Photovoltaic panel cleanliness detection system and detection method
By using photovoltaic panels, controllers and detection modules in series or parallel connections in the photovoltaic panel detection system, the temperature difference and power difference of the photovoltaic panel are detected, and the accuracy and frequent cleaning of the photovoltaic panel cleaning are solved, achieving more efficient photovoltaic power generation and reducing operation and maintenance costs.
Patent Information
- Application Number
- CN202411532906.8
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2024-10-30
- Publication Date
- 2025-03-21
AI Technical Summary
Photovoltaic panels are prone to accumulate particles such as dust during outdoor operation, resulting in a decrease in cleanliness, affecting the photoelectric conversion efficiency, and increasing heat transfer thermal resistance, which may lead to excessive temperature and burnt dark spots. The prior art is difficult to detect the cleanliness of photovoltaic panels in a timely and accurate manner, resulting in frequent cleaning work increasing operation and maintenance costs and may damage photovoltaic panels.
A photovoltaic panel cleanliness detection system is provided, including a first and second photovoltaic panel connected in series or in parallel, a controller, a cleaning device, a thermometer, a photometer and a power detection module. By detecting the temperature difference and power difference between the two photovoltaic panels, the difference in cleanliness and determining whether to clean one or two photovoltaic panels based on the difference size.
It improves the accuracy of the cleanliness detection of photovoltaic panels, reduces unnecessary frequent cleaning work, reduces damage to the surface of photovoltaic panels, and ensures the stability of photovoltaic power generation efficiency.
Smart Images
Figure CN119675588A_ABST
Abstract
Description
Technical Field
[0001] The present disclosure relates to the technical field of photovoltaic panel cleaning, and in particular, to a photovoltaic panel cleanliness detection system and detection method. Background Art
[0002] The core component of the photovoltaic power generation system, the photovoltaic panel, is directly exposed to the outdoors. It is easy to accumulate dust and other particles during operation, which leads to a decrease in surface cleanliness and photoelectric conversion efficiency, causing a series of hazards to the photovoltaic power generation system.
[0003] Photovoltaic power generation modules are very sensitive to temperature. As dust accumulates on the surface of the modules, the heat transfer resistance of the modules increases, and it becomes a heat insulation layer on the modules, affecting their heat dissipation. When the modules are exposed to sunlight for a long time, the temperature rises much faster in the covered part than in the uncovered part, causing the temperature to be too high and dark spots to appear. Under normal illumination conditions, when the covered part of the panels is connected in series with other parts of the relevant circuit, it may also change from a power generation unit to a power consumption unit. The shielded photovoltaic cells will become load resistors that do not generate electricity, consuming the electricity generated by the connected batteries, that is, generating heat. This is the hot spot effect. This process will aggravate the aging of the panels, and in severe cases, it will cause the modules to burn out.
[0004] Therefore, timely cleaning or washing of photovoltaic panels is crucial to restore the power generation efficiency of photovoltaic panels. The cleaning of photovoltaic panels needs to be arranged reasonably according to their cleanliness. However, outside the photovoltaic power station, a large number of photovoltaic panels are covered with various obstructions. The fundamental reason is that the distributed photovoltaic power station has a large area and a large number of equipment. It is difficult to find problems in time by manual inspection of the cleaning status, and it is difficult for the human eye to quantify the cleanliness of photovoltaic panels, so it is impossible to arrange timely cleaning and maintenance.
[0005] In contrast to not cleaning photovoltaic panels for a long time, frequent and regular cleaning of photovoltaic panels not only increases the workload and operation and maintenance costs, but may also reduce the life of the photovoltaic panels.
[0006] If the photovoltaic power station can grasp the cleanliness of the photovoltaic panels in a timely manner and arrange for cleaning in time when the cleanliness decreases, it will definitely ensure the efficiency of photovoltaic power generation, while reducing unnecessary frequent cleaning work, saving labor costs and reducing surface damage to the photovoltaic panels. Summary of the invention
[0007] The purpose of the present disclosure is to provide a photovoltaic panel cleanliness detection system and detection method to solve the technical problems existing in the related art.
