A method for operating and maintaining a photovoltaic power generation system

Abstract

The present invention relates to the field of photovoltaic power generation technology, and in particular to an operation and maintenance method for a photovoltaic power generation system. An embodiment of the present invention provides an operation and maintenance method for a photovoltaic power generation system, which is applied to a photovoltaic power generation system, wherein the photovoltaic power generation system includes a solar cell array, and the solar cell array includes a plurality of photovoltaic power generation panels; the operation and maintenance method includes: laying a light-transmitting film on the surface of the photovoltaic power generation panel; arranging a purge device around the photovoltaic power generation panel, wherein the purge device is used to output an airflow to blow away the sand and dust on the surface of the light-transmitting film; and turning on the purge device according to the thickness of the sand and dust covering the surface of the light-transmitting film. An embodiment of the present invention provides an operation and maintenance method for a photovoltaic power generation system, which can remove the wind and sand on the photovoltaic power generation panels to enable the photovoltaic power generation system to operate stably.

Description

Technical Field

[0001] The present invention relates to the technical field of photovoltaic power generation, and in particular to an operation and maintenance method of a photovoltaic power generation system. Background Art

[0002] Photovoltaic power generation is a technology that uses solar energy to generate electricity.

[0003] In the related technology, photovoltaic power generation systems are mainly set up in areas with high light intensity and relatively dry climate, such as the northwest. However, areas with relatively dry climate are prone to sandstorms, which will cover the photovoltaic panels and affect the efficiency of photovoltaic power generation.

[0004] Therefore, in view of the above-mentioned shortcomings, there is an urgent need for an operation and maintenance method of a photovoltaic power generation system, which can remove the wind and sand on the photovoltaic power generation panels to enable the photovoltaic power generation system to operate stably. Summary of the invention

[0005] The embodiment of the present invention provides an operation and maintenance method of a photovoltaic power generation system, which can remove wind and sand on photovoltaic power generation panels to ensure stable operation of the photovoltaic power generation system.

[0006] An embodiment of the present invention provides an operation and maintenance method of a photovoltaic power generation system, which is applied to a photovoltaic power generation system, wherein the photovoltaic power generation system includes a solar cell array, and the solar cell array includes a plurality of photovoltaic power generation panels;

[0007] The operation and maintenance method comprises:

[0008] Laying a light-transmitting film on the surface of the photovoltaic panel;

[0009] A purge device is arranged around the photovoltaic power generation panel, and the purge device is used to output airflow to blow away the sand and dust on the surface of the light-transmitting film;

[0010] The blowing device is turned on according to the thickness of the dust covering the surface of the light-transmitting film.

[0011] In a possible design, the step of starting the purge device according to the dust coverage thickness on the surface of the light-transmitting film includes:

[0012] A photoresistor is arranged on the photovoltaic power generation panel; wherein the photoresistor is connected to a power source;

[0013] Collecting current data passing through the photoresistor;

[0014] The gas flow rate output by the purge device is controlled according to the current data.

[0015] In a possible design, controlling the gas flow rate output by the purge device according to the current data includes:

[0016] When the current value of the current data is not lower than the preset current value, the purge device does not output airflow;

[0017] When the current value of the current data is lower than the preset current, the gas flow rate output by the purge device is controlled according to the real-time current value of the current data; wherein the real-time current value of the current data is negatively correlated with the gas flow rate output by the purge device.

[0018] In a possible design, the photovoltaic power generation system further includes a power storage unit, and the power storage unit includes a cabinet, a gas cylinder, a water cooling device and a flow regulating device;

[0019] The cabinet is used to install batteries;

[0020] The gas cylinder is used to contain cooling fluid, the outlet of the gas cylinder is connected to the output pipe, and the outlet of the output pipe faces the battery;

[0021] The water cooling device comprises a circulation pipe filled with water and a power device, wherein the circulation pipe is arranged beside the battery to cool the battery, and the power device is used to drive the circulation of the cooling fluid in the circulation pipe, and the circulation pipe is provided with a temperature-sensitive hydrogel;

[0022] The flow regulating device comprises a pressure plate, a transmission device and a baffle plate arranged in the circulation pipeline, the plane where the pressure plate is located intersects with the water flow direction in the circulation pipeline, the pressure plate is connected to the baffle plate through the transmission device, and the baffle plate is movably arranged inside the output pipeline;

[0023] The thermosensitive hydrogel in the circulation pipeline absorbs heat and undergoes phase change to shrink to speed up the flow rate, thereby driving the pressure plate to move. The movement of the pressure plate is transmitted to the baffle through the transmission device to control the baffle to slide and release more of the cooling fluid.

