A UHV transformer with conformal insulation structure

Abstract

This invention discloses an ultra-high voltage transformer with a conformal insulation structure, comprising: two side columns, two main columns disposed between the side columns, and coils wound on the main columns. Insulating cylinders are disposed on the outer side of the coils. The oil gap size between two adjacent integral insulating cylinders is the same; the oil gap size between two adjacent notched insulating cylinders is the same; two adjacent conformal insulating cylinders form conformal oil gaps, the size of which increases from the side closer to the main column to the side farther away from the main column, with the size of the conformal oil gap closer to the other main column being smaller than the size of the conformal oil gap closer to the tank. In this invention, the shape of each layer of insulating paperboard outside the high-voltage coil and each layer of insulating paperboard outside the side columns is adapted as closely as possible to the equipotential lines of the electric field, resulting in a more rational structure and higher insulation reliability. Eliminating the insulating paperboard on the tank wall reduces the use of insulating screws and also reduces the risk of partial discharge problems or even through-discharge accidents caused by insulating screws.

Description

Technical Field

[0001] This invention relates to the field of transformer insulation, and in particular to an ultra-high voltage transformer with a conformal insulation structure. Background Technology

[0002] my country's 1000kV ultra-high voltage (UHV) transmission network has become the backbone of the power grid system. The 1000kV transformers, 1100kV reactors, and test transformers used in UHV transmission lines all have rated voltages exceeding 1000kV. The insulation structure of these products directly determines their reliability and ensures safe and reliable operation throughout their lifespan. Currently, the insulation structure between the high-voltage coil and the side column, and between the high-voltage coil and the tank wall of most UHV transformers, reactors, and UHV test transformers employs a multi-layered cardboard tube surrounding the high-voltage coil to divide the oil gap. The side column is also surrounded by multiple layers of insulating cardboard to divide the oil gap, with each layer of oil gap having the same size. Insulating cardboard is also hung on the tank wall, and a phase separator is placed between the high-voltage coil and the side column.

[0003] However, such insulation structures present some problems in ultra-high voltage transformers. The insulation is relatively weak and prone to partial discharge, even leading to serious quality accidents such as penetrating discharge points along the insulating screws. The insulating boards on the tank walls need to be dried separately and then installed on the tank walls during product assembly. On the one hand, because the insulating paperboards on the tank walls are very large, they are prone to deformation during drying, resulting in severe deformation of the insulating oil gaps after assembly, which has a significant impact on the electric field distribution. On the other hand, it affects the assembly time, increasing the exposure time of the transformer body. It is necessary to strengthen subsequent process treatment to solve the problem of moisture absorption by the transformer body. If the treatment is not thorough, it will cause product quality problems. Summary of the Invention

[0004] This invention overcomes the weakness of the insulation system in existing high-voltage transformers and provides an ultra-high voltage transformer with a conformal insulation structure. To achieve the above objective, the technical solution adopted by this invention is as follows: an ultra-high voltage transformer with a conformal insulation structure, comprising: two side columns, two main columns disposed between the side columns, and a coil wound on the main columns. An insulating cylinder is disposed on the outside of the coil, and the insulating cylinder consists of several integral insulating cylinders, several notched insulating cylinders, and several conformal insulating cylinders from the inside out.

[0005] The oil gap size between two adjacent integral insulating cylinders is the same; the oil gap size between two adjacent notched insulating cylinders is the same, and the notch width of the outer notched insulating cylinder is not less than the notch width of the inner notched insulating cylinder; two adjacent conformal insulating cylinders form a conformal oil gap, and the size of the adjacent conformal oil gap increases from the side closer to the main column to the side farther from the main column, and the size of the conformal oil gap closer to the other main column is smaller than the size of the conformal oil gap closer to the oil tank.

[0006] In a preferred embodiment of the present invention, a support strip curtain is provided between two adjacent insulating cylinders. The support strip curtain includes a plurality of parallel support strips and a plurality of insulating strips that are fixedly connected to all the support strips in sequence. The insulating strips are perpendicular to the support strips. A groove is provided on the support strips where they intersect with the insulating strips. The insulating paper strip is adhered to the support strips at the groove.

[0007] In a preferred embodiment of the present invention, the support strip curtain is provided with a limiting groove that matches the outlet corner ring.

