High-voltage dynamic reactive power compensation device

Abstract

The invention relates to the field of power equipment, in particular to a high-voltage dynamic reactive power compensation device which comprises a box body, a fan and a protective shell, the box body is provided with a containing cavity, the outer wall of the box body is provided with an air inlet and a ventilation opening, the air inlet and the ventilation opening are communicated with the containing cavity, the fan is fixedly connected to the outer wall of the box body, and the protective shell covers the periphery of the fan. One end of the protective shell away from the box body is provided with an air outlet; the filter screen covers the air inlet; the device further comprises a shielding piece, the shielding piece comprises a hinge seat and a plurality of rain baffles, the hinge seat is fixedly connected to the outer wall of the box body, the hinge seat is provided with a hinge opening, one end of each rain baffle is fixedly connected with a hinge column, the hinge column is coaxially and rotatably connected to the inner wall of the hinge opening, and the multiple rain baffles are used for shielding the air inlet. And in external rainy and snowy weather, the shielding plate shields rain and snow, so that external water stains entering the accommodating cavity are reduced, and the service life of the high-voltage dynamic reactive power compensation device is prolonged.

Description

Technical Field

[0001] The present application relates to the field of electric power equipment, and in particular to a high-voltage dynamic reactive power compensation device. Background Art

[0002] High-voltage dynamic reactive power compensation device is a device that uses power electronic technology to improve the efficiency and stability of the power grid by dynamically adjusting the reactive power in the power grid. SVG (static synchronous compensator, also known as static var generator) is a typical form of high-voltage dynamic reactive power compensation device. Its basic principle is to connect the self-commutated bridge circuit to the power grid through a transformer or reactor, appropriately adjust the amplitude and phase of the output voltage on the AC side of the bridge circuit, or directly control its AC side current, so that the circuit absorbs or emits reactive current that meets the requirements, and achieves the purpose of dynamic reactive power compensation.

[0003] Key components in high-voltage reactive power compensation devices, such as IGBT power modules, generate a lot of heat when working. If the temperature is too high, the service life of the components will be shortened, and in severe cases, it may even cause burning.

[0004] In existing devices, heat is dissipated by an air cooler or a fan in the cabinet, and an air inlet duct and an air outlet duct need to be set up in the cabinet. However, in rainy and snowy weather, water vapor can easily enter the cabinet through the air inlet duct. Excessive water vapor content in the cabinet can easily affect the service life of electronic components, easily cause equipment short circuits, and affect the service life of the equipment. Summary of the invention

[0005] In order to extend the service life of the equipment, the present application provides a high-voltage dynamic reactive power compensation device.

[0006] The present application provides a high-voltage dynamic reactive power compensation device that adopts the following technical solution: A high-voltage dynamic reactive power compensation device comprises a box, a fan and a protective shell, wherein the box is provided with a containing cavity, the outer wall of the box is provided with an air inlet and a vent, the air inlet and the vent are both connected to the containing cavity, the fan is fixedly connected to the outer wall of the box, the inlet of the fan faces the vent, one side of the protective shell is provided with a protective groove, the protective shell cover is provided on the outer periphery of the fan, the protective shell is fixedly connected to the outer wall of the box, an exhaust port is provided at one end of the protective shell away from the box, the exhaust port is connected to the protective groove, and the outlet of the fan faces the exhaust port; It also includes a filter screen, which is fixedly connected to the inner wall of the accommodating cavity and covers the air inlet; It also includes a shielding member, the shielding member includes a hinge seat and a rain shield, the hinge seat is fixedly connected to the outer wall of the box, the hinge seat is provided with a hinge port, the axis of the hinge port is horizontal and parallel to the filter screen, one end of the rain shield is fixedly connected to a hinge column, the hinge column is coaxially rotatably connected to the inner wall of the hinge port, the hinge column abuts the outer wall of the box, a plurality of the rain shields are provided, the plurality of the rain shields are evenly spaced along the vertical direction, and the plurality of the rain shields are used to shield the air inlet; The shielding member further comprises a connecting rod, one end of the rain shield away from the box body is fixedly connected to a connecting column, the connecting rod is arranged between two adjacent rain shields, and the two ends of the connecting rod are respectively hinged to the two connecting columns; The shielding member also includes a torsion spring, a carrying box and a pull rope. The outer wall of the hinge column is coaxially provided with an annular groove, the torsion spring is sleeved on the outer periphery of the hinge column, the torsion spring is arranged in the annular groove, one end of the torsion spring is fixedly connected to the inner wall of the hinge interface, and the other end of the torsion spring is fixedly connected to the bottom of the annular groove. The carrying box is arranged below the air inlet, and the carrying box is slidably connected to the outer wall of the box body. The sliding direction of the carrying box is vertical, one end of the pull rope is fixedly connected to the end of the rain shield away from the box body, and the other end of the pull rope is fixedly connected to the end of the carrying box close to the box body. The upper end of the carrying box is provided with a carrying groove, and the lower end of the carrying box is provided with a water leakage port, and the water leakage port is connected to the carrying groove.

