Photovoltaic box transformer structure

Abstract

The utility model relates to box type substation technical field especially relates to a kind of photovoltaic box structure, disclose a kind of photovoltaic box structure, including box and energy storage module;Energy storage module includes PCS cabinet, interface flange structure and bridge;Interface flange structure includes flange main body, elastic sealing element and fireproof layer;The first excess gap between the other end of elastic sealing element along the height direction of itself and bottom plate is formed, and the second excess gap between the other end of elastic sealing element along the height direction of itself and sealing plate is formed, first excess gap and second excess gap are filled with fireproof layer respectively;Effectively improve the sealing of the connecting position of PCS cabinet and flange main body, prevent dust and moisture from entering flange main body, the present photovoltaic box structure can normally operate and prolong service life, solve the poor sealing of the connecting position of the PCS cabinet and connecting interface in the existing photovoltaic box, cannot set fire clay at the connecting position of PCS cabinet and connecting interface, the problem of low operation safety of photovoltaic box.

Description

Technical Field

[0001] This utility model relates to the field of prefabricated substation technology, and in particular to a photovoltaic prefabricated substation structure. Background Technology

[0002] A photovoltaic (PV) prefabricated substation, also known as a prefabricated substation for PV power generation, typically has an internal structure designed according to the customer's specific needs. Currently, many manufacturers incorporate energy storage modules within these substations to achieve integrated energy storage, voltage boosting, and power conversion. The energy storage module comprises a prefabricated circuit board (PCS) cabinet (energy storage converter cabinet) and cable trays, both crucial components. The PCS cabinet usually houses equipment such as converters that connect to copper busbars. The bottom plate has a bottom outlet for the copper busbars to pass through, extending from inside the cabinet to the outside to connect with other modules, such as transformer modules. The cable trays cover the outside of the copper busbars, supporting, fixing, and protecting them, and connect to the bottom of the PCS cabinet via sealing interfaces.

[0003] The base plate and sealing plate of the PCS cabinet's lower cable outlet are usually made of insulating board. Insulating board is relatively soft and has a large surface area. After the base plate is fixed to the bottom of the PCS cabinet and the sealing plate is fixed to the outer edge of the lower cable outlet, both are prone to deformation under stress. Specifically, this manifests as a noticeable concavity in the middle of the bottom panel of the PCS cabinet, with a slight concavity around the edges. When this deformation occurs, the sealing strip at the connection interface cannot fit tightly against the base plate and sealing plate. In this case, the sealing strip is not properly pressed, allowing dust and moisture to easily enter the connection interface and oxidize and corrode the copper busbars, thus affecting the normal operation of the photovoltaic transformer and shortening its service life. Furthermore, the connection interfaces are mostly vertical structures, making it difficult to support fireproof sealant, meaning fireproof sealant cannot be applied to the connection interfaces. If fireproof sealant is applied over a large area at the bottom of the PCS cabinet, the hardened sealant will damage the insulation board due to vibrations generated during PCS cabinet operation. Therefore, the bottom of the PCS cabinet is not suitable for large-area application of fireproof sealant. It is evident that the connection point between the PCS cabinet and the connection interface does not meet fire protection requirements, resulting in low operational safety for the photovoltaic substation. Thus, the poor sealing at the connection point between the PCS cabinet and the connection interface in existing photovoltaic substations affects the normal operation of the substation and shortens its service life. Moreover, the inability to apply fireproof sealant at the connection point leads to low operational safety for the photovoltaic substation. Utility Model Content

[0004] The main purpose of this utility model is to provide a photovoltaic transformer substation structure that effectively improves the sealing performance of the connection between the PCS cabinet and the flange body. This prevents dust and moisture from entering the flange body and causing oxidation and corrosion of the copper busbars, ensuring the normal operation and extended service life of the photovoltaic transformer substation structure. It also meets fire protection requirements and solves the problems of poor sealing performance at the connection between the PCS cabinet and the connection interface in existing photovoltaic transformer substations, which affects the normal operation of the photovoltaic transformer substation and shortens its service life. Furthermore, it addresses the issue of the inability to install fireproof sealant at the connection between the PCS cabinet and the connection interface, resulting in low operational safety of the photovoltaic transformer substation.

