A coaxial horizontal superconducting transformer

Abstract

The invention discloses a coaxial horizontal superconducting transformer, which relates to the technical field of superconducting power application, including: an iron core; a transformer assembly, including a low-voltage superconducting coil and a high-voltage superconducting coil coaxially sleeved on the iron core, and the high-voltage superconducting coil is sleeved outside the low-voltage superconducting coil; wherein the low-voltage superconducting coil includes a low-voltage winding liner, a low-voltage insulation skeleton and a low-voltage winding superconducting tape, and each low-voltage insulation skeleton has a first limit plate, and the first limit plate is used to axially limit the low-voltage winding superconducting tape; the high-voltage superconducting coil includes a high-voltage winding liner, a high-voltage insulation skeleton and a high-voltage winding superconducting tape, and each high-voltage insulation skeleton has a second limit plate, and the second limit plate is used to axially limit the high-voltage winding superconducting tape. The invention can prevent the low-voltage winding superconducting tape from shifting by the first limit plate; and can prevent the high-voltage winding superconducting tape from shifting by the second limit plate, thereby improving the safety and stability of the superconducting transformer.

Description

Technical Field

[0001] The invention relates to the technical field of superconducting power application, and more particularly to a coaxial horizontal superconducting transformer. Background Art

[0002] With the strategic advancement of carbon neutrality and carbon peak, the demand for more efficient and environmentally friendly transformers in modern power systems continues to increase. Traditional transformers are generally dry or oil-immersed transformers, which are heavy, have large losses, and are prone to fire. They need to be used in fire-proof and explosion-proof places. With the emergence of high-temperature superconducting materials, superconducting tapes can replace copper wire windings. Their zero resistance characteristics give them higher current density and lower losses. The number of coil turns is reduced, which improves space utilization. Applying superconducting technology to transformers can significantly improve transformer performance. Compared with conventional transformers, superconducting transformers have the advantages of low loss, light weight, small winding volume, environmental friendliness, and no fire hazard.

[0003] At present, there are still some problems with the current superconducting transformer. For example, the superconducting winding is a solenoid type, and the uneven distribution of the magnetic field leads to unbalanced voltage division; the larger current leads to increased electromagnetic force, resulting in magnet displacement or vibration, which reduces the safety and stability of the superconducting transformer. Summary of the invention

[0004] In view of this, the present invention provides a coaxial horizontal superconducting transformer, aiming to solve one of the problems in the above-mentioned background technology, prevent the magnetic field from shifting, and achieve uniform distribution of the magnetic field to balance the pressure of the superconducting windings.

[0005] In order to achieve the above object, the present invention adopts the following technical solution:

[0006] A coaxial horizontal superconducting transformer, comprising:

[0007] Iron core;

[0008] A transformer assembly, comprising a low-voltage superconducting coil and a high-voltage superconducting coil coaxially sleeved on the iron core, wherein the high-voltage superconducting coil is sleeved outside the low-voltage superconducting coil;

[0009] Wherein, the low-voltage superconducting coil comprises a low-voltage winding liner, a low-voltage insulating skeleton and a low-voltage winding superconducting tape, the low-voltage winding liner is sleeved on the iron core, the low-voltage insulating skeleton is provided with a plurality of them, the plurality of low-voltage insulating skeletons are sleeved on the low-voltage winding liner in sequence, each of the low-voltage insulating skeletons is sleeved with the low-voltage winding superconducting tape, each of the low-voltage insulating skeletons has a first limiting plate, and the first limiting plate is used to axially limit the low-voltage winding superconducting tape;

[0010] The high-voltage superconducting coil includes a high-voltage winding liner, a high-voltage insulating skeleton and a high-voltage winding superconducting tape. The high-voltage winding liner is sleeved outside the low-voltage winding superconducting tape. The high-voltage insulating skeleton is provided with multiple ones, and the multiple high-voltage insulating skeletons are sequentially sleeved on the high-voltage winding liner. The high-voltage winding superconducting tape is sleeved on each of the high-voltage insulating skeletons. Each of the high-voltage insulating skeletons has a second limiting plate, and the second limiting plate is used to axially limit the high-voltage winding superconducting tape.

