Solid state transformer

Abstract

The solid-state transformer comprises a cabinet body, a medium-voltage input part, a power part and a low-voltage output part are arranged in the cabinet body, and any one of the medium-voltage input part, the power part and the low-voltage output part is adjacent to the other two parts. According to the solid-state transformer, any one of the medium-voltage input part, the power part and the low-voltage output part is adjacent to the other two parts, and compared with the scheme of the related technology, the waste space in the medium-voltage input part and the low-voltage output part can be reduced, the size of the solid-state transformer is reduced, and the power density of the solid-state transformer is improved.

Description

Technical Field

[0001] The present application relates to the technical field of transformers, and in particular to a solid-state transformer. Background Art

[0002] A transformer is a device used to change AC voltage. With the continuous advancement of science and technology, transformers are constantly being improved, and a solid-state transformer has been proposed in related technical solutions. Compared to traditional transformers, solid-state transformers offer advantages such as environmental friendliness, compact size, the absence of transformer oil, and low pollution. Furthermore, solid-state transformers can communicate over the Internet, adjusting voltage and frequency within a certain range, improving the intelligence level of power grid equipment and contributing to the intelligentization of the power grid. Solid-state transformers have broad application prospects in data centers, vehicle charging, energy storage, chemical industry, and other fields.

[0003] However, the solid-state transformer in the related art is large in size and has a wasted internal space, so the power density of the solid-state transformer is low. Utility Model Content

[0004] In order to overcome the above-mentioned defects in the related art, the purpose of the present application is to provide a solid-state transformer, which is conducive to reducing the volume of the solid-state transformer, reducing the waste of internal space, and improving the power density of the solid-state transformer.

[0005] The present application provides a solid-state transformer, comprising a cabinet, wherein a medium voltage input part, a power part and a low voltage output part are arranged in the cabinet, and any one of the medium voltage input part, the power part and the low voltage output part is arranged adjacent to the other two.

[0006] In a possible implementation, the medium voltage input part and the low voltage output part are both located on the same side of the power part, and the medium voltage input part and the low voltage output part are isolated from each other by a first isolation member.

[0007] In a possible implementation, the power part and the low-voltage output part are both located on the same side of the medium-voltage input part, and the medium-voltage input part and the low-voltage output part are isolated from each other by a first isolation member.

[0008] In a possible implementation, the power part and the medium-voltage input part are both located on the same side of the low-voltage output part, and the medium-voltage input part and the low-voltage output part are isolated from each other by a first isolation member.

[0009] In one possible implementation, the medium voltage input part and the low voltage output part are located on one side of the power part along the first direction, the first isolation member is arranged perpendicular to the second direction to isolate the medium voltage input part and the low voltage output part from each other, and the first direction and the second direction are perpendicular to each other.

[0010] In one possible implementation, the medium voltage input part and the low voltage output part are located on one side of the power part along the third direction, the first isolation member is arranged perpendicular to the second direction to isolate the medium voltage input part and the low voltage output part from each other, and the second direction and the third direction are perpendicular to each other.

[0011] In one possible implementation, multiple power modules are provided in the power unit. Along the second direction, the power module has a medium-voltage side and a low-voltage side. The medium-voltage input unit is arranged close to the medium-voltage side of the power module, and the low-voltage output unit is arranged close to the low-voltage side of the power module. The medium-voltage input unit and the medium-voltage side of the power module are isolated from each other by a second isolation member.

[0012] In a possible implementation, the first isolating member is a metal member; and the second isolating member is an insulating member.

[0013] In a possible implementation, the first isolation member includes a carbon steel plate or an aluminum-zinc-clad plate.

[0014] In a possible implementation, the medium voltage input part includes an input copper busbar, a circuit breaker, and a reactor. The input copper busbar passes through the circuit breaker and the reactor in sequence and is connected to the medium voltage side of the power module.

[0015] In a possible implementation, the low-voltage output portion includes an output copper busbar and a control module, the output copper busbar is connected to the low-voltage side of the power module, and the control module is communicatively connected to the circuit breaker, the reactor, and the power module.

[0016] In one possible implementation, the cabinet body includes a top plate and a bottom plate arranged relative to each other along a third direction, the low-pressure output part is provided with an air inlet, the air inlet is arranged close to the bottom plate, a ventilation structure is provided on the first isolation member, and an air outlet is provided on the top plate, and the first direction and the second direction are perpendicular to each other.

