Prefabricated transformer station

Abstract

The present disclosure provides a prefabricated transformer station, and relates to the field of transformer station technologies. The prefabricated transformer station includes a low-voltage chamber, a transformer chamber, and a medium-voltage chamber that are arranged sequentially in a length direction. An oil storage cabinet, a radiator, and a fan are included inside the transformer chamber. The oil storage cabinet is configured to accommodate an iron core and a coil of a transformer. The radiator includes a first oil tube and a second oil tube. The first oil tube and the second oil tube are arranged in a height direction, and both are in communication with an internal portion of the oil storage cabinet. The fan is arranged below or above the radiator. A top side of the transformer chamber is open. A side that is of the transformer chamber and that is opposite to the radiator and the fan is open in a width direction. Under the action of the fan, air flows from a side portion of the transformer chamber into the transformer chamber, then flows through the radiator and takes heat away from the radiator, and then flows out from the top side of the transformer chamber. The presence of the fan improves efficiency of heat exchange between the radiator and outside air, thereby improving heat dissipation efficiency of the prefabricated transformer station.

Description

TECHNICAL FIELD

[0001] The present disclosure relates to the field of transformer station technologies, and in particular, to a prefabricated transformer station.BACKGROUND

[0002] A prefabricated transformer station, also referred to as a box-type transformer station, includes a low-voltage chamber, a transformer chamber, and a medium-voltage chamber. A transformer in the transformer chamber can boost low-voltage electricity that is input from the low-voltage chamber and then output the electricity to a power grid through the medium-voltage chamber.

[0003] The transformer in operation generates a large amount of heat. In addition, with rapid development of new energy industries such as photovoltaic and energy storage industries, a capacity of a transformer has growing larger, leading to an increase in its power consumption. Therefore, heat dissipation efficiency of the prefabricated transformer station also needs to be improved.SUMMARY

[0004] The present disclosure provides a prefabricated transformer station. A fan is included inside a transformer chamber of the prefabricated transformer station. The fan drives air to flow through a radiator, improving efficiency of heat exchange between the radiator and outside air, thereby improving heat dissipation efficiency of the prefabricated transformer station. The prefabricated transformer station has the following technical solutions.

[0005] The present disclosure provides a prefabricated transformer station. The prefabricated transformer station includes a low-voltage chamber, a transformer chamber, and a medium-voltage chamber that are arranged sequentially in a length direction of the prefabricated transformer station. An oil storage cabinet, a radiator, and a fan are included inside the transformer chamber. The oil storage cabinet is configured to accommodate an iron core and a coil of a transformer. The radiator is arranged on a side of the oil storage cabinet in a width direction of the prefabricated transformer station. The radiator includes a first oil tube and a second oil tube. The first oil tube and the second oil tube are arranged in a height direction of the prefabricated transformer station, and both are in communication with an internal portion of the oil storage cabinet. The fan is arranged below the radiator and blows air upward. Alternatively, the fan is arranged above the radiator and draws air upward. A top side of the transformer chamber is open. A side portion that is of the transformer chamber and that is opposite to the radiator and the fan is open in the width direction.

[0006] The prefabricated transformer station may also be referred to as a box-type transformer station.

[0007] According to the technical solutions provided in the present disclosure, the fan is disposed below or above the radiator. In this case, the fan can drive air to flow through the radiator, and the air can take away heat dissipated by the radiator when flowing through the radiator. The presence of the fan improves efficiency of heat exchange between the radiator and outside air, thereby improving heat dissipation efficiency of the prefabricated transformer station. In addition, the improvement of the efficiency of heat exchange between the radiator and outside air can allow for higher heat dissipation efficiency of the radiator in a same volume, so that the volume of the radiator can be reduced. In this way, costs of the radiator are reduced. Moreover, a smaller volume of the radiator indicates a smaller possibility of leakage of cooling oil in the radiator during transportation of the prefabricated transformer station, improving reliability of the prefabricated transformer station.

[0008] In a possible implementation, the prefabricated transformer station further includes a supporting frame, and the supporting frame is fastened to a side wall of the oil storage cabinet or to a bottom wall of the transformer chamber. The fan is arranged below the radiator, and the supporting frame is arranged below the fan and supports the fan. The supporting frame serves to fasten the fan. In addition, the supporting frame arranged below the fan also provides air intake space with a stable height between a bottom portion of the fan and the bottom wall of the transformer chamber.