[0007] By adopting the above technical solution, the fan is arranged outside and does not occupy the space inside the cabinet, which reduces the overall volume of the cabinet, reduces the transportation cost and space cost, and at the same time, facilitates ventilation and heat dissipation, and improves the heat dissipation efficiency. The filter reduces the entry of external impurities into the accommodating chamber, and prolongs the service life of the high-voltage dynamic reactive compensation device. When it is rainy and snowy outside, the baffle shields the rain and snow, reduces the entry of external water stains into the accommodating chamber, and prolongs the service life of the high-voltage dynamic reactive compensation device. The connecting rod enables multiple rain shields to rotate synchronously, which is convenient for adjusting the inclination angle of the rain shield to achieve the shielding of rain and snow. When the rain and snow are heavy, the speed at which the rain and snow enter the bearing tank is greater than the speed at which the water leaks out. The rain and snow accumulate in the bearing tank, the weight increases, and it slides downward, and the rain shield is driven to rotate by the pull rope, further shielding the air inlet, so that the external rainwater is not easy to enter the accommodating chamber.

[0008] Preferably, it also includes hygroscopic cotton, one side of which is fixedly connected to one end of the rain shield facing the air inlet, and the other side of which is used to abut against the filter screen.

[0009] By adopting the above technical solution, when it rains or snows heavily, the rain shield rotates so that the moisture-absorbing cotton presses against the filter screen, the air intake is reduced, and the moisture-absorbing cotton reduces the external water vapor entering the accommodating cavity, thereby protecting the components in the equipment.

[0010] Preferably, it also includes a grille plate, a control panel and a switch, wherein the grille plate is fixedly connected to the inner wall of the vent, the grille plate is provided with a first strip opening, the control panel is arranged in the accommodating cavity, the control panel is slidably connected to the grille plate, the control panel is provided with a second strip opening, the sliding of the control panel is used to control the connection between the first strip opening and the second strip opening to realize the on-off control of the vent, the switch is fixedly connected to the inner wall of the accommodating cavity, the switch is used for the control panel to abut, and the switch is electrically connected to the fan.

[0011] By adopting the above technical solution, the control panel slides to control whether the first strip opening and the second strip opening are connected. When the vent is not ventilated, the control panel abuts against the switch to stop the fan, thereby saving electricity.

[0012] Preferably, it also includes a sliding column, a first rack, a second rack, a bracket and a gear, the box body is provided with a through opening, the sliding column is slidably connected to the inner wall of the through opening, one end of the sliding column is arranged outside the box body, and the other end of the sliding column is arranged in the accommodating cavity, the first rack is fixedly connected to the sliding column, the second rack is fixedly connected to the control board, the bracket is fixedly connected to the inner wall of the accommodating cavity, the gear is rotatably connected to the bracket around its own axis, the first rack and the second rack are both meshed with the gear, and when the sliding column moves into the accommodating cavity, the first strip opening and the second strip opening are misaligned.