[0005] To achieve the above objectives, the photovoltaic transformer substation structure proposed in this utility model includes a box and an energy storage module, wherein the energy storage module is disposed on one side of the box; the energy storage module includes a PCS cabinet, an interface flange structure, and a cable tray.

[0006] The PCS cabinet includes a cabinet body and a sealing plate. The cabinet body is fixedly connected to the box body. A bottom plate is fixedly installed at the bottom end of the cabinet body. The bottom plate has a cable outlet. The sealing plate is connected to the bottom plate to seal the cable outlet. Both the bottom plate and the sealing plate are connected to the cable tray through the interface flange structure. The cable tray is detachably connected to the bottom end of the box body.

[0007] The interface flange structure includes a flange body, an elastic seal, and a fireproof layer. The flange body is located below the outlet and is detachably connected to the cable tray. One end of the elastic seal along its height direction is fixed to the top of the flange body. The other end of the elastic seal along its height direction forms a first clearance with the base plate, and the other end of the elastic seal along its height direction forms a second clearance with the sealing plate. The fireproof layer is filled in the first clearance and the second clearance respectively.

[0008] Optionally, a groove is provided at the top of the flange body, and one end of the elastic seal along its height direction is engaged in the groove.

[0009] Optionally, the sealing plate is detachably connected to the base plate, and the sealing plate is disposed on the side of the base plate opposite to the elastic seal, and the second allowance gap is greater than the first allowance gap.

[0010] Optionally, the range of the first allowance gap and the range of the second allowance gap are both 6mm-12mm.

[0011] Optionally, the flange body includes a first flange body and a second flange body, the central axis of the first flange body coincides with the central axis of the second flange body, the top end of the first flange body is provided with the groove, and the top ends of the first flange body and the second flange body are detachably connected, and the bottom end of the second flange body is detachably connected to the cable tray.

[0012] Optionally, the first flange body includes four transition plates spliced ​​end to end, each transition plate including a protrusion and a flange, both the protrusion and the flange being disposed at the top of the second flange body;

[0013] The top of the protrusion is provided with a snap-fit ​​groove, and four snap-fit ​​grooves are spliced ​​together to form the groove.

[0014] The flanged portion is fixedly connected to the side wall of the protrusion away from the central axis of the second flange body, and the flanged portion is detachably connected to the top end of the second flange body.

[0015] Optionally, the snap-fit ​​groove is a dovetail groove.

[0016] Optionally, the second flange body includes a square sleeve, a first annular plate, and a second annular plate. The first annular plate and the second annular plate are symmetrically arranged at the top and bottom ends of the square sleeve, and the central axis of the first annular plate, the central axis of the second annular plate, and the central axis of the square sleeve coincide.

[0017] Both the protrusion and the flange are located at the top of the first annular plate. The flange is detachably connected to the first annular plate, and the second annular plate is detachably connected to the cable tray.

[0018] Optionally, the fireproof layer is fireproof putty.

[0019] Optionally, the number of energy storage modules is two, and the two energy storage modules are arranged on both sides of the width direction of the box.

[0020] Compared with the prior art, the embodiments of this utility model have the following beneficial effects:

[0021] In this photovoltaic transformer substation structure, the interface flange structure connects the PCS cabinet and the cable tray. The interface flange structure includes a flange body, an elastic seal, and a fireproof layer. One end of the elastic seal along its height direction forms a first clearance with the base plate, and the other end forms a second clearance with the sealing plate. Both the first and second clearances are filled with the fireproof layer. In this photovoltaic transformer substation structure, the elastic seal and the fireproof layer form a flat-mouth structure. The fireproof layer allows for full compression of the elastic seal, which generates an upward elastic force when compressed. Therefore, with the combined action of the first and second clearances, the fireproof layer, and the elastic seal, the cabinet, flange body, and cable tray are tightly connected. This effectively prevents the elastic seal from failing to engage properly due to deformation of the base plate and sealing plate, effectively improving the sealing performance of the connection between the PCS cabinet and the flange body. It also prevents dust and moisture from entering the flange body, which could lead to oxidation and corrosion of the copper busbars, ensuring the normal operation of this photovoltaic transformer substation structure and extending its service life. In addition, by setting the first and second margin gaps, sufficient installation space is provided for the fireproof layer, which makes it easier to install the fireproof layer between the base plate and the elastic seal, as well as between the sealing plate and the elastic seal, thus meeting the fire protection requirements. Therefore, this photovoltaic transformer box structure has the advantage of high operational safety. Attached Figure Description