[0009] In a possible implementation, the supporting frame has a frame structure. In this way, an impact of the supporting frame on air absorption on a bottom side of the fan can be reduced.

[0010] In a possible implementation, a height of the supporting frame is greater than 300 mm. In this way, it can be ensured that there is sufficient space between the bottom portion of the fan and the bottom wall of the transformer chamber for air intake, air absorption, or air drawing.

[0011] In a possible implementation, an oil conservator is further included inside the transformer chamber, and the oil conservator is located above the oil storage cabinet and is in communication with the oil storage cabinet. The fan is arranged above the radiator, and the fan is arranged on a side of the oil conservator in the width direction. The oil conservator is configured to adjust a height of a liquid surface of the oil storage cabinet. When an oil temperature increases, cooling oil in the oil storage cabinet expands. In this case, excessive cooling oil flows into the oil conservator. Conversely, when the temperature decreases, the cooling oil in the oil conservator flows back into the oil storage cabinet.

[0012] According to the technical solutions provided in the present disclosure, the oil conservator occupies a portion of height space in the transformer chamber. In this case, when the fan is arranged on a side of the oil conservator, the height space of the oil conservator is reused for the arrangement of the fan, thereby eliminating the need to reduce a height of the radiator for the arrangement of the fan, or requiring only minimal reduction.

[0013] In a possible implementation, the prefabricated transformer station further includes a supporting frame, and the supporting frame is fastened to a side wall of the oil storage cabinet or to a top wall of the transformer chamber. The supporting frame includes a mounting hole, the mounting hole passes through the supporting frame in the height direction, and the fan is located in the mounting hole.

[0014] Because the mounting hole passes through the supporting frame in the height direction, the supporting frame does not affect upward air drawing by the fan. In addition, the fan is arranged in the mounting hole of the supporting frame instead of being arranged above the supporting frame. This reduces space occupied by the fan and the supporting frame in the height direction, and reduces an impact on the height of the radiator, so that the height of the radiator does not need to be reduced.

[0015] In a possible implementation, the prefabricated transformer station further includes a side door, and the side door is located on the open side portion of the transformer chamber and is configured to protect the open side portion, where the side door has a grid structure. In this way, the side door can protect components inside the transformer chamber, and the design of the grid structure can reduce an impact of the side door on air ventilation at the side portion of the transformer chamber. Maintenance personnel can enter the transformer chamber through the side door for maintenance.

[0016] In a possible implementation, the prefabricated transformer station further includes a cover, and the cover is located on the open top side of the transformer chamber and is configured to protect the open top side. The cover has a grid structure. In this way, the cover can protect components inside the transformer chamber, and the design of the grid structure can reduce an impact of the cover on air ventilation at the top side of the transformer chamber.

[0017] In a possible implementation, two columns of radiators and two columns of fans are included inside the transformer chamber. Each column of radiators includes a plurality of radiators, and each column of fans includes a plurality of fans. The two columns of radiators are arranged on both sides of the oil storage cabinet in the width direction. The two columns of fans are respectively arranged below or above the two columns of radiators. Two opposite sides of the transformer chamber are both open in the width direction. The arrangement of the two columns of radiators and the two columns of fans improves heat dissipation efficiency of the prefabricated transformer station.

[0018] In a possible implementation, a distance between a bottom portion of the radiator and the bottom wall of the transformer chamber is d1, and d1 is greater than 450 mm. The fan is arranged between the bottom portion of the radiator and the bottom wall of the transformer chamber. Through the setting of d1 to be greater than 450 mm, there is sufficient height space between the bottom portion of the radiator and the bottom wall of the transformer chamber for the arrangement of the fan.

[0019] In a possible implementation, the fan is arranged below the radiator. A distance between a bottom portion of the fan and the bottom wall of the transformer chamber is d3, and d3 is greater than 300 mm. In this way, there is sufficient space between the bottom portion of the fan and the bottom wall of the transformer chamber for air intake, air absorption, or air drawing.