[0013] By adopting the above technical solution, when all air inlets are completely covered by the rain shield, no air can enter. The rotation of the fan will make the pressure in the accommodating chamber lower than the external atmospheric pressure. The sliding of the sliding column will cause the control panel to slide, the fan will stop working, and the vents will be closed, reducing the entry of external water vapor into the accommodating chamber.

[0014] Preferably, it also includes a partition plate, a power cabinet, a control cabinet and a reactor cabinet, the partition plate is fixedly connected to the bottom wall of the accommodating chamber, the partition plate divides the accommodating chamber into a first chamber and a second chamber, the power cabinet is fixedly connected to the inner wall of the first chamber, the control cabinet and the reactor cabinet are both fixedly connected to the inner wall of the second chamber, the air inlet includes a first air inlet, a second air inlet and a third air inlet, the first air inlet is connected to the first chamber, the second air inlet, the third air inlet and the ventilation port are all connected to the second chamber, the second air inlet and the third air inlet are respectively close to the two ends of the second chamber, the ventilation port is arranged between the second air inlet and the third air inlet, and a connecting port is provided at the upper end of the partition plate, and the connecting port is connected to the first chamber and the second chamber.

[0015] By adopting the above technical solution, the first air inlet takes in air and the connecting port exhausts air, thereby realizing ventilation of the first chamber, and the second air inlet and the third air inlet take in air and the ventilating port exhausts air, thereby realizing ventilation of the second chamber and improving the heat dissipation efficiency.

[0016] Preferably, the power cabinet includes a frame, a power unit, a first insulating plate and a second insulating plate, the power unit is fixedly connected to the frame, the first insulating plate is arranged above the power unit, the second insulating plate is arranged below the power unit, and the first insulating plate and the second insulating plate are both fixedly connected to the frame.

[0017] By adopting the above technical solution, a certain space needs to be reserved above and below the power unit for creepage. Providing the first insulating plate and the second insulating plate can reduce the height of the reserved space, thereby reducing the volume of the cabinet and facilitating user use.

[0018] In summary, the present application includes at least one of the following beneficial technical effects: The fan is installed outside and does not occupy the space inside the cabinet, which reduces the overall volume of the cabinet, reduces transportation cost and space cost, and at the same time, facilitates ventilation and heat dissipation, and improves heat dissipation efficiency; It is necessary to reserve a certain space above and below the power unit for creepage. Providing the first insulating plate and the second insulating plate can reduce the height of the reserved space, thereby reducing the volume of the cabinet and facilitating user use. When all air inlets are completely covered by the rain shield, no air can enter. The rotation of the fan will make the pressure in the accommodating chamber lower than the external atmospheric pressure. The sliding of the sliding column will cause the control panel to slide, the fan will stop working, and the vents will be closed, reducing the entry of external water vapor into the accommodating chamber. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a schematic diagram of the overall structure of a high-voltage dynamic reactive power compensation device.

[0020] Figure 2 It is a cross-sectional view of a high voltage dynamic reactive power compensation device.

[0021] Figure 3 It is a cross-sectional view of a high-voltage dynamic reactive power compensation device, mainly used to display the box, partition plate and power cabinet.

[0022] Figure 4 It is a schematic diagram of the internal structure of the high-voltage dynamic reactive power compensation device after being cut open.

[0023] Figure 5 It is a schematic diagram of the overall structure of the shielding member.

[0024] Figure 6 yes Figure 2 Enlarged view of point A in the middle.

