CN202384150U

CN202384150U - High-power transformer

Info

Publication number: CN202384150U
Application number: CN2011204643774U
Authority: CN
Inventors: 姜山
Original assignee: Individual
Current assignee: Individual
Priority date: 2011-11-22
Filing date: 2011-11-22
Publication date: 2012-08-15
Anticipated expiration: 2021-11-22

Abstract

The utility model relates to the technical field of power generation systems, in particular to a high-power transformer. The high-power transformer comprises a transformer shell, iron cores, low-voltage coil windings and high-voltage coil windings, wherein the iron cores are arranged inside the shell, the low-voltage coil windings are arranged on the middle-column iron core, the left-column iron core and the right-column iron core, the high-voltage coil windings are arranged on the peripheries of the low-voltage coil windings and are of oil semi-channel structures, an insulation coaming is arranged between the outer wall of each low-voltage coil winding and the inner wall of each high-voltage coil winding to form dual oil channels, and the radial cross section of each insulation coaming is wavy; and a circle of insulation coaming is further arranged between the outer wall of each high-voltage coil winding and the transformer shell, the upper and lower ends of the insulation coaming are provided with soft corner rings, and the inner edge of each soft corner ring is provided with a skirt section to be arranged inside the body of the insulation coaming. The high-power transformer disclosed by the utility model is not only reliable in work and good in insulation property but also compact in structure, small in size and low in production cost.

Description

A kind of high-power transformer

Technical field

The utility model relates to the electricity generation system technical field, particularly a kind of high-power transformer.

Background technology

Transformer is by electromagnetic induction principle, with identical frequency, and a kind of static electric equipment of voltage of transformation or electric current between two or more windings.

From the electric energy that power plant sends, give the user (like factory, mine, hospital, school, agriculture forest and husbandry place etc.) in a distant place through very long transmission line, in order to reduce the electric energy loss on the transmission line, must adopt high pressure or superhigh pressure to carry.And the voltage that at present general power plant sends, owing to receive the restriction of insulation level, voltage can not be too high, this will pass through electric energy voltage that transformer sends power plant and raise and deliver to power network.This transformer is commonly referred to as step-up power transformers.

To the user, the needed voltage of various power consumption equipments is not too high again, also will pass through transformer, the high voltage of electric power system is become meet the rated voltage that the various electric equipments of user require, and is referred to as the step-down power transformer as the transformer of this purposes.

At present, the distribution transformer that is used for electric power system mainly is that oil is invaded formula distribution transformer and dry-type distribution transformer, and to invade the volume of formula distribution transformer big for oil comparatively speaking, defectiveness all at aspects such as fire prevention, explosion-proof, environmental protection; Dry-type distribution transformer conform and protective capacities on poor, performance loss is high, noise is high, cost is high.The formula distribution transformer invaded by traditional oil and dry-type transformer all can not satisfy the more and more stricter requirement of market and user.But also occur on the present electricity market can be under various environment can both safe operation, the transformer that good insulation preformance and volume are little, integrated cost is low.

The utility model content

The purpose of the utility model provides a kind of high-power transformer, and it is reliable operation not only, good insulation preformance, and compact conformation, and volume is little, and production cost is low.

For solving the problems of the technologies described above; The utility model provides a kind of high-power transformer, comprises transformer housing, iron core, low-voltage coil winding and high-tension coil winding, and said iron core is located at enclosure interior; Said iron core middle column, left and right sides lateral column are provided with the low-voltage coil winding; Said low-voltage coil winding periphery is provided with the high-tension coil winding, and described high-tension coil winding adopts half oil channel structure, between low-voltage coil winding outer wall and high-tension coil winding inwall, is provided with the insulation coaming plate; To form two oil ducts, described insulation coaming plate radial cross-section undulate; Between the outer wall of high-tension coil winding and transformer housing, also be provided with a circle insulation coaming plate, the upper and lower end parts of said insulation coaming plate is provided with soft corner-ring, and the inner edge of soft corner-ring is provided with and is used to insert the skirt section in the insulation coaming plate body.

Said iron core is a core formula iron core.

Described high-tension coil winding is a cartridge type.

A kind of high-power transformer of the utility model is to make the main empty path between the high and low pressure coil windings into two oil channel structures; So improved insulation effect on the one hand; Make the high-tension coil winding increase radiating surface on the other hand again; Thereby further improved the operating mode of high-tension coil winding, improved insulation property; The 2nd, owing between high-tension coil winding and transformer housing, adopt half oil channel structure, so not only increased high-tension coil dielectric strength over the ground, and can reduce the size of transformer, save the consumption of transformer insulation oil.

Description of drawings

Fig. 1 is a kind of high-power transformer structural representation that the utility model provided;

Fig. 2 is the A-A cutaway view of the utility model Fig. 1;

The sectional schematic diagram of a kind of high-power transformer insulation coaming plate that Fig. 3 carries for the utility model.

