Photovoltaic string division method and system of power generation unit

Abstract

The invention provides a photovoltaic string division method and system of a power generation unit. The method comprises the following steps: obtaining a capacity range of each photovoltaic string to be divided and a capacity demand value of the power generation unit; according to a preset searching path, sequentially searching the photovoltaic modules meeting the conditions, and when the photovoltaic modules meeting the conditions are found, judging whether the currently found photovoltaic group string is adjacent to the previous photovoltaic group string in the physical position or not; and if yes, determining whether the currently found photovoltaic string is divided into the power generation unit or not according to the power generation capacity and the space coordinates of the currently found photovoltaic string and the capacity demand value of the power generation unit. According to the technical scheme provided by the invention, the photovoltaic string can be reasonably divided, the cable consumption is reduced, and the overall efficiency is improved.

Description

Technical Field

[0001] The present application relates to the field of photovoltaic string division, and in particular to a method and system for dividing photovoltaic strings of a power generation unit. Background Art

[0002] The division of components into string inverters is a key step, which involves how to reasonably allocate various components to the inverter. This process needs to consider many factors. However, the existing division of photovoltaic components uses a lot of cables, which makes the overall efficiency low. Therefore, it is urgent to propose a photovoltaic component division scheme that can reduce the amount of cables. Summary of the invention

[0003] The present application provides a photovoltaic string division method and system for a power generation unit, so as to at least solve the technical problem that a large amount of cables are used, resulting in low overall efficiency.

[0004] A first aspect of the present application provides a method for dividing photovoltaic strings of a power generation unit, the method comprising:

[0005] Obtaining the capacity range of each photovoltaic string to be divided and the capacity demand value of the power generation unit;

[0006] Searching for qualified photovoltaic modules in sequence according to a preset search path, and when a qualified photovoltaic module is found, determining whether the currently found photovoltaic string is adjacent to the previous photovoltaic string in physical position;

[0007] If they are adjacent, it is determined whether the currently found photovoltaic string is divided into the power generation unit according to the power generation capacity, spatial coordinates and capacity demand value of the currently found photovoltaic string.

[0008] Preferably, the method further comprises:

[0009] If the currently found string is not adjacent to the previous string in physical position, the search continues based on the preset search path.

[0010] Furthermore, the step of determining whether the currently found photovoltaic string is physically adjacent to the previous photovoltaic string includes:

[0011] Obtain the spatial coordinates of the currently found photovoltaic string and the spatial coordinates of the previous photovoltaic string;

[0012] Determine the three-dimensional spatial distance between the currently found photovoltaic string and the previous photovoltaic string according to the spatial coordinates of the currently found photovoltaic string and the spatial coordinates of the previous photovoltaic string;

[0013] When the three-dimensional space distance is less than or equal to a first distance threshold, it is determined that the currently found photovoltaic string is adjacent to the previous photovoltaic string in physical position.

[0014] Further, determining whether the currently found photovoltaic string is divided into the power generation unit according to the power generation capacity, spatial coordinates and capacity requirement value of the currently found photovoltaic string includes:

[0015] Step F1: judging whether the photovoltaic string currently found meets the row and column arrangement requirements of the power generation unit according to the spatial coordinates of the photovoltaic string currently found, if so, proceeding to step F2, otherwise the photovoltaic string currently found is not divided into the power generation unit;

[0016] Step F2: Determine, based on the power generation capacity of the currently found photovoltaic string, whether the capacity of the power generation unit is less than or equal to the capacity requirement value of the power generation unit after the currently found photovoltaic string is added to the power generation unit. If so, assign the currently found photovoltaic string to the power generation unit.