[0017] In one possible implementation, the air inlet is arranged on one side of the low-pressure output part along the second direction, the ventilation structure is arranged at one end of the first isolation part close to the bottom plate, and the air outlet includes a first air outlet and a second air outlet, the first air outlet is connected to the low-pressure output part, and the second air outlet is connected to the medium-pressure input part.

[0018] In one possible implementation, a duct dividing plate perpendicular to the third direction is further provided in the low-pressure output part, and the duct dividing plate allows part of the wind from the air inlet to enter the low-pressure output part, and another part of the wind from the air inlet to enter the medium-pressure input part after passing through the ventilation structure.

[0019] In a possible implementation, a first fan and a second fan are further provided on the top plate, the first fan is connected to the first air outlet, and the second fan is connected to the second air outlet.

[0020] In a possible implementation, an anti-direct-view structure is provided in the ventilation structure to prevent human eyes from directly observing the medium-pressure input portion along the air inlet.

[0021] In one possible implementation, the anti-direct view structure includes a plate body, multiple first shielding plates and multiple second shielding plates, the plate body is provided with multiple channels arranged at intervals along the third direction, the multiple first shielding plates and the multiple second shielding plates are arranged one by one on both sides of the plate body along the second direction, the first shielding plates and the second shielding plates are both inclined to the plate body, and the first shielding plates and the second shielding plates are used to shield the corresponding channels in the second direction.

[0022] In a possible implementation, the cabinet further includes a top plate, and a wiring box is provided on the top plate, and the wiring box is connected to the medium voltage input part.

[0023] The present application provides a solid-state transformer, including a cabinet, wherein a medium-voltage input portion, a power portion, and a low-voltage output portion are disposed within the cabinet, wherein each of the medium-voltage input portion, the power portion, and the low-voltage output portion is disposed adjacent to the other two. By disposing each of the medium-voltage input portion, the power portion, and the low-voltage output portion adjacent to the other two, the present application can reduce wasted space within the medium-voltage input portion and the low-voltage output portion, thereby reducing the volume of the solid-state transformer and thereby facilitating an increase in the power density of the solid-state transformer, compared to solutions in related arts. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] In order to more clearly illustrate the technical solutions in the embodiments of the present application or related technologies, the following is a brief introduction to the drawings required for use in the embodiments or related technical descriptions. Obviously, the drawings described below are some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without any creative work.

[0025] Figure 1 A simplified structural diagram of a solid-state transformer in the related art;

[0026] Figure 2 for Figure 1 A top view of

[0027] Figure 3 A top view of a solid-state transformer provided in one embodiment of the present application;

[0028] Figure 4 for Figure 3 Axonometric drawing of

[0029] Figure 5 for Figure 4 The structural diagram of the low-voltage output section is omitted;

[0030] Figure 6 for Figure 3 Schematic diagram of wind flow in the solid-state transformer shown;

[0031] Figure 7 A schematic diagram of an anti-direct-viewing structure provided in one embodiment of the present application;

[0032] Figure 8 for Figure 7 AA cross-section of

[0033] Figure 9 A front view of a solid-state transformer provided in another embodiment of the present application;

[0034] Figure 10 A top view of a solid-state transformer provided in another embodiment of the present application;

[0035] Figure 11 A schematic diagram of a solid-state transformer provided in yet another embodiment of the present application;

[0036] Figure 12 A schematic diagram of a solid-state transformer provided in yet another embodiment of the present application.

[0037] Reference numerals:

[0038] 10-cabinet; 11-top plate; 111-first air outlet; 112-second air outlet; 12-bottom plate; 13-wiring box;

[0039] 100 - medium voltage input; 101 - second fan; 110 - input copper busbar; 120 - circuit breaker; 130 - reactor;

[0040] 200-power unit;

[0041] 300 - low-pressure output unit; 301 - first fan; 310 - output copper busbar; 320 - control module; 330 - air inlet; 340 - air duct partition plate;

[0042] 400 - first isolation member; 410 - anti-direct view structure; 411 - plate; 412 - first shielding plate; 413 - second shielding plate;

[0043] 500- second isolation member;

[0044] 600-first fan;

[0045] 700-second fan;

[0046] X-first direction; Y-second direction; Z-third direction. DETAILED DESCRIPTION

[0047] In order to make the purpose, technical solutions and advantages of the embodiments of the present application clearer, the technical solutions in the embodiments of the present application will be clearly and completely described below in combination with the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, not all of the embodiments.

