An intelligent solid-state transformer applied to a power system

Abstract

The application provides a kind of intelligent solid-state transformer applied to power system, it is related to transformer technical field, including transformer body and transformer cabinet, first heat dissipation part is equipped outside transformer cabinet, first passageway is formed in first heat dissipation part, transformer cabinet has first chamber;First action part is equipped in first chamber, when the temperature value inside transformer cabinet is less than or equal to first threshold value, first action part is stationary, air in transformer cabinet, first chamber and first passageway flows freely, and is cooled by natural cooling through first heat dissipation part;When the temperature value inside transformer cabinet is greater than first threshold value, first action part makes the air inside transformer cabinet flow to first passageway through first chamber, and is cooled by forced cooling through first heat dissipation part, guarantee the sealing of inside transformer cabinet, avoid outside dust, moisture intrusion inside transformer cabinet and adhere to component and transformer body surface, so as to guarantee equipment electrical performance and long-term operation reliability.

Description

Technical Field

[0001] This invention relates to the field of transformer technology, and in particular to a smart solid-state transformer for use in power systems. Background Technology

[0002] Transformers are core power conversion devices in power systems, particularly in transmission and distribution. When an alternating current flows through the primary coil, an alternating magnetic flux is generated in the iron core (or magnetic core), inducing a voltage in the secondary coil. Traditional power frequency transformers, due to their simple structure and reliable operation, have long been widely used as core devices for power transmission and voltage conversion. Solid-state transformers, also known as power electronic transformers, are new types of power conversion devices developed based on power electronic conversion technology and high-frequency isolation topologies. Currently, solid-state transformers often employ a three-stage topology, using wide-bandgap semiconductor devices such as SiC MOSFETs to achieve rectification, high-frequency electrical isolation and voltage conversion, and DC / DC step-down output. They can integrate auxiliary functions such as reactive power compensation and harmonic suppression, significantly reducing size and weight compared to power frequency transformers of the same capacity and improving power conversion efficiency. Furthermore, these transformers are equipped with dedicated cooling and other supporting technologies to ensure stable operation.

[0003] Solid-state transformers integrate the transformer body and a large number of power electronic components, requiring a dedicated transformer control cabinet to ensure their stable operation. Existing transformer cabinets mostly use fan-cooled heat dissipation, which requires the ventilation openings to remain open for a long time. External dust and moisture can easily enter the transformer cabinet with the airflow, adhering to the surface of components and the transformer body, thereby affecting the electrical performance and long-term operational reliability of the equipment.

[0004] The information disclosed in the background section of this invention is intended only to enhance the understanding of the general background of this invention, and should not be construed as an admission or in any way implying that such information constitutes prior art known to those skilled in the art. Summary of the Invention

[0005] Therefore, it is necessary to provide a smart solid-state transformer for power systems to address the problems existing in current solid-state transformers.

[0006] The above objectives are achieved through the following technical solutions:

[0007] A smart solid-state transformer for use in power systems includes a transformer body and a transformer cabinet. Multiple first heat sinks are provided on the exterior of the transformer cabinet, and a first passage is formed within each heat sink. The top of the transformer cabinet has a first chamber communicating with its interior. One end of the first passage is connected to the first chamber, and the other end is connected to the interior of the transformer cabinet. A first actuating part is provided within the first chamber, which allows air inside the transformer cabinet to flow through the first chamber to the first passage. When the temperature inside the transformer cabinet is less than or equal to a first threshold, the first actuating part remains stationary; when the temperature inside the transformer cabinet is greater than the first threshold, the first actuating part operates.

[0008] Furthermore, multiple first heat sinks are evenly distributed along a first direction, which is parallel to the side wall of the transformer cabinet. A movable component is provided between two adjacent first heat sinks. A driving component is provided on the transformer cabinet to make the movable component reciprocate between two adjacent first heat sinks. When the first actuating part is running, the driving component is activated.

[0009] Furthermore, the driving component includes a plurality of cams evenly distributed along the first direction, and the moving component is located between two adjacent cams; an impeller is rotatably provided in the first passage, and the impeller is coaxially arranged with the cams, so that the impeller can rotate when air flows in the first passage.

[0010] Furthermore, all cams are aligned in the same circumferential direction.

[0011] Furthermore, multiple second heat dissipation components are evenly distributed along the first direction on the exterior of the transformer cabinet, and a second passage is formed within each second heat dissipation component. The top of the transformer cabinet also has a second chamber communicating with its interior, and a dehumidifier is provided in the second chamber. One end of the second passage is connected to the second chamber, and the other end of the second passage is connected to the interior of the transformer cabinet. The transformer cabinet has an air inlet and an air outlet. A second actuating part is provided in the second chamber, which is used to allow outside air to enter the second chamber and the second passage through the air inlet and the dehumidifier. When the temperature inside the transformer cabinet is less than or equal to a first threshold, both the first and second actuating parts are stationary. When the temperature inside the transformer cabinet is greater than the first threshold but less than the second threshold, the first actuating part operates, the second actuating part is stationary, and the second threshold is greater than the first threshold. When the temperature inside the transformer cabinet is greater than or equal to the second threshold, both the first and second actuating parts operate, and the air inside the transformer cabinet can be discharged through the air outlet.