[0022] Figure 1 This is a schematic diagram of the structure of a photovoltaic transformer box according to an embodiment of the present invention;

[0023] Figure 2 This is a structural schematic diagram of the energy storage module (hidden sealing plate) of a photovoltaic transformer substation structure according to an embodiment of the present invention;

[0024] Figure 3 This is a partial cross-sectional view of the energy storage module of a photovoltaic transformer substation structure according to an embodiment of the present invention;

[0025] Figure 4 for Figure 3 Enlarged view of the hidden fireproof layer at point B;

[0026] Figure 5 for Figure 4 Diagram of adding fireproof layer Figure 1 ;

[0027] Figure 6 for Figure 4 Diagram of adding fireproof layer Figure 2 ;

[0028] Figure 7 for Figure 1 Enlarged view of point A in the middle;

[0029] Figure 8This is an exploded view of the flange body and elastic seal of a photovoltaic transformer substation structure according to an embodiment of the present invention.

[0030] Figure 9 This is a schematic diagram of the first flange body of a photovoltaic transformer substation structure according to an embodiment of the present invention;

[0031] Figure 10 This is a top view of the transition plate of a photovoltaic transformer substation structure according to an embodiment of the present invention;

[0032] Figure 11 This is a side view of the transition plate of a photovoltaic transformer substation structure according to an embodiment of the present invention;

[0033] Figure 12 This is a schematic diagram of the photovoltaic transformer structure according to another embodiment of the present invention.

[0034] In the attached diagram: 1. Cabinet; 2. Energy storage module; 21. PCS cabinet; 211. Cabinet body; 2111. Base plate; 2112. Outlet port; 212. Sealing plate; 22. Interface flange structure; 221. Flange body; 2211. Groove; 2212. First flange body; 22121. Transition plate; 22121a. Protrusion; 22121b. Flanged part; 22121c. Snap-fit ​​groove; 2213. Second flange body; 22131. Square sleeve; 22132. First annular plate; 22133. Second annular plate; 222. Elastic seal; 223. Fireproof layer; 224. First allowance gap; 225. Second allowance gap; 23. Cable tray; 3. Copper busbar. Detailed Implementation

[0035] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0036] It should be noted that all directional indicators (such as up, down, left, right, front, back, etc.) in this utility model embodiment are only used to explain the relative positional relationship and movement of each component in a certain specific posture (as shown in the figure). If the specific posture changes, the directional indicator will also change accordingly.

[0037] In this utility model, unless otherwise explicitly specified and limited, the terms "connection," "fixing," etc., should be interpreted broadly. For example, "fixing" can mean a fixed connection, a detachable connection, or an integral part; it can mean a mechanical connection or an electrical connection; it can mean a direct connection or an indirect connection through an intermediate medium; it can mean the internal communication of two components or the interaction between two components, unless otherwise explicitly limited. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0038] Furthermore, in this utility model, descriptions involving "first," "second," etc., are for descriptive purposes only and should not be construed as indicating or implying their relative importance or implicitly specifying the number of technical features indicated. Therefore, features defined with "first" or "second" may explicitly or implicitly include at least one of those features. Additionally, the word "and / or" throughout the text means including three parallel solutions; taking "A and / or B" as an example, it includes solution A, solution B, or a solution that simultaneously satisfies A and B. Furthermore, the technical solutions of the various embodiments can be combined with each other, but this must be based on the ability of those skilled in the art to implement them. When the combination of technical solutions is contradictory or impossible to implement, it should be considered that such a combination of technical solutions does not exist and is not within the scope of protection claimed by this utility model.

