Semi-conductive paper wrapped aluminum cable paper tape structure and oil-immersed composite voltage transformer

Abstract

The invention discloses a semi-conductive paper-wrapped aluminum cable paper tape structure and an oil-immersed composite voltage transformer, and the structure comprises an inner layer which is disposed at one side of a base layer and is used for uniformizing the distribution of an electric field; the base layer is used for arranging the inner layer and the outer layer; and the outer layer is arranged on the other side of the base layer and is used for structural shaping and electric field shielding. The base layer is used as a base layer for arranging the inner layer and the outer layer, needs to be made of an insulating material (such as cable paper), has certain mechanical strength and can be made into a composite material with the inner layer and the outer layer on the basis of ensuring insulation, the inner layer is used for uniformizing an electric field, and the outer layer forms a Faraday cage to improve the shielding performance and also has certain mechanical strength. In addition, a structure shaping effect is also needed, so that the shielding layer can be made into a plate-shaped shielding layer, and can also be made into a shielding tube as shown in Figure 7.

Description

Technical Field

[0001] This invention relates to the field of transformer technology, and more specifically, to a semi-conductive paper-wrapped aluminum cable paper tape structure and an oil-immersed composite voltage transformer. Background Technology

[0002] Currently, oil-immersed voltage transformers used in substations only function as voltage transformers, which is limited in application and cannot meet the needs of intelligent development. To meet the trend of intelligent substation development, the applicant has developed a multi-functional voltage transformer with a vertical, fully sealed structure. This series of products overcomes the technical shortcomings of single-function voltage transformers, combining the functions of both voltage transformers and transformers. It meets the needs of intelligent substations for multi-functional supporting equipment with a small footprint.

[0003] Our company has successfully developed a series of 40.5–550kV oil-immersed high-voltage substation composite voltage transformers, which possess the aforementioned structural features. Because these products meet the technical requirements for voltage transformers in intelligent power supply substations, their successful development will enhance the competitiveness of my country's power products in the international market, resulting in significant social and economic benefits.

[0004] The product features a metal expander at the top, a high-strength ceramic sleeve in the middle, and a square oil tank at the bottom. Its upright, oil-immersed, fully sealed structure offers advantages such as small size, low medium loss, maintenance-free operation, low temperature rise, large capacity, and high safety and reliability. The product meets user requirements, exhibits stable performance, and delivers excellent results.

[0005] To achieve advantages such as small size, low dielectric loss, maintenance-free operation, and high safety and reliability, the key issue to address is shielding. Immature shielding designs lead to poor insulation performance. Compensating for this requires increasing the distance between windings and the amount of insulating medium used, thus increasing the tank size. Therefore, improving the insulation performance of voltage transformers is the technical problem this application aims to solve. Summary of the Invention

[0006] The summary section introduces a series of simplified concepts, which will be further explained in detail in the detailed description section. The summary section of this invention is not intended to limit the key features and essential technical features of the claimed technical solution, nor is it intended to determine the scope of protection of the claimed technical solution.

[0007] To at least partially solve the above problems, the present invention provides a semiconductive paper-wrapped aluminum cable tape structure, comprising:

[0008] The inner layer, located on one side of the base layer, is used to distribute the electric field uniformly.

[0009] The base layer is used to set up the inner and outer layers;

[0010] The outer layer, located on the other side of the base layer, is used for structural shaping and electric field shielding.

[0011] Preferably, the inner layer is semi-conductive paper.

[0012] Preferably, the base layer is cable paper.

[0013] Preferably, the outer layer is made of a metallic material.

[0014] Preferably, the outer layer has a mesh structure.

[0015] Preferably, the outer layer is composed of several rows of extension components, each extension component being composed of several extension pieces, with adjacent extension pieces in adjacent rows connected by a first deformable member.

[0016] Preferably, the extension member includes a first support strip, a second support strip, a first connecting segment, and a second connecting segment, wherein the first support strip and the second support strip are parallel, and there is a first distance between the first support strip and the second support strip;

[0017] One end of the first support bar is connected to one end of the second connecting segment of the adjacent extension member, and the other end is connected to one end of the first connecting segment. The other end of the first connecting segment is connected to one end of the second support bar. The other end of the second support bar is connected to one end of the second connecting segment. The other end of the second connecting segment is connected to one end of the first support bar of the adjacent extension member.

