Photovoltaic module series optimization method, device and system
By determining the set of photovoltaic string connection methods and selecting the photovoltaic string connection method with the closest current characteristics, the problem of inconsistent output of photovoltaic modules caused by shading is solved, the series mismatch loss is reduced, and the stability and safety of the photovoltaic system are improved.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Patents(China)
- Current Assignee / Owner
- HEFEI SUNGROW RENEWABLE ENERGY SCI & TECH CO LTD
- Filing Date
- 2022-11-25
- Publication Date
- 2026-06-16
Smart Images
Figure CN115842516B_ABST
Abstract
Description
Technical Field
[0001] This invention relates to the field of photovoltaic technology, and in particular to a method, apparatus and system for optimizing the series connection of photovoltaic modules. Background Technology
[0002] With the rapid development of the photovoltaic industry, the integration of photovoltaics and buildings is becoming increasingly close. BIPV (Building Integrated Photovoltaics) technology is being used more and more widely. However, in practical applications, high-rise buildings often create significant shading between each other. When traditional linear and C-shaped photovoltaic module series optimization methods are affected by shading, the output current of the photovoltaic modules becomes inconsistent. The significant differences in output characteristics between photovoltaic modules can cause series mismatch losses, and in severe cases, it can lead to hot spot effects, reducing the stability and safety of the photovoltaic system.
[0003] Therefore, how to reduce the series mismatch loss between photovoltaic modules when shaded is an urgent problem to be solved. Summary of the Invention
[0004] The main objective of this invention is to propose a method, apparatus, and system for optimizing the series connection of photovoltaic modules, aiming to solve the problem of how to reduce the loss caused by series mismatch between photovoltaic modules when shading occurs.
[0005] To achieve the above objectives, the present invention provides a photovoltaic module series optimization method, which includes the following steps:
[0006] Determine the target area and calculate the set of photovoltaic string connection methods corresponding to the target area;
[0007] Determine the target current characteristic correlation of each photovoltaic string connection method in the set of photovoltaic string connection methods;
[0008] Based on the target current characteristic correlation, the target photovoltaic string connection method is determined from the set of photovoltaic string connection methods;
[0009] Based on the target photovoltaic module stringing method, the photovoltaic modules in the target area are controlled to be connected in series.
[0010] Optionally, the step of calculating the set of photovoltaic string connection methods corresponding to the target area includes:
[0011] According to the preset numbering rules, each photovoltaic module in the target area is numbered, and the total number of photovoltaic modules in the target area and the number of photovoltaic modules in the photovoltaic string are obtained.
[0012] Based on the total number of photovoltaic modules, the number of photovoltaic modules in a photovoltaic string, and the serial number of the photovoltaic modules, determine the set of photovoltaic string connection methods corresponding to the target area.
[0013] Optionally, the step of determining the set of photovoltaic string connection methods corresponding to the target area based on the total number of photovoltaic modules, the number of photovoltaic modules in the photovoltaic string, and the serial number of the photovoltaic modules includes:
[0014] Based on the total number of photovoltaic modules and the number of photovoltaic modules in the photovoltaic string, the photovoltaic modules in the target area are randomly grouped to obtain a set of photovoltaic string combinations;
[0015] Obtain the order of photovoltaic modules in each photovoltaic string in the photovoltaic string combination set;
[0016] Based on the photovoltaic module number, the number of photovoltaic modules in the photovoltaic string, and the arrangement order, the photovoltaic string combination set is adjusted, and based on the adjusted photovoltaic string combination set, the photovoltaic string connection method set corresponding to the target area is determined.
[0017] Optionally, the step of adjusting the photovoltaic string combination set according to the photovoltaic module number, the number of photovoltaic modules in the photovoltaic string, and the arrangement order includes:
[0018] Based on the number of the photovoltaic module, the number of photovoltaic modules in the photovoltaic string, and the arrangement order, determine whether there is a photovoltaic string with non-adjacent photovoltaic modules in each photovoltaic string combination in the photovoltaic string combination set;
[0019] If they exist, then based on the number of the photovoltaic module connected to the non-adjacent photovoltaic module in the photovoltaic string, the adjacent photovoltaic module is determined in the corresponding photovoltaic string combination, and the non-adjacent photovoltaic module is adjusted to become the adjacent photovoltaic module.
[0020] Optionally, the step of determining whether there are photovoltaic strings with non-adjacent photovoltaic modules in each photovoltaic string combination set based on the photovoltaic module number, the number of photovoltaic modules in the photovoltaic string, and the arrangement order includes:
[0021] Select one photovoltaic string combination from the set of photovoltaic string combinations in sequence;
[0022] Obtain the arrangement order of photovoltaic modules in the selected photovoltaic string combination, and calculate the difference between the numbers of every two photovoltaic modules in the photovoltaic string;
[0023] If the difference is equal to the number of photovoltaic modules in the photovoltaic string or equal to a preset threshold, then it is determined that there is no photovoltaic string in the selected photovoltaic string combination where the photovoltaic modules are not adjacent.
[0024] If there exists a difference that is neither equal to the number of photovoltaic modules in the photovoltaic string nor equal to the preset threshold, then it is determined that there is a photovoltaic string in the selected photovoltaic string combination where the photovoltaic modules are not adjacent.
[0025] Optionally, the step of determining the set of photovoltaic string connection methods corresponding to the target area based on the adjusted set of photovoltaic string combinations includes:
[0026] Get each photovoltaic string combination in the adjusted photovoltaic string combination set, and get the number and arrangement order of the photovoltaic modules contained in each photovoltaic string in each photovoltaic string combination;
[0027] Based on the numbering and arrangement order of the photovoltaic modules contained in each photovoltaic string, determine the set of photovoltaic string connection methods corresponding to the target area.
