A method and device for numbering photovoltaic equipment in a photovoltaic power station

Abstract

The embodiment of the present invention discloses a numbering method and numbering device for photovoltaic equipment in a photovoltaic power station. The numbering method includes: obtaining a design drawing image and a first map image of the photovoltaic power station; identifying the logical position number of the photovoltaic string corresponding to the photovoltaic string in the design drawing image, and the first relative position relationship of the photovoltaic string; identifying the photovoltaic string in the first map image, and the second relative position relationship of the photovoltaic string, and numbering the photovoltaic string by the physical position; establishing a mapping relationship between the logical position number of the string and the physical position number of the string based on the consistency of the first relative position relationship and the second relative position relationship to form a first mapping. The technical solution of the embodiment of the present invention forms a mapping by identifying the logical position number and the physical position number of the photovoltaic string, thereby realizing the rapid positioning of the key components that cause the loss.

Description

Technical Field

[0001] The embodiments of the present invention relate to the technical field of photovoltaic power station fault location, and in particular to a method and device for numbering photovoltaic equipment in a photovoltaic power station. Background Art

[0002] Photovoltaic equipment in a photovoltaic power station includes photovoltaic strings and photovoltaic modules. During the operation and maintenance of a photovoltaic power station, photovoltaic module failures are inevitable. When a failure occurs, maintenance personnel must quickly reach the faulty module to repair or replace it to ensure efficient operation of the power station. Currently, many photovoltaic power stations use drones for inspections to identify GPS information at the fault point. However, due to the complex terrain, GPS navigation cannot provide a good route in complex environments such as mountainous or water-based power stations, making repair or replacement work very difficult for maintenance personnel.

[0003] Furthermore, the operation and maintenance of PV power plants also requires real-time forecasting, statistics, and analysis of power consumption and other indicators. Typically, these calculations are performed per combiner box, requiring that each module be arranged according to the order in which it is connected. However, due to factors such as geographic conditions, the order in which modules are connected to each combiner box varies, resulting in inconsistencies between the logical and physical location numbers of PV modules. When power consumption data indicates a PV module failure, only the logical location of the module can be determined, not its physical location. This significantly complicates repair or replacement efforts for maintenance personnel. Summary of the Invention

[0004] The embodiments of the present invention provide a method and device for numbering photovoltaic equipment in a photovoltaic power station, which are useful for quickly locating a fault position.

[0005] In a first aspect, an embodiment of the present invention provides a method for numbering photovoltaic devices in a photovoltaic power station, comprising:

[0006] Acquire a design drawing image and a first map image of a photovoltaic power station; wherein the design drawing image and the first map image include location information of photovoltaic strings;

[0007] Identify the string logical position number corresponding to the photovoltaic string in the design drawing image, and the first relative position relationship of the photovoltaic string;

[0008] Identifying photovoltaic strings in the first map image and a second relative position relationship of the photovoltaic strings, and numbering the photovoltaic strings by their physical positions;

[0009] According to the consistency of the first relative position relationship and the second relative position relationship, a mapping relationship between the string logical position number and the string physical position number is established to form a first mapping.

[0010] Optionally, identifying the string logical position number corresponding to the photovoltaic string in the design drawing image and the first relative position relationship of the photovoltaic strings includes:

[0011] Identify the string border in the design drawing image and calculate the first relative position relationship of the photovoltaic strings;

[0012] Identify the logical position number of the string in the design drawing image.

[0013] Optionally, an image morphology method is used to identify the string border;

[0014] And / or, an optical character recognition method is used to identify the logical position number of the string.

[0015] Optionally, an optical character recognition method is used to identify the logical position number of the string, including:

[0016] Cut the image according to the recognition result of the string frame to obtain the first frame image;

[0017] Preprocessing the first frame to obtain a second frame image;

[0018] Optical character recognition is performed on the second frame image to obtain a logical position number of the group string.

[0019] Optionally, the preprocessing includes at least one of: removing the border line of the first border image, enhancing the text content of the first border image, and expanding the size of the text image of the first border image.

[0020] Optionally, identifying the photovoltaic strings in the first map image and the second relative position relationship of the photovoltaic strings, and numbering the photovoltaic strings by physical position, includes:

[0021] Identifying a string frame in the first map image and calculating a second relative position relationship of the photovoltaic strings;

[0022] The photovoltaic strings are numbered at their physical positions according to the second relative position relationship.

[0023] Optional methods for identifying string borders include:

[0024] identifying a rectangular frame in the design drawing image or the first map image;

[0025] If the size of the rectangular border is within a preset threshold range, the rectangular border is determined to be a string border; otherwise, the rectangular border is removed.

[0026] Optionally, the first relative position relationship may be in the form of: each photovoltaic string is located in the Nth row and the Mth column; wherein N and M are positive integers;

[0027] The second relative position relationship includes: the position of each photovoltaic string is the Pth row and the Qth column; wherein P and Q are positive integers;

[0028] The first relative position relationship and the second relative position relationship are sorted in the same manner.

[0029] Optionally, the photovoltaic modules in the photovoltaic string are numbered to obtain relative position numbers of the modules;

[0030] Combining the string logical position number and the component relative position number, the component logical position number is obtained;

[0031] Combine the string physical position number and the module relative position number to obtain the module physical position number;

[0032] According to the consistency between the first relative position relationship and the second relative position relationship, a mapping relationship between the component logical position number and the component physical position number is established to form a second mapping.

[0033] Optionally, before numbering the PV modules in the PV strings, the following steps are also included:

[0034] A second map image is obtained; wherein the second map image and the first map image have the same data source, and the photovoltaic components in each photovoltaic string are numbered using the recognition result of the photovoltaic strings using the first map image.

[0035] Optionally, number the PV modules in the PV string, including:

[0036] intercepting an image of each photovoltaic string in the second map image according to the recognition result of the photovoltaic strings in the first map image;

[0037] Cutting the image of the photovoltaic string to obtain photovoltaic modules, and calculating the third relative position relationship of the photovoltaic modules;

[0038] The photovoltaic modules are numbered according to the third relative position relationship.

[0039] Optionally, the image of the photovoltaic string is cut to obtain photovoltaic modules, including:

[0040] The template matching method is used to identify photovoltaic modules in the images of photovoltaic strings;

[0041] Arrange the identified photovoltaic modules in a matrix according to a preset order;

[0042] Arrange all photovoltaic modules in the same row or column to form a row or column to be filled;

[0043] Filling the rows or columns to be filled with photovoltaic modules to form complete module rows or complete module columns;

[0044] Map complete module rows to all rows of PV strings, or map complete module columns to all columns of PV strings.

