Anti-islanding protection device of box-type substation for new energy charging station

Abstract

The invention discloses an anti-islanding protection device of a box-type substation for a new energy charging station, and the device comprises a box body, the top of the box body is provided with a ceiling, the outer walls of the two sides of the box body are provided with openings, and the outer wall of one side of the box body is fixedly provided with a filter plate located at one opening. And a cooling fan is arranged in the other hole of the box body, a fixing block is fixedly installed on the inner top of the box body, and a control assembly is arranged on the fixing block. Through the integrated control assembly, the cleaning assembly and the heat removal warning assembly, the motor can be automatically started and stopped according to temperature changes, energy is effectively saved, through swing of a cleaning brush rod, a filter plate is automatically cleaned, a filter screen is prevented from being blocked, the heat dissipation efficiency is remarkably improved, hot air of the box body can be rapidly pumped and exhausted when the motor works, and the internal environment is kept appropriate; and a warning mechanism is triggered through the movement of the magnetic plug block, and a sound is given out in time for reminding, so that a worker can make a response quickly and carry out necessary overhaul and maintenance.

Description

Technical Field

[0001] The present invention relates to the technical field of transformer substations, and in particular to an anti-islanding protection device for a box-type transformer substation used in a new energy charging station. Background Art

[0002] Box-type substation, also called prefabricated substation or prefabricated substation, is a kind of high-voltage switchgear, distribution transformer and low-voltage distribution device, which has the advantages of small size, small footprint and easy installation, and is widely used in the field of new energy charging stations. However, with the large-scale grid connection of new energy, box-type substations not only face the problem of heat dissipation, but also face the severe challenge of island effect.

[0003] For example, the anti-islanding protection device for a box-type substation for a new energy charging station proposed in Chinese patent number CN221994979U, although it can cooperate with the air vents to quickly absorb and discharge the upper heat in the box-type substation body by setting up attached heat dissipation components, sealing plugs and air vents, so as to achieve the purpose of accelerating heat dissipation, but the device still has shortcomings in dealing with the islanding effect and heat dissipation control. Specifically, when an islanding effect occurs in a new energy charging station, if the internal temperature of the box-type substation is too high and the heat is not dissipated in time, it may increase the risk of damage to the equipment and even cause more serious power grid accidents. At the same time, the drainage pump of the equipment cannot start automatically to dissipate heat when the temperature inside the box is too high, and manual auxiliary operation is required. When the temperature inside the box returns to normal, it also needs to be manually shut down, which not only increases the difficulty of operation, but also reduces the automation and intelligence level of the equipment. Summary of the invention

[0004] The purpose of the present invention is to solve the shortcomings existing in the prior art and to propose an anti-islanding protection device for a box-type substation for a new energy charging station.

[0005] In order to achieve the above object, the present invention adopts the following technical solutions: An anti-islanding protection device for a box-type substation for a new energy charging station comprises a box body, a ceiling is arranged on the top of the box body, openings are arranged on the outer walls on both sides of the box body, a filter plate located at one opening is fixedly installed on the outer wall of one side of the box body, a cooling fan is arranged in the other opening of the box body, a fixing block is fixedly installed on the inner top of the box body, a control component is arranged on the fixing block, a cleaning component connected to the control component is arranged on the outer wall of one side of the box body, and two symmetrically arranged heat removal warning components are arranged on the outer wall of one side of the box body.

[0006] Preferably, the control assembly includes a heat-conducting box fixedly mounted on one side wall of the fixed block, a displacement block slidably connected to the inner wall of the heat-conducting box is arranged inside the heat-conducting box, a connecting rod slidably connected to the inner wall of the heat-conducting box is penetrated by one end of the heat-conducting box away from the fixed block, the end of the connecting rod located inside the heat-conducting box is fixedly connected to the displacement block, a rectangular block is fixedly mounted on the end of the connecting rod located outside the heat-conducting box, a mounting block is fixedly mounted on the top of the rectangular block, a first telescopic rod is fixedly mounted on one side wall of the mounting block away from the heat-conducting box, and a A hemispherical block, wherein a first spring is fixedly connected between the hemispherical block and the mounting block, the top of the rectangular block is rotatably connected to a second rotating shaft located on a side of the hemispherical block away from the mounting block, a conductive sheet and a reset sheet are fixedly installed on both side walls of the second rotating shaft, a first round rod and a conductive rod are arranged on the top of the rectangular block, the conductive sheet is located between the first round rod and the conductive rod, a convex block abutting against the hemispherical block is fixedly installed on the outer side wall of the second rotating shaft, a second round rod and a third round rod are arranged on the inner top of the box body, and the reset sheet is located between the second round rod and the third round rod.