[0020] In a possible implementation, a distance between the first oil tube and the second oil tube is d2, and d2 is less than 1700 mm. In other words, the height of the radiator is small, reducing a risk of oil leakage from the radiator. In addition, the presence of the fan allows the radiator with a small height to achieve high heat dissipation efficiency.BRIEF DESCRIPTION OF DRAWINGS

[0021] FIG. 1 is a diagram of an appearance of a prefabricated transformer station according to an embodiment of the present disclosure; FIG. 2 is a diagram of a prefabricated transformer station after a side door and a cover are hidden according to an embodiment of the present disclosure; FIG. 3 is a diagram of components inside a transformer chamber according to an embodiment of the present disclosure; FIG. 4 is a diagram of a view of components inside a transformer chamber in a length direction according to an embodiment of the present disclosure; FIG. 5 is a diagram of a flow path of air in a prefabricated transformer station according to an embodiment of the present disclosure; FIG. 6 is a diagram of a view of a prefabricated transformer station in a width direction according to an embodiment of the present disclosure; FIG. 7 is a diagram of another prefabricated transformer station after a side door and a cover are hidden according to an embodiment of the present disclosure; FIG. 8 is a diagram of components inside another transformer chamber according to an embodiment of the present disclosure; FIG. 9 is a diagram of a view of components inside another transformer chamber in a length direction according to an embodiment of the present disclosure; and FIG. 10 is a diagram of a column of fans according to an embodiment of the present disclosure.

[0022] Reference numerals 1: low-voltage chamber; 2: transformer chamber, 21: oil storage cabinet, 22: radiator, 221: first oil tube, 222: second oil tube, 223: heat dissipation fin, 23: fan, 24: side door, 25: cover, 26: supporting frame, 260: mounting hole, 27: oil conservator, 201: first air vent, 202: second air vent; 3: medium-voltage chamber. DESCRIPTION OF EMBODIMENTS

[0023] A main function of a prefabricated transformer station is to collect multipath low-voltage alternating currents generated by an inverter or a power conversion system (PCS), boost a collected alternating current to a rated voltage through a transformer, and then connect the alternating current to a power grid.

[0024] The prefabricated transformer station may also be referred to as a box-type transformer station. The prefabricated transformer station includes a container. The container includes a low-voltage chamber, a transformer chamber, and a medium-voltage chamber. The low-voltage chamber, also referred to as a low-voltage component chamber, mainly includes a low-voltage cabinet and a secondary loop cable, and has a main function of collecting multipath low-voltage currents generated by the inverter or the power conversion system and sending a collected current to a low-voltage side of the transformer for voltage boosting. The transformer chamber mainly includes a power transformer (transformer for short). The transformer is configured to perform voltage transformation, boost the current on the low-voltage side to a rated voltage, and output the current to the medium-voltage chamber. The medium-voltage chamber, also referred to as a medium-voltage component chamber, mainly includes a ring main unit, a medium-voltage bushing, and a medium-voltage cable. The medium-voltage chamber is configured to connect, to the power grid, the current that is output by the transformer. A voltage corresponding to the medium-voltage chamber is higher than a voltage corresponding to the low-voltage chamber. In this case, the medium-voltage chamber may also be referred to as a high-voltage chamber.

[0025] The prefabricated transformer station can be directly connected and used after being transported to a site. Therefore, the prefabricated transformer station has advantages such as easy mounting, flexible arrangement, a short construction period, and easy mobility. With rapid development of new energy industries such as photovoltaic and energy storage industries, the prefabricated transformer station is widely used in the new energy industries.

[0026] The transformer generates a large amount of heat when the prefabricated transformer station is in operation. In addition, as capacities of the inverter (for example, a photovoltaic inverter) and the power conversion system increase, a capacity of the transformer also needs to be correspondingly increased, resulting in increasingly high power consumption of the transformer. Heat dissipation power required by the prefabricated transformer station is also increasingly high.

[0027] In view of the foregoing technical problem, embodiments of the present disclosure provide a prefabricated transformer station. FIG. 1 is a diagram of an appearance of a prefabricated transformer station. As shown in FIG. 1, the prefabricated transformer station includes a low-voltage chamber 1, a transformer chamber 2, and a medium-voltage chamber 3 that are arranged sequentially in a length direction X of the prefabricated transformer station.