[0024] In a possible design, the cabinet is provided with ventilation holes, and the ventilation holes are covered with a shape memory polymer that is deformed by temperature stimulation, and the shape memory polymer includes an initial plate-like shape, and the shape memory polymer in the initial shape blocks the ventilation holes.

[0025] In a possible design, the air vent is disposed on the top of the cabinet.

[0026] In a possible design, a spring is connected between the pressure plate and the circulation pipe, and the spring is used to lift the pressure plate when the water flow rate in the circulation pipe decreases.

[0027] In a possible design, the transmission device includes a first transmission shaft, a hydraulic pipeline and a second transmission shaft, the circulation pipeline includes a through hole with the same diameter as the first transmission shaft, the first transmission shaft is inserted into the circulation pipeline, a groove is provided in the through hole, a sealing ring is provided in the groove, the two ends of the first transmission shaft are respectively connected to the pressure plate and the first top plug at one end of the hydraulic pipeline, a second top plug is provided at the other end of the hydraulic pipeline, the second top plug is connected to the second transmission shaft, the second transmission shaft is connected to the baffle, and the first top plug and the second top plug are transmitted through the hydraulic oil in the hydraulic pipeline.

[0028] In a possible design, a cross-sectional area of ​​the second top plug is larger than a cross-sectional area of ​​the first top plug.

[0029] In a possible design, the gas cylinder is arranged in a cabinet.

[0030] Compared with the prior art, the present invention has at least the following beneficial effects:

[0031] In the present application, a light-transmitting film is provided on the surface of the photovoltaic panel to protect it without affecting the solar power generation. In addition, the light-transmitting film is easy to replace after being damaged, and the cost is low. A purge device is provided around the photovoltaic panel, and the purge device can output a high-speed and high-pressure airflow. Preferably, the airflow can be a flat airflow to facilitate the purge of the surface of the light-transmitting film. Furthermore, when the thickness of the sand and dust is thin, the impact on solar power generation is not significant. At this time, in order to save energy, the purge device can be turned off. When the thickness of the sand and dust is thick enough to affect solar power generation, the purge device is turned on for purge to ensure stable operation of photovoltaic power generation. BRIEF DESCRIPTION OF THE DRAWINGS

[0032] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0033] Figure 1 is a flow chart of an operation and maintenance method of a photovoltaic power generation system provided by an embodiment of the present invention;

[0034] Figure 2 is a schematic structural diagram of a photovoltaic power generation system provided by an embodiment of the present invention;

[0035] Figure 3 It is a schematic structural diagram of a solar cell array of a photovoltaic power generation system provided by an embodiment of the present invention;

[0036] Figure 4 It is a schematic structural diagram of a power storage unit of a photovoltaic power generation system provided by an embodiment of the present invention.

[0037] In the figure:

[0038] 100- Photovoltaic panels;

[0039] 101-light-transmitting film;

[0040] 102-purge device;

[0041] 1-Cabinet;

[0042] 2- Gas cylinder;

[0043] 3-Battery;

[0044] 4- Output pipeline;

[0045] 5-Circulation pipeline;

[0046] 6- Power plant;

[0047] 7-Thermosensitive hydrogel;

[0048] 8-Pressing plate;

[0049] 9- baffle;

[0050] 10-ventilation holes;

[0051] 11-Shape memory polymers;

[0052] 12- first transmission shaft;

[0053] 13- Hydraulic pipeline;

[0054] 14- second transmission shaft;

[0055] 15-First top plug;

[0056] 16- Second top plug;

[0057] 17- Spring. DETAILED DESCRIPTION

[0058] In order to make the purpose, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments in the present invention, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the present invention.

[0059] In the description of the embodiments of the present invention, unless otherwise clearly specified and limited, the terms "first" and "second" are used for descriptive purposes only and cannot be understood as indicating or implying relative importance; unless otherwise specified or explained, the term "multiple" refers to two or more; the terms "connected" and "fixed" should be understood in a broad sense, for example, "connected" can be a fixed connection, a detachable connection, an integral connection, or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0060] In the description of this specification, it should be understood that the directional words such as "upper" and "lower" described in the embodiments of the present invention are described at the angles shown in the drawings and should not be understood as limiting the embodiments of the present invention. In addition, in the context, it should also be understood that when it is mentioned that an element is connected to another element "upper" or "lower", it can not only be directly connected to another element "upper" or "lower", but also indirectly connected to another element "upper" or "lower" through an intermediate element.

