Phase partition plate and transformer
By setting phase spacer plates between phases of the transformer, including insulating plates and oil gaps, the discharge and safety hazards caused by too close phase distances are solved, and electrical safety and equipment reliability are improved.
Patent Information
- Application Number
- CN202421631237.5
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-07-10
- Publication Date
- 2025-05-30
- Estimated Expiration
- 2034-07-10
AI Technical Summary
The phases of the transformer are too close to be separated effectively, resulting in discharge and safety hazards.
A phase spacer is designed, including at least two layers of insulating plates and an insulating support assembly, with an oil gap between the insulating plates, and the insulating support assembly is connected to the insulating plates to maintain phase spacing.
Effectively isolate the phase of the transformer, improve electrical safety, reduce the possibility of electrical breakdown, and ensure the reliability and stability of the transformer and substation.
Smart Images
Figure CN222927275U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of power equipment, and particularly relates to a phase spacer and a transformer. Background Art
[0002] Due to the complex structure of the substation and high power frequency withstand voltage requirements, in order to pursue low cost and high efficiency, the internal space of the substation is generally compressed. This will compress the volume of the transformer used in the substation, resulting in too close distance between the phases of the transformer. And too close phase distance is likely to cause discharge, affecting the normal operation of the transformer and posing a safety hazard. Therefore, a reliable structure is needed to separate the phase coils of the transformer to avoid this situation.
[0003] Currently, existing transformers generally use thick cardboard to separate the phase coils, but the separation effect and withstand voltage strength need to be improved. Summary of the Utility Model
[0004] The main purpose of the utility model is to propose a phase spacer and a transformer, aiming to solve the technical problem that the distance between the phases of the transformer is too close and cannot be effectively separated.
[0005] To achieve the above purpose, a phase spacer proposed by the utility model is applied to a transformer. The transformer has multiple phases, and a phase spacer is included between adjacent phases. The phase spacer includes:
[0006] At least two insulating plates, which are used to separate between adjacent phases of the transformer, and an oil gap is provided between at least two insulating plates;
[0007] An insulating support assembly, which is arranged between adjacent two insulating plates and connects adjacent two insulating plates.
[0008] In one embodiment, at least two insulating plates have an oil inlet end and an oil outlet end arranged oppositely in the longitudinal direction, and the oil gap runs through the oil inlet end and the oil outlet end.
[0009] In one embodiment, the insulating support assembly includes a plurality of support members arranged at intervals.
[0010] In one embodiment, the support members are strip-shaped or block-shaped, and the support members are arranged longitudinally and / or transversely.
[0011] In one embodiment, at least two adjacent support members and the insulating plate of the adjacent layer enclose an oil gap therebetween.
[0012] In one embodiment, the support members and the insulating plates are made of any one or a combination of cardboard, laminated wood, nylon, etc.
[0013] In one embodiment, the insulating support assembly includes multiple groups of support members arranged at intervals in a first direction. Each group of support members includes a plurality of the support members, and the plurality of support members in each group are arranged side by side and spaced apart from each other in the first direction or the second direction.
[0014] In one embodiment, the thickness of each layer of the insulating board is between 1.5 mm and 3.5 mm, and the distance between adjacent two layers of insulating boards is between 1.5 mm and 3.5 mm.
[0015] The present utility model further provides a transformer, which has multiple phases, and a phase spacer as described above is provided between any two adjacent phases.
[0016] In one embodiment, the transformer has an oil outlet part and an oil inlet part, and the oil gap of the phase spacer is connected between the oil outlet part and the oil inlet part.