[0012] Furthermore, the desiccant has a waiting area and a used area. When the second actuating unit is running, outside air passes through the waiting area, and the air inside the transformer cabinet passes through the used area. A disc-shaped box is rotatably installed in the second chamber. The box divides the second chamber and is used to hold the desiccant. Mesh holes communicating with the interior are opened around the box. When the second actuating unit is running, the box rotates around its circumference, so that the waiting area and the used area switch back and forth in the circumference of the box.

[0013] Furthermore, the box body has multiple circumferential cavities inside, each containing a desiccant; a first partition is provided in the second cavity, with a first opening on the first partition, allowing cavities opposite to the first opening to be opened and cavities offset from the first opening to be closed; a side ring is provided in the second cavity, with the box body rotatably positioned within the side ring, and a side hole is provided on the side ring, allowing cavities opposite to the side hole to be opened and cavities offset from the side hole to be closed; a second opening is provided between the first and second cavities, allowing cavities opposite to the second opening to be opened and cavities offset from the second opening to be closed; the first partition also has... There is a third opening, the accommodating cavity opposite to the third opening is opened, and the accommodating cavity offset from the third opening is closed; the first opening and the second opening are offset in both the circumferential and radial directions of the box body, and the second opening and the third opening have overlapping portions in both the circumferential and radial directions of the box body; an inner cylinder is coaxially provided on the box body, one end of the inner cylinder is connected to the third opening, and the other end is connected to the exhaust port; a control component is provided inside the inner cylinder, which is used to open or close the inner cylinder. When the second actuating part is stationary, the control component closes the inner cylinder, isolating the third opening and the exhaust port; when the second actuating part is running, the control component opens the inner cylinder, connecting the third opening and the exhaust port.

[0014] Furthermore, the inner cylinder is provided with a fourth opening. The control components include a cover plate and an elastic element. The cover plate is slidably connected to the inner cylinder and the sliding direction is radial to the box body. When the cover plate slides relative to the inner cylinder, the cover plate can open or close the fourth opening. The elastic element is used to make the cover plate tend to close the fourth opening.

[0015] Furthermore, the other end of the second passage has multiple air holes, which are evenly distributed along the second direction and all face the inside of the transformer cabinet. The second direction is perpendicular to the first direction and parallel to the side wall of the transformer cabinet.

[0016] Furthermore, the orientation of the vents is set at an angle to the side wall of the transformer cabinet.

[0017] The present invention has at least the following beneficial effects:

[0018] When the temperature inside the transformer cabinet is less than or equal to the first threshold, the first actuating part remains stationary, and the air in the transformer cabinet, the first chamber, and the first passage flows freely and dissipates heat naturally through the first heat sink. When the temperature inside the transformer cabinet is greater than the first threshold, the first actuating part causes the air inside the transformer cabinet to flow through the first chamber to the first passage and dissipates heat through the first heat sink, thereby ensuring the airtightness of the transformer cabinet and preventing external dust and moisture from entering the transformer cabinet and adhering to the components and the surface of the transformer body, thus ensuring the electrical performance and long-term operational reliability of the equipment. Attached Figure Description

[0019] Figure 1 This is a schematic diagram of the structure of an intelligent solid-state transformer applied to a power system, provided in an embodiment of the present invention.

[0020] Figure 2 for Figure 1 Side view;

[0021] Figure 3 for Figure 2 Sectional view along axis AA;

[0022] Figure 4 for Figure 3 A magnified view of a section at point B in the middle;

[0023] Figure 5 for Figure 1 The front view;

[0024] Figure 6 for Figure 5 CC-direction sectional view;

[0025] Figure 7 for Figure 1 Exploded view of the parts;

[0026] Figure 8 This is a structural diagram of the first actuator, the second actuator, and the housing;

[0027] Figure 9 for Figure 8 A partial structural diagram;

[0028] Figure 10 for Figure 9 Exploded view of the parts;

[0029] Figure 11 This is a schematic diagram of the internal structure of the box;

[0030] Figure 12 This is a schematic diagram of the structure of the second action unit;

[0031] Figure 13 This is a structural schematic diagram of the transformer cabinet;

[0032] Figure 14 for Figure 13 DD section view;

[0033] Figure 15 for Figure 14 A magnified view of a section at point E in the middle.

