Compact wind power box transformer substation

Abstract

The utility model discloses a compact wind power box transformer substation which comprises a box body, a high-voltage chamber, a low-voltage chamber and a transformer chamber are arranged in the box body, the high-voltage chamber, the low-voltage chamber and the transformer chamber are distributed in a delta shape, and the low-voltage chamber and the transformer chamber are located on the same side of the high-voltage chamber. A high-voltage circuit breaker is arranged in the high-voltage chamber and located at the top of the high-voltage chamber, a high-voltage insulator is arranged in the high-voltage chamber and connected to a vertically-arranged high-voltage hanging copper bar, and the high-voltage insulator and the high-voltage hanging copper bar are both contained at the bottom of the high-voltage chamber. The high-voltage circuit breaker is electrically connected to the high-voltage hooking copper bar through a high-voltage outgoing cable; a low-voltage circuit breaker is arranged in the low-voltage chamber, a transformer is arranged in the transformer chamber, a high-voltage sleeve on the transformer extends obliquely upwards from the transformer and is connected with the high-voltage circuit breaker, and a low-voltage sleeve on the transformer extends transversely and is connected with the low-voltage circuit breaker. The wind power box transformer substation disclosed by the utility model is compact in internal arrangement, and the occupied area can be reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of transformers, and particularly relates to a compact wind power box-type substation. Background Art

[0002] The full name of the wind power box-type substation is the wind power box substation, which is a device used in a wind farm to convert the low voltage generated by a wind turbine generator into high voltage for long-distance transmission. With the continuous expansion of the scale of wind turbine generators, the capacity of the wind power box-type substation has gradually increased. In a conventional large-capacity wind power box-type substation, the high-voltage bushing outlet form is inclined downward. When arranging the high-voltage chamber, a certain safety distance needs to be maintained between the high-voltage circuit breaker and the high-voltage bushing, resulting in a relatively large size of the wind power box-type substation in the length direction and a large floor area. Content of the Utility Model

[0003] The main purpose of the utility model is to provide a compact wind power box-type substation, aiming to solve the technical problem that the size of a conventional large-capacity wind power box-type substation in the length direction is relatively large and the floor area is large in the prior art.

[0004] To achieve the above object, the compact wind power box-type substation proposed by the utility model includes a box body. A high-voltage chamber, a low-voltage chamber and a transformer chamber are arranged in the box body. The high-voltage chamber, the low-voltage chamber and the transformer chamber are distributed in a "pin" shape, and the low-voltage chamber and the transformer chamber are located on the same side of the high-voltage chamber. A high-voltage circuit breaker is arranged on one side of the high-voltage chamber close to the transformer chamber, and the high-voltage circuit breaker is located at the top of the high-voltage chamber. A high-voltage insulator is arranged on the side of the high-voltage chamber far from the transformer chamber. The high-voltage insulator is connected to a vertically arranged high-voltage hanging copper bar. Both the high-voltage insulator and the high-voltage hanging copper bar are received at the bottom of the high-voltage chamber. The high-voltage circuit breaker is electrically connected to the high-voltage hanging copper bar through a high-voltage outgoing cable. A low-voltage circuit breaker is arranged in the low-voltage chamber, and a transformer is arranged in the transformer chamber. The transformer is connected with a high-voltage bushing and a low-voltage bushing. The high-voltage bushing extends obliquely upward from the bottom of the transformer and is connected to the high-voltage circuit breaker. The low-voltage bushing extends horizontally and is connected to the low-voltage circuit breaker.

[0005] Optionally, the high-voltage circuit breaker is a high-voltage vacuum circuit breaker. A vacuum bubble is arranged on one side of the high-voltage vacuum circuit breaker close to the transformer. The vacuum bubble is located above the high-voltage bushing, and the top end of the high-voltage bushing is connected to the vacuum circuit breaker through a copper wire.

