CN117176075A - Method and device for cleaning and detecting photovoltaic cell panel, photovoltaic power station and storage medium - Google Patents
Method and device for cleaning and detecting photovoltaic cell panel, photovoltaic power station and storage medium Download PDFInfo
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Abstract
The invention discloses a method and a device for cleaning and detecting a photovoltaic cell panel, a photovoltaic power station and a storage medium, wherein the method comprises the following steps: acquiring wind speed information and dust particle diameter information of an environment where a photovoltaic cell panel is located, and acquiring the area of the photovoltaic cell panel; inputting the wind speed information and the dust particle diameter information into a preset dust accumulation rate model to obtain dust deposition rates corresponding to the diameters of each dust particle; determining dust concentration on the photovoltaic cell panel according to dust deposition rate corresponding to each dust particle diameter, each dust particle diameter and the area of the photovoltaic cell panel; and inputting the dust concentration on the photovoltaic cell panel into a preset energy conversion efficiency model to obtain the energy conversion efficiency of the photovoltaic cell panel, and determining the cleaning frequency of the photovoltaic cell panel according to the energy conversion efficiency. The method can provide an effective cleaning period for the photovoltaic cell panel, thereby greatly reducing the electric quantity loss caused by dust to the photovoltaic power station.
Description
Technical Field
The invention relates to the technical field of photovoltaic systems, in particular to a cleaning and detecting method of a photovoltaic cell panel, a computer readable storage medium, a photovoltaic power station and a cleaning and detecting device of the photovoltaic cell panel.
Background
The photovoltaic power generation is a clean, environment-friendly, economical and efficient energy power generation technology, the global accumulated photovoltaic installed capacity is 760.4GW in 2020, and the installed capacity of at least 20 countries exceeds 1GW. Dust particles accumulate on the surface of the photovoltaic panel and combine with water drops or viscous substances in the air to form a dust layer, which significantly reduces the energy conversion efficiency and the service life of the photovoltaic panel. Research shows that dust can reduce the output of a photovoltaic system by 2% -10%, and the highest output can reach 25%. Therefore, research on dust deposition mechanisms on photovoltaic panel surfaces is critical to the formulation of cleaning strategies for the daily operation and maintenance of photovoltaic power stations.
In the related art, the conventional power station cleaning frequency is predicted by basically considering only the normal accumulation of dust (linear relation), and the influence of the dust particle size and wind speed on the dust accumulation is not considered, so that the provided cleaning cycle is inaccurate, and the generated energy of the dust to the photovoltaic power station is lost.
Disclosure of Invention
The present invention aims to solve at least one of the technical problems in the related art to some extent. Therefore, a first object of the present invention is to provide a method for cleaning and detecting a photovoltaic panel, which can determine the cleaning frequency of the photovoltaic panel according to the particle diameter of dust and the wind speed, so as to provide an effective cleaning period, thereby greatly reducing the electric quantity loss caused by dust to a photovoltaic power station.
A second object of the present invention is to propose a computer readable storage medium.
A third object of the invention is to propose a photovoltaic power plant.
The fourth aim of the invention is to provide a cleaning and detecting device for a photovoltaic cell panel.
In order to achieve the above object, an embodiment of a first aspect of the present invention provides a method for cleaning and detecting a photovoltaic cell panel, the method comprising: acquiring wind speed information and dust particle diameter information of an environment where the photovoltaic cell panel is located, and acquiring the area of the photovoltaic cell panel; inputting the wind speed information and the dust particle diameter information into a preset dust accumulation rate model to obtain dust deposition rates corresponding to the diameters of all dust particles; determining dust concentration on the photovoltaic cell panel according to dust deposition rate corresponding to each dust particle diameter, each dust particle diameter and the area of the photovoltaic cell panel; and inputting the dust concentration on the photovoltaic cell panel into a preset energy conversion efficiency model to obtain the energy conversion efficiency of the photovoltaic cell panel, and determining the cleaning frequency of the photovoltaic cell panel according to the energy conversion efficiency.
According to the cleaning detection method of the photovoltaic cell panel, firstly, wind speed information and dust particle diameter information of the environment where the photovoltaic cell panel is located are obtained, and the area of the photovoltaic cell panel is obtained; then inputting the wind speed information and the dust particle diameter information into a preset dust accumulation rate model to obtain dust deposition rates corresponding to the diameters of all dust particles; determining dust concentration on the photovoltaic cell panel according to dust deposition rate corresponding to each dust particle diameter, each dust particle diameter and the area of the photovoltaic cell panel; and finally, inputting the dust concentration on the photovoltaic cell panel into a preset energy conversion efficiency model to obtain the energy conversion efficiency of the photovoltaic cell panel, and determining the cleaning frequency of the photovoltaic cell panel according to the energy conversion efficiency. Therefore, the method can determine the cleaning frequency of the photovoltaic cell panel according to the particle diameter of dust and the wind speed so as to provide an effective cleaning period, thereby greatly reducing the electric quantity loss caused by dust to the photovoltaic power station.
