Relay protection device of booster station of photovoltaic power plant

Abstract

The invention discloses a relay protection device for a booster station of a photovoltaic power plant, and relates to the technical field of relay protection devices, the relay protection device comprises an outer box, a fan, a relay protection device, a relay protection device, a relay protection device, a relay protection device and a relay protection device, and the fan is communicated with the side part of the outer box; and the filtering mechanism comprises a side box fixedly connected to the side portion of the outer box, the side box communicates with the input end of the draught fan, a mounting shell is slidably connected to the interior of the side box, the top of the mounting shell communicates with a bent pipe, and the side portion of the mounting shell is provided with an air vent communicating with the interior of the side box. By arranging the filtering mechanism, dust accumulated on the filter is removed through vibration, meanwhile, vibration is conducted to the storage box and the porous shell, dispersion and replacement of a drying agent are promoted, the drying agent in the porous shell is filled, and the drying effect is improved; and a grating structure is arranged, when the particle drying agent passes through a grating, the grating vibrates to form a scattering effect on the drying agent, uniform feeding and discharging of the drying agent are facilitated, and different driving devices do not need to be additionally arranged.

Description

Technical Field

[0001] The present invention relates to the technical field of relay protection devices, and particularly to a relay protection device for a booster station of a photovoltaic power plant. Background Art

[0002] Smart grid is a highly digitalized, automated and interconnected power network. By integrating advanced information technology, communication technology and sensor technology, it realizes efficient production, transmission, distribution and consumption of electric power. Photovoltaic power plants generate electricity using solar energy, reduce the use of fossil energy, and effectively reduce carbon emissions, which is of great significance for promoting energy conservation and emission reduction. Photovoltaic power plants are an important part of the smart grid system, and the booster station of a photovoltaic power plant is an indispensable core part of the photovoltaic power plant. The booster station of a photovoltaic power plant is usually located in an area with flat and open terrain and low vegetation coverage. Due to the lack of vegetation coverage in such an environment, the sand fixation ability is significantly insufficient. Its typical characteristics are bare ground surface, high wind speed and frequent sand dust activities. Especially in arid and semi-arid climate regions or in seasons with frequent sandstorms, the sand dust concentration is relatively high, which easily affects the normal use of the relay protection device in the booster station of the photovoltaic power plant. Dust is easy to clog, affecting ventilation and heat dissipation, and staff need to clean it manually frequently. Due to the relatively high sand dust concentration, the replacement frequency is also relatively fast, increasing the workload of the staff.

[0003] In the prior art, by arranging a vibrating plate on one side of the drying box, the desiccant can be shaken loose for easy discharge, and by installing a vibrator at one end of the fine filter screen, the fine filter screen can be shaken. In these two ways, it is impossible to remove the sand dust on the filter screen while shaking loose the desiccant, and different driving devices need to be set up additionally, increasing the cost, and there is a lack of dissipation of vibration energy, which easily causes the vibration to affect the electrical components inside the relay protection device; using an electric sliding table to drive a cleaning brush to move back and forth to clean the dust-proof net, avoiding heat being unable to be discharged due to dust clogging the dust-proof net. In this way, it is impossible to remove the moisture in the air by vibrating and compacting the desiccant while removing the dust on the dust-proof net, and the moisture easily affects the electrical components inside the relay protection device. Summary of the Invention

[0004] The purpose of the present invention is to solve the problem in the prior art that it is impossible to remove the sand dust on the filter screen while shaking loose the desiccant, different driving devices need to be set up additionally, increasing the cost, and there is a lack of dissipation of vibration energy, which easily causes the vibration to affect the electrical components inside the relay protection device, and a relay protection device for a booster station of a photovoltaic power plant is proposed.

[0005] To achieve the above purpose, the present invention adopts the following technical scheme: A relay protection device for a booster station of a photovoltaic power plant, including an outer box, a relay protection instrument is installed inside the outer box, and further includes:

[0006] A blower, which is connected to the side of the outer box;

[0007] A filtering mechanism, which includes a side box fixedly connected to the side of the outer box. The side box is communicated with the input end of the blower. An installation shell is slidably connected inside the side box. A bent pipe is communicated with the top of the installation shell, and a ventilation port communicated with the inside of the side box is opened on the side. The top of the bent pipe penetrates through the top of the side box in a sealed manner. A vibration component, a filter and a porous shell are connected inside the installation shell. A desiccant is contained inside the porous shell. A feeding component is connected to the top of the porous shell, and a discharging component is connected to the bottom. The filter and the porous shell are sequentially located between the bent pipe and the ventilation port;

[0008] A protection mechanism, which includes two fixing plates fixedly connected inside the side box. The installation shell is located between the two fixing plates. First springs are fixedly connected between the two fixing plates and the installation shell respectively. A damping rod is fixedly connected between the upper fixing plate and the installation shell, and a third spring is fixedly connected between the lower fixing plate and the installation shell.

