CN114141502A - High-temperature-resistant environment-friendly transformer insulation system - Google Patents
High-temperature-resistant environment-friendly transformer insulation system Download PDFInfo
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- CN114141502A CN114141502A CN202111407337.0A CN202111407337A CN114141502A CN 114141502 A CN114141502 A CN 114141502A CN 202111407337 A CN202111407337 A CN 202111407337A CN 114141502 A CN114141502 A CN 114141502A
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- 238000009413 insulation Methods 0.000 title claims abstract description 102
- 230000001105 regulatory effect Effects 0.000 claims abstract description 57
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical group [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 claims abstract description 55
- 239000007787 solid Substances 0.000 claims abstract description 26
- 150000002148 esters Chemical class 0.000 claims abstract description 19
- 239000007788 liquid Substances 0.000 claims abstract description 14
- 230000004048 modification Effects 0.000 claims abstract description 8
- 238000012986 modification Methods 0.000 claims abstract description 8
- 238000004804 winding Methods 0.000 claims abstract description 7
- 238000007654 immersion Methods 0.000 claims abstract description 6
- 239000000123 paper Substances 0.000 claims description 51
- 229910052742 iron Inorganic materials 0.000 claims description 9
- 239000011087 paperboard Substances 0.000 claims description 7
- 229920002678 cellulose Polymers 0.000 claims description 6
- 239000001913 cellulose Substances 0.000 claims description 6
- 230000007613 environmental effect Effects 0.000 claims description 2
- 239000003921 oil Substances 0.000 description 33
- 239000012212 insulator Substances 0.000 description 12
- 230000002035 prolonged effect Effects 0.000 description 7
- 239000000463 material Substances 0.000 description 4
- 230000005684 electric field Effects 0.000 description 3
- 239000002480 mineral oil Substances 0.000 description 3
- 235000010446 mineral oil Nutrition 0.000 description 3
- 230000006835 compression Effects 0.000 description 2
- 238000007906 compression Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000006065 biodegradation reaction Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000002708 enhancing effect Effects 0.000 description 1
- 229910052500 inorganic mineral Inorganic materials 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 239000011707 mineral Substances 0.000 description 1
- 238000005065 mining Methods 0.000 description 1
- 230000008929 regeneration Effects 0.000 description 1
- 238000011069 regeneration method Methods 0.000 description 1
- 238000000926 separation method Methods 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
- H01F27/00—Details of transformers or inductances, in general
- H01F27/28—Coils; Windings; Conductive connections
- H01F27/32—Insulating of coils, windings, or parts thereof
- H01F27/323—Insulation between winding turns, between winding layers
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
- H01F27/00—Details of transformers or inductances, in general
- H01F27/08—Cooling; Ventilating
- H01F27/10—Liquid cooling
- H01F27/12—Oil cooling
- H01F27/14—Expansion chambers; Oil conservators; Gas cushions; Arrangements for purifying, drying, or filling
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
- H01F27/00—Details of transformers or inductances, in general
- H01F27/28—Coils; Windings; Conductive connections
- H01F27/32—Insulating of coils, windings, or parts thereof
- H01F27/324—Insulation between coil and core, between different winding sections, around the coil; Other insulation structures
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- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Insulating Of Coils (AREA)
Abstract
The invention provides a high-temperature-resistant environment-friendly transformer insulation system which comprises an oil tank, a transformer body, solid insulation and natural ester insulation oil. The transformer body is arranged in the oil tank and comprises an iron core, and a low-voltage coil, a high-voltage coil and a voltage regulating coil which are sequentially wound around the periphery of the iron core from inside to outside; the solid insulation comprises a first insulation paper tube annularly arranged between the iron core and the low-voltage coil, a second insulation paper tube annularly arranged between the low-voltage coil and the high-voltage coil, a third insulation paper tube annularly arranged between the high-voltage coil and the voltage regulating coil and a plurality of pieces of thermal modification paper, wherein the thermal modification paper is arranged among winding layers of the low-voltage coil, the high-voltage coil or the voltage regulating coil to be used as turn insulation; and the natural ester insulating oil is filled in the oil tank and is used for providing a liquid immersion environment and liquid insulation for the transformer body. The invention provides a high-temperature-resistant environment-friendly transformer insulation system, and aims to solve the technical problems that a traditional oil-immersed transformer is short in service life and low in transformer load capacity.