[0028] Optionally, the step of determining the target current characteristic correlation of each photovoltaic string connection method in the set of photovoltaic string connection methods includes:
[0029] Obtain historical environmental information of the target area, and sequentially select a set of photovoltaic string connection methods from the set of photovoltaic string connection methods;
[0030] The correlation of current characteristics of each photovoltaic string in the selected photovoltaic string stringing method is determined based on the historical environmental information.
[0031] The sum is calculated based on the current characteristic correlation of each photovoltaic string, and the target current characteristic correlation of the selected photovoltaic string connection method is determined based on the sum.
[0032] Optionally, the step of determining the current characteristic correlation of each photovoltaic string in the selected photovoltaic string connection method based on the historical environmental information includes:
[0033] Based on the historical environmental information, the current output characteristic curve of each photovoltaic module in the target area is calculated;
[0034] Based on the current output characteristic curve, the correlation of current characteristics between every two adjacent photovoltaic modules in each photovoltaic string is calculated.
[0035] The current characteristic correlation between every two adjacent photovoltaic modules in each photovoltaic string is multiplied to obtain a product, and the current characteristic correlation of each photovoltaic string in the selected photovoltaic string connection method is determined based on the product.
[0036] Optionally, the step of determining the target photovoltaic string connection method from the set of photovoltaic string connection methods based on the target current characteristic correlation includes:
[0037] The correlation of the target current characteristics of each photovoltaic string connection method in the set of photovoltaic string connection methods is compared to determine the maximum correlation of the target current characteristics.
[0038] The photovoltaic string connection method with the largest target current characteristic correlation is selected from the set of photovoltaic string connection methods as the target photovoltaic string connection method.
[0039] Optionally, the step of controlling the photovoltaic modules in the target area to be connected in series based on the target photovoltaic module string connection method includes:
[0040] Obtain each target photovoltaic string in the target photovoltaic string stringing method, and obtain the number and arrangement order of the photovoltaic modules in each target photovoltaic string;
[0041] Based on the number of the photovoltaic module in each target photovoltaic string, the corresponding photovoltaic module in the target area is determined, and the photovoltaic modules in the target area are connected in series according to the arrangement order of the photovoltaic modules in each target photovoltaic string.
[0042] Furthermore, to achieve the above objectives, the present invention also provides a photovoltaic module series optimization device, the photovoltaic module series optimization device comprising:
[0043] The calculation module is used to determine the target area and calculate the set of photovoltaic string connection methods corresponding to the target area;
[0044] The first determining module is used to determine the target current characteristic correlation of each photovoltaic string connection method in the photovoltaic string connection method set.
[0045] The second determining module is used to determine the target photovoltaic string connection method from the set of photovoltaic string connection methods based on the target current characteristic correlation.
[0046] The control module is used to control the photovoltaic modules in the target area to be connected in series based on the target photovoltaic string connection method.
[0047] Furthermore, the computing module is also used for:
[0048] According to the preset numbering rules, each photovoltaic module in the target area is numbered, and the total number of photovoltaic modules in the target area and the number of photovoltaic modules in the photovoltaic string are obtained.
[0049] Based on the total number of photovoltaic modules, the number of photovoltaic modules in a photovoltaic string, and the serial number of the photovoltaic modules, determine the set of photovoltaic string connection methods corresponding to the target area.
[0050] Furthermore, the computing module is also used for:
[0051] Based on the total number of photovoltaic modules and the number of photovoltaic modules in the photovoltaic string, the photovoltaic modules in the target area are randomly grouped to obtain a set of photovoltaic string combinations;
[0052] Obtain the order of photovoltaic modules in each photovoltaic string in the photovoltaic string combination set;
[0053] Based on the photovoltaic module number, the number of photovoltaic modules in the photovoltaic string, and the arrangement order, the photovoltaic string combination set is adjusted, and based on the adjusted photovoltaic string combination set, the photovoltaic string connection method set corresponding to the target area is determined.
[0054] Furthermore, the computing module is also used for:
[0055] Based on the number of the photovoltaic module, the number of photovoltaic modules in the photovoltaic string, and the arrangement order, determine whether there is a photovoltaic string with non-adjacent photovoltaic modules in each photovoltaic string combination in the photovoltaic string combination set;
[0056] If they exist, then based on the number of the photovoltaic module connected to the non-adjacent photovoltaic module in the photovoltaic string, the adjacent photovoltaic module is determined in the corresponding photovoltaic string combination, and the non-adjacent photovoltaic module is adjusted to become the adjacent photovoltaic module.
[0057] Furthermore, the computing module is also used for:
[0058] Select one photovoltaic string combination from the set of photovoltaic string combinations in sequence;
[0059] Obtain the arrangement order of photovoltaic modules in the selected photovoltaic string combination, and calculate the difference between the numbers of every two photovoltaic modules in the photovoltaic string;
[0060] If the difference is equal to the number of photovoltaic modules in the photovoltaic string or equal to a preset threshold, then it is determined that there is no photovoltaic string in the selected photovoltaic string combination where the photovoltaic modules are not adjacent.
[0061] If there exists a difference that is neither equal to the number of photovoltaic modules in the photovoltaic string nor equal to the preset threshold, then it is determined that there is a photovoltaic string in the selected photovoltaic string combination where the photovoltaic modules are not adjacent.
[0062] Furthermore, the computing module is also used for:
[0063] Get each photovoltaic string combination in the adjusted photovoltaic string combination set, and get the number and arrangement order of the photovoltaic modules contained in each photovoltaic string in each photovoltaic string combination;
[0064] Based on the numbering and arrangement order of the photovoltaic modules contained in each photovoltaic string, determine the set of photovoltaic string connection methods corresponding to the target area.