[0045] Optionally, the design drawing image is a computer-aided design drawing; and / or the first map image is a digital surface model.

[0046] Optionally, obtaining a digital surface model includes:

[0047] The UAV uses a terrain-simulating flight mode to collect map data of the photovoltaic power station and processes the map data to obtain a digital surface model.

[0048] Optionally, the string logical position numbering format includes: inverter number-combiner box number-first string number;

[0049] And / or, the form of the physical position number of the group string includes: array number-second group string number;

[0050] The inverter number, combiner box number and first component number are logically numbered according to the circuit connection relationship; the array number, string number and second component number are positionally numbered according to the physical position relationship.

[0051] Optionally, the inverter number and combiner box number are obtained from the configuration file from the inverter to the combiner box.

[0052] Optionally, the photovoltaic power station is divided into regions, and the photovoltaic devices in each region are numbered in sequence.

[0053] In a second aspect, an embodiment of the present invention further provides a device for numbering photovoltaic devices in a photovoltaic power station, the device comprising:

[0054] A data acquisition module is configured to acquire a design drawing image and a first map image of a photovoltaic power station; wherein the design drawing image and the first map image contain location information of photovoltaic strings;

[0055] A logic numbering module is used to identify the string logical position number corresponding to the photovoltaic string in the design drawing image, and the first relative position relationship of the photovoltaic string;

[0056] a physical numbering module, configured to identify the photovoltaic strings in the first map image and the second relative position relationship of the photovoltaic strings, and to number the photovoltaic strings at their physical positions;

[0057] The mapping module is used to establish a mapping relationship between the string logical position number and the string physical position number according to the consistency of the first relative position relationship and the second relative position relationship to form a first mapping.

[0058] The method for numbering photovoltaic devices in a photovoltaic power station provided by an embodiment of the present invention obtains a design drawing image and a first map image of the photovoltaic power station, identifies the logical string position numbers corresponding to the photovoltaic strings in the design drawing image, identifies the photovoltaic strings in the first map image, and assigns physical position numbers to the photovoltaic strings. Based on the consistency between the first relative position relationship corresponding to the logical string position number and the second relative position relationship corresponding to the physical string position number, a first mapping relationship between the logical string position number and the physical position number can be formed. Therefore, the embodiment of the present invention achieves automatic numbering of photovoltaic devices, significantly reducing the cost of manual labeling. Furthermore, the embodiment of the present invention not only establishes the logical string position number and the physical string position number, but also establishes a first mapping relationship between the two numbers. This allows operation and maintenance personnel to quickly locate the physical string position number based on the logical string position number, resolving the problem of being unable to locate the physical position based on the logical position number. Furthermore, providing the physical string position number facilitates operation and maintenance personnel in clearly identifying the physical location of the photovoltaic strings, enabling them to determine the route based on the physical string position number, even in complex terrain such as mountainous or surface power stations. Therefore, the embodiment of the present invention achieves the beneficial effect of quickly locating the fault position, which facilitates the inspection or maintenance work of the operation and maintenance personnel. BRIEF DESCRIPTION OF THE DRAWINGS

[0059] Figure 1 This is a flow chart of a method for numbering photovoltaic devices in a photovoltaic power station provided by an embodiment of the present invention;

[0060] Figure 2 is a schematic diagram of a design drawing image of a photovoltaic power station provided by an embodiment of the present invention;

[0061] Figure 3 is a schematic diagram of a first map image of a photovoltaic power station provided by an embodiment of the present invention;

[0062] Figure 4 This is a flow chart of another method for numbering photovoltaic devices in a photovoltaic power station provided by an embodiment of the present invention;

[0063] Figure 5 This is a flow chart of another method for numbering photovoltaic devices in a photovoltaic power station provided by an embodiment of the present invention;

[0064] Figure 6 This is a flow chart of another method for numbering photovoltaic devices in a photovoltaic power station provided by an embodiment of the present invention;

[0065] Figure 7 This is a flow chart of another method for numbering photovoltaic devices in a photovoltaic power station provided by an embodiment of the present invention;

[0066] Figure 8 This is a flow chart of another method for numbering photovoltaic devices in a photovoltaic power station provided by an embodiment of the present invention;

[0067] Figure 9 This is a flow chart of a method for identifying photovoltaic modules in a photovoltaic string provided by an embodiment of the present invention;

[0068] Figure 10 is a schematic diagram of a photovoltaic module logic filling process provided by an embodiment of the present invention;

[0069] Figure 11 This is a schematic diagram of the processing logic of a method for numbering photovoltaic devices in a photovoltaic power station provided by an embodiment of the present invention;

[0070] Figure 12 This is a structural diagram of a device for numbering photovoltaic equipment in a photovoltaic power station provided by an embodiment of the present invention. DETAILED DESCRIPTION

[0071] The present invention will be further described in detail below with reference to the accompanying drawings and examples. It will be understood that the specific embodiments described herein are intended only to illustrate the present invention and are not intended to limit the present invention. It should also be noted that, for ease of description, the accompanying drawings only illustrate portions relevant to the present invention, not all structures.

[0072] An embodiment of the present invention provides a method for numbering photovoltaic devices in a photovoltaic power station. The method can be performed by a device for numbering photovoltaic devices in the photovoltaic power station, and the device can be implemented by software and / or hardware. Figure 1 This is a flow chart of a method for numbering photovoltaic devices in a photovoltaic power station provided by an embodiment of the present invention. Figure 1 , the numbering method includes the following steps:

[0073] S110: Acquire a design drawing image and a first map image of a photovoltaic power station.

[0074] The design drawing image and the first map image contain the location information of the photovoltaic strings. For example, the design drawing image is a computer-aided design (CAD) drawing, and the location information of the photovoltaic strings contained in the design drawing image is circuit logic location information. Generally, these CAD drawings are retained after the photovoltaic power station is constructed and can be directly accessed. Figure 2 A schematic diagram of a design drawing image of a photovoltaic power station provided by an embodiment of the present invention is shown as follows: Figure 2As shown, the CAD drawing shows the relative positions of the individual strings, with each rectangular box representing a PV string. Each string is labeled with its corresponding string number. For example, string numbers are labeled according to the combiner box design, that is, according to circuit logic. For example, string numbers might be represented by 50-8-15, 50-9-6, 50-11-1, or 50-12-3, where 50-8, 50-9, 50-11, or 50-12 represent combiner box numbers. Therefore, the CAD drawing contains information about the circuit logic positions of the PV strings.