[0008] In a preferred embodiment of the present invention, a support plate and a support insulating end ring are arranged sequentially from top to bottom on the bottom of the insulating cylinder. The support insulating end ring includes a plurality of pads and paper rings disposed on the pads. The pads are evenly arranged circumferentially.

[0009] In a preferred embodiment of the present invention, the pad is divided into a normal pad, a shortened pad, and a support pad. The shortened pad is disposed between the main column and another main column and between the main column and the side column. The support pad is disposed on the high-voltage side and the low-voltage side of the coil.

[0010] In a preferred embodiment of the present invention, the support pad is divided into several rectangular pads and several L-shaped pads. The rectangular pads, the L-shaped pads and the normal pads are arranged at intervals. The L-shaped pad includes a straight section and a vertical section fixed to one end of the straight section. The side of the vertical section near the coil is provided with several protrusions corresponding to the limiting blocks of the support plate.

[0011] In a preferred embodiment of the present invention, the support plate is provided with a plurality of hollow grooves, and the outer surface of the support plate is provided with a plurality of limiting blocks.

[0012] In a preferred embodiment of the present invention, a phase spacer is provided between the main column and the side column.

[0013] In a preferred embodiment of the present invention, the surface of the side column is provided with a ground screen, a surrounding screen, and a conformal cardboard from the inside out, wherein the ground screen, the surrounding screen, and the conformal cardboard all cover at least the side of the side column closest to the main column.

[0014] This invention addresses the shortcomings of the prior art and has the following beneficial effects:

[0015] The conformal insulation structure for ultra-high voltage transformers of this invention is based on electric field simulation calculations of ultra-high voltage transformers. The shape of each layer of insulating paperboard outside the high-voltage coil and each layer of insulating paperboard outside the side columns is designed to closely match the equipotential lines of the electric field, resulting in a more rational structure and higher insulation reliability. Eliminating the insulating paperboard on the tank walls reduces the use of insulating screws and also reduces the risk of partial discharge problems or even through-discharge accidents caused by insulating screws. Attached Figure Description

[0016] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other embodiments can be obtained from these drawings without creative effort.

[0017] Figure 1 This is a schematic diagram of the core arrangement of an ultra-high voltage transformer with conformal insulation structure according to an embodiment of the present invention;

[0018] Figure 2 for Figure 1 Enlarged view of section X in the middle;

[0019] Figure 3 for Figure 1 Enlarged view of the Y-section in the middle;

[0020] Figure 4 This is a schematic diagram of the insulation cylinder arrangement of an ultra-high voltage transformer with a conformal insulation structure according to one embodiment of the present invention;

[0021] Figure 5 This is a cross-sectional view of one of the main columns of an ultra-high voltage transformer with conformal insulation structure according to an embodiment of the present invention;

[0022] Figure 6 for Figure 5 A schematic diagram of the Z part in the diagram;

[0023] Figure 7 A schematic diagram of the unfolded integral insulation cylinder of an ultra-high voltage transformer with a conformal insulation structure according to an embodiment of the present invention;

[0024] Figure 8 This is a schematic diagram of a support curtain for an ultra-high voltage transformer with a conformal insulation structure according to an embodiment of the present invention;

[0025] Figure 9 This is a schematic diagram of a support bar for an ultra-high voltage transformer with a conformal insulation structure according to an embodiment of the present invention;

[0026] Figure 10This is a schematic diagram of the segmented support bars of an ultra-high voltage transformer with conformal insulation structure according to an embodiment of the present invention;

[0027] Figure 11 This is a schematic diagram of the supporting insulating end ring of an ultra-high voltage transformer with a conformal insulation structure according to an embodiment of the present invention;

[0028] Figure 12 for Figure 11 AA section view in the middle;

[0029] Figure 13 for Figure 11 BB section view in the middle;

[0030] Figure 14 for Figure 11 CC section view in the middle;

[0031] Figure 15 for Figure 11 DD section view in the middle;

[0032] Figure 16 This is a schematic diagram of a support plate for an ultra-high voltage transformer with a conformal insulation structure according to an embodiment of the present invention.

