CN202549587U - 500kV transformer body insulating structure in accordance with full insulation level - Google Patents

Abstract

The utility model provides a body insulation structure of a 500kV transformer conforming to the full insulation level, including a high-voltage winding and a low-voltage winding; several layers of insulating paper tubes are arranged between the high-voltage winding and the low-voltage winding; The outer circumference of the winding; between the insulating paper tubes, use insulating stays to pad evenly along the circumference. The utility model includes the main insulation structure, the end insulation structure and the insulation structure at the outlet; the main insulation adopts the thin paper tube small oil channel structure, and the 2mm insulating paper tube is used to reasonably divide the oil gap; the oil gap is divided by multi-channel forming angle rings , to improve the electric field at the end to make it evenly and reasonably distributed; use special-shaped insulating moldings at the outlets to improve the electrode shape of the outlets, and lead them out to the outside of the iron window to ensure the electrical insulation distance; between the insulation moldings of the upper and lower high-voltage outlets and Corrugated cardboard and 0.5mm cardboard are alternately wrapped and fixed between the outside of the formed part and the supporting plate or pressure ring, which not only ensures the necessary oil gap, but also makes the formed part firm and stable.

Description

A Body Insulation Structure of 500kV Transformer Conforming to Full Insulation Level

technical field

The utility model relates to a body insulation structure for a transformer with a voltage level of 500kV, and is especially suitable for an oil-immersed transformer with a voltage level of 500kV where the high-voltage winding requires a full insulation level. the

Background technique

The 500kV voltage level transformer high-voltage winding outgoing wires required by the full insulation level adopts the upper and lower end outgoing wires. The main insulation, end insulation and insulation structure design at the outgoing wires are important components of this type of transformer insulation structure. the

For ultra-high voltage transformers with a voltage level up to 500kV, the selection of its insulation structure and the design of each insulation connection are very critical. If it is not handled properly, the entire insulation structure will be ineffective. the

Utility model content

The purpose of the utility model is to provide a body insulation structure of a 500kV transformer conforming to the full insulation level, so as to solve the above-mentioned technical problems. the

In order to achieve the above object, the utility model adopts the following technical solutions:

A body insulation structure of a 500kV transformer that meets the full insulation level, including a high-voltage winding and a low-voltage winding; several layers of insulating paper tubes are arranged between the high-voltage winding and the low-voltage winding; the insulating paper tubes are arranged on the outer periphery of the high-voltage winding; the insulating paper Use insulating stays between the cylinders to evenly pad along the circumference. the

The further improvement of the utility model is that: the two ends of the high-voltage winding are respectively provided with several insulating angle rings. the

The further improvement of the utility model is that: the insulating structure of the body also includes iron windows, special-shaped insulating moldings and insulating moldings; the insulating angle ring is connected with special-shaped insulating moldings; Outside the iron window. the

The further improvement of the utility model is that: the gap between the insulating moldings is filled with the first corrugated cardboard assembly structure. the

The further improvement of the utility model is that: the first corrugated cardboard assembly structure is formed by alternately wrapping corrugated cardboard and 0.5mm insulating cardboard. the

The further improvement of the utility model is that: the insulation structure of the body also includes a transformer body pressure plate and a second corrugated cardboard assembly structure; the gap between the insulating molding and the transformer body pressure plate is fully supported by the second corrugated cardboard assembly structure tight. the

The further improvement of the utility model is that: the second corrugated cardboard assembly structure is formed by wrapping corrugated cardboard and 0.5mm insulating cardboard alternately. the

Compared with the prior art, the utility model has the following advantages: the body structure of the 500kV transformer with full insulation level of the utility model includes the main insulation structure, the end insulation structure and the insulation structure at the outlet; the main insulation adopts a small paper tube The oil channel structure uses 2mm insulating paper tubes to reasonably divide the oil gap; the upper and lower ends of the high-voltage winding are equipped with electrostatic plates, and the appropriate upper and lower insulation distances are given by calculation, and then the oil gap is divided by multi-channel forming angle rings , to improve the electric field at the end, so that its distribution is uniform and reasonable; the upper and lower outlets of the high-voltage winding use special-shaped insulating moldings to improve the electrode shape of the outlets, and lead them out to the outside of the iron window to ensure the electrical insulation distance; the insulation of the upper and lower high-voltage outlets Corrugated cardboard and 0.5mm cardboard are alternately wrapped and fixed between the molded parts and the outside of the molded parts and the supporting plate or pressure ring, which not only ensures the necessary oil gap, but also makes the molded parts firmly fixed. the