[0075] Optionally, the first map image is a digital surface model (DSM), and the location information of the photovoltaic strings included in the first map image is physical location information. The DSM is a ground elevation model that includes the heights of surface buildings, bridges, and trees. Figure 3 A schematic diagram of a first map image of a photovoltaic power station provided by an embodiment of the present invention is shown as follows: Figure 3 As shown in the figure, the color scale represents the height range from 9.96 meters to 22.65 meters. The DSM image is a ground elevation image processed from the actual map of the PV plant. It shows the relative position of each string. Each rectangle in the image represents a string. The DSM image is used to identify the physical location of the strings.

[0076] In an embodiment of the present invention, a DSM image can be captured by drone inspections, and the captured images can then be post-processed and rendered using software. Alternatively, for photovoltaic power plants, which are often located in complex and variable geographical environments such as mountains and hills, where the ground is uneven, drones can use a terrain-mimicking flight model to collect map data for the photovoltaic power plant. This processing ultimately generates a DSM image containing the height information of the power plant equipment. A terrain-mimicking flight model involves setting a fixed height relative to the known three-dimensional terrain during operation, ensuring a constant height difference between the drone and objects within the target area, thereby adapting to varying terrain conditions during operation. If a conventional drone uses a conventional flight model to collect data from a photovoltaic power plant located in complex terrain, such as mountains or hills, the resulting image will be affected by slopes and peaks and valleys, significantly complicating the identification and screening of photovoltaic strings and significantly reducing the accuracy of the identification results. Using a terrain-mimicking flight model, however, effectively mitigates the impact of complex terrain on data collection, eliminates the varying height differences in complex terrain, and facilitates subsequent image processing.

[0077] S120: Identify the string logical position numbers corresponding to the photovoltaic strings in the design drawing image, and the first relative position relationship of the photovoltaic strings.

[0078] Among them, the logical position numbers of the strings corresponding to the photovoltaic strings are arranged in the logical order of the circuit connection, that is, the string numbers are not numbered according to the physical row and column positions. For example, the logical position numbers are numbered according to the circuit connections of the inverter and the combiner box. The inverter is an inverter that can convert the variable DC voltage generated by the photovoltaic solar panel into AC power at the mains frequency, and can feed the electric energy back to the commercial transmission system or be used for off-grid power grids. The combiner box is a wiring device in the photovoltaic power generation system that ensures the orderly connection and return function of the photovoltaic components. It can ensure that the photovoltaic system is easy to cut off the circuit during maintenance and inspection, and reduce the scope of power outages when the photovoltaic system fails. In the logical circuit connection of the photovoltaic power station, multiple photovoltaic strings are combined into a combiner box, and multiple combiner boxes are connected to an inverter. The logical position numbers are numbered when designing the photovoltaic power station, such as Figure 2 As shown, this number will be marked on the design drawing, so just identify it.

[0079] Design drawings are used when designing a photovoltaic power station. However, during construction, due to varying site conditions, the actual placement of photovoltaic strings may differ from the design drawings. However, the relative positions of the components remain the same. For example, in the design drawings, the photovoltaic strings are arranged in a regular array. However, in reality, due to factors such as terrain, some of the photovoltaic strings may be offset. However, this offset is small and does not affect the relative positions of the photovoltaic strings.

[0080] For example, in the design drawing image, the first relative position relationship of each photovoltaic string can be expressed as follows: the position of each photovoltaic string is the Nth row and the Mth column; wherein N and M are positive integers. Figure 2 As shown, the string at row 1, column 1 is to the left of the string at row 1, column 2, and the string at row 2, column 1 is below the string at row 1, column 1. Figure 2 By identifying the photovoltaic strings in the array, the relative position relationship between the photovoltaic strings can be obtained, that is, the first relative position relationship.

[0081] S130: Identify the photovoltaic strings in the first map image and the second relative position relationship of the photovoltaic strings, and number the photovoltaic strings at their physical positions.

[0082] The physical position numbering of the photovoltaic strings is performed according to the row and column information of the physical position of each string, which complies with the rules of component connection and function analysis on the string. For example, the physical position numbering of the strings can be performed according to the array numbering. For example, the second relative position relationship of the photovoltaic strings in the first map image can be expressed as follows: the position of each photovoltaic string is the Pth row and the Qth column; wherein P and Q are positive integers. Figure 3As shown, the string at row 1, column 1 is to the left of the string at row 1, column 2, and the string at row 2, column 1 is below the string at row 1, column 1. Figure 3 By knowing the position of each string in the image, the relative position relationship between each photovoltaic string can be obtained, that is, the second relative position relationship. Since the string position number and the second relative position number can both represent the physical position information of the string, the string position number and the second relative position number can be the same number. It should be noted that since each rectangular string in the design drawing image is marked with its corresponding string logical position number, it is sufficient to identify the logical position number text marked on the string. The first map image reflects the actual string arrangement position map of the photovoltaic power station, and there is no physical position number of the string, so it is necessary to perform string physical position numbering on each string after identifying the photovoltaic strings on the first map image.

[0083] S140: Establish a mapping relationship between the string logical position number and the string physical position number based on the consistency of the first relative position relationship and the second relative position relationship to form a first mapping.

[0084] Among them, since the relative positions of each photovoltaic string represented by the first relative position relationship and the second relative position relationship are consistent, in the design drawing image and the first map image, the photovoltaic strings with the same first relative position relationship and the same second relative position relationship represent the same photovoltaic string, so the corresponding string logical position numbers and string physical position numbers also have a one-to-one correspondence, and a first mapping can be formed.

[0085] The method for numbering photovoltaic devices in a photovoltaic power station provided by an embodiment of the present invention obtains a design drawing image and a first map image of the photovoltaic power station, identifies the logical string position numbers corresponding to the photovoltaic strings in the design drawing image, identifies the photovoltaic strings in the first map image, and assigns physical position numbers to the photovoltaic strings. Based on the consistency between the first relative position relationship corresponding to the string logical position number and the second relative position relationship corresponding to the string physical position number, a first mapping relationship between the string logical position number and the physical position number can be formed. Therefore, the embodiment of the present invention achieves automatic numbering of photovoltaic devices, significantly reducing the cost of manual labeling. Furthermore, the embodiment of the present invention not only establishes the string logical position number and the string physical position number, but also establishes a first mapping relationship between the two numbers. This allows operation and maintenance personnel to quickly locate the string physical position number based on the string logical position number, resolving the problem of being unable to locate the physical position based on the logical position number. Furthermore, providing the string physical position number facilitates operation and maintenance personnel in clearly identifying the physical location of the photovoltaic strings, enabling them to determine the route based on the string physical position number even in complex terrain such as mountainous areas or water-based power stations. Therefore, the embodiment of the present invention achieves the beneficial effect of quickly locating the fault position, which facilitates the inspection or maintenance work of the operation and maintenance personnel.