[0065] Furthermore, the first determining module is also used for:
[0066] Obtain historical environmental information of the target area, and sequentially select a set of photovoltaic string connection methods from the set of photovoltaic string connection methods;
[0067] The correlation of current characteristics of each photovoltaic string in the selected photovoltaic string stringing method is determined based on the historical environmental information.
[0068] The sum is calculated based on the current characteristic correlation of each photovoltaic string, and the target current characteristic correlation of the selected photovoltaic string connection method is determined based on the sum.
[0069] Furthermore, the first determining module is also used for:
[0070] Based on the historical environmental information, the current output characteristic curve of each photovoltaic module in the target area is calculated;
[0071] Based on the current output characteristic curve, the correlation of current characteristics between every two adjacent photovoltaic modules in each photovoltaic string is calculated.
[0072] The current characteristic correlation between every two adjacent photovoltaic modules in each photovoltaic string is multiplied to obtain a product, and the current characteristic correlation of each photovoltaic string in the selected photovoltaic string connection method is determined based on the product.
[0073] Furthermore, the second determining module is also used for:
[0074] The correlation of the target current characteristics of each photovoltaic string connection method in the set of photovoltaic string connection methods is compared to determine the maximum correlation of the target current characteristics.
[0075] The photovoltaic string connection method with the largest target current characteristic correlation is selected from the set of photovoltaic string connection methods as the target photovoltaic string connection method.
[0076] Furthermore, the control module is also used for:
[0077] Obtain each target photovoltaic string in the target photovoltaic string stringing method, and obtain the number and arrangement order of the photovoltaic modules in each target photovoltaic string;
[0078] Based on the number of the photovoltaic module in each target photovoltaic string, the corresponding photovoltaic module in the target area is determined, and the photovoltaic modules in the target area are connected in series according to the arrangement order of the photovoltaic modules in each target photovoltaic string.
[0079] In addition, to achieve the above objectives, the present invention also provides a photovoltaic module series optimization system, the photovoltaic module series optimization system comprising: a memory, a processor, and a photovoltaic module series optimization program stored in the memory and executable on the processor, wherein when the photovoltaic module series optimization program is executed by the processor, it implements the steps of the photovoltaic module series optimization method as described above.
[0080] In addition, to achieve the above objectives, the present invention also provides a storage medium storing a photovoltaic module series optimization program, which, when executed by a processor, implements the steps of the photovoltaic module series optimization method as described above.
[0081] This invention proposes a photovoltaic (PV) module series connection optimization method. The method involves determining a target region and calculating a set of PV string connection methods corresponding to that region; determining the target current characteristic correlation of each PV string connection method in the set; determining a target PV string connection method from the set based on the target current characteristic correlation; and controlling the PV modules in the target region to be connected in series based on the target PV string connection method. This invention determines the target PV string connection method by identifying the target current characteristic correlation of each PV string connection method in the set, thereby determining the PV string connection method with the closest current characteristics between PV modules, thus reducing the series mismatch loss between PV modules caused by shading. Attached Figure Description
[0082] Figure 1 This is a flowchart illustrating the first embodiment of the photovoltaic module series optimization method of the present invention;
[0083] Figure 2 This is a schematic diagram of the photovoltaic modules connected in series in the target area of the present invention;
[0084] Figure 3 This is a flowchart illustrating the second embodiment of the photovoltaic module series optimization method of the present invention;
[0085] Figure 4 This is a schematic diagram of adjacent photovoltaic modules in the target area of this invention;
[0086] Figure 5 This is a schematic diagram illustrating the adjustment of non-adjacent photovoltaic modules in a photovoltaic string according to the present invention;
[0087] Figure 6This is a schematic diagram of the photovoltaic module series optimization device of the present invention.
[0088] The realization of the objective, functional features and advantages of the present invention will be further explained in conjunction with the embodiments and with reference to the accompanying drawings. Detailed Implementation
[0089] Reference Figure 1 , Figure 1 This is a flowchart illustrating the first embodiment of the photovoltaic module series optimization method of the present invention, the method comprising:
[0090] Step S10: Determine the target area and calculate the set of photovoltaic string connection methods corresponding to the target area;
[0091] Step S20: Determine the target current characteristic correlation of each photovoltaic string connection method in the set of photovoltaic string connection methods;
[0092] Step S30: Based on the target current characteristic correlation, determine the target photovoltaic string connection method from the set of photovoltaic string connection methods;
[0093] Step S40: Based on the target photovoltaic array stringing method, control the photovoltaic modules in the target area to be connected in series.
[0094] This embodiment of the photovoltaic module series optimization method is applied to a photovoltaic module series optimization system in a photovoltaic power plant. This photovoltaic module series optimization system can be applied to intelligent devices such as terminal devices and PC terminals. For ease of description, the photovoltaic module series optimization system is used as an example. The photovoltaic module series optimization system determines the target area, which is usually the area where photovoltaic modules are set in the photovoltaic power plant, and calculates all possible series connection methods for all photovoltaic modules in the target area to obtain a set of photovoltaic string connection methods. The photovoltaic module series optimization system calculates the current output characteristic curve corresponding to each photovoltaic module in the target area, determines the current characteristic correlation of all possible photovoltaic strings based on the current output characteristic curve of each photovoltaic module, and then determines the target current characteristic correlation of each photovoltaic string connection method in the set of photovoltaic string connection methods based on the current characteristic correlation of all possible photovoltaic strings. The photovoltaic module series optimization system compares the target current characteristic correlation of each photovoltaic string connection method, determines the target photovoltaic string connection method in the set of photovoltaic string connection methods, and controls the photovoltaic modules in the target area to be connected in series based on the target photovoltaic string connection method.
