Prefabricated transformer substation

Abstract

The invention discloses a prefabricated substation which comprises a container provided with a placing cavity and a bottom cavity, the bottom cavity is located below the placing cavity, a supporting plate is arranged between the bottom cavity and the placing cavity, a wire passing opening is formed in the supporting plate, and the bottom cavity and the placing cavity are communicated through the wire passing opening; the power transformation device is arranged above the supporting plate, and the power transformation device is provided with a wiring port; the bridge comprises a guide wire duct and interface wire ducts, the guide wire duct is transversely arranged in the bottom cavity and connected with the supporting plate, the interface wire ducts are arranged in the placement cavity and are in one-to-one correspondence with the wire passing ports, and inner cavities of the guide wire duct and the interface wire ducts are communicated through the wire passing ports; the bus bar assembly comprises a bus bar and at least one interface bus bar, the bus bar extends along the guide wire duct, one end of the interface bus bar is conductively connected with the bus bar, the interface bus bar penetrates through the wire passing port and extends along the interface wire duct, and the other end of the interface bus bar is conductively connected with the wiring port. The method is suitable for sea transportation and can adapt to more energy storage converters.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of transformer substations, and in particular to a preassembled transformer substation. BACKGROUND

[0002] There is no energy storage container-type transformer substation and busbar trunking product on the market that is specifically designed for overseas export. In the related art, the wire trunking is installed separately from the container module, and the busbar trunking is easy to install, but it occupies the space of the original power conversion system (PCS), which limits the number of PCS interfaces that can be fitted within the limited size, greatly limiting the capacity of the PCS. SUMMARY

[0003] The present application aims to at least solve one of the technical problems in the prior art. To this end, the present application proposes a preassembled transformer substation.

[0004] The solution to the technical problem of the present application is as follows: A preassembled transformer substation suitable for sea transportation, comprising: a container having a placement cavity and a bottom cavity, the bottom cavity being located below the placement cavity, a support plate being provided between the bottom cavity and the placement cavity, at least one wire passage being provided on the support plate, the bottom cavity and the placement cavity being in communication through the wire passage; a transformer device provided above the support plate, the transformer device being provided with a wiring port; a bridge comprising a guide wire trunking and at least one interface wire trunking, the guide wire trunking being provided transversely in the bottom cavity and connected to the support plate, the interface wire trunking being provided in the placement cavity and arranged one-to-one with the wire passage, the inner cavities of the guide wire trunking and the interface wire trunking being in communication through the wire passage; a busbar assembly comprising a busbar and at least one interface busbar, the busbar being arranged along the guide wire trunking, one end of the interface busbar being electrically connected to the busbar, the interface busbar passing through the wire passage and extending along the interface wire trunking, the other end of the interface busbar being electrically connected to the corresponding wiring port of the transformer device.

[0005] The present application has at least the following advantages: the guide wire trunking of the bridge and the busbar of the busbar assembly are designed to be integrated in the bottom cavity, which can improve the space utilization efficiency of the product structure within the limited size, leaving more space for the transformer device. Moreover, the busbar is hidden in the lower part of the support plate, the transformer device is installed on the support plate, and the wire trunking is hidden in the lower part of the transformer device, which can reduce the solar radiation on the bridge, thereby reducing the temperature rise of the guide wire trunking, and is conducive to the improvement of the capacity of the transformer device.

[0006] As a further improvement of the above technical solution, the power transformation device comprises a transformer and a plurality of energy storage converters, the plurality of energy storage converters are arranged side by side, the wiring port of each energy storage converter is located at the bottom of the energy storage converter, the interface bus bar row comprises a first line row connected with the transformer and a plurality of second line rows connected with the energy storage converters, the interface wire slot comprises a first wire slot for guiding the first line row and a plurality of second wire slots for guiding the second line rows, the wiring port of the transformer is located on the side close to the energy storage converters, and the first wire slot is arranged between the transformer and the energy storage converters.

[0007] As a further improvement of the above technical solution, the first line row comprises a plurality of groups of copper bars and a plurality of groups of insulators, the bottom of one group of the insulators abuts against the bottom surface of the first wire slot, and the top of the group of insulators abuts against one group of the copper bars to support the copper bar, and one group of the insulators is used to separate two adjacent groups of the copper bars.

