Box-type substation and power system

Abstract

The utility model provides a box-type substation and a power system, relates to the field of power systems, and aims to solve the problems of large wiring length and high cost. The box-type substation comprises a first power distribution cabinet, a second power distribution cabinet, a cable, a transformer and a box body oil storage cavity. One end of the cable is electrically connected with the first power distribution cabinet, and the other end is electrically connected with the second power distribution cabinet. The first power distribution cabinet and the second power distribution cabinet are electrically connected with the transformer. A containing space and an oil storage cavity are defined by the box body. The first power distribution cabinet, the second power distribution cabinet and the transformer are all arranged in the accommodating space. The cable, the first power distribution cabinet and the second power distribution cabinet are all located on the same side of the transformer in the first direction. In the second direction, the oil storage cavity is located at the bottom of the transformer and used for receiving oil of the transformer. The second direction is the height direction of the box body and is perpendicular to the first direction. The box-type substation is used for reducing the wiring length and wiring cost of the box-type substation.

Description

Technical Field

[0001] The present application relates to the field of power systems, and in particular to a box-type substation and a power system. Background Art

[0002] Box-type substation, also known as prefabricated substation or prefabricated substation. It is a factory-prefabricated indoor and outdoor compact distribution equipment that is arranged in a certain wiring scheme with high-voltage switchgear, distribution transformer and low-voltage distribution device. However, the high-voltage switchgear and low-voltage distribution device of the traditional box-type substation are located on both sides of the distribution transformer, so the wiring length between the two is long and the wiring cost is high. Utility Model Content

[0003] The purpose of the present application is to provide a box-type substation and a power system, which are used to reduce the wiring length and wiring cost of the box-type substation.

[0004] In a first aspect of the present application, a box-type substation is provided, comprising a first distribution cabinet, a second distribution cabinet, a cable, a transformer and a box. One end of the cable is electrically connected to the first distribution cabinet. The other end of the cable is electrically connected to the second distribution cabinet. Both the first distribution cabinet and the second distribution cabinet are electrically connected to the transformer. The first distribution cabinet is used to transmit a current having a first voltage to the transformer. The transformer is used to transmit a current having a second voltage to the second distribution cabinet. The first voltage and the second voltage are not equal. The box is provided with a receiving space and an oil storage chamber. The first distribution cabinet, the second distribution cabinet and the transformer are all arranged in the receiving space. Along the first direction, the cable, the first distribution cabinet and the second distribution cabinet are all located on the same side of the transformer. And along the second direction, the oil storage chamber is located at the bottom of the transformer, and the oil storage chamber is used to receive the oil of the transformer. The second direction is the height direction of the box, and the second direction is perpendicular to the first direction. Through the above arrangement, the first distribution cabinet can supply power to the second distribution cabinet or monitor the second distribution cabinet through the cable. And the cable, the first distribution cabinet and the second distribution cabinet are all located on the same side of the transformer. Compared with setting the first distribution cabinet and the second distribution cabinet on both sides of the transformer, in the box-type substation provided by the present application, the cable can be connected to the first distribution cabinet and the second distribution cabinet without bypassing the transformer, thereby reducing the length of the cable. The wiring length between the high-voltage switchgear and the low-voltage distribution device is reduced, thereby reducing the wiring length of the box-type substation and reducing the cost of the box-type substation. In addition, during operation and maintenance, the staff can operate and maintain the first distribution cabinet and the second distribution cabinet without bypassing the transformer, reducing the range of movement of the staff, and facilitating operation and maintenance. At the same time, the oil storage chamber of the box body can receive and store the oil leaked from the transformer. When the box-type substation is installed, there is no need to build an oil pool by civil engineering, which saves the cost of the civil engineering oil pool, thereby reducing the installation cost of the box-type substation. And the first distribution cabinet, the second distribution cabinet, the transformer and the oil storage chamber are all integrated in the box-type substation to improve the integration of the box-type substation.

[0005] In an optional embodiment, the first power distribution cabinet and the second power distribution cabinet are arranged side by side along the third direction. The third direction is perpendicular to both the first direction and the second direction. At this time, the first power distribution cabinet will not block the second power distribution cabinet and the transformer, which is convenient for laying lines to achieve electrical connection between the second power distribution cabinet and the transformer. Similarly, the second power distribution cabinet will not block the first power distribution cabinet and the transformer, which is convenient for laying lines to achieve electrical connection between the first power distribution cabinet and the transformer. In addition, along the second direction, the height dimensions of the first power distribution cabinet and the second power distribution cabinet overlap, thereby reducing the total height of the box.

[0006] In an optional embodiment, the box body includes a bottom frame, a plurality of vertical beams, a top plate and an oil storage cover. The transformer, the first power distribution cabinet and the second power distribution cabinet are all arranged on the bottom frame. One end of the vertical beam is connected to the bottom frame. The bottom frame and the vertical beam can support the box-type substation. The top plate cover is arranged at the other end of the vertical beam away from the bottom frame. The bottom frame, the plurality of vertical beams and the top plate form a storage space. The top plate can block rain and sunlight, thereby protecting the transformer, the first power distribution cabinet, the second power distribution cabinet and other equipment in the storage space. The oil storage cover is buckled on the bottom frame. The bottom frame and the oil storage cover form an oil storage cavity. The oil storage cavity can receive and store oil leaked from the transformer.

[0007] In an optional embodiment, the oil storage cover includes a side plate and a cover plate. The side plate is arranged on the side of the bottom frame facing the transformer and is connected to the bottom frame. The cover plate is arranged on the side plate and is connected to the side plate. The bottom frame, the side plate and the cover plate can enclose an oil storage cavity. The side plate is arranged on the bottom frame. After the bottom frame, the side plate and the cover plate enclose the oil storage cavity, the side plate can increase the size of the oil storage cavity in a direction perpendicular to the horizontal plane, increase the volume of the oil storage cavity, and thereby ensure that the oil storage cavity can accommodate more oil to meet the storage requirements of the box-type substation for leaked oil.