[0007] Preferably, the cleaning assembly includes a motor fixedly mounted on an outer wall of one side of the box and located above the filter plate, the output shaft of the motor is fixedly connected to a turntable, the turntable is rotatably connected to a winding rod on a side wall away from the motor, a first rotating shaft located between the motor and the filter plate is rotatably connected to one side wall of the box, a second frame is fixedly mounted on an outer side wall of the first rotating shaft, a first frame is provided on a side of the second frame away from the turntable, and two symmetrically arranged cleaning brush rods are fixedly mounted on the outer side wall of the first rotating shaft.

[0008] The heat removal warning assembly comprises a block fixedly mounted on an outer wall of the box body, and a heat removal cylinder is fixedly mounted on one side wall of the block near the turntable, and a linkage rod is provided on the outer wall of the heat removal cylinder near the turntable, and the linkage rod is located outside the heat removal cylinder and is fixedly connected to the first frame, and the linkage rod is located inside the heat removal cylinder and is fixedly mounted on a magnetic plug block that is slidably connected to the inner wall of the heat removal cylinder. The heat removal cylinder is provided with a heat extraction pipe and a heat exhaust pipe connected to the interior thereof, and one end of the heat extraction pipe and the heat exhaust pipe connected to the heat removal cylinder are both located on a side of the magnetic plug block away from the first frame, and the block is fixedly mounted on a side wall of the block away from the heat removal cylinder, and a warning block is fixedly mounted on one side wall of the extension block, and a second telescopic rod is fixedly mounted on a side wall of the block away from the heat removal cylinder, and a magnetic block located between the warning block and the block is fixedly connected on the telescopic end of the second telescopic rod, and a second spring is fixedly connected between the magnetic block and the block.

[0009] Preferably, the conductive sheet and the conductive rod are both located in the circuit of the motor.

[0010] Preferably, the heat-conducting box is filled with glycerin on a side of the displacement block close to the fixed block.

[0011] Preferably, the winding rod passes through the second frame and the first frame in sequence, and the winding rod is slidably connected to the inner walls of the second frame and the first frame.

[0012] Preferably, one end of the heat extraction pipe away from the heat removal cylinder extends into the box body, and both the heat extraction pipe and the heat discharge pipe are provided with a one-way valve, and the magnetic plug block and the magnetic block have different magnetic properties.

[0013] Beneficial effects of the present invention: By setting up a control component, when the temperature inside the box is too high, the glycerin filled in the heat-conducting box can be heated and expanded, and the conductive sheet can be automatically deflected and contacted with the conductive rod, so that the motor can be connected to the circuit. After the temperature inside the box returns to normal, the conductive sheet can be deflected again and separated from the conductive rod, so that the motor no longer works, saving energy.

[0014] By setting up a cleaning component, after the motor is started, the two cleaning brush rods can swing left and right by rotating around the rod, so that the surface of the filter plate can be automatically cleaned, thereby effectively avoiding clogging of the filter screen and causing the internal temperature of the box to be too high, and improving the heat dissipation effect.

[0015] By setting up a heat removal warning component, the magnetic plug can move left and right after the motor is started, so that the hot air inside the box can be sucked into the heat removal cylinder through the heat extraction pipe, and then discharged to the outside through the heat exhaust pipe, so that the hot air inside the box can be discharged in time.

[0016] By setting up a heat removal warning component, when the magnetic plug moves left and right, the magnetic attraction of the magnetic plug to the magnetic block changes, causing the magnetic block to hit the warning block and make a sound, thereby reminding nearby staff to carry out inspection and maintenance in time.