[0025] Explanation of the reference numerals: 1. box body; 11. shell; 111. accommodating chamber; 1111. first chamber; 1112. second chamber; 112. first mounting opening; 113. second mounting opening; 114. ventilation opening; 115. third mounting opening; 12. first mounting door; 13. second mounting door; 14. air inlet; 141. first air inlet; 142. second air inlet; 143. third air inlet; 15. guide groove; 16. through opening; 17. third mounting door; 2. partition plate; 21. connecting opening; 3. control cabinet; 4. reactor cabinet; 5. power cabinet; 51. frame; 52. power unit; 53. first insulating plate; 54. second insulating plate; 6. air cooling assembly; 61. fan; 62. protective shell; 621. protective slot; 622, exhaust outlet; 623, guide surface; 63, filter; 7, shielding member; 71, hinged seat; 711, hinged interface; 72, rain shield; 721, hinged column; 722, connecting column; 723, ring groove; 73, torsion spring; 74, connecting rod; 741, rotating mouth; 75, bearing box; 751, guide block; 752, bearing slot; 753, leaking mouth; 76, pull rope; 77, moisture-absorbing cotton; 8, control member; 81, grille plate; 811, first strip mouth; 812, limit groove; 82, control board; 821, limit block; 822, second strip mouth; 83, sliding column; 831, anti-slip plate; 84, sealing ring; 85, first rack; 86, second rack; 87, bracket; 88, gear; 89, switch. DETAILED DESCRIPTION

[0026] The following is combined with Figure 1-6 This application is described in further detail.

[0027] The present application embodiment discloses a high voltage dynamic reactive power compensation device. Figure 1 and Figure 2 The high-voltage dynamic reactive power compensation device includes a box body 1, a partition plate 2, a control cabinet 3, a reactor cabinet 4, a power cabinet 5, an air cooling component 6, a shielding member 7 and a control member 8.

[0028] Reference Figure 2 The box body 1 includes a shell 11, a first installation door 12, a second installation door 13 and a third installation door 17. The shell 11 is in the shape of a rectangular parallelepiped, and the shell 11 is provided with a receiving cavity 111. The partition plate 2 is fixedly connected to the inner wall of the receiving cavity 111, the partition plate 2 is parallel to the length direction of the shell 11, the partition plate 2 is perpendicular to the bottom wall of the receiving cavity 111, and the partition plate 2 divides the receiving cavity 111 into a first chamber 1111 and a second chamber 1112, and the partition plate 2 is set as a heat dissipation plate.

[0029] The first installation opening 112 and the second installation opening 113 are respectively provided at both ends of the shell 11. The first installation opening 112 and the second installation opening 113 are both connected to the second chamber 1112. The first installation door 12 is hinged to the inner wall of the first installation opening 112, and the second installation door 13 is hinged to the inner wall of the second installation opening 113. The hinge axes of the first installation door 12 and the second installation door 13 are both vertical. A third installation opening 115 is provided on one side of the shell 11, and a vent 114 is provided on the other side of the shell 11. The third installation opening 115 is connected to the first chamber 1111, and the vent 114 is connected to the second chamber 1112. There are two third installation openings 115, and the two third installation openings 115 are arranged at intervals along the length direction of the shell 11. There are two third installation doors 17, and the third installation doors 17 are arranged one-to-one with the third installation openings 115. The third installation door 17 is hinged to the inner wall of the third installation opening 115, and the hinge axis of the third installation door 17 is vertical.

[0030] Reference Figure 2 and Figure 3 The outer wall of the box body 1 is provided with an air inlet 14, and the air inlet 14 includes a first air inlet 141, a second air inlet 142 and a third air inlet 143. The third installation door 17 is provided with a first air inlet 141, the first installation door 12 is provided with a second air inlet 142, and the second installation door 13 is provided with a third air inlet 143. The first air inlet 141 is connected to the first chamber 1111, and the second air inlet 142 and the third air inlet 143 are both connected to the second chamber 1112. A connecting port 21 is provided at the upper end of the partition plate 2, and the connecting port 21 is connected to the first chamber 1111 and the second chamber 1112. The height of the vent 114 is greater than the height of the air inlet 14.

[0031] The control cabinet 3 and the reactor cabinet 4 are both fixedly connected to the bottom wall of the second chamber 1112. The control cabinet 3 is arranged close to the first installation door 12, and the reactor cabinet 4 is arranged between the control cabinet 3 and the second installation door 13. The power cabinet 5 is fixedly connected to the inner wall of the first chamber 1111. The power cabinet 5 includes a frame 51, a power unit 52, a first insulating plate 53 and a second insulating plate 54. The power unit 52 is fixedly connected to the frame 51. The first insulating plate 53 is arranged above the power unit 52. The second insulating plate 54 is arranged below the power unit 52. The first insulating plate 53 and the second insulating plate 54 are both fixedly connected to the frame 51. The first insulating plate 53 and the second insulating plate 54 are both parallel to the bottom wall of the accommodating cavity 111. The height of the first insulating plate 53 is less than the height of the connecting port 21.