Description
Technical Field
The invention belongs to the technical field of transformer manufacturing, and particularly relates to a high-temperature-resistant environment-friendly transformer insulation system.
Background
The distribution transformer is one of important devices in power supply and distribution systems of industrial and mining enterprises and civil buildings, and comprises an oil-immersed transformer, wherein the oil-immersed transformer is formed by placing a transformer body consisting of an iron core and a winding in an oil tank filled with transformer oil.
The traditional oil-immersed transformer adopts mineral oil or synthetic oil as insulating liquid, but the mineral oil or the synthetic oil has the defects of non-regeneration and non-biodegradation, and easily causes pollution to land, water sources and the like when leakage occurs. The traditional oil-immersed transformer adopting mineral oil as insulating liquid has short service life, low load capacity and high use cost.
Disclosure of Invention
The embodiment of the invention provides a high-temperature-resistant environment-friendly transformer insulation system, and aims to solve the technical problems that a traditional oil-immersed transformer is short in service life and low in transformer load capacity.
In order to achieve the purpose, the invention adopts the technical scheme that: provided is a high temperature resistant environment-friendly transformer insulation system, including:
an oil tank;
the transformer body is arranged in the oil tank and comprises an iron core, and a low-voltage coil, a high-voltage coil and a voltage regulating coil which sequentially surround the iron core from inside to outside;
the solid insulation comprises a first insulation paper tube annularly arranged between the iron core and the low-voltage coil, a second insulation paper tube annularly arranged between the low-voltage coil and the high-voltage coil, a third insulation paper tube annularly arranged between the high-voltage coil and the voltage regulating coil and a plurality of pieces of thermal modification paper, wherein the thermal modification paper is arranged among winding layers of the low-voltage coil, the high-voltage coil or the voltage regulating coil to be used as turn insulation;
and the natural ester insulating oil is filled in the oil tank and is used for providing a liquid immersion environment and liquid insulation for the transformer body.
In one possible implementation, the second insulating paper cylinder is provided with a plurality of spaced and annular sleeves so as to separate oil gaps.
In a possible implementation manner, the first insulating paper tube, the second insulating paper tube and the third insulating paper tube are all made of cellulose insulating paper boards.
In one possible implementation, the cellulosic insulation board has a thickness in the range of 1mm to 2 mm. In a possible implementation mode, the solid insulation further comprises a pressing plate surrounding the iron core and an iron yoke insulation layer, the pressing plate is located on the low-voltage coil, the high-voltage coil and the upper portion of the pressure regulating coil, the iron yoke insulation layer is located on the low-voltage coil, the high-voltage coil and the lower portion of the pressure regulating coil, the low-voltage coil, the high-voltage coil and the pressure regulating coil are clamped between the pressing plate and the iron yoke insulation layer.
In a possible implementation manner, the solid insulator further includes a low-voltage upper end ring and a low-voltage lower end ring, the low-voltage upper end ring is disposed around the iron core, the low-voltage upper end ring is clamped between the pressing plate and the low-voltage coil, and the low-voltage lower end ring is clamped between the lower iron yoke insulator and the low-voltage coil.
In a possible implementation manner, the solid insulator further includes a first end ring, a second end ring, a voltage-regulating upper end ring and a voltage-regulating lower end ring, which are arranged around the iron core, wherein the voltage-regulating lower end ring is clamped between the lower iron yoke insulator and the voltage-regulating coil, and the first end ring, the second end ring and the voltage-regulating upper end ring are sequentially clamped between the pressing plate and the voltage-regulating coil from top to bottom;
a voltage regulating head end angle ring arranged around the iron core is clamped between the first end ring and the second end ring, and a voltage regulating head end reverse angle ring arranged around the iron core is clamped between the second end ring and the voltage regulating upper end ring; and a first angle ring is arranged on the inner diameter side of the first cake at the upper end of the pressure regulating coil.