[0048] Based on the embodiments in this application, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of this application. In the absence of conflict, the following embodiments and features in the embodiments can be combined with each other.

[0049] As described in the background art, the solid-state transformer in the related art is large in size and has wasted internal space, so the power density of the solid-state transformer is low.

[0050] Please refer to Figure 1 and Figure 2 Specifically, the solid-state transformer in the related art includes a cabinet 10, in which a low-voltage output part 300, a power part 200 and a medium-voltage input part 100 are sequentially arranged along the first direction X. The low-voltage output part 300, the power part 200 and the medium-voltage input part 100 are respectively arranged in a sub-cabinet. The cabinet 10 is provided with a cabinet door (not shown in the figure) on the outer surface perpendicular to the Y direction, and a side panel is provided on the outer surface perpendicular to the X direction. When designing the cabinet 10, the profile frame of the sub-cabinet constituting the medium-voltage input part 100, the power part 200 and the low-voltage output part 300 needs to keep the same dimensions in the second direction Y and the third direction Z. The dimensions in the first direction X can be adjusted according to needs, but the three sub-cabinets are also basically consistent. Since there are fewer electronic components in the sub-cabinet where the medium voltage input unit 100 and the low voltage output unit 300 are located compared to the power unit 200, there is a certain amount of wasted space in the sub-cabinets where the medium voltage input unit 100 and the low voltage output unit 300 are located (such as areas A1 and A2 in the sub-cabinet where the medium voltage input unit 100 is located, and area B in the sub-cabinet where the low voltage output unit 300 is located), which results in a low power density of the solid-state transformer. At the same time, because the sub-cabinets of the medium voltage input unit 100, the power unit 200, and the low voltage output unit 300 need to be consistent in two dimensions, the size of the overall cabinet is relatively fixed and inflexible, making it difficult to adjust the size of the overall cabinet according to different cabinet usage and placement scenarios. The space used to place the cabinet cannot be fully utilized, resulting in a low power density of the solid-state transformer.

[0051] In addition, in the related technology, a first isolation member 400 is provided between the power unit 200 and the medium-voltage input unit 100, and a second isolation member 500 is provided between the power unit 200 and the low-voltage output unit 300, so that the medium-voltage input unit 100, the power unit 200 and the low-voltage output unit 300 are combined with the cabinet body 10 so that the medium-voltage input unit 100, the power unit 200 and the low-voltage output unit 300 all have their own independent air ducts, preventing the power unit 200 from dissipating heat into the medium-voltage input unit 100 or the low-voltage output unit 300 when in use. Figure 2 The arrows in the middle show the direction of wind flow. Figure 2 It can be seen that the air duct of the solid-state transformer in the related art is generally arranged along the second direction Y, and the wind enters from one side of the solid-state transformer along the second direction Y and flows out from the other side of the second direction Y (wherein, the medium-voltage input part 100 can achieve wind traction through the first fan 301, the power part 200 can achieve wind traction by using the fan of the internal power module itself, and the low-voltage output part 300 achieves wind traction through two second fans 101). Since the heat generated by the electronic components will flow along the third direction Z, which is perpendicular to the direction of the air duct, the direction of the air duct is along the Y direction, and devices and mounting plates are arranged perpendicular to the Y direction, which block the air duct and cause heat accumulation in some heating devices. Therefore, the solid-state transformer in the related art still has the problem of poor heat dissipation.

[0052] In view of this, the embodiment of the present application aims to provide a solid-state transformer. By arranging any one of the medium-voltage input part, the power part, and the low-voltage output part adjacent to the other two, compared with the solutions of the related art, the wasted space within the medium-voltage input part and the low-voltage output part can be reduced. The three only need to be consistent in one of the first direction X, the second direction Y, and the third direction Z, and do not need to be consistent in the second direction dimension. This can save the internal space waste caused by the three boundaries being consistent in the second direction dimension. The volume of the solid-state transformer is reduced, which is conducive to improving the power density of the solid-state transformer. At the same time, since the medium-voltage input part 100, the power part 200, and the low-voltage output part 300 only need to be consistent in one direction dimension, the size setting of the overall cabinet is more flexible. The size of the overall cabinet can be adjusted according to different cabinet usage and placement scenarios, and the space used to place the cabinet can be fully utilized, thereby improving the power density of the solid-state transformer.