[0032] Reference Figure 1 and Figure 2The air cooling assembly 6 includes a fan 61, a protective shell 62 and a filter 63. The fan 61 is fixedly connected to the outer wall of the box body 1, the inlet of the fan 61 faces the vent 114, a protective groove 621 is provided on one side of the protective shell 62, the protective shell 62 is covered on the outer periphery of the fan 61, the protective shell 62 is fixedly connected to the outer wall of the box body 1, an exhaust port 622 is provided at one end of the protective shell 62 away from the box body 1, the exhaust port 622 is connected to the protective groove 621, and the outlet of the fan 61 faces the exhaust port 622. A guide surface 623 is provided at the upper end of the protective shell 62, the guide surface 623 extends to the end away from the box body 1, and the height of the guide surface 623 decreases as it approaches the two ends of the box body 1.

[0033] Reference Figure 2 There are multiple filter screens 63, and the filter screens 63 are arranged one by one corresponding to the first air inlet 141, the second air inlet 142 and the third air inlet 143. The filter screens 63 are fixedly connected to the inner wall of the accommodating chamber 111, and the filter screens 63 cover the air inlet 14, so that the outside air is filtered by the filter screens 63 before entering the accommodating chamber 111.

[0034] Reference Figure 4 and Figure 5 , there are multiple shielding members 7, and the shielding members 7 are arranged one by one with the filter screen 63. The shielding member 7 includes a hinge seat 71, a rain shield 72, a torsion spring 73, a connecting rod 74, a carrying box 75, a drawstring 76 and a moisture-absorbing cotton 77. The hinge seat 71 is fixedly connected to the outer wall of the box body 1. There are eight hinge seats 71, and the eight hinge seats 71 are evenly divided into two groups. The two groups of hinge seats 71 are respectively arranged on both sides of the air inlet 14. Each group of hinge seats 71 is evenly spaced along the vertical direction. The hinge seat 71 is provided with a hinge port 711, and the axis of the hinge port 711 is horizontal and parallel to the filter screen 63. There are four rain shields 72, which are evenly spaced along the vertical direction and used to shield the air inlet 14. One end of the rain shield 72 is fixedly connected to a hinge column 721, and the other end of the rain shield 72 is fixedly connected to a connecting column 722. When the rain shield 72 is vertical, the connecting column 722 can abut against the hinge column 721 below.

[0035] The two ends of the hinge column 721 are coaxially connected to the inner walls of the two hinge ports 711, and the hinge column 721 abuts against the outer wall of the box body 1. The outer wall of the hinge column 721 is coaxially provided with an annular groove 723. The torsion spring 73 is sleeved on the outer periphery of the hinge column 721. The torsion spring 73 is arranged in the annular groove 723. One end of the torsion spring 73 is fixedly connected to the inner wall of the hinge port 711, and the other end of the torsion spring 73 is fixedly connected to the bottom of the annular groove 723.

[0036] Reference Figure 4 and Figure 5, both ends of the connecting rod 74 are provided with a rotation opening 741, the connecting rod 74 is arranged on the side of the hinge seat 71 away from the air inlet 14, there are three connecting rods 74, the connecting rod 74 is arranged between two adjacent rain shields 72, and the connecting column 722 is coaxially rotatably connected to the inner wall of the rotation opening 741. The carrying box 75 is arranged below the air inlet 14, the outer wall of the box body 1 is provided with a guide groove 15, the length direction of the guide groove 15 is vertical, the outer wall of the carrying box 75 is fixedly connected with a guide block 751, the guide block 751 is slidably embedded in the guide groove 15, the guide block 751 is set as a trapezoidal block, and the guide groove 15 is set as a trapezoidal groove. One end of the pull rope 76 is fixedly connected to the end of the rain shield 72 away from the box body 1, and the other end of the pull rope 76 is fixedly connected to the end of the carrying box 75 close to the box body 1, the upper end of the carrying box 75 is provided with a bearing groove 752, and the lower end of the carrying box 75 is provided with a water leakage opening 753, and the water leakage opening 753 is connected to the bearing groove 752.