[0033] The following are the annotations in the attached diagram: 101, Side column; 102, Main column; 103, Coil; 20, Insulating cylinder; 201, Integral insulating cylinder; 2011, Outlet; 202, Notched insulating cylinder; 203, Conformal insulating cylinder; 30, Support strip curtain; 301, Support strip; 302, Segmented support strip; 303, Insulating paper tape; 304, Corner ring; 305, Limiting slot; 40, Supporting insulating end ring; 401, Normal pad; 402, Shortened pad; 403, Rectangular pad; 404, L-shaped pad; 405, Paper ring; 406, Anti-cracking screw; 50, Support plate; 501, Hollowed-out groove; 502, Limiting block; 701, Ground screen; 702, Enclosure screen; 703, Conformal cardboard; 801, Phase partition. Detailed Implementation

[0034] To better understand the above-mentioned objectives, features, and advantages of the present invention, the present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments. These drawings are simplified schematic diagrams, which only illustrate the basic structure of the present invention in a schematic manner. Therefore, they only show the components related to the present invention. It should be noted that, unless otherwise specified, the embodiments and features in the embodiments of this application can be combined with each other.

[0035] In the description of this application, it should be understood that the terms "center," "longitudinal," "lateral," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," and "outer," etc., indicating orientation or positional relationships based on the orientation or positional relationships shown in the accompanying drawings, are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as limiting the scope of protection of this application. Furthermore, the terms "first," "second," etc., are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Therefore, features defined with "first," "second," etc., may explicitly or implicitly include one or more of that feature. In the description of this invention, unless otherwise stated, "a plurality of" means two or more.

[0036] In the description of this application, it should be noted that, unless otherwise expressly specified and limited, the terms "installation," "connection," and "linking" should be interpreted broadly. For example, they can refer to fixed connections, detachable connections, or integral connections; they can refer to mechanical connections or electrical connections; they can refer to direct connections or indirect connections through an intermediate medium; and they can refer to the internal communication between two components. Those skilled in the art will understand the specific meaning of the above terms in this application based on the specific circumstances.

[0037] To facilitate understanding of the present invention, a more complete description will be given below with reference to the accompanying drawings. Preferred embodiments of the invention are shown in the drawings. However, the invention can be implemented in many different forms and is not limited to the embodiments described herein. Rather, these embodiments are provided to provide a thorough and complete understanding of the disclosure of the invention.

[0038] like Figure 1-2 As shown, an ultra-high voltage transformer with a conformal insulation structure includes: two side columns 101, two main columns 102 disposed between the side columns 101, and a coil 103 wound on the main columns 102. An insulating cylinder 20 is disposed on the outside of the coil 103. The insulating cylinder 20 consists of several integral insulating cylinders 201, several notched insulating cylinders 202, and several conformal insulating cylinders 203 arranged from the inside to the outside.

[0039] like Figure 2 and Figure 4-5As shown, the oil gap size between two adjacent integral insulating cylinders 201 is the same; the oil gap size between two adjacent notched insulating cylinders 202 is the same, and the notch width of the outer notched insulating cylinder 202 is not less than the notch width of the inner notched insulating cylinder 202; two adjacent conformal insulating cylinders 203 form conformal oil gaps, and the size of the adjacent conformal oil gaps increases from the side closer to the main column 102 to the side farther from the main column 102, and the size of the conformal oil gap closer to another main column 102 or side column 101 is smaller than the size of the conformal oil gap closer to the oil tank.

[0040] like Figure 2 and Figure 4 The present invention discloses that in the insulation structure of a high-voltage transformer, the insulation cylinder 20 is divided into an integral insulation cylinder 201, a notched insulation cylinder 202, and a conformal insulation cylinder 203. Specifically, the integral insulation cylinder 201 comprises multiple layers and is disposed outside the high-voltage coil 103. It is formed by multiple sheets of 1.5mm thick cardboard forming a complete circle. The integral insulation cylinder 201 has an outlet 2011 at the corresponding position of the coil 103, and the oil gap size between two adjacent integral insulation cylinders 201 is the same.

[0041] like Figure 2 and Figure 4 As shown, the notched insulating cylinder 202 also has multiple layers, which are set on the outside of the integral insulating cylinder 201. The notched insulating cylinder 202 has a notch in the part near the two main columns 102, and the insulating paperboard near the other main column is removed. Otherwise, it is the same as the integral insulating cylinder 201.