[0009] In the above-mentioned relay protection device of the photovoltaic power plant step-up substation, heat dissipation fins are fixedly connected to the side of the relay protection instrument, and an air outlet pipe is communicated with the side of the outer box away from the blower.

[0010] In the above-mentioned relay protection device of the photovoltaic power plant step-up substation, the bent pipe is sequentially composed of a first pipe section, a second pipe section and a third pipe section in communication. The top of the first pipe section penetrates through the top of the side box in a sealed manner. The second pipe section is wavy. The bottom end of the third pipe section is in sealed sliding fit with the top of the installation shell in a penetrating manner. A plurality of air outlet holes are opened on the part of the third pipe section extending into the installation shell, and the air outlet holes are communicated with the inside of the installation shell. A pipe groove for the movement of the third pipe section is opened on the upper fixing plate.

[0011] In the above-mentioned relay protection device of the photovoltaic power plant step-up substation, a scraping mechanism is further included. The scraping mechanism includes a motor screw moving part installed on the top of the side box. The output end of the motor screw moving part is fixedly connected with a scraper. One end of the scraper away from the motor screw moving part passes through the first pipe section and is slidably matched with the inside of the second pipe section. A collecting component is communicated with the side of the second pipe section. An outer box is fixedly connected to the top of the side box. The motor screw moving part is located inside the outer box, and a strip-shaped groove for the movement of the output end of the motor screw moving part is opened on the outer box.

[0012] In the relay protection device of the above-mentioned step-up substation of a photovoltaic power plant, the collection component includes a support plate fixedly connected to the upper fixing plate above. A collection box is fixedly connected to the support plate. A connecting plate is fixedly connected inside the collection box, and the side part is communicated with the side part of the second pipe section. One side of the connecting plate close to the second pipe section is fixedly connected with a plurality of second springs. One end of the plurality of second springs away from the connecting plate is fixedly connected to the same partition plate. One side of the partition plate away from the second spring is fixedly connected with a plurality of T-shaped rods. The partition plate is hermetically and slidably connected to the communication port between the second pipe section and the collection box. When the motor screw moving part works, the scraping plate pushes the partition plate into the interior of the collection box through the T-shaped rods. A closing plate is installed on the side part of the side box, and the closing plate is located at the collection box.

[0013] In the relay protection device of the above-mentioned step-up substation of a photovoltaic power plant, the vibration component includes a limiting plate fixedly connected to the inner top of the installation shell. A knocking part is installed inside the limiting plate. When the knocking part works, its output end continuously knocks on the top of the filter.

[0014] The filter includes a fixed frame slidably connected to the bottom of the limiting plate. A plurality of dust filtering nets are fixedly connected inside the fixed frame.

[0015] A plurality of air permeation holes are penetrated on the surface of the porous shell, and the diameter of the air permeation holes is smaller than the diameter of the desiccant particles.

[0016] In the relay protection device of the above-mentioned step-up substation of a photovoltaic power plant, a partition plate is fixedly connected to the bottom of the fixed frame. The partition plate is fixedly connected inside the installation shell and divides the interior of the installation shell into upper and lower two spaces. A driving part is installed on the side part of the installation shell. The output end of the driving part is fixedly connected with a transmission rod. A plurality of rotating grooves are penetrated on the partition plate. A rotating plate is hermetically rotatably connected in the rotating groove. One end of the transmission rod away from the driving part hermetically penetrates the installation shell and the partition plate and is connected with a plurality of rotating plates through a transmission structure. When the driving part works, it drives a plurality of rotating plates to rotate downward through the transmission rod and the transmission structure. The plurality of rotating plates are located below the fixed frame, and the bottom of the fixed frame is penetrated.

[0017] In the relay protection device of the booster station of the above-mentioned photovoltaic power plant, both the feeding assembly and the discharging assembly include a grid structure connected to the side of the installation shell. The two grid structures are correspondingly located at the top and bottom of the porous shell. The grid mechanism includes an electric telescopic rod installed on the side of the installation shell. The output end of the electric telescopic rod penetrates through the installation shell and is fixedly connected with a blocking plate. One end of the blocking plate away from the electric telescopic rod is hermetically penetrated and slidably connected with a connecting shell. The two connecting shells are correspondingly communicated with the top and bottom of the porous shell. One side of the blocking plate extending out of the connecting shell is fixedly connected with a plurality of fixing strips. The desiccant is located inside the porous shell between the two blocking plates. The feeding assembly further includes a storage box fixedly connected to the inner top of the installation shell. The bottom of the storage box is communicated with the top of the upper connecting shell, and a feeding pipe is communicated with the side. One end of the feeding pipe away from the storage box hermetically penetrates through the installation shell and is fixedly connected with a sealing plug. The bottom of the lower connecting shell penetrates through the partition plate and is communicated with the lower space of the installation shell.