[0095] This embodiment of the photovoltaic module series optimization method determines a target region and calculates the set of photovoltaic string connection methods corresponding to the target region; determines the target current characteristic correlation of each photovoltaic string connection method in the set of photovoltaic string connection methods; determines a target photovoltaic string connection method in the set of photovoltaic string connection methods based on the target current characteristic correlation; and controls the photovoltaic modules in the target region to be connected in series based on the target photovoltaic string connection method. This invention calculates the current output characteristic curve corresponding to each photovoltaic module in the target region using historical environmental information, determines the current characteristic correlation of all possible photovoltaic strings based on the current output characteristic curve of each photovoltaic module, determines the target current characteristic correlation of each photovoltaic string connection method in the set of photovoltaic string connection methods based on the current characteristic correlation of all possible photovoltaic strings, determines the target current characteristic correlation of each photovoltaic string connection method in the set of photovoltaic string connection methods based on the target current characteristic correlation, determines the target photovoltaic string connection method based on the target current characteristic correlation, and then determines the photovoltaic string connection method with the closest current characteristics between photovoltaic modules, thereby reducing the series mismatch loss between photovoltaic modules caused by shading.
[0096] The following will provide a detailed explanation of each step:
[0097] Step S10: Determine the target area and calculate the set of photovoltaic string connection methods corresponding to the target area;
[0098] In this embodiment, the photovoltaic module series optimization system determines the target area and calculates the set of photovoltaic string connection methods corresponding to the target area. It should be noted that the set of photovoltaic string connection methods includes all possible photovoltaic string connection methods in the target area. A photovoltaic string connection method refers to a set of photovoltaic strings composed of a preset number of pairs of adjacent photovoltaic modules in the target area. For example, if the target area includes 40 photovoltaic modules, it is stipulated that every 8 pairs of adjacent photovoltaic modules form a photovoltaic string. That is, each photovoltaic string connection method corresponding to the target area includes 5 photovoltaic strings, and the target area can generate multiple photovoltaic string connection methods to obtain the set of photovoltaic string connection methods.
[0099] Specifically, step S10 includes:
[0100] Step a: Number each photovoltaic module in the target area according to the preset numbering rules, and obtain the total number of photovoltaic modules in the target area and the number of photovoltaic modules in the photovoltaic string;
[0101] In this step, the photovoltaic module series optimization system numbers each photovoltaic module in the target area according to a preset numbering rule, and obtains the total number of photovoltaic modules in the target area and the number of photovoltaic modules in the photovoltaic string. For example, if the target area includes 40 photovoltaic modules, and the photovoltaic modules in the target area are arranged in a matrix of 5 rows and 8 columns, the photovoltaic module series optimization system sets the number of the photovoltaic module located in the first row and first column to 1, the number of the photovoltaic module located in the first row and second column to 2, the number of the photovoltaic module located in the first row and eighth column to 8, the number of the photovoltaic module located in the second row and first column to 9, and so on, to complete the numbering of each photovoltaic module in the target area.
[0102] Step b: Determine the set of photovoltaic string connection methods corresponding to the target area based on the total number of photovoltaic modules, the number of photovoltaic modules in the photovoltaic string, and the number of the photovoltaic modules.
[0103] In this step, the photovoltaic module series optimization system calculates all possible photovoltaic strings in the target area based on the total number of photovoltaic modules in the target area, the number of photovoltaic modules in the photovoltaic string, and the number of photovoltaic modules. Based on all possible photovoltaic strings, it determines the set of photovoltaic string connection methods.
[0104] Further, step b includes:
[0105] Step b1: Based on the total number of photovoltaic modules and the number of photovoltaic modules in the photovoltaic string, randomly group the photovoltaic modules in the target area to obtain a photovoltaic string combination set;
[0106] In this step, the photovoltaic module series optimization system calculates the number of groups based on the total number of photovoltaic modules in the target area and the number of photovoltaic modules in the photovoltaic string. Based on the number of groups, the photovoltaic modules in the target area are randomly grouped to obtain a set of photovoltaic string combinations. It should be noted that the set of photovoltaic string combinations includes multiple photovoltaic string combinations corresponding to the target area. For example, if the target area contains 40 photovoltaic modules arranged in a 5x8 matrix, the photovoltaic module series optimization system divides the total number of photovoltaic modules (40) by the number of photovoltaic modules in the photovoltaic string (8) to calculate the number of groups as 5. That is, each grouping divides every 8 photovoltaic modules in the target area into a group, resulting in 5 photovoltaic strings. These 5 photovoltaic strings form a photovoltaic string combination. After the photovoltaic module series optimization system has calculated all possible groupings, it obtains the set of photovoltaic string combinations.
[0107] Step b2: Obtain the arrangement order of photovoltaic modules in each photovoltaic string in the photovoltaic string combination set;
[0108] Step b3: Adjust the photovoltaic string combination set according to the photovoltaic module number, the number of photovoltaic modules in the photovoltaic string and the arrangement order, and determine the photovoltaic string connection mode set corresponding to the target area based on the adjusted photovoltaic string combination set.