[0086] In the above embodiments, there are multiple methods for identifying photovoltaic strings in the design drawing image, which are described in detail below but are not intended to limit the present invention.

[0087] Optional, Figure 4 A flow chart of another method for numbering photovoltaic devices in a photovoltaic power station provided by an embodiment of the present invention. Figure 4 , the numbering method includes the following steps:

[0088] S210: Acquire a design drawing image and a first map image of a photovoltaic power station.

[0089] S220: Identify the photovoltaic string frame in the design drawing image and calculate a first relative position relationship of the photovoltaic strings.

[0090] In the design drawing image, a photovoltaic string is represented by a rectangular frame, which is the string border. Therefore, the photovoltaic string can be identified by identifying the string border. Specifically, image morphology methods can be used to detect the edges of the rectangles in the design drawing image to identify the rectangular borders. However, not all rectangular frames in the design drawing image are string borders. Embodiments of the present invention can also use a threshold screening method to screen the rectangular borders according to screening conditions such as the width, height, and area of the rectangle, filtering out other types of rectangles.

[0091] S230: Identify the logical position number of the string in the design drawing image.

[0092] Among them, the logical position number of the string is marked inside or around the string frame. Specifically, the optical character recognition method (OCR) can be used to identify the logical position number of the photovoltaic string. OCR technology refers to the process in which an electronic device such as a scanner or digital camera examines the characters printed on paper, determines their shape by detecting dark and light patterns, and then uses a character recognition method to translate the shape into computer text. That is, for printed characters, an optical method is used to convert the text in the paper document into a black and white dot matrix image file, and the recognition software is used to convert the text in the image into a text format for further editing and processing by word processing software. The numbering result is obtained by using OCR technology to identify the logical position number text on each string in the design drawing image.

[0093] S240: Identify the photovoltaic strings in the first map image and the second relative position relationship of the photovoltaic strings, and number the photovoltaic strings at their physical positions.

[0094] S250: Establish a mapping relationship between the string logical position number and the string physical position number based on the consistency of the first relative position relationship and the second relative position relationship to form a first mapping.

[0095] In the above embodiments, there are multiple methods for identifying the logical position numbers of photovoltaic strings in the design drawing image, which are described in detail below but are not intended to limit the present invention.

[0096] Optional, Figure 5 A flow chart of another method for numbering photovoltaic devices in a photovoltaic power station provided by an embodiment of the present invention. Figure 5 , the numbering method includes the following steps:

[0097] S310: Acquire a design drawing image and a first map image of a photovoltaic power station.

[0098] S320: Identify the string frame in the design drawing image and calculate a first relative position relationship of the photovoltaic strings.

[0099] S330: Cut the image according to the recognition result of the string frame to obtain a first frame image.

[0100] Specifically, in OCR technology, the recognition results of the PV string frame are sliced to improve OCR recognition accuracy. For example, non-string frame portions are cut out, or the first frame image is sliced to include only one or a few string frames. If the identified logical position numbers are only for one or a few PV strings, the logical position numbers of different PV strings can be obtained by slicing the image multiple times at different positions.

[0101] S340: Preprocess the first frame to obtain a second frame image.

[0102] Among them, the preprocessing steps may include: removing the group border line to avoid misreading during OCR technology recognition; enhancing the text content of the first border image; expanding the text image size of the first border image to reduce the phenomenon of severe image deformation after inputting the OCR model, thereby improving the recognition accuracy of the OCR technology.

[0103] S350: Perform optical character recognition on the second frame image to obtain a logical position number of the group string.

[0104] The specific format of the string logical position number marked in the second frame diagram can be: inverter number - combiner box number - first string group number. For example, the inverter number and combiner box number are obtained from the inverter-to-combiner box configuration file. The configuration file can include which combiner boxes correspond to a certain inverter, for example: inverter number 1 can be connected to combiner boxes numbers 1-5.

[0105] S360: Identify the photovoltaic strings in the first map image and the second relative position relationship of the photovoltaic strings, and number the photovoltaic strings at their physical positions.

[0106] S370: Establish a mapping relationship between the string logical position number and the string physical position number based on the consistency of the first relative position relationship and the second relative position relationship to form a first mapping.

[0107] It can be seen that S310-S370 establishes a mapping relationship between the logical string position number and the physical string position number, which achieves the beneficial effect of quickly locating the fault location and facilitates the inspection or maintenance work of the operation and maintenance personnel.

[0108] In the above embodiments, there are multiple methods for numbering the physical positions of the photovoltaic strings in the first map image, which are described in detail below but are not intended to limit the present invention.

[0109] Optional, Figure 6A flow chart of another method for numbering photovoltaic devices in a photovoltaic power station provided by an embodiment of the present invention. Figure 6 , the numbering method includes the following steps:

[0110] S410: Acquire a design drawing image and a first map image of a photovoltaic power station.

[0111] S420: Identify the string logical position numbers corresponding to the photovoltaic strings in the design drawing image, and the first relative position relationship of the photovoltaic strings.

[0112] S430: Identify the photovoltaic string frame in the first map image, and calculate a second relative position relationship of the photovoltaic strings.

[0113] The first map image is a ground elevation model of a field photograph taken by a drone, generated through rendering and other processing procedures. This provides information about the locational relationships between various equipment and facilities within the PV power plant and the geographical environment. Similar to identifying string borders in design drawings, image morphology methods can be used to identify PV string borders in the first map image.

[0114] Optionally, after identifying the rectangular frame in the design drawing image or the first map image, the method further includes determining that the rectangular frame is a group frame if the size of the rectangular frame is within a preset threshold range; otherwise, removing the rectangular frame.

[0115] Specifically, the rectangular border identified using image morphology methods may not be a PV string border. To identify the string border, a preset threshold range can be set for the size of the PV string border in the design drawing image or the first map image to determine whether the identified rectangular border is a PV string border. If the size of the identified rectangular border does not meet any of the preset threshold ranges, it can be determined that the rectangular border is not a PV string border and can be removed.

[0116] S440: Number the photovoltaic strings at their physical positions according to the second relative position relationship.