[0042] Continue to refer to Figure 2 and Figure 4 As shown, the conformal insulating cylinder 203 comprises multiple layers, which are disposed outside the notched insulating cylinder 202. The size of the oil gap in each layer of the conformal insulating cylinder 203 is different, and the size of the oil gap in the same layer but at different locations is also different. (Refer to...) Figure 4 As shown, the oil gap between two adjacent conformal insulating cylinders 203 has a smaller size at the position between the main column 102 and other main columns 102, and a larger size between the oil gap and the high and low voltage tank walls. The number of cardboard layers between the high voltage coil 103 and the high and low voltage side tank walls of the conformal insulating cylinder 203 is more than the number of cardboard layers between the high voltage coil 103 and the side column 101. The insulating cardboard in the phase-interval areas between the two main columns 102 and between the main column 102 and the side column 101 is conformally arranged according to the electric field distribution, dividing the large oil gap between the two main columns 102 and between the main column 102 and the side column 101 into smaller oil gaps.

[0043] like Figure 5As shown, in one embodiment of the present invention, the insulating cardboard at the coil 103 outlet of the first 5 layers of insulating cylinder 20 near the coil 103 has an outlet hole according to the coil 103 outlet size or the outlet corner ring 304 size. The outlet of the coil 103 in the middle of the fifth layer of outer insulating cylinder 20 has an outlet hole according to the outlet insulation outer diameter size. The opening size at the upper and lower outlets of the coil 103 is determined after fully considering the operating space for wrapping insulation when the lead wire of the device is connected.

[0044] Reference Figure 8-9 As shown, a support curtain 30 is provided between two adjacent insulating cylinders 20. The support curtain 30 includes several parallel support strips 301 and several insulating strips that are fixedly connected to all the support strips 301 in sequence. The insulating strips are perpendicular to the support strips 301. A groove is provided on the support strips 301 where they intersect with the insulating strips. The insulating paper strip 303 is bonded to the support strips 301 at the groove.

[0045] Specifically, in this invention, the oil gaps are divided between the insulating cylinders 20 using support strips 301. In the area where the coil 103 protrudes on the high-voltage side, the oil gaps are divided using support strip curtains 30. The position of the coil 103 protrusion is occupied by segmented support strips 302, avoiding the coil 103 protrusion and the coil 103 protrusion corner ring 304. Each support strip 301 has two slots in the vertical direction, and the slot positions are the same for the same layer of oil gap. A 2mm thick insulating paper tape 303 is placed in the slots. Support strip curtains 30 with a thickness of less than 20mm are used. The support strips 301 and insulating paper tape 303 are bonded together using casein glue, ultra-high voltage special PVA, etc. When the thickness of the support strip 301 is greater than 20mm, the support strips 301 and insulating paper tape 303 are bonded together during assembly.

[0046] All support strips 301 in this invention are made of T4 cardboard or T4 laminated cardboard. Each layer of integral insulating tube 201 is bound with sealing paper. The notched insulating tube 202 and conformal insulating tube 203 are bound with PET tape. Each layer of insulating tube 20 is bound at least twice, at the top and bottom. The binding position is not less than 600mm from the middle of the coil 103. The conformal cardboard 703 outside the side column 101 is also bound with PET tape. The binding position is at the same binding height as the conformal insulating tube 203 of the main column 102.

[0047] Reference Figures 5-10 As shown, in one embodiment of the present invention, the support curtain 30 is provided with a limiting slot 305 that matches the outlet corner ring 304. The support curtain 30 cooperates with the outlet corner ring 304, and the limiting slot 305 is fixed to the bottom of the outlet corner ring 304 to fix the outlet corner ring 304.

[0048] like Figure 5As shown, from top to bottom, the insulating cylinder 20 is provided with a support plate 50 and a support insulating end ring 40. The support insulating end ring 40 includes several pads and paper rings 405 disposed on the pads. The pads are evenly arranged circumferentially.

[0049] like Figure 11-15 As shown, the pads are divided into normal pads 401, shortened pads 402, and support pads 403 and 404. The shortened pad 402 is disposed between the main post 102 and another main post 102, and the length of the shortened pad 402 is less than the length of the normal pad 401. The support pads are disposed on the high-voltage side and the low-voltage side of the coil 103, and the length of the support pads is greater than the length of the normal pad 401, and the thickness of the support pads is greater than the thickness of the normal pad 401.

[0050] Specifically, the supporting insulating end ring 40 consists of a 3mm thick insulating paper ring 405 and spacers, with the spacers evenly distributed around the circumference according to the number of taps in the transformer coil 103. For example... Figure 11-13 As shown, the shortening pad 402 is set between the two main columns 102 and at the port between the main column 102 and the side column 101. Its length is appropriately shortened compared with the normal pad 401 to avoid the position of the shortening pad 402 interfering with other components.