[0037] One side of the hygroscopic cotton 77 is fixedly connected to one end of the rain shield 72 facing the air inlet 14, and the other side of the hygroscopic cotton 77 is used to abut the filter screen 63. When the rain shield 72 is vertical, the hygroscopic cotton 77 fills the gap between the rain shield 72 and the filter screen 63 to reduce the outside air from entering the accommodating cavity 111.

[0038] Reference Figure 4 and Figure 6 The control member 8 includes a grille plate 81 , a control plate 82 , a sliding column 83 , a sealing ring 84 , a first rack 85 , a second rack 86 , a bracket 87 , a gear 88 and a switch 89 .

[0039] The grille plate 81 is fixedly connected to the inner wall of the vent 114, and the grille plate 81 is provided with a first strip opening 811, and the first strip opening 811 is provided with a plurality of first strip openings 811, and the plurality of first strip openings 811 are evenly spaced along the length direction of the box body 1, and the control board 82 is arranged in the accommodating cavity 111, and a limiting groove 812 is provided at one end of the grille plate 81 facing the accommodating cavity 111, and the limiting groove 812 is provided with two, and the two limiting grooves 812 are arranged on the upper and lower sides of the first strip opening 811, and the length direction of the limiting groove 812 is parallel to the box body 1, one side of the control board 82 is fixedly connected to a limiting block 821, the limiting block 821 is slidably embedded in the limiting groove 812, the limiting block 821 is set as a trapezoidal block, the limiting groove 812 is set as a trapezoidal groove, the control board 82 is provided with a second strip opening 822, the second strip opening 822 is provided with a plurality of second strip openings 822, and the second strip openings 822 are arranged one by one with the first strip opening 811. The sliding of the control board 82 is used to control the connection between the first strip opening 811 and the second strip opening 822, so as to realize the on-off control of the vent 114.

[0040] Reference Figure 4 and Figure 6The box body 1 is provided with a through-opening 16, which is provided on the side of the ventilation opening 114 close to the first installation door 12, the sliding column 83 is slidably connected to the inner wall of the through-opening 16, the sealing ring 84 is coaxially fixedly connected to the outer wall of the sliding column 83, the outer wall of the sealing ring 84 abuts against the inner wall of the through-opening 16, one end of the sliding column 83 is provided outside the box body 1, and the other end of the sliding column 83 is provided in the accommodating cavity 111, and both ends of the sliding column 83 are coaxially fixedly connected with anti-slip plates 831. The first rack 85 is fixedly connected to the sliding column 83, and the length direction of the first rack 85 is parallel to the axial direction of the sliding column 83. The second rack 86 is fixedly connected to one end of the control plate 82 facing the sliding column 83, and the length direction of the second rack 86 is horizontal and perpendicular to the length direction of the first rack 85. The bracket 87 is arranged between the sliding column 83 and the vent 114, and the bracket 87 is fixedly connected to the inner wall of the accommodating cavity 111. The gear 88 is connected to the bracket 87 by rotating around its own axis, and the rotation axis of the gear 88 is vertical. The first rack 85 and the second rack 86 are both meshed with the gear 88. When the sliding column 83 moves into the accommodating cavity 111, the first strip opening 811 and the second strip opening 822 are misaligned.

[0041] The switch 89 is disposed between the control board 82 and the sliding column 83 . The switch 89 is fixedly connected to the inner wall of the accommodating chamber 111 . The switch 89 is used for abutting against the control board 82 . The switch 89 is electrically connected to the fan 61 .

