JP2790389B2 - Split type transformer - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a transformer,
Large-capacity, high-voltage transformers with at least two one-phase transformers
The present invention relates to a transformer having improved seismic performance of a divided transformer.

[0002]

2. Description of the Related Art In recent years, due to rising prices of urban land,
Power supply sites, such as power plants, are often constructed in locations far from power demanding sites. Recently, UHV power transmission has been studied as such power transmission from a remote distance. UHV
Substations for transmission will be located in the mountains. Transformers used in such substations are conventionally manufactured within strict transportation restrictions. However, since the voltage is high and the capacity is large, a transformer in which a three-phase transformer is divided into six is being studied. An example of such a transformer for one phase is shown in FIG.

In FIG. 3, reference numeral 23 denotes a winding 25 and an iron core inside.
It is a tank that stores 24 etc. Here, each transformer is simply referred to as a transformer 1A and a transformer 1B. 5
Is a duct connected to the transformer 1A and the transformer 1B. Inside the duct 5, lead wires 14 and 15 having a common potential of the transformer 1A and the transformer 1B are accommodated.
The lead wires 14 and 15 are connected to bushings 16 and 17 and to gas-insulated equipment. These transformers 1A, 1
B, the duct 5 and the like are separately transported to the site and assembled and integrated on site.

[0004]

Such a transformer has the following problems.

As described above, the transformers 1A and 1B are separately transported to the site of the substation, and are separately installed on the foundation at the site. Then, the transformers 1A and 1B are integrated by the tank 5. In that case, for example, the transformer 1
A is set on the foundation, then the duct 5 is attached to the transformer 1A, and the transformer 1B is attached to the duct.

As mentioned above, when assembling the transformer 1A, the duct 5, and the transformer 1B in this order, the duct 5
And the positions of the transformers 1A and 1B must be accurately determined. However, since the transformers 1A and 1B are heavy, they are moved by rolling. As is well known, fine movement is difficult in the case of the dropping movement, which requires not only a long assembling time (moving time) of the transformer but also a skill.

Further, when the transformer 1A and the duct 5 are set on the foundation and the transformer 1B is mounted on the duct, it is difficult to adjust the position of the bolts and the like by rolling the transformer 1B. It takes a lot of time to set up on the foundation of the building. In particular, the transformer has a roller bar set under the transformer to be moved by roller pulling as described above, and the height direction differs by that much.
The work of connecting B and the duct 5 is difficult.

Further, after the transformer is installed, the transformers 1A and 1B are only connected at two points, a high-pressure side duct and a medium-pressure side duct. For example, when an earthquake occurs, In other words, the transformers 1A and 1B vibrate separately, and an excessive force is applied to the mounting portion of the duct. Therefore, the duct mounting portion requires a structure having high mechanical strength.

The present invention has been made in view of the above points, and has as its object to facilitate installation of the transformers 1A and 1B and the duct 5 on site and to provide a highly reliable transformer with excellent earthquake resistance. Is to provide.

[0010]

In the present invention, the transformers 1A and 1B are installed on a foundation, and the two divided transformers are fixed by connecting beams at opposing portions. In addition, the beam is attached to the transformer 1A after setting the transformer 1A on the foundation, for example, and then the transformer 1B
Is the guide beam when setting on the foundation.

[0011]

According to the present invention having the above-described structure, the following functions and effects are obtained.

In the present invention, after setting the transformer 1A on the foundation, the connecting beam is attached to the transformer 1A.
Therefore, it becomes a guide plate of the transformer 1B. for that reason,
The work of setting on the foundation of the transformer 1B is facilitated, and the work of installing the transformer 1B on the foundation is shortened.

Further, after setting the transformer 1A on the foundation, the transformer 1A is fixedly connected to the transformer 1B by the connecting beam.
A and 1B can be handled as one integrated from the mechanical structure, and even if an earthquake or the like occurs, no excessive force is applied to the duct attached between the transformers 1A and 1B, and the seismic performance is improved.