[0018] In the relay protection device of the booster station of the above-mentioned photovoltaic power plant, a pressure sensor is installed on the third spring, and a gas generating part is installed at the bottom inside the side box. Both the pressure sensor and the gas generating part are electrically connected to a controller, and the controller is installed on the side box. The output end of the gas generating part is communicated with a connecting pipe. One end of the connecting pipe away from the gas generating part hermetically penetrates through the side wall of the outer box and is communicated with a first airbag. The first airbag is located on both sides of the relay protection instrument. The controller receives the signal of the pressure sensor to control the working state of the gas generating part. A U-shaped mounting plate is fixedly connected between the first airbag and the inner wall of the outer box.

[0019] In the relay protection device of the booster station of the above-mentioned photovoltaic power plant, a vibration trigger assembly is further included. The vibration trigger assembly includes a T-shaped connecting rod slidably connected through the lower fixing plate. A small spring is fixedly connected between the top of the T-shaped connecting rod and the top of the fixing plate. A trigger switch is installed on the top of the gas generating part, and the bottom end of the T-shaped connecting rod is located above the trigger switch.

[0020] Compared with the existing technology, the advantages of the present invention are as follows:

[0021] 1. In the present invention, a fan is used to make the gas flow on the outer surface of the relay protection instrument, realizing the heat dissipation of the relay protection instrument, maintaining the stable use of the booster station of the photovoltaic power plant in the smart grid system. By setting a filtering mechanism, when the vibrator works, the dust accumulated on the filter is removed by vibration. At the same time, the vibration is conducted to the storage box and the porous shell, promoting the dispersion and replacement of the desiccant, filling the desiccant in the porous shell tightly, and improving the drying effect. And by setting a grid structure, when the granular desiccant passes through the grid, the grid vibrates to form a dispersing effect on the desiccant, facilitating the uniform feeding and discharging of the desiccant, without the need to set up different driving devices additionally, reducing the cost.

[0022] 2. The present invention dissipates vibration energy by setting a protection mechanism, enabling the installation housing to move up and down through a spring structure, and dissipating the vibration energy through the friction between the installation housing and the side box, effectively reducing the vibration conducted from the installation housing to the outer box and reducing the impact of vibration on the relay protection instrument. At the same time, when the installation housing vibrates due to external forces such as an earthquake, the vibration amplitude is monitored by a pressure sensor. When the vibration amplitude is too large, the gas generating part is controlled to quickly inflate the first airbag, and the first airbag expands to fix and protect the relay protection instrument, reducing the damage suffered by the relay protection instrument. The vibration state of the installation housing during the operation of the vibrator is monitored by the pressure sensor to complete the monitoring of the filtering mechanism, which can promptly detect when the filtering mechanism fails and ensure the normal operation of the filtering mechanism.

[0023] 3. The present invention sets a vibration trigger component. When the pressure sensor fails and the vibration amplitude of the installation housing is too large, the vibration trigger component is directly pushed to trigger the gas generating part, ensuring the stable operation of the first airbag. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 It is a schematic diagram of the overall structure of a relay protection device for a step-up substation of a photovoltaic power plant proposed by the present invention;

[0025] Figure 2 It is a schematic diagram of the split structure of the outer box and the side box of a relay protection device for a step-up substation of a photovoltaic power plant proposed by the present invention;

[0026] Figure 3 It is a cross-sectional view of the outer box structure of a relay protection device for a step-up substation of a photovoltaic power plant proposed by the present invention;

[0027] Figure 4 It is a schematic diagram of the side box structure of a relay protection device for a step-up substation of a photovoltaic power plant proposed by the present invention;

[0028] Figure 5 It is a schematic diagram of the split structure of the side box and the outer box of a relay protection device for a step-up substation of a photovoltaic power plant proposed by the present invention;

[0029] Figure 6 It is a schematic diagram of the internal structure of the side box of a relay protection device for a step-up substation of a photovoltaic power plant proposed by the present invention;

[0030] Figure 7 It is a plan view of the installation housing and the first spring structure of a relay protection device for a step-up substation of a photovoltaic power plant proposed by the present invention;

[0031] Figure 8 It is a schematic diagram of the split structure of the elbow pipe, the partition plate and the collection box of a relay protection device for a step-up substation of a photovoltaic power plant proposed by the present invention;

[0032] Figure 9Schematic diagram of the split structure of the scraper, partition plate and collection box of the relay protection device for the booster station of a photovoltaic power plant proposed by the present invention;

[0033] Figure 10 Cross-sectional view of the installation housing and fixed plate structure of the relay protection device for the booster station of a photovoltaic power plant proposed by the present invention;

[0034] Figure 11 Schematic diagram of the knocking part and limiting plate structure of the relay protection device for the booster station of a photovoltaic power plant proposed by the present invention;

[0035] Figure 12 Schematic diagram of the partition plate and rotating plate structure of the relay protection device for the booster station of a photovoltaic power plant proposed by the present invention;

[0036] Figure 13 Schematic diagram of the connection housing and blocking plate structure of the relay protection device for the booster station of a photovoltaic power plant proposed by the present invention.