In addition, the method for cleaning and detecting the photovoltaic cell panel according to the embodiment of the invention can also have the following additional technical characteristics:
according to one embodiment of the present invention, determining the dust concentration on the photovoltaic panel according to the dust deposition rate corresponding to each dust particle diameter, and the area of the photovoltaic panel includes: determining the dust quality on the photovoltaic cell panel according to the dust deposition rate corresponding to each dust particle diameter and each dust particle diameter; and determining the dust concentration on the photovoltaic cell panel according to the dust quality on the photovoltaic cell panel and the area of the photovoltaic cell panel.
According to one embodiment of the invention, the dust concentration on the photovoltaic panel is determined according to the following formula:
wherein C represents the dust concentration on the photovoltaic cell panel, n represents the number of dust particles, ρ represents the dust density, and d i Represents the diameter, lambda of the ith dust particle i The dust accumulation rate corresponding to the dust particles with the ith particle diameter, N k,i The number of dust particles with the ith particle diameter is represented by T, the sampling time is represented by A, the area of the photovoltaic cell panel is represented by T d Indicating the relaxation time of the particles.
According to one embodiment of the invention, the dust rate model is expressed according to the following formula:
wherein lambda is i And (3) representing the dust accumulation rate corresponding to the dust particles with the ith particle diameter, and v representing the wind speed information.
According to one embodiment of the invention, the energy conversion efficiency model is expressed according to the following formula:
wherein eta ac Represents the energy conversion efficiency, eta of the photovoltaic cell panel clean The reference conversion efficiency of the photovoltaic cell panel under the cleaning condition is shown, and a is the influence coefficient of dust accumulation.
According to one embodiment of the invention, the reference conversion efficiency of the photovoltaic panel under clean conditions is determined according to the following steps: obtaining the output voltage and the output current of the photovoltaic cell panel, and obtaining irradiance of the environment where the photovoltaic cell panel is positioned; and determining the reference conversion efficiency according to the output voltage and the output current of the photovoltaic cell panel, the irradiance and the area of the photovoltaic cell panel.
According to one embodiment of the invention, the reference conversion efficiency is determined according to the following formula:
wherein U represents the output voltage of the photovoltaic cell panel, I represents the output current of the photovoltaic cell panel, and G represents the irradiance of the environment where the photovoltaic cell panel is located.
To achieve the above object, a second aspect of the present invention provides a computer-readable storage medium having stored thereon a cleaning detection program for a photovoltaic panel, which when executed by a processor, implements the above-described cleaning detection method for a photovoltaic panel.
According to the computer readable storage medium provided by the embodiment of the invention, through the cleaning detection method of the photovoltaic cell panel, the cleaning frequency of the photovoltaic cell panel can be determined according to the particle diameter of dust and the wind speed, so that an effective cleaning period is provided, and the electric quantity loss caused by dust to the photovoltaic power station is greatly reduced.
To achieve the above object, an embodiment of a third aspect of the present invention provides a photovoltaic power station, including: the cleaning detection method for the photovoltaic cell panel comprises a memory, a processor and a cleaning detection program of the photovoltaic cell panel, wherein the cleaning detection program is stored in the memory and can run on the processor, and the cleaning detection method for the photovoltaic cell panel is realized when the processor executes the cleaning detection program.
According to the photovoltaic power station disclosed by the embodiment of the invention, through the cleaning detection method of the photovoltaic cell panel, the cleaning frequency of the photovoltaic cell panel can be determined according to the particle diameter of dust and the wind speed, so that an effective cleaning period is provided, and the electric quantity loss of the photovoltaic power station caused by dust is greatly reduced.
In order to achieve the above object, a fourth aspect of the present invention provides a cleaning and detecting device for a photovoltaic panel, including: the acquisition module is used for acquiring wind speed information and dust particle diameter information of the environment where the photovoltaic cell panel is located and acquiring the area of the photovoltaic cell panel; the dust accumulation rate determining module is used for inputting the wind speed information and the dust particle diameter information into a preset dust accumulation rate model to obtain dust accumulation rates corresponding to each dust particle diameter; the dust concentration determining module is used for determining dust concentration on the photovoltaic cell panel according to dust deposition rates corresponding to each dust particle diameter, each dust particle diameter and the area of the photovoltaic cell panel; the conversion efficiency determining module is used for inputting the dust concentration on the photovoltaic cell panel into a preset energy conversion efficiency model to obtain the energy conversion efficiency of the photovoltaic cell panel; and the cleaning detection module is used for determining the cleaning frequency of the photovoltaic cell panel according to the energy conversion efficiency.
