CN204992266U - 220 kilovolt main transformer's inlet wire draws and connects device - Google Patents

Abstract

The utility model discloses an incoming line lead-in device for a 220 kV main transformer, comprising a power distribution building and a 220 kV main transformer, the power distribution building is provided with 110 kV GIS bushing terminals, and the 220 kV The main transformer is provided with a 110 kV bushing terminal of the main transformer; a main transformer 110 kV side lead frame is erected near the 110 kV bushing terminal of the main transformer, and the outer wall of the power distribution building is provided with a first hanging point, so The main transformer 110 kV side lead frame and the first hanging point are connected with the main transformer 110 kV side jumper, the main transformer 110 kV side jumper leads down the main transformer 110 kV side lead and the main transformer 110 kV Bushing terminal connection, the main transformer 110 kV side jumper leads down the 110 kV GIS side lead to connect to the 110 kV GIS bushing terminal. By adopting the utility model, the pulling force of the leading wires on the bushing terminals of the main transformer can be greatly reduced, thereby eliminating the safety accidents that are prone to oil leakage at the bushing terminals of the main transformer.

Description

A 220kV Main Transformer Lead-In Device

technical field

The utility model relates to the technical field of electric power engineering, in particular to an incoming line lead-in device for a 220 kilovolt main transformer.

Background technique

The current 110 kV side incoming line of the main transformer of the 220 kV indoor substation adopts steel-cored aluminum stranded wires to jump directly between the 110 kV GIS bushing terminal and the main transformer 110 kV bushing terminal. The two ends are bolted to the bushing terminals on both sides through equipment clamps. There is no other support or fixing measures in the middle of the jumper wire. The weight of the jumper wire is completely composed of the 110 kV GIS bushing terminal and the main transformer 110 kV bushing terminal. bear. See Figure 1 for the detailed wiring scheme.

On the one hand, due to the large horizontal distance between the 110 kV GIS bushing terminal and the main transformer 110 kV bushing terminal, the horizontal span of the lead wires between the terminals on both sides is large, and there is no other support or fixation in the middle of the lead wires, resulting in The tension is relatively large; on the other hand, due to the large capacity of the 220 kV main transformer, the rated current on the 110 kV side is relatively large. The existing technology uses double-split wires as the leading wires on the 110 kV side of the main transformer. The weight of the double-split wires The heavy weight also directly leads to the increase of the lead wire tension between the bushing terminals on both sides; and the increase of lead wire tension makes the pull force of the lead wire to the main transformer bushing terminal also increase synchronously, and the main transformer bushing terminal bears a large pulling force for a long time. As a result, the displacement relative to the bushing will gradually occur, and the sealing measures between the bushing terminal and the bushing will be destroyed, and finally a gap will appear between the main transformer bushing terminal and the bushing, and the insulating oil in the bushing will leak out from the gap. cause safety accidents.

Utility model content

The technical problem to be solved by the utility model is to provide a 220 kV main transformer incoming line lead-in device, which can greatly reduce the pulling force of the lead-in wires on the main transformer bushing terminals, and further eliminate the leakage at the main transformer bushing terminals. Oil spill accidents.

In order to solve the above technical problems, the utility model provides a 220 kV main transformer incoming line lead-in device, including a power distribution building and a 220 kV main transformer, and a 110 kV GIS bushing terminal is provided outside the power distribution building , the 220 kV main transformer is provided with a main transformer 110 kV bushing terminal;

The main transformer 110 kV side lead frame is erected near the 110 kV bushing terminal, the outer wall of the power distribution building is provided with a first hanging point, and the main transformer 110 kV side lead The points are connected with the main transformer 110 kV side jumper, the main transformer 110 kV side jumper leads down the main transformer 110 kV side lead wire and the main transformer 110 kV bushing terminal, the main transformer 110 kV side jumper The down-leading 110 kV GIS side lead is connected to the 110 kV GIS bushing terminal.