[0011] Furthermore, the low-voltage insulation frame includes a first low-voltage insulator frame and a second low-voltage insulator frame, and the first low-voltage insulator frame and the second low-voltage insulator frame are clamped.

[0012] Furthermore, the coaxial horizontal superconducting transformer also includes a first support ring, a first support bar and a first bundling belt. A plurality of first support rings are provided, and the plurality of first support rings are arranged at intervals along the axial direction of the low-voltage winding liner. A plurality of low-voltage insulating skeletons are sleeved between two adjacent first support rings. A plurality of first support bars are provided, and the plurality of first support bars are all arranged along the axial direction of the low-voltage winding liner, and the plurality of first support bars are arranged in a ring array outside the low-voltage insulating skeleton and the low-voltage winding superconducting tape. The first bundling belt is provided outside the first support bar, and the first bundling belt is used to fasten the first support bar to the low-voltage insulating skeleton and the low-voltage winding superconducting tape.

[0013] Furthermore, the high-voltage insulation frame includes a first high-voltage insulator frame and a second high-voltage insulator frame, and the first high-voltage insulator frame and the second high-voltage insulator frame are clamped.

[0014] Furthermore, the coaxial horizontal superconducting transformer also includes a second support ring, a second support bar and a second bundling belt. A plurality of second support rings are provided, and the plurality of second support rings are arranged at intervals along the axial direction of the high-voltage winding liner. A plurality of high-voltage insulating skeletons are arranged between two adjacent second support rings. A plurality of second support bars are provided, and the plurality of second support bars are all arranged along the axial direction of the high-voltage winding liner, and the plurality of second support bars are arranged in a ring array outside the high-voltage insulating skeleton and the high-voltage winding superconducting tape. The second bundling belt is provided outside the second support bar, and the second bundling belt is used to fasten the second support bar to the high-voltage insulating skeleton and the high-voltage winding superconducting tape.

[0015] Furthermore, the coaxial horizontal superconducting transformer also includes a dewar, and the dewar includes an inner cylinder, an outer cylinder and an annular end cover;

[0016] The outer cylinder is sleeved on the outside of the inner cylinder, and two annular end covers are provided. The two annular end covers are respectively arranged at the two ends of the outer cylinder and the inner cylinder, and the end of the outer cylinder is connected to the end of the inner cylinder through the annular end covers. The inner cylinder, the outer cylinder and the two annular end covers enclose a sealed through cavity, the iron core is passed through the inner cylinder, the low-voltage winding liner and the high-voltage winding liner are both located in the sealed through cavity, and the low-voltage winding liner is sleeved on the inner cylinder.

[0017] Furthermore, the coaxial horizontal superconducting transformer also includes a cooling system, which includes a C-shaped shell, a first liquid nitrogen chamber, a second liquid nitrogen chamber and a tube bundle, the C-shaped shell is located in the sealed through cavity, the C-shaped shell is sleeved outside the high-voltage winding superconducting tape, the first liquid nitrogen chamber and the second liquid nitrogen chamber are respectively arranged at the two ends of the C-shaped shell, and the tube bundle is provided with multiple tube bundles, and the multiple tube bundles are all arranged inside the C-shaped shell, one end of the multiple tube bundles is communicated with the first liquid nitrogen chamber, and the other end of the multiple tube bundles is communicated with the second liquid nitrogen chamber, the first liquid nitrogen chamber is provided with two pipe interfaces, and the second liquid nitrogen chamber is provided with a liquid replenishment pipe interface.

[0018] Furthermore, the coaxial horizontal superconducting transformer also includes a clamping ring, which includes a base plate and a boss, the diameter of the boss is smaller than the diameter of the base plate, the side wall of the boss has an exchange hole, the end of the base plate away from the boss contacts the low-voltage winding liner through a first pressure ring, the boss passes through the annular end cover and extends into the inner cylinder, and the boss cooperates with the annular end cover and / or the inner cylinder.

[0019] Furthermore, the iron core is a frame-type structure, and two transformer assemblies are provided, and the two transformer assemblies are symmetrically sleeved on opposite sides of the frame-type structure.