[0051] like Figure 11 as well as Figure 14-15 As shown, the support pad is divided into several rectangular pads 403 and several L-shaped pads 404. The rectangular pads 403, L-shaped pads 404 and normal pads 401 are arranged at intervals. The L-shaped pad 404 includes a straight section and a vertical section fixed to one end of the straight section. The side of the vertical section near the coil 103 is provided with several protrusions corresponding to the limiting blocks 502 of the support plate 50.

[0052] Specifically, the supporting insulating end ring 40 has eight elongated and thickened supporting pads on both the high-voltage and low-voltage sides. Four of these are rectangular pads 403, and four are L-shaped pads 404. The L-shaped pads 404 are longer, with a partial protrusion on the extended portion to engage with the limiting protrusions of the supporting plate 50. Because the protrusions are relatively small, to prevent them from detaching under stress, two anti-cracking bolts 406 are provided on the protrusions of each pad to enhance strength. In one embodiment of the invention, the supporting pads maintain a distance of at least approximately 100 mm from the tank wall to facilitate the entry of the device body into the tank.

[0053] like Figure 11As shown, all the pads are arranged symmetrically in the vertical and horizontal directions. In one embodiment of the present invention, the unmarked pads are normal pads 401, those marked with "x" are shortened pads 402, those marked with "@" are rectangular pads 403, and those marked with "#" are L-shaped pads 404. The line connecting the center of the main column 102 and the center of the side column 101 is the 0° line, with clockwise direction being positive and counterclockwise direction being negative. Five shortened pads 402, one normal pad 401, one rectangular pad 403, two normal pads 401, one L-shaped pad 404, one normal pad 401, one L-shaped pad 404, one normal pad 401, and one rectangular pad 403 are evenly arranged sequentially from 0° to 90°. One rectangular pad 403, one normal pad 401, one L-shaped pad 404, and one normal pad 401 are evenly arranged sequentially from 90° to 180°. One L-shaped pad 404, two normal pads 401, one rectangular pad 403, one normal pad 401, and five shortened pads 402 are arranged evenly in sequence from 0° to 90° in the negative direction. Another set of pads is arranged evenly in sequence from 90° to 180°. The set includes one rectangular pad 403, one normal pad 401, one L-shaped pad 404, one normal pad 401, one L-shaped pad 404, two normal pads 401, one rectangular pad 403, one normal pad 401, and five shortened pads 402.

[0054] This arrangement ensures both uniform support and prevents interference with other components.

[0055] like Figure 16 As shown, the support plate 50 is provided with several hollowed-out grooves 501, and the outer surface of the support plate 50 is provided with several limiting blocks 502.

[0056] The support plate 50 is installed on the support insulation end ring 40. The support plate 50 is fan-shaped and has a long strip-shaped hollow groove 501 on it to ensure that the oil in each layer of insulation cylinder 20 flows smoothly. The support plate 50 protrudes partially between the two L-shaped pads 404 in the support insulation end ring 40, and cooperates with the L-shaped support pad protrusion on the support insulation end ring 40 to play a limiting role.

[0057] like Figure 3 As shown, the surface of the side column 101 is provided with a ground screen 701, a surrounding screen 702 and a conformal cardboard 703 from the inside out. The ground screen 701, the surrounding screen 702 and the conformal cardboard 703 all cover at least one side of the side column 101 that is close to the main column 102.

[0058] A ground screen 701 is provided on the surface of the side post 101 to improve the shape of the electrodes on the core surface and to uniformly distribute the electric field on the core surface of the side post 101. A surrounding screen 702 is provided outside the ground screen 701 to reduce the electric field strength of the side post 101. Two layers of conformal paperboard 703 are provided outside the surrounding screen 702 to separate the oil gap. The oil gap between the conformal paperboard 703 and between the conformal paperboard and the surrounding screen 702 is about 10mm inside the core window and gradually increases outside the core window, thus separating the large oil gap between the side post 101 and the phase partition 801.

[0059] A partition plate 801 is provided between the main column 102 and the side column 101.

