A mobile emergency modular substation

Abstract

The application discloses a movable emergency modular transformer substation, and relates to the technical field of transformer substations. The transformer substation comprises a shell, universal wheels, a voltage transformation mechanism and a temperature control mechanism. The voltage transformation mechanism and the shell are fixedly connected, the temperature control mechanism and the shell are fixedly connected, the temperature control mechanism and the voltage transformation mechanism are communicated, the shell and the universal wheels are fixedly connected, the universal wheels are located below the shell, and the temperature control mechanism is located on the periphery of the shell. The shell provides high-strength physical protection and support space for the whole device. The universal wheels located below the shell endow the transformer substation with flexible moving capability, so that the transformer substation can quickly respond to emergency demands. The voltage transformation mechanism is fixed in the shell to perform core voltage conversion operations. The temperature control mechanism located on the periphery of the shell and communicated with the voltage transformation mechanism can perform real-time thermal management on the internal environment of the shell, so that the voltage transformation mechanism can stably operate for a long time at a suitable temperature.

Description

Technical Field

[0001] This invention relates to the field of substation technology, specifically a mobile emergency modular substation. Background Technology

[0002] With the rapid development of the social economy and the continuous expansion of the power grid, the requirements for power supply reliability are increasing. In situations such as sudden natural disasters, major equipment failures, or peak power demand during large-scale events, how to quickly restore or supplement power supply becomes a critical issue. Mobile emergency modular substations, with their high mobility, flexible installation, and rapid response, have become important power facilities in the power emergency support system. They are widely used in disaster relief, temporary power supply, and power grid construction transition periods, and have broad application prospects and significant strategic importance in the modern power industry.

[0003] Existing substations typically use transformer oil as an insulation and cooling medium, and achieve natural cooling or simple forced air cooling through heat sinks outside the oil tank to dissipate the heat generated by the windings and core into the air in order to maintain the normal operating temperature of the equipment.

[0004] However, existing technologies have many shortcomings in practical applications. First, because emergency substations need to be moved frequently, the fixing methods for the iron core and windings often lack sufficient seismic resistance design. Long-distance transportation and bumps can easily cause internal components to loosen or shift, thus affecting equipment accuracy or even causing damage. Second, to meet the requirements of modular and compact design, the internal space of the equipment is limited. Existing winding structures are prone to large skin effects and eddy current losses, and often lack dedicated heat dissipation channels that penetrate deep into the windings, resulting in low heat dissipation efficiency under high load conditions and a tendency for localized overheating. In addition, traditional temperature control circulation systems usually have a relatively simple pipeline layout, lacking preheating and start-up functions for low-temperature environments and optimized designs that utilize physical properties to assist circulation. This leads to uneven distribution of the cooling medium flow field, low heat exchange efficiency, and difficulty in adapting to complex and changing emergency working environments. Therefore, those skilled in the art provide a mobile modular substation for emergency use to solve the problems mentioned above. Summary of the Invention

[0005] The purpose of this invention is to provide a mobile, modular emergency substation to solve the problems raised in the prior art.

[0006] To achieve the above objectives, the present invention provides the following technical solution: The substation includes a shell, casters, a power conversion mechanism, and a temperature control mechanism. The power conversion mechanism is fastened to the shell, the temperature control mechanism is fastened to the shell, and the temperature control mechanism is connected to the power conversion mechanism. The shell and the casters are fastened to each other. The casters are located below the shell, and the temperature control mechanism is located around the perimeter of the shell.

[0007] By adopting the above technical solutions, the shell provides high-strength physical protection and support space for the entire device. The casters located under the shell give the substation flexible mobility, enabling it to respond quickly to emergency needs. The transformer mechanism is fixed inside the shell to perform the core voltage conversion operation, while the temperature control mechanism located on the periphery of the shell and connected to the transformer mechanism can perform real-time thermal management of the internal environment of the shell, ensuring that the transformer mechanism operates stably for a long time at a suitable temperature.

[0008] Furthermore, the substation mechanism includes a laminated core, a high-voltage winding, a low-voltage winding, a low-voltage insulating cylinder, a high-voltage insulating cylinder, insulating paper, an upper clamp, a lower clamp, and a switching assembly. The laminated core and the upper clamp are fastened together, the laminated core and the lower clamp are fastened together, both the upper and lower clamps are fastened together to the housing, the insulating paper and the laminated core are fastened together, the low-voltage insulating cylinder and the laminated core are fastened together, the low-voltage winding and the low-voltage insulating cylinder are fastened together, the high-voltage insulating cylinder and the low-voltage insulating cylinder are fastened together, the high-voltage winding and the high-voltage insulating cylinder are fastened together, the switching assembly and the housing are fastened together, and the switching assembly and the high-voltage winding are electrically connected.