[0008] In an optional embodiment, the bottom frame includes a first side beam, a second side beam, a first cross beam, a second cross beam, a third cross beam and a bottom plate. The second side beam is arranged side by side with the first side beam in the third direction. The third direction is perpendicular to both the first direction and the second direction. The two ends of the first cross beam are respectively connected to one end of the first side beam and one end of the second side beam. The two ends of the second cross beam are respectively connected to the other end of the first side beam and the other end of the second side beam. The third cross beam is located between the first cross beam and the second cross beam, and the two ends of the third cross beam are respectively connected to the first side beam and the second side beam. The bottom plate is located in a space surrounded by the first side beam, the second side beam, the first cross beam and the third cross beam. The peripheral side of the bottom plate is respectively connected to the first side beam, the second side beam, the first cross beam and the third cross beam. The first side beam, the second side beam, the first cross beam, the third cross beam, the bottom plate, the side plate and the cover plate form an oil storage cavity. The first side beam, the second side beam, the first cross beam and the third cross beam provide support for the bottom plate and the side plate. Ensure the structural stability of the box body and reduce the occurrence of oil leakage in the oil storage cavity due to damage to the box body structure. The bottom plate is located in the space surrounded by the first side beam, the second side beam, the first crossbeam and the third crossbeam, that is, the bottom plate is located between the first crossbeam and the third crossbeam. The space between the second crossbeam and the third crossbeam will not be blocked by the bottom plate, which makes it convenient to install other equipment (such as the first distribution cabinet or the second distribution cabinet) in the space. In addition, after the first side beam, the second side beam, the first crossbeam, the third crossbeam, the bottom plate and the oil storage cover form an oil storage cavity, at least a part of the oil storage cavity will be located in the space in the bottom frame, so that the space enclosed by the bottom frame can be utilized, thereby improving the space utilization rate of the box-type substation, thereby reducing the required size of the box-type substation, reducing material costs, and further reducing the cost of the box-type substation.

[0009] In an optional embodiment, an oil inlet hole is provided on the cover plate and penetrates the cover plate. The oil inlet hole is connected to the oil storage cavity. When the transformer leaks oil, the oil drips onto the cover plate, and the cover plate is used to receive the oil, and the oil flows into the oil storage cavity through the oil inlet hole provided on the cover plate for storage.

[0010] In an optional embodiment, the oil storage cover further includes an oil retaining flange. The oil retaining flange is arranged on the side of the cover plate facing the transformer. The oil retaining flange is arranged around the edge of the cover plate. After the oil leaked from the transformer drips onto the cover plate, the oil retaining flange can prevent the oil from flowing away from the peripheral side of the cover plate and prevent the oil from leaking out of the box body. It is ensured that the oil can flow into the oil storage cavity through the oil inlet hole and be stored.

[0011] In an optional embodiment, the cover plate and the oil retaining flange are an integral structure. Alternatively, the side plate and the oil retaining flange are an integral structure. When processing and manufacturing the oil storage cover, the cover plate and the oil retaining flange are integrally formed into an integral structure. Alternatively, the side plate and the oil retaining flange are integrally formed into an integral structure, which can save the cost of connecting the oil retaining flange and the cover plate, and further reduce the cost of the box-type substation.

[0012] In an optional embodiment, a groove is formed on the surface of the cover plate facing the transformer, and the oil inlet hole is arranged at the bottom of the groove. After the oil leaked from the transformer flows to the cover plate, it is easy to gather at the groove and then flow into the oil storage cavity from the oil inlet hole. This facilitates the oil to enter the oil storage cavity from the oil inlet hole and be stored.

[0013] In an optional embodiment, the box-type substation also includes a floor drain. The floor drain is arranged at the opening of the oil inlet toward the transformer and is detachably connected to the cover plate. A plurality of through holes are provided on the floor drain. The through hole is connected to the oil inlet. The through hole is an oblong hole or a rectangular hole. And the width of the through hole is smaller than the diameter of the oil inlet. So that some debris with a larger width cannot pass through the through hole. The floor drain can prevent some larger debris from entering the oil storage cavity through the oil inlet. It also prevents some larger debris from getting stuck in the oil inlet, causing the oil inlet to be blocked. When the through hole is an oblong hole or a rectangular hole, under the condition of the same width, the opening area of ​​the through hole is larger, thereby ensuring the oil leakage effect. When the through hole of the floor drain is blocked, the floor drain can be removed from the cover plate, cleaned, and then reinstalled on the cover plate.

[0014] In an optional embodiment, at least one liquid outlet hole connected to the oil storage chamber is provided on the box body. When cleaning and maintenance are required, the liquid in the oil storage chamber can be discharged through the liquid outlet hole.

[0015] In an optional embodiment, the box-type substation further includes an oil-water separator. The oil-water separator is connected to the liquid outlet. The oil-water separator is used to separate the water in the oil storage chamber and discharge the water. When rainwater or other water enters the oil storage chamber, the oil-water separator can separate the water in the oil storage chamber and discharge the water out of the oil storage chamber. This prevents water from occupying too much volume, thereby reducing the amount of oil that can be stored in the oil storage chamber. At the same time, it also prevents the water in the oil storage chamber from freezing and expanding in volume in cold weather, thereby avoiding damage to the oil storage chamber.

[0016] In an optional embodiment, the first power distribution cabinet includes a first cabinet body and a first cabinet door. The first cabinet door is rotatably connected to the first cabinet body. The equipment in the first cabinet body is protected by the first cabinet body and the first cabinet door. The first cabinet door is located on the side of the first cabinet body away from the second power distribution cabinet; or, the first cabinet door is located on the side of the first cabinet body away from the transformer. At this time, the side of the first cabinet body away from the second power distribution cabinet, or the side of the first cabinet body away from the transformer will not be blocked by the second power distribution cabinet and the transformer, thereby facilitating the staff to open the first cabinet door and perform operation and maintenance operations on the equipment in the first cabinet.

[0017] In an optional embodiment, the second power distribution cabinet includes a second cabinet body and a second cabinet door. The second cabinet door is rotatably connected to the second cabinet body. The equipment in the second cabinet body is protected by the second cabinet body and the second cabinet door. The second cabinet door is located on the side of the second cabinet body away from the first power distribution cabinet; or, the second cabinet door is located on the side of the second cabinet body away from the transformer. At this time, the side of the second cabinet body away from the first power distribution cabinet, or the side of the second cabinet body away from the transformer will not be blocked by the first power distribution cabinet and the transformer, thereby facilitating the staff to open the second cabinet door and perform operation and maintenance operations on the equipment in the second cabinet.

[0018] In an optional embodiment, among the multiple vertical beams, the gap between two adjacent vertical beams exposes the first cabinet door or the second cabinet door. In the related art, in order to be able to operate and maintain the equipment in the box, a switch door will be set on the box, and the staff needs to open the switch door first before operating and maintaining the equipment in the box. In order to ensure that the equipment in the box can be exposed after opening the switch door, the switch door needs to be set larger, and the staff is more laborious to open and close. In this application, the gap between two adjacent vertical beams of the box exposes the first cabinet door or the second cabinet door. During operation and maintenance, the staff only needs to open the first cabinet door or the second cabinet door through the gap between two adjacent vertical beams. At this time, when the first cabinet door is opened, only the equipment in the first cabinet needs to be exposed, so the first cabinet door is relatively small, which is convenient for the staff to open and close. Similarly, at this time, when the second cabinet door is opened, only the equipment in the second cabinet needs to be exposed, so the second cabinet door is also relatively small, which is convenient for the staff to open and close. Then, while reducing the material cost required for setting the switch door, the work intensity of the staff when operating and maintaining the first distribution cabinet and the second distribution cabinet is reduced.