According to the cleaning and detecting device for the photovoltaic cell panel, provided by the embodiment of the invention, the acquisition module acquires the wind speed information and the dust particle diameter information of the environment where the photovoltaic cell panel is positioned, and acquires the area of the photovoltaic cell panel; the dust accumulation rate determining module inputs the wind speed information and the dust particle diameter information into a preset dust accumulation rate model to obtain dust deposition rates corresponding to the diameters of all dust particles; the dust concentration determining module determines dust concentration on the photovoltaic cell panel according to dust deposition rates corresponding to the diameters of each dust particle, the diameters of each dust particle and the area of the photovoltaic cell panel; the conversion efficiency determining module inputs the dust concentration on the photovoltaic cell panel into a preset energy conversion efficiency model to obtain the energy conversion efficiency of the photovoltaic cell panel; and the cleaning detection module determines the cleaning frequency of the photovoltaic cell panel according to the energy conversion efficiency. Therefore, the device can determine the cleaning frequency of the photovoltaic cell panel according to the particle diameter of dust and the wind speed so as to provide an effective cleaning period, thereby greatly reducing the electric quantity loss caused by dust to the photovoltaic power station.
Additional aspects and advantages of the invention will be set forth in part in the description which follows and, in part, will be obvious from the description, or may be learned by practice of the invention.
Drawings
Fig. 1 is a flowchart of a method for cleaning and detecting a photovoltaic panel according to an embodiment of the present invention;
FIG. 2 is a block schematic diagram of a photovoltaic power plant according to an embodiment of the present invention;
fig. 3 is a block schematic diagram of a cleaning and detecting device for a photovoltaic cell panel according to an embodiment of the present invention.
Detailed Description
Embodiments of the present invention are described in detail below, examples of which are illustrated in the accompanying drawings, wherein like or similar reference numerals refer to like or similar elements or elements having like or similar functions throughout. The embodiments described below by referring to the drawings are illustrative and intended to explain the present invention and should not be construed as limiting the invention.
The following describes a cleaning and detecting method for a photovoltaic cell panel, a computer-readable storage medium, a photovoltaic power station and a cleaning and detecting device for a photovoltaic cell panel according to an embodiment of the present invention with reference to the accompanying drawings.
Fig. 1 is a flowchart of a method for cleaning and detecting a photovoltaic cell panel according to an embodiment of the present invention.
As shown in fig. 1, the method for cleaning and detecting a photovoltaic cell panel according to the embodiment of the invention may include the following steps:
s1, acquiring wind speed information and dust particle diameter information of an environment where a photovoltaic cell panel is located, and acquiring the area of the photovoltaic cell panel.
The controller of the photovoltaic cell panel can acquire the weather conditions of the environment through networking with a cloud or a server, so that the wind speed information and the air quality conditions of the environment can be obtained, and the types of dust particles suspended in the air and the diameters corresponding to the dust particles can be obtained. The controller of the photovoltaic cell panel stores the corresponding area of the photovoltaic cell panel.
S2, inputting the wind speed information and the dust particle diameter information into a preset dust accumulation rate model to obtain dust deposition rates corresponding to each dust particle diameter.
And S3, determining the dust concentration on the photovoltaic cell panel according to the dust deposition rate corresponding to each dust particle diameter, each dust particle diameter and the area of the photovoltaic cell panel.
S4, inputting the dust concentration on the photovoltaic cell panel into a preset energy conversion efficiency model, obtaining the energy conversion efficiency of the photovoltaic cell panel, and determining the cleaning frequency of the photovoltaic cell panel according to the energy conversion efficiency.
In particular, dust particles suspended in the atmosphere and their movement through the wind are the main cause of dust deposition on the photovoltaic panels. After acquiring the wind speed information and the dust particle diameter information of the environment where the photovoltaic cell panel is located, the controller inputs the wind speed information and the dust particle diameter information into a preset dust accumulation rate model, calculates according to the wind speed information and the dust particle diameter information corresponding to each dust particle diameter, and can obtain the dust deposition rate corresponding to each dust particle diameter. The controller calculates the total mass of dust of the photovoltaic cell panel according to the dust deposition rate corresponding to each dust particle diameter and each dust particle diameter, and then divides the total mass of dust by the area of the photovoltaic cell panel to obtain the dust concentration on the photovoltaic cell panel. After the dust concentration on the photovoltaic cell panel is obtained, the dust concentration is input into a preset energy conversion efficiency model by the controller for calculation, so that the energy conversion efficiency of the photovoltaic cell panel can be obtained, and then the cleaning frequency of the photovoltaic cell panel can be determined according to the energy conversion efficiency. For example, an energy conversion efficiency threshold may be set, and when the energy conversion efficiency is below the threshold, the controller may determine that cleaning of the photovoltaic panel is required.