[0034] in:

[0035] 100. Transformer cabinet; 101. Transformer body;

[0036] 201. First heat sink; 202. First passage; 203. First chamber; 204. First fan blade; 205. Motor; 206. Moving part; 207. Guide rod; 208. Guide groove; 209. Guide block; 210. Cam; 211. Impeller;

[0037] 301. Second heat sink; 302. Second passage; 303. Second chamber; 304. Air inlet; 305. Exhaust outlet; 306. Second fan blade; 307. Box body; 308. Receiving cavity; 309. First partition; 310. First opening; 311. Side ring; 312. Side hole; 313. Second opening; 314. Third opening; 315. Inner cylinder; 316. Second partition; 317. Top plate; 318. Through hole; 319. Outer cylinder; 320. Fourth opening; 321. Cover plate; 322. Elastic element; 323. Air hole. Detailed Implementation

[0038] To make the objectives, technical solutions, and advantages of this invention clearer, the invention will be further described in detail below through embodiments and in conjunction with the accompanying drawings. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.

[0039] The component designations used in this document, such as "first" and "second," are merely for distinguishing the described objects and do not have any sequential or technical meaning. The terms "connection" and "linkage" used in this invention, unless otherwise specified, include both direct and indirect connections (linkages). It should be understood that the terms "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," and "counterclockwise," indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings and are used only for the convenience of describing the invention and simplifying the description. They do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as limiting the invention.

[0040] In this invention, unless otherwise explicitly specified and limited, "above" or "below" the second feature can mean that the first feature is in direct contact with the second feature, or that the first feature is in indirect contact with the second feature through an intermediate medium. Furthermore, "above," "over," and "on top" of the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply that the first feature is at a lower horizontal level than the second feature.

[0041] like Figures 1 to 15 As shown, this embodiment of the invention provides an intelligent solid-state transformer for use in a power system, including a transformer body 101 and a transformer cabinet 100. The transformer cabinet 100 has multiple first heat sinks 201 on its exterior, each with a first passageway 202. The top of the transformer cabinet 100 has a first chamber 203 communicating with its interior. One end of the first passageway 202 communicates with the first chamber 203, and the other end communicates with the interior of the transformer cabinet 100. A first actuating part is provided within the first chamber 203, which allows air inside the transformer cabinet 100 to flow through the first chamber 203 to the first passageway 202. When the temperature inside the transformer cabinet 100 is less than or equal to a first threshold, the first actuating part remains stationary; when the temperature inside the transformer cabinet 100 is greater than the first threshold, the first actuating part operates.

[0042] When the temperature inside the transformer cabinet 100 is less than or equal to the first threshold, the first actuating unit remains stationary, and the air inside the transformer cabinet 100, the first chamber 203, and the first passage 202 flows freely and dissipates heat naturally through the first heat sink 201. When the temperature inside the transformer cabinet 100 is greater than the first threshold, the first actuating unit causes the air inside the transformer cabinet 100 to flow through the first chamber 203 to the first passage 202 and to be forcibly dissipated heat through the first heat sink 201, thereby ensuring the airtightness of the transformer cabinet 100 and preventing external dust and moisture from entering the transformer cabinet 100 and adhering to the components and the surface of the transformer body 101, thereby ensuring the electrical performance and long-term operational reliability of the equipment.

[0043] The transformer cabinet 100 also houses a power conversion unit, a control and drive unit, a power distribution protection unit, and auxiliary supporting units. The power conversion unit, including SiC / IGBT power modules, a high-frequency isolation transformer, and rectifier / inverter / DC-DC converter components, along with DC bus capacitors, buffer circuits, fuses, and other devices, is the core of the power conversion process, performing AC rectification, high-frequency isolation transformation, bidirectional AC / DC power conversion, and voltage stabilization. The control and drive unit, including a DSP+FPGA dual-core main controller, gate driver board, voltage / current sensors, and signal conditioning circuits, is the control center of the equipment, used for real-time acquisition of operating electrical parameters, generation of high-frequency PWM drive signals, execution of closed-loop control logic, and fault diagnosis. The power distribution protection unit includes high and low voltage circuit breakers, surge protectors, insulation monitoring devices, relay protection, and safety interlocking circuit devices, used to control equipment switching, provide overvoltage, overcurrent, short circuit, and lightning strike protection, and ensure the electrical safety of equipment and personnel. The auxiliary supporting units include an isolated auxiliary power supply, a communication module, a human-machine interface screen, and a heat dissipation system component. These components provide stable power to all modules in the cabinet, enabling local parameter setting, status monitoring, and remote communication, while also ensuring the heat dissipation requirements of the equipment. The structural composition and working principle of the aforementioned solid-state transformer are existing technologies and will not be elaborated upon here.

[0044] The transformer cabinet 100 has a door for easy inspection and maintenance. Multiple temperature sensors are installed inside the transformer cabinet 100 to detect temperature values ​​at different locations within the cabinet. When all temperature values ​​are less than or equal to a first threshold, the first actuating unit remains stationary. When the temperature value at any location exceeds the first threshold, the first actuating unit activates.