[0028] FIG. 2 is a diagram of the prefabricated transformer station after a side door 24 and a cover 25 are hidden. FIG. 3 is a diagram of components inside the transformer chamber 2. As shown in FIG. 2 and FIG. 3, an oil storage cabinet 21 and a radiator 22 are included inside the transformer chamber 2. The oil storage cabinet 21 is configured to accommodate an internal component of a transformer, such as an iron core and a coil. The oil storage cabinet 21 has cooling oil (mineral oil, natural ester, or synthetic ester) inside. The iron core and the coil of the transformer are immersed in the cooling oil, so that heat dissipated from the transformer can be transferred to the cooling oil. The radiator 22 is arranged on a side of the oil storage cabinet 21 in a width direction Y of the prefabricated transformer station. The radiator 22 includes a first oil tube 221 and a second oil tube 222. The first oil tube 221 and the second oil tube 222 are arranged in a height direction Z of the prefabricated transformer station, and both are in communication with an internal portion of the oil storage cabinet 21. A top side of the transformer chamber 2 is open (or unclosed), and a side portion that is of the transformer chamber 2 and that is opposite to the radiator 22 and a fan 23 is open (unclosed) in the width direction Y. In this way, the transformer chamber 2 exchanges air between the inside and the outside.

[0029] An internal liquid circulating cooling system is formed inside the oil storage cabinet 21 and the radiator 22. Small arrows in FIG. 4 show a flow path of the cooling oil in the oil storage cabinet 21 and the radiator 22. As shown in FIG. 4, based on a temperature difference, the cooling oil at a bottom portion of the oil storage cabinet 21 moves toward the top of the oil storage cabinet 21, then flows through the first oil tube 221 into the radiator 22, and then flows through the second oil tube 222 back to the bottom portion of the oil storage cabinet 21. When the cooling oil flows through the radiator 22, the cooling oil exchanges heat with outside air through the radiator 22, cooling down the cooling oil.

[0030] In addition, as shown in FIG. 2 to FIG. 4, an oil conservator 27 is further included inside the transformer chamber 2, and the oil conservator 27 is located on a top portion of the oil storage cabinet 21 and is in communication with the oil storage cabinet 21. The oil conservator 27 is configured to adjust a height of a liquid surface of the oil storage cabinet 21. When an oil temperature increases, cooling oil in the oil storage cabinet 21 expands. In this case, excessive cooling oil flows into the oil conservator 27. Conversely, when the temperature decreases, the cooling oil in the oil conservator 27 flows back into the oil storage cabinet 21.

[0031] As shown in FIG. 2 to FIG. 4, a fan 23 is further included inside the transformer chamber 2, and the fan 23 is arranged below the radiator 22 and blows air upward. Big arrows in FIG. 4 and FIG. 5 show flow paths of air blown by the fan 23. As shown in FIG. 4 and FIG. 5, the fan 23 absorbs air from a bottom portion through the open side portion of the transformer chamber 2, and blows the air upward. The air flows through the radiator 22 and is then blown out from the open top side of the transformer chamber 2. The air takes away heat dissipated by the radiator 22 when the air flows through the radiator 22.

[0032] According to the technical solutions provided in embodiments of the present disclosure, the arrangement of the fan 23 improves efficiency of heat exchange between the radiator 22 and outside air. The improvement of efficiency of heat exchange helps improve a heat dissipation capability of the prefabricated transformer station, so that the heat dissipation capability of the prefabricated transformer station can match a capacity of the transformer, and also allows the radiator 22 to have a large heat dissipation capability without having an excessively large volume, facilitating miniaturization of the radiator 22. A smaller radiator 22 indicates a smaller possibility of oil leakage from the radiator 22 during transportation of the prefabricated transformer station. This improves reliability of the prefabricated transformer station during transportation.

[0033] A system in which the fan 23 drives air to flow through the radiator 22 and dissipates heat from the radiator 22 may also be referred to as an external ventilative cooling system of the prefabricated transformer station. The external ventilative cooling system and the internal liquid circulating cooling system of the prefabricated transformer station together form a transformer cooling system of the prefabricated transformer station.