[0018] One end of the first deformable member is connected to the first connecting segment, and the other end is connected to the second connecting segment of the adjacent extended member in the adjacent row.

[0019] Preferably, it also includes a third support bar, a third connecting section, a fourth connecting section, and a second deformable member;

[0020] One end of the first support bar is connected to one end of the fourth connecting segment of the adjacent extension member, and the other end is connected to one end of the first connecting segment. The other end of the first connecting segment is connected to one end of the second support bar. The other end of the second support bar is connected to one end of the second connecting segment. The other end of the second connecting segment is connected to one end of the third support bar. The other end of the third support bar is connected to one end of the third connecting segment. The other end of the third connecting segment is connected to one end of the second deformable member. The other end of the second deformable member is connected to one end of the fourth connecting segment. The other end of the fourth connecting segment is connected to one end of the first connecting segment of the adjacent extension member.

[0021] An oil-immersed composite voltage transformer includes a primary winding and a secondary winding disposed in an oil tank. A shielding layer is disposed between the primary winding and the secondary winding. The edge of the shielding layer is connected to the inner wall of the oil tank. The shielding layer is made of a semi-conductive paper-wrapped aluminum cable paper tape structure.

[0022] An oil-immersed composite voltage transformer includes a primary winding and a secondary winding disposed in an oil tank, and also includes a shielding tube, which is sleeved on the primary winding. Both ends of the shielding tube are connected to the inner wall of the oil tank. The shielding tube is made of the aforementioned semi-conductive paper-wrapped aluminum cable paper tape structure.

[0023] Compared with the prior art, the present invention has at least the following beneficial effects:

[0024] The base layer, serving as the foundation for the inner and outer layers, needs to be made of insulating materials (such as cable paper). In addition to ensuring insulation, it also needs to possess sufficient mechanical strength to form a composite material with the inner and outer layers. The inner layer is used to uniformly distribute the electric field, while the outer layer, besides forming a "Faraday cage" to improve shielding performance, also needs to play a structural shaping role. This allows the material to be manufactured as a plate-like shielding layer or a shielding tube, as described above. Figure 7 As shown.

[0025] The semi-conductive paper-wrapped aluminum cable paper tape structure and oil-immersed composite voltage transformer of the present invention, other advantages, objectives and features of the present invention will be apparent in part from the following description, and in part from the understanding of those skilled in the art through study and practice of the present invention. Attached Figure Description

[0026] The accompanying drawings are provided to further illustrate the invention and form part of the specification. They are used in conjunction with embodiments of the invention to explain the invention and do not constitute a limitation thereof. In the drawings:

[0027] Figure 1 This is a cross-sectional view of the semi-conductive paper-wrapped aluminum cable paper tape structure described in this invention.

[0028] Figure 2 This is a top view when the outer layer is a mesh structure.

[0029] Figure 3 This is a top view when the outer layer consists of several rows of extended components.

[0030] Figure 4 This is a schematic diagram of the first implementation method used for the extension component.

[0031] Figure 5 This is a schematic diagram of the second implementation method for the extension component.

[0032] Figure 6This is a schematic diagram showing the position of the shielding layer relative to the primary and secondary windings in an oil-immersed composite voltage transformer.

[0033] Figure 7 This is a schematic diagram illustrating the fabrication of the semi-conductive paper-wrapped aluminum cable paper tape structure of the present invention as a shielding layer and a shielding tube.

[0034] In the diagram: 1 Inner layer, 2 Base layer, 3 Outer layer, 4 Extension component, 51 First deformable component, 52 Second deformable component, 61 First support bar, 62 Second support bar, 63 Third support bar, 71 First connecting section, 72 Second connecting section, 73 Third connecting section, 74 Fourth connecting section, 100 Primary winding, 200 Secondary winding, 300 Shielding layer, 400 Shielding tube. Detailed Implementation

[0035] The present invention will now be described in further detail with reference to the accompanying drawings and embodiments, so that those skilled in the art can implement it based on the description.