[0008] In order to achieve the above-mentioned object, the present disclosure provides a photovoltaic panel cleanliness detection system, the detection system comprising a first photovoltaic panel, a second photovoltaic panel, a controller, a first cleaning device, a second cleaning device, a first thermometer, a second thermometer, a first photometer, a second photometer and a power detection module; The first photovoltaic panel and the second photovoltaic panel are connected in series or in parallel, and the power detection module is used to detect the power of the first photovoltaic panel and the second photovoltaic panel; The first cleaning device is used to clean the surface of the first photovoltaic panel, and the second cleaning device is used to clean the surface of the second photovoltaic panel; The first thermometer is used to detect the temperature of the surface of the first photovoltaic panel, and the second thermometer is used to detect the temperature of the surface of the second photovoltaic panel; The first photometer is used to detect the illuminance at the first photovoltaic panel, and the second photometer is used to detect the illuminance of the second photovoltaic panel; The first cleaning device, the second cleaning device, the first thermometer, the second thermometer, the first photometer, the second photometer and the power detection module are all electrically connected to the controller.
[0009] Optionally, the first photovoltaic panel and the second photovoltaic panel are connected in series, and the power detection module includes a first voltmeter, a second voltmeter and a first ammeter; The first voltmeter is used to detect the voltage of the first photovoltaic panel, the second voltmeter is used to detect the voltage of the second photovoltaic panel, and the first ammeter is used to detect the current of the first photovoltaic panel and the second photovoltaic panel; Wherein, the first voltmeter, the second voltmeter and the first ammeter are all electrically connected to the controller.
[0010] Optionally, the first photovoltaic panel and the second photovoltaic panel are connected in parallel, and the power detection module includes a second ammeter, a third ammeter and a third voltmeter; The second ammeter is used to detect the current of the first photovoltaic panel, the third ammeter is used to detect the current of the second photovoltaic panel, and the third voltmeter is used to detect the voltage of the first photovoltaic panel and the second photovoltaic panel; Wherein, the second ammeter, the third ammeter and the third voltmeter are all electrically connected to the controller.
[0011] Optionally, the first cleaning device and / or the second cleaning device comprises: a mounting bracket, a lead screw slider assembly, a drive motor and a cleaning brush; The screw and slider assembly comprises a screw and a slider, wherein the screw is rotatably and axially locked on the mounting bracket, and the slider is circumferentially locked and movably sleeved on the screw; The driving motor is arranged on the mounting bracket and is used to drive the lead screw to rotate. The cleaning brush is connected to the slider and can clean the first photovoltaic panel and / or the second photovoltaic panel.
[0012] Optionally, the detection system further includes an inverter, and the inverter is electrically connected to the first photovoltaic panel and the second photovoltaic panel.
[0013] The present disclosure further provides a photovoltaic panel cleanliness detection method, which is applied to the above-mentioned detection system, and the detection method includes: Selecting the first photovoltaic panel and the second photovoltaic panel connected in series or in parallel as reference photovoltaic panels; The controller controls the first cleaning device to clean the first photovoltaic panel, and controls the second cleaning device to clean the second photovoltaic panel; The controller determines a first temperature difference between the first photovoltaic panel and the second photovoltaic panel after cleaning by using the first thermometer and the second thermometer; The controller determines a first power difference between the first photovoltaic panel and the second photovoltaic panel after cleaning through the power detection module; The controller controls the first cleaning device to clean the first photovoltaic panel at first time intervals, and determines a second temperature difference and a second power difference between the first photovoltaic panel and the second photovoltaic panel; If the difference between the first temperature difference and the second temperature difference is greater than a first preset temperature, and / or the difference between the first power difference and the second power difference is greater than a first preset power, return to step 2; If the difference between the first temperature difference and the second temperature difference is not greater than the first preset temperature, and / or the difference between the first power difference and the second power difference is not greater than the first preset power, return to step 5.
[0014] Optionally, the selecting the first photovoltaic panel and the second photovoltaic panel connected in series or in parallel as reference photovoltaic panels comprises: The voltage and current detection data fault limit ranges and the temperature detection data fault limit ranges of the first photovoltaic panel and the second photovoltaic panel are preset.