[0008] As a further improvement of the above technical solution, the pre-installed power transformation station further comprises a ventilation device, the ventilation device comprises a fan and an outer cover, the fan is installed on the outer side of the first wire slot, the outer cover covers the outer periphery of the fan and is detachably connected with the first wire slot, the inner cavity of the outer cover is in communication with the inner cavity of the first wire slot, and the side wall of the guide wire slot is provided with a ventilation hole.

[0009] As a further improvement of the above technical solution, the bus bar row comprises a plurality of transverse units, the transverse units are arranged along the extension direction of the guide wire slot, two adjacent transverse units are detachably connected and conduct electricity with each other.

[0010] As a further improvement of the above technical solution, at least one side wall of the second wire slot is arranged to be inclined, so that the cross-sectional area of the lower end of the second wire slot is greater than the cross-sectional area of the upper end of the second wire slot, the size of the wire passing port corresponds to the size of the opening of the lower end of the second wire slot, and the wiring port of the energy storage converter corresponds to the size of the opening of the upper end of the second wire slot.

[0011] As a further improvement of the above technical solution, the bus bar row assembly further comprises a mutual inductor, the mutual inductor is arranged in the first wire slot and connected with the first line row, the wall surface of the first wire slot is provided with a maintenance port, the maintenance port is in communication with the inner cavity of the first wire slot, and the interface wire slot further comprises a top cover, the top cover covers the maintenance port and is detachably connected with the first wire slot.

[0012] As a further improvement of the above technical solution, the busbar assembly further comprises a cushion block, an insulating plate and a support bolt, the mutual inductor is provided with a mounting port, the first wire row is arranged through the mounting port, the cushion block is provided in two groups, the mutual inductor is clamped between the two groups of cushion blocks, the mutual inductor is provided with a connecting block, the insulating plate is arranged between the connecting block and the first wire row, and the support bolt is arranged through the connecting block, the first wire row, the cushion block and the insulating plate.

[0013] As a further improvement of the above technical solution, the busbar assembly further comprises a conductive soft connecting piece, and the interface busbar and the wiring port are connected through the conductive soft connecting piece.

[0014] As a further improvement of the above technical solution, the bridge further comprises a waterproof eave and a waterproof rubber strip, the waterproof eave is arranged at the connection between the first wire slot and the transformer, and the waterproof rubber strip is arranged at the connection between the second wire slot and the energy storage converter.

[0015] Additional aspects and advantages of the application will be set forth in part in the description which follows, and in part will become apparent to those skilled in the art upon examination of the following description and drawings. BRIEF DESCRIPTION OF DRAWINGS

[0016] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings needed in the embodiment description will be briefly described below. Obviously, the described drawings are only part of the embodiments of the present application, not all embodiments, and those skilled in the art can obtain other design schemes and drawings according to these drawings without creative labor.

[0017] Figure 1 is the overall structure schematic diagram of the prefabricated substation of the embodiment of the present application; Figure 2 is the arrangement schematic diagram of the bridge and the busbar assembly of the embodiment of the present application; Figure 3 is the internal structure schematic diagram of the first wire slot of the embodiment of the present application; Figure 4 is the installation path schematic diagram of the busbar row of the embodiment of the present application; Figure 5 is Figure 1 is the enlarged structure schematic diagram of part A in the figure; Figure 6 is the installation schematic diagram of the mutual inductor of the embodiment of the present application.

[0018] Reference signs: 100, container; 110, support plate; 200. Cable tray; 210. Guide trough; 220. First trough; 221. Pressure plate; 222. Waterproof groove; 223. Waterproof pad; 230. Second trough; 240. Waterproof sealing strip; 250. Ventilation hole; 260. Outer cover; 270. Waterproof eaves; 300. Busbar assembly; 310. Busbar busbar; 311. Lateral unit; 320. First busbar; 321. Copper busbar; 322. Insulator; 323. Instrument transformer; 324. Support bolt; 325. Spacer; 326. Insulating plate; 330. Second busbar; 400. Energy storage converter; 500. Transformer. Detailed Implementation

[0019] Embodiments of the present invention are described in detail below. Examples of these embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present invention, and should not be construed as limiting the present invention.