[0009] By adopting the above technical solution, the upper and lower clamps firmly hold and fix the laminated core inside the housing, forming a stable magnetic circuit skeleton for the substation; the insulating paper tightly wraps the laminated core to provide basic insulation, and the low-voltage insulating cylinder and the high-voltage insulating cylinder are sequentially sleeved on the outside of the laminated core, respectively supporting the low-voltage winding and the high-voltage winding, ensuring electrical isolation between windings and between windings and the iron core; the switching component is fixed on the housing and electrically connected to the high-voltage winding to adjust the input-output voltage ratio, thereby completing an efficient and safe substation process.

[0010] Furthermore, the laminated core is provided with an upper yoke, a core column, and a lower yoke. The low-voltage windings are all located around the core column, and the high-voltage windings are located around the low-voltage windings. The upper clamp is located at the upper yoke, and the lower clamp is located at the lower yoke. The laminated core includes silicon steel sheets and iron core binding straps. The iron core binding straps and silicon steel sheets are fastened together. Several silicon steel sheets are provided, and the surface of the silicon steel sheets is coated with an insulating layer.

[0011] By adopting the above technical solution, several silicon steel sheets with insulating coatings on their surfaces are tightly stacked by iron core straps, effectively reducing eddy current losses. The upper yoke, core column, and lower yoke formed by the stacked core construct a closed magnetic flux path. The low-voltage winding and high-voltage winding are concentrically sleeved around the core column in sequence to perform electromagnetic induction. With the upper clamp and lower clamp respectively held at the upper and lower yokes, the mechanical strength and stability of the overall structure of the stacked core under the action of electromagnetic force are guaranteed.

[0012] Furthermore, the high-voltage winding has a rectangular cross-section and is arranged in a continuous disc pattern from the inside to the outside. The high-voltage insulation cylinder is equipped with high-voltage interlayer pads, which are fastened to the high-voltage insulation cylinder. The high-voltage insulation cylinder is equipped with insulation pads, and the upper and lower clamps are fastened to the insulation pads. The high-voltage insulation cylinder is equipped with high-voltage support bars, and a high-voltage temperature control flow channel is provided between every two adjacent high-voltage support bars.

[0013] By adopting the above technical solution, the high-voltage winding with a rectangular cross-section is arranged in a continuous disc pattern from the inside to the outside, which improves the space utilization of the coil. The high-voltage interlayer pads on the high-voltage insulating cylinder ensure the insulation distance between the winding layers. The insulating pads serve as a buffer medium between the upper clamp, lower clamp and winding to prevent mechanical damage. While supporting the winding, the high-voltage support bars also allow the cooling medium to flow smoothly through the high-voltage temperature control channels formed between every two adjacent high-voltage support bars, thereby efficiently removing the heat generated by the high-voltage winding during operation.

[0014] Furthermore, the low-voltage winding is arranged in a double helix pattern, first spiraling from the bottom inside to the top and then spiraling from the top to the bottom. The low-voltage winding includes a low-voltage insulating sheath and transposed conductors, which are fastened together. There are several transposed conductors, which are periodically twisted and transposed. The low-voltage insulating cylinder is provided with low-voltage interlayer spacers, and the low-voltage winding and low-voltage interlayer spacers are fastened together. The low-voltage insulating cylinder is provided with low-voltage support bars, and a low-voltage temperature control flow channel is provided between every two adjacent low-voltage support bars.

[0015] By adopting the above technical solution, several transposed conductors are periodically twisted and transposed and wrapped with low-voltage insulation sheath. They are wound into low-voltage windings in a double-helix arrangement, which effectively counteracts the circulating current caused by leakage magnetic field and reduces skin effect and eddy current loss. The low-voltage interlayer pads on the low-voltage insulation cylinder ensure electrical clearance. The low-voltage support bars not only play a mechanical support role, but the low-voltage temperature control flow channel formed between every two adjacent low-voltage support bars promotes the flow of heat dissipation medium inside the low-voltage winding, ensuring thermal stability under high current conditions.

[0016] Furthermore, the switching components include a low-voltage lead bracket, a high-voltage lead bracket, a line selector, a low-voltage lead, a high-voltage lead, a low-voltage bushing, and a high-voltage bushing. The low-voltage lead bracket and the high-voltage lead bracket are both securely connected to the upper clamp, and the low-voltage lead bracket and the high-voltage lead bracket are both securely connected to the lower clamp. The line selector is securely connected to the housing, the low-voltage lead is securely connected to the low-voltage lead bracket, the high-voltage lead is securely connected to the high-voltage lead bracket, and the low-voltage bushing and the high-voltage bushing are both securely connected to the housing.

