Compact box-type transformer

Abstract

The invention discloses a compact box-type transformer, which can reduce the occupied area of the compact box-type transformer, lower the temperature rise of the compact box-type transformer and lower the construction and equipment cost of the compact box-type transformer. The compact box-type transformer comprises a box body, a transformer body (3), a photovoltaic panel (11) and an energy storage assembly. A low-voltage chamber (2) and a high-voltage chamber (1) are arranged in the box body. And the transformer body (3) is arranged above the box body. And a photovoltaic panel (11) is arranged above the transformer body (3). And the energy storage assembly is arranged in the low-voltage chamber (2), is electrically connected with the output end of the photovoltaic panel (11), and is used for storing electric energy generated by the photovoltaic panel (11) so as to supply power to external electric equipment.

Description

Technical Field

[0001] The invention belongs to the technical field of box-type transformers, and in particular relates to a compact box-type transformer. Background Art

[0002] On March 27, 2023, the Global Wind Energy Council (GWEC) released the Global Wind Report 2023 in Sao Paulo, Brazil. The report predicts that by 2024, the global onshore wind power installed capacity will exceed 100GW for the first time; by 2025, the global offshore wind power installed capacity will also set a new record, reaching 25GW. In the next five years, the global wind power grid-connected capacity will reach 680GW. Policymakers need to take immediate action to avoid supply chain bottlenecks that hinder the rapid development of global wind power.

[0003] As the scale of wind power and photovoltaic power generation continues to expand, their role in energy supply is becoming more and more obvious. According to the GWEC Global Wind Power Report, the annual new wind turbine installation capacity exceeds 110GW, and the market demand will be 5,000-10,000 new energy box transformers, that is, the market capacity is 1.7-3.5 billion per year. At the same time, in the context of wind power bidding and grid parity, how to effectively reduce the construction cost of wind farms has become a key factor in wind power development.

[0004] like Figure 1 As shown, Figure 1 A top view of a conventional new energy box transformer is shown. The conventional new energy box transformer is arranged in a herringbone or L shape. The transformer body 3, the high-voltage chamber 1, and the low-voltage chamber 2 are located in the same plane, which occupies a large area, resulting in high land acquisition costs. Limited by the existing land acquisition area and budget, there is a situation where the existing box transformer structure layout cannot meet the needs of the site. At the same time, facing the increasingly competitive market and users whose investment is in a period of contraction, cost control is particularly important. In addition, because the existing transformer is set in the box, the heat dissipation effect is not good, which can easily lead to excessive temperature rise of the transformer, thereby increasing the failure rate. Summary of the invention

[0005] The technical problem to be solved by the present invention is to provide a compact box-type transformer in view of the above-mentioned deficiencies in the prior art, which can reduce the floor space of the compact box-type transformer, reduce the temperature rise of the compact box-type transformer, and reduce the construction and equipment costs of the compact box-type transformer.

[0006] An embodiment of the present invention provides a compact box-type transformer, which includes a box, a transformer body, a photovoltaic panel and an energy storage component. A low-voltage chamber and a high-voltage chamber are arranged inside the box. The transformer body is arranged above the box. The photovoltaic panel is arranged above the transformer body. The energy storage component is arranged in the low-voltage chamber and is electrically connected to the output end of the photovoltaic panel, and is used to store the electric energy generated by the photovoltaic panel to supply power to external electrical equipment.

[0007] In some embodiments, in the vertical direction, the orthographic projection of the transformer body is located within the orthographic projection range of the photovoltaic panel.

[0008] In some embodiments, in the vertical direction, the transformer body is located at the center of the photovoltaic panel, the area of ​​the transformer body is S1, the area of ​​the photovoltaic panel is S2, and 1.1S1≤S2≤1.4S1.

[0009] In some embodiments, a rubber isolation support is provided between the box and the bottom plate of the transformer body to absorb vibrations of the transformer body during operation.

[0010] In some embodiments, the rubber isolation support includes two steel plates and a rubber pad, and the rubber pad is sandwiched between the two steel plates.