[0020] In the description of this invention, the orientation descriptions, such as up, down, front, back, left, right, etc., are based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limiting this invention.

[0021] In the description of this invention, "several" means one or more, "more than" means two or more, "greater than," "less than," and "exceeding" are understood to exclude the stated number, while "above," "below," and "within" are understood to include the stated number. The use of "first" and "second" in the description is merely for distinguishing technical features and should not be construed as indicating or implying relative importance, or implicitly indicating the number of indicated technical features, or implicitly indicating the order of the indicated technical features.

[0022] In the description of this invention, unless otherwise explicitly defined, terms such as "set up," "install," and "connect" should be interpreted broadly, and those skilled in the art can reasonably determine the specific meaning of the above terms in this invention in conjunction with the specific content of the technical solution.

[0023] Obviously, the described embodiments are only some, not all, of the embodiments of the present invention. Other embodiments obtained by those skilled in the art based on the embodiments of the present invention without creative effort are all within the scope of protection of the present invention. The various technical features of the present invention can be combined interactively without contradicting each other.

[0024] ReferenceFigures 1 to 6 This invention proposes a prefabricated substation, which is exported by sea. The prefabricated substation includes a container 100, a transformer, a cable tray 200, and a busbar assembly 300. It can solve the problem of limited PCS capacity and thus can accommodate more PCS within a certain size limit.

[0025] The container 100 has a placement cavity and a bottom cavity, with the bottom cavity located below the placement cavity. A support plate 110 is provided between the bottom cavity and the placement cavity, and the support plate 110 has at least one cable passage. The bottom cavity and the placement cavity are connected through the cable passage. A transformer is located above the support plate 110 and has a wiring port. The cable tray 200 includes a guide cable trough 210 and at least one interface cable trough. The guide cable trough 210 is arranged laterally in the bottom cavity and connected to the support plate 110. The interface cable trough is located in the placement cavity and is arranged correspondingly to the cable passage. The guide cable trough 210 and the interface cable trough are located on the lower and upper sides of the support plate 110, respectively, and are connected through the cable passage on the support plate 110.

[0026] The busbar assembly 300 includes a busbar 310 and an interface busbar. At least one interface busbar is provided. The busbar 310 extends along the guide groove 210. One end of the interface busbar is electrically connected to the busbar 310. The interface busbar passes through the cable outlet on the support plate 110 and extends along the inner cavity of the interface groove. The other end of the interface busbar is electrically connected to the corresponding wiring port of the substation.

[0027] Understandably, prefabricated substations face significant limitations in overall size, requiring a compact design. Conventional cable trays 200, placed on support plates 110, occupy considerable space, hindering the development of higher-capacity products. Furthermore, exposed cable trays are susceptible to sun exposure during sea transport, potentially leading to overheating. In this embodiment, the guide cable trays 210 of the cable tray 200 and the busbar assembly 300's busbar 310 are integrated into the bottom cavity, improving space utilization efficiency within the limited dimensions and providing more space for the substation equipment. Moreover, the busbar 310 is concealed beneath the support plate 110, with the substation equipment mounted on the support plate 110. The cable trays are hidden beneath the substation equipment, reducing sun exposure to the cable tray 200 and thus minimizing temperature rise in the guide cable trays 210, which is beneficial for increasing the substation's capacity. Taking the 40HC prefabricated containerized substation for marine energy storage as an example, container 100 is a standard-sized 40HC container 100 with a fixed shape, meaning the maximum size cannot exceed this size, and the capacity is about 5MW, allowing the substation equipment to be placed more compactly.

[0028] In some embodiments, the power distribution unit includes a transformer 500 and a plurality of energy storage converters 400 arranged side by side. The connection ports of each energy storage converter 400 are located at the bottom of the energy storage converter 400, and the connection ports of the transformer 500 are located on the side closest to the energy storage converters 400. The interface busbar includes a first busbar 320 and a second busbar 330. The first busbar 320 is connected to the connection port of the transformer 500, and multiple second busbars 330 are provided, each connected to a connection port of one energy storage converter 400. Correspondingly, the interface cable tray includes a first cable tray 220 and a second cable tray 230. The first cable tray 220 guides the first busbar 320, and the second cable tray 230 guides the second busbar 330. An installation space exists between the transformer 500 and the converter assembly formed by the plurality of energy storage converters 400, and the first cable tray 220 is located in this installation space.