[0015] Optionally, the selecting the first photovoltaic panel and the second photovoltaic panel connected in series or in parallel as reference photovoltaic panels further comprises: The detection data out-of-limit ranges of the first photometer and the second photometer are preset.
[0016] Optionally, after selecting the first photovoltaic panel and the second photovoltaic panel connected in series or in parallel as reference photovoltaic panels, the method further includes: The output voltage and current of the first photovoltaic panel and / or the second photovoltaic panel are detected, and when the corresponding values reach a fault standard, it is determined that the first photovoltaic panel and / or the second photovoltaic panel itself is faulty or the instrument is faulty.
[0017] Optionally, after selecting the first photovoltaic panel and the second photovoltaic panel connected in series or in parallel as reference photovoltaic panels, the method further includes: The output data of the first photometer and / or the second photometer is detected, and when the data reaches a failure standard, the first photometer and / or the second photometer is determined to be faulty.
[0018] In the above technical solution, by setting the first photovoltaic panel and the second photovoltaic panel in series or in parallel, and respectively setting the corresponding first cleaning device and the second cleaning device, the controller can control the first cleaning device to clean the surface of the first photovoltaic panel, and can control the second cleaning device to clean the surface of the second photovoltaic panel, and the first thermometer and the second thermometer can respectively detect the surface temperature of the first photovoltaic panel and the surface temperature of the second photovoltaic panel after cleaning, and the power detection module can detect the power of the first photovoltaic panel and the second photovoltaic panel after cleaning. That is, by detecting the surface temperature and power of the two photovoltaic panels, and using them to characterize the cleanliness of the two photovoltaic panels, the temperature difference and power difference of the two photovoltaic panels are used to determine the difference in cleanliness between the two photovoltaic panels. If the difference in cleanliness is small, only one of them can be cleaned. If the difference in cleanliness is large, both of them can be cleaned, so that the influence of the decrease in photoelectric conversion efficiency caused by the aging of the photovoltaic panel itself or other reasons on the cleanliness detection result can be eliminated, and the accuracy of the cleanliness detection of the photovoltaic panel is improved, while unnecessary frequent cleaning work is reduced, and the surface damage of the photovoltaic panel is reduced.
[0019] Other features and advantages of the present disclosure will be described in detail in the following detailed description. BRIEF DESCRIPTION OF THE DRAWINGS
[0020] The accompanying drawings are used to provide a further understanding of the present disclosure and constitute a part of the specification. Together with the following specific embodiments, they are used to explain the present disclosure but do not constitute a limitation of the present disclosure. In the accompanying drawings: Figure 1 Schematic diagram of a photovoltaic panel cleanliness detection system according to an embodiment of the present disclosure.
[0021] Figure 2 It is a flowchart of a photovoltaic panel cleanliness detection method according to an embodiment of the present invention.
[0022] Description of Reference Numerals 1. The first photovoltaic panel; 2. The second photovoltaic panel; 3. The controller; 4. The first cleaning device; 5. The second cleaning device; 6. The first thermometer; 7. The second thermometer; 8. The first photometer; 9. The second photometer; 10. The power detection module; 101. The first voltmeter; 102. The second voltmeter; 103. The first ammeter. DETAILED DESCRIPTION
[0023] The specific implementation of the present disclosure is described in detail below in conjunction with the accompanying drawings. It should be understood that the specific implementation described herein is only used to illustrate and explain the present disclosure, and is not used to limit the present disclosure.
[0024] Reference Figure 1 As shown, the present disclosure provides a photovoltaic panel cleanliness detection system, which includes a first photovoltaic panel 1, a second photovoltaic panel 2, a controller 3, a first cleaning device 4, a second cleaning device 5, a first thermometer 6, a second thermometer 7, a first photometer 8, a second photometer 9 and a power detection module 10.
[0025] The first photovoltaic panel 1 and the second photovoltaic panel 2 are connected in series or in parallel, and the power detection module 10 is used to detect the power of the first photovoltaic panel 1 and the second photovoltaic panel 2 .