[0036] It should be understood that terms such as “having,” “comprising,” and “including” as used herein do not exclude the presence or addition of one or more other elements or combinations thereof.

[0037] like Figures 1-7 As shown, the present invention provides a semi-conductive paper-wrapped aluminum cable paper tape structure, including: an inner layer 1, disposed on one side of a base layer 2, for uniform electric field distribution and improving insulation performance; the inner layer 1 can be commercially available semi-conductive paper or existing technology.

[0038] The base layer 2 is used to set the inner layer 1 and the outer layer 3; the base layer 2 can be commercially available cable paper or existing technology.

[0039] The outer layer 3 is located on the other side of the base layer 2 and is used for structural shaping and electric field shielding. The outer layer 3 is a mesh structure made of metal material, usually made by plating aluminum or pressing aluminum foil on the base layer 2. By setting the outer layer 3 as a mesh structure, a "Faraday cage" is formed, thereby improving the shielding performance.

[0040] The working principle and beneficial effects of the above technical solution are as follows: Through the design of the above structure, the base layer 2 exists as the foundation layer for setting the inner layer 1 and the outer layer 3. It itself needs to be made of insulating material (such as cable paper). In addition to ensuring insulation, it also needs to have a certain mechanical strength to be able to form a composite material with the inner layer 1 and the outer layer 3. The inner layer 1 is used to uniformly distribute the electric field, and the outer layer 3, in addition to forming a "Faraday cage" to improve shielding performance, also needs to play a role in structural shaping. This allows the present application to be made into a plate-shaped shielding layer or a shielding tube, such as... Figure 7 As shown.

[0041] In the foregoing embodiments, we mentioned achieving the shielding effect using a "Faraday cage." To achieve this effect, the outer layer 3 needs to be configured as follows: Figure 2 The mesh structure shown is a traditional mesh structure with limited ductility. Therefore, the outer layer 3 of the mesh can not be bent or can only be bent very little after it is made into a shielding layer or shielding tube. Thus, the mesh structure is only suitable for shielding structures with relatively regular shapes, such as plates or tubes.

[0042] To increase the applicability of this application, and to enable secondary processing of the shape after fabrication into a shielding layer or shielding tube, we provide two additional implementation methods. The outer layer 3 is composed of several rows of extended components, such as... Figure 3 As shown, the extension components are arranged vertically and interconnected. Each extension component consists of several extension pieces 4. Adjacent extension pieces 4 in adjacent rows are connected by a first deformable piece 51. Figure 3 As shown, the extended member 4 is connected to the two adjacent extended members 4 above and below via the first deformable member 51. Simultaneously, the extended member 4 is also connected to the two adjacent extended members 4 on the left and right. The extended member 4... Figure 3 The horizontal direction shown has a certain degree of extension. By setting the first deformable member 51, the extension member 4 is able to... Figure 3 The vertical direction also has a certain degree of extension, which allows the manufactured shielding layer or shielding tube to have a greater degree of freedom for secondary processing.

[0043] like Figure 4 As shown, in the first embodiment, the extension member 4 includes a first support bar 61, a second support bar 62, a first connecting segment 71, and a second connecting segment 72. The first support bar 61 is parallel to the second support bar 62 and extends along... Figure 4 The vertical arrangement shown has a first distance between the first support bar 61 and the second support bar 62, which allows the extension member 4 to have sufficient deformation space when the outer layer 3 is bent (i.e., when the shielding layer is bent into a shielding tube and the central axis of the shielding tube is parallel to the two support bars).

[0044] like Figure 4 As shown, one end of the first support bar 61 is connected to one end of the second connecting segment 72 of the adjacent extension member 4, and the other end is connected to one end of the first connecting segment 71. The other end of the first connecting segment 71 is connected to one end of the second support bar 62, so that the first support bar 61, the first connecting segment 71 and the second support bar 62 form a structure as shown in the diagram. Figure 4 The "n" shape shown; the other end of the second support bar 62 is connected to one end of the second connecting segment 72, and the other end of the second connecting segment 72 is connected to one end of the first support bar 61 of the adjacent extension 4, so that the second support bar 62, the second connecting segment 72 and the first support bar 61 of the adjacent extension 4 form an "n" shape; Figure 4 The "u" shape shown;

[0045] One end of the first deformable member 51 is connected to the first connecting section 71, and the other end is connected to the second connecting section 72 of the adjacent extension member 4 in the adjacent row. To further increase the deformation, the first deformable member 51 usually adopts an "S"-shaped design, such as... Figure 4 As shown, this ensures that the extension part 4 can have a sufficiently large deformation, while effectively avoiding excessively large "mesh" when the outer layer 3 is used as a plane (e.g., a shielding layer).