[0017] The second embodiment of the present application provides a photovoltaic string division system for a power generation unit, comprising:

[0018] An acquisition module is used to acquire the capacity range of each photovoltaic string to be divided and the capacity demand value of the power generation unit;

[0019] A judgment module is used to search for qualified photovoltaic modules in sequence according to a preset search path, and when a qualified photovoltaic module is found, determine whether the currently found photovoltaic string is adjacent to the previous photovoltaic string in physical position;

[0020] The determination module is used to determine whether the currently found photovoltaic string is divided into the power generation unit according to the power generation capacity, spatial coordinates and capacity demand value of the currently found photovoltaic string if adjacent.

[0021] Preferably, the system further comprises:

[0022] The searching module is used to continue searching based on the preset searching path if the currently found string is not adjacent to the previous string in physical position.

[0023] Furthermore, the judgment module is also used for:

[0024] Obtain the spatial coordinates of the currently found photovoltaic string and the spatial coordinates of the previous photovoltaic string;

[0025] Determine the three-dimensional spatial distance between the currently found photovoltaic string and the previous photovoltaic string according to the spatial coordinates of the currently found photovoltaic string and the spatial coordinates of the previous photovoltaic string;

[0026] When the three-dimensional space distance is less than or equal to a first distance threshold, it is determined that the currently found photovoltaic string is adjacent to the previous photovoltaic string in physical position.

[0027] Furthermore, the determining module is also used for:

[0028] Step E1: judging whether the photovoltaic string currently found meets the row and column arrangement requirements of the power generation unit according to the spatial coordinates of the photovoltaic string currently found, if so, proceeding to step E2, otherwise the photovoltaic string currently found is not divided into the power generation unit;

[0029] Step E2: Determine, based on the power generation capacity of the currently found photovoltaic string, whether the capacity of the power generation unit is less than or equal to the capacity requirement value of the power generation unit after the currently found photovoltaic string is added to the power generation unit. If so, assign the currently found photovoltaic string to the power generation unit.

[0030] The third aspect of the present application provides an electronic device, comprising: a memory, a processor, and a computer program stored in the memory and executable on the processor, wherein when the processor executes the program, the method described in the first aspect is implemented.

[0031] A fourth aspect of the present application provides a computer-readable storage medium having a computer program stored thereon, which, when executed by a processor, implements the method described in the first aspect of the present application.

[0032] The technical solution provided by the embodiments of the present application brings at least the following beneficial effects:

[0033] The present application proposes a method and system for dividing photovoltaic strings of power generation units, the method comprising: obtaining the capacity range of each photovoltaic string to be divided and the capacity demand value of the power generation unit; searching for qualified photovoltaic components in sequence according to a preset search path, and after finding a qualified photovoltaic component, determining whether the currently found photovoltaic string is physically adjacent to the previous photovoltaic string; if adjacent, determining whether the currently found photovoltaic string is divided into the power generation unit according to the power generation capacity, spatial coordinates and capacity demand value of the currently found photovoltaic string. The technical solution proposed in the present application can reasonably divide photovoltaic strings, shorten the use of cables and improve overall efficiency.

[0034] Additional aspects and advantages of the present application will be given in part in the description below, and in part will become apparent from the description below, or will be learned through the practice of the present application. BRIEF DESCRIPTION OF THE DRAWINGS

[0035] The above and / or additional aspects and advantages of the present application will become apparent and easily understood from the following description of the embodiments in conjunction with the accompanying drawings, in which:

[0036] Figure 1 A flowchart of a photovoltaic string division method for a power generation unit provided according to an embodiment of the present application;

[0037] Figure 2 A first structural diagram of a photovoltaic string division system of a power generation unit provided according to an embodiment of the present application;

[0038] Figure 3 This is a second structural diagram of a photovoltaic string division system for a power generation unit provided according to an embodiment of the present application. DETAILED DESCRIPTION

[0039] The embodiments of the present application are described in detail below, and examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are intended to be used to explain the present application, and should not be construed as limiting the present application.