[0006] Optionally, a high-voltage current transformer, a high-voltage lightning arrester, a disconnector and an earthing switch are further arranged in the high-voltage chamber. The high-voltage current transformer, the high-voltage lightning arrester, the disconnector, the earthing switch and the high-voltage circuit breaker are connected in series through a high-voltage line.

[0007] Optionally, a low-voltage hanging copper bar and a low-voltage incoming cable are arranged at the bottom of the low-voltage chamber. A connection hole is formed at the bottom of the low-voltage hanging copper bar, and the terminal of the low-voltage incoming cable is fixedly hung on the low-voltage hanging copper bar through a bolt and the connection hole.

[0008] Optionally, the number of the connection holes is multiple, the number of pairs of the low-voltage incoming cables is multiple, the number of pairs of the low-voltage incoming cables is consistent with the number of the connection holes and they correspond one by one. The terminals of each pair of the low-voltage incoming cables are fixedly hung on the low-voltage hanging copper bar through bolts and the corresponding connection holes.

[0009] Optionally, a UPS, an auxiliary transformer, a low-voltage voltage transformer and a low-voltage current transformer are arranged in the low-voltage chamber, and the UPS, the auxiliary transformer, the low-voltage voltage transformer and the low-voltage current transformer are connected in series through a low-voltage line.

[0010] Optionally, the low-voltage circuit breaker is a low-voltage frame circuit breaker, and the low-voltage frame circuit breaker is connected to the low-voltage bushing through a copper strip.

[0011] Optionally, an air inlet and an air outlet are formed in the box body. The air inlet is formed at the bottom of the side wall of the box body corresponding to the low-voltage chamber, and the air outlet is formed at the top of the side wall of the box body corresponding to the low-voltage chamber.

[0012] Optionally, a first fan, a second fan and a third fan are arranged in the low-voltage chamber. The first fan is arranged near the air inlet and faces the low-voltage circuit breaker, the second fan is located above the low-voltage circuit breaker and faces the air outlet, and the third fan is located at the air outlet.

[0013] Optionally, a shutter is detachably installed at the air inlet, a wind protection cover is connected to the outside of the box body, the wind protection cover covers the outside of the air outlet, the wind protection cover has an opening arranged downward, and a filter screen is detachably installed at the opening.

[0014] In the compact wind power box transformer proposed by the utility model, the high-voltage chamber, the low-voltage chamber and the transformer chamber are distributed in a "pin" shape. The high-voltage circuit breaker is located at the top of the high-voltage chamber, the high-voltage bushing extends obliquely upward from the bottom of the transformer chamber to the lower part of the high-voltage circuit breaker, and the high-voltage hanging copper bar is located at the bottom of the high-voltage chamber, so that the high-voltage circuit breaker avoids the high-voltage bushing and the high-voltage hanging copper bar in the height direction, and the high-voltage circuit breaker can be arranged closer to the high-voltage bushing and the high-voltage hanging copper bar in the length direction, so that the layout of each component inside the wind power box transformer makes full use of the space in the height direction, thereby reducing the size of the wind power box transformer in the length direction, with a compact internal layout and effectively reducing the floor area of the wind power box transformer. Description of the Drawings

[0015] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on the structures shown in these drawings without paying creative work.

[0016] Figure 1 This is a schematic diagram of a top view of a compact wind turbine box transformer according to an embodiment of the utility model;

[0017] Figure 2 It is a schematic diagram of a cross-section of a compact wind turbine box transformer according to an embodiment of the utility model;

[0018] Figure 3 This is a structural schematic diagram of another cross section of a compact wind turbine box transformer according to an embodiment of the utility model;

[0019] Figure 4 It is a schematic diagram of the side structure of a compact wind turbine box transformer according to an embodiment of the utility model.