[0019] In a second aspect of the present application, a power system is provided, comprising the above-mentioned box-type substation and an inverter. The first distribution cabinet of the box-type substation is electrically connected to the inverter. The inverter is used to convert the received direct current into alternating current and output it to the first distribution cabinet. In addition, the above-mentioned power system has the same technical effect as the box-type substation provided in the above-mentioned embodiment, which will not be repeated here. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 A schematic diagram of the structure of a power system provided in an embodiment of the present application;

[0021] Figure 2 A schematic diagram of the structure of a box-type substation provided in an embodiment of the present application;

[0022] Figure 3 for Figure 2 The top view of the box-type substation is shown;

[0023] Figure 4 for Figure 2The partial cross-sectional view of the box-type substation along the direction O1-O2 shown;

[0024] Figure 5 A top view of another box-type substation provided in an embodiment of the present application;

[0025] Figure 6 for Figure 2 The schematic diagram of the structure of the box-type substation after the first distribution cabinet, the second distribution cabinet and the transformer are removed;

[0026] Figure 7 A structural schematic diagram of another box-type substation provided in an embodiment of the present application;

[0027] Figure 8 A schematic diagram of the structure of another box-type substation provided in an embodiment of the present application after the first distribution cabinet, the second distribution cabinet and the transformer are removed;

[0028] Fig. 9 for Figure 8 The partial cross-sectional view of the box-type substation along the direction P1-P2 shown;

[0029] Fig.10 A schematic diagram of the structure of another box-type substation provided in an embodiment of the present application after the first distribution cabinet, the second distribution cabinet and the transformer are removed;

[0030] Fig.11 for Fig.10 The enlarged view of the box-type substation at location A is shown;

[0031] Fig.12 for Fig.11 The local cross-sectional view of the box-type substation along the N1-N2 direction is shown;

[0032] Fig.13 A structural schematic diagram of another box-type substation provided in an embodiment of the present application;

[0033] Fig.14 A structural schematic diagram of another box-type substation provided in an embodiment of the present application;

[0034] Fig.15 A structural schematic diagram of another box-type substation provided in an embodiment of the present application;

[0035] Fig.16 A schematic structural diagram of another box-type substation provided in an embodiment of the present application.

[0036] Reference numerals:

[0037] 100-power system; 01-power distribution equipment; 02-power generation equipment; 03-inverter; 10-box-type substation; 20-boosting station; 11-first distribution cabinet; 111-first cabinet body; 112-first cabinet door; 12-second distribution cabinet; 121-second cabinet body; 122-second cabinet door; 13-transformer; 14-cable; 15-box; 151-accommodation space; 152-oil storage chamber; 153-bottom frame; 1531-first side beam; 1532-second side beam ; 1533-first crossbeam; 1534-second crossbeam; 1535-third crossbeam; 1536-bottom plate; 1537-liquid outlet; 154-vertical beam; 155-top plate; 156-oil storage cover; 1561-side plate; 1562-cover plate; 15621-oil inlet hole; 15622-groove; 1563-oil retaining flange; 1564-oil retaining groove; 16-floor drain; 161-through hole; 17-second screw; 18-strip reinforcement rib; 19-oil-water separator. DETAILED DESCRIPTION

[0038] The technical solutions in the embodiments of the present application will be described below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all of the embodiments.

[0039] In the following, the terms "first", "second", "third", etc. are used only for convenience of description and are not to be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Thus, a feature defined as "first", "second", "third", etc. may explicitly or implicitly include one or more of the feature. In the description of this application, unless otherwise specified, "plurality" means two or more.

[0040] In this application, unless otherwise clearly specified and limited, the term "connection" should be understood in a broad sense. For example, "connection" can be a fixed mechanical connection, a detachable mechanical connection, or an integrated one; or, "connection" can be a direct connection or an indirect connection through an intermediate medium.

[0041] In the embodiments of the present application, words such as "exemplarily" and "for example" are used to indicate examples, illustrations or explanations. Any embodiment or design described as "exemplarily" or "for example" in the embodiments of the present application should not be interpreted as being more preferred or more advantageous than other embodiments or designs. Specifically, the use of words such as "exemplarily" and "for example" is intended to present related concepts in a specific way.

[0042] In the drawings of the embodiments of the present application, components are represented by straight line guide lines with arrows; parts are represented by straight line guide lines only; hollow structures such as cavities and openings are represented by curved line guide lines.

[0043] like Figure 1 As shown, an embodiment of the present application provides a power system 100. The power system 100 may include a power distribution device 01, a power generation device 02, and an inverter 03. The power generation device 02 is electrically connected to the power distribution device 01 through the inverter 03. The power generation device 02 is used to generate electricity and output direct current to the inverter 03. The inverter 03 converts the direct current into alternating current and performs voltage conversion through the power distribution device 01 and outputs it to the power grid.

[0044] For example, the power system 100 may be a photovoltaic system, a wind power generation system, a hydropower generation system, a geothermal power generation system, etc.

[0045] The following description will be made by taking the above-mentioned power system 100 as a photovoltaic system as an example. Figure 1 As shown, the power generation equipment 02 of the photovoltaic system is a photovoltaic module, which may include a solar panel. The photovoltaic module converts solar energy into electrical energy and outputs direct current to the inverter 03.

[0046] like Figure 1 As shown, the power distribution equipment 01 may include a box-type substation 10. The inverter 03 receives the power generation equipment 02 (such as Figure 1 The DC power outputted by the inverter 03 is converted into AC power and then outputted to the box-type substation 10. The box-type substation 10 boosts the AC power generated by the inverter 03 and outputs it to the power grid.

[0047] Continue as Figure 1 As shown, the power distribution equipment 01 may also include a booster station 20. The AC power output by the box-type substation 10 is further boosted by the booster station 20 and then output to the power grid to meet the voltage level required for power transmission and distribution.

[0048] The above Figure 1 In the illustrated embodiment, the power system 100 includes one box-type substation 10 and one inverter 03. In other embodiments of the present application, the number of box-type substations 10 and inverters 03 may also be multiple. One box-type substation 10 may also receive AC power output by multiple inverters 03.

[0049] For ease of description, the length direction of the box-type substation 10 is X-axis, the width direction is Y-axis, and the height direction is Z-axis. Hereinafter, the X-axis direction is the first direction, the Z-axis direction is the second direction, and the Y-axis direction is the third direction.

[0050] like Figure 2 As shown, the above-mentioned box-type substation 10 may include a first distribution cabinet 11, a second distribution cabinet 12 and a transformer 13. The first distribution cabinet 11 and the second distribution cabinet 12 are both electrically connected to the transformer 13. The first distribution cabinet 11 can receive an inverter 03 (such as Figure 1The transformer 13 receives the current from the first power distribution cabinet 11, performs voltage conversion (such as boosting) on ​​the current, and transmits the current with a second voltage to the second power distribution cabinet 12. The second power distribution cabinet 12 can distribute and output the received current with the second voltage to the power grid.

