JP7032288B2 - Transformer equipment - Google Patents

Description

The present invention relates to a transformer facility in which a plurality of unit transformers are stacked in multiple stages.

Patent Document 1 describes a stacked transformer in which a plurality of unit transformers using a wound iron core are vertically stacked and fixed in a container by a connecting metal fitting.

Japanese Unexamined Patent Publication No. 2012-9486

In a transformer facility in which multiple unit transformers are stacked in multiple stages in a container, the number of unit transformers increases, so the number of leader wires from windings may increase and the required wiring space may increase. .. Further, if it is a large-capacity transformer, it is possible to pass a leader wire by using a space around a coil or an iron core.

Since the stepped transformer described in Patent Document 1 is intended for cooling the upper stage transformer and is intended for a transformer having a relatively large capacity, a wiring method for a leader wire connected to a winding has been studied. do not have. That is, it is not considered that the wiring space protrudes outside the iron core and the coil when the transformers having a relatively small capacity are stacked, so that the transformer case becomes large and the installation area of the transformer increases.

An object of the present invention is to provide a multi-stage transformer equipment having a smaller installation area than the conventional one.

To give an example of the "transformer equipment" of the present invention for solving the above problems,
A transformation facility having an assembly having an iron core and a winding wound around the iron core, and a container covering the assembly, wherein a plurality of the assemblies are arranged in a multi-stage stack in the container. , The container is viewed in plan view, and the plurality of assemblies are arranged at different positions or angles.

Further, to give another example of the "transformer equipment" of the present invention,
A transformation facility having an assembly having an iron core and a winding wound around the iron core, and a container covering the assembly, wherein a plurality of the assemblies are arranged in a multi-stage stack in the container. , The wiring of the lower assembly is wired so as to pass through the winding of the upper assembly, the connection terminals for connecting the distribution wires are arranged on a plurality of surfaces of the container, and the terminals for the low voltage wires are arranged. It is characterized in that it is arranged on the upper side and the lower side of the container .

According to the present invention, it is possible to provide a multi-stage transformer equipment having a smaller installation area than the conventional one.
Issues, configurations and effects other than those described above will be clarified by the following description of the embodiments.

It is a schematic diagram of a transformer. It is a schematic diagram of a multi-stage transformer. It is a front view of the transformer equipment of Example 1. FIG. It is a top view of the transformer equipment of Example 1. FIG. It is a schematic diagram of the modification (four-tiered structure) of the transformer equipment of Example 1. FIG. It is a schematic diagram of the modification (5-stage stacking structure) of the transformer equipment of Example 1. It is a schematic diagram of another modification of the transformer equipment of Example 1. FIG. It is a front view of the transformer equipment of Example 2. FIG. FIG. 8 is a plan view of a cross section taken along the line AA of FIG. It is a front view of the transformer equipment of Example 3. FIG. It is a front view of the transformer equipment of Example 4. FIG.

Prior to the description of the embodiments of the present invention, the transformer and the multi-tiered transformer which are the premise of the present invention will be described.

FIG. 1 shows an example of a schematic diagram of a transformer. As shown in FIG. 1, the transformer has a case (container) including a tank 10 and a cover 11, and a single-phase transformer 20 having an iron core 12 and a winding 13 wound around the iron core 12 in the case. Is provided. It is desirable that the tank 10 and the cover 11 are hermetically sealed.

Further, FIG. 2 shows an example of a schematic diagram of a multi-stage transformer. As shown in FIG. 2, in the multi-stage transformer equipment, in the case having the tank 10 and the cover 11, the single-phase transformer 20 having the iron core 12 and the winding 13 has two or more stages in the vertical direction, that is, in the vertical direction. It is arranged in multiple layers. The multi-stage transformer equipment has a pedestal and a metal fitting 21 for fixing each single-phase transformer, and the metal fitting 21 is connected to the wall surface of the tank 10. FIG. 2 shows a schematic diagram in the case where single-phase transformers are stacked in three stages. In the figure, the single-phase transformer 20 is arranged as a unit transformer as a representative, but it is also possible to arrange a three-phase transformer in the case. The tank 10 may be simply referred to as a container. Further, when the tank 10 and the cover 11 are integrated, they may be collectively referred to as a container.

The transformer equipment or transformer in the present specification is represented by an oil-filled transformer having an insulating oil which is a liquid for insulating and cooling the contents in a case, and a dry transformer in which a varnish which is a resin is applied to the contents. As described above, the present invention is not limited to these, and other transformer equipment or transformers may be used. Further, the single-phase transformer 20 is referred to as an iron core-winding assembly or simply an assembly.