[0026] The first cleaning device 4 is used to clean the surface of the first photovoltaic panel 1 , and the second cleaning device 5 is used to clean the surface of the second photovoltaic panel 2 .
[0027] The first thermometer 6 is used to detect the temperature of the surface of the first photovoltaic panel 1 , and the second thermometer 7 is used to detect the temperature of the surface of the second photovoltaic panel 2 .
[0028] The first photometer 8 is used to detect the illuminance at the first photovoltaic panel 1 , and the second photometer 9 is used to detect the illuminance at the second photovoltaic panel 2 .
[0029] The first cleaning device 4 , the second cleaning device 5 , the first thermometer 6 , the second thermometer 7 , the first photometer 8 , the second photometer 9 and the power detection module 10 are all electrically connected to the controller 3 .
[0030] In the above technical scheme, by setting the first photovoltaic panel 1 and the second photovoltaic panel 2 in series or parallel, and respectively setting the corresponding first cleaning device 4 and the second cleaning device 5, the controller 3 can control the first cleaning device 4 to clean the surface of the first photovoltaic panel 1, and can control the second cleaning device 5 to clean the surface of the second photovoltaic panel 2, and the first thermometer 6 and the second thermometer 7 can respectively detect the surface temperature of the first photovoltaic panel 1 and the surface temperature of the second photovoltaic panel 2 after cleaning, and the power detection module 10 can detect the power of the first photovoltaic panel 1 and the second photovoltaic panel 2 after cleaning. That is, by detecting the surface temperature and power of the two photovoltaic panels and using them to characterize the cleanliness of the two photovoltaic panels, the temperature difference and power difference between the two photovoltaic panels are used to determine the difference in cleanliness between the two photovoltaic panels. When the difference in cleanliness is small, only one of them needs to be cleaned. If the difference in cleanliness is large, both of them need to be cleaned. This can eliminate the impact of the decrease in photoelectric conversion efficiency caused by aging of the photovoltaic panels themselves or other reasons on the cleanliness test results, thereby improving the accuracy of photovoltaic panel cleanliness detection, while reducing unnecessary frequent cleaning work and reducing surface damage to the photovoltaic panels.
[0031] In addition, the first photometer 8 and the second photometer 9 are used to detect the intensity of sunlight. When the sunlight intensity measured by the first photometer 8 and the second photometer 9 reaches a preset photometric value (such as when the sunlight is good during the day), the temperature and power of the first photovoltaic panel 1 and the second photovoltaic panel 2 are detected.
[0032] In one embodiment, referring to Figure 1 As shown, the first photovoltaic panel 1 and the second photovoltaic panel 2 are connected in series, and the power detection module 10 includes a first voltmeter 101, a second voltmeter 102 and a first ammeter 103; the first voltmeter 101 is used to detect the voltage of the first photovoltaic panel 1, the second voltmeter 102 is used to detect the voltage of the second photovoltaic panel 2, and the first ammeter 103 is used to detect the current of the first photovoltaic panel 1 and the second photovoltaic panel 2; wherein the first voltmeter 101, the second voltmeter 102 and the first ammeter 103 are all electrically connected to the controller 3. Since the first photovoltaic panel 1 and the second photovoltaic panel 2 are connected in series, the currents of the first photovoltaic panel 1 and the second photovoltaic panel 2 are consistent and detected by the first ammeter 103, and by setting the first voltmeter 101 and the second voltmeter 102, the power of the first photovoltaic panel 1 and the second photovoltaic panel 2 can be detected respectively.
[0033] In another embodiment, the first photovoltaic panel 1 and the second photovoltaic panel 2 are connected in parallel, and the power detection module 10 includes a second ammeter, a third ammeter and a third voltmeter; the second ammeter is used to detect the current of the first photovoltaic panel 1, the third ammeter is used to detect the current of the second photovoltaic panel 2, and the third voltmeter is used to detect the voltage of the first photovoltaic panel 1 and the second photovoltaic panel 2; wherein the second ammeter, the third ammeter and the third voltmeter are all electrically connected to the controller 3. That is, in this embodiment, by connecting the first photovoltaic panel 1 and the second photovoltaic panel 2 in parallel, and by setting the second ammeter, the third ammeter and the third voltmeter, the power of the first photovoltaic panel 1 and the second photovoltaic panel 2 can also be detected respectively.
