Dry-type transformer and switch cabinet combined cabinet structure for photovoltaic power generation with stable voltage and high temperature resistance

Abstract

The present application relates to photovoltaic power generation technical field, especially to the parallel installation cabinet structure of high-temperature-resistant photovoltaic power generation dry-type transformer and switch cabinet, including transformer cabinet, switch cabinet and the transformer arranged in the inside of transformer cabinet, the outer wall of transformer cabinet and the outer wall of switch cabinet contact, and the fixed connection between transformer cabinet and switch cabinet, the lower end of transformer cabinet is provided with air inlet, the upper end of transformer is provided with low-voltage outgoing line copper bar and high-voltage terminal, and low-voltage outgoing line copper bar and high-voltage terminal are connected with corresponding binding post through busbar respectively, the binding post is fixedly installed on the inner side wall of transformer cabinet, and the inner side wall of transformer cabinet is also provided with busbar buffer mechanism, in the parallel installation cabinet structure, busbar buffer mechanism is arranged, the busbar is buffered, the damage of binding post and low-voltage outgoing line copper bar (high-voltage terminal) in the movement process of busbar is reduced, the stability of the whole device is improved, and stable voltage output can be realized.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of photovoltaic power generation, and particularly relates to a combined cabinet structure of a stable voltage and high temperature resistant photovoltaic power generation dry-type transformer and a switch cabinet. BACKGROUND

[0002] The dry-type transformer is a transformer in which the iron core and winding are not immersed in an insulating liquid, compared with the oil-immersed transformer. During the operation of the dry-type transformer, a high voltage switch and a low voltage switch need to be installed in a matched manner. In the field of photovoltaic power generation, in order to improve the space utilization rate, reduce the exposure of the power transmission part, and avoid the adverse effects of foreign matter on the equipment, the dry-type transformer needs to be combined with the high voltage switch cabinet and the low voltage switch cabinet.

[0003] During the combination process, the output copper bar (output terminal) of the transformer is generally directly connected to the corresponding terminal post through a busbar, and the terminal post is fixedly installed on the inner wall of the cabinet. During the operation of the dry-type transformer, the iron core vibration caused by magnetostriction and the iron core vibration caused by the leakage magnetic field between the silicon steel sheet joints and the laminations will all cause the transformer to vibrate, and the vibration direction mainly includes the horizontal direction and the vertical direction. When the cabinets are arranged side by side, the busbar is generally arranged in the horizontal direction. At this time, when the transformer vibrates in the horizontal direction, the busbar will constantly move in the horizontal direction, and the busbar will constantly pull the terminal post during the movement process. In the actual operation process, in order to reduce the damage of the busbar to the terminal post, a certain allowance is arranged for the busbar, that is, the length of the busbar is greater than the minimum straight line distance between the terminal posts, so that the busbar can slightly deform during the vibration of the transformer. However, due to the large current passing through the busbar, the cross-sectional area of the busbar is large, and the busbar as a whole still has a large rigidity. During the deformation of the busbar, a certain force is still applied to the terminal post, and after a long time of operation, the terminal post (the connection part of the busbar and the terminal post) will be damaged, affecting the stable output of the voltage. Therefore, the present application provides a combined cabinet structure of a stable voltage and high temperature resistant photovoltaic power generation dry-type transformer and a switch cabinet. SUMMARY

[0004] The purpose of the present application is to solve the problems in the prior art and provide a combined cabinet structure of a stable voltage and high temperature resistant photovoltaic power generation dry-type transformer and a switch cabinet.

[0005] In order to achieve the above purpose, the present application adopts the following technical scheme:

[0006] The parallel cabinet structure of the voltage-stabilized high-temperature-resistant photovoltaic power generation dry-type transformer and switch cabinet comprises a transformer cabinet, a switch cabinet and a transformer arranged in the transformer cabinet, the outer wall of the transformer cabinet is in contact with the outer wall of the switch cabinet, and the transformer cabinet and the switch cabinet are fixedly connected, the lower end of the transformer cabinet is provided with an air inlet, the upper end of the transformer is provided with a low-voltage outgoing copper bar and a high-voltage terminal, the low-voltage outgoing copper bar and the high-voltage terminal are respectively connected with corresponding terminal posts through bus bars, the terminal posts are fixedly installed on the inner side wall of the transformer cabinet, and a bus bar buffering mechanism is further arranged on the inner side wall of the transformer cabinet, so that the dynamic force of the bus bar in the horizontal direction can be reduced through the bus bar buffering mechanism.