[0017] By adopting the above technical solution, the low-voltage lead bracket and the high-voltage lead bracket are firmly installed on the upper clamp and the lower clamp, respectively, providing reliable mechanical support for the low-voltage lead and the high-voltage lead and preventing loosening caused by vibration; the branch selector is fixed on the housing for easy operation, the low-voltage lead is connected to the low-voltage bushing, and the high-voltage lead is connected to the high-voltage bushing. With the arrangement of the low-voltage bushing and the high-voltage bushing on the housing, safe and orderly power transmission and switching control between the internal circuit of the substation and the external power grid is realized.

[0018] Furthermore, the high-voltage winding is equipped with a splitter line, which is located at different layers of the high-voltage winding. The high-voltage lead and the high-voltage bushing are electrically connected. The splitter selector and the splitter line are electrically connected. The splitter line and the high-voltage winding are electrically connected.

[0019] By adopting the above technical solution, the branch lines from different layers of the high-voltage winding are gathered and connected to the branch line selector. By operating the branch line selector, the position of the branch line connected to the circuit is changed, thereby adjusting the effective number of turns of the high-voltage winding to achieve voltage regulation. At the same time, the high-voltage winding maintains the electrical connection of the main circuit with the high-voltage bushing through the high-voltage lead, ensuring that the high-voltage electrical energy after transformation can still be stably output to the outside through the high-voltage bushing during the voltage regulation process.

[0020] Furthermore, the low-voltage lead and the low-voltage winding are electrically connected, and the low-voltage lead and the low-voltage bushing are electrically connected.

[0021] By adopting the above technical solution, the low-voltage lead directly connects the high-current output terminal of the low-voltage winding to the low-voltage bushing fixed on the housing with low impedance, thus constructing an efficient current transmission channel and safely and quickly transmitting the transformed low-voltage electrical energy to the external load terminal through the low-voltage bushing.

[0022] Furthermore, the temperature control mechanism includes a transformer oil tank, a circulating pump, a heating box, a cooling fan, cooling fins, a return pipe, and an inflow pipe. The transformer oil tank is securely connected to the housing, the transformer oil tank is connected to the circulating pump, the heating box is connected to the circulating pump, the cooling fan is securely connected to the housing, the cooling fins are securely connected to the return pipe, the return pipe is connected to the housing, the return pipe is connected to the transformer oil tank, the inflow pipe is connected to the heating box, and the inflow pipe is connected to the housing.

[0023] By adopting the above technical solution, the circulating pump drives the medium flow in the transformer oil tank. During low-temperature startup, the medium is heated by the heating box and then enters the shell preheating equipment through the inflow pipe. During normal operation, the medium that has absorbed heat flows out through the return pipe. The cooling fins that are tightly connected to the return pipe expand the heat dissipation area, and the cooling fan on the shell performs forced air cooling. Finally, it flows back to the transformer oil tank, forming a closed-loop temperature control system, which effectively ensures the thermal balance of the substation.

[0024] Furthermore, the return pipe is arranged in a serpentine pattern, with the return pipe located above the housing and the inflow pipe located below the housing.

[0025] By adopting the above technical solution, the inflow pipe is placed below the shell and the return pipe is placed above the shell. The physical property of hot oil rising naturally is used to assist circulation and reduce pumping resistance. The serpentine arrangement of the return pipe significantly increases the heat exchange surface area of ​​the pipeline in the air. Combined with the above layout, the flow field of the cooling medium in the shell is more uniform, which greatly improves the overall heat dissipation efficiency of the system.

[0026] Compared with the prior art, the beneficial effects of the present invention are: This invention uses upper and lower clamps to tightly hold and fix the upper and lower yokes of the laminated core within the housing, constructing a stable, earthquake-resistant magnetic circuit framework. The low-voltage and high-voltage windings are concentrically nested around the core column and supported and isolated by high- and low-voltage insulating cylinders. Based on this, the switching assembly mechanically fixes the leads using high-voltage and low-voltage lead supports, and establishes electrical connections with the branch lines of different layers of the high-voltage winding using a branch selector. This structural layout not only ensures the mechanical positioning accuracy of the internal components during the movement of the casters through rigid connections, but also allows adjustment of the effective number of turns in the high-voltage winding by changing the position of the branch lines connected to the circuit, thereby achieving precise regulation and conversion of the voltage at the emergency site. In terms of winding structure, the high-voltage winding adopts a rectangular cross-section, layer-by-layer continuous disc arrangement, improving space utilization; the low-voltage winding consists of several periodically twisted transposed conductors arranged in a double helix, effectively offsetting leakage magnetic field circulation and reducing the skin effect. The key lies in the support bars and interlayer spacers on the high and low voltage insulation cylinders. These components support the windings, while the dedicated temperature-controlled flow channels built between adjacent support bars allow the cooling medium to penetrate deep into the gaps inside the windings, solving the heat dissipation problem of the core heat-generating components in a compact modular structure. The temperature control mechanism adopts a unique pipeline layout, placing the inlet pipe below the shell and the serpentine return pipe with cooling fins above the shell. It utilizes the physical property of hot oil rising naturally to assist the circulation pump in reducing resistance, and the serpentine arrangement significantly increases the heat exchange area. Combined with the forced air cooling of the cooling fan and the preheating function of the heating box, the system achieves efficient circulation of the medium between the transformer tank and the shell through a closed-loop connection of the return pipe and the inlet pipe, ensuring that the device can maintain thermal balance under extreme low temperature start-up or high temperature and high load conditions. Attached Figure Description