[0029] Specifically, refer to Figure 1 and Figure 2 The transformer 500 is located on the left side of the converter assembly, and the first cable tray 220 is located on the left side of the converter assembly and the right side of the transformer 500. Since the busbar 310 and the conductor cable tray are located below the support plate 110, within the size-constrained placement cavity, there is ample space on the right side of the transformer 500 for installing more energy storage converters 400. The energy storage converters 400 are arranged side-by-side on the right side of the transformer 500, resulting in a very compact structure. For example, in this embodiment, four energy storage converters 400 are provided, and correspondingly, four second cable trays 230 are also provided.

[0030] For fixing the busbar assembly 300, conventional busbar clamps are used to fasten it inside the guide groove 210. However, for the interface busbars protruding from the bottom support surface, such as the first busbar 320, since it has horizontal and vertical extensions, with the horizontal extensions arranged in multiple stacked rows in the vertical direction, there are no readily available busbar clamps in the relevant technology for fixing. If a busbar clamp fixing solution is used, it needs to be custom-made by the manufacturer using insulating parts, but the customization cost is high.

[0031] In some embodiments, the horizontal extension of the first busbar 320 is secured using a stacked pattern of insulators 322, as shown in the reference. Figure 3The first busbar 320 includes multiple sets of copper busbars 321 and multiple sets of insulators 322. The bottom of one set of insulators 322 abuts against the bottom surface of the first cable tray 220, and the top of this set of insulators 322 abuts against one set of copper busbars 321, thus supporting the copper busbars 321. Adjacent sets of copper busbars 321 are separated by a set of insulators 322. The horizontal extension of the copper busbars 321 is fixed using a tower-like stacking of insulators 322. This design allows the weight of the copper busbars 321 to fall vertically onto the bottom surface of the first cable tray 220, i.e., the support plate 110. The support plate 110 has a higher bearing capacity than the sidewall strength of the first cable tray 220. Furthermore, the insulators 322 are commercially available mature products, and their cost is much lower than that of customized busbar clamps.

[0032] In some embodiments, the prefabricated substation further includes a ventilation device capable of forced ventilation of the inner cavity of the cable tray 200. The ventilation device includes a fan and an outer cover 260. The fan is installed on the outside of the first cable tray 220, and the outer cover 260 covers the outer periphery of the fan and is detachably connected to the first cable tray 220. The inner cavity of the outer cover 260 communicates with the inner cavity of the first cable tray 220, and ventilation holes 250 are provided on the side wall of the cable tray.

[0033] To control temperature rise loss, in addition to placing the guide trough 210 under the support plate 110 to reduce solar radiation, a forced ventilation device is used to improve the ventilation performance of the cable tray 200 cavity, further reducing temperature rise loss. This is especially true in embodiments where insulators 322 are stacked to fix the copper busbar 321; the temperature rise loss caused by the stacking of insulators 322 can also be solved by the ventilation device. In this embodiment, since the fan is installed outside the first cable trough 220 and covered by a separate outer cover 260, removing the outer cover 260 allows for fan maintenance, facilitating subsequent maintenance and management.

[0034] Furthermore, since the fan is installed outside the first cable trough 220, the waterproofing of the fan needs to be considered. Relying solely on the outer cover 260, there is still a risk of water seepage through its gaps. Therefore, in some embodiments, a boss is provided on the side wall of the fan installation location in the first cable trough 220. The fan is installed on the boss, and the outer cover 260 covers the boss. In this way, even if rainwater seeps in at the connection and fixing point between the outer cover 260 and the first cable trough 220, the rainwater will flow horizontally along the boss and flow out towards the edge of the boss, thus preventing rainwater from entering from the fan inlet located at the boss.