[0014]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The detailed description of the present invention will be described below with reference to the drawings. The same parts as those in the related art are denoted by the same reference numerals, and description thereof is omitted. 1 and 2 show one embodiment of the present invention. FIG. 1 is a plan view showing one embodiment of the present invention, and FIG. 2 is a front view thereof. 1 and 2, 1A,
1B is a unit transformer when one phase is divided into two, and a duct 5 containing a common potential line from the transformers 1A and 1B is attached between them. The duct 5
It is almost T-shaped, with a bushing 16,
17 is installed.

Reference numerals 20 and 21 are connecting beams of the present invention. The connecting beams are attached to opposing portions of the transformers 1A and 1B. And connecting beams 20, 21
Are connected to the reinforcing beams of the tanks of the transformers 1A and 1B. Further, the connecting beam 14 is attached to at least one location on at least one long side of the transformers 1A and 1B and is connected to the transformers 1A and 1B.

Further, in FIG. 2, reference numeral 27 denotes a beam 27 installed on a transformer foundation 28 made of concrete or the like.
It is. This beam is a common beam of the transformers 1A and 1B. In the transformer configured as described above, the following operation and effect are produced.

After setting the transformer 1A on the foundation, the connecting beams 20, 21 and the duct 5 are attached to the transformer 1A. Thereafter, the transformer 1B is moved to a proper position by roller pulling and installed. However, since the connecting beams 20, 21 and 27 serve as guide plates for the movement of the transformer 2, the transformer 1B is set on the foundation of the transformer 1B. And the installation work of the transformer 1B on the foundation is shortened. Therefore, the opening time of the duct on the side connected to the transformer 1B is shortened, the moisture absorption into the duct by the opening is reduced, and not only the assembling time is shortened, but also a reliable transformer is provided. Can be done.

The connecting beams 20, 21 are attached at at least two places in the longitudinal direction of the transformer, and are also connected by a common beam 27, so that the transformers 1A, 1B
Has the same vibration in the event of an earthquake or the like, and its seismic performance is improved. In particular, by connecting the two transformers with a connecting beam, no excessive force is applied to the duct part even in the event of an earthquake, etc., so there is no need to reinforce the connecting part of the duct with the transformer, A small and light split transformer can be obtained.

[0019]

As described above, according to the present invention, by connecting a connecting beam between transformers,
Not only the working time on site can be shortened, but also a split type transformer having excellent earthquake resistance can be provided.

[Brief description of the drawings]

FIG. 1 is a plan view showing an embodiment of the present invention.

FIG. 2 is a plan view showing one embodiment of the present invention.

FIG. 3 is a plan view showing a conventional transformer.

[Explanation of symbols]

 23 ... Tank 25 ... Winding 5 ... Duct 14, 15 ... Lead wire 16, 17 ... Bushing 1A, 1B ... Unit transformer 20, 21, 27 ... Connecting beam

Claims (6)

(57) [Claims] 1. A plurality of windings and an iron core are housed in a tank to form a transformer, and one phase of the transformer is at least two.
In a transformer that is divided into two tanks, a lead wire having a common potential is drawn out from each tank, and the lead wire is arranged inside a duct attached to the divided transformer, the beam transformers are connected to the respective transformers. A split type transformer characterized by being commonly connected by: 2. The split-type transformer according to claim 1, wherein the beams commonly connecting the split transformers are connected at opposing portions of each of the split transformers. 3. The beam for connecting the divided transformers in common is mounted at at least one position below the position of a duct into which a lead wire having a common potential is inserted. Split type transformer. 4. The split-type transformer according to claim 1, wherein the beams commonly connecting the split transformers are attached at at least two places in the longitudinal direction of the transformer. 5. The split-type transformer according to claim 1, wherein the beam commonly connecting the split transformers is mounted via a reinforcing beam of the transformer tank. 6. The split transformer according to claim 1, wherein at least one of the beams commonly connecting the split transformers is a beam buried on a transformer base.