[0046] In the first embodiment, we can achieve this by setting a first support bar 61 and a second support bar 62. Figure 7 The plate-shaped shielding layer is bent into a shielding tube (the central axis of the shielding tube is parallel to the two support bars); the first deformable member 51 can be used to... Figure 7 The plate-shaped shielding layer is bent into a shielding tube (the central axis of the shielding tube is perpendicular to the two support bars), but it is still impossible to achieve misalignment along the plane. Therefore, based on the first implementation method, we provide a second implementation method.

[0047] In this embodiment, it also includes a third support bar 63, a third connecting segment 73, a fourth connecting segment 74, and a second deformable member 52. A second distance exists between the third support bar 63 and the second support bar 62; a third distance exists between the second deformable member 52 and the third support bar 63; and a fourth distance exists between the second deformable member 52 and the first support bar 61 of the adjacent extension member 4. This ensures that... Figure 5 It can be bent in the horizontal direction (that is, after being bent into a shielding tube, the central axis of the shielding tube is parallel to the three support bars);

[0048] like Figure 5 As shown, one end of the first support bar 61 is connected to one end of the fourth connecting segment 74 of the adjacent extension member 4, and the other end is connected to one end of the first connecting segment 71. The other end of the first connecting segment 71 is connected to one end of the second support bar 62, so that the first support bar 61, the first connecting segment 71 and the second support bar 62 form a structure as shown in the figure. Figure 5 The "n" shape shown; one end of the second support bar 62 is connected to one end of the second connecting segment 72, and the other end of the second connecting segment 72 is connected to one end of the third support bar 63, so that the second support bar 62, the second connecting segment 72 and the third support bar 63 form an "n" shape; Figure 5 The U-shape shown; the other end of the third support bar 63 is connected to one end of the third connecting segment 73, and the other end of the third connecting segment 73 is connected to one end of the second deformable member 52, the second deformable member 52 being as shown Figure 5 The "S" shape shown indicates that when two adjacent extensions 4 are in... Figure 3When misalignment occurs in the same plane as shown, there can be sufficient deformation between the two adjacent extensions 4. The other end of the second deformable member 52 is connected to one end of the fourth connecting segment 74, and the other end of the fourth connecting segment 74 is connected to one end of the first connecting segment 71 of the adjacent extension 4.

[0049] The present invention also provides an oil-immersed composite voltage transformer, comprising a primary winding 100 and a secondary winding 200 disposed within an oil tank, wherein a shielding layer 300 is disposed between the primary winding 100 and the secondary winding 200, such as... Figure 6 As shown, the edge of the shielding layer 300 is connected to the inner wall of the oil tank, and the shielding layer 300 is made of the semi-conductive paper-wrapped aluminum cable paper tape structure.

[0050] The present invention also provides an oil-immersed composite voltage transformer, including a primary winding 100 and a secondary winding 200 disposed in an oil tank, and a shielding tube 400, wherein the shielding tube 400 is sleeved on the primary winding 100, and both ends of the shielding tube 400 are connected to the inner wall of the oil tank, and the shielding tube 400 is made of the aforementioned semi-conductive paper-wrapped aluminum cable paper tape structure.

[0051] In the description of this invention, it should be understood that the terms "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," and "circumferential" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing this invention and simplifying the description, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this invention.

[0052] In this invention, unless otherwise explicitly specified and limited, the terms "installation," "connection," "linking," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection, an electrical connection, or a connection that allows communication between them; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components, unless otherwise explicitly limited. Those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances.

