JPH08138953A - Transformer structure and transformer system - Google Patents

Abstract

PURPOSE: To enable a transformer installed inside a cubicle to be lessened in floor space occupied by it and prevented from generating vibratory noises and heat. CONSTITUTION: A transformer structure 12 is formed through such a manner that a molded single-phase transformer molded with molding material, a current transformer connected to the primary winding of the single-phase transformer, and an instrument transformer are molded into one piece with molding material. The transformer structure 12 is positioned and fixed inside a rectangular frame 14. The two frames 14 are stacked up vertically and connected together for the formation of a transformer system 16, and the transformer system 16 is arranged in a cubicle 10. The molded transformer is so arranged inside the frame 14 as to keep the center axis of the transformer winding horizontal.

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. 9 is a circuit diagram of a transformer system that has been generally used in the past to transform three phases and a single phase, and includes a plurality of circuit breakers VCB and a switch PC.
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.

Therefore, one proposal for dealing with the above-mentioned various problems has been filed by the applicant of the present invention as an invention "transformer structure and substation equipment" (Japanese Patent Application No. 6-60264). In the transformer structure according to the previous application, as shown in FIG. 7, a mold transformer 2 obtained by molding a transformer with a molding material 1 made of an insulating material such as synthetic resin or synthetic rubber is positioned and fixed inside the frame body 3. At the same time, a plurality of frame bodies 3 are configured to be vertically stacked. With this structure, there is no risk of oil leakage and a fire at the time of tipping over like a conventional oil-filled transformer, which is extremely safe. Moreover, by stacking a plurality of transformers in the vertical direction, the installation area can be made extremely small.

In the above-mentioned transformer structure, when the mold transformer 2 is fixed inside the frame body 3, the central axis P of the winding wire 4 in the transformer Tr is vertical as shown in FIG. Therefore, when a plurality of frame bodies 3 are stacked, the magnetic force lines (indicated by the chain double-dashed lines) from the mold transformers 2, 2 located above and below interfere with each other as shown in FIG. 7, and the frame bodies 3 vibrate. As a result, noise and heat are generated.

[0007]

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. It is an object of the present invention to provide a transformer structure and a substation facility that can reduce vibration and noise generation while achieving downsizing.

[0008]

In order to achieve the above object, a transformer structure according to the present invention comprises a transformer for power distribution molded by an insulating material such as synthetic resin or synthetic rubber, and the molded transformer is The transformer is positioned and fixed inside the frame body in a posture in which the central axis of the winding is horizontal, and the plurality of frame bodies provided with the mold transformer are vertically stacked and the plurality of transformers are connected to each other. Characterize.

To achieve the above object, a transformer structure according to another invention of the present application is a single-phase transformer for power distribution,
Molded with an insulating material such as synthetic resin or synthetic rubber, the molded transformer is positioned and fixed inside the frame body in a posture in which the center axis of the winding of the transformer is horizontal,
A plurality of frame bodies provided with the mold transformers are vertically stacked, and a plurality of single-phase transformers are connected to each other by V-V wiring.

In order to achieve the above 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 constructed by integrally molding a current transformer and an instrument transformer with an insulating material such as synthetic resin or synthetic rubber, and the transformer structure is constructed such that the center axis of the winding of the transformer is horizontal. And a plurality of the frame bodies are stacked in the vertical direction, and the transformers of the transformer structure provided in each frame body are connected to each other. It is characterized by being placed in a cubicle.

[0011]

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 is a schematic configuration diagram of a substation facility adopting a transformer structure according to an embodiment, which is a cubicle 10.
Inside, a substation device 16 configured by vertically stacking and connecting two frame bodies 14, 14 each having a transformer structure 12 is arranged. As shown in the drawing, the frame body 14 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.

The transformer structure 12 comprises a single-phase transformer Tr for power distribution, a current transformer CT, and a transformer PT for instruments.
Which are connected to each other. That is, as shown in FIG. 2, the single-phase transformer Tr is molded with the molding material 26 made of an insulating material to form the mold transformer 23, and the 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 all 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 with the molding material 28 has an extremely safe structure, unlike the conventional oil-filled transformer, in which there is no risk of oil leakage and a fire. . 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.

As shown in FIG. 3, the mold transformer 23 is arranged inside the frame body 14 in such a manner that the central axis P of the winding wire 30 constituting the transformer Tr is horizontal.
As a result, as shown in FIG. 1, the transformer structure 12, 1
It is possible to prevent the lines of magnetic force (indicated by a chain double-dashed line) generated from the upper and lower mold transformers 23, 23 from interfering with each other in a state where the two are stacked. Therefore, it is possible to prevent the generation of vibration noise and heat caused by the interference of the lines of magnetic force.