[0053] The following will describe the contents of the embodiments of the present application in detail with reference to the accompanying drawings, so that those skilled in the art can understand the contents of the present application in more detail. It should be noted that in the description of this embodiment, the first direction X, the second direction Y and the third direction Z are three different directions in a three-dimensional space. For example, the first direction X, the second direction Y and the third direction Z can be perpendicular to each other, and the third direction Z can be a vertical direction, for example. Generally, the cabinet body is provided with a cabinet door on the outer surface perpendicular to the Y direction, and a side panel is provided on the outer surface perpendicular to the X direction (to show the internal structure of the cabinet body, Figure 3-Figure 9(The cabinet door and side panels are not shown in the figure) The power module is inserted into the cabinet along the second direction Y.

[0054] Please refer to Figure 3 、 Figure 4 、 Figure 9 、 Figure 10 、 Figure 11 and Figure 12 This embodiment provides a solid-state transformer, including a cabinet 10. The cabinet 10 can be formed by welding metal profiles, for example; the cabinet 10 is generally in the shape of a rectangular parallelepiped. The cabinet 10 can also be made of non-metallic materials, such as plastic, but is preferably made of metal profiles. A medium-voltage input part 100, a power part 200, and a low-voltage output part 300 are provided in the cabinet 10. It should be noted that the interior of the cabinet 10 can be divided into a medium-voltage input part 100, a power part 200, and a low-voltage output part 300 based on the functions realized by different areas in the cabinet 10. The medium-voltage input part 100, the power part 200, and the low-voltage output part 300 can be respectively arranged in relatively independent sub-cabinets separated by plates, or any two of them can be arranged in the same sub-cabinet. Alternatively, no sub-cabinet is provided in the cabinet, and the medium-voltage input part 100, the power part 200, and the low-voltage output part 300 are all located in a cabinet that is connected.

[0055] In this embodiment, any one of the medium voltage input part 100 , the power part 200 and the low voltage output part 300 is arranged adjacent to the other two.

[0056] It can be understood that, by arranging any one of the medium voltage input part 100, the power part 200 and the low voltage output part 300 adjacent to the other two, this embodiment can reduce the wasted space A1 and A2 areas in the sub-cabinet where the medium voltage input part 100 is located and the wasted space B area in the sub-cabinet where the low voltage output part 300 is located, thereby reducing the volume of the solid-state transformer and improving the power density of the solid-state transformer.

[0057] Please refer to Figure 3 、 Figure 4 、 Figure 9 and Figure 10 In one possible implementation, the medium voltage input part 100 and the low voltage output part 300 of this embodiment are both located on the same side of the power part 200 , and the medium voltage input part 100 and the low voltage output part 300 are isolated from each other by a first isolation member 400 .

[0058] This solution integrates the medium-voltage input unit 100 and the low-voltage output unit 300 on the same side of the power unit 200, making better use of space compared to solutions in related technologies. In related technology solutions, in order to keep the three sub-cabinets consistent in both the third direction Z and the second direction Y, it is necessary to provide additional vacant areas A1 and A2 within the sub-cabinet where the medium-voltage input unit 100 is located, and an additional vacant area B within the sub-cabinet where the low-voltage output unit 300 is located. In this solution, however, it is only necessary to keep the three sub-cabinets consistent in the third direction Z. In the second direction Y, the combined size of the medium-voltage input unit 100 and the low-voltage output unit 300 is consistent with that of the power unit 200. This eliminates the vacant areas A1, A2, and B in related technologies, eliminating large areas of vacant space and thus facilitating improved power density of the solid-state transformer. This embodiment significantly reduces the overall size of the cabinet 10 in the first direction X by placing the medium-voltage input part 100 and the low-voltage output part 300 along the second direction Y, while reducing the overall volume of the cabinet 10. This embodiment is particularly suitable for placing a cabinet 10 in a space with a relatively narrow size in the first direction X, and the size can be flexibly adapted.