[0051] Exemplarily, the transformer 13 may be electrically connected to the first distribution cabinet 11 via a copper busbar (not shown in the figure). The transformer 13 may be electrically connected to the second distribution cabinet 12 via a high-voltage cable (not shown in the figure).

[0052] As another example, the first power distribution cabinet 11 may be a low-voltage power distribution device for controlling whether the inverter 03 is connected to the transformer 13. The first power distribution cabinet 11 is not specifically limited in the present embodiment. The second power distribution cabinet 12 may be a high-voltage switchgear for controlling whether the transformer 13 is connected to the power grid. Figure 1 In the power distribution equipment shown, the first power distribution cabinet 11 may be a low voltage cabinet, and the second power distribution cabinet 12 may be a medium voltage cabinet. In other embodiments of the present application, the first power distribution cabinet 11 may also be a medium voltage cabinet, and the second power distribution cabinet 12 may also be a low voltage cabinet. Alternatively, the second power distribution cabinet 12 may be a high voltage cabinet. The embodiments of the present application are not specifically limited.

[0053] like Figure 3 ( Figure 2 As shown in the top view of the box-type substation 10 shown in the figure, the box-type substation 10 may also include a cable 14. Both ends of the cable 14 are electrically connected to the first distribution cabinet 11 and the second distribution cabinet 12 respectively. The first distribution cabinet 11 can supply power to the second distribution cabinet 12 or monitor the second distribution cabinet 12 through the cable 14.

[0054] Exemplarily, the cable 14 may be a power line, the first power distribution cabinet 11 may include an auxiliary transformer (not shown in the figure), and the first power distribution cabinet 11 may include a lighting lamp, a smoke detector, and a relay protection device (not shown in the figure). The auxiliary transformer supplies power to the lighting lamp, the smoke detector, and the relay protection device through the power line.

[0055] Alternatively, the cable 14 may be a communication cable. The first power distribution cabinet 11 may include a monitoring device (not shown in the figure), and the second power distribution cabinet 12 may include a relay protection device (not shown in the figure). The monitoring device monitors the relay protection device in real time through the communication cable. When the second power distribution cabinet 12 fails, the relay protection device is powered off and transmits a signal to the monitoring device through the communication cable. The staff determines the state of the relay protection device through the monitoring device, which facilitates the staff to perform real-time maintenance.

[0056] Continue as Figure 2As shown, the box-type substation 10 may further include a box body 15. The box body 15 encloses a receiving space 151. The first distribution cabinet 11, the second distribution cabinet 12 and the transformer 13 are all arranged in the receiving space 151. Figure 3 As shown, along the first direction X, the cable 14, the first distribution cabinet 11 and the second distribution cabinet 12 are located on the same side of the transformer 13. Figure 3 In the box-type substation 10 shown, the cable 14 can be connected to the first distribution cabinet 11 and the second distribution cabinet 12 without bypassing the transformer 13. This can reduce the length of the cable 14, reduce the wiring length and wiring cost of the box-type substation 10. In addition, the staff can operate and maintain the first distribution cabinet 11 and the second distribution cabinet 12 without bypassing the transformer 13, reducing the range of movement of the staff and facilitating operation and maintenance.

[0057] Among them, the above-mentioned transformer 13 can be an oil-immersed transformer 13. The insulating oil of the oil-immersed transformer 13 has a high heat capacity, which can effectively conduct and dissipate heat, so that the transformer 13 can still work stably under high load conditions. However, during the operation of the transformer 13, oil leakage may occur. In order to collect and contain the oil leaked from the transformer 13, in some solutions, it is necessary to build an oil pool at the bottom of the transformer 13 through civil engineering. The civil engineering oil pool is relatively cumbersome, resulting in a long installation and construction period of the box-type substation 10, a high civil engineering cost, and an increase in the installation cost of the box-type substation 10.

[0058] In order to solve the above problems, the box body 15 is also surrounded by Figure 4 ( Figure 2 The oil storage chamber 152 is shown in the partial cross-sectional view of the box-type substation 10 along the direction O1-O2. Figure 2 As shown, the oil storage chamber 152 (as Figure 4 The oil storage chamber 152 is connected to the accommodating space 151. And along the second direction Z, the oil storage chamber 152 is located at the bottom of the transformer 13. The oil storage chamber 152 can receive and store the oil leaked from the transformer 13. When the box-type substation 10 is installed, there is no need to build an oil pool by civil engineering, which saves the cost of civil engineering oil pool, and thus can reduce the installation cost of the box-type substation 10. And the first distribution cabinet 11, the second distribution cabinet 12, the transformer 13 and the oil storage chamber 152 are all integrated in the box-type substation 10 to improve the integration of the box-type substation 10.

[0059] Continue as Figure 3As shown, along the third direction Y, the first distribution cabinet 11 and the second distribution cabinet 12 are arranged in parallel. The third direction Y is perpendicular to the first direction X and the second direction Z. At this time, the first distribution cabinet 11 will not block the second distribution cabinet 12 and the transformer 13, which is convenient for laying lines to achieve electrical connection between the second distribution cabinet 12 and the transformer 13. Similarly, the second distribution cabinet 12 will not block the first distribution cabinet 11 and the transformer 13, which is convenient for laying lines to achieve electrical connection between the first distribution cabinet 11 and the transformer 13. And the height dimensions of the first distribution cabinet 11 and the second distribution cabinet 12 overlap, so that the total height of the box 15 can be reduced.

[0060] It is understandable that the positions of the first distribution cabinet 11 and the second distribution cabinet 12 can be as follows: Figure 3 As shown, along the third direction Y, the second distribution cabinet 12 and the first distribution cabinet 11 are arranged in sequence. Alternatively, the first distribution cabinet 11 and the second distribution cabinet 12 can also be arranged as shown in FIG. Figure 5 As shown, along the third direction Y, the first distribution cabinet 11 and the second distribution cabinet 12 are arranged in sequence.

[0061] The above Figure 4 or Figure 5 In the illustrated embodiment, the first power distribution cabinet 11 and the second power distribution cabinet 12 are arranged in parallel along the third direction Y. In other embodiments of the present application, the first power distribution cabinet 11 and the second power distribution cabinet 12 may also be arranged in parallel along any direction on the XY plane. The first power distribution cabinet 11 and the second power distribution cabinet 12 may also be arranged in parallel along the second direction Z. The embodiments of the present application are not specifically limited.

[0062] Continue as Figure 2 As shown, the box body 15 may include a bottom frame 153, a plurality of vertical beams 154 and a top plate 155. One end of the vertical beam 154 is connected to the bottom frame 153. The bottom frame 153 and the vertical beam 154 can support the box-type substation 10. The top plate 155 is covered at the other end of the vertical beam 154 away from the bottom frame 153. The bottom frame 153, the plurality of vertical beams 154 and the top plate 155 enclose a receiving space 151. The top plate 155 can block rain and sunlight, thereby protecting the transformer 13, the first distribution cabinet 11, the second distribution cabinet 12 and other equipment installed in the receiving space 151. The first distribution cabinet 11 and the second distribution cabinet 12 can be connected to at least one of the bottom frame 153 and the vertical beam 154, and then the bottom frame 153 or the vertical beam 154 provide support for the first distribution cabinet 11 and the second distribution cabinet 12, ensuring that the first distribution cabinet 11 and the second distribution cabinet 12 are stably arranged in the accommodating space 151.