[0045] Additionally, see also Figure 3 , Figure 4 and Figure 8The first actuating unit includes two first blades 204 with opposite rotation directions. A motor 205 is mounted on the top of the transformer cabinet 100, equipped with a corresponding power supply and control module to control the start / stop, rotation direction, and speed of the motor 205 output. The output of the motor 205 is connected to the first blades 204 via a unidirectional structure, with the unidirectional structures of the two first blades 204 facing opposite directions. This unidirectional structure can be a ratchet or a unidirectional bearing structure, which are existing technologies and can be selected as needed. For example, when the output of motor 205 rotates forward, the upper first blade 204 rotates forward synchronously, while the lower first blade 204 remains stationary. The upper first blade 204 can guide the air inside the transformer cabinet 100 upward. When the output of motor 205 rotates in reverse, the upper first blade 204 remains stationary, while the lower first blade 204 rotates in reverse synchronously. The lower first blade 204 can also guide the air inside the transformer cabinet 100 upward. Thus, regardless of whether the output of motor 205 rotates forward or in reverse, the first actuating unit can guide the air inside the transformer cabinet 100 upward.

[0046] In one embodiment, multiple first heat sinks 201 are evenly distributed along a first direction, which is parallel to the side wall of the transformer cabinet 100. A movable member 206 is provided between two adjacent first heat sinks 201. A driving member is provided on the transformer cabinet 100, which is used to make the movable member 206 reciprocate between two adjacent first heat sinks 201. When the first actuating part is running, the driving member is running.

[0047] The movable component 206 moves back and forth between two adjacent first heat sinks 201, improving the airflow between the two adjacent first heat sinks 201 and improving the heat dissipation efficiency.

[0048] In this embodiment, the first direction is horizontal, the first heat sink 201 is a heat dissipation fin, and multiple first heat sinks 201 are arranged sequentially along the first direction. The first heat sinks 201 are arranged vertically, therefore the first passage 202 is also arranged vertically, with its upper end communicating with the first chamber 203 and its lower end communicating with the interior of the transformer cabinet 100. See also... Figure 1 and Figure 7The movable component 206 is plate-shaped and its size matches that of the first heat sink 201. Guide rods 207 are provided at both the top and bottom of adjacent first heat sinks 201, with the length direction of the guide rods 207 parallel to the first direction. Guide holes corresponding to the guide rods 207 are provided at both the top and bottom of the movable component 206 to guide the reciprocating movement of the movable component 206 between adjacent first heat sinks 201. Furthermore, guide grooves 208 are provided at both the top and bottom of the transformer cabinet 100, with the length direction of the guide grooves 208 parallel to the first direction. Guide blocks 209 corresponding to the guide grooves 208 are provided at both the top and bottom of the movable component 206 to improve the stability of the reciprocating movement of the movable component 206. In addition, the parts of the guide rod 207 that contact the guide hole, as well as the parts of the guide groove 208 and the guide block 209 that contact each other, are all smoothed. For example, they can be made of a material with low roughness, or be polished, or have rolling structures such as balls or rollers installed, thereby reducing the resistance when the moving part 206 moves back and forth.

[0049] In one embodiment, the driving component includes a plurality of cams 210 evenly distributed along a first direction, and the moving component 206 is located between two adjacent cams 210; an impeller 211 is rotatably provided in the first passage 202, and the impeller 211 is coaxially arranged with the cams 210. When air flows in the first passage 202, it can cause the impeller 211 to rotate, thereby driving the cams 210 to rotate, thereby driving the moving component 206 to reciprocate between two adjacent first heat sinks 201.

[0050] In one embodiment, all cams 210 are aligned in the circumferential direction so that all moving parts 206 reciprocate synchronously.

[0051] Of course, the circumferential orientation of all cams 210 can also be set randomly, so that the reciprocating movement of all moving parts 206 is random.

[0052] In one embodiment, a plurality of second heat sinks 301 are evenly distributed on the exterior of the transformer cabinet 100 along a first direction. A second passage 302 is formed within each second heat sink 301. The top of the transformer cabinet 100 also has a second chamber 303 communicating with its interior. A dehumidifier is provided in the second chamber 303. One end of the second passage 302 communicates with the second chamber 303, and the other end communicates with the interior of the transformer cabinet 100. The transformer cabinet 100 has an air inlet 304 and an air outlet 305. A second actuating part is provided within the second chamber 303, which is used to allow external air to pass through. Air enters the second chamber 303 and the second passage 302 through the air inlet 304 and the desiccant; when the temperature inside the transformer cabinet 100 is less than or equal to the first threshold, both the first and second operating parts are stationary; when the temperature inside the transformer cabinet 100 is greater than the first threshold and less than the second threshold, the first operating part operates, the second operating part is stationary, and the second threshold is greater than the first threshold; when the temperature inside the transformer cabinet 100 is greater than or equal to the second threshold, both the first and second operating parts operate, and the air inside the transformer cabinet 100 can be discharged through the exhaust port 305.