[0020] Description of Figure Numbers:

[0021]

[0022]

[0023] The realization of the purpose, functional features and advantages of the utility model will be further explained in conjunction with embodiments and with reference to the accompanying drawings. DETAILED DESCRIPTION

[0024] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0025] It should be noted that all directional indications in the embodiments of the present invention (such as up, down, left, right, front, back...) are only used to explain the relative position relationship, movement status, etc. between the components under a certain specific posture (as shown in the accompanying drawings). If the specific posture changes, the directional indication will also change accordingly.

[0026] In the present invention, unless otherwise clearly specified and limited, the terms "connection", "fixation", etc. should be understood in a broad sense. For example, "fixation" can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements, unless otherwise clearly defined. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0027] In addition, if there are descriptions involving "first", "second", etc. in the embodiments of the utility model, the descriptions of "first", "second", etc. are only used for descriptive purposes and cannot be understood as indicating or implying their relative importance or implicitly indicating the number of technical features indicated. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features. In addition, the meaning of "and / or" appearing in the full text includes three parallel schemes. Taking "A and / or B" as an example, it includes scheme A, or scheme B, or a scheme that satisfies both A and B. In addition, the technical solutions between the various embodiments can be combined with each other, but it must be based on the ability of ordinary technicians in this field to implement. When the combination of technical solutions is contradictory or cannot be implemented, it should be deemed that such a combination of technical solutions does not exist and is not within the scope of protection required by the utility model.

[0028] In the present invention, the descriptions of directions such as "upper", "lower", "front", "back", "left", and "right" are as follows: Figure 1-Figure 4 The directions shown are for reference only and are used to explain the Figure 1-Figure 4 The relative position relationship between the components in the shown posture. If the specific posture changes, the directional indication will also change accordingly.

[0029] The utility model provides a compact wind power box transformer, which comprises a box body 100. A high-voltage chamber 10, a low-voltage chamber 20 and a transformer chamber 30 are arranged in the box body 100. The high-voltage chamber 10, the low-voltage chamber 20 and the transformer chamber 30 are distributed in a "pin" shape, and the low-voltage chamber 20 and the transformer chamber 30 are located on the same side of the high-voltage chamber 10. A high-voltage circuit breaker 11 is arranged on one side of the high-voltage chamber 10 close to the transformer chamber 30, and the high-voltage circuit breaker 11 is located at the top of the high-voltage chamber 10. A high-voltage insulator 12 is arranged on the side of the high-voltage chamber 10 far from the transformer chamber 30. The high-voltage insulator 12 is connected to a vertically arranged high-voltage hanging copper row 13. Both the high-voltage insulator 12 and the high-voltage hanging copper row 13 are accommodated at the bottom of the high-voltage chamber 10. The high-voltage circuit breaker 11 is electrically connected to the high-voltage hanging copper row 13 through a high-voltage outgoing cable 14. A low-voltage circuit breaker 21 is arranged in the low-voltage chamber 20, and a transformer is arranged in the transformer chamber 30. The transformer is connected with a high-voltage bushing 31 and a low-voltage bushing 32. The high-voltage bushing 31 extends obliquely upward from the bottom of the transformer and is connected to the high-voltage circuit breaker 11, and the low-voltage bushing 32 extends horizontally and is connected to the low-voltage circuit breaker 21.

[0030] As Figure 1 shown, Figure 1 the front-back direction in Figure 2 is the length direction of the wind power box transformer. The high-voltage chamber 10 is arranged at the front side in the box body 100, and the low-voltage chamber 20 and the transformer chamber 30 are both located at the rear side of the high-voltage chamber 10. The transformer chamber 30 is located on the right side of the low-voltage chamber 20. The high-voltage chamber 10, the low-voltage chamber 20 and the transformer chamber 30 are distributed in a "pin" shape. The high-voltage bushing 31 on the transformer passes through the shell of the transformer chamber 30 and the shell of the high-voltage chamber 10 in sequence and then is connected to the high-voltage circuit breaker 11 in the high-voltage chamber 10. The low-voltage bushing 32 on the transformer passes through the shell of the high-voltage transformer chamber 30 and the shell of the low-voltage chamber 20 in sequence and then is connected to the low-voltage circuit breaker 21 in the low-voltage chamber 20. As