[0007] The bus bar buffering mechanism comprises a metal pipe, a plurality of buffering wheels are arranged on the outer wall of the metal pipe in a uniform distribution, a friction surface is arranged at the contact position between the buffering wheel and the metal pipe, the upper end of the outer wall of the buffering wheel is in contact with the lower end surface of the bus bar, and when the transformer is transversely vibrated, the bus bar can drive the buffering wheel to reciprocatingly rotate.

[0008] Preferably, the buffering wheel is provided with a protruding portion and a recessed portion, the protruding portion and the recessed portion are located on the two sides of the contact position between the buffering wheel and the bus bar, when the bus bar is stretched, the recessed portion is in contact with the bus bar after the rotation of the buffering wheel, and when the bus bar is extruded, the protruding portion is in contact with the bus bar after the rotation of the buffering wheel.

[0009] Preferably, the height adjusting mechanism matched with the metal pipe further comprises a supporting rod, a vertical screw rod is threadedly connected to the end of the supporting rod, the upper end of the screw rod extends into the inner portion of a sleeve, the lower end of the sleeve is fixedly connected with the supporting rod, a movable rod is inserted into the inner portion of the sleeve, and the upper end of the movable rod is connected with the lower end of the metal pipe.

[0010] Preferably, the upper end of the movable rod is fixedly provided with an elastic block, the upper end of the elastic block is fixedly connected with the metal pipe, the lower end of each metal pipe is provided with at least two groups of height adjusting mechanisms, the height of the metal pipe is changed through the height adjusting mechanism, the pressure between the buffering wheel and the bus bar is adjusted, the bus bar can drive the buffering wheel to rotate in the movement process of the bus bar, and the vibration of the bus bar in the vertical direction can be weakened through the arrangement of the elastic block.

[0011] Preferably, one end of the metal pipe is connected with one end of a flexible hose, the other end of the flexible hose is connected with the back plate of the transformer cabinet, and the flexible hose is connected with the outside of the transformer cabinet.

[0012] Preferably, the two ends of the buffering wheel are fixedly provided with annular baffles.

[0013] Preferably, the baffle is provided with a mark line, and during the assembly of the cabinet body, the initial position of the buffer wheel is adjusted through the mark line, so that the convex part and the concave part are located on both sides of the contact position of the buffer wheel and the busbar.

[0014] Preferably, the switch cabinet comprises a low-voltage switch cabinet and a high-voltage switch cabinet, the low-voltage switch cabinet and the high-voltage switch cabinet are arranged on both sides of the transformer cabinet, the busbar comprises a low-voltage busbar and a high-voltage busbar, the terminal post comprises a low-voltage terminal post and a high-voltage terminal post, the low-voltage outgoing copper bar is connected with the low-voltage terminal post through the low-voltage busbar, the low-voltage terminal post is connected with a low-voltage switch in the low-voltage switch cabinet through a wire, the high-voltage terminal post is connected with the high-voltage terminal post through the high-voltage busbar, and the high-voltage terminal post is connected with a high-voltage switch in the high-voltage switch cabinet through a wire.

[0015] Preferably, the metal pipe is L-shaped, and the upper end of the vertical pipe body of the metal pipe is close to the top end of the inner wall of the transformer cabinet, and after the fan on the transformer operates, hot air accumulates in the upper part of the transformer cabinet, and at this time, the hot air is conveniently discharged from the upper end of the metal pipe.

[0016] Preferably, a filter plate is installed on the inner wall at the air inlet of the transformer cabinet.

[0017] The beneficial effects of the present application are:

[0018] 1. In the combined cabinet structure, the busbar buffer mechanism is arranged, when the transformer operates and vibrates, the busbar moves with the transformer, when the busbar moves in the horizontal direction, the buffer wheel is driven to reciprocating rotate, during the rotation of the buffer wheel, the frictional force between the buffer wheel and the outer wall of the metal pipe needs to be overcome to do work, so as to consume the energy on the busbar, unload the busbar, reduce the damage of the terminal post and the low-voltage outgoing copper bar (high-voltage terminal post) in the movement process of the busbar, improve the stability of the whole device, and realize stable voltage output.