[0017] The present invention integrates a control component, a cleaning component and a heat removal warning component to automatically start and stop the motor according to temperature changes, thereby effectively saving energy. The filter plate can be automatically cleaned by the swing of the cleaning brush rod to prevent filter clogging, thereby significantly improving heat dissipation efficiency. When the motor is working, hot air in the box can be quickly exhausted to maintain a suitable internal environment. The alarm mechanism is triggered by the movement of the magnetic plug, which issues a sound reminder in time, making it convenient for staff to respond quickly and carry out necessary inspections and maintenance. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 This is a schematic diagram of the three-dimensional structure of an anti-islanding protection device for a box-type substation for a new energy charging station proposed by the present invention; Figure 2 It is a schematic diagram of the three-dimensional structure inside the box of the present invention; Figure 3 It is a three-dimensional structural schematic diagram of the control component of the present invention; Figure 4 It is a schematic diagram of the three-dimensional structure inside the heat-conducting box of the present invention; Figure 5 It is a schematic diagram of the three-dimensional structure inside the heat removal cylinder of the present invention; Figure 6 It is a schematic diagram of the three-dimensional structure of the turntable and the heat removal cylinder of the present invention; Figure 7 This is a schematic diagram of the planar structure of the rectangular block in the first stage of the present invention; Figure 8 This is a schematic diagram of the planar structure of the rectangular block in the second stage of the present invention; Fig. 9 It is a schematic diagram of the planar structure of the rectangular block in the third stage of the present invention.

[0019] In the figure: 1 box, 2 ceiling, 3 block, 4 heat extraction pipe, 5 heat exhaust pipe, 6 heat removal cylinder, 7 first frame, 8 first rotating shaft, 9 cleaning brush rod, 10 filter plate, 11 warning block, 12 second frame, 13 turntable, 14 motor, 15 winding rod, 16 fixed block, 17 heat conduction box, 18 rectangular block, 19 opening, 20 first telescopic rod, 21 first spring, 22 hemispherical block, 23 first round rod, 24 conductive sheet, 25 reset sheet, 26 second round rod, 27 convex block, 28 second rotating shaft, 29 conductive rod, 30 mounting block, 31 third round rod, 32 displacement block, 33 connecting rod, 34 magnetic plug block, 35 extension block, 36 magnetic block, 37 second telescopic rod, 38 second spring, 39 linkage rod. DETAILED DESCRIPTION

[0020] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments.