Hereinafter, examples of the present invention will be described with reference to FIGS. 3 to 11. In addition, in each figure for demonstrating an embodiment, the same constituent elements are given the same name and reference numeral, and the repeated description thereof will be omitted.

FIG. 3 shows a front view of a transformer facility in which a plurality of single-phase transformers of the first embodiment are stacked in multiple stages. Further, FIG. 4 shows a plan view of the transformer equipment as seen from above.

As shown in the figure, three sets of the iron core-winding assembly (single-phase transformer 20) are arranged in multiple stages in the vertical direction of FIG. 3, that is, in the vertical direction. Then, as shown in FIG. 4, the arrangement angle of each assembly is shifted by 120 degrees when viewed from the upper side of the transformer equipment.

As shown in FIG. 4, in the present embodiment, by arranging the three sets of the iron core-winding assembly at different angles when viewed from the vertical direction, the leader positions 400 to 411 of the leader wire 30 for wiring overlap. It is possible to withdraw without. In the figure, the leader positions 400 to 403 are the leader positions of the leader lines of the upper assembly, the leader positions 404 to 407 are the leader positions of the leader lines of the middle assembly, and the drawer positions 408 to 411 are the lower set. The leader positions of the three-dimensional leader lines are shown.
Although the case is not shown in the figure, the case is preferably substantially cylindrical. By making the case substantially cylindrical, it becomes easy to arrange each assembly at a different arrangement angle. By making it substantially cylindrical, the installation area can be reduced when arranging the transformer equipment. By arranging the transformer 20 on the ground side, the center of gravity approaches the ground plane and becomes stable. Further, three sets of single-phase transformers 20 are arranged in the upper part in the vertical direction, and the case is narrowed at a position lower than the side surface portion of the single-phase transformer 20, that is, the ground side where the single-phase transformer 20 is not arranged. By doing so, the ground contact area can be reduced. The cross-sectional area of the case should be larger in the portion where the single-phase transformer 20 is arranged than in the portion installed on the ground. If the portion of the cross section of the case having a small cross-sectional area is 2 m or more, it is difficult to touch the high-pressure portion, and the safety is improved. Further, if the length is 3 m or more, even if a person reaches out, it becomes more difficult to touch the high-pressure portion, and the safety is further improved. Further, by setting the maintenance window to the height around the single-phase transformer 20, it is difficult for a third party to touch it, so that the security aspect is also improved. Further, when the transformer equipment of the present invention is arranged outdoors, the access point can be protected from rain, wind, and flying objects caused by wind by arranging the access point for wireless communication in the case. Further, by installing the antenna connected to the access point on the outer wall or the outside of the case, it is possible to prevent the access point from being stolen. The outer wall or the outside of the case is collectively called the outside of the case.

According to this embodiment, when a plurality of assemblies are stacked in multiple stages in the vertical direction, it is possible to suppress the expansion of the width dimension due to the overlap of the leader lines 30 due to the increase of the leader lines 30, so that the assembly is stored. It is possible to reduce the size of the transformer and the installation area of the transformer equipment is reduced. If the multi-tiered stacks are arranged in the front view, wiring may not be possible unless the leader wires are arranged on the outside. Since the line positions do not overlap, the wiring space can be effectively used. If the case is substantially cylindrical, the installation area can be made smaller when the single-phase transformer 20 is rotated and arranged.

Further, in this embodiment, since the leader positions of the leader wires do not overlap and are made uniform, the wiring work to the electric wire connection terminal is less affected by the arrangement of the terminals, and the case is used. Since production is possible regardless of the structure or external wiring structure, it leads to stable quality.

In terms of product implementation, it is not necessary to shift by exactly 120 degrees, and in the case of three-tiered stacking, shifting by about 120 degrees is effective because it is easy to take wiring space.

Further, in this embodiment, both a single-phase transformer for single-phase alternating current and a three-phase three-winding transformer for three-phase alternating current can be supported depending on the connection method. It is also applicable to a three-phase four-winding transformer that supplies a first power supply (100V) and a second power supply (200V). It is also possible to supply different voltages depending on the use of other equipment used around the transformer equipment. For example, power can be supplied to consumer products such as wireless communication access points and electric lamps on the upper side of transformer equipment.

In this embodiment, the capacity and the number of stacks of the assembly can be changed according to the required capacity, so that the versatility is high, and the number of stacks is not limited to 3 and can be 4 or more. As a result, it is possible to realize a transformer with an arbitrary capacity by combining an iron core-winding assembly having the same capacity without using a transformer with a different capacity for each transformer. Then, by mass-producing a predetermined iron core-winding assembly, the quality can be more stable, and the reliability of the transformer equipment or the entire transformer can be improved.