[0117] Specifically, after determining the second relative position relationship of the PV strings in the first map image, the strings are physically numbered, thereby determining the physical position number of the PV strings at the second relative position relationship. The string physical position numbering format includes: array number - second string number. The array number and second string number are numbered based on the physical position relationship. The array number can be manually obtained by pre-dividing and numbering the area on the power station map. The second string number can be represented by the second relative position relationship of the PV strings.

[0118] S450: Establish a mapping relationship between the string logical position number and the string physical position number based on the consistency of the first relative position relationship and the second relative position relationship to form a first mapping.

[0119] Thus, it can be seen that S410-S450 number the physical positions of the strings in the first map image, forming a first mapping between the logical position numbers of the strings and the physical position numbers of the strings, which facilitates the operation and maintenance personnel to quickly and accurately inspect or repair the fault location.

[0120] In the above embodiments, the photovoltaic modules in the photovoltaic strings may be further numbered. There are various numbering methods. The numbering method of the photovoltaic modules is described in detail below, but is not intended to limit the present invention.

[0121] Optional, Figure 7 A flow chart of another method for numbering photovoltaic devices in a photovoltaic power station provided by an embodiment of the present invention. Figure 7 , the numbering method also includes:

[0122] S510: Acquire a design drawing image and a first map image of a photovoltaic power station.

[0123] S520: Identify the string logical position numbers corresponding to the photovoltaic strings in the design drawing image, and the first relative position relationship of the photovoltaic strings.

[0124] S530: Identify the photovoltaic strings in the first map image and the second relative position relationship of the photovoltaic strings, and number the photovoltaic strings at their physical positions.

[0125] S540: Establish a mapping relationship between the string logical position number and the string physical position number based on the consistency of the first relative position relationship and the second relative position relationship to form a first mapping.

[0126] S550: Number the photovoltaic modules in the photovoltaic string to obtain module relative position numbers.

[0127] Specifically, each PV string is composed of numerous PV modules. Significant power loss during normal operation of a PV string may be caused by a failure in one or more PV modules within the string. Therefore, to facilitate rapid location and repair of the failure, it is necessary not only to number the PV strings but also to number the PV modules within each string to determine their relative position.

[0128] S560: Combine the string logical position number and the component relative position number to obtain the component logical position number.

[0129] Specifically, the PV module number is an extension of the PV string number. That is, the module logical position number is structured as the string logical position number + the module relative position number. For example, the module logical position number is structured as follows: inverter number - combiner box number - first string number - first module number.

[0130] S570: Combine the string physical position number and the component relative position number to obtain the component physical position number.

[0131] Similar to the module logical position number, the module physical position number can also be expanded based on the string physical position number. That is, the module physical position number is structured as the string physical position number + the module relative position number. For example, the module physical position number consists of: array number - second string number - second module number. The array number, second string number, and second module number are numbered based on their physical location relationship. The array number can be obtained by dividing and numbering the areas on a power plant map.

[0132] S580: Establish a mapping relationship between the component logical position number and the component physical position number based on the consistency of the first relative position relationship and the second relative position relationship to form a second mapping.

[0133] Specifically, since modules are subordinate PV devices to strings, the first and second relative position relationships described above for the string mapping (first mapping) can also be used when establishing the mapping relationship between module logical position numbers and module physical position numbers (the second mapping). The first mapping represents the mapping relationship between each PV string in a PV power plant, while the second mapping represents the mapping relationship between each PV module in the PV power plant. Compared to the first mapping, the second mapping contains more elements.

[0134] It can be seen that S510-S580 has assigned logical position numbers and physical position numbers to the components, and established a second mapping relationship between the logical position numbers and the physical position numbers of the components, so that operation and maintenance personnel can quickly locate specific faulty components on the PV string, thereby improving operation and maintenance efficiency.

[0135] In the above embodiments, there are multiple methods for numbering the photovoltaic modules in the photovoltaic strings in the first map image, which are described in detail below but are not intended to limit the present invention.

[0136] Optional, Figure 8 A flow chart of another method for numbering photovoltaic devices in a photovoltaic power station provided by an embodiment of the present invention. Figure 8 , the numbering method also includes:

[0137] S610: Acquire a design drawing image and a first map image of a photovoltaic power station.

[0138] S620: Identify the string logical position number corresponding to the photovoltaic string in the design drawing image, and the first relative position relationship of the photovoltaic strings.

[0139] S630: Identify the photovoltaic strings in the first map image and the second relative position relationship of the photovoltaic strings, and number the photovoltaic strings at their physical positions.

[0140] S640: Establish a mapping relationship between the string logical position number and the string physical position number based on the consistency of the first relative position relationship and the second relative position relationship to form a first mapping.

[0141] S650: Obtain a second map image; wherein the second map image and the first map image have the same data source, and the photovoltaic components in each photovoltaic string are numbered using the photovoltaic string recognition result of the first map image.

[0142] Specifically, the data source of the first map image and the second map image is the same. For example, both are acquired by photographing and collecting the same preset area of a real photovoltaic power station by a drone. The first map image is a surface elevation image obtained after rendering and other processing, and the second map image is a photograph taken to identify the components in the photovoltaic strings and number them.

[0143] S660: Number the photovoltaic modules in the photovoltaic string to obtain module relative position numbers.

[0144] Exemplarily, numbering the photovoltaic components in a photovoltaic string includes: intercepting an image of each photovoltaic string in a second map image based on the recognition result of the photovoltaic string in the first map image; cutting the image of the photovoltaic string to obtain photovoltaic components, and calculating the third relative position relationship of the photovoltaic components; and numbering the photovoltaic components according to the third relative position relationship.

[0145] Specifically, the first map image is used to identify the PV string borders. Based on the identification results, the actual image of each PV string is extracted from the second map image. The complete PV string image is then sliced into rectangular arrangements to obtain a series of PV modules. The third relative position relationship of the PV modules is then calculated in a certain order. The third relative position relationship can be expressed as the row and column of the PV string. Finally, the PV modules are numbered based on the logical and physical position numbers of the PV strings and the third relative position relationship of the PV modules.

[0146] S670: Combine the string logical position number and the component relative position number to obtain the component logical position number.

[0147] S680: Combine the string physical position number and the component relative position number to obtain the component physical position number.

[0148] S690: Establish a mapping relationship between the component logical position number and the component physical position number based on the consistency of the first relative position relationship and the second relative position relationship to form a second mapping.