[0031] The compact wind power box transformer proposed by the present utility model has a "pin" - shaped distribution of a high - voltage chamber 10, a low - voltage chamber 20, and a transformer chamber 30. The high - voltage circuit breaker 11 is located at the top inside the high - voltage chamber 10. The high - voltage bushing 31 extends obliquely upward from the bottom at the rear side of the high - voltage circuit breaker 11 to below the high - voltage circuit breaker 11. The high - voltage connection copper bar 13 is located below the front side of the high - voltage circuit breaker 11, so that the high - voltage circuit breaker 11 avoids the high - voltage bushing 31 and the high - voltage connection copper bar 13 in the height direction. The high - voltage circuit breaker 11 can be arranged closer to the high - voltage bushing 31 and the high - voltage connection copper bar 13 in the length direction, enabling the layout of each component inside the wind power box transformer to make full use of the space in the height direction, thereby reducing the size of the wind power box transformer in the length direction, with a compact internal layout and effectively reducing the floor area of the wind power box transformer.

[0032] In one embodiment, the high - voltage circuit breaker 11 is a high - voltage vacuum circuit breaker. A vacuum bubble 101 is arranged on the side of the high - voltage vacuum circuit breaker close to the transformer. The vacuum bubble 101 is located above the high - voltage bushing 31, and the top end of the high - voltage bushing 31 is connected to the vacuum circuit breaker 11 through a copper wire.

[0033] Specifically, the high - voltage circuit breaker 11 adopts a high - voltage vacuum circuit breaker in the prior art. The high - voltage vacuum circuit breaker has better reliability and safety compared with conventional gas or oil - immersed transformers. The vacuum bubble 101 of the high - voltage vacuum circuit breaker extends backward to above the high - voltage bushing 31 and is connected to the high - voltage bushing 31 through a copper wire, making the high - voltage bushing 31 and the high - voltage vacuum circuit breaker as close as possible in the front - rear direction and as far as possible in the up - down direction, and the vacuum bubble 101 can ensure the interruption of the current between the high - voltage bushing 31 and the high - voltage vacuum circuit breaker.

[0034] In one embodiment, a high - voltage current transformer, a high - voltage lightning arrester, a disconnector, and an earthing switch are also arranged inside the high - voltage chamber 10. The high - voltage current transformer, the high - voltage lightning arrester, the disconnector, the earthing switch, and the high - voltage circuit breaker 11 are connected in series through a high - voltage line.

[0035] It can be understood that inside the high - voltage chamber 10, in addition to the high - voltage circuit breaker 11, a high - voltage current transformer, a high - voltage lightning arrester, a disconnector, and an earthing switch are also arranged. The high - voltage current transformer transforms the current in the high - voltage line into a measurable low - current signal for facilitating the monitoring of the current condition of the system; the high - voltage lightning arrester can quickly ground the voltage when the wind power box transformer is struck by lightning, thereby protecting the equipment inside the high - voltage chamber 10 from damage; the disconnector is used to separate the equipment or line from the power system during maintenance or repair; the earthing switch is used to ground the equipment or line to ensure the safe discharge of the charge of the live part during maintenance or in case of a fault. The high - voltage current transformer, the high - voltage lightning arrester, the disconnector, and the earthing switch are connected in series with the high - voltage circuit breaker 11 to form a five - in - one circuit breaker, jointly ensuring the safe and stable operation of the internal circuit of the high - voltage chamber 10.

[0036] In one embodiment, a low-voltage hanging copper busbar 22 and a low-voltage incoming cable 23 are provided at the bottom of the low-voltage chamber 20. A connecting hole is provided at the bottom of the low-voltage hanging copper busbar 22. The connecting terminal of the low-voltage incoming cable 23 is fixedly connected to the low-voltage hanging copper busbar 22 through bolts and the connecting hole.