As a modification of this embodiment, an external view in the case of 4-tier stacking is shown in FIG. 5, and an external view in the case of 5-tier stacking is shown in FIG. In each figure, (a) shows a front view of the transformer equipment, and (b) shows a plan view of the transformer equipment seen from above. From each figure, in order to arrange the drawer positions by shifting them by substantially the same angle, assuming that the number of stacking stages of the single-phase transformers is n, a plurality of single-phase transformers are 180 / n degrees or 180 / n degrees with each other. It suffices if they are arranged so as to be offset by + -180 degrees.

Further, as another modification, FIG. 7 shows an external view of a transformer facility in which the arrangement angles are disproportionately shifted in a three-tiered stack. In the modified example of the figure, a plurality of single-phase transformers are arranged so as to be offset by substantially equal angles from each other in a part of the angle range. When the leader wire on the primary side is provided on one side of the single-phase transformer and the leader wire on the secondary side is provided on the other side, the leader wire on the primary side and 2 are provided as shown in FIG. Wiring can be facilitated by arranging the leader wires on the next side together. In this embodiment, it is not necessary to uniformly shift the arrangement angle of the single-phase transformer, and it is possible to shift the arrangement angle to an arbitrary angle to bias the wiring space to an arbitrary position.

Further, in the first embodiment, the multi-stage stacked single-phase transformers are arranged at different angles, but the multi-stage stacked single-phase transformers may be arranged at different positions. For example, by arranging the single-phase transformers stacked in multiple stages at different positions on a straight line, it is possible to prevent the leader lines from overlapping with each other.

FIG. 8 shows a front view of a transformer facility in which a plurality of single-phase transformers are stacked in multiple stages according to the second embodiment of the present invention. Further, FIG. 9 shows a plan view of the cross section taken along the line AA of FIG.

In this embodiment, when the three sets of the iron core-winding assembly 20 have a multi-tiered structure in the vertical direction, the leader wire 30 of each assembly is wired in the gap of the upper winding 13. As shown in FIG. 9, a split chopstick-shaped rod duct 50 is inserted in the winding 13 in order to secure an oil passage through which the insulating oil for cooling the winding passes. The leader wire 30 is wired from the lower part to the upper part of the upper winding 13 through a gap formed by a split chopstick-shaped rod duct 50.

According to this embodiment, it is not necessary to avoid the upper winding when wiring the leader wire 30, and it is possible to suppress the expansion of the width dimension due to the leader wire 30, so that the case can be miniaturized and the installation area is reduced. Ru.

Further, when the leader wire 30 is drawn out, wiring can be performed by drawing out the leader wire vertically, so that the number of processes such as bending can be reduced. Wiring workability is improved. Quality improvement and stability are expected. As a result, the reliability of the transformer equipment or transformer can be improved.

Further, in this embodiment, as shown in FIG. 9, since the leader wire 30 also serves as the rod duct 50, it is expected that the cooling effect will be improved by improving the convection property of the insulating oil. Further, when winding the upper winding 13, the oil passage can be secured by sandwiching the leader wire 30 instead of the rod duct 50.

FIG. 10 shows a front view of a transformer facility in which a plurality of single-phase transformers are stacked in multiple stages according to the third embodiment.

In this embodiment, a relay plate 60 for wiring and a connection terminal 61 for connecting the leader wire 30 and the relay plate 60 of each assembly are used for the low voltage side wiring.

In FIG. 10, as an example, the relay plate 60 is passed through the gap due to the rod duct 50 in the winding 13 of each vertically stacked assembly. Then, the leader line 30 is connected to the relay plate 60 by using the connection terminal 61.

According to this embodiment, since it is not necessary to extend the leader wire 30 of each assembly to the wiring connection portion, it is possible to suppress the expansion of the width dimension due to the overlap of the leader wires 30 and to reduce the size of the case. The installation area is reduced.

Further, by reducing the number of bending and stretching processes of the leader wire, the wiring workability is improved, the quality is expected to be improved and the stability is expected, and the reliability of the transformer equipment or the transformer can be improved.

In this embodiment, a structure that does not allow a gap due to the rod duct 50 in the upper winding 13 to pass through is applicable, and the relay plate does not have to be a single plate and is divided. Is also good. The relay plate may be attached to the winding by incorporating the relay plate at the time of manufacturing the winding or by inserting the relay plate after manufacturing the winding. Further, the relay plate does not need to be provided in the winding, and may be provided on the surface of the winding, and the winding of the upper assembly may be provided with a relay means for the lower leader line.

FIG. 11 shows a front view of a transformer facility in which a plurality of single-phase transformers are stacked in multiple stages according to the fourth embodiment. In this embodiment, the connection terminals of the distribution electric wires are arranged on a plurality of surfaces of the case.