[0149] It can be seen that S610-S690 cuts the string image captured from the real power station map and numbers each component to make the numbering result more accurate.

[0150] In the above embodiments, there are multiple methods for identifying each photovoltaic module in a photovoltaic string, which are described in detail below but are not intended to limit the present invention.

[0151] Optional, Figure 9 This is a flow chart of a method for identifying photovoltaic modules in a photovoltaic string provided by an embodiment of the present invention. Based on the above embodiment, the method for identifying photovoltaic modules is further optimized. Figure 9 , the photovoltaic module identification method includes:

[0152] S710 : According to the recognition result of the photovoltaic strings in the first map image, capture the image of each photovoltaic string in the second map image.

[0153] S720: Identify photovoltaic modules in the image of the photovoltaic string using a template matching method.

[0154] Specifically, the template matching method selects a photo of a photovoltaic module, divides the photovoltaic modules through comparative analysis, and filters out duplicated and unqualified photovoltaic strings. However, this method has poor accuracy and is prone to failure to identify, so it is only suitable for the initial image cutting step. Figure 10 Schematic diagram of the photovoltaic module logic filling process provided by the embodiment of the present invention, see Figure 10 In step 2, template matching is used to perform preliminary panel segmentation. The components outlined in bold black lines in the figure are recognized, while those not outlined are unrecognized. Therefore, using template matching alone on a PV string can result in many panels not being recognized, leading to low accuracy.

[0155] S730: Arrange the identified photovoltaic modules in a matrix according to a preset order.

[0156] Specifically, the photovoltaic modules with identified rectangular frames are arranged according to their positional relationship in the matrix, that is, the modules are located in the row and column of the matrix on the photovoltaic string.

[0157] S740: Arrange all photovoltaic modules in the same row or column to form a row or column to be filled.

[0158] Specifically, see Figure 10 As shown in step 3, all photovoltaic modules identified on the string are arranged in the same row or column according to the length or width of the string to form a row or column to be filled, thereby completing the logical filling of the modules. All photovoltaic modules in all rows are arranged in the same row. For example, the horizontal coordinate of the upper left point of the module frame can be kept unchanged and the vertical coordinate can be unified, so that they can be arranged in the same row. Modules in the same row can be filled according to the width of the string. Similarly, it is also possible to arrange all photovoltaic modules in the same column. For example, the vertical coordinate of the upper left point of the module frame can be kept unchanged and the horizontal coordinate can be unified, so that they can be arranged in the same column. However, due to the size of the photovoltaic string, the length direction is generally larger than the width direction. Therefore, it is preferred to arrange all identified photovoltaic modules in the same row to form a row to be filled. This can reduce the amount of logical filling and improve the cutting accuracy of the overall photovoltaic modules.

[0159] S750 , filling the rows or columns to be filled with photovoltaic modules to form complete module rows or complete module columns.

[0160] Specifically, for a to-be-filled row or column of photovoltaic modules, unfilled positions can be directly filled using the size of adjacent modules, thereby forming a complete module row or a complete module column.

[0161] S760: Map complete component rows to all rows of photovoltaic strings, or map complete component columns to all columns of photovoltaic strings.

[0162] Specifically, since the photovoltaic modules on the photovoltaic string are arranged in a rectangular shape, the complete module rows or columns formed can be used for one-to-one mapping to obtain all the modules on the photovoltaic string, thereby improving the accuracy of module cutting.

[0163] S770: Number the photovoltaic modules according to the third relative position relationship.

[0164] This shows that by using S710-S770 to identify and logically fill the borders of each component in the PV string, the amount of logical filling can be reduced, thereby improving the overall accuracy of PV component cutting.

[0165] Based on the above embodiment, the numbering method of the above photovoltaic devices is further optimized. Accordingly, the numbering method of the photovoltaic devices provided by the embodiment of the present invention further includes:

[0166] The photovoltaic power station is divided into regions, and the photovoltaic equipment in each region is numbered in turn.

[0167] Specifically, a typical photovoltaic power station has a large area, and the photovoltaic equipment therein is set up in different areas and is large in number. If all the photovoltaic equipment in the entire photovoltaic power station are directly numbered, the workload and difficulty will be very large, and the accuracy of the numbering will be greatly reduced. Therefore, before numbering the photovoltaic equipment, the map of the entire photovoltaic power station is manually divided into array areas of appropriate sizes. The size of the divided array areas can be adjusted accordingly based on the actual installation location of the photovoltaic equipment. There is no limit on the size of the array areas. After the entire photovoltaic power station is divided into areas, the array areas can be numbered in a certain order, and then the photovoltaic equipment in each area can be numbered in turn, which can greatly improve work efficiency and numbering accuracy.

[0168] Figure 11 This is a processing logic diagram of a method for numbering photovoltaic devices in a photovoltaic power station provided by an embodiment of the present invention. Figure 11 Based on the above embodiments, the processing logic of the numbering method includes processing the design drawing image (such as CAD), processing the first map image (such as DSM), and processing the second map image (such as power station map). The details are as follows:

[0169] The design drawing image (e.g., CAD) is processed, and the string frame is identified using image morphology methods. Then, the string logical position number is identified using optical character recognition (OCR) technology. The first map image (e.g., DSM) is processed, and the string frame is also identified using image morphology methods. The strings are then numbered physically based on their relative positions. After identifying the string frame in the design drawing image, the corresponding first relative position relationship is obtained. After identifying the string frame in the first map image, the corresponding second relative position relationship is obtained. Because the first and second relative positions are consistent, a first mapping relationship between the string logical position number and the string physical position number can be established.

[0170] When processing the second map image (e.g., a power plant map), image morphology methods are used to identify string borders. Since the first map image (e.g., DSM) and the second map image (e.g., power plant map) share the same data source, the string border identification results from the first map image can also be exported. The strings are then segmented, filtered, and padded to obtain the component numbers within the corresponding strings. The component numbers are combined with the string logical position numbers to obtain the logical position numbers of each component. The component numbers are combined with the string physical position numbers to obtain the physical position numbers of each component.

[0171] Figure 12This is a structural diagram of a numbering device for photovoltaic devices in a photovoltaic power station provided by an embodiment of the present invention. This embodiment can be applied to a numbering device for photovoltaic devices to perform the numbering method of the photovoltaic devices described above. Figure 12 , the numbering device 50 comprises:

[0172] The data acquisition module 10 is configured to acquire a design drawing image and a first map image of a photovoltaic power station; wherein the design drawing image and the first map image contain location information of photovoltaic strings;

[0173] The logic number module 20 is used to identify the string logical position number corresponding to the photovoltaic string in the design drawing image, and the first relative position relationship of the photovoltaic string;

[0174] A physical numbering module 30 is configured to identify the photovoltaic strings in the first map image and the second relative position relationship of the photovoltaic strings, and to number the photovoltaic strings at their physical positions;

[0175] The mapping module 40 is configured to establish a mapping relationship between the string logical position number and the string physical position number according to the consistency between the first relative position relationship and the second relative position relationship, so as to form a first mapping.