[0027] Figure 1 This is a schematic diagram of the overall structure of the present invention; Figure 2 This is a schematic diagram of the substation structure of the present invention; Figure 3 This is a schematic diagram of the insulating paper structure of the present invention; Figure 4This is a schematic diagram of the stacked core structure of the present invention; Figure 5 This is a schematic diagram of the high-voltage winding structure of the present invention; Figure 6 This is a schematic diagram of the high-pressure temperature control flow channel structure of the present invention; Figure 7 This is a schematic diagram of the low-voltage winding structure of the present invention; Figure 8 This is a schematic diagram of the transposed conductor structure of the present invention; Figure 9 This is a schematic diagram of the low-lead structure of the present invention; Figure 10 This is a schematic diagram of the temperature control mechanism of the present invention.

[0028] In the diagram: 1. Shell; 2. Caster wheel; 3. Transformer mechanism; 31. Laminated core; 311. Upper yoke; 322. Core column; 323. Lower yoke; 324. Silicon steel sheet; 325. Core binding strap; 32. High-voltage winding; 33. Low-voltage winding; 331. Low-voltage insulation sheath; 332. Transposed conductor; 34. Low-voltage insulation cylinder; 341. Low-voltage interlayer spacer; 342. Low-voltage support bar; 343. Low-voltage temperature control channel; 35. High-voltage insulation cylinder; 351. High-voltage interlayer spacer; 352. Insulating spacer; 353. High-voltage... 354. Support bar; 36. High-voltage temperature control channel; 37. Insulating paper; 38. Upper clamp; 39. Lower clamp; 30. Switching assembly; 31. Low-voltage lead bracket; 32. High-voltage lead bracket; 33. Branch selector; 34. Low-voltage lead; 35. High-voltage lead; 36. Low-voltage bushing; 37. High-voltage bushing; 38. Branching wire; 49. Temperature control mechanism; 40. Transformer oil tank; 41. Circulating pump; 42. Heating box; 43. Cooling fan; 44. Cooling fins; 45. Return pipe; 46. Inflow pipe. Detailed Implementation

[0029] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0030] Please see Figure 1 - Figure 10 As shown, this invention provides a technical solution for a mobile emergency modular substation: The substation includes a shell 1, casters 2, a transformer mechanism 3, and a temperature control mechanism 4. The transformer mechanism 3 is fastened to the shell 1, the temperature control mechanism 4 is fastened to the shell 1, the temperature control mechanism 4 is connected to the transformer mechanism 3, the shell 1 is fastened to the casters 2, the casters 2 are located below the shell 1, and the temperature control mechanism 4 is located around the shell 1.

[0031] By adopting the above technical solution, the housing 1 provides high-strength physical protection and support space for the entire device. The casters 2 located below the housing 1 give the substation flexible mobility, enabling it to respond quickly to emergency needs. The transformer mechanism 3 is fixed inside the housing 1 to perform core voltage conversion operations. The temperature control mechanism 4 located on the periphery of the housing 1 and connected to the transformer mechanism 3 can perform real-time thermal management of the internal environment of the housing 1, ensuring that the transformer mechanism 3 operates stably for a long time at a suitable temperature.

[0032] Furthermore, the substation mechanism 3 includes a laminated core 31, a high-voltage winding 32, a low-voltage winding 33, a low-voltage insulating cylinder 34, a high-voltage insulating cylinder 35, insulating paper 36, an upper clamp 37, a lower clamp 38, and a switching assembly 39. The laminated core 31 and the upper clamp 37 are fastened together, the laminated core 31 and the lower clamp 38 are fastened together, and both the upper clamp 37 and the lower clamp 38 are fastened together to the housing 1. The insulating paper 36 and the laminated core 31 are fastened together, the low-voltage insulating cylinder 34 and the laminated core 31 are fastened together, the low-voltage winding 33 and the low-voltage insulating cylinder 34 are fastened together, the high-voltage insulating cylinder 35 and the low-voltage insulating cylinder 34 are fastened together, the high-voltage winding 32 and the high-voltage insulating cylinder 35 are fastened together, the switching assembly 39 and the housing 1 are fastened together, and the switching assembly 39 and the high-voltage winding 32 are electrically connected.