[0109] In steps b2 to b3, the photovoltaic module series optimization system sequentially selects a photovoltaic string combination from the photovoltaic string combination set and obtains the arrangement order and number of the photovoltaic modules contained in each photovoltaic string in the photovoltaic string combination. Based on the number of photovoltaic modules in the photovoltaic strings corresponding to the target area, and the arrangement order and number of the photovoltaic modules contained in each photovoltaic string in the photovoltaic string combination, it determines whether there are non-adjacent photovoltaic modules in each photovoltaic string in the photovoltaic string combination. If so, it adjusts all non-adjacent photovoltaic modules in all photovoltaic strings in the photovoltaic string combination so that all photovoltaic modules in all photovoltaic strings in the photovoltaic string combination are adjacent to each other, thereby completing the adjustment of the photovoltaic string combination set. Based on the adjusted photovoltaic string combination set, the photovoltaic module series optimization system determines the photovoltaic string connection mode set corresponding to the target area. It is understandable that the photovoltaic modules in a photovoltaic string are adjacent to each other. This means that the photovoltaic modules in the photovoltaic string are arranged in a certain order. The second photovoltaic module needs to be adjacent to the first photovoltaic module, the third photovoltaic module needs to be adjacent to the second photovoltaic module, the fourth photovoltaic module needs to be adjacent to the third photovoltaic module, and so on.
[0110] Furthermore, the step of determining the set of photovoltaic string connection methods corresponding to the target area based on the adjusted set of photovoltaic string combinations includes:
[0111] Step b31: Obtain each photovoltaic string combination in the adjusted photovoltaic string combination set, and obtain the number and arrangement order of the photovoltaic modules contained in each photovoltaic string in each photovoltaic string combination;
[0112] Step b32: Determine the set of photovoltaic string connection methods corresponding to the target area based on the numbering and arrangement order of the photovoltaic modules contained in each photovoltaic string.
[0113] In steps b31 to b32, the photovoltaic module series optimization system sequentially obtains a photovoltaic string combination from the adjusted photovoltaic string combination set, and obtains the number and arrangement order of the photovoltaic modules in each photovoltaic string contained in the photovoltaic string combination. The photovoltaic modules in each photovoltaic string are connected in series according to the number and arrangement order to obtain the photovoltaic string connection method corresponding to the photovoltaic string combination. After the photovoltaic module series optimization system has processed all photovoltaic string combinations in the adjusted photovoltaic string combination set in the above manner, it obtains the photovoltaic string connection method set corresponding to the target area.
[0114] Step S20: Determine the target current characteristic correlation of each photovoltaic string connection method in the set of photovoltaic string connection methods;
[0115] In this embodiment, the photovoltaic module series optimization system acquires historical environmental information corresponding to the target area, calculates the current output characteristic curve of each photovoltaic module within the target area based on the historical environmental information, determines the current characteristic correlation of all possible photovoltaic strings based on the current output characteristic curve of each photovoltaic module, and then determines the target current characteristic correlation of each photovoltaic string connection method in the set of possible photovoltaic string connection methods based on the current characteristic correlation of all possible photovoltaic strings. It should be noted that the larger the target current characteristic correlation, the smaller the series mismatch loss between photovoltaic modules caused by the corresponding photovoltaic string connection method when it is shaded.
[0116] Specifically, step S20 includes:
[0117] Step c: Obtain historical environmental information of the target area, and sequentially select a set of photovoltaic string connection methods from the set of photovoltaic string connection methods;
[0118] Step d: Determine the current characteristic correlation of each photovoltaic string in the selected photovoltaic string connection method based on the historical environmental information;
[0119] Step e: Calculate the sum value based on the current characteristic correlation of each photovoltaic string, and determine the target current characteristic correlation of the selected photovoltaic string connection method based on the sum value.
[0120] In steps c to d, the photovoltaic module series optimization system acquires historical environmental information of the target area and sequentially selects a set of photovoltaic string connection methods from the set of photovoltaic string connection methods. Based on the historical environmental information of the target area, it calculates the current output characteristic curve corresponding to each photovoltaic module in the target area. Then, based on the current output characteristic curve corresponding to each photovoltaic module in the target area, it determines the current characteristic correlation of each photovoltaic string in the photovoltaic string connection method. The current characteristic correlations of each photovoltaic string in the photovoltaic string connection method are added together to obtain a sum, which is the target current characteristic correlation of the photovoltaic string connection method. After the photovoltaic module series optimization system processes each photovoltaic string connection method in the set of photovoltaic string connection methods in the above manner, it obtains the target current characteristic correlation corresponding to each photovoltaic string connection method in the set of photovoltaic string connection methods. In one example, the target area includes 40 photovoltaic modules, and the photovoltaic modules in the target area are arranged in a 5x8 matrix. It can be determined that each photovoltaic string connection method in the set of photovoltaic string connection methods includes 5 photovoltaic strings. The photovoltaic module series optimization system calculates the current characteristic correlation corresponding to the 5 photovoltaic strings respectively. By calculating the sum of the current characteristic correlations corresponding to the 5 photovoltaic strings, the target current characteristic correlation of the corresponding photovoltaic string connection method can be obtained.
[0121] Further, step d includes:
[0122] Step d1: Calculate the current output characteristic curve of each photovoltaic module in the target area based on the historical environmental information;
[0123] In this step, the photovoltaic module series optimization system simulates each photovoltaic module in the target area based on the historical environmental information obtained, including shading and meteorological data, and calculates the hourly current output characteristic curve of each photovoltaic module within a year.
[0124] Step d2: Based on the current output characteristic curve, calculate the correlation of current characteristics between every two adjacent photovoltaic modules in each photovoltaic string.
[0125] In this step, the photovoltaic module series optimization system calculates the current characteristic correlation between every two adjacent photovoltaic modules in each photovoltaic string based on the current output characteristic curve of each photovoltaic module. For example, if a photovoltaic string contains 8 photovoltaic modules arranged in the order of 1, 2, 3, 4, 5, 6, 7, 8, then photovoltaic module number 1 and photovoltaic module number 2 are adjacent to each other, photovoltaic module number 2 and photovoltaic module number 3 are adjacent to each other, and so on. The photovoltaic module series optimization system calculates the current characteristic correlation between photovoltaic modules numbered 1 and 2 based on their current output characteristic curves, and calculates the current characteristic correlation between photovoltaic modules numbered 2 and 3 based on their current output characteristic curves, and so on. This allows the system to obtain the current characteristic correlation between every two adjacent photovoltaic modules in the photovoltaic string.