[0017] Compared with the prior art, the present utility model has the following beneficial effects:
[0018] The technical solution of the present utility model adds a phase spacer between adjacent phases of the transformer, and at least two layers of insulating boards of the phase spacer are blocked between adjacent phases of the transformer, which can prevent adjacent phases from directly contacting, so as to improve electrical safety, reduce or avoid the possibility of electrical breakdown, ensure the reliability and stability of the transformer and the substation, and avoid affecting the quality of the transformer and the substation;
[0019] The insulating support assembly is arranged between adjacent two layers of insulating boards and connects the adjacent two layers of insulating boards, which can prevent the coils of each phase of the transformer from expanding and causing the partition board to be squeezed and deformed by the coils of the adjacent phases approaching each other, so as to further achieve stable blocking and ensure that adjacent phases remain spaced apart;
[0020] There is an oil gap between at least two layers of insulating boards, and transformer oil flows into the oil gap, which can optimize the insulation performance and withstand voltage strength between the coils of each phase, avoid the problem of electrical breakdown, and reduce after-sales service costs;
[0021] The flowing transformer oil can timely take away the heat of the coils of each phase and the transformer components, which is convenient for application in substations with high requirements for the use space, reduces the heat dissipation problem caused by compressed space, and avoids the influence of temperature on insulation, so as to further improve the operating stability. BRIEF DESCRIPTION OF THE DRAWINGS
[0022] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the following will briefly introduce the drawings required for the description of the embodiments or the prior art. Obviously, the drawings in the following description are only some embodiments of the present invention. For those of ordinary skill in the art, without creative efforts, other drawings can be obtained based on the structures shown in these drawings.
[0023] Figure 1 Schematic structural diagram of an embodiment of the phase spacer provided by the present invention;
[0024] Figure 2 For Figure 1 Cross-sectional view taken along line A-A of
[0025] Figure 3 For Figure 1 Cross-sectional view taken along line B-B of
[0026] Figure 4 Schematic structural diagram of another embodiment of the phase spacer provided by the present invention;
[0027] Figure 5 Schematic structural diagram of yet another embodiment of the phase spacer provided by the present invention;
[0028] Figure 6 Schematic structural diagram of yet another embodiment of the phase spacer provided by the present invention;
[0029] Figure 7 Schematic structural diagram of yet another embodiment of the phase spacer provided by the present invention.
[0030] Explanation of the reference numerals in the drawings:
[0031] 110, insulating board; 120, insulating support assembly; 121, support member; 1211, support member group; 130, oil gap.
[0032] The realization of the object, functional features and advantages of the present invention will be further described with reference to the embodiments and the accompanying drawings. Detailed implementation manners
[0033] The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only some of the embodiments of the present invention, rather than all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts belong to the scope of protection of the present invention.
[0034] It should be noted that if there are directional indications (such as up, down, left, right, front, back...) involved in the embodiments of the present utility model, the directional indications are only used to explain the relative positional relationship, movement conditions, etc. between components in a specific posture. If the specific posture changes, the directional indications will also change accordingly.
[0035] In addition, if there are descriptions involving "first", "second", etc. in the embodiments of the present utility model, the descriptions of "first", "second", etc. are only for descriptive purposes and cannot be understood as indicating or implying their relative importance or implicitly specifying the quantity of the indicated technical features. Thus, the features defined with "first" and "second" may explicitly or implicitly include at least one such feature. In addition, if "and / or" or "and / or" appears throughout the text, its meaning includes three parallel scenarios. Taking "A and / or B" as an example, it includes scenario A, scenario B, or the scenario where both A and B are satisfied simultaneously. In addition, the technical solutions between various embodiments can be combined with each other, but it must be based on the fact that those skilled in the art can implement them. When the combination of technical solutions results in contradictions or cannot be implemented, it should be considered that such a combination of technical solutions does not exist and is not within the protection scope required by the present utility model.
[0036] Due to the complex structure of the substation and high requirements for power frequency withstand voltage, in order to pursue low cost and high efficiency, the internal space of the substation is generally compressed. Taking the photovoltaic American substation (i.e., photovoltaic American transformer) as an example, the structure of the 35kV photovoltaic American transformer is more complex than that of the 10kV photovoltaic American transformer, and the requirements for power frequency withstand voltage are also higher. If the internal space of the substation is compressed to pursue low cost and the volume of the transformer used in the substation is further compressed, it will result in too close distances between the phases of the transformer, and too close phase distances are likely to cause discharge, affecting the normal operation of the transformer and posing a safety hazard. If, like some existing substations, only thick paper is used to separate the phase coils of the transformer, during the operation of the substation, the expansion of the phase coils will cause the adjacent phases to approach each other and even cause the transformer to burn out, and this thick paper will be squeezed and deformed, unable to play an effective blocking role.