[0034] In some examples, as shown in FIG. 3 and FIG. 4, the radiator 22 includes a plurality of heat dissipation fins 223, and the plurality of heat dissipation fins 223 are arranged at intervals in the width direction Y. A flow channel is included inside the heat dissipation fin 223. A top end of the heat dissipation fin 223 is in communication with the first oil tube 221, and a bottom end of the heat dissipation fin 223 is in communication with the second oil tube 222. The cooling oil in the oil storage cabinet 21 flows through the first oil tube 221 into the radiator 22. The cooling oil in the first oil tube 221 flows downward through the plurality of heat dissipation fins 223 respectively, and flows through the second oil tube 222 back into the oil storage cabinet 21. There is a gap between two adjacent heat dissipation fins 223. The gap forms an air channel for air blown out by the fan 23 to flow. In this way, a contact area between the radiator 22 and outside air is increased, and efficiency of heat exchange between the radiator 22 and outside air is also improved. The fan 23 is opposite to air channels formed between the plurality of heat dissipation fins 223.

[0035] In some examples, as shown in FIG. 2 to FIG. 4, two columns of radiators 22 and two columns of fans 23 are included inside the transformer chamber 2. Each column of radiators 22 includes a plurality of radiators 22, and each column of fans 23 includes a plurality of fans 23. The two columns of radiators 22 are arranged on both sides of the oil storage cabinet 21 in the width direction Y. The two columns of fans 23 are respectively arranged below the two columns of radiators 22. Two opposite sides of the transformer chamber 2 are both open in the width direction Y.

[0036] The design of the two columns of radiators 22 and the two columns of fans 23 can increase a heat dissipation area of the prefabricated transformer station, thereby improving heat dissipation efficiency of the prefabricated transformer station.

[0037] Certainly, in some other examples, only one column of radiators 22 and one column of fans 23 may be included inside the transformer chamber 2. This is not limited in embodiments of the present disclosure.

[0038] It needs to be noted that a quantity of the radiators 22 is not limited in embodiments of the present disclosure. In some examples, each column of radiators 22 includes two to six radiators 22. Quantities of radiators 22 included in two columns of radiators 22 may be the same or may be different. A quantity of the fans 23 is not limited in embodiments of the present disclosure. In some examples, each column of fans 23 includes two to six fans 23. Quantities of two columns of fans 23 may be the same or may be different. A quantity of the fans 23 may be the same as or different from a quantity of the radiators 22. In some examples, as shown in FIG. 3, a quantity of the fans 23 is the same as a quantity of the radiators 22, and the plurality of fans 23 are in a one-to-one correspondence with the plurality of radiators 22.

[0039] It needs to be noted that, that one side or two sides of the transformer chamber 2 are open in the width direction Y may also be understood as that one side or two sides of the transformer chamber 2 in the width direction Y include a first air vent 201. As shown in FIG. 6, each first air vent 201 is opposite to all radiators 22 of a corresponding column of radiators 22 and to all fans 23 of a corresponding column of fans 23. A large first air vent 201 improves air ventilation effect of the transformer chamber 2, improving heat dissipation efficiency of the prefabricated transformer station.

[0040] In some examples, as shown in FIG. 6, in the width direction Y, projections of all radiators 22 of each column of radiators 22 and all fans 23 of each column of fans 23 are within a projection range of the first air vent 201.

[0041] In some examples, as shown in FIG. 1, the prefabricated transformer station further includes a side door 24, and the side door 24 is located on the open side portion of the transformer chamber 2 and is configured to protect the open side portion. The side door 24 has a grid structure. The side door 24 can protect components inside the transformer chamber 2, and the design of the grid structure can reduce an impact of the side door 24 on air ventilation at the side portion of the transformer chamber. In addition, maintenance personnel can enter the transformer chamber 2 through the side door 24 for maintenance. For example, as shown in FIG. 1, the side door 24 is double doors.

[0042] Certainly, in some other examples, as shown in FIG. 2 or FIG. 5, the prefabricated transformer station may alternatively not include the side door 24. In this way, air ventilation effect of the side portion of the transformer chamber can be improved.

