CN220822384U - Low-voltage reactive power compensation device for improving voltage quality - Google Patents

Abstract

The utility model discloses a low-voltage reactive power compensation device for improving voltage quality, which belongs to the technical field of reactive power compensation and comprises a compensation cabinet, wherein the compensation cabinet is provided with a reactive power compensation device for improving voltage quality; a cooling device for cooling the reactive power compensation device is arranged on the compensation cabinet; the compensation cabinet is provided with a waterproof device for preventing rainwater from entering; the waterproof device comprises a wind power generation assembly, a pushing reset assembly, a rectangular box, a waterproof cover, an electric storage box, a storage battery, a controller and a rainwater sensor, wherein the electric storage box and the rectangular box are connected with the wind power generation assembly, the rainwater sensor is electrically connected with the controller, the rectangular box is connected with the pushing reset assembly, the waterproof cover is connected with the pushing reset assembly, and the waterproof cover can cover a radiating window effectively in a rainy day, so that rainwater can not enter a cabinet body, and the reactive compensation device cannot be affected by damp to affect the improvement of voltage.

Description

Low-voltage reactive power compensation device for improving voltage quality

Technical Field

The utility model relates to the technical field of reactive power compensation, in particular to a low-voltage reactive power compensation device for improving voltage quality.

Background

The low-voltage reactive power compensation device is used for improving the power factor of a power grid, reducing the loss of a power supply transformer and a transmission line, improving the power supply efficiency and improving the voltage quality, and has the main functions of reactive power compensation, harmonic suppression, voltage fluctuation and flicker reduction and the like.

The utility model provides a low pressure reactive power compensator of prior art, for example chinese utility model CN213905980U, includes box, electric wire netting load detector and control box, the heat dissipation window has been seted up to the box side, fixed surface installs the protection top on the box, box one side is through hinge rotation connection chamber door, chamber door one side is provided with the handle, the observation window has been seted up on chamber door upper portion, control box fixed mounting is in the inside upper end of box, the inside fixed plate that is provided with of box, fixed plate surface fixed mounting has electrical components, the box bottom is provided with electric wire netting load detector, electric wire netting load detector upper surface fixed mounting has first passive compensation controller, second reactive compensation controller and third reactive compensation controller, the box bottom is located electric wire netting load detector one side and is provided with first compensation capacitor, second compensation capacitor and third compensation capacitor.

However, the low-voltage reactive compensation device has the problems that the capacitor can generate high temperature during operation, if the temperature is not reduced in time, the capacitor can be damaged by the high temperature to influence the use of the compensation device, and the radiating window formed in the side surface of the box body can be used for enabling rainwater to enter the box body through the radiating window under the condition of rainy days, so that the inside of the box body is wetted to influence the use of an electrical original.

Based on the above, the present utility model designs a low-voltage reactive power compensation device for improving voltage quality to solve the above problems.

Disclosure of utility model

In view of the above-mentioned drawbacks of the prior art, the present utility model provides a low voltage reactive power compensation device with improved voltage quality.

In order to achieve the above purpose, the utility model is realized by the following technical scheme:

a low-voltage reactive power compensation device for improving voltage quality comprises a compensation cabinet,

The reactive power compensation device for improving voltage quality is arranged on the compensation cabinet;

a cooling device for cooling the reactive power compensation device is arranged on the compensation cabinet;

the compensation cabinet is provided with a waterproof device for preventing rainwater from entering;

the waterproof device comprises a wind power generation assembly, a pushing reset assembly, a rectangular box, a waterproof cover, an electric storage box, a storage battery, a controller and a rainwater sensor, wherein the wind power generation assembly, the rectangular box, the electric storage box and the rainwater sensor are respectively installed on the compensation cabinet, the electric storage box is located above the rectangular box, the electric storage box and the rectangular box are both connected with the wind power generation assembly, the storage battery and the controller are respectively fixedly installed in the electric storage box, the storage battery is connected with the controller through a reactive compensation device, the rainwater sensor is electrically connected with the controller through the reactive compensation device, the rectangular box is connected with the pushing reset assembly, the waterproof cover is connected with the pushing reset assembly, and the waterproof cover is in fit contact with the compensation cabinet.