[0061] like Figure 1 and Figure 3 As shown, an embodiment of the present invention provides an operation and maintenance method of a photovoltaic power generation system, which is applied to a photovoltaic power generation system, wherein the photovoltaic power generation system includes a solar cell array, and the solar cell array includes a plurality of photovoltaic power generation panels 100;

[0062] The operation and maintenance method comprises:

[0063] Laying a light-transmitting film 101 on the surface of the photovoltaic panel;

[0064] A purge device 102 is arranged around the photovoltaic power generation panel, and the purge device is used to output airflow to blow away the sand and dust on the surface of the light-transmitting film;

[0065] The blowing device is turned on according to the thickness of the dust covering the surface of the light-transmitting film.

[0066] In the present application, a light-transmitting film is provided on the surface of the photovoltaic panel to protect it without affecting the solar power generation. In addition, the light-transmitting film is easy to replace after being damaged, and the cost is low. A purge device is provided around the photovoltaic panel, and the purge device can output a high-speed and high-pressure airflow. Preferably, the airflow can be a flat airflow to facilitate the purge of the surface of the light-transmitting film. Furthermore, when the thickness of the sand and dust is thin, the impact on solar power generation is not significant. At this time, in order to save energy, the purge device can be turned off. When the thickness of the sand and dust is thick enough to affect solar power generation, the purge device is turned on for purge to ensure stable operation of photovoltaic power generation.

[0067] In some embodiments of the present invention, the step of starting the purge device according to the dust coverage thickness on the surface of the light-transmitting film comprises:

[0068] A photoresistor is arranged on the photovoltaic power generation panel; wherein the photoresistor is connected to a power source;

[0069] Collecting current data passing through the photoresistor;

[0070] The gas flow rate output by the purge device is controlled according to the current data.

[0071] In some embodiments of the present invention, controlling the gas flow rate output by the purge device according to the current data includes:

[0072] When the current value of the current data is not lower than the preset current value, the purge device does not output airflow;

[0073] When the current value of the current data is lower than the preset current, the gas flow output by the purge device is controlled according to the real-time current value of the current data; wherein the real-time current value of the current data is negatively correlated with the gas flow output by the purge device.

[0074] like Figure 2 and Figure 4 As shown, in some embodiments of the present invention, the photovoltaic power generation system further includes a power storage unit, and the power storage unit includes a cabinet 1, a gas cylinder 2, a water cooling device and a flow regulating device;

[0075] The cabinet 1 is used to install the battery 3;

[0076] The gas cylinder 2 is used to contain cooling fluid, the outlet of the gas cylinder 2 is connected to the output pipe 4, and the outlet of the output pipe 4 faces the battery 3;

[0077] The water cooling device includes a circulation pipe 5 filled with water and a power device 6. The circulation pipe 5 is arranged beside the battery 3 to cool the battery 3. The power device 6 is used to drive the circulation of the cooling fluid in the circulation pipe 5. The circulation pipe 5 is provided with a temperature-sensitive hydrogel 7.

[0078] The flow regulating device includes a pressure plate 8, a transmission device and a baffle 9 arranged in the circulation pipeline 5. The plane where the pressure plate 8 is located intersects with the water flow direction in the circulation pipeline 5. The pressure plate 8 is connected to the baffle 9 through the transmission device. The baffle 9 is movably arranged inside the output pipeline 4.

[0079] The thermosensitive hydrogel 7 in the circulation pipe 5 absorbs heat and changes phase to shrink to speed up the flow rate, thereby driving the pressure plate 8 to move. The movement of the pressure plate 8 is transmitted to the baffle 9 through the transmission device to control the baffle 9 to slide and release more cooling fluid.

[0080] In this embodiment, the current of photovoltaic power generation converges in the power storage unit. The power storage unit generates heat during operation. Excessive operating temperature will reduce its working efficiency and shorten its service life. The existing cooling method is air cooling, where a large amount of air enters and exits the power storage unit to cool it. However, wind and sand will enter the power storage unit with a large amount of air, and sand and dust will also threaten the normal use of the power storage unit.