[0021] Reference Figure 1-Figure 9, an anti-islanding protection device for a box-type substation for a new energy charging station, comprising a box body 1, a ceiling 2 is arranged on the top of the box body 1, openings 19 are arranged on the outer walls of both sides of the box body 1, a filter plate 10 located at one of the openings 19 is fixedly installed on the outer wall of one side of the box body 1, a cooling fan is arranged in the other opening 19 of the box body 1, a fixed block 16 is fixedly installed on the inner top of the box body 1, a control component is arranged on the fixed block 16, the control component comprises a heat-conducting box 17 fixedly installed on one side wall of the fixed block 16, a displacement block 32 slidably connected to the inner wall of the heat-conducting box 17 is arranged in the heat-conducting box 17, a connecting rod 33 slidably connected to the heat-conducting box 17 is penetrated at one end away from the fixing block 16, one end of the connecting rod 33 located in the heat-conducting box 17 is fixedly connected to the displacement block 32, a rectangular block 18 is fixedly installed on the end of the connecting rod 33 located outside the heat-conducting box 17, and a mounting block 30 is fixedly installed on the top of the rectangular block 18 A first telescopic rod 20 is fixedly installed on a side wall of the mounting block 30 away from the heat-conducting box 17, a hemispherical block 22 is fixedly installed on the telescopic end of the first telescopic rod 20, a first spring 21 is fixedly connected between the hemispherical block 22 and the mounting block 30, the top of the rectangular block 18 is rotatably connected to a second rotating shaft 28 located on the side of the hemispherical block 22 away from the mounting block 30, and a conductive sheet 24 and a reset sheet 25 are fixedly installed on the two side walls of the second rotating shaft 28, respectively. A first round rod 23 and a conductive rod 29 are arranged on the top of the rectangular block 18, the conductive sheet 24 is located between the first round rod 23 and the conductive rod 29, a convex block 27 abutting against the hemispherical block 22 is fixedly installed on the outer side wall of the second rotating shaft 28, a second round rod 26 and a third round rod 31 are arranged on the inner top of the box body 1, the reset sheet 25 is located between the second round rod 26 and the third round rod 31, and glycerin is filled on the side of the displacement block 32 in the heat-conducting box 17 close to the fixed block 16; A cleaning assembly connected to the control assembly is provided on an outer wall of one side of the box body 1, and the cleaning assembly includes a motor 14 fixedly mounted on an outer wall of one side of the box body 1 and located above the filter plate 10, the output shaft of the motor 14 is fixedly connected to a turntable 13, and a winding rod 15 is rotatably connected on a side wall of the turntable 13 away from the motor 14, a first rotating shaft 8 located between the motor 14 and the filter plate 10 is rotatably connected on one side wall of the box body 1, a second frame body 12 is fixedly mounted on an outer side wall of the first rotating shaft 8, a first frame body 7 is provided on a side of the second frame body 12 away from the turntable 13, two symmetrically arranged cleaning brush rods 9 are fixedly mounted on the outer side wall of the first rotating shaft 8, a conductive sheet 24 and a conductive rod 29 are both located in the circuit of the motor 14, the winding rod 15 sequentially penetrates the second frame body 12 and the first frame body 7, and the winding rod 15 is slidably connected to the inner walls of the second frame body 12 and the first frame body 7; Two symmetrically arranged heat removal warning components are arranged on the outer wall of one side of the box body 1, and the heat removal warning component includes a block 3 fixedly installed on an outer side wall of the box body 1, and a heat removal cylinder 6 is fixedly installed on the side wall of the block 3 close to the turntable 13, and a linkage rod 39 slidably connected to the outer wall of the heat removal cylinder 6 close to the turntable 13 is penetrated through, and the end of the linkage rod 39 located outside the heat removal cylinder 6 is fixedly connected to the first frame 7, and the end of the linkage rod 39 located inside the heat removal cylinder 6 is fixedly installed with a magnetic plug 34 slidably connected to the inner wall of the heat removal cylinder 6, and the heat removal cylinder 6 is provided with a heat extraction pipe 4 and a heat exhaust pipe 5 connected to the interior thereof, and the heat extraction pipe 4 and the heat exhaust pipe 5 are connected to the heat removal cylinder 6. One end of the cylinder 6 is located on the side of the magnetic plug 34 away from the first frame 7, an extension block 35 is fixedly installed on a side wall of the block 3 away from the heat removal cylinder 6, a warning block 11 is fixedly installed on one side wall of the extension block 35, a second telescopic rod 37 is fixedly installed on a side wall of the block 3 away from the heat removal cylinder 6, a magnetic block 36 located between the warning block 11 and the block 3 is fixedly connected to the telescopic end of the second telescopic rod 37, a second spring 38 is fixedly connected between the magnetic block 36 and the block 3, one end of the heat extraction pipe 4 away from the heat removal cylinder 6 extends into the box body 1, a one-way valve is provided in the heat extraction pipe 4 and the heat exhaust pipe 5, and the magnetic plug 34 and the magnetic block 36 have different magnetic properties.