[0035] In some embodiments, the busbar 310 includes multiple transverse segments 311, which are arranged along the extension direction of the guide groove 210. Adjacent transverse segments 311 are detachably connected and electrically conductive to each other. It is understood that making the busbar 310 segmented reduces the number of connection openings in the energy storage converter 400, thereby ensuring the overall strength and waterproofing of the energy storage converter 400.

[0036] Understandably, the segmented design of the busbar 310 is primarily due to installation considerations during production. If the busbar 310 is not segmented during production, there are two installation methods: one is to completely open the top surface of the guide trough 210 to allow the busbar 310 to move vertically; however, this method results in a large opening, negatively impacting the strength of the support plate 110. The other method involves creating an additional opening at the rear of the conductor trough and pushing the busbar 310 from back to front into it. However, this method is unsuitable for containerized substations like the 100 type, and the additional opening also negatively impacts the strength of the conductor trough. In some embodiments, by segmenting the busbar 310, the opening connecting the interface trough to the connection port of the energy storage converter 400 can be used to place the busbar 310 into the guide trough 210, eliminating the need for an additional opening.

[0037] In this method, because the busbar 310 is segmented, there will be additional resistance between the horizontal individual units 311. Therefore, the heat generation of the busbar assembly 300 in the cable tray 200 will increase slightly. However, due to the ventilation device, the air in the cable tray 200 can flow from top to bottom, which can effectively solve the problem of increased heat generation and reduce temperature rise loss.

[0038] Furthermore, in some embodiments, reference is made to Figure 4 At least one side wall of the second cable tray 230 is inclined so that the cross-sectional area of ​​the lower end of the second cable tray 230 is larger than the cross-sectional area of ​​the upper end of the second cable tray 230. The size of the cable passage corresponds to the size of the lower opening of the second cable tray 230, and the size of the wiring port of the energy storage converter 400 corresponds to the size of the upper opening of the second cable tray 230.

[0039] This design, with its unique second groove 230, makes it easier to place the transverse unit 311 into the guide groove 210. The transverse unit 311 is inserted at an angle along the inclined groove wall. Figure 4The middle arrow indicates the installation path of the horizontal unit 311 and the busbar clamp used to connect the horizontal unit 311, enabling direct placement into the conductor trough from above the support plate 110. Simultaneously, for the installation of the busbar clamp connecting the horizontal unit 311, the longitudinal section of the second trough 230 is trapezoidal, facilitating the connection of the busbar clamp to the bottom surface of the cavity with bolts and nuts, making the production and installation process more convenient. Furthermore, it reduces the size of the wiring ports of the energy storage converter 400, improving the strength and waterproofing of the energy storage converter 400.

[0040] In some embodiments, refer to Figure 3 and Figure 6 The busbar assembly 300 also includes a current transformer 323, which is disposed in the first cable tray 220 and connected to the first cable tray 320. The wall of the first cable tray 320 is provided with a maintenance port, which communicates with the inner cavity of the first cable tray 220. The interface cable tray also includes a top cover, which covers the maintenance port and is detachably connected to the first cable tray 220.

[0041] It is understandable that the current transformer 323 is installed in the first cable tray 220, and maintenance can be performed by lifting the top cover. Electrical components such as fans are also installed in this location, and maintenance can be performed at the same time by lifting the top cover.

[0042] In some embodiments, refer to Figure 6 The busbar assembly 300 also includes pads 325, insulating plates 326, and support bolts 324. The current transformer 323 is provided with an installation port, and the first busbar 320 passes through the installation port. Two sets of pads 325 are provided, and the current transformer 323 is snapped between the two sets of pads 325. The current transformer 323 is provided with a connecting block, and the insulating plate 326 is provided between the connecting block and the first busbar 320. The support bolts 324 pass through the connecting block, the first busbar 320, the pads 325, and the insulating plate 326 to achieve locking between the current transformer 323 and the first busbar 320.

[0043] Understandably, referring to Figure 3 and Figure 6 Each group of copper busbars 321 in the first busbar 320 includes multiple copper busbars 321, and each group of spacers 325 includes multiple spacers 325. Two adjacent copper busbars 321 in the same group of copper busbars 321 are separated by a spacer 325. The two groups of spacers 325 are respectively set on both sides of the mounting port of the current transformer 323 and locked by the support bolts 324, thereby achieving the clamping of the current transformer 323.

