is directly connected to the distribution transformer, and a gas bushing electrically connecting the other lead-out part of the gas circuit breaker to a power system. Substation equipment. 2. The substation facility for electric power distribution according to claim 1, wherein the gas bushing is attached to a wall surface of the second tank orthogonal to a longitudinal direction of the second tank. 3. The power distribution according to claim 1, wherein each of the gas bushings is arranged such that a surface of the gas bushing on a side of the electric power system that is substantially orthogonal to a longitudinal direction of the gas bushing has a fan shape. Substation equipment. 4. The distribution substation equipment according to claim 1, wherein a cable head is added to a lead-out portion of the gas bushing on the electric power system side.