[0053] When the temperature inside the transformer cabinet 100 is greater than or equal to the second threshold, both the first and second operating units activate. The second operating unit allows outside air to pass through the air inlet 304 and desiccant. The desiccant removes moisture and enters the second chamber 303 and the second passage 302, then blows it into the transformer cabinet 100. Excess air inside the transformer cabinet 100 is discharged through the exhaust port 305. This process of introducing outside air to dissipate heat from the inside of the transformer cabinet 100 further improves heat dissipation efficiency. By setting a three-level heat dissipation mode, different heat dissipation modes can be matched to different temperatures, ensuring the heat dissipation effect inside the transformer cabinet 100, while also ensuring the airtightness of the transformer cabinet 100 to a certain extent, preventing dust and moisture from entering the inside of the transformer cabinet 100.

[0054] In addition, when the temperature inside the transformer cabinet 100 is less than or equal to the first threshold, the air in the transformer cabinet 100, the first chamber 203, the first passage 202 and the second passage 302 flows freely, thereby dissipating heat naturally through the first heat sink 201 and the second heat sink 301.

[0055] The second heat sink 301 is also a heat dissipation fin, and multiple second heat sinks 301 are arranged sequentially along the first direction. The second heat sinks 301 are arranged vertically, therefore the second passage 302 is also arranged vertically, with its upper end communicating with the second chamber 303 and its lower end communicating with the interior of the transformer cabinet 100. Furthermore, the second passage 302 avoids the first chamber 203; in other words, the second passage 302 is not connected to the first chamber 203. The air inlet 304 has a multi-mesh structure, thus filtering dust. The desiccant can be A / 4A type molecular sieve desiccant or montmorillonite (bentonite) desiccant, etc.

[0056] In addition, the second actuating unit includes a second fan blade 306. The output end of the motor 205 is also connected to the second fan blade 306 via a one-way structure, which can be a ratchet structure or a one-way bearing structure. When the output end of the motor 205 rotates forward, the second fan blade 306 remains stationary; when the output end of the motor 205 rotates in reverse, the second fan blade 306 rotates in reverse synchronously to guide the outside air downward.

[0057] In one embodiment, the dehumidifier has a waiting area and a used area. When the second actuating unit is running, outside air passes through the waiting area and the air inside the transformer cabinet 100 passes through the used area. A disc-shaped box 307 is rotatably disposed inside the second chamber 303. The box 307 divides the second chamber 303 and is used to hold the dehumidifier. Mesh holes communicating with the interior are opened around the box 307. When the second actuating unit is running, the box 307 rotates circumferentially to switch between the waiting area and the used area on the circumference of the box 307.

[0058] When the second operating unit is running, outside air passes through the area to be used, absorbing moisture from the outside air and transforming the area to be used into the area already in use. At the same time, the high-temperature dry air inside the transformer cabinet 100 passes through the area already in use, drying it and transforming it into the area to be used. The rotation of the housing 307 allows the area to be used and the area already in use to switch back and forth in the circumference of the housing 307, thereby recycling the desiccant inside the housing 307 and extending its service life.

[0059] In one embodiment, see [link to relevant documentation] Figure 11 The box 307 has multiple accommodating cavities 308 in its circumferential direction, each cavity 308 containing a desiccant; see [reference]. Figure 4 , Figure 8 and Figure 15The second chamber 303 is provided with a first partition 309, which has a first opening 310. The receiving cavity 308 opposite to the first opening 310 is opened, and the receiving cavity 308 offset from the first opening 310 is closed. The second chamber 303 is provided with a side ring 311, and the box body 307 is rotatably disposed within the side ring 311. The side ring 311 has a side hole 312, which opens the receiving cavity 308 opposite to the side hole 312, and closes the receiving cavity 308 offset from the side hole 312. The first chamber 203 and the second chamber 303... The first partition 309 has a second opening 313, and the receiving cavity 308 opposite to the second opening 313 is opened, while the receiving cavity 308 offset from the second opening 313 is closed. The first partition 309 also has a third opening 314, and the receiving cavity 308 opposite to the third opening 314 is opened, while the receiving cavity 308 offset from the third opening 314 is closed. The first opening 310 and the second opening 313 are offset in both the circumferential and radial directions of the box body 307, and the second opening 313 and the third opening 314 have overlapping portions in both the circumferential and radial directions of the box body 307.

[0060] An inner cylinder 315 is coaxially mounted on the box body 307. One end of the inner cylinder 315 is connected to the third opening 314, and the other end is connected to the exhaust port 305. A control component is provided inside the inner cylinder 315. The control component is used to open or close the inner cylinder 315. When the second actuating part is stationary, the control component closes the inner cylinder 315, isolating the third opening 314 and the exhaust port 305. When the second actuating part is running, the control component opens the inner cylinder 315, connecting the third opening 314 and the exhaust port 305.