[0063] Exemplarily, the first power distribution cabinet 11 and the second power distribution cabinet 12 may be welded to the bottom frame 153 or the vertical beam 154. Alternatively, the first power distribution cabinet 11 and the second power distribution cabinet 12 may be connected to the bottom frame 153 or the vertical beam 154 by bolts. This embodiment of the application is not specifically limited.

[0064] like Figure 6 (like Figure 2 As shown in the schematic diagram of the bottom view of the box body 15 in the box-type substation 10, the box body 15 may also include an oil storage cover 156. The oil storage cover 156 is buckled on the bottom frame 153. Figure 4 As shown, the bottom frame 153 and the oil storage cover 156 enclose an oil storage chamber 152. The oil storage chamber 152 can receive and store the oil leaked from the transformer 13.

[0065] Alternatively, in some other embodiments of the present application, the box body 15 may also include an oil storage tank (not shown) and a bottom frame 153. The oil storage chamber 152 is provided in the oil storage tank. The oil storage tank may be an independent structure, and the oil storage tank is arranged on the bottom frame 153, and the oil storage tank is connected to the bottom frame 153. The oil storage tank may be produced separately and then installed on the bottom frame 153. The processing and production of the oil storage tank will not be limited by the obstruction of components such as the bottom frame 153, thereby improving production efficiency.

[0066] Continue as Figure 6 As shown, the transformer 13 (such as Figure 2 The oil storage cover 156 can be connected to the side of the oil storage cover 156 away from the bottom frame 153. The oil storage cover 156 provides support for the transformer 13. Alternatively, the transformer 13 (as shown in FIG. Figure 2 The top plate 155 can also be connected to the top plate 155. The top plate 155 provides support for the transformer 13. This ensures that the transformer 13 is stably arranged in the accommodating space 151.

[0067] In some embodiments of the present application, continue as Figure 6 As shown, the bottom frame 153 may include a first side beam 1531, a second side beam 1532, a first cross beam 1533, a second cross beam 1534 and a third cross beam 1535. The second side beam 1532 and the first side beam 1531 are arranged side by side in the third direction Y. The two ends of the first cross beam 1533 are respectively connected to one end of the first side beam 1531 and one end of the second side beam 1532. The two ends of the second cross beam 1534 are respectively connected to the other end of the first side beam 1531 and the other end of the second side beam 1532. The third cross beam 1535 is located between the first cross beam 1533 and the second cross beam 1534, and the two ends of the third cross beam 1535 are respectively connected to the first side beam 1531 and the second side beam 1532. The first side beam 1531, the second side beam 1532, the first cross beam 1533, the second cross beam 1534 and the third cross beam 1535 provide support for the equipment installed in the box-type substation 10.

[0068] Continue as Figure 6 As shown, the bottom frame 153 may further include a bottom plate 1536. The bottom plate 1536 is located in a space surrounded by the first side beam 1531, the second side beam 1532, the first cross beam 1533 and the third cross beam 1535. The surrounding sides of the bottom plate 1536 are respectively connected to the first side beam 1531, the second side beam 1532, the first cross beam 1533 and the third cross beam 1535. The surrounding sides of the bottom plate 1536 are respectively connected to the first side beam 1531, the second side beam 1532, the first cross beam 1533 and the third cross beam 1535. The first side beam 1531, the second side beam 1532, the first cross beam 1533, the third cross beam 1535, the bottom plate 1536, the side plate 1561 and the cover plate 1562 surround the oil storage chamber 152. The first side beam 1531, the second side beam 1532, the first cross beam 1533 and the third cross beam 1535 provide support for the bottom plate 1536 and the side plate 1561, thereby ensuring the structural stability of the box body 15 and reducing the occurrence of oil leakage in the oil storage cavity 152 due to structural damage of the box body 15.

[0069] In addition, continue Figure 6 As shown, the bottom plate 1536 is located in the space surrounded by the first side beam 1531, the second side beam 1532, the first cross beam 1533 and the third cross beam 1535. That is, the bottom plate 1536 is located between the first cross beam 1533 and the third cross beam 1535. The space between the second cross beam 1534 and the third cross beam 1535 will not be blocked by the bottom plate 1536, so it is convenient to install other equipment (such as Figure 2 The first distribution cabinet 11 or the second distribution cabinet 12 shown in the figure). Moreover, after the first side beam 1531, the second side beam 1532, the first cross beam 1533, the third cross beam 1535, the bottom plate 1536 and the oil storage cover 156 enclose the oil storage chamber 152, at least a part of the oil storage chamber 152 will be located in the space inside the bottom frame 153, so that the space enclosed by the bottom frame 153 can be utilized, thereby improving the space utilization rate of the box-type substation, thereby reducing the size required for the box-type substation, reducing the material cost, and further reducing the cost of the box-type substation.

[0070] Of course, in other embodiments of the present application, such as Figure 6 The bottom frame 153 in the box-type substation shown may also include a first side beam 1531, a second side beam 1532, a first cross beam 1533, and a second cross beam 1534. The peripheral side of the bottom plate 1536 may be respectively connected to the first side beam 1531, the second side beam 1532, the first cross beam 1533, and the second cross beam 1534. The first distribution cabinet 11 and the second distribution cabinet 12 may be arranged on the bottom plate 1536, and the bottom plate 1536 may support the first distribution cabinet 11 and the second distribution cabinet 12.

[0071] Alternatively, in other embodiments of the present application, the bottom plate 1536 may also be disposed on a side of the bottom frame 153 facing the transformer 13. Alternatively, the bottom plate 1536 may also be disposed on a side of the bottom frame 153 facing away from the transformer 13.

[0072] For example, Figure 6 The connection method of any two components among the bottom plate 1536, the first side beam 1531, the second side beam 1532, the first cross beam 1533 and the third cross beam 1535 shown in the figure can be sealed welding. For example, the connection of any two components among the bottom plate 1536, the first side beam 1531, the second side beam 1532, the first cross beam 1533 and the third cross beam 1535 is sealed by full welding, so as to prevent the oil from flowing out of the oil storage chamber 152 from the connection of the bottom plate 1536, the first side beam 1531, the second side beam 1532, the first cross beam 1533 and the third cross beam 1535.

[0073] For example, Figure 6 The materials of the first side beam 1531, the second side beam 1532, the first cross beam 1533, the second cross beam 1534, the third cross beam 1535, the vertical beam 154, the top plate 155, the bottom plate 1536 and the oil storage cover 156 shown can all be steel materials or aluminum alloy materials, etc.