[0037] In the figure: 1 outer box, 2 side box, 3 outer box, 4 installation housing, 5 elbow, 51 first pipe section, 52 second pipe section, 53 third pipe section, 6 fan, 7 relay protection instrument, 8 heat dissipation fins, 9 U-shaped mounting plate, 10 first airbag, 11 support plate, 12 collection box, 13 fixed plate, 14 first spring, 15 connecting pipe, 16 motor screw moving part, 17 gas generating part, 18 vibration trigger assembly, 19 scraper, 20 connecting plate, 21 partition plate, 22 T-shaped rod, 23 second spring, 24 partition board, 25 filter, 26 storage box, 27 pressure sensor, 28 third spring, 29 electric telescopic rod, 30 porous housing, 31 limiting plate, 32 knocking part, 33 rotating plate, 34 transmission rod, 35 driving part, 36 connection housing, 37 feed pipe, 38 blocking plate, 39 fixing strip. Detailed implementation manners

[0038] The following embodiments are only for illustrative purposes and are not intended to limit the scope of the present invention.

[0039] Refer to Figures 1 - 3 , a relay protection device for the booster station of a photovoltaic power plant, including an outer box 1, a box door is installed on the front of the outer box 1, a relay protection instrument 7 is installed inside the outer box 1, a heat dissipation fin 8 is fixedly connected to the side of the relay protection instrument 7, and further includes:

[0040] The relay protection function for the booster station of the photovoltaic power plant can be realized through the relay protection instrument 7.

[0041] The heat of the relay protection instrument 7 can be conducted to the heat dissipation fins 8 for convenient heat dissipation.

[0042] The fan 6 is connected to the side of the outer box 1, and an air outlet pipe is connected to the side of the outer box 1 away from the fan 6.

[0043] Refer to Figure 4 Figure, the filtering mechanism, the filtering mechanism includes a side box 2 fixedly connected to the side of the outer box 1, the side box 2 is communicated with the input end of the fan 6, an installation shell 4 is slidably connected inside the side box 2, a bent pipe 5 is communicated with the top of the installation shell 4, and an air vent communicating with the inside of the side box 2 is arranged on the side. The top end of the bent pipe 5 penetrates through the top of the side box 2 in a sealed manner. A vibration component, a filter 25 and a porous shell 30 are connected inside the installation shell 4. A desiccant is contained inside the porous shell 30. A feeding component is connected to the top of the porous shell 30, and a discharging component is connected to the bottom. The filter 25 and the porous shell 30 are sequentially located between the bent pipe 5 and the air vent.

[0044] Refer to Figure 8 Figure, the bent pipe 5 is composed of a first pipe section 51, a second pipe section 52 and a third pipe section 53 which are sequentially communicated. The top end of the first pipe section 51 penetrates through the top of the side box 2 in a sealed manner. The second pipe section 52 is in a wavy shape. The bottom end of the third pipe section 53 is in sealed sliding fit with the top of the installation shell 4. A plurality of air outlet holes are arranged on the part of the third pipe section 53 extending into the installation shell 4. The air outlet holes are communicated with the inside of the installation shell 4. A pipe groove for the movement of the third pipe section 53 is arranged on the upper fixing plate 13.

[0045] Refer to Figure 5 , Figure 6 , Figure 8 and Figure 9 Figure, it further includes a scraping mechanism. The scraping mechanism includes a motor screw moving part 16 installed on the top of the side box 2. The output end of the motor screw moving part 16 is fixedly connected with a scraper 19. One end of the scraper 19 away from the motor screw moving part 16 passes through the first pipe section 51 and is slidably matched with the inside of the second pipe section 52. A collecting component is communicated with the side of the second pipe section 52. An outer box 3 is fixedly connected to the top of the side box 2. The motor screw moving part 16 is located inside the outer box 3. A strip-shaped groove for the movement of the output end of the motor screw moving part 16 is arranged on the outer box 3.

[0046] The collecting component includes a support plate 11 fixedly connected to the upper fixing plate 13. A collecting box 12 is fixedly connected to the support plate 11. A connecting plate 20 is fixedly connected to the inside of the collecting box 12 and is communicated with the side of the second pipe section 52. A plurality of second springs 23 are fixedly connected to one side of the connecting plate 20 close to the second pipe section 52. One end of the plurality of second springs 23 away from the connecting plate 20 is fixedly connected to the same partition plate 21. A plurality of T-shaped rods 22 are fixedly connected to one side of the partition plate 21 away from the second springs 23. The partition plate 21 is slidably connected in a sealed manner at the communication port of the second pipe section 52 and the collecting box 12. When the motor screw moving part 16 works, the scraper 19 pushes the partition plate 21 into the inside of the collecting box 12 through the T-shaped rods 22. A closing plate is installed on the side of the side box 2 and is located at the collecting box 12.