[0061] When the second actuating unit is stationary, the housing 307 and inner cylinder 315 are stationary, the control unit closes the inner cylinder 315, and the third opening 314 and exhaust port 305 are isolated. Therefore, the air inside the transformer cabinet 100 can only flow through the first chamber 203 to the first passage 202, and is forcibly cooled by the first heat sink 201 and the second heat sink 301. When both the first and second actuating units are running, the housing 307 and inner cylinder 315 rotate, the control unit opens the inner cylinder 315, and connects the third opening 314 and exhaust port 305. At this time, the second actuating unit allows outside air to enter the upper part of the second chamber 303 through the air inlet 304, and enters the accommodating cavity 308 opposite it and located in the waiting area through the first opening 310. The air, after being dehumidified by the dehumidifier, enters the lower part of the second chamber 303 through the side hole 312, and enters the second passage 302, and is then blown into the transformer cabinet 100 to cool the inside of the transformer cabinet 100. At the same time, the first actuating part causes the air inside the transformer cabinet 100 to flow through the first chamber 203 to the first passage 202, and to be forcibly cooled by the first heat sink 201. The first actuating part also guides the excess air inside the transformer cabinet 100, so that the high-temperature dry air enters the accommodating cavity 308, which is opposite to it and located in the used area, through the second opening 313 to dry the used area, and then flows to the exhaust port 305 through the third opening 314 and is discharged.

[0062] Among them, see Figure 4 The housing 307 divides the second chamber 303 into upper and lower parts. In other words, after outside air enters the upper part of the second chamber 303, it can only enter the lower part of the second chamber 303 after passing through the housing 307 and the desiccant. (See also...) Figure 15 The first partition 309 and the side ring 311 are both fixed to the transformer cabinet 100, and the box 307 is rotatably disposed within the space enclosed by the first partition 309 and the side ring 311. (See also...) Figures 8 to 10 The housing 307 and the second fan blade 306 are coaxially arranged and rotate synchronously. Furthermore, the second fan blade 306 is fixed to the outside of the inner cylinder 315, and a second partition 316 is provided inside the inner cylinder 315. The output end of the motor 205 is connected to the second partition 316 via a one-way structure; therefore, when the output end of the motor 205 reverses, the second partition 316, the inner cylinder 315, the second fan blade 306, and the housing 307 reverse synchronously. The first opening 310, the second opening 313, and the third opening 314 can all be fan-shaped, and their circumferential dimensions match the circumferential dimensions of each receiving cavity 308. The circumferential and axial dimensions of the side hole 312 match the circumferential and axial dimensions of each receiving cavity 308. See also... Figure 15Two of each of the first opening 310, the second opening 313, the third opening 314, and the side hole 312 can be provided. For example, the two first openings 310 are evenly distributed around the circumference of the box body 307. In addition, in the radial direction, the first opening 310 is located on the outside of the inner cylinder 315, the second opening 313 has portions located on the outside and inside of the inner cylinder 315 respectively, and the third opening 314 is located on the inside of the inner cylinder 315.

[0063] Additionally, see also Figure 4 and Figure 15 The second chamber 303 is provided with a top plate 317 at the top, and a through hole 318 communicating with the exhaust port 305 is provided on the top plate 317. The bottom of the top plate 317 is provided with an outer cylinder 319, which is sleeved outside the inner cylinder 315 so that the air in the inner cylinder 315 can only be discharged through the through hole 318 and from the exhaust port 305.

[0064] In one embodiment, see [link to relevant documentation] Figure 12 The inner cylinder 315 is provided with a fourth opening 320. The control components include a cover plate 321 and an elastic member 322. The cover plate 321 is slidably connected to the inner cylinder 315 and the sliding direction is radial to the box body 307. When the cover plate 321 slides relative to the inner cylinder 315, the cover plate 321 can open or close the fourth opening 320. The elastic member 322 is used to make the cover plate 321 have a tendency to close the fourth opening 320.

[0065] When the box body 307 and the inner cylinder 315 are stationary, the elastic element 322 causes the cover plate 321 to close the fourth opening 320. When the box body 307 and the inner cylinder 315 rotate, under the action of centrifugal force, the elastic force of the elastic element 322 is overcome, and when the cover plate 321 slides relative to the inner cylinder 315, the cover plate 321 opens the fourth opening 320.

[0066] The fourth opening 320 is located on the second partition 316, and multiple sets of the fourth opening 320, cover plate 321, and elastic element 322 can be provided. The elastic element 322 can be a spring or a sheet. When the box body 307 and the inner cylinder 315 rotate, the centrifugal force generated is greater than the elastic force of the elastic element 322, thereby pushing the cover plate 321 to move and open the fourth opening 320.

[0067] In one embodiment, see [link to relevant documentation] Figure 3 , Figure 5 and Figure 14 The other end of the second passage 302 has multiple air holes 323. The multiple air holes 323 are evenly distributed along the second direction and all face the inside of the transformer cabinet 100. The second direction is perpendicular to the first direction and parallel to the side wall of the transformer cabinet 100, so that the outside air is evenly distributed inside the transformer cabinet 100, thereby improving the heat dissipation efficiency inside the transformer cabinet 100.