[0020] It can be known from the above technical solutions that, compared with the prior art, the present invention discloses a coaxial horizontal superconducting transformer, which can fix the low-voltage winding superconducting tape by setting a first limit plate on the low-voltage insulation frame to prevent the low-voltage winding superconducting tape from shifting; and can fix the high-voltage winding superconducting tape by setting a second limit plate on the high-voltage insulation frame to prevent the high-voltage winding superconducting tape from shifting, thereby improving the safety and stability of the superconducting transformer. By respectively sleeve-mounting the low-voltage winding superconducting tape and the high-voltage winding superconducting tape on a single low-voltage insulation frame and a high-voltage insulation frame, the magnetic field distribution can be uniform. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on the provided drawings without paying creative work.

[0022] Figure 1 A schematic diagram of the structure of the assembly of the low-voltage superconducting coil and the high-voltage superconducting coil provided by the present invention;

[0023] Figure 2 A schematic diagram of the structure of a low voltage winding liner provided by the present invention;

[0024] Figure 3 A schematic diagram of the structure of a low-voltage superconducting coil provided by the present invention;

[0025] Figure 4 A schematic diagram of the structure of a low-voltage insulation skeleton provided by the present invention;

[0026] Figure 5 A schematic diagram of the structure of the low-voltage insulation frame and the low-voltage winding superconducting tape assembly provided by the present invention;

[0027] Figure 6 A schematic diagram of the structure of a high voltage winding liner provided by the present invention;

[0028] Figure 7 A schematic diagram of the structure of a high-voltage superconducting coil provided by the present invention;

[0029] Figure 8 A schematic diagram of the structure of a high-voltage insulation skeleton provided by the present invention;

[0030] Fig. 9 A schematic diagram of the structure of the high-voltage insulation frame and the high-voltage winding superconducting tape provided by the present invention;

[0031] Fig.10 A schematic structural diagram of a coaxial horizontal superconducting transformer equipped with a Dewar provided by the present invention;

[0032] Fig.11 A schematic diagram of the structure of the cooling system provided by the present invention;

[0033] Fig.12 A schematic diagram of the structure of the cooling system, low-pressure superconducting coil and high-pressure superconducting coil provided by the present invention after assembly;

[0034] Fig.13 A schematic diagram of the structure of the clamping ring provided by the present invention;

[0035] Fig.14 A schematic diagram of the structure of the Dewar end cover provided by the present invention;

[0036] Fig.15 A top view of the Dewar end cap provided by the present invention;

[0037] Fig.16 A schematic diagram of the structure of a coaxial horizontal superconducting transformer provided by the present invention;

[0038] Fig.17 The schematic diagram of the high pressure to low pressure conversion provided by the present invention.

[0039] Among them: 1 is the iron core; 2 is the low-voltage superconducting coil; 21 is the low-voltage winding bushing; 22 is the low-voltage insulation frame; 221 is the first low-voltage insulator frame; 222 is the second low-voltage insulator frame; 23 is the low-voltage winding superconducting tape; 3 is the high-voltage superconducting coil; 31 is the high-voltage winding bushing; 32 is the high-voltage insulation frame; 321 is the first high-voltage insulator frame; 322 is the second high-voltage insulator frame; 33 is the high-voltage winding superconducting tape; 4 is the first limit plate; 5 is the second limit plate; 6 is the first support ring; 7 is the first support ring; A support bar; 8 is a first strapping belt; 9 is a second support ring; 10 is a second support bar; 11 is a second strapping belt; 12 is a Dewar; 13 is a cooling system; 131 is a C-type shell; 132 is a first liquid nitrogen chamber; 133 is a second liquid nitrogen chamber; 134 is a tube bundle; 14 is a clamping ring; 141 is a base plate; 142 is a boss; 15 is a high-voltage wiring sleeve; 16 is a low-voltage wiring sleeve; 17 is a liquid nitrogen inlet pipe end; 18 is a liquid nitrogen outlet pipe end; 19 is a liquid nitrogen supplement pipe end; 20 is a Dewar end cover. DETAILED DESCRIPTION

[0040] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0041] See also Figure 1-3 and 6-7, an embodiment of the present invention discloses a coaxial horizontal superconducting transformer, including: an iron core 1 and a transformer assembly.