[0047] A prolonging plate is fixedly connected to the side of the collection box 12. The prolonging plate is located below the collection box 12 and the second pipe section 52, and is slidably matched with the partition plate 21 to prevent dust from leaking through the gap between the collection box 12 and the second pipe section 52.

[0048] The vibration assembly includes a limiting plate 31 fixedly connected to the inner top of the installation housing 4. A knocking part 32 is installed inside the limiting plate 31. When the knocking part 32 works, its output end continuously knocks the top of the filter 25.

[0049] The knocking part 32 adopts a linear vibrator in the prior art. When it works, its output end continuously knocks the top of the filter 25 in the vertical direction.

[0050] The filter 25 includes a fixed frame slidably connected to the bottom of the limiting plate 31. A plurality of dust-filtering nets are fixedly connected inside the fixed frame, and the dust in the air is filtered through the dust-filtering nets.

[0051] A plurality of air-permeable holes are formed through the surface of the porous housing 30. The diameter of the air-permeable holes is smaller than the diameter of the desiccant particles to prevent the granular desiccant from leaking out.

[0052] Referring to Figure 12 , a partition plate 24 is fixedly connected to the bottom of the fixed frame. The partition plate 24 is fixedly connected inside the installation housing 4, and divides the interior of the installation housing 4 into upper and lower spaces. A driving part 35 is installed on the side of the installation housing 4. The output end of the driving part 35 is fixedly connected to a transmission rod 34. A plurality of rotating grooves are formed through the partition plate 24. A rotating plate 33 is hermetically rotatably connected inside the rotating grooves. One end of the transmission rod 34 away from the driving part 35 hermetically penetrates through the installation housing 4 and the partition plate 24, and is connected to a plurality of rotating plates 33 through a transmission structure. When the driving part 35 works, it drives a plurality of rotating plates 33 to rotate downward through the transmission rod 34 and the transmission structure. A plurality of rotating plates 33 are located below the fixed frame, and the bottom of the fixed frame is penetrated.

[0053] A rubber layer is arranged at the lower end of the filter 25, and the gap between the filter 25 and the multiple groups of rotating plates 33 can be sealed through the rubber layer to prevent air from leaking through the gap when filtering air.

[0054] The transmission structure adopts a toothed belt and toothed shaft structure in the prior art. When it works, it drives a plurality of rotating plates 33 to rotate synchronously.

[0055] Referring to Figure 11 and 13, both the feeding component and the discharging component include grid structures connected to the side of the installation housing 4. The two grid structures are correspondingly located at the top and bottom of the porous housing 30. The grid mechanism includes an electric telescopic rod 29 installed on the side of the installation housing 4. The output end of the electric telescopic rod 29 penetrates through the installation housing 4 and is fixedly connected with a blocking plate 38. One end of the blocking plate 38 far away from the electric telescopic rod 29 is hermetically penetrated and slidably connected with a connecting housing 36. The two connecting housings 36 are correspondingly communicated with the top and bottom of the porous housing 30. On one side of the blocking plate 38 extending out of the connecting housing 36, a plurality of fixing strips 39 are fixedly connected. The desiccant is located inside the porous housing 30 between the two blocking plates 38. The feeding component further includes a storage box 26 fixedly connected to the inner top of the installation housing 4. The bottom of the storage box 26 is communicated with the top of the upper connecting housing 36, and a feed pipe 37 is communicated with the side. One end of the feed pipe 37 far away from the storage box 26 penetrates through the installation housing 4 hermetically and is fixedly connected with a sealing plug. The bottom of the lower connecting housing 36 penetrates through the partition plate 24 and is communicated with the lower space of the installation housing 4.

[0056] The plurality of fixing strips 39 form a grid. When the granular desiccant passes through the grid, the grid vibrates, forming a dispersing effect on the desiccant, which is convenient for the uniform feeding and discharging of the desiccant.

[0057] Refer to Figure 7 and Figure 10 , a protection mechanism. The protection mechanism includes two fixing plates 13 fixedly connected inside the side box 2. The installation housing 4 is located between the two fixing plates 13. A first spring 14 is fixedly connected between each of the two fixing plates 13 and the installation housing 4. A damping rod is fixedly connected between the upper fixing plate 13 and the installation housing 4. A third spring 28 is fixedly connected between the lower fixing plate 13 and the installation housing 4. A pressure sensor 27 is installed on the third spring 28. A gas generating part 17 is installed at the bottom inside the side box 2. Both the pressure sensor 27 and the gas generating part 17 are electrically connected to a controller. The controller is installed on the side box 2. The output end of the gas generating part 17 is communicated with a connecting pipe 15. One end of the connecting pipe 15 far away from the gas generating part 17 penetrates through the side wall of the outer box 1 hermetically and is communicated with a first airbag 10. The first airbag 10 is located on both sides of the relay protection instrument 7.

[0058] The gas generating part 17 adopts the existing technology and has an igniter inside, which is used to ignite the sodium azide inside, so as to quickly generate nitrogen gas for inflation and subsequent protection effects.