[0011] In some embodiments, the low-voltage chamber is arranged near the low-voltage side of the transformer body, and a bus box is arranged on the low-voltage side of the transformer body. The bus box, the low-voltage side of the transformer body, and the top surface of the low-voltage chamber form a first sealed space, and a connecting bus is arranged in the first sealed space, one end of the connecting bus is connected to the low-voltage bushing on the low-voltage side of the transformer body, and the other end passes through the upper wall of the low-voltage chamber and is connected to the low-voltage power distribution equipment in the low-voltage chamber.

[0012] In some embodiments, the high-voltage chamber is arranged near the high-voltage side of the transformer body, and a high-voltage cable box is arranged on the high-voltage side of the transformer body. The high-voltage cable box, the high-voltage side of the transformer body, and the top surface of the high-voltage chamber form a second sealed space, and a high-voltage cable is arranged in the second sealed space, one end of the high-voltage cable is connected to the high-voltage bushing on the high-voltage side of the transformer body, and the other end passes through the upper wall of the high-voltage chamber and is connected to the high-voltage power distribution equipment in the high-voltage chamber.

[0013] In some embodiments, the high-voltage bushing is a pluggable bushing, and one end of the high-voltage cable connected to the high-voltage bushing is a pluggable elbow cable head, and the pluggable elbow cable head is compatible with the pluggable bushing.

[0014] In some embodiments, the interior of the high-voltage room is divided into two independent compartments, and the high-voltage power distribution equipment in the high-voltage room is distributed in the two compartments; each compartment is provided with a high-voltage indoor door that can be opened and closed and a corresponding locking assembly. Each locking assembly includes a sensor, an electromagnetic lock and a controller. The sensor is provided on the high-voltage cable to detect whether the high-voltage cable is energized and output the corresponding detection result. The electromagnetic lock is provided on the high-voltage indoor door. The controller is electrically connected to the sensor and the electromagnetic lock respectively, and is used to receive the detection results of the sensor, and control the electromagnetic lock to lock or unlock the high-voltage indoor door according to different detection results.

[0015] In some embodiments, each of the locking assemblies further comprises a display component. The display component is disposed on the corresponding high-voltage chamber inner door and is electrically connected to the controller. The controller is further configured to output the received detection result to the display component so that the display component displays whether the high-voltage cable is energized.

[0016] Therefore, the compact box-type transformer provided by the embodiment of the present invention can reduce the overall footprint of the compact box-type transformer by arranging the transformer body above the box body, and can expose the transformer body as a whole to the air, which is conducive to accelerating the heat dissipation of the transformer body, thereby reducing the temperature rise of the transformer body. By arranging the photovoltaic panel above the transformer body to block the sunlight and reduce the direct exposure of the sunlight to the transformer body, the temperature rise of the transformer body can also be reduced. And by electrically connecting the energy storage component to the output end of the photovoltaic panel, the energy storage component can store the electric energy generated by the photovoltaic panel to supply power to external electrical equipment, provide a reliable power supply for the operation of the compact box-type transformer itself, and save the use of UPS and batteries, which is conducive to reducing the construction and equipment costs of the compact box-type transformer. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 : It is a top view of a box-type transformer in the prior art;

[0018] Figure 2 : is a front view of a compact box-type transformer provided in an embodiment of the present invention;

[0019] Figure 3 : It is a left view of a compact box-type transformer provided in an embodiment of the present invention;

[0020] Figure 4 : It is a right view of a compact box-type transformer provided in an embodiment of the present invention;

[0021] Figure 5 : A top view of a compact box-type transformer provided in an embodiment of the present invention after removing the photovoltaic panel;

[0022] Figure 6 : A top view of a compact box-type transformer provided in an embodiment of the present invention after removing the photovoltaic panel and the transformer body;

[0023] Figure 7 : is a wiring diagram of an energy storage assembly provided in an embodiment of the present invention;

[0024] Figure 8 : are multiple views of a high-voltage cable box provided in an embodiment of the present invention. DETAILED DESCRIPTION

[0025] In order to enable those skilled in the art to better understand the technical solution of the present invention, the present invention is further described in detail below with reference to the accompanying drawings and embodiments.

[0026] Embodiment 1:

[0027] like Figure 2 , Figure 3 and Figure 4 As shown, an embodiment of the present invention provides a compact box-type transformer, which is used in fields such as wind power and photovoltaic power generation, and is used for power distribution and transformation of power grids. For example, the compact box-type transformer in this embodiment is a 35kV box-type transformer.