[0037] It should be noted that the low-voltage bushing 32 extends horizontally into the low-voltage chamber 20 and is connected to the low-voltage circuit breaker 21. The low-voltage hanging copper busbar 22 is arranged at the bottom of the low-voltage circuit breaker 21. The connection terminal of the low-voltage incoming cable 23 is fixedly hung on the low-voltage hanging copper busbar 22 after passing through the connection hole at the bottom of the low-voltage hanging copper busbar 22 by bolts, thereby eliminating the setting of the low-voltage incoming cable 23 hanging on the low-voltage busbar, thereby reducing the amount of copper busbar settings and saving equipment costs.

[0038] In one embodiment, there are multiple connecting holes, and there are multiple pairs of low-voltage incoming cables 23. The number of pairs of low-voltage incoming cables 23 is consistent with the number of connecting holes and corresponds one to one. The wiring terminals of each pair of low-voltage incoming cables 23 are fixedly mounted on the low-voltage mounting copper bus 22 through bolts and corresponding connecting holes.

[0039] Furthermore, the number of low-voltage incoming cables 23 is twice the number of connecting holes, and the two low-voltage incoming cables 23 form a pair and are hung on the low-voltage hanging copper bus 22 after passing through the corresponding connecting holes with bolts, and the two low-voltage incoming cables 23 are respectively hung on both sides of the low-voltage hanging copper bus 22, thereby further reducing the use of copper bus and saving costs.

[0040] In one embodiment, a UPS, an auxiliary transformer 25, a low voltage voltage transformer 26 and a low voltage current transformer 27 are installed in the low voltage room 20, and the UPS, the auxiliary transformer 25, the low voltage voltage transformer 26 and the low voltage current transformer 27 are connected in series through a low voltage line.

[0041] It should be noted that the low-voltage current transformer 27 is arranged on the low-voltage hanging copper bar 22, and the low-voltage voltage transformer 26 is arranged on the top of the low-voltage cabinet. UPS, auxiliary transformer 25, low-voltage voltage transformer 26 and low-voltage current transformer 27 are connected in series on the low-voltage line. UPS is used to provide power backup for the low-voltage line. The auxiliary transformer 25 is used to adjust or reduce the voltage to provide it to the equipment on the low-voltage line. The low-voltage voltage transformer 26 is used to monitor the voltage level of the low-voltage system. The low-voltage current transformer 27 is used to monitor the current in the low-voltage system. UPS, auxiliary transformer 25, low-voltage voltage transformer 26 and low-voltage current transformer 27 are connected in series to provide a low-voltage power monitoring and protection system to ensure the safe operation of the equipment in the low-voltage room 20.

[0042] In one embodiment, the low-voltage circuit breaker 21 is a low-voltage frame circuit breaker, which is connected to the low-voltage bushing 32 through a copper strip. The low-voltage circuit breaker 21 adopts a low-voltage frame circuit breaker in the prior art, so that the low-voltage circuit breaker 21 can withstand a large current and load, and can quickly cut off the current when a short circuit occurs in the low-voltage line, effectively ensuring the safe operation of the equipment in the low-voltage room 20.

[0043] In one embodiment, an air inlet 110 and an air outlet 120 are opened on the box body 100. The air inlet 110 is opened at the bottom of the side wall of the box body 100 corresponding to the low-pressure chamber 20, and the air outlet 120 is opened at the top of the side wall of the box body 100 corresponding to the low-pressure chamber 20.

[0044] like Figure 3 and Figure 4 As shown, an air inlet 110 is opened on the side wall of the box body 100 corresponding to the low-voltage chamber 20, and the air inlet 110 is located at the bottom of the side wall, and an air outlet 120 is opened on the top of the side wall on the rear side of the box body 100, so that an air flow direction of air entering from a low place and air exiting from a high place is formed in the low-voltage chamber 20, and the air flow flows through the low-voltage circuit breaker 21 in the middle of the low-voltage chamber 20 to dissipate the heat of the low-voltage circuit breaker 21. The air flow direction is clear and the heat dissipation effect is good.