[0043] That the top side of the transformer chamber 2 is open may also be understood as that the top side of the transformer chamber 2 includes a second air vent 202. As shown in FIG. 5, the second air vent 202 is opposite to the oil storage cabinet 21 and all radiators 22 of two columns of radiators 22. A large second air vent 202 improves air ventilation effect of the transformer chamber 2, improving heat dissipation efficiency of the prefabricated transformer station.

[0044] In some examples, as shown in FIG. 1, the prefabricated transformer station further includes a cover 25, and the cover 25 is located on the open top side of the transformer chamber 2 and is configured to protect the open top side. The cover 25 has a grid structure. The cover 25 can protect components inside the transformer chamber 2, and the design of the grid structure can reduce an impact of the cover 25 on air ventilation at the top portion of the transformer chamber 2.

[0045] Certainly, in some other examples, as shown in FIG. 2 or FIG. 5, the prefabricated transformer station may alternatively not include the cover 25. In this way, air ventilation effect of the top portion of the transformer chamber 2 can be improved.

[0046] Because the fan 23 is arranged below the radiator 22, sufficient height space needs to be reserved between the bottom portion of the radiator 22 and the bottom wall of the transformer chamber 2 for the arrangement of the fan 23, and sufficient air intake space needs to be reserved between the fan 23 and the bottom wall of the transformer chamber 2. FIG. 6 is a diagram of a view of the prefabricated transformer station in the width direction Y. In some examples, as shown in FIG. 6, a distance between a bottom portion of the radiator 22 and the bottom wall of the transformer chamber 2 is d1, and d1 is greater than 450 mm. It may be understood that d1 should not be excessively large. Excessively large d1 leads to an excessively small height of the radiator 22 and an excessively small heat dissipation area of the radiator 22. Therefore, in some examples, d1 is less than 1150 mm.

[0047] In addition, the arrangement of the fan 23 improves efficiency of heat exchange between the radiator 22 and outside air, so that the radiator 22 can have high heat dissipation efficiency without having an excessively large height. In some examples, as shown in FIG. 6, a distance between the first oil tube 221 and the second oil tube 222 is d2, and d2 is less than 1700 mm. In this way, a risk of oil leakage from the radiator 22 during transportation of the prefabricated transformer station can be reduced. Herein, d2 should not be excessively small. Excessively small d2 leads to an excessively small heat dissipation area. For example, d2 is greater than 1000 mm. Herein, d2 may be understood as a maximum distance between the first oil tube 221 and the second oil tube 222.

[0048] In some examples, as shown in FIG. 6, a distance between a bottom portion of the fan 23 and the bottom wall of the transformer chamber 2 is d3, and d3 is greater than 300 mm. In this way, there is sufficient space between the bottom portion of the fan 23 and the bottom wall of the transformer chamber 2 for air intake, avoiding coverage on an air intake side of the fan 23 by the bottom wall of the transformer chamber 2, and ensuring a sufficient volume of air from the fan 23.

[0049] To facilitate mounting of the fan 23, in some examples, as shown in FIG. 2 to FIG. 5, the prefabricated transformer station further includes a supporting frame 26, and the supporting frame 26 is fastened to a side wall of the oil storage cabinet 21 or to a bottom wall of the transformer chamber 2. The supporting frame 26 is arranged below the fan 23 and supports the fan 23. The supporting frame 26 serves to fasten the fan 23. In addition, the supporting frame 26 arranged below the fan 23 also provides air intake space with a stable height between a bottom portion of the fan 23 and the bottom wall of the transformer chamber 2.

[0050] In some examples, as shown in FIG. 2 to FIG. 5, the prefabricated transformer station includes a plurality of supporting frames 26, and each supporting frame 26 is configured to support a fan 23.

[0051] In some examples, as shown in FIG. 2 to FIG. 5, the supporting frame 26 has a frame structure. Therefore, an impact of the supporting frame 26 on air absorption on a bottom side of the fan 23 can be reduced. For example, as shown in FIG. 2 to FIG. 5, the supporting frame 26 is formed by connecting a plurality of supporting beams and supporting columns. In this way, air can pass through each surface of the supporting frame 26 to enter the fan 23.

[0052] In some examples, as shown in FIG. 2 to FIG. 5, a height of the supporting frame 26 is greater than 300 mm, to ensure that there is sufficient space between the bottom portion of the fan 23 and the bottom wall of the transformer chamber 2 for air intake.