[0028] like Figure 2 , Figure 3 and Figure 4 As shown, the compact box-type transformer includes a box, a transformer body 3, a photovoltaic panel 11 and an energy storage assembly. A low-voltage chamber 2 and a high-voltage chamber 1 are arranged inside the box. The transformer body 3 is arranged above the box.

[0029] For example, the box body is welded by I-beams and square tubes, and the overall container production process is adopted. The overall box can meet a higher load-bearing effect (15 tons), can protect the equipment located inside it, and achieve dust-proof, waterproof and other effects.

[0030] like Figure 2 , Figure 5 and Figure 6 As shown, the interior of the box is divided into a low-voltage chamber 2 and a high-voltage chamber 1, and the low-voltage chamber 2 and the high-voltage chamber 1 are separated by a partition. A reinforcement part is provided on the partition to increase the strength of the partition to support the transformer body 3 on the upper part.

[0031] Exemplarily, the reinforcement portion is a steel square tube.

[0032] For example, Figure 2 In the figure, the left side is the high-voltage chamber 1, the right side is the low-voltage chamber 2, the high-voltage chamber 1, the low-voltage chamber 2, and the transformer body 3 are in Figure 2The upper and lower layers are arranged in a herringbone shape in the view, so that the partition between the low-voltage chamber 2 and the high-voltage chamber 1 can better provide support for the transformer body 3.

[0033] For example, Figure 2 , Figure 4 and Figure 5 As shown, the low-voltage room 2 is used to install low-voltage power distribution equipment 5. The low-voltage power distribution equipment 5 is, for example, a low-voltage cabinet, which usually includes a low-voltage frame circuit breaker, surge, UPS power supply and auxiliary dry transformer. The lower side of the low-voltage unit is reserved with corresponding incoming openings according to the number of incoming cables on site, and the corresponding hanging position is reserved on the busbar.

[0034] For example, Figure 2 , Figure 5 and Figure 6 As shown, the high-voltage room 1 is used to install high-voltage power distribution equipment 4. The high-voltage power distribution equipment 4 is, for example, a 35kV five-in-one combined electrical appliance (including a high-voltage current transformer, a high-voltage lightning arrester, a vacuum circuit breaker, a disconnector, and a grounding switch). A cable connection copper bus is set between the left side of the combined electrical appliance and the insulator, and a copper bus interface is reserved according to the number of outgoing lines to ensure on-site needs.

[0035] It can be understood that the low-voltage power distribution equipment 5 and the high-voltage power distribution equipment are electrically connected to the transformer body 3. The box body is provided with a high-voltage outdoor door and a low-voltage outdoor door. When the high-voltage outdoor door is opened, the high-voltage power distribution equipment 4 in the high-voltage chamber 1 can be operated, and when the low-voltage outdoor door is opened, the low-voltage power distribution equipment 5 in the low-voltage chamber 2 can be operated.

[0036] Exemplarily, the transformer body 3 may be a wet transformer or a dry transformer. In this embodiment, the transformer body 3 is a wet transformer.

[0037] Exemplarily, the transformer body 3 is fixed to the top surface of the box body by bolts.

[0038] The transformer body 3 is arranged above the box body, so the transformer body 3 is exposed to the air as a whole, which is beneficial to the heat exchange between the transformer body 3 and the external air, thereby improving the heat dissipation effect of the transformer body 3, reducing the temperature rise of the transformer body 3, and helping to reduce the failure rate of the transformer body 3 and improve the stability of the transformer body 3 during operation.

[0039] Combination Figure 2 , Figure 3 and Figure 4 The photovoltaic panel 11 is arranged above the transformer body 3. The energy storage component is arranged in the low voltage chamber 2 and is electrically connected to the output end of the photovoltaic panel 11, and is used to store the electric energy generated by the photovoltaic panel 11 to supply power to external electrical equipment.

[0040] Exemplarily, the photovoltaic panel 11 is fixed on the box or the transformer body 3 by means of a movable bracket 10 , which can reduce the difficulty of installing and replacing the photovoltaic panel 11 .

[0041] Exemplarily, the movable brackets 10 are located at the four corners of the transformer body 3 , so that it is convenient to install and repair the equipment on the transformer body 3 through the gap between the two movable brackets 10 .