[0037] To solve the technical problem that the distances between the phases of the transformer are too close and cannot be effectively separated, the present utility model provides a phase spacer and a transformer. The transformer can specifically be a two-phase oil-immersed transformer or a multi-phase oil-immersed transformer.
[0038] Refer to Figures 1 to 7, The phase spacer is applied to a transformer. The transformer has multiple phases, and a phase spacer is included between adjacent phases. The phase spacer includes at least two layers of insulating plates 110 and an insulating support assembly 120. By adding a phase spacer between the multiple phases of the transformer and blocking at least two layers of insulating plates 110 of the phase spacer between adjacent phases of the transformer, direct contact between adjacent phases can be avoided, thereby improving electrical safety, reducing or avoiding the possibility of electrical breakdown, ensuring the reliability and stability of the transformer and the substation, and preventing the quality of the transformer and the substation from being affected.
[0039] At least two layers of insulating plates 110 are used to block between adjacent phases of the transformer; the insulating support assembly 120 is disposed between two adjacent layers of insulating plates 110 and connects the two adjacent layers of insulating plates 110. This is used to prevent the expansion of the coils of each phase of the transformer from causing the spacer to be squeezed and deformed by the coils of the adjacent phases approaching each other, so as to further achieve stable blocking and ensure that adjacent phases remain spaced apart.
[0040] The insulating plate 110 is optionally set as a flat plate or a plate with an uneven surface. When the insulating plate 110 is a flat plate, an oil gap 130 is formed in a space enclosed by at least two layers of insulating plates and the insulating support assembly 120 with a closed or incompletely closed peripheral wall. When the insulating plate 110 is a plate with an uneven surface, the surface of the plate has pits, patterns (such as wavy patterns), etc. The positions of the pits on adjacent layers of insulating plates 110 can be set relatively or alternately, and the oil gap 130 is formed between at least two pits (or patterns, etc.) of the insulating plates; or, the oil gap 130 is formed in a space enclosed by at least two layers of insulating plates 110 and the insulating support assembly 120 with a closed or incompletely closed peripheral wall.
[0041] An oil gap 130 is provided between at least two layers of insulating plates 110. Transformer oil flows into the oil gap, which can optimize the insulation performance and withstand voltage strength between phases, avoid problems of electrical breakdown, and reduce after-sales service costs. By the flowing transformer oil, the heat of the coils of each phase and the transformer components can be taken away in time, and it is also convenient to be applied to a substation with high requirements for the use space, reducing the heat dissipation problem caused by compressed space, avoiding the influence of temperature on insulation, and further improving the stability of operation.
[0042] Optionally, the insulating support assembly 120 is disposed between two adjacent insulating plates 110 and connects the two adjacent insulating plates 110 by means of snap connection, bonding or the like. When there are three or more layers of insulating plates 110, the sizes of the multiple layers of insulating plates 110 may be the same or different. When the sizes of the multiple layers of insulating plates 110 are different, two adjacent insulating plates 110 may be adjacent insulating plates 110 to enclose an oil gap 130 therebetween; two adjacent insulating plates 110 may also be insulating plates 110 that are adjacent across layers to enclose an oil gap 130 between the adjacent multiple layers of insulating plates 110. Specifically, it can be set according to the actual situation and is not limited herein.
[0043] In one embodiment, at least two insulating plates 110 have an oil inlet end and an oil outlet end that are oppositely arranged in the longitudinal direction, and the oil gap 130 penetrates through the oil inlet end and the oil outlet end.
[0044] The oil inlet end is used to input transformer oil, and the oil outlet end is used to output transformer oil. Arranging the oil inlet end and the oil outlet end in the longitudinal direction can enable the transformer oil entering the oil gap 130 in the partition from the oil inlet end to flow out from the oil outlet section under the action of gravity, which is convenient for the flow of the transformer oil, and can timely take away the heat of each phase coil and transformer components, and further optimize the insulation and withstand voltage strength between phases of the transformer.