An ammeter A connected to the current transformer CT and a 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. 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. 2, 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 FIG. 1, reference numeral 32 denotes an air blower such as a sirocco fan arranged in the cubicle 10. By introducing external air into the cubicle 10 by the air blower 32, an air cooling action can be performed. Has become. Also cubicle 10
An exhaust portion (not shown) for internal air is formed on the side portion of the. The blower 32 may be arranged in the frame body 14 in which the transformer structure 12 is arranged, and the blower 32 may blow air directly onto the transformer structure 12. Further, a pair of blowers 32 is arranged on both sides (left, right, up, down, front and rear) sandwiching the transformer structure 12, and air is blown from one blower 32 to the transformer structure 12 while the other blower 32 is used. By setting the air suction, it is possible to improve the cooling efficiency.

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. Further, in the state where the transformer structures 12 are stacked, it is possible to prevent the magnetic force lines generated from the upper and lower mold transformers 23 from interfering with each other, and to prevent the generation of vibration noise and heat caused by the interference of the magnetic force lines. .

The plurality of transformer structures 12, 12 are
Since the frame bodies 14 and 14 are connected only by fixing them to each other, for example, in the substation 16 in which a transformer Tr of 200 KVA on the upper side and 300 KVA on the lower side is arranged, for example, a transformer T of 300 KVA on the upper side and 500 KVA on the lower side is used.
It can be easily and quickly recombined into the one of r, and the construction period and cost can be reduced. Moreover, since the durability life of the current transformer CT and the transformer PT for an instrument can be improved, there is almost no need for maintenance and inspection, and workability is troublesome even if they are stacked vertically. There is no such thing. Therefore, repair parts and the like are almost unnecessary and the running cost can be reduced. Further, since the high voltage portion is not exposed inside the cubicle 10, the substation 1
Even when an operator enters the inside of the cubicle 10 at the time of cleaning or maintenance / inspection work of each device constituting 6, the work can be safely performed. Further, since the transformer structures 12 and 12 are easily assembled, the single-phase transformers T having different capacities are
By changing the transformer structure 12 provided with r, the capacity of the entire device can be easily changed. 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. Furthermore, since the high-pressure portion is entirely molded with the molding material 28, it is possible to omit the cubicle 10 and directly install the transformer structure 12 itself.

It should be noted that, in the embodiment, a two-phase
The case of stacking the base transformer structure has been described,
For example, as shown in FIG. 6, three transformer structures 12 each including a single-phase transformer may be stacked. Furthermore, it is also possible to stack four or more transformer structures. In addition, a three-phase transformer is disposed in a transformer structure and stacked, or a transformer structure including a single-phase transformer is used.
You may laminate | stack by combining with the transformer structure provided with the phase transformer. It is also possible to integrally mold an AVR (automatic voltage regulator), LRD, WW, or the like inside the transformer structure.

[0021]

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. Moreover, since the central axes of the windings constituting the transformer are arranged horizontally, it is possible to prevent the interference of magnetic force lines generated from the upper and lower mold transformers, and preferably to prevent the generation of vibration noise and heat caused by the interference of magnetic force lines. You can That is, it is extremely effective especially for installing substation equipment using a high-voltage transformer.

Further, since the assembly can be performed only by 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. Furthermore, since the transformer is molded with an insulating material, it is possible to effectively prevent the occurrence of electric shock in the cubicle, and it is possible to safely perform cleaning and maintenance inspection work.

[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 an explanatory diagram showing a schematic structure of a substation apparatus according to an embodiment.

FIG. 3 is an explanatory diagram showing an internal structure of the mold transformer according to the 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 front view showing a schematic configuration of substation equipment adopting a transformer structure according to another embodiment.

FIG. 7 is a front view showing a schematic configuration of substation equipment adopting a transformer structure according to the applicant's earlier application.

8 is an explanatory diagram showing an internal structure of the mold transformer shown in FIG. 7. FIG.

FIG. 9 is a circuit diagram of a transformer system according to the related art.

[Explanation of symbols]

 10 cubicle 12 transformer structure 14 frame body 16 transformer device 23 mold transformer 26 mold material 28 mold material 30 winding Tr transformer CT current transformer PT instrument transformer VCB circuit breaker P center axis

Continuation of the front page (51) Int.Cl. ⁶ Identification code Office reference number FI technical display location 9375-5E H01F 33/00 Z H02B 5/04 Z

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 wound on the winding (30) of the transformer (Tr). The frame body (14) with its central axis (P) horizontal
A plurality of frame bodies (14, 14), which are positioned and fixed inside, and 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 with an insulating material (26) such as synthetic resin or synthetic rubber, and the molded transformer (23) is wound in the transformer (Tr). The frame body (14) with the central axis (P) of 30) horizontal.
A plurality of frame bodies (14, 14), which are positioned and fixed inside, and equipped 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 windings (30) in the transformer (Tr) are arranged inside the frame body (14) with the central axis (P) of the winding (30) horizontal, and the frame bodies (14) are laminated in the vertical direction. , Each frame (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.