JP2901443B2 - How to assemble a split 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 method for assembling a split transformer.

[0002]

2. Description of the Related Art With the increase in power demand and the increase in capacity and voltage of power transformers, the location conditions of substations and power plants are deteriorating in various aspects. Due to the spread, road and rail transportation restrictions are becoming stricter year by year. In this social situation, ultra-high-voltage, large-capacity power transformers have been divided into three phases to form three-phase transformers. This is the actual situation. For this reason, a so-called split-type transformer, which divides a single-phase device into multiples, is adopted to solve the transportation problem. In the case of such a split transformer,
It is natural that the connection work between the divided unit transformers becomes necessary, but the connection work on site has a bad working environment,
A problem has arisen in terms of ensuring reliability.

[0003] In particular, in connection work between unit transformers of an ultra-high voltage section of 500 kV or 1000 kV, a connection unit between tanks is composed of a lead wire, an insulating barrier, a bushing, and the like, so that dust and moisture from outside enter. Is an important point of quality control.

Conventionally, quality control has been performed according to the Electric Cooperative Research Vol. 31 No. 5 “Large-capacity Transformer Field Work Standards”. However, in the connection work between unit transformers of a 1000 kV class split transformer, furthermore, Quality control needs to be strengthened,
Technology development is needed.

[0005]

[Problems to be Solved by the Invention] 500 kV or 1000
The insulation configuration of the ultra-high voltage transformer of kV is made by dividing the oil gap with an insulation barrier and strictly controlling the moisture in the insulator and the number of floating particles in the oil to improve the withstand voltage of the oil gap and reduce the size. I'm trying a little. Therefore, at the time of manufacture, winding and internal assembly work are performed in a dustproof air-conditioning room to prevent dust and moisture from entering, but during the assembly work on site, part of the transformer body is opened and lead connection work is performed. When performing this, it is necessary to work in the same dust-proof air-conditioned room as at the time of production.

[0006] Due to its structure, it is necessary to assemble and connect the unit transformers of the split type transformers while connecting the unit transformers while moving the other unit transformers horizontally while being attached to one unit transformer. This operation must be performed in a dust-proof and air-conditioned environment.

When a dustproof air-conditioning room is provided between unit transformers,
When the inter-tank connecting unit is mounted on one of the unit transformers, the inter-tank connecting unit cannot be lifted by a crane, and an alternative assembling method is required.

The present invention has been made in view of the above points, and provides an assembling method of a split type transformer which enables an assembling operation in a dust-proof and moisture-proof environment, thereby improving workability and reliability. It is intended to do so.

[0009]

SUMMARY OF THE INVENTION The object of the present invention is to provide a method of assembling a split type transformer for connecting a plurality of unit transformers constituting a split type transformer via a tank connecting unit. a step of installing a split split type transformer one unit transformer to the normal position of the local, one side of the stretchable dustproof air conditioning chamber outside of the unit transformer of the one
And attaching the walls, and a step of carrying the tank connections unit to the white room, the one connection portion of the tank between the connection unit to the outer portion of the front SL one unit transformer in the white room and attaching, and attaching the outer part of the other unit transformer of the divided type transformer on the other side wall of the extendable dustproof air-conditioned room, the other unit transformer
The outer part of the vessel is connected to the other connecting part of the tank-to-tank connecting unit.
A step of moving a unit transformer before Symbol other while stretching the white room the to one unit transformer side up position, the other the other coupling part of the tank between the connecting unit in the white room Attaching the unit transformers to the outside of the unit transformer and removing the dustproof air-conditioning room from the outside of the unit transformer after connecting the unit transformers with the tank connecting unit. The connection between the outer portion of the unit transformer and the connection portion of the inter-tank connection unit is performed in the dustproof air-conditioned room.

[0010]

With the provision of the above means, the unit transformers are connected in the dustproof air-conditioned room via the tank connection unit.

[0011]

Next, the present invention will be described in detail with reference to examples.

[Embodiment 1] FIGS. 1 to 7 show an embodiment of the present invention. In the present embodiment, a step of installing one unit transformer 1a of the unit transformers 1a and 1b divided into a plurality of units, a step of attaching one side of the dustproof air-conditioning room 2 to one unit transformer 1a, A step of loading the inter-tank connection unit 3 into the chamber 2, a step of attaching one side of the inter-tank connection unit 3 to a predetermined position of one of the unit transformers 1a, and a step of mounting the other of the plurality of unit transformers 1a and 1b. Attaching the unit transformer 1b to the other side wall of the dustproof air-conditioning room 2; and attaching the other unit transformer 1b to the one unit transformer 1a.
Side and a step of attaching the other side of the inter-tank connection unit 3 to a predetermined position of the other unit transformer 1b, and the divided plurality of unit transformers 1a and 1b are placed in the dustproof air-conditioning room 2. Assembling via the tank connection unit 3,
After the assembly, the dustproof air-conditioning room 2 was removed. In this way, the unit transformers 1a and 1b are
Inside the tank through the inter-tank connection unit 3 to work in a dust-proof and moisture-proof environment, enabling assembly work in a dust-proof and moisture-proof environment, thereby improving workability and reliability. Thus, a method of assembling a split type transformer that can improve the performance can be obtained.

That is, the single-phase transformer is composed of two unit transformers 1
a and 1b.

The unit transformers 1a and 1b are connected via an inter-tank connecting unit 3, lead wires are connected in the inter-tank connecting unit 3, and terminals are drawn out by a bushing 4 to form a single-phase bank. (See FIG. 7).

The operation procedure and quality control for assembling such a single-phase bank on site will now be described.

By providing a mounting seat 1c for mounting a dust-proof air-conditioning room on the side surface of the unit transformer 1a (1b) on the tank-to-tank connection unit side (opposing surfaces of the unit transformers 1a and 1b), Easy installation and completeness (see FIG. 1).