[0042] The transformer assembly includes a low-voltage superconducting coil 2 and a high-voltage superconducting coil 3 coaxially sleeved on an iron core 1, and the high-voltage superconducting coil 3 is sleeved outside the low-voltage superconducting coil 2;

[0043] Among them, the low-voltage superconducting coil 2 includes a low-voltage winding liner 21, a low-voltage insulation skeleton 22 and a low-voltage winding superconducting tape 23. The low-voltage winding liner 21 is sleeved on the iron core 1. There are multiple low-voltage insulation skeletons 22, and the multiple low-voltage insulation skeletons 22 are sequentially sleeved on the low-voltage winding liner 21. Each low-voltage insulation skeleton 22 is sleeved with a low-voltage winding superconducting tape 23, and each low-voltage insulation skeleton 22 has a first limiting plate 4, which is used to axially limit the low-voltage winding superconducting tape 23;

[0044] The high-voltage superconducting coil 3 includes a high-voltage winding liner 31, a high-voltage insulating skeleton 32 and a high-voltage winding superconducting tape 33. The high-voltage winding liner 31 is sleeved on the outside of the low-voltage winding superconducting tape 23. There are multiple high-voltage insulating skeletons 32, and the multiple high-voltage insulating skeletons 32 are sequentially sleeved on the high-voltage winding liner 31. Each high-voltage insulating skeleton 32 is sleeved with a high-voltage winding superconducting tape 33. Each high-voltage insulating skeleton 32 has a second limiting plate 5, and the second limiting plate 5 is used to axially limit the high-voltage winding superconducting tape 33.

[0045] In this embodiment, the low-voltage winding liner 21 and the high-voltage winding liner 31 are both made of epoxy resin material, a first limit plate 4 is arranged on the low-voltage insulating skeleton 22 along its circumferential direction, and a second limit plate 5 is arranged on the high-voltage insulating skeleton 32 along its circumferential direction. The adjacent low-voltage insulating skeletons 22 and high-voltage insulating skeletons 32 are mutually clamped, so that the low-voltage winding superconducting tape 23 can be pressurized and wound on the low-voltage insulating skeleton 22 through the first limit plate 4 on the adjacent low-voltage insulating skeleton 22. Similarly, the high-voltage winding superconducting tape 33 is pressurized and wound on the high-voltage insulating skeleton 32 through the second limit plate 5 on the high-voltage insulating skeleton 32. The low-voltage winding superconducting tape 23 and the high-voltage winding superconducting tape 33 are both made of Y-series superconducting tape and wrapped with insulating tape.

[0046] See also Figure 4-5 In this embodiment, the low-voltage superconducting coil 2 is a low-voltage double-pancake superconducting coil. The low-voltage insulating frame 22 in the low-voltage double-pancake superconducting coil includes a first low-voltage insulator frame 221 and a second low-voltage insulator frame 222. The first low-voltage insulator frame 221 and the second low-voltage insulator frame 222 are clamped, and low-voltage winding superconducting tapes 23 are respectively arranged on the first low-voltage insulator frame 221 and the second low-voltage insulator frame 222. The low-voltage winding superconducting tapes 23 on the first low-voltage insulator frame 221 and the second low-voltage insulator frame 222 are connected in series with each other, and the first low-voltage insulator frame 221, the second low-voltage insulator frame 222, and the low-voltage winding superconducting tapes 23 on the first low-voltage insulator frame 221 and the second low-voltage insulator frame 222 are bound by glass ribbon to form a double-pancake structure, thereby providing radial force for the low-voltage winding superconducting tape 23 to prevent the low-voltage winding superconducting tape 23 from shifting.