According to one embodiment of the present invention, determining dust concentration on a photovoltaic cell panel according to dust deposition rate corresponding to each dust particle diameter, and an area of the photovoltaic cell panel includes: determining the dust quality on the photovoltaic cell panel according to the dust deposition rate corresponding to each dust particle diameter and each dust particle diameter; and determining the dust concentration on the photovoltaic cell panel according to the dust quality on the photovoltaic cell panel and the area of the photovoltaic cell panel.
Further, according to one embodiment of the present invention, the dust concentration on the photovoltaic panel is determined according to the following formula:
wherein C represents the dust concentration on the photovoltaic cell panel, n represents the number of types of dust particles, ρ represents the dust density, d i Represents the diameter, lambda of the ith dust particle i The dust accumulation rate corresponding to the dust particles with the ith particle diameter, N k,i The number of dust particles with the ith particle diameter is represented by T, the sampling time is represented by A, the area of the photovoltaic cell panel is represented by T d Indicating the relaxation time of the particles. The particle relaxation time refers to the time for dust particles to release energy and recover to a stable state after absorbing light energy on the surface of a photovoltaic cell panel, and can be obtained by simulating the processes of absorbing light energy and releasing light energy of the dust particles on the surface of the photovoltaic cell panel through experiments and measuring and analyzing the processes of absorbing and releasing light energy of the dust particles by using instruments such as a spectrometer, a fluorescence spectrometer and the like.
In particular, dust is composed of dust particles of many different sizes. The experimenter can install experimental devices with the same material and inclination angle in the same area where the photovoltaic cell panel is located, a special sampling device is used for collecting dust samples from the surface of the experimental device, then a particle size analyzer is used for analyzing the sampled dust samples to obtain information such as the number, the size and the shape of each dust particle, and finally the number N of each dust particle on the photovoltaic cell panel is determined according to the area ratio of the experimental device to the photovoltaic cell panel k,i . While the density of dust particles in the same environment can be regarded as the same, all being ρ. The mass m of dust on the photovoltaic panel can be calculated by the following formula:
wherein V is i The volume of the i-th particle diameter is shown.
Further, it is assumed that the dust particles are spherical and have a particle diameter d i Determining the dust mass on the photovoltaic cell panel according to the dust deposition rate corresponding to each dust particle diameter and each dust particle diameter, and the total mass m of dust accumulation t Can be expressed as:
the dust concentration on the photovoltaic cell panel is the total mass of dust particles per unit area, the area of the photovoltaic cell panel is A, the dust concentration on the photovoltaic cell panel can be obtained by dividing the dust mass on the photovoltaic cell panel by the area of the photovoltaic cell panel, and the dust concentration C can be expressed as:
according to one embodiment of the invention, the dust rate model is expressed according to the following equation:
wherein lambda is i The dust velocity corresponding to the dust particle of the i-th particle diameter is represented, and v represents wind velocity information.
Specifically, particles suspended in the atmosphere and their movement through the wind are the main cause of dust deposition on the photovoltaic panel, the deposition rate initially increasing and then decreasing with increasing dust particle diameter. By analyzing the relationship between particle diameter, wind speed and deposition rate, a dust deposition rate model can be established.
Specifically, assume that the normal distribution of dust accumulation rates is:
wherein λ represents a dust deposition rate, B represents a peak coefficient of the deposition rate, ω represents a dust dispersion coefficient, d represents a particle diameter, d c The average coefficient of the particle diameter is shown.
The deposition rate and deposition coefficient can be obtained by CFD (Computational Fluid Dynamics ) simulation results, wherein the dust deposition rate lambda of the ith particle diameter i The relationship with wind speed can be defined as:
among them, 192.31, 50, 45.27, 37.75, 38.46 are deposition coefficients.
Inputting the wind speed information and the i-th dust particle diameter information into a preset dust accumulation rate model to obtain dust deposition rate lambda corresponding to each dust particle diameter i 。
According to one embodiment of the present invention, the energy conversion efficiency model is expressed according to the following formula:
wherein eta ac Represents the energy conversion efficiency, eta of the photovoltaic cell panel clean The reference conversion efficiency of the photovoltaic cell panel under the cleaning condition is shown, and a is the influence coefficient of dust accumulation. Wherein, the influence coefficient of dust accumulation refers to the influence degree of dust accumulation on the photovoltaic module surface on the performance of the photovoltaic panel, and the output power, the illumination intensity and other parameters of the photovoltaic panel are monitored in real time by installing the photovoltaic panel monitoring system, and the dust accumulation degree is evaluated, so as to calculate the influence coefficient of dust accumulation。
Further, according to an embodiment of the invention, the reference conversion efficiency of the photovoltaic panel under clean conditions is determined according to the following steps: obtaining output voltage and output current of a photovoltaic cell panel, and obtaining irradiance of an environment where the photovoltaic cell panel is positioned; and determining the reference conversion efficiency according to the output voltage and the output current of the photovoltaic cell panel, irradiance and the area of the photovoltaic cell panel.