Further, the compensation cabinet comprises a cabinet body, a ceiling, a heat dissipation window, a first rectangular plate and a second rectangular plate, wherein the ceiling is fixedly arranged at the top of the cabinet body, a wind power generation assembly and a rainwater sensor are respectively and fixedly arranged on the ceiling, the wind power generation assembly, an electric storage box and the rectangular box are respectively and fixedly arranged on the outer wall of the cabinet body, the heat dissipation window is fixedly arranged on the left side and the right side of the cabinet body, and the first rectangular plate and the second rectangular plate are respectively and fixedly arranged in the cabinet body; the cabinet body, the first rectangular plate and the second rectangular plate are all connected with the reactive compensation device, and the cooling device is installed at the external upper end and the internal lower extreme of the cabinet body.

Still further, reactive power compensator includes master control room, fuse, condenser and electric wire, master control room fixed mounting is in the inside upper end of the cabinet body, the top fixed mounting of second rectangular plate has a plurality of groups fuse, the top fixed mounting of first rectangular plate has a plurality of groups condenser, the condenser is connected with heat sink, the fuse passes through the electric wire and is connected with master control room and condenser electricity respectively.

Furthermore, the lower end of the waterproof cover and one side close to the cabinet body are not closed, and the outer wall of the waterproof cover is arranged in a streamline shape.

Still further, wind power generation assembly includes drum, round bar, generator, deflector, blade, disc, wire tube and dead lever, drum fixed mounting is at the top of ceiling, the round bar rotates with the drum to be connected, the top fixed mounting of round bar has the generator, the left end of generator rotates and is connected with the disc, even fixed mounting has a plurality of groups of blade on the disc, be fixed with the dead lever on the generator, fixed mounting has the deflector on the dead lever.

Further, a cylinder, an electric storage box and a rectangular box are fixedly connected to the wire tube respectively.

Further, an electric wire is installed in the electric wire pipe.

Still further, promote reset assembly and include electric putter and spring, electric putter fixed mounting is in the inside of rectangle case, electric putter's output and buckler fixed connection, electric putter and electric wire electricity are connected, spring top and rectangle case fixed connection, the bottom and the buckler fixed connection of spring.

Still further, heat sink includes basin, flow pipe, tank, spacing mouth, heating panel, absorber plate and rectangle piece, the even fixed mounting of upper portion outer wall of the cabinet body has a plurality of groups rectangle piece, rectangle piece and basin fixed connection, the below at the ceiling is installed to the basin, the one end and the basin fixed connection of flow pipe, the other end and the tank fixed connection of flow pipe, fixed mounting has spacing mouthful on the tank, absorber plate and condenser laminating are connected, absorber plate and heating panel fixed connection, the heating panel is inserted in the tank.

Further, the water storage tank is arranged at the lower end of the inner part of the cabinet body and is positioned below the first rectangular plate.

Advantageous effects

When raining, the rainwater sensor of the waterproof device sends a signal to the controller through the reactive compensation device, the controller controls the pushing reset assembly to operate through the reactive compensation device, the pushing reset assembly pushes the waterproof cover to move downwards, the heat dissipation part of the compensation cabinet is covered, so that rainwater cannot enter the compensation cabinet, when raining stops, the rainwater sensor does not send a signal to the controller, the waterproof cover is driven to move upwards to leave the heat dissipation window by pushing the reset assembly, and compared with a common compensation cabinet, the wind power generation assembly, the pushing reset assembly, the rectangular box, the waterproof cover, the electric storage box, the storage battery, the controller and the rainwater sensor are mutually matched, so that the heat dissipation part of the compensation cabinet can be effectively covered in raining days, rainwater cannot enter the compensation cabinet, the reactive compensation device cannot be affected by damp, the voltage is improved, the waterproof cover is automatically controlled and adjusted, and the manual workload is effectively reduced.

According to the utility model, the wind blows the guide plate of the wind power generation assembly to rotate, the guide plate drives the generator to rotate to the direction from which wind comes through the fixed rod, the blades are blown by the wind to rotate, the blades drive the electric ring in the generator to rotate through the disc so as to generate electric power, the generated electric power is transmitted to the storage battery in the power storage box to be stored, sufficient electric power is provided for pushing the reset assembly, no additional power supply equipment is needed, and the use cost is greatly reduced.

According to the utility model, rainwater on a ceiling is collected through the water flowing groove of the cooling device, then the rainwater flows into the water storage tank through the water flowing pipe, when the rainwater is almost full of the water storage tank, the redundant rainwater is discharged out of the water storage tank through the limiting opening, after a part of temperature generated during the working of the capacitor is absorbed by the heat absorbing plate, the heat absorbing plate transfers heat to the heat dissipating plate, and the heat dissipating plate inserted into the water storage tank is subjected to physical cooling through the rainwater.