[0022] When the present invention is used, a filter plate 10 is provided at one opening 19, and a cooling fan is provided in another opening 19. External air is filtered by the filter plate 10 and enters the housing 1. After heat exchange, it is discharged from the other opening 19 through the cooling fan to achieve heat dissipation. In the initial state, when an electrical component inside the housing 1 fails or the filter plate 10 is blocked, resulting in an excessively high temperature inside the housing 1, the heat-conducting box 17 is made of a heat-conducting material, thereby causing the temperature of the glycerin filled inside the heat-conducting box 17 to rise. Glycerin has thermal expansion and will expand when heated, thereby causing the displacement block 32 to move in a direction away from the fixed block 16. By providing a connecting rod 33, the rectangular block 18 can be moved forward. During the forward movement of the rectangular block 18, the reset sheet 25 will contact the second round rod 26 (first stage), and as the rectangular block 18 continues to move forward, the reset sheet 25, the second rotating shaft 28, the protrusion 27 and the conductive sheet 24 will move along the attached Figure 3 The state rotates counterclockwise, when the protrusion 27 rotates, the first telescopic rod 20 retracts, and the first spring 21 is compressed (the second stage). When the rectangular block 18 finally continues to move forward, the protrusion 27 moves from one side of the hemispherical block 22 to the other side, so that the conductive sheet 24 and the conductive rod 29 can be abutted (the third stage); When the conductive sheet 24 and the conductive rod 29 contact each other, the circuit of the motor 14 is connected, and the output shaft of the motor 14 drives the turntable 13 to rotate. When the turntable 13 rotates, the winding rod 15 rotates around the central axis of the turntable 13. Because the winding rod 15 passes through the second frame 12 and the first frame 7 in sequence, the winding rod 15 is slidably connected to the inner walls of the second frame 12 and the first frame 7, and the second frame 12 is fixedly mounted on the outer side wall of the first rotating shaft 8, so that the second frame 12 and the first rotating shaft 8 can swing left and right, and then the cleaning brush rod 9 can swing left and right. Because the cleaning brush rod 9 is provided with bristles, it can The dust adhering to the filter plate 10 is cleaned for air intake to avoid clogging of the filter plate 10 and improve the heat dissipation effect. Through the guidance of the two linkage rods 39, when rotating around the rod 15, the first frame 7 can move left and right, and then the two magnetic plugs 34 can move left and right. During the left and right movement of the two magnetic plugs 34, the hot air in the box body 1 will be sucked into one of the heat removal tubes 6 through one of the heat extraction pipes 4, and the hot air in the other heat removal tube 6 will be discharged to the outside air through the heat exhaust pipe 5. In this way, the hot air in the box body 1 can be discharged to the outside in time, and the temperature in the box body 1 can be reduced in time. During the left-right movement of the magnetic plug 34, the magnetic plug 34 will gradually approach the magnetic block 36 and then gradually move away from the magnetic block 36. When the magnetic plug 34 approaches the magnetic block 36, due to the different magnetic properties of the magnetic plug 34 and the magnetic block 36, the magnetic attraction of the magnetic plug 34 to the magnetic block 36 gradually increases, causing the magnetic block 36 to move away from the warning block 11, the second telescopic rod 37 retracts, and the second spring 38 is compressed. When the magnetic plug 34 moves away from the magnetic block 36, the magnetic attraction of the magnetic plug 34 to the magnetic block 36 gradually decreases, thereby causing the magnetic block 36 to move towards the direction close to the warning block 11, thereby hitting the warning block 11 and making a sound, reminding nearby staff to perform inspection and maintenance; As the temperature inside the box 1 gradually decreases and returns to normal temperature, the temperature of the glycerin filled in the heat-conducting box 17 decreases and its volume decreases, causing the rectangular block 18 to move toward the heat-conducting box 17. During this movement, the reset sheet 25 will contact the third round rod 31, and as the rectangular block 18 continues to move, the second shaft 28, the protrusion 27, the reset sheet 25 and the conductive sheet 24 will rotate clockwise, eventually causing the protrusion 27 to rotate from the other side of the hemispherical block 22 to one side and return to the initial position. The conductive sheet 24 also contacts the first round rod 23 again, and the circuit of the motor 14 is no longer connected to the circuit.

[0023] The above description is only a preferred specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can make equivalent replacements or changes according to the technical scheme and inventive concept of the present invention within the technical scope disclosed by the present invention, which should be covered by the protection scope of the present invention.

Claims

1. An anti-islanding protection device for a box-type substation for a new energy charging station, comprising a box body (1), characterized in that: The top of the box (1) is provided with a ceiling (2), and both side outer walls of the box (1) are provided with openings (19). A filter plate (10) located at one of the openings (19) is fixedly mounted on one side outer wall of the box (1), and a cooling fan is arranged in the other opening (19) of the box (1). A fixing block (16) is fixedly mounted on the inner top of the box (1), and a control component is arranged on the fixing block (16). A cleaning component connected to the control component is arranged on one side outer wall of the box (1), and two heat removal warning components arranged symmetrically are arranged on one side outer wall of the box (1).