In a possible implementation manner, the solid insulator further includes a third end ring, a high-voltage upper end ring and a high-voltage lower end ring, the third end ring, the high-voltage upper end ring and the high-voltage lower end ring are arranged around the iron core, the high-voltage lower end ring is clamped between the lower iron yoke insulator and the high-voltage coil, the high-voltage upper end ring is located at the upper portion of the high-voltage coil, the third end ring is arranged at the upper portions of the first end ring and the high-voltage upper end ring along the radial direction of the iron core, and is clamped between the pressing plate, the first end ring and the high-voltage upper end ring along the axial direction of the iron core;
and a high-voltage head end angle ring surrounding the iron core is clamped between the third end ring and the high-voltage upper end ring, and second angle rings are arranged on the inner diameter sides of the head and tail cakes of the high-voltage coil.
The high-temperature-resistant environment-friendly transformer insulation system provided by the invention has the beneficial effects that: compared with the prior art, the low-voltage coil, the high-voltage coil and the voltage regulating coil are sequentially arranged on the periphery of the iron core from inside to outside, and the thermal modified paper is arranged among the winding layers of the low-voltage coil, the high-voltage coil or the voltage regulating coil, so that the heat resistance of the transformer is improved, and the service life of the insulating paper is prolonged, so that the insulating life of the transformer is prolonged. A first insulating paper tube is arranged between the iron core and the low-voltage coil, a second insulating paper tube is arranged between the low-voltage coil and the high-voltage coil, and a third insulating paper tube is arranged between the high-voltage coil and the voltage regulating coil, so that the insulating strength of the transformer is improved. The natural ester insulating oil is arranged to provide a liquid immersion environment for solid insulation, and meanwhile, the natural ester insulating oil also forms liquid insulation, so that a high-temperature-resistant and environment-friendly transformer insulating system is formed between the natural ester insulating oil and the solid insulation, the insulating life of the transformer is prolonged, the load capacity of the transformer is enhanced, and the practicability is high.
Drawings
Fig. 1 is a schematic structural diagram of an insulation system of a high temperature resistant environment-friendly transformer according to an embodiment of the present invention;
fig. 2 is a schematic view of a solid insulation structure of an insulation system of a high temperature resistant environment-friendly transformer according to an embodiment of the present invention.
Description of reference numerals: 10. a body; 11. a low-voltage coil; 12. a high-voltage coil; 13. a voltage regulating coil; 20. solid insulation; 21. a first insulating paper tube; 22. a second insulating paper tube; 23. a third insulating paper tube; 24. pressing a plate; 25. insulating a lower iron yoke; 26. a low voltage upper end ring; 27. pressing the end ring at low pressure; 28. a first end ring; 29. a second end ring; 210. adjusting the upper end ring; 211. adjusting the lower end ring; 212. a pressure regulating head end angle ring; 213. a voltage regulating head end reverse angle ring; 214. a first angle ring; 215. a third end ring; 216. a high-voltage upper end ring; 217. a high pressure lower end ring; 218. a high pressure head end angle ring; 219. a second corner ring; 30. natural ester insulating oil; 40. and an oil tank.
Detailed Description
In order to make the technical problems, technical solutions and advantageous effects to be solved by the present invention more clearly apparent, the present invention is further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.
It should be noted that the terms "length," "width," "height," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "head," "tail," and the like, indicate orientations or positional relationships that are based on the orientations or positional relationships illustrated in the drawings, are used for convenience in describing the invention and for simplicity in description, and do not indicate or imply that the referenced devices or elements must have a particular orientation, be constructed in a particular orientation, and be operated, and therefore should not be construed as limiting the invention.