[0126] Specifically, the correl function is used to calculate the correlation of current characteristics between two adjacent photovoltaic modules, as follows:
[0127]
[0128] Where X refers to the current output characteristic curve of one photovoltaic module, Y refers to the current output characteristic curve of another photovoltaic module, x refers to the value in the X current output characteristic curve, and y refers to the value in the Y current output characteristic curve. It refers to the average of all values in the X current output characteristic curve. It refers to the average of all values in the Y current output characteristic curve.
[0129] Step d3: Multiply the current characteristic correlation between every two adjacent photovoltaic modules in each photovoltaic string to obtain a product, and determine the current characteristic correlation of each photovoltaic string in the selected photovoltaic string connection method based on the product.
[0130] In this step, the photovoltaic module series optimization system multiplies the current characteristic correlations between every two adjacent photovoltaic modules in each photovoltaic string of the selected photovoltaic string connection method to obtain a product. This product is the current characteristic correlation of each photovoltaic string in the selected photovoltaic string connection method. For example, if a photovoltaic string includes 8 photovoltaic modules, then there are 7 current characteristic correlations between every pair of adjacent photovoltaic modules in this photovoltaic string. Multiplying the 7 current characteristic correlations together gives the current characteristic correlation of the photovoltaic string.
[0131] Step S30: Based on the target current characteristic correlation, determine the target photovoltaic string connection method from the set of photovoltaic string connection methods;
[0132] Specifically, step S30 includes:
[0133] Step f: Compare the target current characteristic correlation of each photovoltaic string connection method in the set of photovoltaic string connection methods, and determine the maximum target current characteristic correlation.
[0134] Step g: Select the photovoltaic string connection method with the largest target current characteristic correlation from the set of photovoltaic string connection methods as the target photovoltaic string connection method.
[0135] In this embodiment, after determining the target current characteristic correlation of each photovoltaic string connection method in the set of photovoltaic string connection methods, the photovoltaic module series optimization system compares the target current characteristic correlation of each set of photovoltaic string connection methods, determines the maximum target current characteristic correlation, and selects the photovoltaic string connection method corresponding to the maximum target current characteristic correlation from the set of photovoltaic string connection methods as the target photovoltaic string connection method. The larger the target current characteristic correlation, the smaller the series mismatch loss between photovoltaic modules caused by shading. Therefore, the photovoltaic string connection method corresponding to the maximum target current characteristic correlation is selected as the target photovoltaic string connection method to reduce the series mismatch loss between photovoltaic modules caused by shading.
[0136] Step S40: Based on the target photovoltaic array stringing method, control the photovoltaic modules in the target area to be connected in series.
[0137] Specifically, step S40 includes:
[0138] Step h: Obtain each target photovoltaic string in the target photovoltaic string stringing method, and obtain the number and arrangement order of the photovoltaic modules in each target photovoltaic string;
[0139] Step i: Based on the number of the photovoltaic module in each target photovoltaic string, determine the corresponding photovoltaic module in the target area, and control the corresponding photovoltaic modules in the target area to be connected in series according to the arrangement order of the photovoltaic modules in each target photovoltaic string.
[0140] In this embodiment, the photovoltaic module series optimization system obtains each target photovoltaic string in the target photovoltaic string stringing method and obtains the number of the photovoltaic module in each target photovoltaic string. Based on the number of the photovoltaic module corresponding to each target photovoltaic string in the target area, and according to the arrangement order of the photovoltaic modules in each target photovoltaic string, the system sequentially controls the corresponding photovoltaic modules in the target area to be connected in series. In one example, such as Figure 2 As shown, Figure 2 This is a schematic diagram of photovoltaic modules connected in series in the target area. The target area includes photovoltaic modules numbered 1 to 40. R1 is the first photovoltaic string in the target photovoltaic string connection method, which is composed of 8 photovoltaic modules numbered 1, 2, 3, 4, 5, 6, 7, and 15 connected in series. R2 is the second photovoltaic string in the target photovoltaic string connection method, which is composed of 8 photovoltaic modules numbered 8, 16, 24, 32, 40, 39, 31, and 23 connected in series, and so on.
[0141] The photovoltaic module series optimization system in this embodiment determines a target area, which is typically the area where photovoltaic modules are installed in a photovoltaic power station. It calculates all possible series connection methods for all photovoltaic modules within the target area, obtaining a set of photovoltaic string connection methods. The system calculates the current output characteristic curve for each photovoltaic module within the target area. Based on the current output characteristic curve for each photovoltaic module, it determines the current characteristic correlation of all possible photovoltaic strings. Then, based on the current characteristic correlation of all possible photovoltaic strings, it determines the target current characteristic correlation for each photovoltaic string connection method in the set of photovoltaic string connection methods. The system compares the target current characteristic correlations of each photovoltaic string connection method, determines the target photovoltaic string connection method in the set of photovoltaic string connection methods, and controls the photovoltaic modules in the target area to be connected in series based on the target photovoltaic string connection method. This invention calculates the current output characteristic curve of each photovoltaic module in the target area using historical environmental information. Based on the current output characteristic curve of each photovoltaic module, it determines the current characteristic correlation of all possible photovoltaic strings. Then, based on the current characteristic correlation of all possible photovoltaic strings, it determines the target current characteristic correlation of each photovoltaic string connection method in the set of photovoltaic string connection methods. Based on the target current characteristic correlation, it determines the target photovoltaic string connection method, and then determines the photovoltaic string connection method with the closest current characteristics between photovoltaic modules, thereby reducing the series mismatch loss between photovoltaic modules caused by shading.