[0039] This utility model proposes a photovoltaic transformer structure.

[0040] In the embodiments of this utility model, such as Figures 1 to 7 As shown, the photovoltaic transformer structure includes a box 1 and an energy storage module 2, with the energy storage module 2 located on one side inside the box 1; the energy storage module 2 includes a PCS cabinet 21, an interface flange structure 22, and a cable tray 23;

[0041] PCS cabinet 21 includes cabinet body 211 and sealing plate 212. Cabinet body 211 is fixedly connected to box body 1. A bottom plate 2111 is fixedly installed at the bottom end of cabinet body 211. The bottom plate 2111 has a cable outlet 2112. The sealing plate 212 is connected to the bottom plate 2111 to seal the cable outlet 2112. Both the bottom plate 2111 and the sealing plate 212 are connected to the cable tray 23 through interface flange structure 22. The cable tray 23 is detachably connected to the bottom end of box body 1.

[0042] The interface flange structure 22 includes a flange body 221, an elastic seal 222, and a fireproof layer 223. The flange body 221 is located below the outlet 2112 and is detachably connected to the cable tray 23. One end of the elastic seal 222 along its height direction is fixed to the top of the flange body 221. The other end of the elastic seal 222 along its height direction forms a first allowance gap 224 with the base plate 2111, and the other end of the elastic seal 222 along its height direction forms a second allowance gap 225 with the sealing plate 212. The first allowance gap 224 and the second allowance gap 225 are respectively filled with the fireproof layer 223.

[0043] In this photovoltaic transformer substation structure, the interface flange structure 22 connects the PCS cabinet 21 and the cable tray 23. The interface flange structure 22 includes a flange body 221, an elastic seal 222, and a fireproof layer 223. One end of the elastic seal 222 along its height direction forms a first clearance 224 with the base plate 2111, and the other end forms a second clearance 225 with the sealing plate 212. The first clearance 224 and the second clearance 225 are respectively filled with the fireproof layer 223. In this photovoltaic transformer substation structure, the elastic seal 222 and the fireproof layer 223 form a flat-mouth structure, and the fireproof layer 223 can ensure the elastic seal... When component 222 is fully compressed, the elastic seal 222 generates an upward elastic force under pressure. Therefore, with the combined action of the first allowance gap 224, the second allowance gap 225, the fireproof layer 223, and the elastic seal 222, the cabinet 211, the flange body 221, and the cable tray 23 are tightly connected. This effectively avoids the situation where the elastic seal 222 is not properly pressed due to deformation of the base plate 2111 and the sealing plate 212. This effectively improves the sealing performance of the connection between the PCS cabinet 21 and the flange body 221, and prevents dust and moisture from entering the flange body 221, which would cause oxidation and corrosion of the copper busbar 3. This ensures that the photovoltaic transformer structure can operate normally and extend its service life. In addition, by setting the first margin gap 224 and the second margin gap 225, sufficient installation space is provided for the fireproof layer 223, which makes it easier to set the fireproof layer 223 between the base plate 2111 and the elastic seal 222, and between the sealing plate 212 and the elastic seal 222, thus meeting the fire protection requirements. Therefore, this photovoltaic transformer box structure has the advantage of high operational safety.

[0044] This invention solves the problems of poor sealing at the connection point between the PCS cabinet 21 and the connection interface in existing photovoltaic transformer substations, which affects the normal operation of the photovoltaic transformer substation and shortens its service life, and the inability to install fireproof sealant at the connection point between the PCS cabinet 21 and the connection interface, resulting in low operational safety of the photovoltaic transformer substation.

[0045] Preferably, one end of the cable tray 23 connecting interface flange structure 22 is detachably connected to the bottom of the housing 1.

[0046] To further explain, the outlet 2112 is used for the copper busbar 3 to pass through, and the cable tray 23 is used to cover the copper busbar 3 that passes through the base plate 2111, the sealing plate 212 and the interface flange structure 22 in sequence.