[0019] 2. In the combined cabinet structure, after the fan on the transformer operates, the heat on the transformer is taken away by the air flow, after the air is discharged from the inside of the transformer, it accumulates in the upper part of the transformer cabinet, and finally is discharged to the outside of the transformer cabinet through the metal pipe and the flexible hose, when the air passes through the metal pipe, the heat on the metal pipe and the buffer wheel is taken away, the overheating of the buffer wheel after long-term friction with the outer wall of the metal pipe is avoided, the busbar is not affected, and the busbar is not overheated after long-term operation of the device, and the high-temperature resistance of the device is improved.

[0020] 3、The structure of the combined cabinet, the buffer wheel is provided with a convex part and a concave part, when the transformer vibrates, when the transformer pushes the busbar to the binding post, the busbar will be extruded, accompanied by the horizontal movement of the busbar, at the same time, the busbar will be slightly deformed upward, the convex part can just resist the busbar after the busbar drives the buffer wheel to rotate, ensure that the buffer wheel and the busbar have enough pressure, when the busbar moves back, the busbar can normally drive the buffer wheel to rotate; when the transformer pulls the busbar away from the binding post, the busbar will be stretched, accompanied by the horizontal movement of the busbar, at the same time, the busbar will be slightly deformed downward, the concave part just fits the busbar after the busbar drives the buffer wheel to rotate, avoid the excessive pressure between the buffer wheel and the busbar, cause unnecessary damage to the busbar and the binding post, ensure the normal operation of the device. BRIEF DESCRIPTION OF DRAWINGS

[0021] Figure 1 The main cross-sectional structure diagram of the combined cabinet structure of the stable voltage high-temperature-resistant photovoltaic power generation dry-type transformer and switch cabinet is provided for the present application;

[0022] Figure 2 The main view structure diagram of the combined cabinet structure of the stable voltage high-temperature-resistant photovoltaic power generation dry-type transformer and switch cabinet is provided for the present application;

[0023] Figure 3 The rear view structure diagram of the combined cabinet structure of the stable voltage high-temperature-resistant photovoltaic power generation dry-type transformer and switch cabinet is provided for the present application;

[0024] Figure 4 The side view structure diagram of the metal pipe and the buffer wheel of the combined cabinet structure of the stable voltage high-temperature-resistant photovoltaic power generation dry-type transformer and switch cabinet is provided for the present application;

[0025] Figure 5 The cross-sectional structure diagram of the combined cabinet structure of the stable voltage high-temperature-resistant photovoltaic power generation dry-type transformer and switch cabinet is provided for the present application; Figure 4 A-A;

[0026] Figure 6 The structure diagram of the buffer wheel of the combined cabinet structure of the stable voltage high-temperature-resistant photovoltaic power generation dry-type transformer and switch cabinet is provided for the present application; Figure 5 A-A;

[0027] Figure 7 The cross-sectional structure diagram of the height adjusting mechanism of the combined cabinet structure of the stable voltage high-temperature-resistant photovoltaic power generation dry-type transformer and switch cabinet is provided for the present application.

[0028] In the figure: 1 transformer cabinet, 2 low-voltage switch cabinet, 3 high-voltage switch cabinet, 4 transformer, 5 low-voltage outgoing copper bar, 6 high-voltage terminal, 7 low-voltage bus, 8 low-voltage terminal post, 9 high-voltage bus, 10 high-voltage terminal post, 11 low-voltage switch, 12 high-voltage switch, 13 support rod, 14 sleeve, 15 screw rod, 16 movable rod, 17 elastic block, 18 metal pipe, 19 buffer wheel, 20 baffle, 21 filter plate, 22 flexible hose, 191 protruding part, 192 recessed part. DETAILED DESCRIPTION

[0029] The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only some of the embodiments of the present application, not all.