[0060] like Figure 1 and Figure 3 As shown, the phase spacer 801 is similar to the phase spacer 801 in the prior art. It is composed of 4 layers of 3mm thick insulating paperboard. A support strip 301 of about 12mm thickness is set between each two layers of paperboard to form an oil gap. The bottom of the phase spacer 801 falls directly onto the lower iron yoke insulation and is directly fixed to the upper and lower clamps.

[0061] This invention relates to a conformal insulation structure for ultra-high voltage transformers. Based on electric field simulation calculations, the shape of each layer of insulating paperboard outside the high-voltage coil 103 and each layer of insulating paperboard outside the side column 101 is designed to closely match the equipotential lines of the electric field, resulting in a more rational structure and higher insulation reliability. T4 paperboard support strips 301 are used to divide the oil gap, and the segmented support strips 302 at the coil 103 exit point are supported by 2mm insulating paper, ensuring that the actual oil gap size at each support strip 301 matches the theoretical size. Supporting insulating end rings 40 and insulating trays are used for support, and PET tape is used for binding and fixing, resulting in a more compact overall structure and higher mechanical strength. The elimination of insulating paperboard on the tank wall reduces the use of insulating screws and the risk of partial discharge problems or even through-discharge accidents caused by insulating screws. All insulating components are installed on the transformer body, allowing direct assembly into the oil tank after the transformer body is finished, resulting in shorter assembly time, higher assembly efficiency, and lower risk of moisture absorption by the transformer body. The structure is simpler, the manufacturing process is better, and production quality is easier to guarantee.

[0062] The above embodiments merely illustrate several implementation methods of the present invention, and their descriptions are relatively specific and detailed, but they should not be construed as limiting the scope of the invention patent. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of the present invention, and these all fall within the protection scope of the present invention. Therefore, the protection scope of this invention patent should be determined by the appended claims.

Claims

1. An ultra-high voltage transformer with a conformal insulation structure, characterized in that, include: Two side posts, two main posts disposed between the side posts, and a coil wound on the main posts. An insulating cylinder is disposed on the outside of the coil. The insulating cylinder consists of several integral insulating cylinders, several notched insulating cylinders, and several conformal insulating cylinders from the inside out. The oil gap size between two adjacent integral insulating cylinders is the same; the oil gap size between two adjacent notched insulating cylinders is the same, and the notch width of the outer notched insulating cylinder is not less than the notch width of the inner notched insulating cylinder; two adjacent conformal insulating cylinders form a conformal oil gap, and the size of the adjacent conformal oil gap increases from the side closer to the main column to the side farther from the main column, and the size of the conformal oil gap closer to the other main column is smaller than the size of the conformal oil gap closer to the oil tank; The insulating cylinder is provided with a support plate and a support insulating end ring arranged sequentially from top to bottom. The support insulating end ring includes several pads and paper rings disposed on the pads. The pads are evenly arranged circumferentially. The pads are divided into normal pads, shortened pads and support pads. The shortened pads are disposed between the main column and another main column and between the main column and the side column. The support pads are disposed on the high-voltage side and the low-voltage side of the coil. The support pads are divided into several rectangular pads and several L-shaped pads. The rectangular pads, the L-shaped pads and the normal pads are arranged alternately. The L-shaped pads include a straight section and a vertical section fixed to one end of the straight section. The side of the vertical section near the coil is provided with several protrusions corresponding to the limiting blocks of the support plate.

2. The ultra-high voltage transformer with conformal insulation structure according to claim 1, characterized in that: A support curtain is provided between two adjacent insulating cylinders. The support curtain includes several parallel support strips and several insulating strips that are fixedly connected to all the support strips in sequence. The insulating strips are perpendicular to the support strips. A groove is provided on the support strip where it intersects with the insulating strip. The insulating strip is bonded to the support strip at the groove.

3. A UHV transformer with conformal insulation structure according to claim 2, characterized in that: The support strip curtain is provided with a limiting groove that matches the exit angle ring.

4. A UHV transformer with conformal insulation structure according to claim 1, characterized in that: The support plate is provided with several hollowed-out grooves, and the outer surface of the support plate is provided with several limiting blocks.

5. A UHV transformer with conformal insulation structure according to claim 1, characterized in that: A partition plate is provided between the main column and the side column.

6. A UHV transformer with conformal insulation structure according to claim 1, characterized in that: The surface of the side column is provided with a ground screen, a surrounding screen, and a conformal cardboard from the inside out. The ground screen, the surrounding screen, and the conformal cardboard all cover at least the side of the side column closest to the main column.

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