[0045] It is worth noting that if Figure 3 As shown, the shell of the high-voltage chamber 10 is provided with a first observation window 141, a second observation window 142, an illuminating lamp 150, and a charged display device 170, and the door of the high-voltage chamber 10 is provided with an electromagnetic lock 160. The first observation window 141 is provided at the bottom of the shell of the high-voltage chamber 10, so that the staff can observe the discharge counter in the high-voltage chamber 10; the second observation window 142 is provided at the top of the shell of the high-voltage chamber 10, and the illuminating lamp 150 is provided between the first observation window 141 and the second observation window 142, so that the staff can observe the high-voltage chamber 10 at night; the charged display device 170 is provided at a position corresponding to the high-voltage circuit breaker 11 on the shell, and the charged display device is electrically connected to the high-voltage current transformer in the high-voltage chamber 10, so as to monitor the charged state of the high-voltage line in real time; the electromagnetic lock 160 is used to ensure that the door of the high-voltage chamber 10 cannot be opened when the high-voltage line is in a charged state, thereby ensuring the safety of the staff.

[0046] In one embodiment, a first fan 131, a second fan 132 and a third fan 133 are disposed in the low-pressure chamber 20. The first fan 131 is disposed near the air inlet 110 and faces the low-voltage circuit breaker 21. The second fan 132 is located above the low-voltage circuit breaker 21 and faces the air outlet 120. The third fan 133 is located at the air outlet 120.

[0047] Furthermore, the first fan 131 is arranged near the air inlet 110 to blow the gas entering from the air inlet 110 toward the low-voltage circuit breaker 21 to dissipate heat for the low-voltage circuit breaker 21; the second fan 132 is arranged above the low-voltage circuit breaker 21 to blow the gas after passing through the low-pressure radiator toward the air outlet 120; the third fan 133 is arranged in the air outlet 120 to accelerate the gas to be discharged from the low-pressure chamber 20. Since the low-voltage circuit breaker 21 is the main hot spot in the low-pressure chamber 20, the three fans are arranged to effectively increase the flow speed of the gas in the low-pressure chamber 20, help the air flow to flow through the low-voltage circuit breaker 21 to complete the heat dissipation, and effectively improve the heat dissipation efficiency.

[0048] In one embodiment, the air inlet 110 is detachably mounted with a shutter 111, and a wind shield 121 is connected to the outside of the box body 100. The wind shield 121 is arranged outside the air outlet 120. The wind shield 121 has an opening arranged downward, and a filter is detachably mounted at the opening.

[0049] like Figure 3 and Figure 4 As shown, the shutter 111 is installed on the air inlet 110. The shutter 111 can adjust the air intake volume and prevent unnecessary gas and other impurities from entering the low-pressure chamber 20 to a certain extent; the wind shield 121 is arranged outside the air outlet 120. The wind shield 121 and the filter are used to prevent external gas from entering the low-pressure chamber 20 from the air outlet 120 and interfering with the airflow direction, and can prevent impurities from entering the low-pressure chamber 20 and affecting the operating environment of the equipment in the low-pressure chamber 20, thereby extending the service life of the equipment.

[0050] The above description is only an optional embodiment of the present invention, and does not limit the patent scope of the present invention. All equivalent structural changes made by using the contents of the present invention specification and drawings under the concept of the present invention, or directly / indirectly applied in other related technical fields are included in the patent protection scope of the present invention.