Wherein, B1, B2 are low pressure I/O end;

C1, C2 are high pressure I/O end;

1 transformer housing;

2 iron cores;

3 low-voltage coil windings;

4 high-tension coil windings;

5 insulation coaming plates;

6 soft corner-rings.

Embodiment

In order to make those skilled in the art person understand the technical scheme of the utility model better, the utility model is done further to specify below in conjunction with accompanying drawing and embodiment.

Please refer to Fig. 1 to Fig. 3, Fig. 1 is a kind of high-power transformer structural representation that the utility model provided; Fig. 2 is the A-A cutaway view of the utility model Fig. 1; The sectional schematic diagram of a kind of high-power transformer insulation coaming plate that Fig. 3 carries for the utility model.The utility model comprises transformer housing 1, iron core 2, low-voltage coil winding 3 and high-tension coil winding 4; Said iron core 2 is located at enclosure interior, and said iron core is a core formula iron core, and said iron core 2 center pillars, left and right sides lateral column are provided with low-voltage coil winding 3; Said low-voltage coil winding 3 peripheries are provided with high-tension coil winding 4; Described high-tension coil winding 4 adopts half oil channel structure, and described high-tension coil winding is a cartridge type, between low-voltage coil winding 3 outer walls and high-tension coil winding 4 inwalls, is provided with insulation coaming plate 5; To form two oil ducts, described insulation coaming plate 5 radial cross-section undulates; Between the outer wall of high-tension coil winding 4 and transformer housing 1, also be provided with a circle insulation coaming plate 5, the upper and lower end parts of said insulation coaming plate 5 is provided with soft corner-ring 6, and the inner edge of soft corner-ring 6 is provided with and is used to insert the skirt section in insulation coaming plate 5 bodies.

In sum, the utlity model has following remarkable advantage:

1, can save material, reduce cost, improve competitiveness of product.Lead with the wrapping of high pressure turn insulation, can the insulation of lead be reduced to ZB-0.3 from ZB-0.45, and dielectric voltage withstand still can be satisfied user's requirement.

2, if by between the 10KV high-low pressure apart from derivation 15KV master control track pitch from being: 9 * 50/30=13mm, we utilize transformer oil to have " distant effect ", promptly the distance more the puncture voltage of subsection distance grab the high more characteristics of disruptive field intensity; Main empty path structure between the high-low pressure of 10KV is improved; Become the small oil gap structure, the main empty path distance changes 12mm into, improves the insulation property of product; Become two oil ducts by an oil duct, increased a radiating surface of high-tension coil.

3, the high-tension coil external diameter adopts half oil channel structure, has increased high-tension coil dielectric strength over the ground, and the mailbox size that can dwindle transformer, saves transformer oil.

4, because the surge voltage of 15KV is 125KV, high-tension coil is a drum type brake simultaneously, has bigger turn-to-turn voltage between coil turn, through calculating the electrostatic shielding that can cancel 35KV.

With reference to the insulation system of 10KV, 35KV, and through the end electric Field Calculation, design the 15KV end construction, this size has bigger minimizing than the end construction size of 35KV.If calculate to be 50/85 * 65=38mm by 35KV; It is 30/35 * 25=36mm that 10KV calculates; And the 15KV structure is 29mm.

More than a kind of high-power transformer that the utility model provided has been carried out detailed introduction.Used concrete example among this paper the execution mode of the utility model is set forth, the explanation of above embodiment just is used to help to understand the core concept of the utility model.Should be understood that; For those skilled in the art; Under the prerequisite that does not break away from the utility model principle, can also carry out some improvement and modification to the utility model, these improvement and modification also fall in the protection range of the utility model claim.

Claims

1. high-power transformer; It is characterized in that: comprise transformer housing, iron core, low-voltage coil winding and high-tension coil winding; Said iron core is located at enclosure interior, and said iron core middle column, left and right sides lateral column are provided with the low-voltage coil winding, and said low-voltage coil winding periphery is provided with the high-tension coil winding; Described high-tension coil winding adopts half oil channel structure; Between low-voltage coil winding outer wall and high-tension coil winding inwall, be provided with the insulation coaming plate, to form two oil ducts, described insulation coaming plate radial cross-section undulate; Between the outer wall of high-tension coil winding and transformer housing, also be provided with a circle insulation coaming plate, the upper and lower end parts of said insulation coaming plate is provided with soft corner-ring, and the inner edge of soft corner-ring is provided with and is used to insert the skirt section in the insulation coaming plate body.

2. a kind of high-power transformer according to claim 1 is characterized in that, said iron core is a core formula iron core.

3. a kind of high-power transformer according to claim 1 is characterized in that, described high-tension coil winding is a cartridge type.