[0042] The implementation principle of a high-voltage dynamic reactive power compensation device in the embodiment of the present application is as follows: the fan 61 is arranged outside and does not occupy the space in the cabinet. The first insulating plate 53 and the second insulating plate 54 are arranged to reduce the height of the reserved space and reduce the overall volume of the cabinet. When it is rainy or snowy outside, the shielding plate shields the rain and snow to reduce the external water stains from entering the accommodating cavity 111. When the rain and snow are heavy, the speed at which the rain and snow enter the bearing groove 752 is greater than the speed at which the water leakage port 753 discharges. The rain and snow accumulate in the bearing groove 752, and the weight increases. Add, slide downward, drive the rain shield 72 to rotate through the pull rope 76, further block the air inlet 14, the moisture-absorbing cotton 77 presses against the filter screen 63, so that the outside rainwater is not easy to enter the accommodating chamber 111, when all the air inlets 14 are completely covered by the rain shield 72, no air can enter, the rotation of the fan 61 will make the pressure in the accommodating chamber 111 less than the outside atmospheric pressure, the sliding column 83 slides to make the control panel 82 slide, the fan 61 stops working, and the vent 114 is closed to reduce the outside water vapor from entering the accommodating chamber 111.

[0043] The above are all preferred embodiments of the present application, and the protection scope of the present application is not limited thereto. Therefore, any equivalent changes made according to the structure, shape, and principle of the present application should be included in the protection scope of the present application.

Claims

1. A high voltage dynamic reactive power compensation device, characterized in that: The invention comprises a housing (1), a fan (61) and a protective shell (62), wherein the housing (1) is provided with a containing cavity (111), the outer wall of the housing (1) is provided with an air inlet (14) and a vent (114), the air inlet (14) and the vent (114) are both connected to the containing cavity (111), the fan (61) is fixedly connected to the outer wall of the housing (1), the inlet of the fan (61) faces the vent (114), one side of the protective shell (62) is provided with a protective groove (621), the protective shell (62) is covered on the outer periphery of the fan (61), the protective shell (62) is fixedly connected to the outer wall of the housing (1), an air outlet (622) is provided at one end of the protective shell (62) facing away from the housing (1), the air outlet (622) is connected to the protective groove (621), and the outlet of the fan (61) faces the air outlet (622); It also includes a filter screen (63), the filter screen (63) being fixedly connected to the inner wall of the accommodating chamber (111), and the filter screen (63) covering the air inlet (14); It also includes a shielding member (7), the shielding member (7) including a hinge seat (71) and a rain shield (72), the hinge seat (71) being fixedly connected to the outer wall of the box body (1), the hinge seat (71) being provided with a hinge port (711), the axis of the hinge port (711) being horizontal and parallel to the filter screen (63), one end of the rain shield (72) being fixedly connected to a hinge column (721), the hinge column (721) being coaxially rotatably connected to the inner wall of the hinge port (711), the hinge column (721) being in contact with the outer wall of the box body (1), a plurality of rain shields (72) being provided, the plurality of rain shields (72) being evenly spaced along the vertical direction, and the plurality of rain shields (72) being used to shield the air inlet (14); The shielding member (7) further comprises a connecting rod (74); one end of the rain shield (72) away from the box body (1) is fixedly connected to a connecting column (722); the connecting rod (74) is arranged between two adjacent rain shields (72); and both ends of the connecting rod (74) are respectively hinged to two connecting columns (722); The shielding member (7) further comprises a torsion spring (73), a carrying box (75) and a pull rope (76); an outer wall of the hinge column (721) is coaxially provided with an annular groove (723); the torsion spring (73) is sleeved on the outer periphery of the hinge column (721); the torsion spring (73) is arranged in the annular groove (723); one end of the torsion spring (73) is fixedly connected to the inner wall of the hinge interface (711); the other end of the torsion spring (73) is fixedly connected to the bottom of the annular groove (723); the carrying box (75) is arranged below the air inlet (14). The carrying box (75) is slidably connected to the outer wall of the box body (1), the sliding direction of the carrying box (75) is vertical, one end of the pull rope (76) is fixedly connected to the end of the rain shield (72) away from the box body (1), and the other end of the pull rope (76) is fixedly connected to the end of the carrying box (75) close to the box body (1), the upper end of the carrying box (75) is provided with a carrying groove (752), and the lower end of the carrying box (75) is provided with a water leakage port (753), and the water leakage port (753) is connected to the carrying groove (752).

