JPH07245221A - Transformer structure and transformer facility - Google Patents

Abstract

PURPOSE:To reduce the installation area for a transformer inside a cubicle so as to attain miniaturization of its facility. CONSTITUTION:A transformer structure body 12 consists of a molded transformer that a single-phase transformer is molded of molding material and a current transformer and a transformer for instrument connecting with a primary side of the single transformer that are integrally molded of mold material. The body 12 is positioned and fixed inside a square frame body 14. Two bodies 14, 14 are piled up vertically and connected with each other. A transformer equipment 16 which is formed by piling up the bodies 14, 14 vertically is placed inside a cubicle 10.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a transformer structure and a substation facility in which the installation area of a transformer for power distribution arranged in a cubicle can be reduced.

[0002]

2. Description of the Related Art Inside a cubicle installed in a substation or the like, a transformer for power distribution, mainly a current transformer for current measurement, an instrument transformer for voltage measurement, a circuit breaker, etc. are arranged in a required arrangement. It is arranged so that each device is connected by a cable. It is generally known that the transformer is an oil-filled type in which an iron-made box body is filled with insulating oil, and the transformer body is immersed therein.

[0003]

When three-phase alternating current is transformed by using three single-phase transformers, the transformers are connected in a horizontal direction in parallel, so that the transformers are connected to each other. There is a problem that the installation area occupied by the transformer in the cubicle becomes large, and as a result, the cubicle itself becomes large. This is because if an oil-filled transformer is used as described above, the transformer may fall over and cause a fire in the event of a disaster such as an earthquake.
This is because the transformer could not be stacked in the vertical direction. It is also pointed out that the stacking of the transformers makes maintenance and inspection of each transformer extremely troublesome.
Furthermore, the work of connecting a current transformer, a transformer for instruments, a circuit breaker, etc. to each transformer is complicated and time-consuming, and
There was a drawback that the high pressure part was exposed in the cubicle and increased the danger.

FIG. 6 is a circuit diagram of a transformer system that has been generally used in the past to transform three-phase and single-phase, and includes a plurality of circuit breakers VCB and switch PCs.
S is required. Further, in the case of this system, there is a disadvantage that the transformer is extremely burned when the load on the secondary side becomes large.

[0005]

SUMMARY OF THE INVENTION The present invention has been made in view of the above-mentioned drawbacks inherent in the above-mentioned prior art, and has been proposed in order to solve the above-mentioned drawbacks by reducing the installation area occupied by a transformer in a cubicle. In addition, it is an object of the present invention to provide a transformer structure and substation equipment capable of achieving downsizing of equipment.

[0006]

In order to achieve the above object, the transformer structure according to the present invention has a transformer for power distribution molded by an insulating material such as synthetic resin or synthetic rubber, and the molded transformer is framed. Is positioned and fixed inside, and a plurality of frame bodies provided with the mold transformer are vertically stacked, and a plurality of transformers are connected to each other.

In order to achieve the above-mentioned object, a transformer structure according to another invention of the present application is a single-phase transformer for power distribution,
It is molded with an insulating material such as synthetic resin or synthetic rubber, and this mold transformer is positioned and fixed inside the frame body, and a plurality of frame bodies provided with the mold transformers are vertically laminated, and a plurality of single-phase transformers are formed. It is characterized in that they are mutually V-V connected.

In order to achieve the above-mentioned object, a substation equipment according to still another invention of the present application is connected to a molded transformer in which a transformer for power distribution is molded with an insulating material such as synthetic resin or synthetic rubber, and the transformer. A transformer structure is formed by integrally molding a current transformer and a transformer for an instrument with an insulating material such as synthetic resin or synthetic rubber, and the transformer structure is disposed inside a frame, It is characterized in that a plurality of bodies are stacked in the vertical direction and a transformer device obtained by connecting transformers of a transformer structure arranged in each frame body to each other is arranged in a cubicle.

[0009]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Next, a transformer structure and a substation equipment according to the present invention will be described below with reference to the accompanying drawings with reference to preferred embodiments.