As an improvement of the above scheme, the power distribution building includes a 220 kV GIS room and a 110 kV GIS room, the 220 kV GIS bushing terminal is connected to the 220 kV GIS room, and the 110 kV GIS bushing terminal is connected to the 110 kV KV GIS room connection.

As an improvement of the above scheme, the 220 kV main transformer is also provided with a 220 kV bushing terminal of the main transformer, and a main transformer 220 kV side lead frame is erected near the 220 kV bushing terminal of the main transformer. The floating platform on the sky of the electric building is provided with a second hanging point, and the main transformer 220 kV side jumper is set between the main transformer 220 kV side lead frame and the second hanging point.

As an improvement to the above solution, the 220 kV main transformer is provided with a main transformer oil tank.

As an improvement to the above solution, the distance between the centerline of the main transformer 110 kV side lead frame and the centerline of the main transformer oil tank is 1.5-2m.

As an improvement to the above scheme, the distance between the centerline of the main transformer 220 kV side lead frame and the centerline of the main transformer oil tank is not less than 4.5m.

As an improvement of the above scheme, the elevation of the wire-hanging point of the beam of the 110 kV side lead frame of the main transformer is 12.5-13.5m.

As an improvement of the above scheme, the elevation of the wire-hanging point of the beam of the 220 kV side lead frame of the main transformer is 17-19m.

Implementing the utility model has the following beneficial effects:

The utility model is equipped with a main transformer 110 kV side lead wire frame near the main transformer 110 kV bushing terminal. By cooperating with the first hanging point on the outer wall of the power distribution building, the main transformer 110 kV side jumper is set at 110 Above the kilovolt GIS bushing terminal and the 110 kV bushing terminal of the main transformer, the weight of the leading wires connected to the jumper by the weight of the lead wires connected to the 110 kV GIS bushing terminal and the main transformer 110 kV bushing terminal respectively are determined by the jumper Commitment, greatly reducing the long-term tensile force of the 110 kV bushing terminal of the main transformer and the 110 kV GIS bushing terminal, thereby reducing the damage of the tension to the seal between the bushing terminal and the bushing and causing oil leakage from the bushing terminal, reducing the The incidence of security incidents.

In addition, through the above setting of the position and height of the main transformer 110 kV side lead frame and the main transformer 220 kV side lead frame, it can ensure the distance between the main transformer 220 kV side span and the main transformer 110 kV side span Sufficient height difference is left to prevent maintenance personnel from touching the 220 kV side jumper of the main transformer above when overhauling the 110 kV side lead frame of the main transformer and causing a safety accident.

Description of drawings

Fig. 1 is the structural schematic diagram of the incoming line lead-in device of existing 220 kilovolt main transformer;

Fig. 2 is a structural schematic diagram of a 220 kV main transformer incoming line lead-in device of the present invention.

detailed description

In order to make the purpose, technical solution and advantages of the utility model clearer, the utility model will be further described in detail below in conjunction with the accompanying drawings.

As shown in Figure 2, the utility model provides a 220 kV main transformer 2 incoming line lead-in device, including a power distribution building 1 and a 220 kV main transformer 2, and the power distribution building 1 is equipped with a 110 kV GIS Bushing terminal 3, the 220 kV main transformer 2 is provided with a main transformer 110 kV bushing terminal 4;

The main transformer 110 kV bushing terminal 4 is erected with a main transformer 110 kV side lead frame 5, the outer wall of the power distribution building 1 is provided with a first hanging point 6, and the main transformer 110 kV side lead frame 5 and the first hanging point 6 are connected with the main transformer 110 kV side jumper 7, the main transformer 110 kV side jumper 7 leads down the main transformer 110 kV side lead 15 and the main transformer 110 kV bushing terminal 4 Connection, the main transformer 110 kV side jumper 7 leads down the 110 kV GIS side lead 16 to connect with the 110 kV GIS bushing terminal 3.