In FIG. 11, low-voltage power line terminals 70a and 70b are arranged at two locations on the upper side and the lower side of the tank 10, and the high-voltage power line terminal 71 is arranged at the bottom of the tank.

In transformer equipment, distribution wires may be wired at a position lower than the transformer installation surface, and equipment requiring power supply may be installed at a position higher than the transformer installation surface. With the transformer equipment of FIG. 11, wiring is performed from the low-voltage electric wire terminal 70b on the upper side to the equipment installed at a high position, and wiring of the distribution electric wire is performed from the low-voltage electric wire terminal 70a on the lower side. Compared to the case where the terminals for low-voltage wires are located only on the lower side, wiring with other electrical equipment is easier, and the wires do not pass through the transformer installation part, so the transformer and wires are apparent. Dimension in the width direction is suppressed, and it is possible to improve the landscape.

In this embodiment, not only the structure shown in FIG. 11 but also the conventional low-voltage wire terminals 70a and 70b and the high-voltage wire terminal 71 are arranged at arbitrary positions in the case according to the wiring structure of the distribution wire. Compared to the structure in which terminals for connecting electric wires are arranged on the surface, it is expected that the wiring workability will be improved, and the installation area of the transformer including the electric wires will be reduced to make the transformer equipment with a good view. Can be done.

It should be noted that this embodiment can be applied not only to a multi-stage transformer composed of a plurality of assemblies but also to a transformer having a structure composed of one assembly. The above-mentioned embodiment can also be carried out by combining the respective components.

10 Tank 11 Cover 12 Iron core 13 Winding 20 Single-phase transformer (iron core-winding assembly)
21 Metal fittings 30 Leader wire 400 to 411 Leader position 50 Bar duct 60 Relay plate 61 Connection terminal 70a Lower side low voltage wire terminal 70b Upper side low voltage wire terminal 71 High voltage wire terminal

Claims (15)

A transformer device having an assembly having an iron core and a winding wound around the iron core, and a container covering the assembly.
A plurality of the assemblies are arranged in a multi-tiered manner in the container.
A transformer facility in which the plurality of assemblies are arranged at different positions or angles when the container is viewed in a plan view. In the transformer equipment according to claim 1,
A transformer facility in which the plurality of assemblies are arranged so as to be offset by a predetermined angle. In the transformer equipment according to claim 2,
Assuming that the number of stacked stages of the plurality of assemblies is n, the transformer equipment is characterized in that the plurality of assemblies are arranged so as to be offset by 180 / n degrees or 180 / n degrees + −180 degrees from each other. In the transformer equipment according to claim 2,
A transformer facility in which the plurality of assemblies are arranged so as to be offset in a predetermined angle range. In the transformer equipment according to claim 1,
A transformer facility characterized in that the container has a substantially cylindrical shape. A transformer device having an assembly having an iron core and a winding wound around the iron core, and a container covering the assembly.
A plurality of the assemblies are arranged in a multi-tiered manner in the container.
The wiring of the lower assembly is wired so as to pass through the winding of the upper assembly ,
A transformer facility characterized in that connection terminals for power distribution electric wire connection are arranged on a plurality of surfaces of the container, and low voltage electric wire terminals are arranged on the upper side and the lower side of the container . In the transformer equipment according to claim 6,
A transformer facility characterized in that the leader wire of the winding of the lower assembly is wired so as to pass through the inside of the winding of the upper assembly. In the transformer equipment according to claim 7,
The winding comprises a bar duct forming an oil passage through which insulating oil for cooling the winding passes.
A transformer facility characterized in that a leader wire of the lower assembly is wired so as to pass through a gap of the rod duct of the winding of the upper assembly. In the transformer equipment according to claim 6,
The windings of the upper assembly are equipped with a means of relaying the wiring.
A transformer facility characterized in that a leader wire of a lower assembly is connected to the relay means. In the transformer equipment according to claim 9,
A relay plate for wiring is provided inside the winding of the upper assembly.
A transformer facility characterized in that the leader wire of the lower assembly is connected to the relay plate. In the transformer equipment according to any one of claims 1 to 5 ,
A transformer facility characterized in that connection terminals for connecting electric wires for distribution are arranged on a plurality of surfaces of the container. In the transformer equipment according to claim 11,
A transformer facility characterized in that terminals for low-voltage electric wires are arranged on the upper side and the lower side of the container. In the transformer equipment according to any one of claims 1 to 10.
A transformer facility characterized in that a connection terminal for connecting a power distribution electric wire is arranged inside the container. In the transformer equipment according to claim 13,
A transformer facility characterized in that a wireless communication means is arranged in the container. In the transformer equipment according to claim 14,
A transformer facility characterized in that an antenna connected to the wireless communication means is arranged outside the container.

Images