[0045] Optionally, at least one oil gap 130 is formed between at least two insulating plates 110. At least two insulating plates 110 have at least one oil inlet end and at least one oil outlet end. When there are multiple oil gaps 130, the multiple oil gaps 130 may penetrate through the same oil inlet end and / or oil outlet end.
[0046] At least two insulating plates 110 have an upper side and a lower side that are oppositely arranged in the longitudinal direction, and a left side and a right side that are oppositely arranged in the transverse direction. The upper side and the lower side of at least two insulating plates 110 are not completely closed to set the oil inlet end and the oil outlet end. Optionally, the support member 121 can be used to close the left side and / or the right side of at least two insulating plates 110. When the support member 121 closes the left and right sides of at least two insulating plates 110, it can be used to connect the phase spacers to form a vertically penetrating closed structure to prevent the transformer oil from overflowing from the periphery of the phase spacers; alternatively, the support member 121 can be used to connect to any position of the two insulating plates 110 without limiting to closing any side of at least two insulating plates 110 to meet different actual usage requirements.
[0047] In one embodiment, the insulating support assembly 120 includes a plurality of support members 121 arranged at intervals. The adjacent insulating plates 110 are effectively supported by the plurality of support members 121 arranged at intervals, so as to avoid the partition plate from deforming due to the expansion of the phase wire coil squeezing the phase spacer during use, so as to further achieve stable partitioning and ensure that there is an interval between the phases of the transformer.
[0048] Optionally, the plurality of support members 121 are optionally arranged at intervals longitudinally, or, the plurality of support members 121 are optionally arranged at intervals transversely or in any other direction suitable for actual use. The shapes, sizes, dimensions, and arrangement directions of the plurality of support members 121 may be the same or different. The shown support member 121 can be arranged at any position between the insulating plates 110 of adjacent layers, specifically, it can be at any position such as the middle or the periphery of the insulating plates 110 of adjacent layers.
[0049] Optionally, the shown support member 121 can specifically be, but is not limited to, any one or a combination of a straight strip shape, an irregular broken line shape, an arc shape, a block shape, etc.
[0050] In one embodiment, the support member 121 is in a strip shape or a block shape, and the support member 121 is arranged longitudinally and / or the support member 121 is arranged transversely. Specifically, the support member 121 in a strip shape or a block shape extends longitudinally; and / or, the support member 121 in a strip shape or a block shape extends transversely.
[0051] Optionally, the cross-section of the support member 121 is in any one or a combination of regular or irregular shapes such as a circle, an ellipse, a rectangle, a square, a trapezoid, a serrated shape, a wavy shape, etc. An oil gap 130 is formed by enclosing between the support member 121 and the insulating plates 110 of adjacent layers. In some other optional embodiments of the present utility model, the cross-section of the support member 121 is in a ring shape, and at least part of the oil gap 130 is formed in the space enclosed between at least two adjacent support members 121 and the insulating plates 110 of adjacent layers, and the other part of the oil gap 130 is formed in the middle space of the support member 121; specifically, it can be set according to the actual situation, and the setting of the support member 121 and the oil gap 130 is not limited herein.
[0052] Optionally, an oil gap 130 is formed by enclosing between the support member 121 and the insulating plates 110 of adjacent layers.
[0053] In one embodiment, an oil gap 130 is formed by enclosing between at least two adjacent support members 121 and the insulating plates 110 of adjacent layers.
[0054] It is understandable that the support member 121 is disposed between two adjacent insulating plates 110 and connects the two adjacent insulating plates 110. At least two adjacent support members 121 and the insulating plates 110 of the adjacent layers enclose an oil gap 130 as the groove walls of the oil gap 130. At least two adjacent support members 121 and the insulating plates 110 of the adjacent layers enclose an oil gap 130 with a closed or incompletely closed peripheral wall, and each oil gap 130 has at least three groove wall surfaces.