[0053] Although embodiments of the present invention have been disclosed above, they are not limited to the applications listed in the specification and embodiments. They can be applied to various fields suitable for the present invention. Other modifications can be easily made by those skilled in the art. Therefore, without departing from the general concept defined by the claims and their equivalents, the present invention is not limited to the specific details and illustrations shown and described herein.

Claims

1. A semi-conductive paper-wrapped aluminum cable paper tape structure, characterized in that, include: The inner layer (1) is set on one side of the base layer (2) for uniform electric field distribution; The base layer (2) is used to set the inner layer (1) and the outer layer (3); The outer layer (3) is located on the other side of the base layer (2) and is used for structural shaping and electric field shielding.

2. The semi-conductive paper-wrapped aluminum cable paper tape structure according to claim 1, characterized in that, The inner layer (1) is a semi-conductive paper.

3. The semi-conductive paper-wrapped aluminum cable paper tape structure according to claim 1, characterized in that, The base layer (2) is cable paper.

4. The semi-conductive paper-wrapped aluminum cable paper tape structure according to claim 1, characterized in that, The outer layer (3) is made of metallic material.

5. The semi-conductive paper-wrapped aluminum cable paper tape structure according to claim 1, characterized in that, The outer layer (3) has a mesh structure.

6. The semi-conductive paper-wrapped aluminum cable paper tape structure according to claim 1, characterized in that, The outer layer (3) is composed of several rows of extension components, each of which is composed of several extension pieces (4). Two adjacent extension pieces (4) located in adjacent rows are connected by a first deformable piece (51).

7. The semi-conductive paper-wrapped aluminum cable tape structure according to claim 6, characterized in that, The extension member (4) includes a first support bar (61), a second support bar (62), a first connecting section (71) and a second connecting section (72), the first support bar (61) and the second support bar (62) are parallel, and there is a first distance between the first support bar (61) and the second support bar (62); One end of the first support bar (61) is connected to one end of the second connecting segment (72) of the adjacent extension member (4), and the other end is connected to one end of the first connecting segment (71). The other end of the first connecting segment (71) is connected to one end of the second support bar (62). The other end of the second support bar (62) is connected to one end of the second connecting segment (72). The other end of the second connecting segment (72) is connected to one end of the first support bar (61) of the adjacent extension member (4). One end of the first deformable member (51) is connected to the first connecting section (71), and the other end is connected to the second connecting section (72) of the adjacent extension member (4) in the adjacent row.

8. The semi-conductive paper-wrapped aluminum cable paper tape structure according to claim 7, characterized in that, It also includes a third support bar (63), a third connecting section (73), a fourth connecting section (74), and a second deformable component (52); One end of the first support bar (61) is connected to one end of the fourth connecting segment (74) of the adjacent extension (4), and the other end is connected to one end of the first connecting segment (71). The other end of the first connecting segment (71) is connected to one end of the second support bar (62). The other end of the second support bar (62) is connected to one end of the second connecting segment (72). The other end of the second connecting segment (72) is connected to one end of the third support bar (63). The other end of the third support bar (63) is connected to one end of the third connecting segment (73). The other end of the third connecting segment (73) is connected to one end of the second deformable member (52). The other end of the second deformable member (52) is connected to one end of the fourth connecting segment (74). The other end of the fourth connecting segment (74) is connected to one end of the first connecting segment (71) of the adjacent extension (4).

9. An oil-immersed composite voltage transformer, comprising a primary winding (100) and a secondary winding (200) disposed within an oil tank, characterized in that, A shielding layer (300) is provided between the primary winding (100) and the secondary winding (200), the edge of the shielding layer (300) being connected to the inner wall of the oil tank, and the shielding layer (300) being made of the semi-conductive paper-wrapped aluminum cable paper tape structure as described in any one of claims 1-8.

10. An oil-immersed composite voltage transformer, comprising a primary winding (100) and a secondary winding (200) disposed within an oil tank, characterized in that, It also includes a shielding tube (400), which is sleeved on the primary winding (100). Both ends of the shielding tube (400) are connected to the inner wall of the oil tank. The shielding tube (400) is made of the semi-conductive paper-wrapped aluminum cable paper tape structure as described in any one of claims 1-8.

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