It is also noted that, unless expressly stated or limited otherwise, the terms "mounted," "connected," "secured," "disposed," and the like are intended to be inclusive and mean, for example, that they may be fixedly connected, detachably connected, or integrally formed; can be mechanically or electrically connected; either directly or indirectly through intervening media, either internally or in any other suitable relationship. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.
Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. Further, "plurality" or "a plurality" means two or more unless specifically limited otherwise.
Referring to fig. 1 and fig. 2, the insulation system of the high temperature resistant environment-friendly transformer of the present invention will be described. The high-temperature-resistant environment-friendly transformer insulation system comprises an oil tank 40, a transformer body 10, solid insulation 20 and natural ester insulation oil 30.
The body 10 is disposed in the oil tank 40, and the body 10 includes an iron core, a low-voltage coil 11, a high-voltage coil 12, and a voltage-regulating coil 13. The low-voltage coil 11, the high-voltage coil 12 and the voltage-regulating coil 13 are sequentially wound around the outer periphery of the core from inside to outside.
The solid insulation 20 comprises a first insulation paper cylinder 21, a second insulation paper cylinder 22, a third insulation paper cylinder 23 and a plurality of thermal modification papers. A first insulating paper sleeve 21 is provided around the core and the low voltage coil 11. A second insulating paper cartridge ring 22 is provided between the low voltage coil 11 and the high voltage coil 12. A third insulating paper tube 23 is annularly provided between the high voltage coil 12 and the voltage regulating coil 13. The thermally modified paper is arranged between the winding layers of the low-voltage coil 11, the high-voltage coil 12 or the voltage regulating coil 13, and is used as a turn insulation.
The natural ester insulating oil 30 is filled in the oil tank 40 for providing a liquid immersion environment and liquid insulation to the vessel body 10.
Compared with the prior art, the high-temperature-resistant environment-friendly transformer insulation system provided by the embodiment of the invention has the advantages that the low-voltage coil, the high-voltage coil and the voltage regulating coil are sequentially arranged on the periphery of the iron core from inside to outside, and the thermal modified paper is arranged among the winding layers of the low-voltage coil, the high-voltage coil or the voltage regulating coil, so that the heat resistance of the transformer is improved, the service life of the insulation paper is prolonged, and the insulation life of the transformer is prolonged. A first insulating paper tube is arranged between the iron core and the low-voltage coil, a second insulating paper tube is arranged between the low-voltage coil and the high-voltage coil, and a third insulating paper tube is arranged between the high-voltage coil and the voltage regulating coil, so that the insulating strength of the transformer is improved. The natural ester insulating oil is arranged to provide a liquid immersion environment for solid insulation, and meanwhile, the natural ester insulating oil also forms liquid insulation, so that a high-temperature-resistant and environment-friendly transformer insulating system is formed between the natural ester insulating oil and the solid insulation, the insulating life of the transformer is prolonged, the load capacity of the transformer is enhanced, and the practicability is high.
In some embodiments, the solid insulation 20 is immersed in the natural ester insulating oil 30 such that the solid insulation 20 and the natural ester insulating oil 30 collectively constitute a high temperature resistant, environmentally friendly transformer insulation system. Under the same hot spot temperature condition, the relative material life of the insulation system formed by matching the mineral insulating oil and the thermal modified paper is 1, while the relative material life of the insulation system formed by combining the natural ester insulating oil 30 and the thermal modified paper is 7.398, and the natural ester insulating oil 30 can prolong the service life of the insulating paper, thereby prolonging the insulation life of the transformer. The natural ester insulating oil 30 has the characteristics of being renewable and biodegradable, and the ignition point of the natural ester insulating oil 30 is high, so that the high temperature resistance, the environmental protection property and the fire safety of the transformer can be obviously improved, and the load capacity of the transformer can be improved.