[0059] The controller receives the signal of the pressure sensor 27 to control the working state of the gas generating part 17. A U-shaped mounting plate 9 is fixedly connected between the first airbag 10 and the inner wall of the outer box 1.

[0060] It also includes a vibration trigger component, which includes a T-shaped connecting rod that is slidably connected to the lower fixed plate 13, a small spring is fixedly connected between the top of the T-shaped connecting rod and the top of the fixed plate 13, a trigger switch is installed on the top of the gas generating part 17, and the bottom end of the T-shaped connecting rod is located above the trigger switch.

[0061] When the present invention is in use, a temperature detector is provided inside the relay protection device 7. When the temperature of the relay protection device 7 exceeds a preset threshold value, the fan 6 starts working, and its input end draws the air inside the side box 2 into the inside of the outer box 1. The gas flows between multiple groups of heat dissipation fins 8 and is finally discharged through the air outlet pipe, thereby achieving heat dissipation for the relay protection device 7 and avoiding the relay protection device 7 from having an excessively high temperature, so that the relay protection device 7 can be used normally in the photovoltaic power plant booster station, thereby maintaining the stability of the smart grid system.

[0062] When the fan 6 starts to exhaust air, external air enters the interior of the mounting shell 4 through the curved pipe 5. The curved pipe 5 is composed of a first pipe section 51, a second pipe section 52 and a third pipe section 53, wherein the second pipe section 52 is configured to be wavy. When the dust-laden air passes through the wavy second pipe section 52, due to the inertia of the air fluid, larger dust particles will be subjected to a stronger centrifugal force, thereby being thrown to the inner wall of the curved pipe 5 and deposited. At the same time, the air flow rate will change at the curved pipe 5, especially in the area close to the inner wall, where the flow rate will be relatively slow. This reduction in flow rate is conducive to the deposition of large dust particles.

[0063] When the dust-laden air passes through the curved pipe 5, most of the large dust particles in the air can be deposited in the second pipe section 52, thereby separating most of the large dust particles from the air and reducing damage to the filter 25 during subsequent filtration. The third pipe section 53 extends into the position inside the mounting shell 4 and is provided with multiple groups of air outlet holes. Through the multiple groups of air outlet holes, the air can contact the filter 25 more evenly, thereby improving the utilization rate of the filter 25.

[0064] The air entering the installation shell 4 first passes through the multiple groups of dust filters in the filter 25, and then passes through the air holes on the surface of the porous shell 30 to contact the granular desiccant inside it. Therefore, when the air passes through the filter 25 and the porous shell 30, the dust and moisture contained in the air can be removed at one time, and then the clean and dry air can enter the outer box 1, thereby preventing the dust and moisture in the air from affecting the normal operation of the relay protection device 7, and further maintaining the stability of the smart grid system.

[0065] After being used for a period of time, a certain amount of dust will accumulate inside the second pipe section 52 and on the surface of the filter 25, which will reduce the effect of filtering the air. At this time, the motor screw moving part 16 is started, and its output end drives the scraper 19 to move, so as to scrape the dust accumulated inside the second pipe section 52. When the scraper 19 moves, it squeezes the T-bar 22 to move the partition plate 21 toward the inside of the collection box 12, pushing the dust into the collection box 12, and then the scraper 19 is reset. The partition plate 21 is also reset by the elastic force of the second spring 23, so that the second pipe section 52 can be automatically cleaned.

[0066] The closing plate on one side of the side box 2 is removed, and the support plate 11 is separated from the collection box 12 to facilitate cleaning of the collection box 12 .

[0067] At the same time, the driving part 35 works, driving the multiple rotating plates 33 to rotate downward through the transmission rod 34 and the transmission structure, opening the rotating groove, so that the dust at the bottom of the filter 25 can fall into the lower space of the installation shell 4 through the rotating groove.

[0068] When the rotating groove is turned on, the knocking part 32 works and continuously knocks the upper end of the filter 25, so that the filter 25 continuously vibrates, shaking off the dust on the dust filter net, and the dust falls from the turned-on rotating groove into the lower space of the mounting shell 4, thereby realizing automatic cleaning of the filter 25.

[0069] At the same time, the vibration of the filter 25 can be transmitted to the rotating plate 33 and the mounting shell 4. The vibration can reduce the adhesion between the dust and the rotating plate 33, thereby improving the cleaning effect.

[0070] After being used for a period of time, the granular desiccant inside the porous shell 30 needs to be replaced. The replacement operation is set during the vibration cleaning process of the filter 25. The electric telescopic rod 29 is started, and its output end is contracted to pull the blocking plate 38 and the fixing bar 39 to move, so that the blocking plate 38 is moved out of the interior of the connecting shell 36, and multiple fixing bars 39 are moved to the interior of the connecting shell 36. At this time, the granular desiccant inside the porous shell 30 can pass through the gaps between the multiple groups of fixing bars 39 below and fall into the lower space of the installation shell 4. Through the setting of the fixing bars 39 and the assistance of vibration, the granular desiccant inside the porous shell 30 can be shaken apart, thereby preventing the granular desiccant from accumulating into blocks, so that the granular desiccant inside the installation shell 4 can be placed more efficiently, which is convenient for storing more granular desiccant.