Further, according to one embodiment of the present invention, the reference conversion efficiency is determined according to the following formula:
wherein U represents the output voltage of the photovoltaic cell panel, I represents the output current of the photovoltaic cell panel, and G represents the irradiance of the environment where the photovoltaic cell panel is located.
Specifically, after the photovoltaic cell panel is installed or cleaned, the controller can obtain the output voltage U and the output current I of the photovoltaic cell panel, obtain the irradiance G of the environment where the photovoltaic cell panel is positioned, and substitute the output voltage U, the output current I, the irradiance G of the environment where the photovoltaic cell panel is positioned and the area A of the photovoltaic cell panel into the formula (4), so that the energy conversion efficiency of the photovoltaic cell panel under the cleaning condition, namely the reference conversion efficiency eta, can be obtained clean 。
Further, the energy conversion efficiency eta of the photovoltaic cell panel ac The relationship between the performance decay rate β can be defined as:
therefore, the conversion efficiency η ac Can be described as: η (eta) ac ＝η clean (1-β)。
Wherein, the relation between the performance attenuation rate beta of the photovoltaic cell panel and the dust concentration C can be expressed as follows:
β(C)＝1-e -a· substituting the formula into the above formula, andin combination with the above formula (1), it is possible to obtain:
the obtained energy conversion efficiency model is obtained. The energy conversion efficiency of the photovoltaic cell panel can be calculated by substituting the related parameters into the model, and the influence of different wind speeds, particle sizes and sampling periods on the energy conversion efficiency of the photovoltaic cell panel can be evaluated. When the sampling period is short, the influence of wind speed and particle diameter on the energy conversion efficiency of the photovoltaic cell panel is negligible, and the dust deposition amount on the photovoltaic cell panel is small. At the same wind speed and the same particle size, the energy conversion efficiency of the photovoltaic cell panel decreases with the extension of the deposition time. For the same deposition time, the energy conversion efficiency of the photovoltaic panel decreases with increasing particle diameter and then increases. With the increase of wind speed, more dust particles with larger diameters are deposited, and the energy conversion efficiency of the photovoltaic cell panel is remarkably reduced. When the particle diameter is smaller than 120mm, the low wind speed has a large influence on the conversion efficiency of the photovoltaic cell panel, and the energy conversion efficiency of the photovoltaic cell panel and the deposition time are in a linear relation. At a deposition time of 100 days, the maximum energy conversion efficiency of the photovoltaic cell panel was 11.3%.
Meanwhile, as the particle diameter increases, fewer particles are deposited at low wind speeds. At high wind speeds, the probability of lower conversion efficiency is greater, resulting in a maximum conversion efficiency loss of 72.9%. The results show that the model can be used to estimate the effect of dust accumulation on energy conversion efficiency. Therefore, the cleaning frequency of the photovoltaic cell panel can be determined, and the intelligent photovoltaic power station operation and maintenance are realized.
In summary, according to the method for detecting the cleaning of the photovoltaic cell panel provided by the embodiment of the invention, firstly, the wind speed information and the dust particle diameter information of the environment where the photovoltaic cell panel is located are obtained, and the area of the photovoltaic cell panel is obtained; then inputting the wind speed information and the dust particle diameter information into a preset dust accumulation rate model to obtain dust deposition rates corresponding to the diameters of all dust particles; determining dust concentration on the photovoltaic cell panel according to dust deposition rate corresponding to each dust particle diameter, each dust particle diameter and the area of the photovoltaic cell panel; and finally, inputting the dust concentration on the photovoltaic cell panel into a preset energy conversion efficiency model to obtain the energy conversion efficiency of the photovoltaic cell panel, and determining the cleaning frequency of the photovoltaic cell panel according to the energy conversion efficiency. Therefore, the method can determine the cleaning frequency of the photovoltaic cell panel according to the particle diameter of dust and the wind speed so as to provide an effective cleaning period, thereby greatly reducing the electric quantity loss caused by dust to the photovoltaic power station.
The present invention also proposes a computer-readable storage medium corresponding to the above-described embodiments.
The computer readable storage medium of the embodiment of the invention stores a cleaning detection program of the photovoltaic cell panel, and the cleaning detection program realizes the cleaning detection method of the photovoltaic cell panel when being executed by a processor.
According to the computer readable storage medium provided by the embodiment of the invention, through the cleaning detection method of the photovoltaic cell panel, the cleaning frequency of the photovoltaic cell panel can be determined according to the particle diameter of dust and the wind speed, so that an effective cleaning period is provided, and the electric quantity loss caused by dust to the photovoltaic power station is greatly reduced.
Corresponding to the embodiment, the invention also provides a photovoltaic power station.
Fig. 2 is a block schematic diagram of a photovoltaic power plant according to an embodiment of the present invention.