In some embodiments, referring to fig. 2, the second insulating paper cylinder 22 has a plurality of spaced and looped sleeves, thereby functioning as oil gap separation. In this embodiment, a plurality of second insulating paper cylinders 22 are provided to separate oil gaps, so as to extend the creepage distance from the high-voltage coil 12 to the low-voltage coil 11, thereby improving the insulating strength of the transformer.
In some embodiments, referring to fig. 2, three second insulating paper cylinders 22 are provided.
In some embodiments, referring to fig. 2, the first insulating paper cylinder 21, the second insulating paper cylinder 22 and the third insulating paper cylinder 23 are made of cellulose insulating paperboard. In this embodiment, the first insulating paper tube 21, the second insulating paper tube 22, and the third insulating paper tube 23 all use cellulose insulating paper boards, which can improve the insulating strength of the transformer.
In some embodiments, the cellulosic insulation board has a thickness in the range of 1mm to 2 mm.
In some embodiments, referring to fig. 2, the solid insulation 20 further comprises a platen 24 and a lower yoke insulation 25. The press plate 24 is disposed around the core, and the press plate 24 is located at the upper portions of the low voltage coil 11, the high voltage coil 12, and the regulator coil 13, and the lower yoke insulation 25 is located at the lower portions of the low voltage coil 11, the high voltage coil 12, and the regulator coil 13. The low-voltage coil 11, the high-voltage coil 12, and the voltage regulating coil 13 are sandwiched between the pressure plate 24 and the lower yoke insulator 25. In this embodiment, the low-voltage coil 11, the high-voltage coil 12, and the voltage regulating coil 13 are pressed and fixed by the pressing plate 24 and the lower yoke insulator 25, so that the insulating effect of the low-voltage coil 11, the high-voltage coil 12, and the voltage regulating coil 13 is ensured.
In some embodiments, referring to fig. 2, the solid insulation 20 of the insulation system of the high temperature resistant transformer in the embodiments of the present invention further includes a low voltage upper end coil 26 and a low voltage lower end coil 27. The low voltage upper end coil 26 is sandwiched between the pressure plate 24 and the low voltage coil 11. The low-voltage lower end coil 27 is sandwiched and disposed between the lower yoke insulator 25 and the low-voltage coil 11. In this embodiment, a low-voltage upper end ring 26 is provided between the pressure plate 24 and the low-voltage coil 11, and a low-voltage lower end ring 27 is provided between the lower yoke insulation 25 and the low-voltage coil 11, thereby ensuring reliable compression of the low-voltage coil 11.
In some embodiments, referring to fig. 2, the solid insulator 20 of the insulation system of the high temperature resistant transformer in the embodiments of the present invention further includes a first end coil 28, a second end coil 29, a voltage-regulating upper end coil 210, and a voltage-regulating lower end coil 211 disposed around the iron core. The lower end ring 211 of the voltage regulating is clamped between the lower yoke insulation 25 and the voltage regulating coil 13, and the first end ring 28, the second end ring 29 and the upper end ring 210 of the voltage regulating are clamped between the pressure plate 24 and the voltage regulating coil 13 from top to bottom in sequence.
Wherein, a pressure regulating head end angle ring 212 is clamped between the first end ring 28 and the second end ring 29, and the pressure regulating head end angle ring 212 is arranged around the iron core. A voltage regulating head end reverse angle ring 213 is clamped between the second end ring 29 and the voltage regulating upper end ring 210, and the voltage regulating head end reverse angle ring 213 is arranged around the iron core. The inner diameter side of the upper end head cake of the pressure regulating coil 13 is provided with a first angle ring 214.
The coil protection angle ring is one of main insulation of the transformer, is divided into a positive angle ring and a negative angle ring, and is mainly used for improving electric field distribution between the end part of a coil and a key wire cake, enhancing the insulation strength of the coil and preventing creepage along the edge of the main insulation and the wire cake. Wherein, the positive angle ring is arranged on the inner diameter side of the wire cake, and the negative angle ring is arranged on the outer diameter side of the wire cake.