[0068] In this embodiment, the second direction is the vertical direction.

[0069] In one embodiment, the orientation of the vent 323 is set at an angle to the side wall of the transformer cabinet 100, so that outside air can be blown into the transformer cabinet 100 from the second passage 302 at a certain angle. When the air blows into the transformer cabinet 100, it generates a swirling flow, which improves the airflow in the transformer cabinet 100 and the uniformity of heat dissipation in the transformer cabinet 100, and avoids the occurrence of local temperature dead zones.

[0070] The working principle of this invention is as follows:

[0071] When the transformer body 101 is working, the temperature sensor detects the temperature values ​​at different locations inside the transformer cabinet 100. When all temperature values ​​are less than or equal to the first threshold, the first actuating part and the second actuating part are both stationary, and the air in the transformer cabinet 100, the first chamber 203, the first passage 202 and the second passage 302 flows freely, thereby dissipating heat naturally through the first heat sink 201 and the second heat sink 301.

[0072] When the temperature at a certain location inside the transformer cabinet 100 exceeds the first threshold, the first actuating unit operates, and the motor 205 drives one of the first fan blades 204 to rotate. The second actuating unit remains stationary, meaning the second fan blade 306, the housing 307, and the inner cylinder 315 are stationary. The elastic element 322 causes the cover plate 321 to close the fourth opening 320, isolating the third opening 314 and the exhaust port 305. Therefore, the air inside the transformer cabinet 100 flows through the first chamber 203 to the first passage 202 and is forcibly cooled by the first heat sink 201. At the same time, the air in the transformer cabinet 100 and the second passage 302 flows freely to dissipate heat naturally through the second heat sink 301, thereby ensuring the airtightness of the transformer cabinet 100 and preventing external dust and moisture from entering the transformer cabinet 100 and adhering to the components and the surface of the transformer body 101, thus ensuring the electrical performance and long-term operational reliability of the equipment. When the air inside the transformer cabinet 100 flows from the first chamber 203 to the first passage 202, the air drives the impeller 211 and cam 210 to rotate, thereby driving the moving part 206 to move back and forth between two adjacent first heat sinks 201, improving the airflow between the two adjacent first heat sinks 201 and improving the heat dissipation efficiency.

[0073] When the temperature value at a certain location inside the transformer cabinet 100 is greater than or equal to the second threshold, both the first and second operating units operate. The output end of the motor 205 drives the second fan blade 306, the housing 307, and the inner cylinder 315 to rotate. Outside air enters the upper part of the second chamber 303 through the air inlet 304 and enters the accommodating cavity 308, which is opposite to it and located in the area to be used, through the first opening 310. After the moisture in the air is removed by the desiccant, it enters the lower part of the second chamber 303 through the side hole 312 and enters the second passage 302, and is then blown into the inside of the transformer cabinet 100 to dissipate heat inside the transformer cabinet 100. Thus, by introducing outside air to dissipate heat inside the transformer cabinet 100, the heat dissipation efficiency is further improved. Furthermore, outside air can be blown into the transformer cabinet 100 from the second passage 302 at a certain angle, creating a swirling flow as the air enters the cabinet, improving airflow and heat dissipation uniformity within the cabinet, thus preventing localized temperature dead zones. Simultaneously, the output of the motor 205 drives another first fan blade 204 to rotate, causing air inside the transformer cabinet 100 to flow through the first chamber 203 into the first passage 202 and be forcibly cooled by the first heat sink 201. The rotation of the other first fan blade 204 also guides excess air inside the cabinet 100, directing this hot, dry air through the second opening 313 into the opposite, used area of ​​the receiving cavity 308, drying that area. Since the housing 307 is rotating, the area to be used and the used area switch circumferentially within the housing 307, thus recycling the desiccant and extending its service life. After passing through the dehumidifier, the air is discharged from the third opening 314. Since the inner cylinder 315 is also rotating, under the action of centrifugal force, it overcomes the elastic force of the elastic element 322, and the cover plate 321 slides relative to the inner cylinder 315. The cover plate 321 opens the fourth opening 320, and the air passes through the fourth opening 320 and the through hole 318 in sequence and is discharged from the exhaust port 305.

[0074] By setting a three-level heat dissipation mode, different heat dissipation modes can be matched to different temperatures, ensuring the heat dissipation effect inside the transformer cabinet 100, while also ensuring the airtightness of the transformer cabinet 100 to a certain extent, preventing dust and moisture from entering the transformer cabinet 100.

[0075] The technical features of the above embodiments can be combined in any way. For the sake of brevity, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0076] The embodiments described above are merely illustrative of several implementations of the present invention, and while the descriptions are specific and detailed, they should not be construed as limiting the scope of the invention. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of the present invention, and these modifications and improvements all fall within the scope of protection of the present invention. Therefore, the scope of protection of the present invention should be determined by the appended claims.