In the prior art, there is no lead frame on the 110 kV bushing terminal 4 side of the main transformer, and the 110 kV bushing terminal 4 of the main transformer and the 110 kV GIS bushing terminal 3 are directly connected by lead wires, so the weight of the lead wires It is undertaken by the 110 kV bushing terminal 4 of the main transformer and the 110 kV GIS bushing terminal 3. The bushing terminal bears a large force, which may easily cause oil leakage from the bushing terminal, posing a safety hazard.

In order to reduce the tensile force on the 110 kV bushing terminal 4 of the main transformer and the 110 kV GIS bushing terminal 3 in the utility model, a main transformer 110 kV side lead frame 5 is erected near the 110 kV bushing terminal 4 of the main transformer , and a first hanging point 6 is set at a corresponding position on the outer wall of the power distribution building 1, and the main transformer 110 kV side lead frame 5 is connected to the first hanging point 6 through the main transformer 110 kV side jumper 7. It should be noted that the main transformer 110 kV side jumper 7 is located above the 110 kV GIS bushing terminal 3 and the main transformer 110 kV bushing terminal 4, so when the main transformer 110 kV bushing terminal 4 and 110 kV When the GIS bushing terminal 3 is respectively connected to the main transformer 110 kV side jumper 7, the weights of the two leading wires of the main transformer 110 kV side lead 15 and the 110 kV GIS side lead 16 are determined by the main transformer 110 kV side jumper. Line 7 is responsible for reducing the long-term tension of the 110 kV bushing terminal 4 and 110 kV GIS bushing terminal 3 of the main transformer, thereby reducing the damage to the seal between the bushing terminal and the bushing caused by the pulling force and causing leakage of the bushing terminal Oil, reduce the incidence of safety accidents.

Preferably, the distribution building 1 includes a 220 kV GIS room 11 and a 110 kV GIS room 12, the 220 kV GIS bushing terminal 8 is connected to the 220 kV GIS room 11, and the 110 kV GIS Pipe terminal 3 is connected to 110 kV GIS chamber 12 .

Preferably, the 220 kV main transformer 2 is also provided with a main transformer 220 kV bushing terminal 9, and a main transformer 220 kV side lead frame 10 is erected near the main transformer 220 kV bushing terminal 9. There is a second hanging point 17 on the ceiling floating platform of distribution building 1, and a main transformer 220 kV side lead frame 10 is provided between the main transformer 220 kV side lead frame 10 and the second hanging point 17 on the ceiling floating platform of the distribution building. Cross line 13.

The utility model is provided with the main transformer 220 kV side lead frame 10 to reduce the weight of the lead wires connected to the 220 kV GIS bushing terminal 8, however, the main transformer 220 kV side jumper 13 is connected to the main The position of the lead frame 5 on the 220 kV main transformer 2 is relatively close, which may easily cause a safety accident that the maintenance personnel touch the lead wire on the 220 kV side of the main transformer above when they are overhauling the lead frame 5 on the 110 kV side of the main transformer and get injured , so it is necessary to specially set the safety distance between the two main transformer lead frames.

Preferably, the utility model is based on the center line of the main transformer oil tank 14 of the 220 kV main transformer 2, and the distance between the center line of the 110 kV side lead frame 5 of the main transformer and the center line of the main transformer oil tank 14 is 1.5~2m . The distance between the centerline of the main transformer 220 kV side lead frame 10 and the centerline of the main transformer oil tank 14 is not less than 4.5m. The 110 kV side lead frame of the main transformer has a 5 beam hanging point elevation at 12.5~13.5m. The main transformer 220 kV side lead frame 10 beam hanging point elevation is 17~19m.

More preferably, the distance between the centerline of the main transformer 110 kV side lead frame 5 and the centerline of the main transformer oil tank 14 is 1.7m. The distance between the centerline of the main transformer 220 kV side lead frame 10 and the centerline of the main transformer oil tank 14 is not less than 4.5m. The 110 kV side lead frame of the main transformer has a 5 beam hanging point elevation of 13m. The main transformer 220 kV side lead frame 10 beam hanging point elevation is 18m.