[0044] The installation of current transformers 323 in the market generally involves using bolts provided by the manufacturer to press down the copper busbar 321 for fixation. This method is suitable for land transportation. However, for sea transportation, the bumps and jolting during sea transport are several times greater than those on land, and the existing installation method for current transformers 323 cannot meet the requirements of sea transportation, as it is prone to loosening. In this embodiment, the installation of the current transformer 323 is modified to be achieved by using left and right pads 325 to hold the current transformer 323 in place. The pads 325 are firmly secured to the copper busbar 321. At the same time, an insulating plate 326 is placed between the copper busbar 321 and the connecting block of the current transformer 323 to enhance insulation and prevent creepage. With the installation method described above, the installation stability is greatly improved, which can meet the requirements of sea transportation.

[0045] In some embodiments, the busbar assembly 300 further includes a conductive flexible connector, through which the interface busbar and the wiring port are connected. Considering connection strength, the prefabricated substation uses rigid connections to fix the transformer 500 and the energy storage converter 400 to the support plate 110, while the interface busbar and the wiring port are flexibly connected via conductive flexible connectors. This allows for displacement in different directions between different modules during sea transport without damaging the structure.

[0046] In some embodiments, the conductive flexible connector is made of copper foil.

[0047] Since prefabricated substations for sea transport are generally heavy, even if the upper surface of the support plate 110 is designed to be a flat plane, water often tends to accumulate on the upper surface of the support plate 110. Moreover, during sea transport, due to weather, waves and other reasons, water may accumulate on the support plate 110. Combined with the turbulence of sea transport, the water sloshes on the support plate 110, making it easier for water to seep into the cable tray 200.

[0048] In some embodiments, the cable tray 200 further includes a waterproof eaves 270 and a waterproof strip 240 to improve the waterproof performance of the cable tray 200.

[0049] Among them, reference Figure 2 and Figure 3 A waterproof eave 270 is provided at the connection between the first cable tray 220 and the transformer 500, and is located above the connection between the first cable tray 220 and the transformer 500, and can block rainwater. In some embodiments, a waterproof eave 270 is also provided above the connection between the outer cover 260 and the first cable tray 220 to further improve the waterproof performance of the outer cover 260.

[0050] A waterproof strip 240 is installed at the connection between the second cable tray 230 and the energy storage converter 400. The waterproof strip 240 improves the sealing of the connection between the second cable tray 230 and the energy storage converter 400, preventing water from seeping into the cable tray 200. At the same time, it also allows a flexible connection between the second cable tray 230 and the energy storage converter 400 to adapt to the turbulence of sea travel.

[0051] In some embodiments, the waterproof strip 240 is disposed around the periphery of the upper opening of the second groove 230, and its longitudinal section is E-shaped or T-shaped, having a downwardly extending insertion end and a sealing end. The sealing end covers the upper surface of the second groove 230 and is connected to the bottom surface of the energy storage converter 400. The upper end of the insertion end is connected to the sealing end, and the lower end of the insertion end is inserted downward into the second groove 230 to achieve an effective waterproof structure.

[0052] In some embodiments, refer to Figure 5 The cable tray 200 also includes a waterproof pad 223. The lower surface of the waterproof pad 223 is connected to the upper surface of the support plate 110. A waterproof groove 222 is provided on the bottom surface inside the first cable groove 220. A pressure plate 221 is provided on the outer side of the first cable groove 220. The bottom of the waterproof groove 222 and the lower surface of the pressure plate 221 respectively abut against the upper surface of the waterproof pad 223. The side wall of the waterproof groove 222 forms an upwardly extending waterproof wall to further improve the waterproof effect.

[0053] The prefabricated substation of this embodiment allows for the design of a larger capacity energy storage converter 400 within the space of the size-limited container 100. Furthermore, the low temperature rise level within the cable tray 200 reduces temperature loss and improves the ease of production and installation. This prefabricated substation of this embodiment allows for intensive transportation and is suitable for maritime transport.

[0054] The preferred embodiments of the present invention have been described in detail above, but the present invention is not limited to the embodiments described. Those skilled in the art can make various equivalent modifications or substitutions without departing from the spirit of the present invention, and these equivalent modifications or substitutions are all included within the scope defined by the claims of this application.