Drawings

In order to more clearly illustrate the embodiments of the present utility model or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below. It is evident that the drawings in the following description are only some embodiments of the present utility model and that other drawings may be obtained from these drawings without inventive effort for a person of ordinary skill in the art.

Fig. 1 is a perspective view of a low-voltage reactive power compensation device with improved voltage quality according to the present utility model.

Fig. 2 is a front view of a low-voltage reactive power compensation device with improved voltage quality according to the present utility model.

Fig. 3 is a right side view of a low voltage reactive power compensation device with improved voltage quality according to the present utility model.

Fig. 4 is a perspective view of a low-voltage reactive power compensation device with improved voltage quality according to the second embodiment of the present utility model.

Fig. 5 is a cross-sectional view taken along the A-A direction of fig. 2.

Fig. 6 is a sectional view taken along the B-B direction of fig. 3.

Fig. 7 is an enlarged view at C in fig. 6.

Reference numerals in the drawings represent respectively:

1. A compensation cabinet; 11. a cabinet body; 12. a ceiling; 13. a heat radiation window; 14. a first rectangular plate; 15. a second rectangular plate; 2. reactive compensation device; 21. a master control room; 22. a fuse; 23. a capacitor; 24. an electric wire; 3. a waterproof device; 31. a wind power generation assembly; 311. a cylinder; 312. a round bar; 313. a generator; 314. a guide plate; 315. a blade; 316. a disc; 317. an electric wire tube; 318. a fixed rod; 32. pushing the reset assembly; 321. an electric push rod; 322. a spring; 33. a rectangular box; 34. a waterproof cover; 35. an electric storage box; 36. a storage battery; 37. a controller; 38. a rain sensor; 4. a cooling device; 41. a water flow channel; 42. a water flow pipe; 43. a water storage tank; 44. a limit opening; 45. a heat dissipation plate; 46. a heat absorbing plate; 47. rectangular blocks.

Detailed Description

In order to make the objects, technical solutions and advantages of the embodiments of the present utility model more clear, the technical solutions of the embodiments of the present utility model will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present utility model. It will be apparent that the described embodiments are some, but not all, embodiments of the utility model. All other embodiments, which can be made by those skilled in the art based on the embodiments of the utility model without making any inventive effort, are intended to be within the scope of the utility model.

The utility model is further described below with reference to examples.

Example 1

Referring to fig. 1-7 of the specification, a low voltage reactive power compensation device for improving voltage quality comprises a compensation cabinet 1,

The compensation cabinet 1 comprises a cabinet body 11, a ceiling 12, heat dissipation windows 13, a first rectangular plate 14 and a second rectangular plate 15, wherein the ceiling 12 is fixedly arranged at the top of the cabinet body 11, the ceiling 12 and the cabinet body 11 are both connected with the waterproof device 3, the heat dissipation windows 13 are fixedly arranged at the left side and the right side of the compensation cabinet 1, and the first rectangular plate 14 and the second rectangular plate 15 are respectively and fixedly arranged in the compensation cabinet 1; the cabinet body 11, the first rectangular plate 14 and the second rectangular plate 15 are all connected with the reactive compensation device 2, and the cooling devices 4 are arranged at the upper end and the lower end of the outer part of the cabinet body 11;

The reactive power compensation device 2 is sequentially installed on the cabinet body 11, the first rectangular plate 14 and the second rectangular plate 15 of the compensation cabinet 1, the cooling device 4 is installed on the cabinet body 11, the waterproof device 3 is installed on the ceiling 12 and the cabinet body 11, and the compensation cabinet 1 starts to work.

The reactive power compensation device 2 for improving voltage quality is arranged on the compensation cabinet 1;

The reactive compensation device 2 comprises a main control room 21, fuses 22, capacitors 23 and electric wires 24, wherein the main control room 21 is fixedly arranged at the upper end of the interior of the cabinet 11, a plurality of groups of fuses 22 are fixedly arranged at the top of the second rectangular plate 15, a plurality of groups of capacitors 23 are fixedly arranged at the top of the first rectangular plate 14, the capacitors 23 are connected with the cooling device 4, and the fuses 22 are respectively electrically connected with the main control room 21 and the capacitors 23 through the electric wires 24;

the upper end of the inside of the cabinet 11 of the main control room 21 of the reactive compensation device 2 is provided with a fuse 22 which is arranged on the second rectangular plate 15, a capacitor 23 which is arranged on the first rectangular plate 14, the main control room 21, the fuse 22 and the capacitor 23 are electrically connected through a wire 24 in sequence, and a switch on the main control room 21 is started to enable the reactive compensation device 2 to operate.