[0040] The present application proposes a method and system for dividing photovoltaic strings of power generation units, the method comprising: obtaining the capacity range of each photovoltaic string to be divided and the capacity demand value of the power generation unit; searching for qualified photovoltaic components in sequence according to a preset search path, and after finding a qualified photovoltaic component, determining whether the currently found photovoltaic string is physically adjacent to the previous photovoltaic string; if adjacent, determining whether the currently found photovoltaic string is divided into the power generation unit according to the power generation capacity, spatial coordinates and capacity demand value of the currently found photovoltaic string. The technical solution proposed in the present application can reasonably divide photovoltaic strings, shorten the use of cables, and improve overall efficiency.

[0041] A method and system for dividing photovoltaic strings of a power generation unit according to an embodiment of the present application will be described below with reference to the accompanying drawings.

[0042] Embodiment 1

[0043] Figure 1 A flowchart of a photovoltaic string division method for a power generation unit provided according to an embodiment of the present application, such as Figure 1 As shown, the method includes:

[0044] Step 1: Obtain the capacity range of each PV string to be divided and the capacity requirement value of the power generation unit.

[0045] Step 2: Search for qualified PV modules in sequence according to the preset search path. When a qualified PV module is found, determine whether the currently found PV string is physically adjacent to the previous PV string.

[0046] It should be noted that if the currently found string is not adjacent to the previous string in physical position, the search is continued based on the preset search path.

[0047] In the embodiment of the present disclosure, the step of determining whether the currently found photovoltaic string is physically adjacent to the previous photovoltaic string includes:

[0048] Obtain the spatial coordinates of the currently found photovoltaic string and the spatial coordinates of the previous photovoltaic string;

[0049] Determine a three-dimensional spatial distance d between the currently found photovoltaic string and the previous photovoltaic string according to the spatial coordinates of the currently found photovoltaic string and the spatial coordinates of the previous photovoltaic string;

[0050] When the three-dimensional space distance is less than or equal to a first distance threshold, it is determined that the currently found photovoltaic string is adjacent to the previous photovoltaic string in physical position.

[0051] It should be noted that when a photovoltaic string that meets the conditions is found, the next string is recursively searched according to the search direction (which may be in the order of rows or columns), that is, the search path.

[0052] Assuming that the spatial coordinates of the two photovoltaic strings are P1 (x1, y1, z1) and P2 (x2, y2, z2), the three-dimensional spatial distance d between the two photovoltaic strings is calculated as follows:

[0053]

[0054] Step 3: If adjacent, determine whether the currently found photovoltaic string is divided into the power generation unit according to the power generation capacity, spatial coordinates and capacity demand value of the currently found photovoltaic string.

[0055] In the embodiment of the present disclosure, step 3 specifically includes:

[0056] Step F1: judging whether the photovoltaic string currently found meets the row and column arrangement requirements of the power generation unit according to the spatial coordinates of the photovoltaic string currently found, if so, proceeding to step F2, otherwise the photovoltaic string currently found is not divided into the power generation unit;

[0057] The row and column arrangement requirements include: the strings are in the same row or column.

[0058] Step F2: Determine, based on the power generation capacity of the currently found photovoltaic string, whether the capacity of the power generation unit is less than or equal to the capacity requirement value of the power generation unit after the currently found photovoltaic string is added to the power generation unit. If so, assign the currently found photovoltaic string to the power generation unit.

[0059] It should be noted that if all current strings meet the row and capacity requirements, the search stops and these strings are marked as a complete power generation unit. Then, the search for the next power generation unit string begins and the above steps are repeated.

[0060] The traversal process is completed when all PV strings have been considered and all generating units have been found or it is determined that no more qualifying units can be found.

[0061] In summary, the photovoltaic string division method of a power generation unit proposed in this embodiment can reasonably divide the photovoltaic strings, shorten the usage of cables, and improve the overall efficiency.