As shown in fig. 2, a photovoltaic power plant 200 according to an embodiment of the present invention includes: the processor 220 executes the cleaning detection program, and the processor 220 realizes the cleaning detection method of the photovoltaic cell panel.
According to the photovoltaic power station disclosed by the embodiment of the invention, through the cleaning detection method of the photovoltaic cell panel, the cleaning frequency of the photovoltaic cell panel can be determined according to the particle diameter of dust and the wind speed, so that an effective cleaning period is provided, and the electric quantity loss of the photovoltaic power station caused by dust is greatly reduced.
Corresponding to the embodiment, the invention further provides a cleaning and detecting device for the photovoltaic cell panel.
Fig. 3 is a block schematic diagram of a cleaning and detecting device for a photovoltaic cell panel according to an embodiment of the present invention.
As shown in fig. 3, the cleaning and detecting device 100 for a photovoltaic cell panel according to an embodiment of the present invention may include: an acquisition module 110, a dust rate determination module 120, a dust concentration determination module 130, a conversion efficiency determination module 140, and a cleaning detection module 150.
The acquiring module 110 is configured to acquire wind speed information and dust particle diameter information of an environment where the photovoltaic panel is located, and acquire an area of the photovoltaic panel. The dust deposition rate determining module 120 is configured to input the wind speed information and the dust particle diameter information into a preset dust deposition rate model, and obtain a dust deposition rate corresponding to each dust particle diameter. The dust concentration determination module 130 is configured to determine a dust concentration on the photovoltaic panel according to a dust deposition rate corresponding to each dust particle diameter, and an area of the photovoltaic panel. The conversion efficiency determining module 140 is configured to input the dust concentration on the photovoltaic panel into a preset energy conversion efficiency model, and obtain the energy conversion efficiency of the photovoltaic panel. The cleaning detection module 150 is configured to determine a cleaning frequency of the photovoltaic panel according to the energy conversion efficiency.
According to one embodiment of the present invention, the dust concentration determination module 130 determines the dust concentration on the photovoltaic cell panel according to the dust deposition rate corresponding to each dust particle diameter, and the area of the photovoltaic cell panel, and is specifically configured to determine the dust quality on the photovoltaic cell panel according to the dust deposition rate corresponding to each dust particle diameter and each dust particle diameter; and determining the dust concentration on the photovoltaic cell panel according to the dust quality on the photovoltaic cell panel and the area of the photovoltaic cell panel.
According to one embodiment of the invention, the dust concentration determination module 130 determines the dust concentration on the photovoltaic cell panel according to the following formula:
wherein C represents the dust concentration on the photovoltaic cell panel, n represents the number of types of dust particles, ρ represents the dust density, d i Represents the diameter, lambda of the ith dust particle i The dust accumulation rate corresponding to the dust particles with the ith particle diameter, N k,i The number of dust particles with the ith particle diameter is represented by T, the sampling time is represented by A, the area of the photovoltaic cell panel is represented by T d Indicating the relaxation time of the particles.
According to one embodiment of the invention, the dust rate model is expressed according to the following equation:
wherein lambda is i The dust velocity corresponding to the dust particle of the i-th particle diameter is represented, and v represents wind velocity information.
According to one embodiment of the present invention, the energy conversion efficiency model is expressed according to the following formula:
wherein eta ac Represents the energy conversion efficiency, eta of the photovoltaic cell panel clean The reference conversion efficiency of the photovoltaic cell panel under the cleaning condition is shown, and a shows the dust accumulation influence coefficient.
According to one embodiment of the present invention, the conversion efficiency determination module 140 determines the reference conversion efficiency of the photovoltaic panel under clean conditions according to the following steps: obtaining output voltage and output current of a photovoltaic cell panel, and obtaining irradiance of an environment where the photovoltaic cell panel is positioned; and determining the reference conversion efficiency according to the output voltage and the output current of the photovoltaic cell panel, irradiance and the area of the photovoltaic cell panel.
According to one embodiment of the invention, the conversion efficiency determination module 140 determines the reference conversion efficiency according to the following formula:
wherein U represents the output voltage of the photovoltaic cell panel, I represents the output current of the photovoltaic cell panel, and G represents the irradiance of the environment where the photovoltaic cell panel is located.
It should be noted that, for details not disclosed in the device for cleaning and detecting a photovoltaic cell panel in the embodiment of the present invention, please refer to details disclosed in the method for cleaning and detecting a photovoltaic cell panel in the embodiment of the present invention, and detailed descriptions thereof are omitted here.