The compensation cabinet 1 is provided with a waterproof device 3 for preventing rainwater from entering;

The waterproof device 3 comprises a wind power generation assembly 31, a pushing reset assembly 32, a rectangular box 33, a waterproof cover 34, an electric storage box 35, a storage battery 36, a controller 37 and a rain sensor 38, wherein the ceiling 12 and the cabinet 11 are both connected with the wind power generation assembly 31, the rectangular box 33 is fixedly installed on the outer walls of the left side and the right side of the cabinet 11 respectively, the electric storage box 35 is fixedly installed on the outer wall of the left side of the cabinet 11, the electric storage box 35 is positioned above the rectangular box 33, the electric storage box 35 and the rectangular box 33 are both connected with the wind power generation assembly 31, the storage battery 36 and the controller 37 are respectively fixedly installed in the electric storage box 35, the storage battery 36 and the controller 37 are electrically connected through a wire 24, the rain sensor 38 is fixedly installed on the top of the ceiling 12, the rain sensor 38 is electrically connected with the controller 37 through the wire 24, the rectangular box 33 is connected with the pushing reset assembly 32, the waterproof cover 34 is connected with the pushing reset assembly 32, and the waterproof cover 34 is in contact with the outer wall of the cabinet 11;

Preferably, the lower end of the waterproof cover 34 and the side close to the cabinet 11 are not closed, and the outer wall of the waterproof cover 34 is provided in a streamline shape;

When wind exists, wind blows the wind power generation assembly 31 of the waterproof device 3, the wind power generation assembly 31 generates electric power, the electric power is transmitted into the storage battery 36 through the electric wire 24, the electric power is stored by the storage battery 36, when the wind falls, the rainwater sensor 38 sends a signal to the controller 37 through the electric wire 24, the controller 37 controls the operation of pushing the reset assembly 32 through the electric wire 24, the reset assembly 32 is pushed to push the waterproof cover 34 to move downwards, the radiating window 13 is shielded, then rainwater can not enter the cabinet 11 through the radiating window 13, when the rain stops, the rainwater sensor 38 does not send a signal to the controller 37, so the controller 37 can push the reset assembly 32 to operate, the spring 322 retracts to drive the waterproof cover 34 to move upwards away from the radiating window 13, compared with the common radiating window 13 without shielding, the wind power generation assembly 31, the reset assembly 32, the rectangular box 33, the waterproof cover 34, the electric storage box 35, the storage battery 36, the controller 37 and the rainwater sensor 38 are mutually matched to effectively cover the window 13 in rainy days, so that the rainwater can not automatically enter the cabinet 11, the rainwater can not enter the cabinet 11, the reactive power is not influenced by the voltage of the waterproof device 2, the reactive power is effectively regulated, and the reactive power of the device is reduced, and the reactive power of the device is controlled, and the reactive power is reduced; the storage battery 36 in the storage box 35 is charged through the wind power generation assembly 31 to push the reset assembly 32 to provide sufficient power, and no power supply equipment is required to be added, so that the use cost is greatly reduced.

The cooling device 4 for cooling the reactive power compensation device 2 is arranged on the compensation cabinet 1.

Example 2

On the basis of embodiment 1 and referring to fig. 1-7, the wind power generation assembly 31 comprises a cylinder 311, a round rod 312, a generator 313, a guide plate 314, blades 315, a disc 316, an electric wire tube 317 and a fixing rod 318, wherein the cylinder 311 is fixedly arranged at the top of the ceiling 12, the round rod 312 is rotationally connected with the cylinder 311, the generator 313 is fixedly arranged at the top of the round rod 312, the disc 316 is rotationally connected with the left end of the generator 313, a plurality of groups of blades 315 are uniformly and fixedly arranged on the disc 316, the fixing rod 318 is fixedly arranged on the generator 313, the guide plate 314 is fixedly arranged on the fixing rod 318, and the cylinder 311, the electric storage box 35 and the rectangular box 33 are respectively connected with the electric wire tube 317;

preferably, the wire tube 317 has a wire 24 mounted therein;