[0071] Subsequently, the connecting shell 36 at the lower end of the porous shell 30 is closed, and the connecting shell 36 at the upper end is opened, so that the granular desiccant inside the storage box 26 can enter the inside of the porous shell 30. Subsequently, the connecting shell 36 at the upper end is closed, enabling automatic replacement of the granular desiccant without manual operation. Through vibration, not only can it promote the dropping of the granular desiccant in the storage box 26, but also it can compact the granular desiccant inside the porous shell 30, reduce dead corners, and improve the drying effect.

[0072] When the vibration is transmitted to the mounting shell 4, under the elastic force of the first spring 14, the mounting shell 4 continuously slides on the inner wall of the side box 2. The vibration energy can be dissipated through the friction energy consumption between the mounting shell 4 and the side box 2 and the viscous energy consumption of the damping rod, reducing the impact force directly transmitted to the side box 2. At the same time, the vibration transmitted from the mounting shell 4 to the outer box 2 is also effectively reduced, thereby being able to reduce the impact of vibration on the relay protection instrument 7. The combined use of the above-mentioned first spring 14 and damping rod is a mature existing technology.

[0073] When an earthquake occurs, the amplitude of the mounting shell 4 will increase, and the extrusion force on the third spring 28 will increase. When the force received by the pressure sensor 27 exceeds the threshold value, the controller operates, and the sodium azide inside the gas generating part 17 is ignited by the igniter. The rapidly generated nitrogen can support the two groups of first airbags 10 through the connecting pipe 15. After the first airbags 10 are inflated and expanded, the fixing effect of the relay protection instrument 7 is strengthened, and the vibration received by the relay protection instrument 7 is buffered, thereby reducing the damage received by the relay protection instrument 7.

[0074] At the same time, when a fire breaks out in the relay protection instrument 7 due to an earthquake, the nitrogen inside the first airbag 10 will overflow as the first airbag 10 is burned, reducing the oxygen concentration around the relay protection instrument 7 and being able to inhibit the fire to a certain extent.

[0075] When the pressure sensor 27 fails, when the amplitude of the mounting shell 4 is too large, the bottom of the mounting shell 4 will contact the T-shaped connecting rod, pushing the T-shaped connecting rod to move downward, hitting the trigger switch, directly starting the igniter, making the gas generating part 17 work, ensuring the rapid generation of nitrogen, and enabling the first airbag 10 to work properly.

[0076] The above are only the preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principles of the present invention shall be included within the protection scope of the present invention.

Claims

1. A relay protection device for a step-up substation of a photovoltaic power plant, including an outer box, and a relay protection instrument is installed inside the outer box. It is characterized in that, It further includes: A fan, which is connected to the side of the outer box; A filtering mechanism, which includes a side box fixedly connected to the side of the outer box. The side box is connected to the input end of the fan. An installation shell is slidably connected inside the side box. A bent pipe is connected to the top of the installation shell, and an air vent communicating with the inside of the side box is provided on the side. The top end of the bent pipe penetrates through the top of the side box in a sealed manner. A vibration component, a filter, and a porous shell are connected inside the installation shell. A desiccant is contained inside the porous shell. A feeding component is connected to the top of the porous shell, and a discharging component is connected to the bottom. The filter and the porous shell are sequentially located between the bent pipe and the air vent; A protection mechanism, which includes two fixed plates fixedly connected inside the side box. The installation shell is located between the two fixed plates. First springs are fixedly connected between the two fixed plates and the installation shell respectively. A damping rod is fixedly connected between the upper fixed plate and the installation shell, and a third spring is fixedly connected between the lower fixed plate and the installation shell.

2. The relay protection device for the booster station of the photovoltaic power plant according to claim 1, characterized in that, Radiating fins are fixedly connected to the side of the relay protection instrument, and an air outlet pipe is connected to the side of the outer box away from the fan.

3. The relay protection device of the booster station of the photovoltaic power plant according to claim 1, characterized in that, The bent pipe is sequentially composed of a first pipe section, a second pipe section, and a third pipe section connected in series. The top end of the first pipe section penetrates through the top of the side box in a sealed manner. The second pipe section is in a wavy shape. The bottom end of the third pipe section is in sealed sliding fit with the top of the installation shell. A plurality of air outlet holes are provided on the part of the third pipe section extending into the installation shell, and the air outlet holes communicate with the inside of the installation shell. A pipe groove for the movement of the third pipe section is provided on the upper fixed plate.