[0042] The photovoltaic panel 11 can reduce direct sunlight on the transformer body 3, and thus can also reduce the temperature rise of the transformer body 3, which is beneficial to reducing the failure rate of the transformer body 3 and improving the stability of the transformer body 3 during operation.

[0043] In addition, the photovoltaic panel 11 also has a certain rainproof effect, which can reduce the impact of rainwater on the cable connection in the compact box-type transformer and improve the safety of the compact box-type transformer.

[0044] For example, Figure 4 As shown, the energy storage assembly includes an inverter 12 and an energy storage battery 13 , and both the inverter 12 and the energy storage battery 13 are fixed in the low-voltage chamber 2 .

[0045] For example, Figure 7 As shown, the photovoltaic panel 11 enters the low-voltage chamber 2 through the busbar cable and the cable trough box, and is connected to the input end of the inverter 12. The power generated by the photovoltaic panel 11 is converted from DC power to 400V AC power after the inverter 12 is acted on, and is output from the output end of the inverter 12. The output end of the inverter is connected to the input end of the energy storage battery 13, and the energy storage battery 13 can store the power generated by the photovoltaic panel 11 to meet the power demand when the photovoltaic panel 11 is not generating electricity. The output end of the energy storage battery 13 is connected to the input end of the control circuit main switch, and the output end of the control circuit main switch is connected to multiple external power-consuming devices.

[0046] Exemplarily, the above-mentioned multiple external electrical equipment may include a high-voltage control power supply, a low-voltage control power supply, a measurement and control device power supply, a switch + longitudinal density power supply, a transformer thermostat power supply, an electromagnetic lock power supply, multiple backup power supplies, a high-voltage cabinet lighting power supply, a box transformer lighting + smoke power supply, a fan + heating + dehumidifier power supply, a three-hole socket power supply, a four-hole socket power supply, etc.

[0047] Through the above arrangement, a reliable power supply can be provided for the operation of the compact box-type transformer itself, eliminating the use of UPS and batteries, which is conducive to reducing the construction and equipment costs of the compact box-type transformer.

[0048] Therefore, the compact box-type transformer provided by the embodiment of the present invention can reduce the overall footprint of the compact box-type transformer by arranging the transformer body 3 above the box body, and can expose the transformer body 3 as a whole to the air, which is beneficial to improving the heat dissipation effect of the transformer body 3, thereby reducing the temperature rise of the transformer body 3. By arranging the photovoltaic panel 11 above the transformer body 3, the photovoltaic panel 11 can block the sunlight, which can reduce the direct exposure of the sunlight to the transformer body 3, and thus can also reduce the temperature rise of the transformer body 3. And by electrically connecting the energy storage component to the output end of the photovoltaic panel 11, the energy storage component can store the electric energy generated by the photovoltaic panel 11 to supply power to external electrical equipment, provide a reliable power supply for the operation of the compact box-type transformer itself, save the use of UPS and batteries, and help reduce the construction and equipment costs of the compact box-type transformer.

[0049] In some embodiments, Figure 2 , Figure 3 and Figure 4 As shown, in the vertical direction, the orthographic projection of the transformer body 3 is located within the orthographic projection range of the photovoltaic panel 11 .

[0050] That is, in the vertical direction, the photovoltaic panel 11 can completely block the transformer body 3, so that the photovoltaic panel 11 can provide a better shielding effect for the transformer body 3 in multiple directions, further reducing the temperature impact of direct sunlight on the transformer body 3, reducing the temperature rise of the transformer body 3, and reducing the impact of rain on the compact box transformer.

[0051] In some embodiments, in the vertical direction, the transformer body 3 is located at the center of the photovoltaic panel 11 , the area of ​​the transformer body 3 is S1 , the area of ​​the photovoltaic panel 11 is S2 , and 1.1S1≤S2≤1.4S1.

[0052] Exemplarily, in the vertical direction, the transformer body 3 is in a rectangular shape, the photovoltaic panel 11 is in a rectangular shape, and the center of the transformer body 3 coincides with the center of the photovoltaic panel 11 .

[0053] For example, the area S1 of the transformer body 3 is 5m 2 , then the area S2 of the photovoltaic panel 11 satisfies, 5.5m 2 ≤S2≤7m 2 For example, the area S2 of the photovoltaic panel 11 is 5.5m 2 、6m 2 or 7m 2 wait.