According to the cleaning and detecting device for the photovoltaic cell panel, provided by the embodiment of the invention, the acquisition module acquires the wind speed information and the dust particle diameter information of the environment where the photovoltaic cell panel is positioned, and acquires the area of the photovoltaic cell panel; the dust accumulation rate determining module inputs the wind speed information and the dust particle diameter information into a preset dust accumulation rate model to obtain dust deposition rates corresponding to the diameters of all dust particles; the dust concentration determining module determines dust concentration on the photovoltaic cell panel according to dust deposition rates corresponding to the diameters of each dust particle, the diameters of each dust particle and the area of the photovoltaic cell panel; the conversion efficiency determining module inputs the dust concentration on the photovoltaic cell panel into a preset energy conversion efficiency model to obtain the energy conversion efficiency of the photovoltaic cell panel; and the cleaning detection module determines the cleaning frequency of the photovoltaic cell panel according to the energy conversion efficiency. Therefore, the device can determine the cleaning frequency of the photovoltaic cell panel according to the particle diameter of dust and the wind speed so as to provide an effective cleaning period, thereby greatly reducing the electric quantity loss caused by dust to the photovoltaic power station.
It should be noted that the logic and/or steps represented in the flowcharts or otherwise described herein, for example, may be considered as a ordered listing of executable instructions for implementing logical functions, and may be embodied in any computer-readable medium for use by or in connection with an instruction execution system, apparatus, or device, such as a computer-based system, processor-containing system, or other system that can fetch the instructions from the instruction execution system, apparatus, or device and execute the instructions. For the purposes of this description, a "computer-readable medium" can be any means that can contain, store, communicate, propagate, or transport the program for use by or in connection with the instruction execution system, apparatus, or device. More specific examples (a non-exhaustive list) of the computer-readable medium would include the following: an electrical connection (electronic device) having one or more wires, a portable computer diskette (magnetic device), a Random Access Memory (RAM), a read-only memory (ROM), an erasable programmable read-only memory (EPROM or flash memory), an optical fiber device, and a portable compact disc read-only memory (CDROM). In addition, the computer readable medium may even be paper or other suitable medium on which the program is printed, as the program may be electronically captured, via, for instance, optical scanning of the paper or other medium, then compiled, interpreted or otherwise processed in a suitable manner, if necessary, and then stored in a computer memory.
It is to be understood that portions of the present invention may be implemented in hardware, software, firmware, or a combination thereof. In the above-described embodiments, the various steps or methods may be implemented in software or firmware stored in a memory and executed by a suitable instruction execution system. For example, if implemented in hardware, as in another embodiment, may be implemented using any one or combination of the following techniques, as is well known in the art: discrete logic circuits having logic gates for implementing logic functions on data signals, application specific integrated circuits having suitable combinational logic gates, programmable Gate Arrays (PGAs), field Programmable Gate Arrays (FPGAs), and the like.
In the description of the present specification, a description referring to terms "one embodiment," "some embodiments," "examples," "specific examples," or "some examples," etc., means that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the present invention. In this specification, schematic representations of the above terms do not necessarily refer to the same embodiments or examples. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.
Furthermore, the terms "first," "second," and the like, are used for descriptive purposes only and are not to be construed as indicating or implying a relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defining "a first" or "a second" may explicitly or implicitly include at least one such feature. In the description of the present invention, the meaning of "plurality" means at least two, for example, two, three, etc., unless specifically defined otherwise.
In the present invention, unless explicitly specified and limited otherwise, the terms "mounted," "connected," "secured," and the like are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally formed; can be mechanically or electrically connected; either directly or indirectly, through intermediaries, or both, may be in communication with each other or in interaction with each other, unless expressly defined otherwise. The specific meaning of the above terms in the present invention can be understood by those of ordinary skill in the art according to the specific circumstances.
While embodiments of the present invention have been shown and described above, it will be understood that the above embodiments are illustrative and not to be construed as limiting the invention, and that variations, modifications, alternatives and variations may be made to the above embodiments by one of ordinary skill in the art within the scope of the invention.
Claims (10)
1. The method for cleaning and detecting the photovoltaic cell panel is characterized by comprising the following steps of:
acquiring wind speed information and dust particle diameter information of an environment where the photovoltaic cell panel is located, and acquiring the area of the photovoltaic cell panel;
inputting the wind speed information and the dust particle diameter information into a preset dust accumulation rate model to obtain dust deposition rates corresponding to the diameters of all dust particles;
determining dust concentration on the photovoltaic cell panel according to dust deposition rate corresponding to each dust particle diameter, each dust particle diameter and the area of the photovoltaic cell panel;
and inputting the dust concentration on the photovoltaic cell panel into a preset energy conversion efficiency model to obtain the energy conversion efficiency of the photovoltaic cell panel, and determining the cleaning frequency of the photovoltaic cell panel according to the energy conversion efficiency.
2. The method of claim 1, wherein determining the dust concentration on the photovoltaic panel based on the dust deposition rate for each dust particle diameter, and the area of the photovoltaic panel comprises:
determining the dust quality on the photovoltaic cell panel according to the dust deposition rate corresponding to each dust particle diameter and each dust particle diameter;
and determining the dust concentration on the photovoltaic cell panel according to the dust quality on the photovoltaic cell panel and the area of the photovoltaic cell panel.