[0034] Optionally, the first cleaning device 4 and / or the second cleaning device 5 include: a mounting bracket (not shown), a lead screw slider assembly (not shown), a drive motor (not shown) and a cleaning brush (not shown). The lead screw slider assembly includes a lead screw and a slider, the lead screw is rotatably and axially locked on the mounting bracket, and the slider is circumferentially locked and movably sleeved on the lead screw; the drive motor is arranged on the mounting bracket and is used to drive the lead screw to rotate, and the cleaning brush is connected to the slider and can clean the first photovoltaic panel and / or the second photovoltaic panel.
[0035] In this embodiment, the driving motor drives the lead screw to rotate, thereby driving the slider sleeved on the lead screw to move, and since the cleaning brush is connected to the slider, the cleaning brush can move with the slider, thereby cleaning the first photovoltaic panel and / or the second photovoltaic panel. However, the present disclosure does not limit the specific structure of the first cleaning device 4 and / or the second cleaning device 5.
[0036] In addition, the detection system may further include an inverter (not shown), which is electrically connected to the first photovoltaic panel 1 and the second photovoltaic panel 2. By providing an inverter, direct current can be easily converted into alternating current, which facilitates the transmission and use of current.
[0037] Reference Figure 2 As shown, the present disclosure also provides a photovoltaic panel cleanliness detection method, which is applied to the above-mentioned detection system, and the detection method includes: Selecting a first photovoltaic panel 1 and a second photovoltaic panel 2 connected in series or in parallel as reference photovoltaic panels; The controller controls the first cleaning device 4 to clean the first photovoltaic panel 1, and controls the second cleaning device 5 to clean the second photovoltaic panel 2; The controller 3 determines the first temperature difference between the first photovoltaic panel 1 and the second photovoltaic panel 2 after cleaning through the first thermometer 6 and the second thermometer 7; The controller 3 determines the first power difference between the first photovoltaic panel 1 and the second photovoltaic panel 2 after cleaning through the power detection module 10; The controller 3 controls the first cleaning device 4 to clean the first photovoltaic panel 1 at a first time interval, and determines a second temperature difference and a second power difference between the first photovoltaic panel 1 and the second photovoltaic panel 2; If the difference between the first temperature difference and the second temperature difference is greater than the first preset temperature, and / or the difference between the first power difference and the second power difference is greater than the first preset power, return to step 2; If the difference between the first temperature difference and the second temperature difference is not greater than the first preset temperature, and / or the difference between the first power difference and the second power difference is not greater than the first preset power, return to step 5.
[0038] In the above technical solution, firstly, the first photovoltaic panel 1 and the second photovoltaic panel 2 connected in series or in parallel are selected as reference photovoltaic panels for comparison, and the two photovoltaic panels are cleaned by the first cleaning device 4 and the second cleaning device 5, and then the temperature and power of the two photovoltaic panels after cleaning are detected, and the temperature difference and power difference are determined, and then the first photovoltaic panel 1 is cleaned by the first cleaning device 4 at each first time interval, and the temperature difference and power difference of the two photovoltaic panels are always determined, if the temperature difference between the two is greater than the first preset temperature, and / or, if the power difference between the two is greater than the first preset power, then both photovoltaic panels are cleaned. If the temperature difference between the two is not greater than the first preset temperature, and / or, if the power difference between the two is not greater than the first preset power, then the first photovoltaic panel 1 continues to be cleaned at each first time interval.
[0039] That is, by detecting the surface temperature and power of the two photovoltaic panels and using them to characterize the cleanliness of the two photovoltaic panels, the temperature difference and power difference between the two photovoltaic panels are used to determine the difference in cleanliness between the two photovoltaic panels. When the difference in cleanliness is small, only one of them needs to be cleaned. If the difference in cleanliness is large, both of them need to be cleaned. This can eliminate the impact of the decrease in photoelectric conversion efficiency caused by aging of the photovoltaic panels themselves or other reasons on the cleanliness test results, thereby improving the accuracy of photovoltaic panel cleanliness detection, while reducing unnecessary frequent cleaning work and reducing surface damage to the photovoltaic panels.