[0055] Each component of the insulating support assembly 120 and the insulating plate 110 are made of insulating materials. In order to ensure the insulation performance between the phase coils, facilitate material selection and processing, and reduce the production and manufacturing costs, in one embodiment, the support member 121 and the insulating plate 110 are made of any one, a combination of multiple ones, or other various insulating materials such as cardboard, laminated wood, and nylon.
[0056] Referring to Figures 1 to 3 , in one embodiment, the insulating support assembly 120 includes multiple groups of support member groups 1211 arranged at intervals in the first direction. Each group of support member groups 1211 includes multiple support members 121, and the multiple support members 121 in each group are arranged side by side and spaced from each other in the first direction or the second direction.
[0057] Optionally, the first direction and the second direction are perpendicular to each other or form an arbitrary angle. The support member 121 is optionally connected to the two adjacent insulating plates 110 in any manner used in actual use.
[0058] Further, one of the first direction and the second direction is longitudinal and the other is transverse. Referring to Figures 1 to 3 , taking the first direction as the longitudinal direction and the second direction as the transverse direction as an example, the insulating support assembly 120 includes two groups, three groups or other multiple groups of support member groups 1211 arranged at intervals. And to reduce the processing difficulty and processing time, taking the insulating support assembly 120 including three groups of support member groups 1211 arranged at intervals as a further example.
[0059] Referring to Figures 1 to 5 , multiple groups of support member groups 1211 are arranged at intervals in sequence in the longitudinal direction. Each group of support member groups 1211 includes multiple support members 121, the multiple support members 121 in each group are arranged side by side and spaced from each other in the transverse direction, and the support members 121 in each group are arranged in the longitudinal direction; referring to Figure 6 , multiple groups of support member groups 1211 are arranged at intervals in sequence in the longitudinal direction. Each group of support member groups 1211 includes multiple support members 121, the multiple support members 121 in each group are arranged side by side and spaced from each other in the transverse direction, and the support members 121 in each group are arranged in the transverse direction.
[0060] In addition, when there is one group of support member groups 1211, referring to Figure 7, the support member group 1211 includes a plurality of support members 121. The plurality of support members 121 are arranged side by side and spaced from each other in the transverse direction and / or the longitudinal direction. The support members 121 in each group are arranged in the transverse direction and / or the longitudinal direction.
[0061] Optionally, the arrangement modes of the plurality of support members 121 of different support member groups 1211 may be the same or different. The sizes of the plurality of support members 121 in the same support member group 1211 and the spacing distances between the support members 121 may be the same or different.
[0062] The length of the phase spacer is determined by the length of the phase spacer in the transverse direction, the height of the phase spacer is determined by the length of the phase spacer in the longitudinal direction. At least two layers of insulating plates 110 are stacked in sequence in the direction perpendicular to the plane where the insulating plate 110 is located, and the thickness of the phase spacer is determined by the stacking thickness of at least two layers of insulating plates 110. In the present utility model, the phase-to-phase safety distance can be specifically set according to the actual situation, and the thickness of the phase spacer is determined by the phase-to-phase safety distance, and further the thickness of each layer of insulating plate 110 and the distance between two adjacent layers of insulating plates 110 are determined.
[0063] In an embodiment, the thickness of each layer of insulating plate 110 is between 1.5 mm and 3.5 mm, and the distance between two adjacent layers of insulating plates 110 is between 1.5 mm and 3.5 mm.
[0064] In this way, the thickness of the insulating plate 110 can be ensured, and the thickness of the insulating support assembly 120 is further limited by limiting the distance between two adjacent layers of insulating plates 110, so as to achieve stable separation and ensure that the coils of each phase are spaced apart. By setting the oil gap 130 to inject transformer oil, the insulation performance and withstand voltage strength between the coils of each phase are optimized, and the problem of electrical breakdown is avoided. By limiting the distance between two adjacent layers of insulating plates 110, the mechanical space distance between phases is further ensured, the influence on the setting of the oil gap 130 caused by too small a distance is avoided, and the influence on the stability of the overall structure caused by too large a distance and the need to compress the thickness of the insulating plate 110 is also avoided.