Description of drawings

Fig. 1 is the upper end view of the body insulation structure;

Fig. 2 is the lower end view of body insulation structure;

Fig. 3 is a cross-sectional view along line A-A of Fig. 1 and Fig. 2 . the

Figure 1-Figure 3: 1-high voltage winding; 2-insulating paper tube; 3-insulating stay; 4-insulating angle ring; 5-shaped insulating molding; 6-insulating molding; 7-first corrugated cardboard assembly Structure; 8 - Second corrugated cardboard assembly structure. the

Detailed ways

Below in conjunction with accompanying drawing, the utility model is described in detail:

Please refer to Fig. 1 to Fig. 3, the utility model is a 500kV transformer body insulation structure conforming to the full insulation level, including the main insulation structure, the end insulation structure and the insulation structure at the outlet. The main insulation between the high-voltage winding 1 and the low-voltage winding is effectively divided by the multi-layer insulating paper tube 2, so that the electric field distribution is uniform and reasonable. Strength; because the electric field at the end of the high-voltage winding is extremely uneven, and the amplitude of the iron yoke is asymmetrical, the electric field is also asymmetrical, so five insulating angle rings 4 are designed here to improve the electric field at the end, and used at the head position The special-shaped insulating forming part 5 protects the head. The cylinder with a larger diameter under the special-shaped insulating forming part 5 is connected to the insulating angle ring 4, and the round hole with a larger diameter on the top is connected to the insulating forming part 6 to ensure the insulation distance between the head and other coils. Formed parts 6 are overlapped with them and lead out to the outside of the iron window; between the insulating formed parts 6, the first corrugated cardboard assembly structure 7 is used to fill the gap between them. The corrugated cardboard assembly structure is alternately wrapped by corrugated cardboard and 0.5mm insulating cardboard, that is The oil-paper insulation structure device is guaranteed, and the oil flow and heat dissipation can be guaranteed; finally, the whole outlet device and the pressure plate of the body are firmly supported by the second corrugated cardboard assembly structure 8 . the

The above is only one embodiment of the utility model, not all or the only implementation, and any equivalent transformation taken by those of ordinary skill in the art to the technical solution of the utility model by reading the specification of the utility model shall be considered as the present invention. covered by the claims of the utility model. the

Claims (7)

1. a device body insulation structure that meets the 500kV transformer of all insulation level is characterized in that, comprises high pressure winding (1) and low pressure winding; Be provided with several layers insulating paper cylinder (2) between high pressure winding (1) and the low pressure winding; Said insulating paper cylinder (2) is arranged at high pressure winding (1) periphery; Evenly pad along circumference with insulating stay (3) between the insulating paper cylinder (2).

2. a kind of device body insulation structure that meets the 500kV transformer of all insulation level according to claim 1 is characterized in that the two ends of high pressure winding (1) are respectively equipped with some roads insulation collar rings (4).

3. a kind of device body insulation structure that meets the 500kV transformer of all insulation level according to claim 2 is characterized in that said device body insulation structure also comprises barred window, special-shaped insulation molding part (5) and insulation molding part (6); Be connected with special-shaped insulation molding part (5) on the insulation collar ring (4); Insulation molding part (6) overlaps special-shaped insulation molding part (5) and draws outside barred window.

4. a kind of device body insulation structure that meets the 500kV transformer of all insulation level according to claim 3 is characterized in that the gap between insulation molding part (6) pads with the first corrugated cardboard assembly structure (7).

5. a kind of device body insulation structure that meets the 500kV transformer of all insulation level according to claim 4 is characterized in that the first corrugated cardboard assembly structure (7) alternately is wrapped to form for corrugated cardboard and 0.5mm insulating board.

6. according to claim 4 or 5 described a kind of device body insulation structures that meet the 500kV transformer of all insulation level, it is characterized in that said device body insulation structure also comprises the transformer body pressing plate and the second corrugated cardboard assembly structure (8); Gap between insulation molding part (6) and the transformer body pressing plate is padded stretching by the second corrugated cardboard assembly structure (8).

7. a kind of device body insulation structure that meets the 500kV transformer of all insulation level according to claim 6 is characterized in that the second corrugated cardboard assembly structure (8) alternately is wrapped to form for corrugated cardboard and 0.5mm insulating board.

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