[0054] Through the above arrangement, the photovoltaic panel 11 can extend a certain length in each horizontal direction of the transformer body 3, which can provide better sunshade and rainproof effect for the transformer body 3, thereby reducing the temperature rise of the transformer body 3 and improving the safety of the compact box-type transformer. In addition, the above arrangement can also avoid the increase of the wind resistance of the photovoltaic panel 11 due to the excessive area of ​​the photovoltaic panel 11, which is conducive to maintaining the stability of the photovoltaic panel 11 structure.

[0055] In some embodiments, a rubber isolation support is provided between the box and the bottom plate of the transformer body 3 to absorb vibrations of the transformer body 3 during operation.

[0056] Exemplarily, there are multiple rubber isolation supports, and the multiple rubber isolation supports are evenly distributed between the box and the bottom plate of the transformer body 3.

[0057] Through the above arrangement, the influence of the vibration of the transformer body 3 on the box body can be reduced, which is beneficial to reducing the noise during the operation of the compact box-type transformer and reducing the wear between the box body and the bottom plate of the transformer body 3.

[0058] In some embodiments, the rubber isolation support includes two steel plates and a rubber pad, and the rubber pad is sandwiched between the two steel plates.

[0059] Exemplarily, the thickness of the rubber pad can be set according to the weight of the transformer body 3. For example, the thickness of the rubber pad can be 9 mm, 10 mm, or 11 mm.

[0060] The steel plates on both sides can increase the contact strength of the rubber isolation bearing, thereby increasing the service life of the rubber isolation bearing.

[0061] In some embodiments, Figure 2 and Figure 4 As shown, the low-voltage chamber 2 is arranged near the low-voltage side of the transformer body 3, and a bus box 8 is arranged on the low-voltage side of the transformer body 3. The bus box 8, the low-voltage side of the transformer body 3, and the top surface of the low-voltage chamber 2 form a first sealed space, and a connecting bus 9 is arranged in the first sealed space. One end of the connecting bus 9 is connected to the low-voltage bushing on the low-voltage side of the transformer body 3, and the other end passes through the upper wall of the low-voltage chamber 2 and is connected to the low-voltage power distribution equipment 5 in the low-voltage chamber 2.

[0062] Exemplarily, the contact point between the bus box 8 and the box body, and the contact point between the bus box 8 and the low-voltage side of the transformer body 3 are both provided with finished rectangular sealing strips, which can prevent rainwater from entering the bus box 8.

[0063] Exemplarily, a wire hole is reserved on the upper wall of the low-voltage chamber 2 for the connecting busbar 9 to pass through.

[0064] Exemplarily, the connecting busbar 9 is a copper busbar. One end of the connecting busbar 9 passes through the upper wall of the low-voltage chamber 2 and is connected to the low-voltage circuit breaker in the low-voltage power distribution equipment 5.

[0065] The above arrangement facilitates the connection between the low-voltage power distribution equipment 5 and the transformer body 3 and prevents the connecting busbars 9 in the busbar box 8 from getting wet.

[0066] In some embodiments, Figure 2 and Figure 8 As shown, the high-voltage chamber 1 is arranged near the high-voltage side of the transformer body 3, and a high-voltage cable box 6 is arranged on the high-voltage side of the transformer body 3. The high-voltage cable box 6, the high-voltage side of the transformer body 3, and the top surface of the high-voltage chamber 1 form a second sealed space, and a high-voltage cable 7 is arranged in the second sealed space. One end of the high-voltage cable 7 is connected to the high-voltage bushing on the high-voltage side of the transformer body 3, and the other end passes through the upper wall of the high-voltage chamber 1 and is connected to the high-voltage power distribution equipment in the high-voltage chamber 1.

[0067] Exemplarily, the contact points between the high-voltage cable box 6 and the box body, and the contact points between the high-voltage cable box 6 and the high-voltage side of the transformer body 3 are both provided with finished rectangular sealing strips to prevent rainwater from entering the high-voltage cable box 6 .

[0068] Exemplarily, the upper wall of the high-voltage chamber 1 is reserved with a wire hole for the high-voltage cable 7 to pass through. The high-voltage cable 7 is an ERF soft cable suitable for 35KV.