[0033] By adopting the above technical solution, the upper clamp 37 and the lower clamp 38 firmly clamp and fix the laminated core 31 inside the housing 1, forming a stable magnetic circuit skeleton for the substation; the insulating paper 36 tightly wraps the laminated core 31 to provide basic insulation, and the low-voltage insulating cylinder 34 and the high-voltage insulating cylinder 35 are sequentially sleeved on the outside of the laminated core 31, respectively supporting the low-voltage winding 33 and the high-voltage winding 32, ensuring electrical isolation between windings and between windings and the iron core; the switching component 39 is fixed on the housing 1 and electrically connected to the high-voltage winding 32 to adjust the input-output voltage ratio, thereby completing an efficient and safe substation process.

[0034] Furthermore, the laminated core 31 is provided with an upper yoke 311, a core column 322 and a lower yoke 323. The low-voltage windings 33 are all located around the core column 322, and the high-voltage windings 32 are located around the low-voltage windings 33. The upper clamp 37 is located at the upper yoke 311, and the lower clamp 38 is located at the lower yoke 323. The laminated core 31 includes silicon steel sheets 324 and iron core binding straps 325. The iron core binding straps 325 and silicon steel sheets 324 are fastened together. Several silicon steel sheets 324 are provided, and the surface of the silicon steel sheets 324 is coated with an insulating layer.

[0035] By adopting the above technical solution, several silicon steel sheets 324 with insulating layers on their surfaces are tightly stacked by iron core binding straps 325, which effectively reduces eddy current losses. The upper yoke 311, core column 322 and lower yoke 323 formed by the stacked core 31 construct a closed magnetic flux path. The low-voltage winding 33 and high-voltage winding 32 are concentrically sleeved around the core column 322 to perform electromagnetic induction. With the upper clamp 37 and lower clamp 38 respectively clamped at the upper yoke 311 and lower yoke 323, the mechanical strength and stability of the overall structure of the stacked core 31 under the action of electromagnetic force are guaranteed.

[0036] Furthermore, the high-voltage winding 32 has a rectangular cross-section and is arranged in a continuous disc-like pattern from the inside out. The high-voltage insulating cylinder 35 is provided with high-voltage interlayer spacers 351, which are fastened to the high-voltage insulating cylinder 35. The high-voltage insulating cylinder 35 is provided with insulating spacers 352, and the upper clamp 37 and the lower clamp 38 are fastened to the insulating spacers 352. The high-voltage insulating cylinder 35 is provided with high-voltage support bars 353, and a high-voltage temperature control channel 354 is provided between every two adjacent high-voltage support bars 353.

[0037] By adopting the above technical solution, the high-voltage winding 32 with a rectangular cross-section is arranged in a continuous disc pattern from the inside to the outside, which improves the space utilization of the coil. The high-voltage interlayer pads 351 on the high-voltage insulating cylinder 35 ensure the insulation distance between the winding layers. The insulating pads 352 serve as a buffer medium between the upper clamp 37, the lower clamp 38 and the winding to prevent mechanical damage. While supporting the winding, the high-voltage support bars 353 also allow the cooling medium to flow smoothly through the high-voltage temperature control channels 354 formed between every two adjacent high-voltage support bars 353, thereby efficiently removing the heat generated by the high-voltage winding 32 during operation.

[0038] Furthermore, the low-voltage winding 33 is arranged in a double helix pattern, spiraling from the bottom inner side to the top and then spiraling from the top to the bottom. The low-voltage winding 33 includes a low-voltage insulating outer sheath 331 and a transposition conductor 332. The low-voltage insulating outer sheath 331 and the transposition conductor 332 are fastened together. There are several transposition conductors 332, which are periodically twisted and transposed. The low-voltage insulating cylinder 34 is provided with a low-voltage interlayer pad 341. The low-voltage winding 33 and the low-voltage interlayer pad 341 are fastened together. The low-voltage insulating cylinder 34 is provided with a low-voltage support bar 342, and a low-voltage temperature control channel 343 is provided between every two adjacent low-voltage support bars 342.