[0059] Please refer to Figure 3-Figure 6 For example, the medium voltage input part 100 and the low voltage output part 300 of this embodiment are located on one side of the power part 200 along the first direction X, and the first isolation member 400 is arranged perpendicular to the second direction Y to isolate the medium voltage input part 100 and the low voltage output part 300 from each other.

[0060] Please refer to Figure 9 and Figure 10 For another example, the medium voltage input part 100 and the low voltage output part 300 are located on one side of the power part 200 along the third direction Z, and the first isolation member 400 is disposed perpendicular to the second direction Y to isolate the medium voltage input part 100 and the low voltage output part 300 from each other. For example, the medium voltage input part 100 and the low voltage output part 300 can be located above the power part 200. Figure 3-Figure 6 As shown in the solution, the power unit 200 is arranged below the medium voltage input unit 100 and the low voltage output unit 300, which is more convenient for installation.

[0061] Please refer to Figure 11 In another possible implementation, the power unit 200 and the low-voltage output unit 300 are both located on the same side of the medium-voltage input unit 100 , and the medium-voltage input unit 100 and the low-voltage output unit 300 are isolated from each other by a first isolation member 400 .

[0062] This solution integrates the power unit 200 and the low-voltage output unit 300 on the same side of the medium-voltage input unit 100. Compared to the solutions in the related art, this solution fully utilizes space and eliminates the vacant areas A1, A2, and B in the related art, eliminating large areas of empty space. This is conducive to improving the power density of the solid-state transformer. In this solution, the side where the medium-voltage input unit 100 is located can be the left, right, front, back, top, or bottom side of the power cabinet. Correspondingly, the power unit 200 and the low-voltage output unit 300 are located on the other side of the power cabinet. For example, in this embodiment, by placing the power unit 200 and the low-voltage output unit 300 along the second direction Y, the overall size of the cabinet 10 in the first direction X can be significantly reduced while reducing the overall volume of the cabinet 10. This is particularly suitable for cabinets 10 with relatively narrow dimensions in the first direction X, and the dimensions can be flexibly adapted. The effects of other placement directions can be similarly deduced.

[0063] Please refer to Figure 12 In another possible implementation, the power unit 200 and the medium voltage input unit 100 are both located on the same side of the low voltage output unit 300 , and the medium voltage input unit 100 and the low voltage output unit 300 are isolated from each other by a first isolation member 400 .

[0064] This solution integrates the power unit 200 and the medium-voltage input unit 100 on the same side of the low-voltage output unit 300. Compared with the solutions of the related art, it fully utilizes the space and eliminates the vacant A1, A2 and B areas in the related art, eliminating large areas of vacant space. This is conducive to improving the power density of the solid-state transformer. In this solution, the side where the low-voltage output unit 300 is located can be the left side, right side, front side, back side, top side or bottom side of the power cabinet. Correspondingly, the power unit 200 and the medium-voltage input unit 100 are located on the other side of the power cabinet. This embodiment significantly reduces the overall size of the cabinet 10 in the first direction X by placing the medium-voltage input unit 100 and the power unit 200 along the second direction Y, while reducing the overall volume of the cabinet 10. It is particularly suitable for cabinets 10 with relatively narrow dimensions in the first direction X, and the dimensions can be flexibly adapted. The effects of other placement directions can be similarly deduced.

[0065] Please continue to refer to Figure 3In one possible embodiment, a plurality of power modules are provided in the power unit 200 of this embodiment. Along the second direction Y, the power module has a medium-voltage side and a low-voltage side. The medium-voltage side is arranged on the rear side, and the low-voltage side is arranged on the front side. The medium-voltage input unit 100 is close to (meaning that the distance between the medium-voltage input unit 100 and the medium-voltage side of the power module in the first direction X is less than the distance between the low-voltage output unit 300 and the medium-voltage side of the power module) the medium-voltage side of the power module is arranged, and the low-voltage output unit 300 is close to (meaning that the distance between the medium-voltage input unit 100 and the low-voltage side of the power module in the first direction X is greater than the distance between the low-voltage output unit 300 and the low-voltage side of the power module) the low-voltage side of the power module is arranged, that is, along the second direction Y, the medium-voltage input unit is arranged on the rear side, and the low-voltage output unit is arranged on the front side. The medium-voltage input unit 100 and the medium-voltage side of the power module are isolated from each other by the second isolation member 500.