4. The relay protection device of the booster station of the photovoltaic power plant according to claim 3, characterized in that, It further includes a scraping mechanism, which includes a motor screw moving part installed on the top of the side box. The output end of the motor screw moving part is fixedly connected with a scraper. One end of the scraper away from the motor screw moving part passes through the first pipe section and is slidably matched with the inside of the second pipe section. A collecting component is connected to the side of the second pipe section. An outer box is fixedly connected to the top of the side box. The motor screw moving part is located inside the outer box, and a strip-shaped groove for the movement of the output end of the motor screw moving part is provided on the outer box.

5. The relay protection device of the booster station of the photovoltaic power plant according to claim 4, characterized in that, The collecting component includes a support plate fixedly connected to the upper fixed plate. A collecting box is fixedly connected to the support plate. A connecting plate is fixedly connected inside the collecting box and is connected to the side of the second pipe section. A plurality of second springs are fixedly connected to one side of the connecting plate close to the second pipe section. The other ends of the plurality of second springs are fixedly connected to the same partition plate. The partition plate is fixedly connected to the side away from the second springs. A plurality of T-shaped rods are fixedly connected to the side of the partition plate away from the second springs. The partition plate is slidably connected in a sealed manner at the communication port between the second pipe section and the collecting box. When the motor screw moving part works, the scraper pushes the partition plate into the inside of the collecting box through the T-shaped rods. A closing plate is installed on the side of the side box and is located at the collecting box.

6. The relay protection device of the booster station of the photovoltaic power plant according to claim 1, wherein, The vibration component includes a limiting plate fixedly connected to the inner top of the installation shell. A knocking part is installed inside the limiting plate. When the knocking part works, its output end continuously knocks on the top of the filter; The filter includes a fixed frame slidably connected to the bottom of the limiting plate. A plurality of dust filters are fixedly connected inside the fixed frame; A plurality of air permeation holes are penetrated on the surface of the porous shell, and the diameter of the air permeation holes is smaller than the diameter of the desiccant particles.

7. The relay protection device for the booster station of the photovoltaic power plant according to claim 6, characterized in that, The bottom of the fixed frame is fixedly connected with a partition board, which is fixedly connected inside the installation shell and divides the interior of the installation shell into upper and lower spaces. A driving part is installed on the side of the installation shell, and the output end of the driving part is fixedly connected with a transmission rod. A plurality of rotating grooves are penetrated through the partition board, and a rotating plate is hermetically rotatably connected in the rotating grooves. The end of the transmission rod away from the driving part hermetically penetrates the installation shell and the partition board and is connected with a plurality of rotating plates through a transmission structure. When the driving part works, it drives a plurality of rotating plates to rotate downward through the transmission rod and the transmission structure. The plurality of rotating plates are located below the fixed frame, and the bottom of the fixed frame penetrates through.

8. The relay protection device of the booster station of the photovoltaic power plant according to claim 7, characterized in that, Both the feeding component and the discharging component include a grille structure connected to the side of the installation shell. The two grille structures are correspondingly located at the top and bottom of the porous shell. The grille mechanism includes an electric telescopic rod installed on the side of the installation shell. The output end of the electric telescopic rod penetrates the installation shell and is fixedly connected with a blocking plate. The end of the blocking plate away from the electric telescopic rod hermetically penetrates and is slidably connected with a connecting shell. The two connecting shells are correspondingly communicated with the top and bottom of the porous shell. A plurality of fixing strips are fixedly connected to the side of the blocking plate extending out of the connecting shell. The desiccant is located inside the porous shell between the two blocking plates. The feeding component further includes a storage box fixedly connected to the inner top of the installation shell. The bottom of the storage box is communicated with the top of the upper connecting shell, and a feed pipe is communicated with the side. The end of the feed pipe away from the storage box hermetically penetrates the installation shell and is fixedly connected with a sealing plug. The bottom of the lower connecting shell penetrates the partition board and is communicated with the lower space of the installation shell.

9. The relay protection device for the booster station of the photovoltaic power plant according to claim 1, characterized in that, A pressure sensor is installed on the third spring, and a gas generating part is installed at the bottom inside the side box. Both the pressure sensor and the gas generating part are electrically connected to a controller, and the controller is installed on the side box. The output end of the gas generating part is communicated with a connecting pipe. The end of the connecting pipe away from the gas generating part hermetically penetrates the side wall of the outer box and is communicated with a first airbag. The first airbag is located on both sides of the relay protection instrument. The controller receives the signal of the pressure sensor to control the working state of the gas generating part. A U-shaped mounting plate is fixedly connected between the first airbag and the inner wall of the outer box.

10. The relay protection device of the booster station of the photovoltaic power plant according to claim 9, characterized in that, It further includes a vibration triggering component. The vibration triggering component includes a T-shaped connecting rod penetrating and slidably connected to the lower fixing plate. A small spring is fixedly connected between the top of the T-shaped connecting rod and the top of the fixing plate. A trigger switch is installed on the top of the gas generating part, and the bottom end of the T-shaped connecting rod is located above the trigger switch.

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