[0074] As another example, Figure 6 The first side beam 1531 , the second side beam 1532 , the first cross beam 1533 , the second cross beam 1534 , and the third cross beam 1535 shown in the figure may all be channel steels or angle steels.

[0075] The specific structure of the oil storage cover 156 is described below. Figure 7 As shown, the oil storage cover 156 may include a side plate 1561 and a cover plate 1562. The side plate 1561 is disposed on the side of the bottom frame 153 facing the transformer 13 and is connected to the bottom frame 153. The cover plate 1562 is covered on the side plate 1561 and is connected to the side plate 1561. After the side plate 1561 is disposed on the bottom frame 153, the bottom frame 153, the side plate 1561 and the cover plate 1562 enclose the oil storage chamber 152 (as shown in FIG. Figure 4 shown).

[0076] For example, continue as Figure 7 As shown, the side plate 1561 surrounds the bottom plate 1536 (as shown in FIG. Figure 6 The first side beam 1531, the second side beam 1532, the first cross beam 1533, the third cross beam 1535, the bottom plate 1536, the side plate 1561 and the Figure 7The cover plate 1562 shown in the figure encloses the oil storage chamber 152. In the direction perpendicular to the horizontal plane, the side plate 1561 can increase the size of the oil storage chamber 152, increase the volume of the oil storage chamber 152, and then ensure that the oil storage chamber 152 can accommodate more oil to meet the storage requirements of the box-type substation 10 for leaked oil.

[0077] Again illustratively, continue as Figure 7 As shown, the side plate 1561 can be connected to the surface S of the first side beam 1531 facing the top plate 155, and at least a portion of the surface S is located in the oil storage cavity 152 (such as Figure 3 In this way, when the height of the side plate 1562 is constant, a part of the space above the surface S of the first side beam 1531 can be utilized, thereby increasing the volume of the oil storage chamber 152.

[0078] Of course, the plate 1561 can also be located in the oil storage cavity 152 together with a portion of the surface of the second side beam 1532 facing the top plate 155, the surface of the first cross beam 1533 facing the top plate 155, and the surface of the third cross beam 1535 facing the top plate 155, so as to further increase the volume of the oil storage cavity 152.

[0079] Continue as Figure 7 As shown, the transformer 13 is connected to the side of the cover plate 1562 facing away from the bottom frame 153. The cover plate 1562 can support the transformer 13.

[0080] For example, Figure 7 The side plate 1561 in the box-type substation shown can be sealed and welded with the bottom frame 153 to prevent the oil from flowing out of the oil storage chamber 152 from the connection between the side plate 1561 and the bottom frame 153.

[0081] As another example, the side plate 1561 and the cover plate 1562 may be welded. Alternatively, the side plate 1561 and the cover plate 1562 may also be connected by a first screw (not shown in the figure).

[0082] Alternatively, in some embodiments of the present application, Figure 8 As shown, the oil storage cover 156 can also be a cover plate 1562. The cover plate 1562 is covered on the bottom frame 153 and connected to the bottom frame 153. The bottom frame 153 and the cover plate 1562 together form a Fig. 9 ( Figure 8 The oil storage cavity 152 (in the partial cross-sectional view of the box-type substation 10 along the P1-P2 direction) is shown Figure 8 In this case, the oil storage chamber 152 does not occupy the space above the bottom frame 153. When the size of the box-type substation 10 is fixed, the volume of the accommodating space 151 is relatively large, which facilitates the installation of the transformer 13 (such as Figure 2As shown) and other equipment to reduce the required height dimension of the box 15.

[0083] Continue as Figure 7 or Figure 8 As shown, the cover plate 1562 may be provided with an oil inlet hole 15621 penetrating the cover plate 1562. The transformer 13 (eg, Figure 7 After the oil leaks, the oil drips onto the cover plate 1562. The cover plate 1562 is used to receive the oil, and the oil flows into the oil storage chamber 152 (as shown in FIG. Fig. 9 Store in the storage area.

[0084] Furthermore, if Figure 7 or Figure 8 The portion of the cover plate 1562 in the box-type substation shown, which is located around the oil inlet hole 15621, can be recessed in a direction away from the transformer 13, thereby ensuring that under the action of gravity, the oil dripping on the cover plate 1562 can flow to the oil inlet hole 15621.

[0085] Of course, in some other embodiments of the present application, there may be a gap between the cover plate 1562 and the side plate 1561. The gap between the cover plate 1562 and the side plate 1561 may serve as the oil inlet hole 15621.

[0086] To prevent the oil from flowing away from the side of the cover plate 1562. Figure 7 As shown, the oil storage cover 156 may further include an oil retaining flange 1563. The oil retaining flange 1563 is located on the side of the cover plate 1562 facing the transformer 13. The oil retaining flange 1563 is arranged on the side of the cover plate 1562 facing the transformer 13. The oil retaining flange 1563 is arranged around the edge of the cover plate 1562. After the oil leaked from the transformer 13 drips onto the cover plate 1562, the oil retaining flange 1563 can prevent the oil from flowing away from the peripheral side of the cover plate 1562, and prevent the oil from leaking out of the box body 15. It is ensured that the oil can flow into the oil storage cavity 152 through the oil inlet hole 15621 and be stored.

[0087] It is understandable that the oil retaining flange 1563 and the cover plate 1562 can enclose an oil retaining groove 1564. The oil retaining groove 1564 is connected to the oil storage cavity 152 (such as Figure 4 After the leaked oil of the transformer 13 drips into the oil retaining groove 1564, the oil retaining flange 1563 can prevent the oil from flowing out of the oil retaining groove 1564. This ensures that the oil can flow into the oil storage cavity 152 through the oil inlet hole 15621 and be stored.

[0088] Alternatively, in some embodiments of the present application, Figure 7The cover plate 1562 in the box-type substation shown may be provided with an oil retaining groove 1564 on one side surface facing the transformer 13. The side wall of the oil retaining groove 1564 is used to limit the oil in the oil retaining groove 1564 to prevent the oil from flowing away from the peripheral side of the cover plate 1562.

[0089] In some embodiments of the present application, continue as Figure 7 As shown, the cover plate 1562 and the oil retaining flange 1563 can be an integral structure. For example, the circumferential side of a whole plate-like structure can be bent upward. The bent portion serves as the oil retaining flange 1563, and the unbent portion serves as the cover plate 1562. This can save the cost of connecting the oil retaining flange 1563 and the cover plate 1562, further reducing the cost of the box-type substation 10.

[0090] Or, in other embodiments of the present application, Figure 7 The side plate 1561 and the oil retaining flange 1563 of the box-type substation shown can be an integral structure. When processing and manufacturing the oil storage cover 156, the side plate 1561 and the oil retaining flange 1563 are integrally formed into an integral structure. That is, the side plate 1561 and the oil retaining flange 1563 can be an integral plate-like structure, which is easy to process and manufacture. And it can save the cost of connecting the oil retaining flange 1563 and the cover plate 1562, further reducing the cost of the box-type substation 10.