[0176] The photovoltaic equipment numbering device provided in the embodiment of the present invention can execute the photovoltaic equipment numbering method provided in any embodiment of the present invention, and has the corresponding functional modules and beneficial effects of the execution method.

[0177] Optionally, based on the above embodiment, the logic numbering module 20 in the photovoltaic equipment numbering device 50 provided in the embodiment of the present invention includes:

[0178] The identification and calculation unit is used to identify the string frame in the design drawing image and calculate the first relative position relationship of the photovoltaic strings; and identify the string logical position number in the design drawing image.

[0179] The image cutting unit is used to cut the image according to the recognition result of the group string frame to obtain a first frame image.

[0180] The pre-processing unit is used to remove the border line of the first border image, enhance the text content of the first border image, and expand the text image size of the first border image to obtain a second border image.

[0181] The optical character recognition unit is used to perform optical character recognition on the second frame image to obtain a group string logical position number.

[0182] Optionally, based on the above embodiment, the physical numbering module 30 in the photovoltaic equipment numbering device 50 provided in the embodiment of the present invention includes:

[0183] The recognition unit is configured to recognize the photovoltaic string frame in the first map image and calculate the second relative position relationship of the photovoltaic strings.

[0184] The numbering unit is used to number the physical positions of the photovoltaic strings according to the second relative position relationship.

[0185] Optionally, based on the above embodiments, the identification calculation unit in the logical numbering module 20 or the identification unit in the physical numbering module 30 in the photovoltaic equipment numbering device 50 provided in the embodiment of the present invention is also used to: identify the rectangular border in the design drawing image or the first map image; if the size of the rectangular border is within a preset threshold range, the rectangular border is determined to be a component border; otherwise, the rectangular border is removed.

[0186] Optionally, based on the above embodiment, the logical numbering module 20 in the photovoltaic device numbering apparatus 50 provided in the embodiment of the present invention is further configured to number the photovoltaic modules in the photovoltaic string to obtain module relative position numbers. The logical position numbers of the modules are obtained by combining the string logical position numbers with the module relative position numbers.

[0187] The physical numbering module 30 is further configured to combine the string physical position number and the component relative position number to obtain the component physical position number.

[0188] The mapping module 40 is further configured to establish a mapping relationship between the component logical position number and the component physical position number according to the consistency between the first relative position relationship and the second relative position relationship, thereby forming a second mapping.

[0189] Optionally, based on the above embodiment, the data acquisition module 10 in the photovoltaic equipment numbering device 50 provided in the embodiment of the present invention is further used to acquire a second map image.

[0190] Optionally, based on the above embodiment, the physical numbering module 30 in the photovoltaic equipment numbering device 50 provided in the embodiment of the present invention further includes:

[0191] The cutting unit is used to intercept the image of each photovoltaic string in the second map image according to the recognition result of the photovoltaic string in the first map image; cut the image of the photovoltaic string to obtain photovoltaic modules, and calculate the third relative position relationship of the photovoltaic modules.

[0192] The physical numbering module 30 is further configured to number the photovoltaic components according to the third relative position relationship.

[0193] Optionally, based on the above embodiment, the cutting unit in the physical numbering module 30 in the photovoltaic equipment numbering device 50 provided in the embodiment of the present invention includes:

[0194] The template matching subunit is used to identify photovoltaic components in the image of the photovoltaic string using a template matching method.

[0195] The arranging subunit is used to arrange the identified photovoltaic modules in a matrix according to a preset order; and to arrange all photovoltaic modules in the same row or column to form a row to be filled or a column to be filled.

[0196] The filling subunit is used to fill the rows or columns to be filled with photovoltaic modules to form complete module rows or complete module columns.

[0197] The mapping subunit is used to map a complete module row to all rows of a photovoltaic string, or to map a complete module column to all columns of a photovoltaic string.

[0198] Note that the above are only preferred embodiments of the present invention and the technical principles employed. Those skilled in the art will understand that the present invention is not limited to the specific embodiments described herein, and that various obvious changes, readjustments, and substitutions can be made by those skilled in the art without departing from the scope of protection of the present invention. Therefore, although the present invention has been described in detail through the above embodiments, the present invention is not limited to the above embodiments and may include many other equivalent embodiments without departing from the concept of the present invention. The scope of the present invention is determined by the scope of the appended claims.

Claims

1. A method for numbering photovoltaic equipment in a photovoltaic power station, characterized in that: include: Acquire a design drawing image and a first map image of the photovoltaic power station; wherein the design drawing image and the first map image contain location information of photovoltaic strings; Identifying a string logical position number corresponding to the photovoltaic string in the design drawing image, and a first relative position relationship of the photovoltaic string; wherein the first relative position relationship represents a row and column position of the photovoltaic string in the design drawing image; Identifying the photovoltaic strings in the first map image and a second relative position relationship of the photovoltaic strings, and numbering the photovoltaic strings by their physical positions; wherein the second relative position relationship represents the row and column positions of the photovoltaic strings in the first map image; According to the consistency of the first relative position relationship and the second relative position relationship, a mapping relationship between the logical position number of the string and the physical position number of the string is established to form a first mapping; The method for numbering photovoltaic devices in a photovoltaic power station further includes: Numbering the photovoltaic components in the photovoltaic string to obtain relative position numbers of the components; Combining the string logical position number and the component relative position number to obtain the component logical position number; Combining the physical position number of the string and the relative position number of the component to obtain the physical position number of the component; According to the consistency between the first relative position relationship and the second relative position relationship, a mapping relationship between the component logical position number and the component physical position number is established to form a second mapping; The step of numbering the photovoltaic components in the photovoltaic strings includes: Acquire a second map image; wherein the second map image and the first map image have the same data source, and use the first map image to identify the photovoltaic strings and number the photovoltaic modules in each photovoltaic string; intercepting an image of each photovoltaic string in the second map image according to a result of identifying the photovoltaic strings in the first map image; Cutting the image of the photovoltaic string to obtain the photovoltaic components, and calculating a third relative position relationship of the photovoltaic components; numbering the photovoltaic components according to the third relative position relationship; The step of cutting the image of the photovoltaic string to obtain the photovoltaic assembly includes: Using a template matching method to identify photovoltaic components in the image of the photovoltaic string; Arranging the identified photovoltaic modules in a matrix according to a preset order; Arranging all the photovoltaic modules in the same row or column to form a row to be filled or a column to be filled; Filling the to-be-filled rows or columns with the photovoltaic modules to form complete module rows or complete module columns; The complete component rows are mapped to all rows of the photovoltaic strings, or the complete component columns are mapped to all columns of the photovoltaic strings.