3. The method according to claim 2, characterized in that the dust concentration on the photovoltaic panel is determined according to the following formula:
wherein C represents the dust concentration on the photovoltaic cell panel, n represents the number of dust particles, ρ represents the dust density, and d i Represents the diameter, lambda of the ith dust particle i The dust accumulation rate corresponding to the dust particles with the ith particle diameter, N k,i The number of dust particles with the ith particle diameter is represented by T, the sampling time is represented by A, the area of the photovoltaic cell panel is represented by T d Indicating the relaxation time of the particles.
4. A method according to any one of claims 1-3, wherein the dust rate model is expressed according to the following formula:
wherein lambda is i And (3) representing the dust accumulation rate corresponding to the dust particles with the ith particle diameter, and v representing the wind speed information.
5. A method according to any one of claims 1-3, characterized in that the energy conversion efficiency model is expressed according to the following formula:
wherein eta ac Represents the energy conversion efficiency, eta of the photovoltaic cell panel clean The reference conversion efficiency of the photovoltaic cell panel under the cleaning condition is shown, and a is the influence coefficient of dust accumulation.
6. The method of claim 5, wherein the reference conversion efficiency of the photovoltaic panel under clean conditions is determined according to the steps of:
obtaining the output voltage and the output current of the photovoltaic cell panel, and obtaining irradiance of the environment where the photovoltaic cell panel is positioned;
and determining the reference conversion efficiency according to the output voltage and the output current of the photovoltaic cell panel, the irradiance and the area of the photovoltaic cell panel.
7. The method of claim 6, wherein the reference conversion efficiency is determined according to the following equation:
wherein U represents the output voltage of the photovoltaic cell panel, I represents the output current of the photovoltaic cell panel, and G represents the irradiance of the environment where the photovoltaic cell panel is located.
8. A computer-readable storage medium, characterized in that a cleaning detection program of a photovoltaic panel is stored thereon, which cleaning detection program, when executed by a processor, implements the cleaning detection method of a photovoltaic panel according to any one of claims 1-7.
9. A photovoltaic power plant, comprising: the cleaning detection method for the photovoltaic cell panel comprises a memory, a processor and a cleaning detection program for the photovoltaic cell panel, wherein the cleaning detection program is stored in the memory and can be run on the processor, and the cleaning detection method for the photovoltaic cell panel is realized according to any one of claims 1-7 when the processor executes the cleaning detection program.
10. The utility model provides a clean detection device of photovoltaic cell board which characterized in that includes:
the acquisition module is used for acquiring wind speed information and dust particle diameter information of the environment where the photovoltaic cell panel is located and acquiring the area of the photovoltaic cell panel;
the dust accumulation rate determining module is used for inputting the wind speed information and the dust particle diameter information into a preset dust accumulation rate model to obtain dust accumulation rates corresponding to each dust particle diameter;
the dust concentration determining module is used for determining dust concentration on the photovoltaic cell panel according to dust deposition rates corresponding to each dust particle diameter, each dust particle diameter and the area of the photovoltaic cell panel;
the conversion efficiency determining module is used for inputting the dust concentration on the photovoltaic cell panel into a preset energy conversion efficiency model to obtain the energy conversion efficiency of the photovoltaic cell panel;
and the cleaning detection module is used for determining the cleaning frequency of the photovoltaic cell panel according to the energy conversion efficiency.
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN117978081A (en) * | 2024-04-01 | 2024-05-03 | 誉金新能源科技(山东)有限公司 | Photovoltaic array self-cleaning system |
| CN118017927A (en) * | 2024-04-10 | 2024-05-10 | 江苏顶晶融合电力工程有限公司 | Automatic cleaning method and system for photovoltaic panel |
| CN118074622A (en) * | 2024-04-17 | 2024-05-24 | 滁州捷泰新能源科技有限公司 | Automatic cleaning method for components based on electrical performance data of photovoltaic system |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN117978081A (en) * | 2024-04-01 | 2024-05-03 | 誉金新能源科技(山东)有限公司 | Photovoltaic array self-cleaning system |
| CN118017927A (en) * | 2024-04-10 | 2024-05-10 | 江苏顶晶融合电力工程有限公司 | Automatic cleaning method and system for photovoltaic panel |
| CN118017927B (en) * | 2024-04-10 | 2024-06-11 | 江苏顶晶融合电力工程有限公司 | Automatic cleaning method and system for photovoltaic panel |
| CN118074622A (en) * | 2024-04-17 | 2024-05-24 | 滁州捷泰新能源科技有限公司 | Automatic cleaning method for components based on electrical performance data of photovoltaic system |
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