[0047] To further explain, in this photovoltaic transformer box structure, one end of the cable tray 23 is detachably connected to the bottom end of the box body 1 via the interface flange structure 22, and the end of the cable tray 23 away from the interface flange structure 22 extends to the side of the cabinet 211 near the vertical center line of the box body 1.

[0048] like Figure 8 As shown, further, a groove 2211 is provided at the top of the flange body 221, and one end of the elastic seal 222 along its own height direction is engaged in the groove 2211.

[0049] By creating a groove 2211 at the top of the flange body 221, one end of the elastic seal 222 along its height direction is engaged in the groove 2211. The groove 2211 can fix the elastic seal 222 at the top of the flange body 221, thereby preventing the elastic seal 222 from shifting during the operation of this photovoltaic transformer structure and ensuring a tight connection between the flange body 221, the base plate 2111, and the sealing plate 212.

[0050] In one embodiment of this utility model, the elastic sealing element 222 is a sealing strip. The elastic sealing element 222 has high sealing performance. When the elastic sealing element 222 is subjected to the pressure of the fireproof layer 223, it generates an upward elastic force, thereby making the flange body 221 tightly fit with the base plate 2111 or the sealing plate 212. This can effectively avoid the situation where the sealing strip is not pressed in place due to the deformation of the insulating plate, and effectively improve the sealing performance of the connection between the cabinet 211 and the flange body 221.

[0051] Preferably, the elastic seal 222 is a clip-on sealing strip.

[0052] like Figure 5 and 6 As shown, the sealing plate 212 is detachably connected to the base plate 2111, and the sealing plate 212 is disposed on the side of the base plate 2111 away from the elastic seal 222, and the second allowance gap 225 is greater than the first allowance gap 224.

[0053] The detachable connection between the sealing plate 212 and the base plate 2111 facilitates subsequent maintenance or replacement of the sealing plate 212, effectively improving the efficiency of subsequent maintenance or replacement. The sealing plate 212 is located on the side of the base plate 2111 away from the elastic seal 222. At this time, the second allowance gap 225 is larger than the first allowance gap 224. The fireproof layer 223 filled by the larger second allowance gap 225 will also be relatively thicker, ensuring the sealing of the connection between the cabinet 211 and the flange body 221, while also ensuring that fire protection requirements are met.

[0054] To further clarify, the range of the first allowance gap 224 and the range of the second allowance gap 225 are both 6mm-12mm.

[0055] In this photovoltaic transformer structure, the sizes of the first clearance 224 and the second clearance 225 are related to the height of the elastic seal 222. When the fireproof layer 223 compresses the elastic seal 222, the elastic seal 222 generates an upward elastic force, tightly connecting the flange body 221 with the base plate 2111 or the sealing plate 212, thereby sealing the connection between the cabinet 211 and the flange body 221. However, if the first clearance 224 and the second clearance 225 are too small, the thickness of the fireproof layer 223 will be small, and the pressure exerted by the fireproof layer 223 on the elastic seal 222 will also be small. In this case, the elastic seal 222 will push up the base plate 2111 or the sealing plate 212, resulting in improper installation of the elastic seal 222 and an inability to achieve a good sealing effect. If the first allowance gap 224 and the second allowance gap 225 are too large, more fireproof layer 223 material will be required, which will not only waste materials, but also cause the entire interface flange structure 22 to occupy too much space, reducing the structural compactness of this photovoltaic transformer structure.

[0056] like Figure 8 As shown, further, the flange body 221 includes a first flange body 2212 and a second flange body 2213. The central axis of the first flange body 2212 coincides with the central axis of the second flange body 2213. The top end of the first flange body 2212 is provided with a groove 2211, and the top ends of the first flange body 2212 and the second flange body 2213 are detachably connected. The bottom end of the second flange body 2213 is detachably connected to the cable tray 23.

[0057] The top ends of the first flange body 2212 and the second flange body 2213 are detachably connected, and the bottom end of the second flange body 2213 is detachably connected to the cable tray 23. This can improve the installation flexibility of the entire flange body 221. In the actual installation process, the installation sequence of the first flange body 2212 and the second flange body 2213 can be adjusted according to the actual site conditions, which can further improve the installation efficiency of this photovoltaic transformer structure.