[0069] Exemplarily, one end of the high-voltage cable 7 passes through the upper wall of the high-voltage chamber 1 and is connected to the circuit breaker in the high-voltage power distribution equipment 4 .

[0070] The above arrangement facilitates the connection between the high-voltage power distribution equipment 4 and the transformer body 3, and prevents the high-voltage cables 7 in the high-voltage cable box 6 from getting wet.

[0071] In some embodiments, the high-voltage bushing is a pluggable bushing, and one end of the high-voltage cable 7 connected to the high-voltage bushing is a pluggable elbow cable head, which is compatible with the pluggable bushing.

[0072] Through the above arrangement, the connection difficulty between the high-voltage cable 7 and the high-voltage bushing can be simplified, and it is helpful to reduce the space occupied by the high-voltage bushing and the high-voltage cable 7 and reduce the total volume of the compact box-type transformer.

[0073] In some embodiments, in combination Figure 2 and Figure 6The interior of the high-voltage chamber 1 is divided into two independent compartments, and the high-voltage power distribution equipment in the high-voltage chamber 1 is distributed in the two compartments; each compartment is provided with a high-voltage indoor door that can be opened and closed and a corresponding locking assembly. Each locking assembly includes a sensor, an electromagnetic lock and a controller. The sensor is arranged on the high-voltage cable 7, and is used to detect whether the high-voltage cable 7 is energized, and output the corresponding detection result. The electromagnetic lock is arranged on the high-voltage indoor door. The controller is electrically connected to the sensor and the electromagnetic lock, respectively, and is used to receive the detection results of the sensor, and control the electromagnetic lock to lock or unlock the high-voltage indoor door according to different detection results.

[0074] Exemplarily, of the two compartments, one compartment is used to set cables, and the other compartment is used to set various switches (such as isolating switches, grounding switches).

[0075] After opening the door inside the high-voltage chamber, the equipment inside can be operated.

[0076] Exemplarily, the sensor may be an electric field sensor, which detects whether the high-voltage cable 7 is charged by detecting the electric field. The controller may be a general programmable logic controller.

[0077] After the sensor detects that the high-voltage cable 7 is energized, it outputs a first detection signal to the controller. After receiving and processing the first detection signal, the controller outputs a first control signal to the electromagnetic lock. The first control signal can cause the electromagnetic lock to lock the high-voltage room door so that the high-voltage room door cannot be opened, thereby avoiding accidental touching accidents by the operator when the high-voltage cable 7 is energized, thereby achieving the five-prevention effect.

[0078] After the sensor detects that the high-voltage cable 7 is not energized, it outputs a second detection signal to the controller. The controller receives the second detection signal and outputs a second control signal to the electromagnetic lock after processing. The second control signal can enable the electromagnetic lock to unlock the high-voltage room door. At this time, the high-voltage room door can be opened, and the operator can operate the equipment in the compartment.

[0079] Through the above arrangement, whether the high-voltage room door can be opened can be automatically controlled according to the charged state of the high-voltage cable 7, so as to avoid accidental touch accidents caused by operators operating the equipment in the compartment when the high-voltage cable 7 is energized.

[0080] In some embodiments, each locking assembly further includes a display component. The display component is disposed on the corresponding high-voltage chamber inner door and is electrically connected to the controller. The controller is also used to output the received detection result to the display component so that the display component displays whether the high-voltage cable is energized.

[0081] Exemplarily, the display component can be an indicator light, and the indicator light can emit red and blue light. When the sensor detects that the high-voltage cable 7 is energized, the controller outputs the received detection result to the display component, causing the display component to emit red light. When the sensor detects that the high-voltage cable 7 is not energized, the controller outputs the received detection result to the display component, causing the display component to emit blue light.

[0082] Through the above arrangement, the charged state of the high-voltage cable 7 can be monitored in real time, so that the operator can intuitively know the charged state of the high-voltage cable 7.

[0083] Through experiments, it was found that compared with the traditional box-type transformer, the compact box-type transformer of this embodiment can reduce the overall footprint of the box-type transformer by about 57%, and can reduce the temperature rise by about 15K, reduce the design cost by 2%, and reduce the construction and equipment cost by 5%, which can greatly reduce the space occupied by the box-type transformer.