[0039] By adopting the above technical solution, several transposed conductors 332 are periodically twisted and transposed and wrapped with low-voltage insulation sheath 331, and wound into low-voltage winding 33 in a double-helix arrangement, which effectively counteracts the circulating current caused by leakage magnetic field and reduces skin effect and eddy current loss; the low-voltage interlayer pads 341 on the low-voltage insulation cylinder 34 ensure electrical clearance, and the low-voltage support bars 342 not only play a mechanical support role, but the low-voltage temperature control flow channel 343 formed between every two adjacent low-voltage support bars 342 promotes the flow of heat dissipation medium inside the low-voltage winding 33, ensuring thermal stability under high current conditions.

[0040] Furthermore, the switching assembly 39 includes a low-voltage lead bracket 391, a high-voltage lead bracket 392, a line selector 393, a low-voltage lead 394, a high-voltage lead 395, a low-voltage bushing 396, and a high-voltage bushing 397. The low-voltage lead bracket 391 and the high-voltage lead bracket 392 are both fastened to the upper clamp 37, and the low-voltage lead bracket 391 and the high-voltage lead bracket 392 are both fastened to the lower clamp 38. The line selector 393 is fastened to the housing 1, the low-voltage lead 394 is fastened to the low-voltage lead bracket 391, the high-voltage lead 395 is fastened to the high-voltage lead bracket 392, and the low-voltage bushing 396 and the high-voltage bushing 397 are both fastened to the housing 1.

[0041] By adopting the above technical solution, the low-voltage lead bracket 391 and the high-voltage lead bracket 392 are stably installed on the upper clamp 37 and the lower clamp 38, respectively, providing reliable mechanical support for the low-voltage lead 394 and the high-voltage lead 395, preventing loosening caused by vibration; the branch selector 393 is fixed on the housing 1 for easy operation, the low-voltage lead 394 is connected to the low-voltage bushing 396, and the high-voltage lead 395 is connected to the high-voltage bushing 397. With the arrangement of the low-voltage bushing 396 and the high-voltage bushing 397 on the housing 1, safe and orderly power transmission and switching control between the internal circuit of the substation and the external power grid is realized.

[0042] Furthermore, the high-voltage winding 32 is equipped with a splitter 310, which is located at different layers of the high-voltage winding 32. The high-voltage lead 395 and the high-voltage bushing 397 are electrically connected. The splitter selector 393 is electrically connected to the splitter 310, the splitter 310 is electrically connected to the high-voltage winding 32, and the high-voltage lead 395 is electrically connected to the high-voltage winding 32.

[0043] By adopting the above technical solution, the branch lines 310 of different layers from the high-voltage winding 32 are gathered and connected to the branch line selector 393. By operating the branch line selector 393, the position of the branch line 310 connected to the circuit is changed, thereby adjusting the effective number of turns of the high-voltage winding 32 to achieve voltage regulation. At the same time, the high-voltage winding 32 maintains the electrical connection of the main circuit with the high-voltage bushing 397 through the high-voltage lead 395, ensuring that the high-voltage electrical energy after transformation can still be stably output to the outside through the high-voltage bushing 397 during the voltage regulation process.

[0044] Furthermore, the low-voltage lead 394 is electrically connected to the low-voltage winding 33, and the low-voltage lead 394 is electrically connected to the low-voltage bushing 396.

[0045] By adopting the above technical solution, the low-voltage lead 394 directly connects the high-current output terminal of the low-voltage winding 33 to the low-voltage bushing 396 fixed on the housing 1 with low impedance, thus constructing an efficient current transmission channel and safely and quickly transmitting the transformed low-voltage electrical energy to the external load terminal through the low-voltage bushing 396.

[0046] Furthermore, the temperature control mechanism 4 includes a transformer oil tank 41, a circulating pump 42, a heating box 43, a cooling fan 44, cooling fins 45, a return pipe 46, and an inflow pipe 47. The transformer oil tank 41 is fastened to the housing 1, the transformer oil tank 41 is connected to the circulating pump 42, the heating box 43 is connected to the circulating pump 42, the cooling fan 44 is fastened to the housing 1, the cooling fins 45 are fastened to the return pipe 46, the return pipe 46 is connected to the housing 1, the return pipe 46 is connected to the transformer oil tank 41, the inflow pipe 47 is connected to the heating box 43, and the inflow pipe 47 is connected to the housing 1.

[0047] By adopting the above technical solution, the circulating pump 42 drives the medium flow in the transformer oil tank 41. During low-temperature start-up, the medium is heated by the heating box 43 and then enters the preheating equipment of the shell 1 through the inflow pipe 47. During normal operation, the medium that has absorbed heat flows out through the return pipe 46. The cooling fins 45 that are fastened to the return pipe 46 are used to expand the heat dissipation area, and the cooling fan 44 on the shell 1 is used for forced air cooling. Finally, the medium flows back to the transformer oil tank 41, forming a closed-loop temperature control system, which effectively ensures the thermal balance of the substation.