Claims

1. A prefabricated substation, characterized in that, Suitable for maritime transport, the prefabricated substation includes: The container has a placement cavity and a bottom cavity, the bottom cavity being located below the placement cavity, a support plate being provided between the bottom cavity and the placement cavity, the support plate having at least one cable passage, and the bottom cavity and the placement cavity communicating through the cable passage; A power transformer is located above the support plate, and the power transformer is provided with a wiring port; The cable tray includes a guide groove and at least one interface groove. The guide groove is horizontally disposed in the bottom cavity and connected to the support plate. The interface groove is disposed in the placement cavity and is arranged in a corresponding manner with the cable passage openings. The inner cavities of the guide groove and the interface groove are connected through the cable passage openings. A busbar assembly includes a busbar and at least one interface busbar. The busbar extends along the guide groove. One end of the interface busbar is electrically connected to the busbar. The interface busbar passes through the cable outlet and extends along the interface groove. The other end of the interface busbar is electrically connected to the corresponding wiring port of the substation.

2. The prefabricated substation according to claim 1, characterized in that, The power transformation device includes a transformer and multiple energy storage converters. The multiple energy storage converters are arranged side by side, and the connection port of each energy storage converter is located at the bottom of the energy storage converter. The interface busbar includes a first busbar connected to the transformer and multiple second busbars connected to the energy storage converters. The interface slot includes a first slot guiding the first busbar and multiple second slots guiding the second busbars. The connection port of the transformer is located on the side close to the energy storage converter, and the first slot is located between the transformer and the energy storage converter.

3. The prefabricated substation according to claim 2, characterized in that, The first busbar includes multiple sets of copper busbars and multiple sets of insulators, wherein the bottom of one set of insulators abuts against the bottom surface of the first cable tray and the top of one set of copper busbars abuts against the copper busbars to support the copper busbars, and a set of insulators separates two adjacent sets of copper busbars.

4. The prefabricated substation according to claim 2, characterized in that, The prefabricated substation also includes a ventilation device, which includes a fan and an outer cover. The fan is installed on the outside of the first cable trough, and the outer cover covers the outer periphery of the fan and is detachably connected to the first cable trough. The inner cavity of the outer cover communicates with the inner cavity of the first cable trough, and the side wall of the guide cable trough is provided with ventilation holes.

5. The prefabricated substation according to claim 2, characterized in that, The busbar includes multiple transverse units arranged along the extension direction of the guide groove. Adjacent transverse units are detachably connected and electrically conductive to each other.

6. The prefabricated substation according to claim 5, characterized in that, At least one side of the second cable tray wall is inclined so that the cross-sectional area of ​​the lower end of the second cable tray is larger than the cross-sectional area of ​​the upper end of the second cable tray. The size of the cable passage corresponds to the size of the lower end opening of the second cable tray, and the wiring port of the energy storage converter corresponds to the size of the upper end opening of the second cable tray.

7. The prefabricated substation according to claim 2, characterized in that, The busbar assembly also includes a current transformer, which is disposed in the first cable tray and connected to the first cable tray. The wall of the first cable tray is provided with a maintenance port, which communicates with the inner cavity of the first cable tray. The interface cable tray also includes a top cover, which covers the maintenance port and is detachably connected to the first cable tray.

8. The prefabricated substation according to claim 7, characterized in that, The busbar assembly also includes pads, insulating plates, and support bolts. The current transformer has an installation port, through which the first busbar passes. There are two sets of pads, and the current transformer is snapped between the two sets of pads. The current transformer has a connecting block, and the insulating plate is located between the connecting block and the first busbar. The support bolt passes through the connecting block, the first busbar, the pads, and the insulating plate.

9. The prefabricated substation according to claim 1, characterized in that, The busbar assembly also includes a conductive flexible connector, through which the interface busbar is connected to the wiring port.

10. The prefabricated substation according to claim 2, characterized in that, The cable tray also includes a waterproof eaves and a waterproof strip. The waterproof eaves are located at the connection between the first cable tray and the transformer, and the waterproof strip is located at the connection between the second cable tray and the energy storage converter.

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