[0053] In addition to the foregoing technical solution in which the fan 23 is arranged below the radiator 22, in some other examples, the fan 23 may alternatively be arranged above the radiator 22, and the fan 23 draws air upward. FIG. 7 is a diagram of a prefabricated transformer station in which the fan 23 is arranged above the radiator 22. FIG. 8 is a diagram of components inside the transformer chamber 2. FIG. 9 is a diagram of a view of components inside the transformer chamber 2 in the length direction X.

[0054] In some examples, as shown in FIG. 7 to FIG. 9, the fan 23 is arranged above the radiator 22, and the fan 23 is arranged on a side of the oil conservator 27 in the width direction Y. In some examples, as shown in FIG. 7 to FIG. 9, two columns of fans 23 are arranged on both sides of the oil conservator 27 in the width direction Y.

[0055] The oil conservator 27 occupies a portion of height space in the transformer chamber 2. In this case, when the fan 23 is arranged on a side of the oil conservator 27, the height space of the oil conservator 27 is reused for the arrangement of the fan 23, thereby eliminating the need to reduce a height of the radiator 22 for the arrangement of the fan 23, or requiring only minimal reduction. In addition, because the bottom side of the fan 23 is opposite to air channels between a plurality of heat dissipation fins 223 of the radiator 22, a distance between the bottom side of the fan 23 and the radiator 22 does not need to be excessively large to absorb air. Therefore, this eliminates the need to reduce a height of the radiator 22 for the arrangement of the fan 23, or requires only minimal reduction. In this way, the prefabricated transformer station can achieve a higher heat dissipation capability. This helps provide a transformer with a larger capacity for the prefabricated transformer station.

[0056] Certainly, in a case that a heat dissipation requirement is met, a user may choose to reduce the height of the radiator 22, to reduce a risk of oil leakage from the radiator 22 during transportation of the prefabricated transformer station. For related parameters such as the height of the radiator 22 (that is, the distance d2 between the first oil tube 221 and the second oil tube 222), and the distance d1 between the bottom portion of the radiator 22 and the bottom wall of the transformer chamber 2, refer to the foregoing content. Details are not described herein again.

[0057] In some examples, as shown in FIG. 8, the prefabricated transformer station further includes a supporting frame 26, and the supporting frame 26 is fastened to a side wall of the oil storage cabinet 21 or to a top wall of the transformer chamber 2, and supports the fan 23. For example, the supporting frame 26 is arranged on a side of the oil conservator 27 in the width direction Y.

[0058] FIG. 10 is a diagram of the supporting frame 26 and the fan 23. In some examples, as shown in FIG. 10, the supporting frame 26 includes a mounting hole 260, the mounting hole 260 passes through the supporting frame 26 in the height direction Z, and the fan 23 is located in the mounting hole 260. Because the mounting hole 260 passes through the supporting frame 26 in the height direction Z, the supporting frame 26 does not affect upward air drawing by the fan 23. In addition, the fan 23 is disposed in the mounting hole 260 of the supporting frame 26 instead of being disposed above the supporting frame 26. This reduces space occupied by the fan 23 and the supporting frame 26 in the height direction Z, and reduces an impact on the height of the radiator 22, so that the height of the radiator 22 does not need to be reduced.

[0059] In some examples, as shown in FIG. 8, the prefabricated transformer station includes two supporting frames 26. The two supporting frames 26 are arranged on both sides of the oil conservator 27 in the width direction Y As shown in FIG. 10, each supporting frame 26 includes a plurality of mounting holes 260, and each fan 23 is located in a mounting hole 260.

[0060] Terms used in implementations of the present disclosure are merely used to explain embodiments of the present disclosure, but are not intended to limit the present disclosure. Unless otherwise defined, technical terms or scientific terms used in implementations of the present disclosure should have the common meanings understood by a person of ordinary skill in the art to which the present disclosure pertains. The terms "first", "second", and the like used in the specification and claims of the present disclosure do not indicate any order, quantity, or importance, but are merely intended to distinguish between different components. Likewise, "a / an", "one", or the like is not intended to indicate a quantity limitation either, but is intended to indicate existing at least one. Words such as "include" and "comprise" mean that an element or object before the "include" or "comprise" encompasses elements or objects and their equivalents listed after the "include" or "comprise", and other elements or objects are not excluded. "Upper", "lower", "left", "right", or the like is only used to indicate a relative position relationship. When an absolute position of a described object is changed, the relative position relationship may also change correspondingly. "A plurality of" means two or more, unless otherwise expressly limited.