[0142] Further, refer to Figure 3The second embodiment of the present invention is proposed. The difference between the second embodiment and the first embodiment is that, in step b3 above, the step of adjusting the photovoltaic string combination set according to the number of the photovoltaic modules, the number of photovoltaic modules in the photovoltaic string, and the arrangement order includes:
[0143] Step b31: Based on the number of the photovoltaic module, the number of photovoltaic modules in the photovoltaic string, and the arrangement order, determine whether there are photovoltaic strings with non-adjacent photovoltaic modules in each photovoltaic string combination set;
[0144] In this step, the photovoltaic module series optimization system sequentially selects a set of photovoltaic string combinations from the set of photovoltaic string combinations, and obtains the number and arrangement order of the photovoltaic modules in each photovoltaic string contained in the selected photovoltaic string combination. Based on the number and arrangement order of the photovoltaic modules in each photovoltaic string, the system sequentially checks whether there are non-adjacent photovoltaic modules in each photovoltaic string. If so, the photovoltaic module series optimization system determines that there are photovoltaic strings with non-adjacent photovoltaic modules in the selected photovoltaic string combination.
[0145] It should be noted that, based on the numbering and arrangement order of the photovoltaic modules in each photovoltaic string, the process of checking whether there are non-adjacent photovoltaic modules in each photovoltaic string is as follows: According to the arrangement order, obtain the number of the photovoltaic module in the first position and the number of the photovoltaic module in the second position in the photovoltaic string, and determine whether they are adjacent based on their numbers; obtain the number of the photovoltaic module in the second position and the number of the photovoltaic module in the third position in the photovoltaic string, and determine whether they are adjacent based on their numbers; obtain the number of the photovoltaic module in the third position and the number of the photovoltaic module in the fourth position in the photovoltaic string, and determine whether they are adjacent based on their numbers, and so on.
[0146] Specifically, step b31 includes:
[0147] Step b311: Select a set of photovoltaic string combinations from the set of photovoltaic string combinations in sequence;
[0148] Step b312: Obtain the arrangement order of photovoltaic modules in the selected photovoltaic string combination, and calculate the difference between the numbers of every two photovoltaic modules in the photovoltaic string based on the arrangement order;
[0149] In steps b311 to b312, the photovoltaic module series optimization system sequentially selects a set of photovoltaic string combinations from the photovoltaic string combination set, obtains all photovoltaic strings in the selected photovoltaic string combination, determines the arrangement order of photovoltaic modules in each photovoltaic string, and, according to the arrangement order, sequentially obtains the corresponding numbers of two interconnected photovoltaic modules in each photovoltaic string, and then calculates the difference between the corresponding numbers of the two interconnected photovoltaic modules. For example, the photovoltaic module series optimization system, according to the arrangement order, obtains the first number of the photovoltaic module in the first position and the second number of the photovoltaic module in the second position in the photovoltaic string, and calculates the difference between the first and second numbers; obtains the second number of the photovoltaic module in the second position and the third number of the photovoltaic module in the third position in the photovoltaic string, and calculates the difference between the second and third numbers; obtains the third number of the photovoltaic module in the third position and the fourth number of the photovoltaic module in the fourth position in the photovoltaic string, and calculates the difference between the third and fourth numbers, and so on.
[0150] Step b313: If the difference is equal to the number of photovoltaic modules in the photovoltaic string or equal to a preset threshold, then it is determined that there is no photovoltaic string with non-adjacent photovoltaic modules in the selected photovoltaic string combination.
[0151] Step b314: If there is a difference that is not equal to the number of photovoltaic modules in the photovoltaic string and is not equal to the preset threshold, then it is determined that there is a photovoltaic string in the selected photovoltaic string combination where the photovoltaic modules are not adjacent.
[0152] In steps b313 to b314, after calculating the difference between the corresponding numbers of two interconnected photovoltaic modules in each photovoltaic string, the photovoltaic module series optimization system compares the difference with the number of photovoltaic modules in the photovoltaic string and a preset threshold. If the difference is equal to the number of photovoltaic modules in the photovoltaic string or equal to the preset threshold, it is determined that there are no photovoltaic strings with non-adjacent photovoltaic modules in the selected photovoltaic string combination. If there is a difference that is neither equal to the number of photovoltaic modules in the photovoltaic string nor equal to the preset threshold, the two photovoltaic modules corresponding to this difference are not adjacent, thus determining that there are photovoltaic strings with non-adjacent photovoltaic modules in the selected photovoltaic string combination. It should be noted that, as Figure 4 As shown, Figure 4 This diagram illustrates adjacent photovoltaic (PV) modules in the target area. In the diagram, i, im, i-1, i+1, and i+m are the PV module numbers, where m is the column number of the PV modules in the target area. It can be seen that the PV module numbered i can only be adjacent to PV modules numbered im, i-1, i+1, or i+m. That is, for two connected PV modules to be considered adjacent, the difference between their numbers must be equal to or equal to the column number of the PV modules in the target area.
[0153] Step b32: If they exist, then based on the number of the photovoltaic module connected to the non-adjacent photovoltaic module in the photovoltaic string, determine the adjacent photovoltaic module in the corresponding photovoltaic string combination, and adjust the non-adjacent photovoltaic module to the adjacent photovoltaic module.