[0058] Preferably, both the first flange body 2212 and the second flange body 2213 are made of aluminum alloy.

[0059] like Figures 9 to 11 As shown, the first flange body 2212 further includes four transition plates 22121 spliced ​​end to end. The transition plate 22121 includes a protrusion 22121a and a flange 22121b. Both the protrusion 22121a and the flange 22121b are located at the top of the second flange body 2213.

[0060] The top of the protrusion 22121a is provided with a snap-fit ​​groove 22121c, and four snap-fit ​​grooves 22121c are spliced ​​together to form a groove 2211;

[0061] The flange 22121b is fixedly connected to the side wall of the protrusion 22121a away from the central axis of the second flange body 2213, and the flange 22121b is detachably connected to the top of the second flange body 2213.

[0062] Compared with an integral flange, the first flange body 2212, which is spliced ​​end to end by four transition plates 22121, is easier to process. The transition plate 22121 includes a protrusion 22121a and a flange 22121b. Thus, the groove 2211 formed by splicing four snap-fit ​​grooves 22121c can be snapped and connected with the elastic seal 222. The flange 22121b is detachably connected to the top of the second flange body 2213. The first flange body 2212 has the characteristics of compact structure.

[0063] In one embodiment of the present invention, the horizontal cross-section of the protrusion 22121a and the horizontal cross-section of the flange 22121b are both trapezoidal.

[0064] like Figure 11 As shown, the snap-fit ​​groove 22121c is a dovetail groove.

[0065] The snap-fit ​​groove 22121c is set as a dovetail groove. At this time, the snap-fit ​​groove 22121c has a unique shape. After the elastic seal 222 is connected to the snap-fit ​​groove 22121c, the snap-fit ​​groove 22121c can effectively prevent the elastic seal 222 from coming loose from the snap-fit ​​groove 22121c when it encounters external force. The connection between the snap-fit ​​groove 22121c and the elastic seal 222 has high reliability and high stability.

[0066] like Figure 8As shown, the second flange body 2213 further includes a square sleeve 22131, a first annular plate 22132 and a second annular plate 22133. The first annular plate 22132 and the second annular plate 22133 are symmetrically arranged at the top and bottom ends of the square sleeve 22131, and the central axis of the first annular plate 22132, the central axis of the second annular plate 22133 and the central axis of the square sleeve 22131 coincide.

[0067] Both the protrusion 22121a and the flange 22121b are provided at the top of the first annular plate 22132. The flange 22121b is detachably connected to the first annular plate 22132, and the second annular plate 22133 is detachably connected to the cable tray 23.

[0068] The second flange body 2213 includes a square sleeve 22131, a first annular plate 22132 and a second annular plate 22133. The second flange body 2213 has a compact structure, and the protrusion 22121a, the flange 22121b and the cable tray 23 form a stable connection relationship with the second flange body 2213.

[0069] Preferably, the first annular plate 22132 and the flanged portion 22121b, and the second annular plate 22133 and the cable tray 23 are respectively detachably connected by bolts.

[0070] It should be noted that the first annular plate 22132 and the second annular plate 22133 can be of the same or different specifications and sizes.

[0071] Furthermore, fireproof layer 223 is fireproof putty.

[0072] The fireproof layer 223 is fireproof putty, which has good flame retardancy and fire resistance, further improving the operational safety and extending the service life of this photovoltaic transformer substation structure. Furthermore, production personnel can easily fill the fireproof layer 223 into the first and second clearance gaps 224 and 225, further improving the installation efficiency of this photovoltaic transformer substation structure.

[0073] To further clarify, the fireproof putty used in this embodiment of the invention is a commercially available product.

[0074] like Figure 12 As shown, further, the number of energy storage modules 2 is two, and the two energy storage modules 2 are set on both sides of the width direction of the box 1.