[0065] The phase spacer shown in the present utility model is provided with at least two layers of insulating plates 110. The sizes such as the length, height, and thickness of different insulating plates 110 may be the same or different; similarly, when there are at least three layers of insulating plates 110, the distances between different adjacent layers of insulating plates 110 may be the same or different, and the same is true for the setting of the support members 121 arranged between different adjacent layers of insulating plates 110, which are not limited herein.
[0066] The present utility model also provides a transformer, which has multiple phases, and a phase spacer as shown in the above embodiments is provided between any adjacent phases. Since this transformer adopts all the technical solutions of the above embodiments, it has at least all the beneficial effects brought by the technical solutions of the above embodiments. The specific implementation manners of this embodiment refer to the foregoing embodiments, so they will not be elaborated herein one by one.
[0067] Optionally, the phase spacers provided between different phases can be independently arranged or combined, which can be specifically set according to the actual situation and is not limited herein.
[0068] In one embodiment, the transformer has an oil outlet part and an oil inlet part, and the oil gap 130 of the phase spacer is connected between the oil outlet part and the oil inlet part.
[0069] At least two insulating plates 110 have an oil inlet end and an oil outlet end arranged oppositely in the longitudinal direction, and the oil gap 130 penetrates through the oil inlet end and the oil outlet end. During use, the phase spacer is arranged between adjacent phases in a vertically placed form. The oil inlet end of the oil gap 130 is used to connect to the oil outlet part of the transformer, and the oil outlet end of the oil gap 130 is used to connect to the oil inlet part of the transformer, so as to enhance the withstand voltage strength between the phase coils of the transformer by filling with oil.
[0070] The above description is only an exemplary embodiment of the present utility model, and does not limit the patent scope of the present utility model. Any equivalent structural transformation made under the technical concept of the present utility model by using the content of the specification and drawings of the present utility model, or directly / indirectly applied in other related technical fields, is included in the patent protection scope of the present utility model.
Claims
1. A phase partition, applied to a transformer, wherein the transformer has multiple phases, characterized in that: Adjacent phases include phase partitions, and the phase partitions include: At least two layers of insulating plates, the at least two layers of insulating plates are used to isolate adjacent phases of the transformer, and an oil gap is provided between the at least two layers of insulating plates; The insulating support assembly is arranged between two adjacent insulating plates and connects the two adjacent insulating plates.
2. The phase partition according to claim 1, characterized in that: At least two layers of the insulating plates have oil inlet ends and oil outlet ends that are arranged opposite to each other in the longitudinal direction, and the oil gap is arranged to pass through the oil inlet ends and the oil outlet ends.
3. The phase partition according to claim 1, characterized in that: The insulating support assembly includes a plurality of support members arranged at intervals.
4. The phase partition according to claim 3, characterized in that: The support member is in a strip or block shape, and the support member is arranged in a longitudinal direction and / or the support member is arranged in a transverse direction.
5. The phase partition according to claim 3, characterized in that: An oil gap is formed between any two adjacent supporting members and the insulating plates of adjacent layers.
6. The phase partition according to any one of claims 3 to 5, characterized in that: The insulating support assembly includes a plurality of support member groups spaced apart along a first direction, each support member group includes a plurality of support members, and the plurality of support members in each group are arranged side by side and spaced apart from each other along the first direction or the second direction.
7. The phase partition according to any one of claims 1 to 5, characterized in that: The thickness of each layer of the insulating plate is between 1.5 mm and 3.5 mm, and the distance between two adjacent layers of the insulating plate is between 1.5 mm and 3.5 mm.
8. A transformer having multiple phases, characterized in that: A phase partition as described in any one of claims 1 to 7 is provided between any adjacent phases.
9. The transformer according to claim 8, characterized in that The transformer has an oil outlet and an oil inlet, and the oil gap of the phase partition is connected between the oil outlet and the oil inlet.