[0091] Of course, in some other embodiments of the present application, the oil retaining flange 1563 may also be a plate-like structure, and the plate-like structure is welded or bonded to the cover plate 1562 .

[0092] like Fig.10 As shown, the cover plate 1562 has a groove 15622 on the surface facing the transformer 13. Fig.11 ( Fig.10 As shown in the enlarged view of the box-type substation 10 at A, the oil inlet hole 15621 is set at the bottom of the groove 15622. Figure 2 After the leaked oil flows to the cover plate 1562, it is easy to gather at the groove 15622, and then flow into the oil storage cavity 152 from the oil inlet hole 15621. It is conducive to the oil entering the oil storage cavity 152 from the oil inlet hole 15621 and being stored.

[0093] Furthermore, if Fig.11 As shown, the box-type substation 10 (such as Fig.10 The floor drain 16 is arranged at the oil inlet 15621 toward the transformer 13 (as shown in FIG. Figure 215621. The floor drain 16 is provided with a plurality of through holes 161. The through hole 161 is connected to the oil inlet hole 15621. The through hole 161 is an oblong hole or a rectangular hole. And the width of the through hole 161 is smaller than the diameter of the oil inlet hole 15621. At this time, some debris with a larger width cannot pass through the through hole 161. The floor drain 16 can prevent some larger debris from entering the oil storage chamber 152 through the oil inlet hole 15621. It also prevents some larger debris from getting stuck in the oil inlet hole 15621, causing the oil inlet hole 15621 to be blocked. When the through hole 161 is an oblong hole or a rectangular hole, under the condition of the same width, the opening area of ​​the through hole 161 is larger, ensuring the oil leakage effect. When the through hole 161 of the floor drain 16 is blocked, the floor drain 16 can be removed from the cover plate 1562, cleaned, and reinstalled on the cover plate 1562.

[0094] For example, continue as Fig.11 As shown, the floor drain 16 can be connected to the cover plate 1562 through the side plate 1561 by the second screw 17. Fig.12 ( Fig.11 As shown in the partial cross-sectional view of the box-type substation along the N1-N2 direction, a strip reinforcement rib 18 is provided in the oil inlet hole 15621, and both ends of the strip reinforcement rib 18 can be connected to the inner wall of the oil inlet hole 15621. The side plate 1561 is connected to the strip reinforcement rib 18 by a second screw 17.

[0095] like Fig.13 As shown, the box body 15 is provided with at least one oil storage cavity 152 (such as Figure 4 When cleaning and maintenance are required, the liquid in the oil storage chamber 152 can be discharged through the liquid outlet hole 1537.

[0096] For example, continue as Fig.13 As shown, the liquid outlet 1537 can be opened on the bottom frame 153, such as Figure 6 The liquid outlet 1537 may be disposed on any one or more of the first side beam 1531, the second side beam 1532, the first cross beam 1533, the third cross beam 1535 or the bottom plate 1536 shown in FIG. Alternatively, for example, the liquid outlet 1537 may also be disposed on the side plate 1561. The embodiment of the present application is not specifically limited.

[0097] Furthermore, if Fig.14 As shown, the box-type substation 10 also includes an oil-water separator 19. The oil-water separator 19 and the liquid outlet 1537 (such as Fig.13 When the oil storage chamber 152 (as shown) is connected Figure 4When rainwater or other water enters the oil storage chamber 152, the oil-water separator 19 can separate the water in the oil storage chamber 152 and discharge it out of the oil storage chamber 152. This prevents water from occupying too much volume, thereby reducing the amount of oil that can be stored in the oil storage chamber 152. It also prevents the water in the oil storage chamber 152 from freezing and expanding in volume in cold weather, thereby avoiding damage to the box body 15.

[0098] like Fig.15 or Fig.16 As shown, the first power distribution cabinet 11 may include a first cabinet body 111 and a first cabinet door 112. The first cabinet door 112 may be covered on the first cabinet body 111 and rotatably connected to the first cabinet body 111. The first cabinet body 111 and the first cabinet door 112 protect the equipment in the first cabinet body 111.

[0099] Continue as Fig.15 or Fig.16 As shown, the second power distribution cabinet 12 may include a second cabinet body 121 and a second cabinet door 122. The second cabinet door 122 may be covered on the second cabinet body 121 and rotatably connected to the second cabinet body 121. The second cabinet body 121 and the second cabinet door 122 protect the equipment in the second cabinet body 121.

[0100] In some embodiments of the present application, continue as Fig.15 As shown, along the third direction Y, the first cabinet door 112 can be located on the side of the first cabinet 111 away from the second power distribution cabinet 12. The side of the first cabinet 111 away from the second power distribution cabinet 12 will not be blocked by the second power distribution cabinet 12 and the transformer 13, thereby facilitating the staff to open the first cabinet door 112 and perform maintenance operations on the equipment in the first cabinet 111.

[0101] Continue as Fig.15 As shown, along the third direction Y, the second cabinet door 122 can be located on the side of the second cabinet 121 away from the first power distribution cabinet 11. The side of the second cabinet 121 away from the first power distribution cabinet 11 will not be blocked by the first power distribution cabinet 11 and the transformer 13, thereby facilitating the staff to open the second cabinet door 122 and perform maintenance operations on the equipment in the second cabinet 121.

[0102] Or, in some other embodiments of the present application, continue as Fig.16 As shown, along the third direction Y, the first cabinet door 112 can also be located on the side of the first cabinet 111 away from the transformer 13. The side of the first cabinet 111 away from the transformer 13 will not be blocked by the second distribution cabinet 12 and the transformer 13, so it is convenient for the staff to open the first cabinet door 112.

[0103] Continue as Fig.16As shown, along the third direction Y, the second cabinet door 122 can also be located on the side of the second cabinet 121 away from the transformer 13. The side of the second cabinet 121 away from the first distribution cabinet 11 will not be blocked by the first distribution cabinet 11 and the transformer 13, making it easy for the staff to open the second cabinet door 122.

[0104] In order to operate and maintain the equipment in the box 15, in some solutions, the box-type substation 10 is provided with a switch door on the box 15, and the staff needs to open the switch door before operating and maintaining the equipment in the box 15. In order to ensure that the first distribution cabinet 11 and the second distribution cabinet 12 in the box 15 can be exposed after opening the switch door, the switch door needs to be set larger, which is more laborious for the staff to open and close, and the work intensity is high.

[0105] In order to reduce the workload of staff, Fig.15 or Fig.16 As shown, among the plurality of vertical beams 154 , the gap between two adjacent vertical beams 154 exposes the first cabinet door 112 or the second cabinet door 122 .