[0047] See also Figure 3 According to some embodiments of the present invention, the coaxial horizontal superconducting transformer further includes a first support ring 6, a first support bar 7 and a first bundling belt 8, wherein a plurality of first support rings 6 are provided, and the plurality of first support rings 6 are arranged at intervals along the axial direction of the low-voltage winding liner 21, and a plurality of low-voltage insulating skeletons 22 are sleeved between two adjacent first support rings 6, a plurality of first support bars 7 are provided, and the plurality of first support bars 7 are all arranged along the axial direction of the low-voltage winding liner 21, and the plurality of first support bars 7 are arranged in an annular array outside the low-voltage insulating skeleton 22 and the low-voltage winding superconducting tape 23, wherein the first low-voltage insulator skeleton 221 and the second The first limiting plates 4 are arranged at intervals on the low-voltage insulator skeleton 222, and the first support bar 7 is arranged in the gap between the first limiting plates 4 arranged at intervals. At the same time, the inner wall of the first support bar 7 is in contact with the low-voltage winding superconducting tape 23, which is used to press the low-voltage winding superconducting tape 23. The first bundling tape 8 is arranged outside the first support bar 7. The first bundling tape 8 is used to fasten the first support bar 7 to the low-voltage insulating skeleton 22 and the low-voltage winding superconducting tape 23. Through the arrangement of the first support bar 7 and the first bundling tape 8, the low-voltage insulating skeleton 22 and the low-voltage winding superconducting tape 23 can be stably fixed on the low-voltage winding liner 21.

[0048] See also Figure 8-9 According to some embodiments of the present invention, a high-voltage insulation skeleton 32 includes a first high-voltage insulator skeleton 321 and a second high-voltage insulator skeleton 322, the first high-voltage insulator skeleton 321 and the second high-voltage insulator skeleton 322 are clamped, and high-voltage winding superconducting tapes 33 are respectively arranged on the first high-voltage insulator skeleton 321 and the second high-voltage insulator skeleton 322, and the high-voltage winding superconducting tapes 33 on the first high-voltage insulator skeleton 321 and the second high-voltage insulator skeleton 322 are connected in series with each other, and the first high-voltage insulator skeleton 321, the second high-voltage insulator skeleton 322 and the high-voltage winding superconducting tapes 33 on the first high-voltage insulator skeleton 321 and the second high-voltage insulator skeleton 322 are tied together by glass ribbons to form a double pancake structure, thereby providing radial force for the high-voltage winding superconducting tape 33 to prevent the high-voltage winding superconducting tape 33 from shifting.

[0049] See also Figure 7The coaxial horizontal superconducting transformer further comprises a second support ring 9, a second support bar 10 and a second bundling belt 11, wherein a plurality of second support rings 9 are provided, and the plurality of second support rings 9 are arranged at intervals along the axial direction of the high-voltage winding liner 31, and a plurality of high-voltage insulating skeletons 32 are arranged between two adjacent second support rings 9, a plurality of second support bars 10 are provided, and the plurality of second support bars 10 are arranged along the axial direction of the high-voltage winding liner 31, and the plurality of second support bars 10 are arranged in an annular array outside the high-voltage insulating skeleton 32 and the high-voltage winding superconducting tape 33, wherein the first high-voltage insulator skeleton 321 and The second high-voltage insulator skeleton 322 is spaced apart with a second limiting plate 5, and the second support bar 10 is arranged in the gap between the spaced apart second limiting plates 5, and at the same time, the inner wall of the second support bar 10 is in contact with the high-voltage winding superconducting tape 33, and the second bundling tape 11 is arranged outside the second support bar 10, and the second bundling tape 11 is used to fasten the second support bar 10 to the high-voltage insulation skeleton 32 and the high-voltage winding superconducting tape 33. By setting the second support bar 10 and the second bundling tape 11, the high-voltage insulation skeleton 32 and the high-voltage winding superconducting tape 33 can be stably fixed on the high-voltage winding liner 31.

[0050] See also Fig.10 In this embodiment, the coaxial horizontal superconducting transformer further includes a dewar 12, and the dewar 12 includes an inner cylinder, an outer cylinder and an annular end cover;

[0051] The outer cylinder is sleeved outside the inner cylinder, and two annular end covers are provided, which are respectively arranged at the two ends of the outer cylinder and the inner cylinder. The end of the outer cylinder is connected to the end of the inner cylinder through the annular end covers. The inner cylinder, the outer cylinder and the two annular end covers enclose a sealed through cavity. The iron core 1 is passed through the inner cylinder, and the low-voltage winding liner 21 and the high-voltage winding liner 31 are both located in the sealed through cavity. The low-voltage winding liner 21 is sleeved on the inner cylinder.