[0030] In this embodiment, referring to Figures 1-7 , the structure of the combined cabinet of the stable voltage and high-temperature resistant photovoltaic power generation dry-type transformer and the switch cabinet comprises a transformer cabinet 1, a switch cabinet, and a transformer 4 arranged inside the transformer cabinet 1. The transformer 4 is a dry-type transformer. The lower end of the transformer 4 is provided with a fan. The inside of the transformer is provided with a cooling air duct. The transformer 4 is cooled by the fan in cooperation with the cooling air duct. The outer wall of the transformer cabinet 1 is in contact with the outer wall of the switch cabinet. The transformer cabinet 1 and the switch cabinet are fixedly connected. The lower end of the transformer cabinet 1 is provided with an air inlet. The upper end of the transformer 4 is provided with a low-voltage outgoing copper bar 5 and a high-voltage terminal 6. The low-voltage outgoing copper bar 5 and the high-voltage terminal 6 are respectively connected to the corresponding terminal posts through busbars. The terminal posts are fixedly installed on the inner side wall of the transformer cabinet 1. The inner side wall of the transformer cabinet 1 is also provided with a busbar buffer mechanism. The busbar buffer mechanism can reduce the power of the busbar in the horizontal direction.

[0031] The busbar buffer mechanism comprises a metal pipe 18. Uniformly distributed buffer wheels 19 are arranged on the outer wall of the metal pipe 18. The contact part of the buffer wheel 19 and the metal pipe 18 is provided with a friction surface. The upper end of the outer wall of the buffer wheel 19 is in contact with the lower end surface of the busbar. When the transformer 4 is transversely vibrated, the busbar can drive the buffer wheel 19 to reciprocate. The buffer wheel 19 is provided with a protruding part 191 and a recessed part 192. The protruding part 191 and the recessed part 192 are located on both sides of the contact part of the buffer wheel 19 and the busbar. When the busbar is stretched, the recessed part 192 is in contact with the busbar after the buffer wheel 19 rotates. When the busbar is extruded, the protruding part 191 is in contact with the busbar after the buffer wheel 19 rotates, as shown in Figure 6 After the protruding part 191 is removed and the recessed part 192 is filled at the same time, the cross section of the buffer wheel 19 can form a circular ring.

[0032] When transformer 4 vibrates, taking the low-voltage outgoing copper busbar 5, low-voltage busbar 7, and low-voltage terminal 8 as examples, when transformer 4 pushes low-voltage busbar 7 towards low-voltage terminal 8, low-voltage busbar 7 will be squeezed. While low-voltage busbar 7 moves horizontally, it will also deform slightly upwards. After low-voltage busbar 7 drives the buffer wheel 19 to rotate, the protrusion 191 can just hold the low-voltage busbar 7, ensuring sufficient pressure between the buffer wheel 19 and the low-voltage busbar 7. When low-voltage busbar 7 moves back, it can normally drive the buffer wheel 19 to rotate. When transformer 4 pulls low-voltage busbar 7 away from low-voltage terminal 8, low-voltage busbar 7 will be stretched. While low-voltage busbar 7 moves horizontally, the low-voltage busbar 7 will also deform slightly upwards. The low-voltage busbar 7 will deform slightly downwards. After the low-voltage busbar 7 drives the buffer wheel 19 to rotate, the recessed part 192 will fit perfectly with the low-voltage busbar 7, avoiding excessive pressure between the buffer wheel 19 and the low-voltage busbar 7, which would cause unnecessary damage to the low-voltage busbar 7, the low-voltage outgoing copper busbar 5, and the low-voltage terminal block 8, thus ensuring the normal operation of the device. If the recessed part 192 is not provided, after the buffer wheel 19 rotates, the height of the contact point between the buffer wheel 19 and the low-voltage busbar 7 will remain unchanged, while the height of the low-voltage busbar 7 itself will decrease. This would result in the buffer wheel 19 exerting a large upward thrust on the low-voltage busbar 7, which could easily cause the connection between the low-voltage busbar 7 and the low-voltage outgoing copper busbar 5 or the low-voltage terminal block 8 to loosen, affecting the normal use of the device.

[0033] It also includes a height adjustment mechanism adapted to the metal tube 18. The height adjustment mechanism includes a support rod 13, the end of which is threadedly connected to a vertical screw 15. The upper end of the screw 15 extends into the interior of a sleeve 14, and the lower end of the sleeve 14 is fixedly connected to the support rod 13. A movable rod 16 is inserted inside the sleeve 14, and the upper end of the movable rod 16 is connected to the lower end of the metal tube 18. After the entire cabinet is installed, the screw 15 is adjusted to change the height of the metal tube 18, and the distance between the buffer wheel 19 and the busbar is adjusted so that the busbar protrudes slightly upwards. Figure 5 As shown, by adjusting the pressure between the busbar and the buffer wheel 19, the friction between the busbar and the buffer wheel 19 is changed, so that the busbar can drive the buffer wheel 19 to rotate during the movement of the busbar. An elastic block 17 is fixedly installed at the upper end of the movable rod 16. The upper end of the elastic block 17 is fixedly connected to the metal tube 18. At least two sets of height adjustment mechanisms are provided at the lower end of each metal tube 18. The setting of the elastic block 17 can reduce the vibration of the busbar in the vertical direction.