[0106] For example, Fig.15 As shown, the gap B between two adjacent vertical beams 154 exposes the first cabinet door 112. The gap C between the other two adjacent vertical beams 154 (located on the side of the second power distribution cabinet 12 away from the gap B) exposes the second cabinet door 122. During operation and maintenance, the staff only needs to pass through the gap B to open the first cabinet door 112. Alternatively, the staff only needs to pass through the gap C to open the second cabinet door 122.

[0107] Or, again illustratively, if Fig.16 As shown, the gap D between two adjacent vertical beams 154 exposes the first cabinet door 112 and the second cabinet door 122. During operation and maintenance, the staff only needs to pass through the gap D to open the first cabinet door 112 or the second cabinet door 122.

[0108] And as Fig.15 or Fig.16 In any of the embodiments shown, when the first cabinet door 112 is opened, only the equipment in the first cabinet 111 needs to be exposed. Therefore, the first cabinet door 112 is relatively small, which is convenient for the staff to open and close. Similarly, at this time, when the second cabinet door 122 is opened, only the equipment in the second cabinet 121 needs to be exposed. Therefore, the second cabinet door 122 is also relatively small, which is convenient for the staff to open and close. In this way, while reducing the material cost required for setting the opening and closing doors, the work intensity of the staff during the operation and maintenance of the first distribution cabinet 11 and the second distribution cabinet 12 is reduced.

[0109] Alternatively, in other embodiments of the present application, the box 15 may also be a closed container, and a switch door (not shown) is provided on one side of the box 15. When the switch door is opened, the first power distribution cabinet 11 and the second power distribution cabinet 12 in the box 15 can be exposed.

[0110] The above is only a specific implementation of the present application, but the protection scope of the present application is not limited thereto. Any changes or substitutions within the technical scope disclosed in the present application should be included in the protection scope of the present application. Therefore, the protection scope of the present application should be based on the protection scope of the claims.

Claims

1. A box-type substation, characterized in that: include: The first distribution cabinet; Second power distribution cabinet; A cable, one end of which is electrically connected to the first power distribution cabinet, and the other end of which is electrically connected to the second power distribution cabinet; A transformer, the first power distribution cabinet and the second power distribution cabinet are both electrically connected to the transformer; the first power distribution cabinet is used to transmit a current with a first voltage to the transformer, and the transformer is used to transmit a current with a second voltage to the second power distribution cabinet, and the first voltage and the second voltage are not equal; A box body, the box body encloses a accommodating space and an oil storage cavity, the first distribution cabinet, the second distribution cabinet and the transformer are all arranged in the accommodating space; along the first direction, the cables, the first distribution cabinet and the second distribution cabinet are all located on the same side of the transformer; and along the second direction, the oil storage cavity is located at the bottom of the transformer, the oil storage cavity is used to receive the oil of the transformer, the second direction is the height direction of the box body, and the second direction is perpendicular to the first direction.

2. The box-type substation according to claim 1, characterized in that: The first power distribution cabinet and the second power distribution cabinet are arranged side by side along a third direction, and the third direction is perpendicular to both the first direction and the second direction.

3. The box-type substation according to claim 1, characterized in that: The box body comprises: A bottom frame, on which the transformer, the first power distribution cabinet and the second power distribution cabinet are all arranged; A plurality of vertical beams, one end of each vertical beam being connected to the bottom frame; A top plate, which is arranged to cover the other end of the vertical beam away from the bottom frame, and the bottom frame, the plurality of vertical beams and the top plate form the accommodation space; An oil storage cover is buckled on the bottom frame, and the bottom frame and the oil storage cover enclose the oil storage cavity.

4. The box-type substation according to claim 3, characterized in that: The oil storage cap comprises: A side plate, the side plate is arranged on a side of the bottom frame facing the transformer, and the side plate is connected to the bottom frame; A cover plate is disposed on the side plate and connected to the side plate.

5. The box-type substation according to claim 4, characterized in that: The bottom frame comprises: a first side beam; a second side beam, the second side beam being arranged side by side with the first side beam in a third direction, the third direction being perpendicular to both the first direction and the second direction; A first cross beam, wherein two ends of the first cross beam are respectively connected to one end of the first side beam and one end of the second side beam; A second cross beam, two ends of the second cross beam being respectively connected to the other end of the first side beam and the other end of the second side beam; A third crossbeam, the third crossbeam is located between the first crossbeam and the second crossbeam, and two ends of the third crossbeam are connected to the first side beam and the second side beam respectively; A bottom plate, the bottom plate is located in a space enclosed by the first side beam, the second side beam, the first cross beam and the third cross beam; the peripheral sides of the bottom plate are respectively connected to the first side beam, the second side beam, the first cross beam and the third cross beam; the first side beam, the second side beam, the first cross beam, the third cross beam, the bottom plate, the side plate and the cover plate enclose the oil storage cavity.

6. The box-type substation according to any one of claims 4-5, characterized in that: The cover plate is provided with an oil inlet hole penetrating the cover plate, the oil inlet hole is communicated with the oil storage cavity, and the cover plate is used to receive the oil.

7. The box-type substation according to claim 6, characterized in that: The oil storage cap also includes: An oil retaining flange is arranged on a side of the cover plate facing the transformer, and the oil retaining flange is arranged around an edge of the cover plate.

8. The box-type substation according to claim 7, characterized in that: The cover plate and the oil retaining flange are an integral structure; or the side plate and the oil retaining flange are an integral structure.

9. The box-type substation according to any one of claims 6 to 8, characterized in that: The cover plate has a groove on its surface facing the transformer, and the oil inlet hole is arranged at the bottom of the groove.

10. The box-type substation according to any one of claims 6 to 8, characterized in that: The box-type substation also includes: A floor drain is arranged at the opening of the oil inlet toward the transformer and is detachably connected to the cover plate. A plurality of through holes are provided on the floor drain, and the through holes are connected to the oil inlet. The through holes are oblong holes or rectangular holes, and the width of the through holes is smaller than the diameter of the oil inlet.

11. The box-type substation according to any one of claims 1 to 10, characterized in that: The box body is provided with at least one liquid outlet hole which is communicated with the oil storage cavity.

12. The box-type substation according to claim 11, characterized in that: The box-type substation also includes: An oil-water separator is connected to the liquid outlet and is used to separate the water in the oil storage cavity and discharge the water.

13. The box-type substation according to claim 1, characterized in that: The first power distribution cabinet comprises: First cabinet; A first cabinet door is rotatably connected to the first cabinet body; the first cabinet door is located on a side of the first cabinet body away from the second power distribution cabinet, or the first cabinet door is located on a side of the first cabinet body away from the transformer; The second power distribution cabinet comprises: Second cabinet; The second cabinet door is rotatably connected to the second cabinet body; the second cabinet door is located on a side of the second cabinet body away from the first distribution cabinet, or the second cabinet door is located on a side of the second cabinet body away from the transformer.

14. A power system, characterized in that: It comprises a box-type substation and an inverter as described in any one of claims 1 to 13, and the first distribution cabinet is electrically connected to the inverter.

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