[0066] For example, the first isolator 400 of this embodiment is a metal member. The second isolator 500 is an insulating member. Setting the second isolator 500 as an insulating member can reduce safety distances, thereby facilitating a reduction in volume and increasing the power density of the solid-state transformer. The second isolator 500 can also be a non-insulating member, without limitation.

[0067] Optionally, the first isolation member 400 of this embodiment includes a carbon steel plate or an aluminum-zinc-clad plate.

[0068] Please continue to refer to Figure 5 The medium-voltage input unit 100 of this embodiment includes an input copper busbar 110, a circuit breaker 120, and a reactor 130. The input copper busbar 110 connects to the medium-voltage side of the power module through the circuit breaker 120 and the reactor 130. It is understood that in other possible embodiments, the medium-voltage input unit 100 may also include other components.

[0069] Please continue to refer to Figure 4 In this embodiment, the low-voltage output unit 300 includes an output copper busbar 310 and a control module 320. The output copper busbar 310 is connected to the low-voltage side of the power module, and the control module 320 is communicatively connected to the circuit breaker 120, the reactor 130, and the power module. It is understood that in other possible embodiments, the low-voltage output unit 300 may also include other components.

[0070] Please continue to refer to Figure 6 The cabinet body 10 of this embodiment includes a top plate 11 and a bottom plate 12 arranged relative to each other along the third direction Z. The low-voltage output part 300 is provided with an air inlet 330, and the air inlet 330 is arranged close to the bottom plate 12. The first isolation member 400 is provided with an anti-direct view structure 410 for ventilation and preventing direct view, and an air outlet is provided on the top plate 11.

[0071] In this embodiment, the air inlet 330 is arranged close to the bottom plate 12, and the air outlet is arranged on the top plate 11. In this way, the direction of the air duct in the solid-state transformer is consistent with the heat dissipation direction of the electronic components, both from bottom to top, which is conducive to improving the heat dissipation efficiency of the solid-state transformer.

[0072] Illustratively, the air inlet 330 of this embodiment is arranged on one side of the low-pressure output part 300 along the second direction Y, and the ventilation structure is arranged at one end of the first isolation part 400 close to the bottom plate 12, that is, it is arranged at the lower part of the first isolation part 400, and the air outlet includes a first air outlet 111 and a second air outlet 112. The first air outlet 111 is connected to the low-pressure output part 300, and the second air outlet 112 is connected to the medium-pressure input part 100.

[0073] Furthermore, a duct divider 340 is provided within the low-pressure output section 300, perpendicular to the third direction Z. This divider 340 is used to divide the air entering through the air inlet 330, allowing some of the air from the air inlet 330 to enter the low-pressure output section 300, while another portion of the air from the air inlet 330 enters the medium-pressure input section 100 after passing through the ventilation structure. The duct divider 340 is not limited to being perpendicular to the third direction Z; it can also be arranged at a certain angle to the third direction Z.

[0074] Through the above structure, this embodiment utilizes the duct divider 340, the first isolator 400, and a portion of the cabinet 10 structure for accommodating the medium-voltage input portion 100 to form the duct for the medium-voltage input portion 100; and utilizes the duct divider 340, the first isolator 400, and another portion of the cabinet 10 structure for accommodating the low-voltage output portion 300 to form the duct for the low-voltage output portion 300. This embodiment can form independent ducts for the medium-voltage input portion 100 and the low-voltage output portion 300 using only one first isolator 400 in conjunction with the cabinet structure. In the related art, two insulating plates extending through the cabinet top and bottom plates are required to isolate the ducts of the three sub-cabinets. In this embodiment, only one insulating plate extending through the cabinet top and bottom plates and one duct divider 340 are required. Compared to the insulating plate extending through the cabinet top and bottom plates, the duct divider 340 is significantly smaller in size and easier to install. Compared to the related art, this can reduce costs and assembly workload. The independent air ducts of the medium voltage input part 100 and the low voltage output part 300 can dissipate heat from the reactor 130 and the output copper bus 310 , respectively, which generate large amounts of heat, thereby preventing local overheating.