Among them, the elevation in Fig. 2, the distance between the centerline of main transformer 110 kV side lead frame 5 and the centerline of main transformer oil tank 14, and the distance between the centerline of main transformer 220 kV side lead frame 10 and the centerline of main transformer oil tank 14 Distance is one specific example.

Through the above setting of the position and height of the main transformer 110 kV side lead frame 5 and the main transformer 220 kV side lead frame 10, it can be ensured that the main transformer 220 kV side jumper 13 and the main transformer 110 kV side jumper 7 Sufficient height difference is left between them, so as to prevent maintenance personnel from touching the main transformer 220 kV side jumper 13 above when the main transformer 110 kV side lead frame 5 is overhauled, causing a safety accident.

The above is a preferred embodiment of the present utility model, it should be pointed out that for those of ordinary skill in the art, without departing from the principle of the present utility model, some improvements and modifications can also be made, these improvements and modifications It is also regarded as the protection scope of the present utility model.

Claims (8)

1. the inlet wire of 220 kilovolts of main transformers draws a connection device, it is characterized in that, comprises distribution building and 220 kilovolts of main transformers, is provided with 110 kilovolts of GIS sleeve pipe terminals outside described distribution building, and described 220 kilovolts of main transformers are provided with main transformer 110 KV casing terminal;

Near described main transformer 110 KV casing terminal, erection has main transformer 110 kilovolts of side leadframe, described distribution building exterior wall is provided with the first hanging point, main transformer 110 kilovolts of side cross-lines are connected with between described main transformer 110 kilovolts of side leadframe and the first hanging point, draw main transformer 110 kilovolts of side lead-in wires under main transformer 110 kilovolts of side cross-lines to be connected with main transformer 110 KV casing terminal, under main transformer 110 kilovolts of side cross-lines, draw 110 kilovolts of GIS side lead-in wires and 110 kilovolts of GIS sleeve end sub-connections.

2. the inlet wire of 220 kilovolts of main transformers draws connection device as claimed in claim 1, it is characterized in that, described distribution building comprises 220 kilovolts of GIS rooms and 110 kilovolts of GIS rooms, and 220 kilovolts of GIS sleeve pipe terminals are connected with 220 kilovolts of GIS rooms, and described 110 kilovolts of GIS sleeve pipe terminals are connected with 110 kilovolts of GIS rooms.

3. the inlet wire of 220 kilovolts of main transformers draws connection device as claimed in claim 2, it is characterized in that, described 220 kilovolts of main transformers are also provided with main transformer 220 KV casing terminal, near described main transformer 220 KV casing terminal, erection has main transformer 220 kilovolts of side leadframe, the terrace platform that wafts in described distribution building is provided with the second hanging point, is provided with main transformer 220 kilovolts of side cross-lines between described main transformer 220 kilovolts of side leadframe and described second hanging point.

4. the inlet wire of 220 kilovolts of main transformers draws connection device as claimed in claim 3, it is characterized in that, described 220 kilovolts of main transformers are provided with main transformer fuel tank.

5. the inlet wire of 220 kilovolts of main transformers draws connection device as claimed in claim 4, it is characterized in that, the spacing of described main transformer 110 kilovolts of side leadframe center lines and main transformer fuel tank center line is 1.5 ~ 2m.

6. the inlet wire of 220 kilovolts of main transformers draws connection device as claimed in claim 4, it is characterized in that, the spacing of described main transformer 220 kilovolts of side leadframe center lines and main transformer fuel tank center line is no less than 4.5m.

7. the inlet wire of 220 kilovolts of main transformers draws connection device as claimed in claim 4, it is characterized in that, described main transformer 110 kilovolts of side leadframe crossbeam hanging wire point absolute altitudes are at 12.5 ~ 13.5m.

8. the inlet wire of 220 kilovolts of main transformers draws connection device as claimed in claim 4, it is characterized in that, described main transformer 220 kilovolts of side leadframe crossbeam hanging wire point absolute altitudes are at 17 ~ 19m.