2. The anti-islanding protection device for a box-type substation for a new energy charging station according to claim 1 is characterized in that: The control assembly comprises a heat-conducting box (17) fixedly mounted on a side wall of a fixed block (16); a displacement block (32) slidably connected to the inner wall of the heat-conducting box (17) is arranged inside the heat-conducting box (17); a connecting rod (33) slidably connected to the inner wall of the heat-conducting box (17) is provided through one end of the heat-conducting box (17) away from the fixed block (16); one end of the connecting rod (33) located inside the heat-conducting box (17) is fixedly connected to the displacement block (32); one end of the connecting rod (33) located outside the heat-conducting box (17) is fixedly mounted with a rectangular block (18); a mounting block (30) is fixedly mounted on the top of the rectangular block (18); a first telescopic rod (20) is fixedly mounted on a side wall of the mounting block (30) away from the heat-conducting box (17); a hemispherical block (22) is fixedly mounted on the telescopic end of the first telescopic rod (20); the hemispherical block (22) is fixedly mounted on the hemispherical block (22). A first spring (21) is fixedly connected between the hemispherical block (22) and the mounting block (30); the top of the rectangular block (18) is rotatably connected to a second rotating shaft (28) located on a side of the hemispherical block (22) away from the mounting block (30); a conductive sheet (24) and a reset sheet (25) are respectively fixedly mounted on two side walls of the second rotating shaft (28); a first round rod (23) and a conductive rod (29) are arranged on the top of the rectangular block (18); the conductive sheet (24) is located between the first round rod (23) and the conductive rod (29); a convex block (27) abutting against the hemispherical block (22) is fixedly mounted on the outer side wall of the second rotating shaft (28); a second round rod (26) and a third round rod (31) are arranged on the inner top of the box body (1); the reset sheet (25) is located between the second round rod (26) and the third round rod (31).

3. The anti-islanding protection device for a box-type substation for a new energy charging station according to claim 2 is characterized in that: The cleaning assembly comprises a motor (14) fixedly mounted on an outer wall of one side of the housing (1) and located above the filter plate (10); the output shaft of the motor (14) is fixedly connected to a rotating disk (13); a rotating rod (15) is rotatably connected to a side wall of the rotating disk (13) away from the motor (14); a first rotating shaft (8) located between the motor (14) and the filter plate (10) is rotatably connected to a side wall of the housing (1); a second frame (12) is fixedly mounted on an outer wall of the first rotating shaft (8); a first frame (7) is provided on a side of the second frame (12) away from the rotating disk (13); and two symmetrically arranged cleaning brush rods (9) are fixedly mounted on the outer wall of the first rotating shaft (8).

4. The anti-islanding protection device for a box-type substation for a new energy charging station according to claim 3 is characterized in that: The heat removal warning component comprises a block (3) fixedly mounted on an outer wall of a housing (1); a heat removal cylinder (6) is fixedly mounted on a side wall of the block (3) close to the turntable (13); a linkage rod (39) slidably connected to the heat removal cylinder (6) is provided through the outer wall of one end of the heat removal cylinder (6) close to the turntable (13); one end of the linkage rod (39) located outside the heat removal cylinder (6) is fixedly connected to the first frame (7); one end of the linkage rod (39) located inside the heat removal cylinder (6) is fixedly mounted with a magnetic plug (34) slidably connected to the inner wall of the heat removal cylinder (6); the heat removal cylinder (6) is provided with a heat extraction pipe (4) and a heat exhaust pipe (5) connected to the interior thereof; The ends of the heat extraction pipe (4) and the heat discharge pipe (5) connected to the heat removal cylinder (6) are both located on a side of the magnetic plug block (34) away from the first frame (7); an extension block (35) is fixedly mounted on a side wall of the block (3) away from the heat removal cylinder (6); a warning block (11) is fixedly mounted on a side wall of the extension block (35); a second telescopic rod (37) is fixedly mounted on a side wall of the block (3) away from the heat removal cylinder (6); a magnetic block (36) located between the warning block (11) and the block (3) is fixedly connected to the telescopic end of the second telescopic rod (37); and a second spring (38) is fixedly connected between the magnetic block (36) and the block (3).

5. The anti-islanding protection device for a box-type substation for a new energy charging station according to claim 3 is characterized in that: The conductive sheet (24) and the conductive rod (29) are both located in the circuit of the motor (14).

6. The anti-islanding protection device for a box-type substation for a new energy charging station according to claim 2 is characterized in that: The heat conduction box (17) is filled with glycerin on a side of the displacement block (32) close to the fixed block (16).

7. The anti-islanding protection device for a box-type substation for a new energy charging station according to claim 3 is characterized in that: The winding rod (15) passes through the second frame (12) and the first frame (7) in sequence, and the winding rod (15) is slidably connected to the inner walls of the second frame (12) and the first frame (7).

8. The anti-islanding protection device for a box-type substation for a new energy charging station according to claim 4 is characterized in that: One end of the heat extraction pipe (4) away from the heat removal cylinder (6) extends into the box body (1); both the heat extraction pipe (4) and the heat discharge pipe (5) are provided with a one-way valve; and the magnetic plug block (34) and the magnetic block (36) have different magnetic properties.

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