[0048] Furthermore, the return pipe 46 is arranged in a serpentine pattern, with the return pipe 46 located above the housing 1 and the inflow pipe 47 located below the housing 1.

[0049] By adopting the above technical solution, the inflow pipe 47 is set below the shell 1 and the return pipe 46 is set above the shell 1. The physical property of hot oil rising naturally is used to assist circulation and reduce pumping resistance. The serpentine arrangement of the return pipe 46 significantly increases the heat exchange surface area of ​​the pipe in the air. Combined with the above layout, the flow field of the cooling medium in the shell 1 is more uniform, which greatly improves the overall heat dissipation efficiency of the system.

[0050] Working principle of the invention: This invention uses upper clamping member 37 and lower clamping member 38 to tightly clamp and fix the upper yoke 311 and lower yoke 323 of the laminated core 31 within the housing 1, constructing a stable anti-vibration magnetic circuit skeleton. The low-voltage winding 33 and high-voltage winding 32 are concentrically sleeved around the core column 322 and supported and isolated by high- and low-voltage insulating cylinders 34. Based on this, the switching assembly 39 mechanically fixes the leads through high-voltage lead bracket 392 and low-voltage lead bracket 391, and establishes an electrical connection with the branch lines 310 of different layers of the high-voltage winding 32 using a branch selector 393. This structural layout not only ensures the mechanical positioning accuracy of the internal components during the movement of the caster wheel 2 through rigid connections, but also allows adjustment of the effective number of turns of the high-voltage winding 32 by changing the position of the branch lines 310 connected to the circuit, thereby achieving precise adjustment and conversion of the voltage at the emergency site. In terms of winding structure, the high-voltage winding 32 adopts a layered continuous disc arrangement with a rectangular cross-section, which improves space utilization. The low-voltage winding 33 is arranged in a double helix by several periodically twisted transposed conductors 332, which effectively counteracts leakage magnetic field circulation and reduces skin effect. The key lies in the support bars and interlayer pads set on the high- and low-voltage insulating cylinders 34. While supporting the winding, these components, along with the dedicated temperature-controlled flow channels built between adjacent support bars, allow the cooling medium to penetrate deep into the gaps inside the winding, solving the heat dissipation problem of the core heat-generating components in the compact modular structure. The temperature control mechanism 4 adopts a unique pipeline layout, with the inflow pipe 47 located below the shell 1 and the serpentine return pipe 46 with cooling fins 45 located above the shell 1. The physical property of hot oil rising naturally assists the circulation pump 42 in reducing resistance, and the serpentine arrangement significantly increases the heat exchange area. With the forced air cooling of the cooling fan 44 and the preheating function of the heating box 43, the system achieves efficient circulation of the medium between the transformer oil tank 41 and the shell 1 through the closed-loop connection of the return pipe 46 and the inflow pipe 47, ensuring that the device can maintain thermal balance under extreme low temperature start-up or high temperature and high load conditions.

[0051] It will be apparent to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above, and that the invention can be implemented in other specific forms without departing from its spirit or essential characteristics. Therefore, the embodiments should be considered in all respects as exemplary and non-limiting, and the scope of the invention is defined by the appended claims rather than the foregoing description. Thus, all variations falling within the meaning and scope of equivalents of the claims are intended to be included within the present invention. No reference numerals in the claims should be construed as limiting the scope of the claims.