[0062] Embodiment 2

[0063] Figure 2 A structural diagram of a photovoltaic string division system of a power generation unit provided according to an embodiment of the present application, such as Figure 2 As shown, the system comprises:

[0064] An acquisition module 100 is used to acquire the capacity range of each photovoltaic string to be divided and the capacity demand value of the power generation unit;

[0065] The judgment module 200 is used to sequentially search for qualified photovoltaic modules according to a preset search path, and when a qualified photovoltaic module is found, determine whether the currently found photovoltaic string is physically adjacent to the previous photovoltaic string;

[0066] The determination module 300 is used to determine whether the currently found photovoltaic string is divided into the power generation unit according to the power generation capacity, spatial coordinates and capacity demand value of the currently found photovoltaic string if adjacent.

[0067] In the embodiments of the present disclosure, Figure 3 As shown, the system also includes:

[0068] The searching module 400 is configured to continue searching based on the preset searching path if the currently found string is not adjacent to the previous string in physical position.

[0069] In the embodiment of the present disclosure, the determination module 200 is further used for:

[0070] Obtain the spatial coordinates of the currently found photovoltaic string and the spatial coordinates of the previous photovoltaic string;

[0071] Determine the three-dimensional spatial distance between the currently found photovoltaic string and the previous photovoltaic string according to the spatial coordinates of the currently found photovoltaic string and the spatial coordinates of the previous photovoltaic string;

[0072] When the three-dimensional space distance is less than or equal to a first distance threshold, it is determined that the currently found photovoltaic string is adjacent to the previous photovoltaic string in physical position.

[0073] In the embodiment of the present disclosure, the determination module 300 is further used to:

[0074] Step E1: judging whether the photovoltaic string currently found meets the row and column arrangement requirements of the power generation unit according to the spatial coordinates of the photovoltaic string currently found, if so, proceeding to step E2, otherwise the photovoltaic string currently found is not divided into the power generation unit;

[0075] Step E2: Determine, based on the power generation capacity of the currently found photovoltaic string, whether the capacity of the power generation unit is less than or equal to the capacity requirement value of the power generation unit after the currently found photovoltaic string is added to the power generation unit. If so, assign the currently found photovoltaic string to the power generation unit.

[0076] In summary, the photovoltaic string division system of a power generation unit proposed in this embodiment can reasonably divide the photovoltaic strings, shorten the usage of cables, and improve the overall efficiency.

[0077] Embodiment 3

[0078] In order to implement the above embodiments, the present disclosure further proposes an electronic device, including: a memory, a processor, and a computer program stored in the memory and executable on the processor, wherein when the processor executes the program, the method described in Embodiment 1 is implemented.

[0079] Embodiment 4

[0080] In order to implement the above embodiments, the present disclosure further proposes a computer-readable storage medium on which a computer program is stored. When the program is executed by a processor, the method described in the first embodiment is implemented.

[0081] In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "example", "specific example", or "some examples" etc. means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present application. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described may be combined in any one or more embodiments or examples in a suitable manner. In addition, those skilled in the art may combine and combine the different embodiments or examples described in this specification and the features of the different embodiments or examples, without contradiction.

[0082] Any process or method description in a flowchart or otherwise described herein may be understood to represent a module, fragment or portion of code comprising one or more executable instructions for implementing the steps of a custom logical function or process, and the scope of the preferred embodiments of the present application includes alternative implementations in which functions may not be performed in the order shown or discussed, including performing functions in a substantially simultaneous manner or in the reverse order depending on the functions involved, which should be understood by technicians in the technical field to which the embodiments of the present application belong.

[0083] Although the embodiments of the present application have been shown and described above, it can be understood that the above embodiments are exemplary and cannot be understood as limitations on the present application. Ordinary technicians in this field can change, modify, replace and modify the above embodiments within the scope of the present application.

Claims

1. A method for dividing photovoltaic strings of power generation units, characterized in that: The method comprises: Obtaining the capacity range of each photovoltaic string to be divided and the capacity demand value of the power generation unit; Searching for qualified photovoltaic modules in sequence according to a preset search path, and when a qualified photovoltaic module is found, determining whether the currently found photovoltaic string is adjacent to the previous photovoltaic string in physical position; If they are adjacent, it is determined whether the currently found photovoltaic string is divided into the power generation unit according to the power generation capacity, spatial coordinates and capacity demand value of the currently found photovoltaic string.