2. The high voltage dynamic reactive power compensation device according to claim 1, characterized in that: It also includes moisture-absorbing cotton (77), one side of the moisture-absorbing cotton (77) being fixedly connected to one end of the rain shield (72) facing the air inlet (14), and the other side of the moisture-absorbing cotton (77) being used to abut against the filter screen (63).

3. The high voltage dynamic reactive power compensation device according to claim 2, characterized in that: The invention also comprises a grille plate (81), a control panel (82) and a switch (89), wherein the grille plate (81) is fixedly connected to the inner wall of the vent (114), the grille plate (81) is provided with a first strip-shaped opening (811), the control panel (82) is arranged in the accommodating chamber (111), the control panel (82) is slidably connected to the grille plate (81), the control panel (82) is provided with a second strip-shaped opening (822), the control panel (82) is slidably used to control the connection between the first strip-shaped opening (811) and the second strip-shaped opening (822), so as to control the on and off of the vent (114), and the switch (89) is fixedly connected to the inner wall of the accommodating chamber (111), the switch (89) is used for the control panel (82) to abut against, and the switch (89) is electrically connected to the fan (61).

4. The high voltage dynamic reactive power compensation device according to claim 3 is characterized in that: The invention also comprises a sliding column (83), a first rack (85), a second rack (86), a bracket (87) and a gear (88); the housing (1) is provided with a through opening (16); the sliding column (83) is slidably connected to the inner wall of the through opening (16); one end of the sliding column (83) is arranged outside the housing (1); the other end of the sliding column (83) is arranged in the accommodating cavity (111); the first rack (85) is fixedly connected to the sliding column (83); the second rack (86) is fixedly connected to the control panel (82); the bracket (87) is fixedly connected to the inner wall of the accommodating cavity (111); the gear (88) is rotatably connected to the bracket (87) around its own axis; the first rack (85) and the second rack (86) are both meshed with the gear (88); when the sliding column (83) moves into the accommodating cavity (111), the first strip-shaped opening (811) and the second strip-shaped opening (822) are misaligned.

5. The high voltage dynamic reactive power compensation device according to claim 1, characterized in that: It also comprises a partition plate (2), a power cabinet (5), a control cabinet (3) and a reactor cabinet (4); the partition plate (2) is fixedly connected to the bottom wall of the accommodating chamber (111); the partition plate (2) divides the accommodating chamber (111) into a first chamber (1111) and a second chamber (1112); the power cabinet (5) is fixedly connected to the inner wall of the first chamber (1111); the control cabinet (3) and the reactor cabinet (4) are both fixedly connected to the inner wall of the second chamber (1112); and the air inlet (14) comprises a first air inlet (141), a second air inlet (142) and a third air inlet (143). The first air inlet (141) is connected to the first chamber (1111), the second air inlet (142), the third air inlet (143) and the ventilation port (114) are all connected to the second chamber (1112), the second air inlet (142) and the third air inlet (143) are respectively close to the two ends of the second chamber (1112), the ventilation port (114) is arranged between the second air inlet (142) and the third air inlet (143), and the upper end of the partition plate (2) is provided with a connecting port (21), and the connecting port (21) is connected to the first chamber (1111) and the second chamber (1112).

6. The high voltage dynamic reactive power compensation device according to claim 2, characterized in that: The power cabinet (5) comprises a frame (51), a power unit (52), a first insulating plate (53) and a second insulating plate (54); the power unit (52) is fixedly connected to the frame (51); the first insulating plate (53) is arranged above the power unit (52); the second insulating plate (54) is arranged below the power unit (52); and the first insulating plate (53) and the second insulating plate (54) are both fixedly connected to the frame (51).

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