In the on-site assembling operation, first, one of the unit transformers 1a is settled at a proper position, and the inter-tank connecting unit 3 is mounted on the unit transformer 1a. At this time, the transport cover 5 at the connection portion between the unit transformer 1a and the inter-tank connection unit 3 is detached and connected. However, since the dustproof air-conditioning room 2 is attached to one of the unit transformers 1a, the connection work is performed by dustproof air-conditioning. It is performed in the room 2 and can control the amount of dust and humidity.
It is possible to prevent dust and moisture from entering the contents of “a” and the internal lead wires of the tank-to-tank connection unit 3. At this time, the unit transformer 1a and the connection unit 3 between the tanks are provided with valves 6, 7
By working while blowing more dry air, the quality level can be further improved (see FIGS. 2 and 3).

When the inter-tank connecting unit 3 is mounted and connected to the unit transformer 1a in the dustproof air-conditioning room 2, if a heavy machine such as a crane is used to lift the inter-tank connecting unit 3, the upper part of the dustproof air-conditioning room 2 In the connection work, the air enters and the dust and humidity cannot be managed. Therefore, in this embodiment, a truck of the tank-to-tank connection unit transfer device 8 that can move up and down, left and right, and back and forth is used. In this way, after carrying the inter-tank connection unit 3 into the dust-proof air-conditioning room 2, it is possible to mount the unit transformer 1a and the inter-tank connection unit 3 without opening the dust-proof air-conditioning room 2. (See FIG. 4).

The unit transformer 1b is once settled at a position away from the unit transformer 1a by a required dimension from the final assembling position, and is connected to the telescopic part 2 which can expand and contract in the moving direction of the unit transformer 1b of the dustproof air-conditioning room 2. I do. Thereby, the unit transformers 1a, 1b
The space required for the installation and connection work of the inter-tank connection unit 3 is a dust-proof and air-conditioned environment. In this state, the unit transformer 1b is horizontally moved toward the unit transformer 1a, and the unit transformer 1b and the tank connection unit 3 are attached and connected (see FIGS. 5 and 6).

When the unit transformer 1a and the unit transformer 1b are connected via the inter-tank connection unit 3, the dustproof air-conditioning room is removed. This completes the assembly of the split transformer (see FIG. 7).

As described above, according to the present embodiment, it is possible to improve the quality of the on-site assembling work of the split type transformer, and it is possible to perform stable quality control. As a result, a split transformer can be used for an ultra-high voltage transformer of 500 kV or 1000 kV.

[0022]

As described above, the present invention provides a step of installing one of the unit transformers divided into a plurality of unit transformers,
Attaching one side of the dustproof air conditioning room to one of the unit transformers, loading the inter-tank connection unit into the dustproof air conditioning room, and attaching one side of the inter-tank connection unit to a predetermined position of the one unit transformer A step of attaching the other unit transformer of the plurality of unit transformers to the other side wall of the dustproof air-conditioning room; a step of moving the other unit transformer to the one unit transformer side; and a tank connection unit. Attaching the other side of the unit transformer to a predetermined position of the other unit transformer, assembling a plurality of divided unit transformers via a tank connection unit in the dustproof air-conditioning room, and removing the dustproof air-conditioning room after assembly. As a result, the unit transformer is connected via a connection unit between tanks in a dustproof air-conditioned room, so that it can be operated in a dustproof and moistureproof environment, and in a dustproof and moistureproof environment. set Method of assembling a division type transformer which enables to improve the reliability and operability to enable the work can be obtained.

[Brief description of the drawings]

FIG. 1 is a front view showing a state in which a mounting seat is attached according to an embodiment of an assembling method of a split type transformer of the present invention.

FIG. 2 is a side view showing a state in which a dustproof air-conditioning room is attached to one of the unit transformers according to the embodiment.

FIG. 3 is a plan view showing a state where an inter-tank connection unit is attached to one of the unit transformers according to the embodiment.

FIG. 4 is a side view of FIG. 3;

FIG. 5 is a plan view showing a state in which the other unit transformer is mounted on the other side of the dustproof air-conditioning room according to the embodiment.

FIG. 6 is a side view of FIG. 5;

FIG. 7 is a plan view showing a state after the bank configuration of the split type transformer.

[Explanation of symbols]

1a, 1b ... unit transformer, 1c ... mounting seat, 2 ... dustproof air-conditioning room, 2a ... telescopic part, 3 ... tank connection unit, 8 ...
Tank connection unit transfer device.

Claims (1)

(57) [Claims] 1. A method for assembling a split transformer, wherein a plurality of unit transformers constituting the split transformer are connected to each other via a tank-to-tank connecting unit, wherein the split transformer is divided into a plurality of split transformers. Installing one of the unit transformers at a proper location on the site, and expanding and contracting the outside of the one unit transformer.
And attaching the one side wall of the ability of the white room, a step of loading the tank connections unit to the white room, while prior Symbol the one connecting portion of the tank between the connecting unit in the white room and attaching the outer part of the unit transformer, step a, the other unit transformer mounting the outer portion of the other unit transformer of the divided type transformer on the other side wall of the extendable dustproof air-conditioned room Outside of the tank
The dustproof air-conditioning room until it is located at another connection of the connection unit.
A step of moving a unit transformer before Symbol other while stretching said to one unit transformer side of the outer portion of the other of said other unit transformer a connection in the white room of the tank between the connection unit Mounting the unit transformers and connecting the unit transformers to each other with the inter-tank connection unit, and then removing the dustproof air-conditioning room from the outside of the unit transformers. And a connection part of the inter-tank connection unit is connected in the dustproof air-conditioned room.