FIG. 1 and FIG. 2 are schematic configuration diagrams of substation equipment adopting a transformer structure according to an embodiment. Two frame bodies 14 and 14 each having a transformer structure 12 inside a cubicle 10 are shown. A substation device 16 is formed by stacking and connecting in the vertical direction. Frame 14
As shown in the figure, the transformer structure 12 is formed in a rectangular frame shape, and the transformer structure 12 is positioned and fixed between the upper frame member 18 and the lower frame member 20. The upper frame body 14 and the lower frame body 14 are connected by bolting the lower frame member 20 and the upper frame member 18 at a plurality of points. Both side frame members 22 of the frame body 14 are configured by fixing a plurality of steel plates to each other with bolts 24, 24, and are configured to function as iron cores through which magnetic flux from the transformer structure 12 flows.

The transformer structure 12 includes a single-phase transformer Tr for power distribution, a current transformer CT, and a transformer PT for meters.
Which are connected to each other. That is, as shown in FIG. 3, the single-phase transformer Tr is molded by the molding material 26 made of an insulating material to form the mold transformer 23, and a current is changed to the primary side of the single-phase transformer Tr in the mold transformer 23. The instrument CT and the instrument transformer PT are connected. Further, the mold transformer 23, the current transformer CT, and the instrument transformer PT are wholly integrally molded with a molding material 28 made of an insulating material such as synthetic resin or synthetic rubber, and the high voltage portion thereof is exposed to the outside. Configured to not be exposed. That is, the transformer structure 12 molded by the molding material 28 has an extremely safe structure, unlike the conventional oil-filled transformer, in which there is no risk of oil leaking and a fire occurring. . As the molding materials 26 and 28, synthetic resins such as epoxy and polyester, and synthetic rubbers such as butyl rubber and ethylene / propylene rubber are preferably used.

The ammeter A connected to the current transformer CT and the voltmeter V connected to the voltage transformer PT are arranged outside the molding material 28. As the ammeter A and the voltmeter V, digital ones that can measure with a small current are used. Further, the magnetic flux emitted to the outside of the structure body 12 in which the mold transformer 23, the current transformer CT and the instrument transformer PT are integrally molded flows through the side frame members 22, 22 of the frame body 14. . It is also possible to improve the heat dissipation effect by forming through holes in the molding material 28 at positions corresponding to the current transformer CT and the instrument transformer PT.

The single-phase transformer Tr in the mold transformer 23 of the upper transformer structure 12 and the single-phase transformer Tr in the mold transformer 23 of the lower transformer structure 12 are V-V connected as shown in FIG. U,
V, W-u, v, and w are used to transform three-phase alternating current, and a single-phase alternating current is taken out from o. In the example,
A 200 KVA single-phase transformer Tr is arranged on the upper side, and a 300 KVA single-phase transformer T is arranged on the lower side.
It has a different capacity V-V connection in which r is arranged.

As shown in FIG. 3, the upper transformer structure 1
2 is a single-phase transformer T in the mold transformer 23.
Current transformer CT and meter transformer P connected to the primary side of r
A circuit breaker VCB is connected to T. Although the circuit breaker VCB is configured separately from the transformer structure 12 in the embodiment, the circuit breaker VCB may be molded integrally with the transformer structure 12. Further, as shown in the circuit diagram of FIG. 5, the transformer device 16 of the embodiment is extremely simple and can cope with the load applied to the secondary side of the transformer, so that the transformer Tr can be prevented from being burned.

In the substation equipment constructed as above, the transformer structure 12 is constructed by integrally molding the mold transformer 23, the current transformer CT and the instrument transformer PT with the molding material 28. There is no possibility of fire due to the overturning, so that a plurality of transformer structures 12, 12 can be vertically stacked. Therefore, the installation area occupied by the transformer in the cubicle 10 can be reduced, which allows the cubicle 10 to be downsized. Since the cubicle 10 can be installed both outdoors and indoors, it is possible to effectively utilize the space at the installation site by reducing the installation area. Further, since three phases and a single phase can be handled by two single-phase transformers Tr, there is an advantage that an electric wiring system can be supplied as one transformer structure 12.