[0084] It is to be understood that the above embodiments are merely exemplary embodiments used to illustrate the principles of the present invention, but the present invention is not limited thereto. For those of ordinary skill in the art, various modifications and improvements can be made without departing from the spirit and essence of the present invention, and these modifications and improvements are also considered to be within the scope of protection of the present invention.

Claims

1. A compact box-type transformer, characterized in that: include: A box body, wherein a low-pressure chamber (2) and a high-pressure chamber (1) are arranged inside; A transformer body (3) is arranged above the box; A photovoltaic panel (11) is arranged above the transformer body (3); and, An energy storage component is arranged in the low-voltage chamber (2) and is electrically connected to the output end of the photovoltaic panel (11), and is used to store the electric energy generated by the photovoltaic panel (11) to supply power to external electrical equipment.

2. The compact box-type transformer according to claim 1, characterized in that: In the vertical direction, the orthographic projection of the transformer body (3) is located within the orthographic projection range of the photovoltaic panel (11).

3. The compact box-type transformer according to claim 2, characterized in that: In the vertical direction, the transformer body (3) is located at the center of the photovoltaic panel (11), the area of ​​the transformer body (3) is S1, the area of ​​the photovoltaic panel (11) is S2, and 1.1S1≤S2≤1.4S1.

4. The compact box-type transformer according to claim 1, characterized in that: A rubber isolation support is provided between the box and the bottom plate of the transformer body (3) for absorbing vibrations of the transformer body (3) during operation.

5. The compact box-type transformer according to claim 4, characterized in that: The rubber isolation support comprises two steel plates and a rubber pad, and the rubber pad is sandwiched between the two steel plates.

6. The compact box-type transformer according to claim 1, characterized in that: The low-voltage chamber (2) is arranged close to the low-voltage side of the transformer body (3), and a busbar box (8) is arranged on the low-voltage side of the transformer body (3); The busbar box (8) forms a first sealed space with the low-voltage side of the transformer body (3) and the top surface of the low-voltage chamber (2). A connecting busbar (9) is arranged in the first sealed space. One end of the connecting busbar (9) is connected to the low-voltage bushing on the low-voltage side of the transformer body (3), and the other end passes through the upper wall of the low-voltage chamber (2) and is connected to the low-voltage power distribution equipment (5) in the low-voltage chamber (2).

7. The compact box-type transformer according to claim 1, characterized in that: The high-voltage chamber (1) is arranged close to the high-voltage side of the transformer body (3), and a high-voltage cable box (6) is arranged on the high-voltage side of the transformer body (3); The high-voltage cable box (6), the high-voltage side of the transformer body (3), and the top surface of the high-voltage chamber (1) form a second sealed space, and a high-voltage cable (7) is arranged in the second sealed space. One end of the high-voltage cable (7) is connected to the high-voltage bushing on the high-voltage side of the transformer body (3), and the other end passes through the upper wall of the high-voltage chamber (1) and is connected to the high-voltage power distribution equipment in the high-voltage chamber (1).

8. The compact box-type transformer according to claim 7, characterized in that: The high-voltage bushing is a plug-in bushing, and one end of the high-voltage cable (7) connected to the high-voltage bushing is a plug-in elbow-type cable head, which is compatible with the plug-in bushing.

9. The compact box-type transformer according to claim 7, characterized in that: The interior of the high-voltage chamber (1) is divided into two independent compartments, and the high-voltage power distribution equipment in the high-voltage chamber (1) is distributed in the two compartments; each compartment is provided with an openable and closable high-voltage chamber inner door and a corresponding locking assembly; Each of the locking assemblies comprises: A sensor, arranged on the high-voltage cable (7), for detecting whether the high-voltage cable (7) is charged and outputting a corresponding detection result; An electromagnetic lock, located on the high voltage room door; and, The controller is electrically connected to the sensor and the electromagnetic lock respectively, and is used to receive the detection result of the sensor and control the electromagnetic lock to lock or unlock the high-voltage room inner door according to different detection results.

10. The compact box-type transformer according to claim 9, characterized in that: Each of the locking assemblies further includes a display component; The display component is arranged on the corresponding inner door of the high-voltage chamber and is electrically connected to the controller; The controller is also used to output the received detection result to the display component, so that the display component displays whether the high-voltage cable is energized.

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