2. The method according to claim 1, characterized in that The method further comprises: If the currently found string is not adjacent to the previous string in physical position, the search continues based on the preset search path.

3. The method according to claim 2, characterized in that The step of determining whether the currently found photovoltaic string is physically adjacent to the previous photovoltaic string includes: Obtain the spatial coordinates of the currently found photovoltaic string and the spatial coordinates of the previous photovoltaic string; Determine the three-dimensional spatial distance between the currently found photovoltaic string and the previous photovoltaic string according to the spatial coordinates of the currently found photovoltaic string and the spatial coordinates of the previous photovoltaic string; When the three-dimensional space distance is less than or equal to a first distance threshold, it is determined that the currently found photovoltaic string is adjacent to the previous photovoltaic string in physical position.

4. The method according to claim 3, characterized in that The step of determining whether the currently found photovoltaic string is divided into the power generation unit according to the power generation capacity, spatial coordinates and capacity requirement value of the currently found photovoltaic string, comprises: Step F1: judging whether the photovoltaic string currently found meets the row and column arrangement requirements of the power generation unit according to the spatial coordinates of the photovoltaic string currently found, if so, proceeding to step F2, otherwise the photovoltaic string currently found is not divided into the power generation unit; Step F2: Determine, based on the power generation capacity of the currently found photovoltaic string, whether the capacity of the power generation unit is less than or equal to the capacity requirement value of the power generation unit after the currently found photovoltaic string is added to the power generation unit. If so, assign the currently found photovoltaic string to the power generation unit.

5. A photovoltaic string division system for a power generation unit, characterized in that: The system comprises: An acquisition module is used to acquire the capacity range of each photovoltaic string to be divided and the capacity demand value of the power generation unit; A judgment module is used to search for qualified photovoltaic modules in sequence according to a preset search path, and when a qualified photovoltaic module is found, determine whether the currently found photovoltaic string is adjacent to the previous photovoltaic string in physical position; The determination module is used to determine whether the currently found photovoltaic string is divided into the power generation unit according to the power generation capacity, spatial coordinates and capacity demand value of the currently found photovoltaic string if adjacent.

6. The system according to claim 5, characterized in that The system further comprises: The searching module is used to continue searching based on the preset searching path if the currently found string is not adjacent to the previous string in physical position.

7. The system according to claim 6, characterized in that The judging module is also used for: Obtain the spatial coordinates of the currently found photovoltaic string and the spatial coordinates of the previous photovoltaic string; Determine the three-dimensional spatial distance between the currently found photovoltaic string and the previous photovoltaic string according to the spatial coordinates of the currently found photovoltaic string and the spatial coordinates of the previous photovoltaic string; When the three-dimensional space distance is less than or equal to a first distance threshold, it is determined that the currently found photovoltaic string is adjacent to the previous photovoltaic string in physical position.

8. The system according to claim 7, characterized in that The determining module is also used for: Step E1: judging whether the photovoltaic string currently found meets the row and column arrangement requirements of the power generation unit according to the spatial coordinates of the photovoltaic string currently found, if so, proceeding to step E2, otherwise the photovoltaic string currently found is not divided into the power generation unit; Step E2: Determine, based on the power generation capacity of the currently found photovoltaic string, whether the capacity of the power generation unit is less than or equal to the capacity requirement value of the power generation unit after the currently found photovoltaic string is added to the power generation unit. If so, assign the currently found photovoltaic string to the power generation unit.

9. An electronic device, characterized in that: include: A memory, a processor, and a computer program stored in the memory and executable on the processor, wherein when the processor executes the program, the method according to any one of claims 1 to 4 is implemented.

10. A computer-readable storage medium having a computer program stored thereon, characterized in that: When the program is executed by a processor, the method according to any one of claims 1 to 4 is implemented.

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