The plurality of transformer structures 12, 12 are
Since the frames 14 and 14 are connected only by fixing them to each other, the assembly time can be shortened and the construction period can be shortened. Further, by molding the current transformer CT and the instrument transformer PT, the durability life thereof can be improved,
There is almost no need for maintenance and inspection, and workability is not bothered by stacking vertically. Moreover, cubicle 1
Since the high-voltage portion is not exposed in 0, it is possible to safely perform the work even when the worker enters the inside of the cubicle 10 at the time of cleaning or maintenance / inspection work of each device constituting the substation 16. Furthermore, since the transformer structures 12 and 12 can be easily assembled, by changing the transformer structure 12 in which the single-phase transformers Tr having different capacities are arranged, the capacity of the entire device can be easily changed. It is possible. Further, since the transformer Tr, the current transformer CT and the instrument transformer PT are integrated, there is also an advantage that the internal space can be effectively used.

It should be noted that, in the embodiment, 2 including a single phase transformer is used.
The case of stacking the base transformer structure has been described,
For example, three transformer structures having a single-phase transformer may be laminated. Furthermore, it is also possible to stack four or more transformer structures. Further, the three-phase transformer may be disposed in the transformer structure to be laminated, or the transformer structure having the single-phase transformer and the transformer structure having the three-phase transformer may be combined and laminated.

[0018]

As described above, according to the transformer structure and the transformer equipment of the present invention, a plurality of transformers can be vertically stacked by using the molded transformer molded with the insulating material. The installation area can be made extremely small. That is, it is extremely effective especially for installing substation equipment using a high-voltage transformer. Further, since the frame can be assembled by simply connecting the frame body provided with the transformer, the working time can be shortened. Moreover, since the transformer, the current transformer, and the transformer for the instrument are molded and integrated, it is not necessary to connect the respective parts when installing the substation in the cubicle, and the time can be further shortened. Further, it is possible to prevent deterioration and damage of the transformer, the current transformer, and the transformer for measuring instrument, improve the durable life, and reduce the running cost.

[Brief description of drawings]

FIG. 1 is a front view showing a schematic configuration of a substation facility adopting a transformer structure according to an embodiment.

FIG. 2 is a side view showing a schematic configuration of substation equipment adopting the transformer structure according to the embodiment.

FIG. 3 is an explanatory diagram showing a schematic structure of a substation apparatus according to an embodiment.

FIG. 4 is a wiring diagram of a transformer according to an embodiment.

FIG. 5 is a circuit diagram of a power transformation device according to an embodiment.

FIG. 6 is a circuit diagram of a transformer system according to the related art.

[Explanation of symbols]

 10 Cubicle 12 Transformer Structure 14 Frame 16 Transformer Device 23 Mold Transformer 26 Mold Material 28 Mold Material Tr Transformer CT Current Transformer PT Instrument Transformer VCB Circuit Breaker

Claims (4)

[Claims] 1. A power distribution transformer (Tr) is molded with an insulating material (26) such as synthetic resin or synthetic rubber, and the molded transformer (23) is positioned and fixed inside the frame body (14). A plurality of frame bodies (14, 14) equipped with the mold transformer (23)
The transformer structure is characterized in that a plurality of transformers (Tr, Tr) are connected to each other while vertically stacked. 2. A single-phase transformer (Tr) for power distribution is molded by an insulating material (26) such as synthetic resin or synthetic rubber, and the molded transformer (23) is positioned and fixed inside the frame (14). Then, a plurality of frame bodies (14, 14) provided with the mold transformer (23)
Are stacked vertically and multiple single-phase transformers (Tr, T
A transformer structure characterized in that r) is connected to each other by VV. 3. A mold transformer (23) in which a transformer (Tr) for power distribution is molded by an insulating material (26) such as synthetic resin or synthetic rubber, and a current transformer (C) connected to the transformer (Tr).
T) and the instrument transformer (PT) are integrally molded with an insulating material (28) such as synthetic resin or synthetic rubber to form a transformer structure (12). The frame body (14) is disposed inside the frame body (14), and the frame bodies (14) are laminated in the vertical direction, and each frame body (1
Substation equipment characterized in that the transformer (16) obtained by connecting the transformers (Tr) of the transformer structure (12) arranged in 4) to each other is arranged in the cubicle (10). 4. The transformer (Tr) of the transformer structure (12)
The substation equipment according to claim 3, wherein a circuit breaker (VCB) is connected to the.