Claims

1. A mobile modular substation for emergency use, characterized in that: The substation includes a housing (1), casters (2), a transformer mechanism (3), and a temperature control mechanism (4). The transformer mechanism (3) is fastened to the housing (1), the temperature control mechanism (4) is fastened to the housing (1), the temperature control mechanism (4) is connected to the transformer mechanism (3), the housing (1) is fastened to the casters (2), the casters (2) are located below the housing (1), and the temperature control mechanism (4) is located around the housing (1). The transformer mechanism (3) includes a laminated core (31), a high-voltage winding (32), a low-voltage winding (33), a low-voltage insulating cylinder (34), a high-voltage insulating cylinder (35), insulating paper (36), an upper clamp (37), a lower clamp (38), and a switching assembly (39). The laminated core (31) and the upper clamp (37) are fastened together, and the laminated core (31) and the lower clamp (38) are fastened together. Both the upper clamp (37) and the lower clamp (38) are fastened together to the housing (1). The insulating paper (36) and the laminated core (31) are fastened together; the low-voltage insulating cylinder (34) and the laminated core (31) are fastened together; the low-voltage winding (33) and the low-voltage insulating cylinder (34) are fastened together; the high-voltage insulating cylinder (35) and the low-voltage insulating cylinder (34) are fastened together; the high-voltage winding (32) and the high-voltage insulating cylinder (35) are fastened together; the switching assembly (39) and the housing (1) are fastened together; and the switching assembly (39) and the high-voltage winding (32) are electrically connected. The switching assembly (39) includes a low-voltage lead bracket (391), a high-voltage lead bracket (392), a line selector (393), a low-voltage lead (394), a high-voltage lead (395), a low-voltage bushing (396), and a high-voltage bushing (397). The low-voltage lead bracket (391) and the high-voltage lead bracket (392) are both fastened to the upper clamp (37). The low-voltage lead bracket (391) and the high-voltage lead bracket (392) are both fastened to the lower clamp (38). The line selector (393) is fastened to the housing (1). The low-voltage lead (394) is fastened to the low-voltage lead bracket (391). The high-voltage lead (395) is fastened to the high-voltage lead bracket (392). The low-voltage bushing (396) and the high-voltage bushing (397) are both fastened to the housing (1). The high-voltage winding (32) is equipped with a splitting wire (310), which is located at different layers of the high-voltage winding (32). The high-voltage lead (395) and the high-voltage bushing (397) are electrically connected. The splitting selector (393) and the splitting wire (310) are electrically connected. The splitting wire (310) and the high-voltage winding (32) are electrically connected. The high-voltage lead (395) and the high-voltage winding (32) are electrically connected.

2. A mobile emergency modular substation according to claim 1, characterized in that: The laminated core (31) is provided with an upper yoke (311), a core column (322) and a lower yoke (323). The low-voltage windings (33) are all located around the core column (322), and the high-voltage windings (32) are located around the low-voltage windings (33). The upper clamp (37) is located at the upper yoke (311), and the lower clamp (38) is located at the lower yoke (323). The laminated core (31) includes silicon steel sheets (324) and iron core binding straps (325). The iron core binding straps (325) and silicon steel sheets (324) are fastened together. A plurality of silicon steel sheets (324) are provided, and the surface of the silicon steel sheets (324) is coated with an insulating layer.

3. A mobile emergency modular substation according to claim 2, characterized in that: The high-voltage winding (32) has a rectangular cross-section and is arranged in a continuous disc shape. The high-voltage insulating cylinder (35) is provided with a high-voltage interlayer pad (351). The high-voltage interlayer pad (351) and the high-voltage insulating cylinder (35) are fastened together. The high-voltage insulating cylinder (35) is provided with an insulating pad (352). The upper clamp (37) and the lower clamp (38) are both fastened together with the insulating pad (352). The high-voltage insulating cylinder (35) is provided with a high-voltage support bar (353). A high-voltage temperature control channel (354) is provided between every two adjacent high-voltage support bars (353).

4. A mobile emergency modular substation according to claim 3, characterized in that: The low-voltage winding (33) is arranged in a double helix. The low-voltage winding (33) includes a low-voltage insulating outer sheath (331) and a transposition conductor (332). The low-voltage insulating outer sheath (331) and the transposition conductor (332) are fastened together. There are a plurality of transposition conductors (332). The plurality of transposition conductors (332) are periodically twisted and transposed. The low-voltage insulating cylinder (34) is provided with a low-voltage interlayer pad (341). The low-voltage winding (33) and the low-voltage interlayer pad (341) are fastened together. The low-voltage insulating cylinder (34) is provided with a low-voltage support bar (342). A low-voltage temperature control channel (343) is provided between every two adjacent low-voltage support bars (342).

5. A mobile emergency modular substation according to claim 1, characterized in that: The low-voltage lead (394) is electrically connected to the low-voltage winding (33), and the low-voltage lead (394) is electrically connected to the low-voltage bushing (396).

6. A mobile emergency modular substation according to claim 5, characterized in that: The temperature control mechanism (4) includes a transformer oil tank (41), a circulating pump (42), a heating box (43), a cooling fan (44), cooling fins (45), a return pipe (46), and an inflow pipe (47). The transformer oil tank (41) is fastened to the shell (1). The transformer oil tank (41) is connected to the circulating pump (42). The heating box (43) is connected to the circulating pump (42). The cooling fan (44) is fastened to the shell (1). The cooling fins (45) are fastened to the return pipe (46). The return pipe (46) is connected to the shell (1). The return pipe (46) is connected to the transformer oil tank (41). The inflow pipe (47) is connected to the heating box (43). The inflow pipe (47) is connected to the shell (1).

7. A mobile emergency modular substation according to claim 6, characterized in that: The return pipe (46) is arranged in a serpentine pattern. The return pipe (46) is located above the housing (1), and the inflow pipe (47) is located below the housing (1).

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