Claims

1. A smart solid-state transformer for use in power systems, characterized in that, The transformer includes a transformer body and a transformer cabinet. The transformer cabinet is provided with multiple first heat dissipation components on its exterior, and a first passage is formed within each first heat dissipation component. The top of the transformer cabinet has a first chamber that communicates with its interior. One end of the first passage is connected to the first chamber, and the other end is connected to the interior of the transformer cabinet. A first actuating part is provided in the first chamber. The first actuating part is used to allow air inside the transformer cabinet to flow through the first chamber to the first passage. When the temperature inside the transformer cabinet is less than or equal to a first threshold, the first actuating part is stationary. When the temperature inside the transformer cabinet is greater than the first threshold, the first actuating part is activated.

2. The intelligent solid-state transformer for power systems according to claim 1, characterized in that, Multiple first heat sinks are evenly distributed along a first direction, which is parallel to the side wall of the transformer cabinet. A movable part is provided between two adjacent first heat sinks. A driving part is provided on the transformer cabinet to make the movable part reciprocate between two adjacent first heat sinks. When the first actuating part is running, the driving part runs.

3. The intelligent solid-state transformer for power systems according to claim 2, characterized in that, The driving component includes a plurality of cams evenly distributed along a first direction, and a moving component is located between two adjacent cams; an impeller is rotatably provided in the first passage, and the impeller is coaxially arranged with the cams, so that the impeller can rotate when air flows in the first passage.

4. The intelligent solid-state transformer for power systems according to claim 3, characterized in that, All cams are aligned in the same circumferential direction.

5. The intelligent solid-state transformer applied to a power system according to any one of claims 1 to 4, characterized in that, Multiple second heat dissipation components are evenly distributed along a first direction on the exterior of the transformer cabinet. A second passage is formed within each second heat dissipation component. The top of the transformer cabinet also has a second chamber communicating with its interior. A dehumidifier is placed inside the second chamber. One end of the second passage is connected to the second chamber, and the other end is connected to the interior of the transformer cabinet. The transformer cabinet has an air inlet and an air outlet. A second actuating part is located within the second chamber, allowing outside air to enter the second chamber and the second passage through the air inlet and the dehumidifier. When the temperature inside the transformer cabinet is less than or equal to a first threshold, both the first and second actuating parts remain stationary. When the temperature inside the transformer cabinet is greater than the first threshold but less than the second threshold, the first actuating part operates, and the second actuating part remains stationary, with the second threshold greater than the first threshold. When the temperature inside the transformer cabinet is greater than or equal to the second threshold, both the first and second actuating parts operate, and air inside the transformer cabinet can be discharged through the air outlet.

6. The intelligent solid-state transformer for power systems according to claim 5, characterized in that, The desiccant has a waiting area and a used area. When the second actuating unit is running, outside air passes through the waiting area and air inside the transformer cabinet passes through the used area. A disc-shaped box is rotatably installed in the second chamber. The box divides the second chamber and is used to hold the desiccant. Mesh holes communicating with the interior are opened on all four sides of the box. When the second actuating unit is running, the box rotates around its circumference to switch between the waiting area and the used area around the circumference of the box.

7. The intelligent solid-state transformer for power systems according to claim 6, characterized in that, The box body has multiple circumferential cavities inside, each containing a desiccant. A second cavity has a first partition with a first opening; cavities opposite to the first opening are opened, while those offset from it are closed. A side ring is located within the second cavity, and the box body rotatably rests within it. Side holes are formed on the side ring; cavities opposite to these holes are opened, while those offset are closed. A second opening connects the first and second cavities; cavities opposite to this second opening are opened, while those offset are closed. A third opening is also provided on the first partition; cavities opposite to this third opening are opened, while those offset are closed. The first and second openings are offset both circumferentially and radially, and both overlap in both directions. An inner cylinder is coaxially mounted on the box body. One end of the inner cylinder is connected to the third opening, and the other end is connected to the exhaust port. A control component is installed inside the inner cylinder. The control component is used to open or close the inner cylinder. When the second actuating part is stationary, the control component closes the inner cylinder, isolating the third opening and the exhaust port. When the second actuating part is running, the control component opens the inner cylinder, connecting the third opening and the exhaust port.

8. The intelligent solid-state transformer for power systems according to claim 7, characterized in that, The inner cylinder has a fourth opening. The control components include a cover plate and an elastic element. The cover plate is slidably connected to the inner cylinder and the sliding direction is radial to the box body. When the cover plate slides relative to the inner cylinder, the cover plate can open or close the fourth opening. The elastic element is used to make the cover plate tend to close the fourth opening.

9. The intelligent solid-state transformer for power systems according to claim 5, characterized in that, The other end of the second passage has multiple air holes, which are evenly distributed along the second direction and all face the inside of the transformer cabinet. The second direction is perpendicular to the first direction and parallel to the side wall of the transformer cabinet.

10. The intelligent solid-state transformer for power systems according to claim 9, characterized in that, The air vents are oriented at an angle to the side wall of the transformer cabinet.

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