[0075] To further improve the heat dissipation efficiency of the medium-voltage input section 100 and the low-voltage output section 300, this embodiment further includes a first fan 600 and a second fan 700 on the top plate 11. The first fan 600 is connected to the first air outlet 111, and the second fan 700 is connected to the second air outlet 112. It can be understood that the first fan 600 and the second fan 700 can accelerate the flow of air within the medium-voltage input section 100 and the low-voltage output section 300, thereby improving heat dissipation efficiency. Since the first fan 600 is connected to the first air outlet 111, the first air outlet 111 can serve as the outlet for the first fan 600; and since the second fan 700 is connected to the second air outlet 112, the second air outlet 112 can serve as the outlet for the second fan 700. Furthermore, by placing the first fan 600 and the second fan 700 on the top plate 11, this embodiment fully utilizes the vertical space and helps reduce the footprint of the solid-state transformer.

[0076] Please continue to refer to Figure 4 、 Figure 6 、 Figure 7 and Figure 8 In this embodiment, an anti-direct-view structure 410 is provided in the ventilation structure. The anti-direct-view structure 410 is used to prevent the human eye from directly observing the medium-voltage input part 100 along the air inlet 330, thereby preventing electrical arcing and electric spark sputtering from harming the human body and ensuring safety.

[0077] Specifically, the anti-direct-view structure 410 of this embodiment includes a plate body 411, a plurality of first shielding plates 412 and a plurality of second shielding plates 413. The plate body 411 is provided with a plurality of channels spaced apart along the third direction Z. The plurality of first shielding plates 412 and the plurality of second shielding plates 413 are arranged one-to-one on both sides of the plate body 411 along the second direction Y. The first shielding plates 412 and the second shielding plates 413 are both inclined relative to the plate body 411. The first shielding plates 412 and the second shielding plates 413 are used to shield the corresponding channels in the second direction Y. Through the above structure, this embodiment can ensure the ventilation of the medium-pressure input part 100 and the low-pressure output part 300 while ensuring the isolation of the medium-pressure input part 100 and the low-pressure output part 300. The anti-direct-view structure is not limited to Figure 7 、 Figure 8 The structure shown may also adopt other structures that can achieve ventilation and anti-direct viewing effects.

[0078] Please continue to refer to Figure 4-Figure 6 In this embodiment, a wiring box 13 is further provided on the top plate 11. The wiring box 13 is connected to the medium voltage input unit 100. It is understood that the wiring box 13 can provide a point connection between the medium voltage input unit 100 and external components. Placing the wiring box 13 between the first fan 600 and the second fan 700 can fully utilize space, thereby facilitating a reduction in the size of the solid-state transformer.

[0079] In the description of the present application, it should be understood that the orientation or positional relationship indicated by the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like is based on the orientation or positional relationship shown in the drawings, and is only for the purpose of facilitating the description of the present application and simplifying the description, and does not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation of the present application.

[0080] In the present application, unless otherwise explicitly specified and limited, the terms "mounting", "connection", "connecting", "fixing" and the like should be understood in a broad sense, for example, can be fixed connection, can also be detachable connection, or integral; can be directly connected, or indirectly connected through an intermediate medium; can be internal communication of two elements or interaction relationship between two elements. For those skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0081] It should be noted that in the description of the present application, the terms "first", "second" are only used for the convenience of describing different parts, and cannot be understood as indicating or implying the order relationship, relative importance or implicitly indicating the number of the technical features indicated. Therefore, the features limited by "first", "second" can include at least one of the features.

[0082] The embodiments or implementations in the present application are described in a progressive manner, and each embodiment focuses on the difference from other embodiments. The same or similar parts between the embodiments can be referred to each other.

[0083] In the description of the present application, the description of the terms "one embodiment", "some embodiments", "illustrative embodiment", "example", "specific example", or "some examples" means that the specific features, structures, materials or characteristics described in conjunction with the embodiments or examples are included in at least one embodiment or example of the present application. In the present application, the illustrative description of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner.

[0084] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present application, rather than to limit them. Although the present application has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or make equivalent replacements for some or all of the technical features therein. These modifications or replacements do not deviate the essence of the corresponding technical solutions from the scope of the technical solutions of the embodiments of the present application.

Claims

1. A solid-state transformer, characterized in that: The invention comprises a cabinet body, wherein a medium voltage input part, a power part and a low voltage output part are arranged in the cabinet body, and any one of the medium voltage input part, the power part and the low voltage output part is arranged adjacent to the other two.

2. The solid-state transformer according to claim 1, wherein: The medium voltage input part and the low voltage output part are both located on the same side of the power part, and the medium voltage input part and the low voltage output part are isolated from each other by a first isolation member.