[0034] The metal pipe 18 is L-shaped, and the upper end of the vertical pipe body of the metal pipe 18 is close to the top end of the inner wall of the transformer cabinet 1. One end of the metal pipe 18 is connected with one end of the flexible hose 22, and the other end of the flexible hose 22 is connected with the back plate of the transformer cabinet 1. The flexible hose 22 is connected with the outside of the transformer cabinet 1. After the fan on the transformer 4 operates, hot air will accumulate in the upper part inside the transformer cabinet 1. At this time, the hot air will be sequentially discharged to the outside of the transformer cabinet 1 through the metal pipe 18 and the flexible hose 22. Through the setting of the flexible hose 22, the metal pipe 18 can still be connected with the outside through the flexible hose 22 after the height of the metal pipe 18 is changed, so as to ensure that the air flow can be normally discharged to the outside of the transformer cabinet 1 through the metal pipe 18.

[0035] The two ends of the buffer wheel 19 are fixedly provided with the annular baffle 20. The setting of the baffle 20 avoids the deviation of the bus on the buffer wheel.

[0036] The baffle 20 is provided with a mark line. In the cabinet assembly process, the initial position of the buffer wheel 19 is adjusted through the setting of the mark line, so that the convex part 191 and the concave part 192 are located on both sides of the contact part of the buffer wheel 19 and the bus.

[0037] The filter plate 21 is installed on the inner wall of the air inlet of the transformer cabinet 1. The setting of the filter plate 21 can reduce the dust from the outside into the cabinet.

[0038] Working principle: in the cabinet structure, the bus buffer mechanism is arranged. When the transformer 4 vibrates during operation, the bus will move with the transformer 4. When the bus moves in the horizontal direction, the buffer wheel 19 can be driven to reciprocating rotate. During the rotation of the buffer wheel 19, the frictional force between the buffer wheel 19 and the outer wall of the metal pipe 18 needs to be overcome to do work, so as to consume the energy on the bus, unload the bus, reduce the damage of the bus to the terminal post and the low-voltage outgoing line copper bar 5 (high-voltage terminal 6) during the movement of the bus, improve the stability of the whole device, and realize stable voltage output.

[0039] In the cabinet structure, after the fan on the transformer 4 operates, the heat on the transformer 4 is taken away by the air flow. After the air is discharged from the inside of the transformer 4, it accumulates in the upper part inside the transformer cabinet 1, and finally is discharged to the outside of the transformer cabinet 1 through the metal pipe 18 and the flexible hose 22. When the air passes through the metal pipe 18, the heat on the metal pipe 18 and the buffer wheel 19 can be taken away, so as to avoid the overheating of the buffer wheel 19 after the long-term friction between the buffer wheel 19 and the outer wall of the metal pipe 18, ensure that the bus will not be affected, and improve the high-temperature resistance of the device.

[0040] The above merely describes preferred specific embodiments of the present application, but the protection scope of the present application is not limited thereto, and any person skilled in the art, according to the technical solution and inventive concept of the present application, makes equivalent replacement or change within the technical range disclosed by the present application, which should be covered within the protection scope of the present application.