[0052] See also Figure 11-12 In this embodiment, the coaxial horizontal superconducting transformer further includes a cooling system 13, which includes a C-shaped shell 131, a first liquid nitrogen chamber 132, a second liquid nitrogen chamber 133 and a tube bundle 134. The C-shaped shell 131 is located in the sealed through cavity, and the C-shaped shell 131 is sleeved outside the high-voltage winding superconducting tape 33. The first liquid nitrogen chamber 132 and the second liquid nitrogen chamber 133 are respectively arranged at both ends of the C-shaped shell 131. A plurality of tube bundles 134 are provided, and the plurality of tube bundles 134 are all arranged inside the C-shaped shell 131. One end of the plurality of tube bundles 134 is communicated with the first liquid nitrogen chamber 132, and the other end of the plurality of tube bundles 134 is communicated with the second liquid nitrogen chamber 133. Two pipe interfaces are arranged on the first liquid nitrogen chamber 132, and a liquid replenishing pipe interface is arranged on the second liquid nitrogen chamber 133.

[0053] See also Figure 13-15In this embodiment, the coaxial horizontal superconducting transformer also includes a clamping ring 14, which includes a base plate 141 and a boss 142. The diameter of the boss 142 is smaller than the diameter of the base plate 141. The side wall of the boss 142 has an exchange hole. The end of the base plate 141 away from the boss 142 contacts the low-voltage winding liner 21 through the first pressure ring. The boss 142 passes through the annular end cover and extends into the inner cylinder. The boss 142 cooperates with the annular end cover and / or the inner cylinder. Among them, since the coaxial horizontal superconducting transformer is assembled at room temperature, but during use, the sealed cavity surrounded by the inner cylinder, the outer cylinder and the two annular end covers is filled with liquid nitrogen, which causes the inner cylinder, the low-voltage winding liner 21 and the high-voltage winding liner 31 to shrink to a certain extent. When the inner cylinder, the low-voltage winding liner 21 and the high-voltage winding liner 31 shrink, the boss 142 cooperates with the annular end cover and / or the inner cylinder (friction connection), which can still ensure a certain friction connection strength at this location during the shrinkage process.

[0054] Specifically, a second pressure ring is provided at the opposite end of the low-voltage winding liner 21 and the high-voltage winding liner 31, and a plurality of pull rods are provided between the first pressure ring and the second pressure ring, wherein a part of the pull rods are located between the low-pressure superconducting coil 2 and the high-voltage superconducting coil 3 and are arranged in a circular array axially along the inner cylinder, for axially fixing the low-pressure superconducting coil 2, and another part of the pull rods are located between the high-voltage superconducting coil 3 and the C-type shell 131 and are arranged in a circular array axially along the inner cylinder, for axially fixing the high-voltage superconducting coil 3, and the exchange hole on the side wall of the boss 142 is used to realize the connection between the inner and outer spaces of the high-voltage superconducting coil 3, that is, the first space formed between the low-pressure superconducting coil 2 and the high-voltage superconducting coil 3, and the second space formed between the high-voltage superconducting coil 3 and the C-type shell 131, the exchange hole can maintain the normal circulation and interaction of liquid nitrogen in the first space and the second space, which is conducive to uniform heat dissipation, and a low-voltage lead is provided in the first space, and a high-voltage lead is provided in the second space, and the low The pressure lead is used to connect with the low-voltage winding superconducting tape 23, and the high-voltage lead is used to connect with the high-voltage winding superconducting tape 33. The low-voltage lead can be provided with multiple roots according to the number of low-voltage winding superconducting tapes 23 connected in series and parallel. Similarly, two high-voltage leads are provided. The high-voltage lead and the low-voltage lead are finally passed through the annular end cover of the dewar 12. The dewar end cover 20 is connected to the annular end cover at one end of the high-voltage lead and the low-voltage lead, and the high-voltage wiring sleeve 15 and the low-voltage wiring sleeve are provided on the dewar end cover 20. 16, a liquid nitrogen inlet pipe end 17, a liquid nitrogen outlet pipe end 18 and a liquid nitrogen supplement pipe end 19, wherein the high-voltage wiring pipe sleeve 15 is connected to the high-voltage lead, the low-voltage wiring pipe sleeve 16 is connected to the low-voltage lead, the liquid nitrogen inlet pipe end 17 is connected to one of the pipe interfaces on the first liquid nitrogen chamber 132, the liquid nitrogen outlet pipe end 18 is connected to another pipe interface on the first liquid nitrogen chamber 132, and the liquid nitrogen supplement pipe end 19 is connected to the liquid replenishment pipe interface provided on the second liquid nitrogen chamber 133 through a pipeline.