[0081] In order to solve the above problems, the present application designs a heat dissipation system. Specifically, when heat is dissipated, the water in the circulation pipe 5 first absorbs the heat of the battery 3 to cool the battery 3. Through the water circulation in the circulation pipe 5, part of the high-temperature water in the part of the circulation pipe 5 close to the battery 3 flows, and the subsequent low-temperature water replenishment continues to absorb heat. Water has a high specific heat capacity and can absorb a sufficiently high amount of heat within a certain period of time. However, when the battery 3 is operated at high power or for a long time, the overall temperature of the water in the circulation pipe 5 rises and the cooling effect is weakened. At this time, the temperature of the thermosensitive hydrogel 7 in the circulation pipe 5 rises to the phase transition temperature and water cooling is performed. When the water in the circulation pipe 5 is heated to the phase transition temperature of the thermosensitive hydrogel 7, the thermosensitive hydrogel 7 shrinks to a solid state, so that the water flow rate in the circulation pipe 5 becomes faster, and then the pressing plate 8 is pressed down. The transmission device transmits the power of pressing the pressing plate 8 to the baffle 9 through the transmission device. The baffle 9 is displaced to reduce the obstruction of the cross section of the output pipe 4, so that the outlet of the output pipe 4 starts or increases the output of the cooling fluid. During the whole process, a relatively closed environment is maintained inside the power storage unit cabinet 1, and cooling of the storage battery 3 does not require a large amount of air for heat exchange, which can reduce the dust in the air from entering the interior.

[0082] In this embodiment, the cryogenic fluid may be liquid nitrogen or liquid carbon dioxide. The power device 6 may be a propeller or a pump.

[0083] It should be noted that the thermosensitive hydrogel 7 having a suitable phase transition temperature can be flexibly selected according to the heat dissipation requirements.

[0084] In this embodiment, the thermosensitive hydrogel 7 can be a PNIPAAm-PEG thermosensitive hydrogel 7: its transition temperature (also called lower critical solution temperature, LCST) is usually around 20° C. This means that when the temperature is below 20° C., the hydrogel is in a liquid state, and when the temperature is above 20° C., it turns into a gel state.

[0085] The thermosensitive hydrogel 7 may also be a PLGA-PEG-PLGA thermosensitive hydrogel 7: the phase transition temperature of this hydrogel is usually near body temperature, for example, about 35±2° C. This enables it to respond to physiological conditions in in vivo applications and achieve local controlled drug release.

[0086] The thermosensitive hydrogel 7 can also be polyethylene glycol polylactic acid thermosensitive hydrogel 7: its phase transition temperature can be controlled at 38.5-40° C. This temperature range can better preserve water, and when the temperature is higher than the phase transition temperature, the hydrogel will lose water significantly in a short time.

[0087] The phase transition temperature of the thermosensitive hydrogel 7 is affected by many factors, including the type, concentration, molecular weight, cross-linking degree of the polymer and external conditions (such as pH value, ionic strength, etc.).

[0088] It should be noted that, in order to better reflect the structure of the present application, the drawings only show one modular battery 3. Of course, when there are multiple batteries 3, the positions of other devices can be adaptively adjusted according to the positions of the batteries 3.

[0089] In this embodiment, the cross section of the circulation pipe 5 can be designed to be rounded, so that the flow rate in the circulation pipe 5 is more uniform. The temperature-sensitive hydrogel 7 can be fixed on the inner wall of the circulation pipe 5.

[0090] In some embodiments of the present invention, the cabinet 1 is provided with an air vent 10 , and the air vent 10 is covered with a shape memory polymer 11 that is deformed by temperature stimulation. The shape memory polymer 11 includes an initial plate-like shape, and the shape memory polymer 11 of the initial shape blocks the air vent 10 .

[0091] When the temperature in the cabinet 1 rises and the temperature of the shape memory polymer 11 reaches above the glass transition temperature Tg, the shape memory polymer 11 softens. At this time, due to the high temperature in the cabinet 1, the cryogenic fluid in the gas cylinder 2 is continuously released, and while the temperature is lowered, the air pressure in the cabinet 1 increases. At this time, the gas, under the action of the air pressure, can impact the shape memory polymer 11 through the air vents 10, causing it to deform. The increased air pressure is released at the softened shape memory polymer 11, keeping the air pressure in the cabinet 1 stable, and using the gas in the gas cylinder 2 to discharge smoothly. When the gas in the cabinet 1 continuously outputs the cryogenic fluid, the temperature of the gas in the cabinet 1 continues to decrease. After the temperature drops, the thermosensitive hydrogel 7 in the circulation channel swells, causing the flow rate to slow down, and the baffle 9 is lifted, reducing or stopping the output of the cryogenic fluid from the gas cylinder 2. When the gases inside and outside the cabinet 1 tend to be balanced, the shape memory polymer 11 above the Tg temperature overcomes the small pressure difference under the action of the deformation force and returns to the original shape of the closed air vent 10. As the temperature of the shape memory polymer 11 drops below the Tg temperature, the shape memory polymer 11 hardens and maintains the original shape of the closed air vent 10.