Claims

1. A compact wind power box transformer, characterized in that: It includes a box body, inside which there are a high-voltage chamber, a low-voltage chamber and a transformer chamber. The high-voltage chamber, the low-voltage chamber and the transformer chamber are distributed in a "pin" shape, and the low-voltage chamber and the transformer chamber are on the same side of the high-voltage chamber. On one side of the high-voltage chamber close to the transformer chamber, there is a high-voltage circuit breaker, and the high-voltage circuit breaker is located at the top of the high-voltage chamber. On the side of the high-voltage chamber far from the transformer chamber, there is a high-voltage insulator, and the high-voltage insulator is connected to a vertically arranged high-voltage hanging copper bus. Both the high-voltage insulator and the high-voltage hanging copper bus are accommodated at the bottom of the high-voltage chamber. The high-voltage circuit breaker is electrically connected to the high-voltage hanging copper bus through a high-voltage outgoing cable. In the low-voltage chamber, there is a low-voltage circuit breaker. In the transformer chamber, there is a transformer. The transformer is connected with a high-voltage bushing and a low-voltage bushing. The high-voltage bushing extends obliquely upward from the bottom of the transformer and is connected to the high-voltage circuit breaker. The low-voltage bushing extends horizontally and is connected to the low-voltage circuit breaker.

2. The compact wind power box transformer according to claim 1, characterized in that: The high-voltage circuit breaker is a high-voltage vacuum circuit breaker. On one side of the high-voltage vacuum circuit breaker close to the transformer, there is a vacuum bubble, and the vacuum bubble is located above the high-voltage bushing. The top end of the high-voltage bushing is connected to the vacuum circuit breaker through a copper wire.

3. The compact wind power box transformer according to claim 1, characterized in that: In the high-voltage chamber, there are also a high-voltage current transformer, a high-voltage lightning arrester, a disconnector and an earthing switch. The high-voltage current transformer, the high-voltage lightning arrester, the disconnector, the earthing switch and the high-voltage circuit breaker are connected in series through a high-voltage line.

4. The compact wind power box transformer according to claim 1, characterized in that: At the bottom of the low-voltage chamber, there are a low-voltage hanging copper bus and a low-voltage incoming cable. The bottom of the low-voltage hanging copper bus is provided with connection holes, and the terminal of the low-voltage incoming cable is fixedly hung on the low-voltage hanging copper bus through a bolt and the connection hole.

5. The compact wind power box transformer according to claim 4, characterized in that: The number of the connection holes is multiple, and the number of the low-voltage incoming cables is multiple pairs. The number of pairs of the low-voltage incoming cables is the same as and corresponds one by one to the number of the connection holes. The terminals of each pair of the low-voltage incoming cables are fixedly hung on the low-voltage hanging copper bus through bolts and the corresponding connection holes.

6. The compact wind power box transformer according to any one of claims 1 to 5, characterized in that: In the low-voltage chamber, there are a UPS, an auxiliary transformer, a low-voltage voltage transformer and a low-voltage current transformer, and the UPS, the auxiliary transformer, the low-voltage voltage transformer and the low-voltage current transformer are connected in series through a low-voltage line.

7. The compact wind turbine box transformer according to any one of claims 1 to 5, characterized in that: The low-voltage circuit breaker is a low-voltage frame circuit breaker. The low-voltage frame circuit breaker is connected to the low-voltage bushing through a copper strip.

8. The compact wind turbine box transformer according to any one of claims 1 to 5, characterized in that: On the box body, there are an air inlet and an air outlet. The air inlet is opened at the bottom of the side wall of the box body corresponding to the low-voltage chamber, and the air outlet is opened at the top of the side wall of the box body corresponding to the low-voltage chamber.

9. The compact wind power box transformer according to claim 8, characterized in that: In the low-voltage chamber, there are a first fan, a second fan and a third fan. The first fan is arranged close to the air inlet and faces the low-voltage circuit breaker. The second fan is located above the low-voltage circuit breaker and faces the air outlet. The third fan is located at the air outlet.

10. The compact wind power box transformer according to claim 8, characterized in that: The air inlet is detachably provided with a shutter, the outside of the box is connected with a wind shield, the wind shield is arranged outside the air outlet, the wind shield has an opening arranged downward, and a filter is detachably provided at the opening.

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