[0055] See also Fig.16 According to some embodiments of the present invention, the iron core 1 is a frame-type structure, and two transformer assemblies are provided. The two transformer assemblies are symmetrically arranged on opposite sides of the frame-type structure. Through the symmetrically arranged transformer assemblies, firstly, when one of the transformer assemblies fails, the other transformer assembly serves as a backup; secondly, the two transformer assemblies can work simultaneously to realize power supply to multiple electrical equipment.

[0056] See also Fig.17 The coaxial horizontal superconducting transformer of the present invention is further explained below through a specific method of use:

[0057] Take the connected high voltage as 25KV as the main one, output two low voltages of 1.9KV, and connect a 30KV lightning arrester to the high voltage bus as an example.

[0058] The eight high-voltage winding superconducting tapes that are arranged in sequence are selected to be connected in series in sequence, that is, the high-voltage winding superconducting tapes on the four high-voltage double-pancake superconducting coils are connected in series in sequence and connected to a high voltage of 25KV. The eight low-voltage winding superconducting tapes corresponding to the eight high-voltage winding superconducting tapes are connected in series from the first low-voltage winding superconducting tape to the fourth low-voltage winding superconducting tape in sequence to form a first low-voltage winding superconducting tape, and the fifth low-voltage winding superconducting tape to the eighth low-voltage winding superconducting tape are connected in series in sequence to form a second low-voltage winding superconducting tape, and then the first low-voltage winding superconducting tape and the second low-voltage winding superconducting tape are connected in parallel to output a low voltage of 1.9KV; similarly, the remaining eight high-voltage winding superconducting tapes are selected to be connected in series in sequence and connected to a high voltage of 25KV, and the eight low-voltage winding superconducting tapes corresponding to the eight high-voltage winding superconducting tapes are processed in the same manner as described above, and finally output a low voltage of 1.9KV. For different low voltage values ​​required, other numbers of high voltage winding superconducting tapes can be selected for series connection as needed, and other numbers of low voltage winding superconducting tapes can be selected for first series connection and then parallel connection to output different low voltage values.

[0059] In this specification, each embodiment is described in a progressive manner, and each embodiment focuses on the differences from other embodiments. The same or similar parts between the embodiments can be referred to each other. For the device disclosed in the embodiment, since it corresponds to the method disclosed in the embodiment, the description is relatively simple, and the relevant parts can be referred to the method part.