In this embodiment, the first end ring 28, the second end ring 29 and the voltage-regulating upper end ring 210 are clamped between the pressure plate 24 and the voltage-regulating coil 13, the first end ring 28, the second end ring 29 and the voltage-regulating upper end ring 210 are sequentially arranged from top to bottom, and the voltage-regulating lower end ring 211 is arranged between the lower yoke insulation 25 and the voltage-regulating coil 13, so as to ensure that the voltage-regulating coil 13 is reliably pressed.
The pressure regulating head end angle ring 212 arranged around the iron core is clamped between the first end ring 28 and the second end ring 29, the pressure regulating head end angle ring 213 arranged around the iron core is clamped between the second end ring 29 and the pressure regulating upper end ring 210, and the pressure regulating head end angle ring 212 and the pressure regulating head end angle ring 213 play a role in separating an oil gap and improving the insulation strength, so that the creepage distance between the high-voltage coil 12 and the pressure regulating coil 13 is prolonged.
A first angle ring 214 is arranged on the inner diameter side of the upper end head cake of the voltage regulating coil 13, and the first angle ring 214 is used for improving the electric field distribution of the coil end.
In some embodiments, the first corner ring 214 has a thickness in the range of 0.5mm to 1 mm.
In some embodiments, the first corner ring 214 is a cellulose insulating paperboard material.
In some embodiments, referring to fig. 2, the solid insulation 20 of the insulation system of the high temperature resistant transformer in accordance with the present invention further includes a third end ring 215, a high voltage upper end ring 216, and a high voltage lower end ring 217. The third coil 215 is disposed around the core. The high-voltage lower end coil 217 is sandwiched between the lower yoke insulator 25 and the high-voltage coil 12. The high voltage upper end coil 216 is located above the high voltage coil 12. The third end ring 215 is disposed between the first end ring 28 and the high-voltage upper end ring 216 in the core radial direction, and is sandwiched between the pressure plate 24, the first end ring 28, and the high-voltage upper end ring 216 in the core axial direction.
A high-pressure head end angle ring 218 is clamped between the third end ring 215 and the high-pressure upper end ring 216, and the high-pressure head end angle ring 218 is arranged around the iron core. The inner diameter sides of the head and tail cakes of the high-voltage coil 12 are provided with second angle rings 219.
In this embodiment, a high-voltage lower end ring 217 is disposed between the lower yoke insulator 25 and the high-voltage coil 12, a high-voltage upper end ring 216 is disposed on the upper portion of the high-voltage coil 12, and a third end ring 215 is disposed between the pressing plate 24, the first end ring 28, and the high-voltage upper end ring 216 in a clamping manner, so as to ensure reliable compression of the high-voltage coil 12.
A high-voltage head end angle ring 218 disposed around the core is sandwiched between the third end ring 215 and the high-voltage upper end ring 216, and the high-voltage head end angle ring 218 serves to separate an oil gap and improve insulation strength. The inner diameter sides of the head and tail cakes of the high-voltage coil 12 are respectively provided with a second angle ring 219, and the second angle rings 219 are used for improving the electric field distribution of the coil end.
In some embodiments, the second angular ring 219 has a thickness in the range of 0.5mm to 1 mm.
In some embodiments, the second corner ring 219 is a cellulose insulating paperboard material.
The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the invention, and any modifications, equivalents and improvements made within the spirit and principle of the present invention are intended to be included within the scope of the present invention.
Claims (8)
1. The utility model provides a high temperature resistant environmental protection transformer insulation system which characterized in that includes:
an oil tank;
the transformer body is arranged in the oil tank and comprises an iron core, and a low-voltage coil, a high-voltage coil and a voltage regulating coil which sequentially surround the iron core from inside to outside;
the solid insulation comprises a first insulation paper tube annularly arranged between the iron core and the low-voltage coil, a second insulation paper tube annularly arranged between the low-voltage coil and the high-voltage coil, a third insulation paper tube annularly arranged between the high-voltage coil and the voltage regulating coil and a plurality of pieces of thermal modification paper, wherein the thermal modification paper is arranged among winding layers of the low-voltage coil, the high-voltage coil or the voltage regulating coil to be used as turn insulation;
and the natural ester insulating oil is filled in the oil tank and is used for providing a liquid immersion environment and liquid insulation for the transformer body.