The push reset assembly 32 comprises an electric push rod 321 and a spring 322, the electric push rod 321 is fixedly arranged in the rectangular box 33, the output end of the electric push rod 321 is fixedly connected with the waterproof cover 34, the electric push rod 321 is electrically connected with the electric wire 24, the top of the spring 322 is fixedly connected with the rectangular box 33, and the bottom of the spring 322 is fixedly connected with the waterproof cover 34;

The wind blows the deflector 314 of wind power generation subassembly 31 to rotate, the deflector 314 passes through dead lever 318 and drives the generator 313 and rotate to the direction that wind comes, blade 315 receives the wind to blow and rotates, thereby blade 315 passes through disc 316 and drives the rotation of generator 313 inside electric circle and produce electric power, store in the battery 36 with electric power transmission through electric wire 24, during the rainy day, rain sensor 38 sends the signal to controller 37 through electric wire 24, controller 37 passes through electric wire 24 control and promotes the electric putter 321 of reset subassembly 32 to push down, the output of electric putter 321 drives buckler 34 and moves down and cover heat dissipation window 13, when the rain stops, rain sensor 38 no longer sends the signal to controller 37, then controller 37 stops controlling electric putter 321, the spring 322 atress is retracted this moment, it leaves heat dissipation window 13 to drive buckler 34.

Example 3

On the basis of embodiment 2, referring to fig. 1-7, the cooling device 4 comprises a water flowing groove 41, a water flowing pipe 42, a water storage tank 43, a limiting opening 44, a heat dissipation plate 45, a heat absorption plate 46 and rectangular blocks 47, wherein a plurality of groups of rectangular blocks 47 are uniformly and fixedly arranged on the outer wall of the upper portion of the cabinet body 11, the rectangular blocks 47 are fixedly connected with the water flowing groove 41, the water flowing groove 41 is arranged below the ceiling 12, one end of the water flowing pipe 42 is fixedly connected with the water flowing groove 41, the other end of the water flowing pipe 42 is fixedly connected with the water storage tank 43, the water storage tank 43 is arranged at the lower end of the inner portion of the cabinet body 11 and is positioned below the first rectangular plate 14, the limiting opening 44 is fixedly arranged on the water storage tank 43, the heat absorption plate 46 is in fit connection with the capacitor 23, the heat absorption plate 46 is fixedly connected with the heat dissipation plate 45, and the heat dissipation plate 45 is inserted into the water storage tank 43;

The rainwater on the ceiling 12 is collected through the water flowing groove 41 of the cooling device 4, then the rainwater flows into the water storage tank 43 through the water flowing pipe 42, when the rainwater is almost full of the water storage tank 43, the redundant rainwater is discharged out of the water storage tank 43 through the limit opening 44, after a part of the temperature generated during the working of the capacitor 23 is absorbed by the heat absorbing plate 46, the heat absorbing plate 46 transfers heat to the heat dissipating plate 45, and the heat dissipating plate 45 inserted in the water storage tank 43 performs physical cooling through the rainwater.

The above embodiments are only for illustrating the technical solution of the present utility model, and are not limiting; although the utility model has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical scheme described in the foregoing embodiments can be modified or some technical features thereof can be replaced by equivalents; such modifications and substitutions do not depart from the spirit and scope of the technical solutions of the embodiments of the present utility model.

Claims (10)

1. The utility model provides a low-voltage reactive power compensation device of improvement voltage quality, includes compensation cabinet (1), its characterized in that:

the reactive power compensation device (2) for improving voltage quality is arranged on the compensation cabinet (1);

A cooling device (4) for cooling the reactive power compensation device (2) is arranged on the compensation cabinet (1);

a waterproof device (3) for preventing rainwater from entering is arranged on the compensation cabinet (1);

Waterproof device (3) are including wind power generation subassembly (31), promotion reset subassembly (32), rectangle case (33), buckler (34), electric power storage box (35), battery (36), controller (37) and rain inductor (38), install wind power generation subassembly (31), rectangle case (33), electric power storage box (35) and rain inductor (38) on compensation cabinet (1) respectively, electric power storage box (35) and rectangle case (33) all are connected with wind power generation subassembly (31), fixed mounting is in electric power storage box (35) respectively in battery (36) and controller (37), and is connected through reactive compensation device (2) between battery (36) and the controller (37), rain inductor (38) are connected with promotion reset subassembly (32) through reactive compensation device (2), buckler (34) are connected with promotion reset subassembly (32), buckler (34) are laminated with compensation cabinet (1).