3. The solid-state transformer according to claim 1, wherein: The power part and the low-voltage output part are both located on the same side of the medium-voltage input part, and the medium-voltage input part and the low-voltage output part are isolated from each other by a first isolation member.

4. The solid-state transformer according to claim 1, wherein: The power part and the medium voltage input part are both located on the same side of the low voltage output part, and the medium voltage input part and the low voltage output part are isolated from each other by a first isolation member.

5. The solid-state transformer according to claim 2, wherein: The medium voltage input part and the low voltage output part are located on one side of the power part along the first direction, the first isolation member is arranged perpendicular to the second direction to isolate the medium voltage input part and the low voltage output part from each other, and the first direction and the second direction are perpendicular to each other.

6. The solid-state transformer according to claim 2, wherein: The medium voltage input part and the low voltage output part are located on one side of the power part along the third direction, the first isolation member is arranged perpendicular to the second direction to isolate the medium voltage input part and the low voltage output part from each other, and the second direction and the third direction are perpendicular to each other.

7. The solid-state transformer according to claim 5 or 6, characterized in that: A plurality of power modules are provided in the power unit. Along the second direction, the power module has a medium-voltage side and a low-voltage side. The medium-voltage input unit is arranged close to the medium-voltage side of the power module, and the low-voltage output unit is arranged close to the low-voltage side of the power module. The medium-voltage input unit and the medium-voltage side of the power module are isolated from each other by a second isolation member.

8. The solid-state transformer according to claim 7, wherein: The first isolating member is a metal member; the second isolating member is an insulating member.

9. The solid-state transformer according to claim 8, characterized in that The first isolation member includes a carbon steel plate or an aluminum-zinc clad plate.

10. The solid-state transformer according to claim 1, wherein: The medium voltage input part includes an input copper busbar, a circuit breaker and a reactor. The input copper busbar is connected to the medium voltage side of the power module after passing through the circuit breaker and the reactor in sequence.

11. The solid-state transformer according to claim 10, wherein: The low-voltage output part includes an output copper busbar and a control module. The output copper busbar is connected to the low-voltage side of the power module. The control module is communicatively connected to the circuit breaker, the reactor and the power module.

12. The solid-state transformer according to claim 5, wherein: The cabinet body includes a top plate and a bottom plate arranged relative to each other along a third direction. The low-pressure output part is provided with an air inlet, and the air inlet is arranged close to the bottom plate. A ventilation structure is provided on the first isolation member, and an air outlet is provided on the top plate. The first direction and the second direction are perpendicular to the third direction.

13. The solid-state transformer according to claim 12, wherein: The air inlet is arranged on one side of the low-pressure output part along the second direction, the ventilation structure is arranged at one end of the first isolation part close to the bottom plate, and the air outlet includes a first air outlet and a second air outlet, the first air outlet is connected to the low-pressure output part, and the second air outlet is connected to the medium-pressure input part.

14. The solid-state transformer according to claim 13, wherein: The low-pressure output part is also provided with an air duct dividing plate perpendicular to the third direction. The air duct dividing plate allows part of the air from the air inlet to enter the low-pressure output part, and the other part of the air from the air inlet to enter the medium-pressure input part after passing through the ventilation structure.

15. The solid-state transformer according to claim 14, wherein: The top plate is further provided with a first fan and a second fan, wherein the first fan is connected to the first air outlet, and the second fan is connected to the second air outlet.

16. The solid-state transformer according to claim 12, wherein: An anti-direct-view structure is provided in the ventilation structure to prevent human eyes from directly observing the medium-pressure input part along the air inlet.

17. The solid-state transformer according to claim 16, wherein: The anti-direct view structure includes a plate body, multiple first shielding plates and multiple second shielding plates. The plate body is provided with multiple channels arranged at intervals along the third direction. The multiple first shielding plates and multiple second shielding plates are arranged one by one on both sides of the plate body along the second direction. The first shielding plates and the second shielding plates are both arranged obliquely to the plate body. The first shielding plates and the second shielding plates are used to shield the corresponding channels in the second direction.

18. The solid-state transformer according to claim 1, wherein: The cabinet body further includes a top plate, on which a wiring box is provided, and the wiring box is connected to the medium voltage input part.

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