[0040] In one embodiment, selecting a first photovoltaic panel 1 and a second photovoltaic panel 2 connected in series or in parallel as reference photovoltaic panels includes: presetting a fault limit range of voltage and current detection data and a fault limit range of temperature detection data of the first photovoltaic panel 1 and the second photovoltaic panel 2 to avoid damage to the first photovoltaic panel 1 and the second photovoltaic panel 2 and ensure the normal operation of the first photovoltaic panel 1 and the second photovoltaic panel 2.
[0041] Optionally, selecting a first photovoltaic panel 1 and a second photovoltaic panel 2 connected in series or in parallel as reference photovoltaic panels also includes: presetting a detection data out-of-limit range for the first photometer 8 and the second photometer 9. When the output data of the first photometer 8 or the second photometer 9 exceeds the detection range of the data, it is determined that the first photometer 8 and the second photometer 9 are faulty, and a corresponding prompt is issued to the operation and maintenance personnel.
[0042] Optionally, after selecting the first photovoltaic panel 1 and the second photovoltaic panel 2 connected in series or in parallel as reference photovoltaic panels, it also includes: detecting the output voltage and current of the first photovoltaic panel 1 and / or the second photovoltaic panel 2, and when the corresponding values reach the fault standard, it is determined that the first photovoltaic panel 1 and / or the second photovoltaic panel 2 itself is faulty or the instrument is faulty, and then corresponding prompts can be issued to the operation and maintenance personnel.
[0043] After selecting the first photovoltaic panel 1 and the second photovoltaic panel 2 connected in series or in parallel as reference photovoltaic panels, the method also includes: detecting the output data of the first photometer 8 and / or the second photometer 9, and when the data reaches the fault standard, determining that the first photometer 8 and / or the second photometer 9 is faulty, and repairing or replacing the first photometer 8 and the second photometer 9.
[0044] The preferred embodiments of the present disclosure are described in detail above in conjunction with the accompanying drawings; however, the present disclosure is not limited to the specific details in the above embodiments. Within the technical concept of the present disclosure, a variety of simple modifications can be made to the technical solution of the present disclosure, and these simple modifications all fall within the protection scope of the present disclosure.
[0045] It should also be noted that the various specific technical features described in the above specific embodiments can be combined in any suitable manner without contradiction. In order to avoid unnecessary repetition, the present disclosure will not further describe various possible combinations.
[0046] In addition, various embodiments of the present disclosure may be arbitrarily combined, and as long as they do not violate the concept of the present disclosure, they should also be regarded as the contents disclosed by the present disclosure.
Claims
1. A photovoltaic panel cleanliness detection system, characterized in that: The detection system includes a first photovoltaic panel, a second photovoltaic panel, a controller, a first cleaning device, a second cleaning device, a first thermometer, a second thermometer, a first photometer, a second photometer and a power detection module; The first photovoltaic panel and the second photovoltaic panel are connected in series or in parallel, and the power detection module is used to detect the power of the first photovoltaic panel and the second photovoltaic panel; The first cleaning device is used to clean the surface of the first photovoltaic panel, and the second cleaning device is used to clean the surface of the second photovoltaic panel; The first thermometer is used to detect the temperature of the surface of the first photovoltaic panel, and the second thermometer is used to detect the temperature of the surface of the second photovoltaic panel; The first photometer is used to detect the light intensity at the first photovoltaic panel, and the second photometer is used to detect the light intensity at the second photovoltaic panel; Wherein, the first cleaning device, the second cleaning device, the first thermometer, the second thermometer, the first photometer, the second photometer and the power detection module are all electrically connected to the controller.
2. The photovoltaic panel cleanliness detection system according to claim 1, characterized in that: The first photovoltaic panel and the second photovoltaic panel are connected in series, and the power detection module includes a first voltmeter, a second voltmeter and a first ammeter; The first voltmeter is used to detect the voltage of the first photovoltaic panel, the second voltmeter is used to detect the voltage of the second photovoltaic panel, and the first ammeter is used to detect the current of the first photovoltaic panel and the second photovoltaic panel; Wherein, the first voltmeter, the second voltmeter and the first ammeter are all electrically connected to the controller.