[0092] It is understandable that in order to improve the deformation sensitivity of the shape memory polymer 11, a shape memory polymer 11 with a low Tg temperature may be selected.

[0093] It should be noted that the shape memory polymer 11 with a suitable phase transition temperature can be selected according to the requirements. For example, the shape memory polymer 11 can be any one of polyurethane, polymethyl acrylate, polyester and polyvinyl alcohol.

[0094] In some embodiments of the present invention, the ventilation hole 10 is disposed on the top of the cabinet 1 .

[0095] In this embodiment, the low-temperature gas output from the gas cylinder 2 has a relatively low temperature and will shrink and drop in the cabinet 1, while the original high-temperature gas in the cabinet 1 expands and rises. The rising hot air flow heats the shape memory polymer 11 to soften it and then discharge it from the cabinet 1.

[0096] In some embodiments of the present invention, a spring 17 is connected between the pressure plate 8 and the circulation pipe 5, and the spring 17 is used to lift the pressure plate 8 when the water flow rate in the circulation pipe 5 decreases.

[0097] In this embodiment, when the spring 17 is set to slow down the flow rate of water in the circulation pipe 5, the pressure plate 8 is lifted under the action of the spring 17, and then the baffle 9 is controlled by the transmission device to close the output pipe 4 again.

[0098] In some embodiments of the present invention, the transmission device includes a first transmission shaft 12, a hydraulic pipeline 13 and a second transmission shaft 14. The circulation pipeline 5 includes a through hole with the same diameter as the first transmission shaft 12. The first transmission shaft 12 is inserted into the circulation pipeline 5. A groove is provided in the through hole. A sealing ring is provided in the groove. The two ends of the first transmission shaft 12 are respectively connected to the pressure plate 8 and the first top plug 15 at one end of the hydraulic pipeline 13. A second top plug 16 is provided at the other end of the hydraulic pipeline 13. The second top plug 16 is connected to the second transmission shaft 14. The second transmission shaft 14 is connected to the baffle 9. The first top plug 15 and the second top plug 16 are transmitted through the hydraulic oil in the hydraulic pipeline 13.

[0099] In this embodiment, the force of water in the circulation pipe 5 on the pressure plate 8 can be transmitted to the baffle 9 by means of hydraulic transmission. The sealing ring can maintain the sealing of the circulation pipe 5 while the first transmission shaft 12 moves.

[0100] In some embodiments of the present invention, the cross-sectional area of ​​the second top plug 16 is greater than the cross-sectional area of ​​the first top plug 15 .

[0101] In this embodiment, according to Pascal's law, the relatively small force of the water flow on the pressure plate 8 can be amplified by setting a difference in cross-sectional area between the first top plug 15 and the second top plug 16, so that the transmission force on the baffle 9 is doubled.

[0102] In some embodiments of the present invention, the gas cylinder 2 is disposed in the cabinet 1 .

[0103] In this embodiment, the gas cylinder 2 is arranged in the cabinet 1, and fewer holes are required on the cabinet 1, so the structure is simpler.

[0104] In some embodiments of the present invention, a thermosensitive hydrogel 7 with different phase transition temperatures is provided in the circulation pipe 5. Such a configuration can make the water flow rate change more smoothly with the temperature, and make the amount of cryogenic fluid output by the gas cylinder 2 more closely correlated with the temperature of the water in the circulation pipe 5.

[0105] In some embodiments of the present invention, the temperature-sensitive hydrogel 7 is fixedly arranged at different positions of the circulation pipe 5. Such an arrangement can increase the connection between the average temperature of the water in the circulation pipe 5 and the temperature-sensitive hydrogel 7. Since the temperature distribution of the water in the circulation pipe 5 is not uniform, if the temperature-sensitive hydrogel 7 is arranged at a centralized position, the phase change of the temperature-sensitive hydrogel 7 may be delayed or advanced, resulting in a weakened regulation of the output of the cryogenic fluid by the gas cylinder 2.