2. The low-voltage reactive power compensation device for improving voltage quality according to claim 1, wherein the compensation cabinet (1) comprises a cabinet body (11), a ceiling (12), a radiating window (13), a first rectangular plate (14) and a second rectangular plate (15), the ceiling (12) is fixedly arranged at the top of the cabinet body (11), a wind power generation assembly (31) and a rain sensor (38) are respectively and fixedly arranged on the ceiling (12), the wind power generation assembly (31), an electric storage box (35) and a rectangular box (33) are respectively and fixedly arranged on the outer wall of the cabinet body (11), the radiating window (13) is fixedly arranged on the left side and the right side of the cabinet body (11), and the first rectangular plate (14) and the second rectangular plate (15) are respectively and fixedly arranged in the cabinet body (11); the cabinet body (11), the first rectangular plate (14) and the second rectangular plate (15) are all connected with the reactive compensation device (2), and the cooling device (4) is installed at the outer upper end and the inner lower end of the cabinet body (11).

3. The low-voltage reactive power compensation device for improving voltage quality according to claim 2, wherein the reactive power compensation device (2) comprises a main control room (21), fuses (22), capacitors (23) and electric wires (24), the main control room (21) is fixedly installed at the upper inner end of a cabinet body (11), a plurality of groups of fuses (22) are fixedly installed at the top of a second rectangular plate (15), a plurality of groups of capacitors (23) are fixedly installed at the top of a first rectangular plate (14), the capacitors (23) are connected with a cooling device (4), and the fuses (22) are respectively electrically connected with the main control room (21) and the capacitors (23) through the electric wires (24).

4. A low voltage reactive power compensation device for improving voltage quality according to claim 3, characterized in that the lower end of the waterproof cover (34) and the side close to the cabinet (11) are not closed, and the outer wall of the waterproof cover (34) is arranged in streamline shape.

5. The low-voltage reactive power compensation device for improving voltage quality according to claim 4, wherein the wind power generation assembly (31) comprises a cylinder (311), a round rod (312), a generator (313), a guide plate (314), blades (315), a disc (316), an electric wire tube (317) and a fixing rod (318), the cylinder (311) is fixedly installed at the top of a ceiling (12), the round rod (312) is rotationally connected with the cylinder (311), the generator (313) is fixedly installed at the top of the round rod (312), the disc (316) is rotationally connected with the left end of the generator (313), a plurality of groups of blades (315) are uniformly and fixedly installed on the disc (316), the fixing rod (318) is fixedly installed on the generator (313), and the guide plate (314) is fixedly installed on the fixing rod (318).

6. The low-voltage reactive power compensation device for improving voltage quality according to claim 5, wherein the electric wire tube (317) is fixedly connected with a cylinder (311), an electric storage box (35) and a rectangular box (33), respectively.

7. The low voltage reactive power compensation device of claim 6, wherein wires (24) are installed within the wire conduit (317).

8. The low-voltage reactive power compensation device for improving voltage quality according to claim 7, wherein the push reset assembly (32) comprises an electric push rod (321) and a spring (322), the electric push rod (321) is fixedly installed inside a rectangular box (33), an output end of the electric push rod (321) is fixedly connected with a waterproof cover (34), the electric push rod (321) is electrically connected with an electric wire (24), the top of the spring (322) is fixedly connected with the rectangular box (33), and the bottom of the spring (322) is fixedly connected with the waterproof cover (34).

9. The low-voltage reactive power compensation device for improving voltage quality according to claim 8, wherein the cooling device (4) comprises a water flowing groove (41), a water flowing pipe (42), a water storage tank (43), a limiting opening (44), a heat radiating plate (45), a heat absorbing plate (46) and rectangular blocks (47), wherein a plurality of groups of rectangular blocks (47) are uniformly and fixedly arranged on the outer wall of the upper portion of the cabinet body (11), the rectangular blocks (47) are fixedly connected with the water flowing groove (41), the water flowing groove (41) is arranged below a ceiling (12), one end of the water flowing pipe (42) is fixedly connected with the water flowing groove (41), the other end of the water flowing pipe (42) is fixedly connected with the water storage tank (43), the limiting opening (44) is fixedly arranged on the water storage tank (43), the heat absorbing plate (46) is in fit connection with a capacitor (23), the heat absorbing plate (46) is fixedly connected with the heat radiating plate (45), and the heat radiating plate (45) is inserted into the water storage tank (43).

10. The low voltage reactive power compensation device for improving voltage quality according to claim 9, characterized in that the water reservoir (43) is mounted at the inner lower end of the cabinet (11) below the first rectangular plate (14).