[0075] By incorporating two energy storage modules 2, the energy storage capacity of this photovoltaic transformer substation structure can be enhanced, further meeting diverse needs. Furthermore, if one energy storage module 2 fails, requires maintenance, or reaches the end of its lifespan, the other energy storage module 2 can be used to ensure uninterrupted energy storage and power supply to the photovoltaic transformer substation structure. In addition, the two energy storage modules 2 are positioned on both sides of the width of the enclosure 1, giving this photovoltaic transformer substation structure the advantage of a rational structural layout.

[0076] The technical principles of this utility model have been described above with reference to specific embodiments. These descriptions are merely for explaining the principles of this utility model and should not be construed as limiting the scope of protection of this utility model in any way. Based on this explanation, those skilled in the art can readily conceive of other specific embodiments of this utility model without any inventive effort, and these embodiments will all fall within the scope of protection of this utility model.

Claims

1. A photovoltaic transformer substation structure, characterized in that, It includes a housing and an energy storage module, with the energy storage module disposed on one side of the housing; the energy storage module includes a PCS cabinet, an interface flange structure, and a cable tray; The PCS cabinet includes a cabinet body and a sealing plate. The cabinet body is fixedly connected to the box body. A bottom plate is fixedly installed at the bottom end of the cabinet body. The bottom plate has a cable outlet. The sealing plate is connected to the bottom plate to seal the cable outlet. Both the bottom plate and the sealing plate are connected to the cable tray through the interface flange structure. The cable tray is detachably connected to the bottom end of the box body. The interface flange structure includes a flange body, an elastic seal, and a fireproof layer. The flange body is located below the outlet and is detachably connected to the cable tray. One end of the elastic seal along its height direction is fixed to the top of the flange body. The other end of the elastic seal along its height direction forms a first clearance with the base plate, and the other end of the elastic seal along its height direction forms a second clearance with the sealing plate. The fireproof layer is filled in the first clearance and the second clearance respectively.

2. The photovoltaic transformer substation structure according to claim 1, characterized in that, The flange body has a groove at its top end, and one end of the elastic seal along its height direction is engaged in the groove.

3. The photovoltaic transformer substation structure according to claim 2, characterized in that, The sealing plate is detachably connected to the base plate, and the sealing plate is disposed on the side of the base plate opposite to the elastic seal. The second allowance gap is greater than the first allowance gap.

4. The photovoltaic transformer substation structure according to claim 3, characterized in that, The range of the first allowance gap and the range of the second allowance gap are both 6mm-12mm.

5. The photovoltaic transformer substation structure according to claim 2, characterized in that, The flange body includes a first flange body and a second flange body. The central axis of the first flange body coincides with the central axis of the second flange body. The top end of the first flange body is provided with the groove, and the top ends of the first flange body and the second flange body are detachably connected. The bottom end of the second flange body is detachably connected to the cable tray.

6. The photovoltaic transformer substation structure according to claim 5, characterized in that, The first flange body includes four transition plates spliced ​​end to end. Each transition plate includes a protrusion and a flange. Both the protrusion and the flange are located at the top of the second flange body. The top of the protrusion is provided with a snap-fit ​​groove, and four snap-fit ​​grooves are spliced ​​together to form the groove. The flanged portion is fixedly connected to the side wall of the protrusion away from the central axis of the second flange body, and the flanged portion is detachably connected to the top end of the second flange body.

7. The photovoltaic transformer substation structure according to claim 6, characterized in that, The snap-fit ​​groove is a dovetail groove.

8. The photovoltaic transformer substation structure according to claim 6, characterized in that, The second flange body includes a square sleeve, a first annular plate, and a second annular plate. The first annular plate and the second annular plate are symmetrically arranged at the top and bottom ends of the square sleeve, and the central axis of the first annular plate, the central axis of the second annular plate, and the central axis of the square sleeve coincide. Both the protrusion and the flange are located at the top of the first annular plate. The flange is detachably connected to the first annular plate, and the second annular plate is detachably connected to the cable tray.

9. The photovoltaic transformer substation structure according to claim 1, characterized in that, The fireproof layer is fireproof putty.

10. The photovoltaic transformer substation structure according to claim 1, characterized in that, The energy storage module is provided in two parts, and the two energy storage modules are provided on both sides of the width direction of the box.

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