[0061] The foregoing descriptions are merely optional embodiments of the present disclosure, but are not intended to limit the present disclosure. Any modification, equivalent replacement, improvement, or the like made within the principle of the present disclosure shall fall within the protection scope of the present disclosure.

Claims

1. A prefabricated transformer station, wherein the prefabricated transformer station comprises a low-voltage chamber (1), a transformer chamber (2), and a medium-voltage chamber (3) that are arranged sequentially in a length direction (X) of the prefabricated transformer station, and an oil storage cabinet (21), a radiator (22), and a fan (23) are comprised inside the transformer chamber (2); the oil storage cabinet (21) is configured to accommodate an iron core and a coil of a transformer, and the radiator (22) is arranged on a side of the oil storage cabinet (21) in a width direction (Y) of the prefabricated transformer station; the radiator (22) comprises a first oil tube (221) and a second oil tube (222), and the first oil tube (221) and the second oil tube (222) are arranged in a height direction (Z) of the prefabricated transformer station, and both are in communication with an internal portion of the oil storage cabinet (21); the fan (23) is arranged below the radiator (22) and blows air upward, or the fan (23) is arranged above the radiator (22) and draws air upward; and a top side of the transformer chamber (2) is open, and a side portion that is of the transformer chamber (2) and that is opposite to the radiator (22) and the fan (23) is open in the width direction (Y).

2. The prefabricated transformer station according to claim 1, wherein the prefabricated transformer station further comprises a supporting frame (26), and the supporting frame (26) is fastened to a side wall of the oil storage cabinet (21) or to a bottom wall of the transformer chamber (2); and the fan (23) is arranged below the radiator (22), and the supporting frame (26) is arranged below the fan (23) and supports the fan (23).

3. The prefabricated transformer station according to claim 2, wherein a height of the supporting frame (26) is greater than 300 mm.

4. The prefabricated transformer station according to claim 1, wherein an oil conservator (27) is further comprised inside the transformer chamber (2), and the oil conservator (27) is located above the oil storage cabinet (21) and is in communication with the oil storage cabinet (21); and the fan (23) is arranged above the radiator (22), and the fan (23) is arranged on a side of the oil conservator (27) in the width direction (Y).

5. The prefabricated transformer station according to claim 4, wherein the prefabricated transformer station further comprises a supporting frame (26), and the supporting frame (26) is fastened to a side wall of the oil storage cabinet (21) or to a top wall of the transformer chamber (2); and the supporting frame (26) comprises a mounting hole (260), the mounting hole (260) passes through the supporting frame (26) in the height direction (Z), and the fan (23) is located in the mounting hole (260).

6. The prefabricated transformer station according to any one of claims 1 to 5, wherein the prefabricated transformer station further comprises a side door (24), and the side door (24) is located on the open side portion of the transformer chamber (2) and is configured to protect the open side portion, wherein the side door (24) has a grid structure.

7. The prefabricated transformer station according to any one of claims 1 to 6, wherein the prefabricated transformer station further comprises a cover (25), and the cover (25) is fastened to the open top side of the transformer chamber (2) and is configured to protect the open top side, wherein the cover (25) has a grid structure.

8. The prefabricated transformer station according to any one of claims 1 to 3, wherein a distance between a bottom portion of the radiator (22) and the bottom wall of the transformer chamber (2) is d1, and d1 is greater than 450 mm; and the fan (23) is arranged between the bottom portion of the radiator (22) and the bottom wall of the transformer chamber (2).

9. The prefabricated transformer station according to any one of claims 1 to 3, wherein the fan (23) is arranged below the radiator (22), a distance between a bottom portion of the fan (23) and the bottom wall of the transformer chamber (2) is d3, and d3 is greater than 300 mm.

10. The prefabricated transformer station according to any one of claims 1 to 9, wherein a distance between the first oil tube (221) and the second oil tube (222) is d2, and d2 is less than 1700 mm.

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