[0060] The above description of the disclosed embodiments enables one skilled in the art to implement or use the present invention. Various modifications to these embodiments will be apparent to one skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the present invention. Therefore, the present invention will not be limited to the embodiments shown herein, but rather to the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A coaxial horizontal superconducting transformer, characterized in that: include: Iron core; A transformer assembly, comprising a low-voltage superconducting coil and a high-voltage superconducting coil coaxially sleeved on the iron core, wherein the high-voltage superconducting coil is sleeved outside the low-voltage superconducting coil; Wherein, the low-voltage superconducting coil comprises a low-voltage winding liner, a low-voltage insulating skeleton and a low-voltage winding superconducting tape, the low-voltage winding liner is sleeved on the iron core, the low-voltage insulating skeleton is provided with a plurality of them, the plurality of low-voltage insulating skeletons are sleeved on the low-voltage winding liner in sequence, each of the low-voltage insulating skeletons is sleeved with the low-voltage winding superconducting tape, each of the low-voltage insulating skeletons has a first limiting plate, and the first limiting plate is used to axially limit the low-voltage winding superconducting tape; The high-voltage superconducting coil comprises a high-voltage winding liner, a high-voltage insulating skeleton and a high-voltage winding superconducting tape. The high-voltage winding liner is sleeved outside the low-voltage winding superconducting tape. The high-voltage insulating skeleton is provided with a plurality of them. The plurality of high-voltage insulating skeletons are sleeved on the high-voltage winding liner in sequence. The high-voltage winding superconducting tape is sleeved on each of the high-voltage insulating skeletons. Each of the high-voltage insulating skeletons has a second limiting plate, and the second limiting plate is used to axially limit the high-voltage winding superconducting tape. The low-voltage insulation frame comprises a first low-voltage insulator frame and a second low-voltage insulator frame, and the first low-voltage insulator frame and the second low-voltage insulator frame are clamped; It also includes a first support ring, a first support bar and a first strapping belt, wherein a plurality of the first support rings are provided, and the plurality of the first support rings are arranged at intervals along the axial direction of the low-voltage winding liner, and a plurality of the low-voltage insulating skeletons are sleeved between two adjacent first support rings, and a plurality of the first support bars are provided, and the plurality of the first support bars are all arranged along the axial direction of the low-voltage winding liner, and the plurality of the first support bars are arranged in an annular array outside the low-voltage insulating skeleton and the low-voltage winding superconducting tape, and the first strapping belt is provided outside the first support bar, and the first strapping belt is used to fasten the first support bar to the low-voltage insulating skeleton and the low-voltage winding superconducting tape; The high-voltage insulation frame comprises a first high-voltage insulator frame and a second high-voltage insulator frame, and the first high-voltage insulator frame and the second high-voltage insulator frame are clamped; It also includes a second support ring, a second support bar and a second strapping belt. There are multiple second support rings, which are arranged at intervals along the axial direction of the high-voltage winding liner. A plurality of the high-voltage insulating skeletons are arranged between two adjacent second support rings. There are multiple second support bars, which are all arranged along the axial direction of the high-voltage winding liner, and the plurality of second support bars are arranged in a ring array outside the high-voltage insulating skeleton and the high-voltage winding superconducting tape. The second strapping belt is arranged outside the second support bar, and the second strapping belt is used to fasten the second support bar to the high-voltage insulating skeleton and the high-voltage winding superconducting tape.

2. The coaxial horizontal superconducting transformer according to claim 1, characterized in that: Also included is a dewar, the dewar comprising an inner cylinder, an outer cylinder and an annular end cover; The outer cylinder is sleeved on the outside of the inner cylinder, and two annular end covers are provided. The two annular end covers are respectively arranged at the two ends of the outer cylinder and the inner cylinder, and the end of the outer cylinder is connected to the end of the inner cylinder through the annular end covers. The inner cylinder, the outer cylinder and the two annular end covers enclose a sealed through cavity, the iron core is passed through the inner cylinder, the low-voltage winding liner and the high-voltage winding liner are both located in the sealed through cavity, and the low-voltage winding liner is sleeved on the inner cylinder.

3. The coaxial horizontal superconducting transformer according to claim 2, characterized in that: The invention also includes a cooling system, which includes a C-shaped shell, a first liquid nitrogen chamber, a second liquid nitrogen chamber and a tube bundle. The C-shaped shell is located in the sealed through cavity, and the C-shaped shell is sleeved outside the high-voltage winding superconducting tape. The first liquid nitrogen chamber and the second liquid nitrogen chamber are respectively arranged at two ends of the C-shaped shell. There are multiple tube bundles, and the multiple tube bundles are all arranged inside the C-shaped shell. One end of the multiple tube bundles is communicated with the first liquid nitrogen chamber, and the other end of the multiple tube bundles is communicated with the second liquid nitrogen chamber. Two pipe interfaces are arranged on the first liquid nitrogen chamber, and a liquid replenishing pipe interface is arranged on the second liquid nitrogen chamber.

4. The coaxial horizontal superconducting transformer according to claim 3, characterized in that: It also includes a clamping ring, which includes a base plate and a boss. The diameter of the boss is smaller than the diameter of the base plate. The side wall of the boss has an exchange hole. The end of the base plate away from the boss contacts the low-voltage winding liner through a first pressure ring. The boss passes through the annular end cover and extends into the inner cylinder. The boss cooperates with the annular end cover and / or the inner cylinder.

5. The coaxial horizontal superconducting transformer according to claim 1, characterized in that: The iron core is a frame-type structure, and two transformer assemblies are provided. The two transformer assemblies are symmetrically sleeved on opposite sides of the frame-type structure.

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