2. The high temperature resistant environmentally friendly transformer insulation system of claim 1 wherein said second insulating paper cylinder has a plurality of spaced and looped sleeves for separating oil gaps.
3. The high temperature resistant environment-friendly transformer insulation system of claim 2, wherein the first insulation paper cylinder, the second insulation paper cylinder and the third insulation paper cylinder are all made of cellulose insulation paper boards.
4. The high temperature resistant environmentally friendly transformer insulation system of claim 3, wherein the cellulosic insulation paperboard has a thickness in the range of 1mm to 2 mm.
5. The high temperature resistant environmentally friendly transformer insulation system of claim 1 wherein said solid insulation further comprises a clamp plate disposed around the core and a lower yoke insulation, said clamp plate being located above said low voltage coil, said high voltage coil and said voltage regulator coil, said lower yoke insulation being located below said low voltage coil, said high voltage coil and said voltage regulator coil, said low voltage coil, said high voltage coil and said voltage regulator coil being sandwiched between said clamp plate and said lower yoke insulation.
6. The high temperature resistant environmentally friendly transformer insulation system of claim 5, wherein the solid insulation further comprises a low voltage upper end ring and a low voltage lower end ring disposed around the core, the low voltage upper end ring is sandwiched between the platen and the low voltage coil, and the low voltage lower end ring is sandwiched between the lower yoke insulation and the low voltage coil.
7. The high temperature resistant environment-friendly transformer insulation system of claim 6, wherein the solid insulation further comprises a first end ring, a second end ring, a voltage regulating upper end ring and a voltage regulating lower end ring arranged around the iron core, the voltage regulating lower end ring is clamped between the lower iron yoke insulation and the voltage regulating coil, and the first end ring, the second end ring and the voltage regulating upper end ring are sequentially clamped between the pressure plate and the voltage regulating coil from top to bottom;
a voltage regulating head end angle ring arranged around the iron core is clamped between the first end ring and the second end ring, and a voltage regulating head end reverse angle ring arranged around the iron core is clamped between the second end ring and the voltage regulating upper end ring; and a first angle ring is arranged on the inner diameter side of the first cake at the upper end of the pressure regulating coil.
8. The high temperature resistant environment-friendly transformer insulation system of claim 7, wherein the solid insulation further comprises a third end ring, a high voltage upper end ring and a high voltage lower end ring, the third end ring, the high voltage lower end ring and the high voltage upper end ring are arranged around the iron core, the high voltage lower end ring is clamped between the lower iron yoke insulation and the high voltage coil, the high voltage upper end ring is located at the upper part of the high voltage coil, the third end ring is arranged at the upper parts of the first end ring and the high voltage upper end ring along the radial direction of the iron core, and is clamped between the pressing plate, the first end ring and the high voltage upper end ring along the axial direction of the iron core;
and a high-voltage head end angle ring surrounding the iron core is clamped between the third end ring and the high-voltage upper end ring, and second angle rings are arranged on the inner diameter sides of the head and tail cakes of the high-voltage coil.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN202111407337.0A CN114141502B (en) | 2021-11-24 | 2021-11-24 | High-temperature-resistant environment-friendly transformer insulation system |
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| CN202111407337.0A CN114141502B (en) | 2021-11-24 | 2021-11-24 | High-temperature-resistant environment-friendly transformer insulation system |
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| CN114141502A true CN114141502A (en) | 2022-03-04 |
| CN114141502B CN114141502B (en) | 2024-07-02 |
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| CN111863407A (en) * | 2020-08-18 | 2020-10-30 | 中铁二院工程集团有限责任公司 | 110kV high-overload traction transformer insulation structure applied to electrified railway |
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