2. The method for numbering photovoltaic equipment in a photovoltaic power station according to claim 1, characterized in that: Identifying the string logical position number corresponding to the photovoltaic string in the design drawing image and the first relative position relationship of the photovoltaic string includes: Identifying a string frame in the design drawing image and calculating a first relative position relationship of the photovoltaic strings; Identify the logical position number of the string in the design drawing image.

3. The method for numbering photovoltaic equipment in a photovoltaic power station according to claim 2, characterized in that: Using image morphology method to identify the group string border; And / or, an optical character recognition method is used to identify the logical position number of the string.

4. The method for numbering photovoltaic equipment in a photovoltaic power station according to claim 3, characterized in that: The optical character recognition method is used to identify the logical position number of the string, including: Cutting the image according to the recognition result of the group string frame to obtain a first frame image; Preprocessing the first frame to obtain a second frame image; Optical character recognition is performed on the second frame image to obtain the logical position number of the group string.

5. The method for numbering photovoltaic equipment in a photovoltaic power station according to claim 4, characterized in that: The preprocessing includes at least one of: removing the border line of the first border image, enhancing the text content of the first border image, and expanding the size of the text image of the first border image.

6. The method for numbering photovoltaic equipment in a photovoltaic power station according to claim 1, characterized in that: Identifying the photovoltaic strings in the first map image and the second relative position relationship of the photovoltaic strings, and numbering the photovoltaic strings by their physical positions, includes: Identifying a string frame in the first map image and calculating a second relative position relationship of the photovoltaic strings; The photovoltaic strings are numbered at physical positions according to the second relative position relationship.

7. The method for numbering photovoltaic devices in a photovoltaic power station according to claim 2 or 6, characterized in that: The method for identifying the string border includes: Identifying a rectangular frame in the design drawing image or the first map image; If the size of the rectangular frame is within a preset threshold range, the rectangular frame is determined to be a string frame; otherwise, the rectangular frame is removed.

8. The method for numbering photovoltaic devices in a photovoltaic power station according to claim 1, characterized in that: The form of the first relative position relationship includes: the position of each photovoltaic string is the Nth row and the Mth column; wherein N and M are positive integers; The second relative position relationship includes: the position of each photovoltaic string is the Pth row and the Qth column; wherein P and Q are positive integers; The first relative position relationship and the second relative position relationship are arranged in the same manner.

9. The method for numbering photovoltaic devices in a photovoltaic power station according to claim 1, characterized in that: The design drawing image is a computer-aided design drawing; and / or the first map image is a digital surface model.

10. The method for numbering photovoltaic devices in a photovoltaic power station according to claim 9, characterized in that: The acquisition of the digital surface model includes: The UAV collects map data of the photovoltaic power station in a terrain-simulating flight mode, and processes the map data to obtain the digital surface model.

11. The method for numbering photovoltaic devices in a photovoltaic power station according to claim 1, characterized in that: The string logical position numbering format includes: inverter number-combiner box number-first string number; And / or, the form of the physical position number of the group string includes: array number-second group string number; The inverter number, the combiner box number and the first group string number are logically numbered according to the circuit connection relationship; the array number and the second group string number are positionally numbered according to the physical position relationship.

12. The method for numbering photovoltaic devices in a photovoltaic power station according to claim 11, characterized in that: The inverter number and the combiner box number are obtained through a configuration file from the inverter to the combiner box.

13. The method for numbering photovoltaic devices in a photovoltaic power station according to claim 1, characterized in that: Also includes: The photovoltaic power station is divided into regions, and the photovoltaic equipment in each region is numbered in sequence.

14. A device for numbering photovoltaic equipment in a photovoltaic power station, characterized in that: include: a data acquisition module, configured to acquire a design drawing image and a first map image of the photovoltaic power station; wherein the design drawing image and the first map image contain location information of the photovoltaic strings; a logic numbering module, configured to identify a string logical position number corresponding to the photovoltaic string in the design drawing image, and a first relative position relationship of the photovoltaic string; wherein the first relative position relationship represents a row and column position of the photovoltaic string in the design drawing image; a physical numbering module, configured to identify the photovoltaic strings in the first map image and a second relative position relationship of the photovoltaic strings, and to number the photovoltaic strings by their physical positions; wherein the second relative position relationship represents the row and column positions of the photovoltaic strings in the first map image; a mapping module, configured to establish a mapping relationship between the logical position number of the string and the physical position number of the string according to the consistency between the first relative position relationship and the second relative position relationship, so as to form a first mapping; The logic numbering module is further configured to number the photovoltaic components in the photovoltaic string to obtain a component relative position number; and to obtain a component logical position number by combining the string logical position number and the component relative position number. The physical numbering module is further configured to combine the string physical position number and the component relative position number to obtain a component physical position number; The mapping module is further configured to establish a mapping relationship between the component logical position number and the component physical position number based on the consistency between the first relative position relationship and the second relative position relationship to form a second mapping; The data acquisition module is further used to acquire a second map image; The physical numbering module further includes: a cutting unit, configured to intercept an image of each photovoltaic string in the second map image based on the recognition result of the photovoltaic strings in the first map image; cut the image of the photovoltaic string to obtain the photovoltaic modules, and calculate a third relative position relationship of the photovoltaic modules; A physical numbering module is further configured to number the photovoltaic components according to the third relative position relationship; The cutting unit comprises: a template matching subunit, configured to identify photovoltaic modules in the image of the photovoltaic string using a template matching method; An arranging subunit is used to arrange the identified photovoltaic modules in a matrix according to a preset order; and to arrange all the photovoltaic modules in the same row or column to form a row to be filled or a column to be filled; A filling subunit, configured to fill the to-be-filled row or column with the photovoltaic modules to form a complete module row or column; A mapping subunit is configured to map the complete component rows to all rows of the photovoltaic strings, or to map the complete component columns to all columns of the photovoltaic strings.

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