3. The photovoltaic panel cleanliness detection system according to claim 1, characterized in that: The first photovoltaic panel and the second photovoltaic panel are connected in parallel, and the power detection module includes a second ammeter, a third ammeter and a third voltmeter; The second ammeter is used to detect the current of the first photovoltaic panel, the third ammeter is used to detect the current of the second photovoltaic panel, and the third voltmeter is used to detect the voltage of the first photovoltaic panel and the second photovoltaic panel; Wherein, the second ammeter, the third ammeter and the third voltmeter are all electrically connected to the controller.
4. The photovoltaic panel cleanliness detection system according to any one of claims 1 to 3, characterized in that: The first cleaning device and / or the second cleaning device comprises: a mounting bracket, a lead screw slider assembly, a drive motor and a cleaning brush; The screw and slider assembly comprises a screw and a slider, wherein the screw is rotatably and axially locked on the mounting bracket, and the slider is circumferentially locked and movably sleeved on the screw; The driving motor is arranged on the mounting bracket and is used to drive the lead screw to rotate. The cleaning brush is connected to the slider and can clean the first photovoltaic panel and / or the second photovoltaic panel.
5. The photovoltaic panel cleanliness detection system according to any one of claims 1 to 3, characterized in that: The detection system further includes an inverter, which is electrically connected to the first photovoltaic panel and the second photovoltaic panel.
6. A method for detecting cleanliness of a photovoltaic panel, characterized in that: The detection method is applied to the detection system described in any one of claims 1 to 5, and the detection method comprises: Selecting the first photovoltaic panel and the second photovoltaic panel connected in series or in parallel as reference photovoltaic panels; The controller controls the first cleaning device to clean the first photovoltaic panel, and controls the second cleaning device to clean the second photovoltaic panel; The controller determines a first temperature difference between the first photovoltaic panel and the second photovoltaic panel after cleaning by using the first thermometer and the second thermometer; The controller determines a first power difference between the first photovoltaic panel and the second photovoltaic panel after cleaning through the power detection module; The controller controls the first cleaning device to clean the first photovoltaic panel at first time intervals, and determines a second temperature difference and a second power difference between the first photovoltaic panel and the second photovoltaic panel; If the difference between the first temperature difference and the second temperature difference is greater than a first preset temperature, and / or the difference between the first power difference and the second power difference is greater than a first preset power, return to step 2; If the difference between the first temperature difference and the second temperature difference is not greater than the first preset temperature, and / or the difference between the first power difference and the second power difference is not greater than the first preset power, return to step 5.
7. The photovoltaic panel cleanliness detection method according to claim 6, characterized in that: The selecting the first photovoltaic panel and the second photovoltaic panel connected in series or in parallel as reference photovoltaic panels comprises: The voltage and current detection data fault limit ranges and the temperature detection data fault limit ranges of the first photovoltaic panel and the second photovoltaic panel are preset.
8. The photovoltaic panel cleanliness detection method according to claim 7, characterized in that: The selecting the first photovoltaic panel and the second photovoltaic panel connected in series or in parallel as reference photovoltaic panels also includes: The detection data out-of-limit ranges of the first photometer and the second photometer are preset.
9. The photovoltaic panel cleanliness detection method according to claim 8, characterized in that: After selecting the first photovoltaic panel and the second photovoltaic panel connected in series or in parallel as reference photovoltaic panels, the method further includes: The output voltage and current of the first photovoltaic panel and / or the second photovoltaic panel are detected, and when the corresponding values reach a fault standard, it is determined that the first photovoltaic panel and / or the second photovoltaic panel itself is faulty or the instrument is faulty.
10. The photovoltaic panel cleanliness detection method according to claim 9, characterized in that: After selecting the first photovoltaic panel and the second photovoltaic panel connected in series or in parallel as reference photovoltaic panels, the method further includes: The output data of the first photometer and / or the second photometer is detected, and when the data reaches a failure standard, the first photometer and / or the second photometer is determined to be faulty.