[0106] It should also be noted that the structures in the present invention that can be movably inserted into the housing can all be passed through shafts and holes of the same size and cooperate with sealing rings to achieve dynamic sealing.

[0107] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or make equivalent replacements for some of the technical features therein. However, these modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. A photovoltaic power generation system operation and maintenance method, characterized in that: Applied to a photovoltaic power generation system, the photovoltaic power generation system comprises a solar cell array, and the solar cell array comprises a plurality of photovoltaic power generation panels; The operation and maintenance method comprises: Laying a light-transmitting film on the surface of the photovoltaic panel; A purge device is arranged around the photovoltaic power generation panel, and the purge device is used to output airflow to blow away the sand and dust on the surface of the light-transmitting film; Turning on the purge device according to the thickness of dust covering the surface of the light-transmitting film; The photovoltaic power generation system also includes a power storage unit, which includes a cabinet, a gas cylinder, a water cooling device and a flow regulating device; The cabinet is used to install batteries; The gas cylinder is used to contain cooling fluid, the outlet of the gas cylinder is connected to the output pipe, and the outlet of the output pipe faces the battery; The water cooling device comprises a circulation pipe filled with water and a power device, wherein the circulation pipe is arranged beside the battery to cool the battery, and the power device is used to drive the circulation of the cooling fluid in the circulation pipe, and the circulation pipe is provided with a temperature-sensitive hydrogel; The flow regulating device comprises a pressure plate, a transmission device and a baffle plate arranged in the circulation pipeline, the plane where the pressure plate is located intersects with the water flow direction in the circulation pipeline, the pressure plate is connected to the baffle plate through the transmission device, and the baffle plate is movably arranged inside the output pipeline; The thermosensitive hydrogel in the circulation pipeline absorbs heat and undergoes phase change to shrink to speed up the flow rate, thereby driving the pressure plate to move. The movement of the pressure plate is transmitted to the baffle through the transmission device to control the baffle to slide and release more of the cooling fluid.

2. The operation and maintenance method according to claim 1, characterized in that: The step of starting the purge device according to the dust coverage thickness on the surface of the light-transmitting film comprises: A photoresistor is arranged on the photovoltaic power generation panel; wherein the photoresistor is connected to a power source; Collecting current data passing through the photoresistor; The gas flow rate output by the purge device is controlled according to the current data.

3. The operation and maintenance method according to claim 2, characterized in that: The step of controlling the gas flow rate output by the purge device according to the current data comprises: When the current value of the current data is not lower than the preset current value, the purge device does not output airflow; When the current value of the current data is lower than the preset current, the gas flow output by the purge device is controlled according to the real-time current value of the current data; wherein the real-time current value of the current data is negatively correlated with the gas flow output by the purge device.

4. The operation and maintenance method according to claim 1, characterized in that: The cabinet is provided with an air vent, and the air vent is covered with a shape memory polymer that is deformed by temperature stimulation. The shape memory polymer includes an initial plate-like shape, and the shape memory polymer in the initial shape blocks the air vent.

5. The operation and maintenance method according to claim 4, characterized in that: The air vent is arranged on the top of the cabinet.

6. The operation and maintenance method according to claim 1, characterized in that: A spring is connected between the pressure plate and the circulation pipeline, and the spring is used to lift the pressure plate when the water flow rate in the circulation pipeline decreases.

7. The operation and maintenance method according to claim 6, characterized in that: The transmission device includes a first transmission shaft, a hydraulic pipeline and a second transmission shaft. The circulation pipeline includes a through hole with the same diameter as the first transmission shaft. The first transmission shaft is inserted into the circulation pipeline. A groove is provided in the through hole. A sealing ring is provided in the groove. The two ends of the first transmission shaft are respectively connected to the pressure plate and the first top plug at one end of the hydraulic pipeline. The other end of the hydraulic pipeline is provided with a second top plug. The second top plug is connected to the second transmission shaft. The second transmission shaft is connected to a baffle. The first top plug and the second top plug are transmitted through the hydraulic oil in the hydraulic pipeline.

8. The operation and maintenance method according to claim 7, characterized in that: The cross-sectional area of ​​the second top plug is greater than the cross-sectional area of ​​the first top plug.

9. The operation and maintenance method according to claim 1, characterized in that: The gas cylinder is arranged in the cabinet.

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