Claims

1. A combined cabinet structure of a voltage-stabilized high-temperature-resistant photovoltaic power generation dry-type transformer and a switch cabinet, comprising a transformer cabinet (1), a switch cabinet, and a transformer (4) arranged inside the transformer cabinet (1), the outer wall of the transformer cabinet (1) is in contact with the outer wall of the switch cabinet, and the transformer cabinet (1) and the switch cabinet are fixedly connected, characterized in that, The lower end of the transformer cabinet (1) is provided with an air inlet, the upper end of the transformer (4) is provided with a low-voltage outgoing copper bar (5) and a high-voltage terminal (6), the low-voltage outgoing copper bar (5) and the high-voltage terminal (6) are connected with corresponding binding posts through bus bars, the binding posts are fixedly installed on the inner side wall of the transformer cabinet (1), and a bus bar buffering mechanism is also arranged on the inner side wall of the transformer cabinet (1), so that the dynamic force of the bus bar in the horizontal direction can be reduced. The bus bar buffering mechanism comprises a metal pipe (18), uniform buffer wheels (19) are arranged on the outer wall of the metal pipe (18), a friction surface is arranged at the contact position of the buffer wheel (19) and the metal pipe (18), the upper end of the outer wall of the buffer wheel (19) is in contact with the lower end surface of the bus bar, and the bus bar can drive the buffer wheel (19) to reciprocatingly rotate when the transformer (4) is transversely vibrated. The buffer wheel (19) is provided with a convex portion (191) and a recessed portion (192), the convex portion (191) and the recessed portion (192) are located on the two sides of the contact position of the buffer wheel (19) and the bus bar, the recessed portion (192) is in contact with the bus bar after the buffer wheel (19) rotates when the bus bar is stretched, and the convex portion (191) is in contact with the bus bar after the buffer wheel (19) rotates when the bus bar is extruded. The height adjusting mechanism comprises a supporting rod (13), a vertical screw rod (15) is threadedly connected to the end of the supporting rod (13), the upper end of the screw rod (15) extends into a sleeve pipe (14), the lower end of the sleeve pipe (14) is fixedly connected with the supporting rod (13), a movable rod (16) is arranged in the sleeve pipe (14), and the upper end of the movable rod (16) is connected with the lower end of the metal pipe (18). The upper end of the movable rod (16) is fixedly provided with an elastic block (17), the upper end of the elastic block (17) is fixedly connected with the metal pipe (18), and the lower end of each metal pipe (18) is provided with at least two groups of height adjusting mechanisms.

2. The voltage-stabilized high-temperature-resistant photovoltaic power generation dry-type transformer and switch cabinet combined cabinet structure according to claim 1, characterized in that, One end of the metal pipe (18) is connected with one end of a flexible hose (22), the other end of the flexible hose (22) is connected with the back plate of the transformer cabinet (1), and the flexible hose (22) is connected with the outside of the transformer cabinet (1).

3. The voltage-stabilized high-temperature-resistant photovoltaic power generation dry-type transformer and switch cabinet combined cabinet structure according to claim 1, characterized in that, The two ends of the buffer wheel (19) are fixedly provided with annular baffles (20).

4. The voltage-stabilized high-temperature-resistant photovoltaic power generation dry-type transformer and switch cabinet combined cabinet structure according to claim 3, characterized in that, The baffles (20) are provided with mark lines.

5. The voltage-stabilized high-temperature-resistant photovoltaic power generation dry-type transformer and switch cabinet combined cabinet structure according to claim 1, characterized in that, The switch cabinet comprises a low-voltage switch cabinet (2) and a high-voltage switch cabinet (3), the low-voltage switch cabinet (2) and the high-voltage switch cabinet (3) are arranged on two sides of the transformer cabinet (1), the bus comprises a low-voltage bus (7) and a high-voltage bus (9), the terminal post comprises a low-voltage terminal post (8) and a high-voltage terminal post (10), the low-voltage outgoing copper bar (5) is connected with the low-voltage terminal post (8) through the low-voltage bus (7), the low-voltage terminal post (8) is connected with a low-voltage switch (11) in the low-voltage switch cabinet (2) through a wire, the high-voltage terminal (6) is connected with the high-voltage terminal post (10) through the high-voltage bus (9), and the high-voltage terminal post (10) is connected with a high-voltage switch (12) in the high-voltage switch cabinet (3) through a wire.

6. The voltage-stabilized high-temperature-resistant photovoltaic power generation dry-type transformer and switch cabinet combined cabinet structure according to claim 2, characterized in that, The metal pipe (18) is L-shaped, and the upper end of the vertical pipe body of the metal pipe (18) is close to the top end of the inner wall of the transformer cabinet (1).

7. The voltage-stabilized high-temperature-resistant photovoltaic power generation dry-type transformer and switch cabinet combined cabinet structure according to claim 1, characterized in that, A filter plate (21) is arranged on the inner wall of the air inlet of the transformer cabinet (1).

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