[0154] In this step, if the photovoltaic module series optimization system determines that there are photovoltaic strings in the selected photovoltaic string combination where the photovoltaic modules are not adjacent, it determines the adjacent photovoltaic modules in the corresponding photovoltaic string combination based on the numbers of the photovoltaic modules connected to the non-adjacent photovoltaic modules in the non-adjacent photovoltaic strings, and adjusts the non-adjacent photovoltaic modules to be adjacent photovoltaic modules; for example: Figure 5 As shown, Figure 5 To adjust the schematic diagram of non-adjacent photovoltaic modules in a photovoltaic string, the photovoltaic strings with non-adjacent photovoltaic modules in the diagram are: 14, 13, 12, 11, 10, 9, 17, 33. Among them, 33 is the non-adjacent photovoltaic module in this photovoltaic string, and 17 is the photovoltaic module connected to the non-adjacent photovoltaic module 33. It is determined that the photovoltaic module adjacent to 17 is 18 or 25. The photovoltaic module series optimization system can see that the non-adjacent photovoltaic module 33 in the photovoltaic string is adjusted and replaced with the adjacent photovoltaic module 18 or 25.
[0155] The photovoltaic module series optimization system in this embodiment determines whether there are photovoltaic strings with non-adjacent photovoltaic modules in each photovoltaic string combination set based on the photovoltaic module number, arrangement order, and number of photovoltaic modules in the photovoltaic string. If so, it selects the corresponding adjacent photovoltaic module in the photovoltaic string combination to replace the non-adjacent photovoltaic module. This ensures that no jumpers occur during the automatic series connection of photovoltaic modules, thereby helping to reduce the series mismatch loss between photovoltaic modules in the target area caused by shading.
[0156] like Figure 6 As shown, the present invention also provides a photovoltaic module series optimization device. The photovoltaic module series optimization device of the present invention includes:
[0157] The calculation module 101 is used to determine the target area and calculate the set of photovoltaic string connection methods corresponding to the target area;
[0158] The first determining module 102 is used to determine the target current characteristic correlation of each photovoltaic string connection method in the photovoltaic string connection method set.
[0159] The second determining module 103 is used to determine the target photovoltaic string connection method in the set of photovoltaic string connection methods based on the target current characteristic correlation.
[0160] The control module 104 is used to control the photovoltaic modules in the target area to be connected in series based on the target photovoltaic group string connection method.
[0161] Furthermore, the computing module is also used for:
[0162] According to the preset numbering rules, each photovoltaic module in the target area is numbered, and the total number of photovoltaic modules in the target area and the number of photovoltaic modules in the photovoltaic string are obtained.
[0163] Based on the total number of photovoltaic modules, the number of photovoltaic modules in a photovoltaic string, and the serial number of the photovoltaic modules, determine the set of photovoltaic string connection methods corresponding to the target area.
[0164] Furthermore, the computing module is also used for:
[0165] Based on the total number of photovoltaic modules and the number of photovoltaic modules in the photovoltaic string, the photovoltaic modules in the target area are randomly grouped to obtain a set of photovoltaic string combinations;
[0166] Obtain the order of photovoltaic modules in each photovoltaic string in the photovoltaic string combination set;
[0167] Based on the photovoltaic module number, the number of photovoltaic modules in the photovoltaic string, and the arrangement order, the photovoltaic string combination set is adjusted, and based on the adjusted photovoltaic string combination set, the photovoltaic string connection method set corresponding to the target area is determined.
[0168] Furthermore, the computing module is also used for:
[0169] Based on the number of the photovoltaic module, the number of photovoltaic modules in the photovoltaic string, and the arrangement order, determine whether there is a photovoltaic string with non-adjacent photovoltaic modules in each photovoltaic string combination in the photovoltaic string combination set;
[0170] If they exist, then based on the number of the photovoltaic module connected to the non-adjacent photovoltaic module in the photovoltaic string, the adjacent photovoltaic module is determined in the corresponding photovoltaic string combination, and the non-adjacent photovoltaic module is adjusted to become the adjacent photovoltaic module.
[0171] Furthermore, the computing module is also used for:
[0172] Select one photovoltaic string combination from the set of photovoltaic string combinations in sequence;
[0173] Obtain the arrangement order of photovoltaic modules in the selected photovoltaic string combination, and calculate the difference between the numbers of every two photovoltaic modules in the photovoltaic string;
[0174] If the difference is equal to the number of photovoltaic modules in the photovoltaic string or equal to a preset threshold, then it is determined that there is no photovoltaic string in the selected photovoltaic string combination where the photovoltaic modules are not adjacent.
[0175] If there exists a difference that is neither equal to the number of photovoltaic modules in the photovoltaic string nor equal to the preset threshold, then it is determined that there is a photovoltaic string in the selected photovoltaic string combination where the photovoltaic modules are not adjacent.
[0176] Furthermore, the computing module is also used for:
[0177] Get each photovoltaic string combination in the adjusted photovoltaic string combination set, and get the number and arrangement order of the photovoltaic modules contained in each photovoltaic string in each photovoltaic string combination;
[0178] Based on the numbering and arrangement order of the photovoltaic modules contained in each photovoltaic string, determine the set of photovoltaic string connection methods corresponding to the target area.
[0179] Furthermore, the first determining module is also used for:
[0180] Obtain historical environmental information of the target area, and sequentially select a set of photovoltaic string connection methods from the set of photovoltaic string connection methods;
[0181] The correlation of current characteristics of each photovoltaic string in the selected photovoltaic string stringing method is determined based on the historical environmental information.
[0182] The sum is calculated based on the current characteristic correlation of each photovoltaic string, and the target current characteristic correlation of the selected photovoltaic string connection method is determined based on the sum.
[0183] Furthermore, the first determining module is also used for:
[0184] Based on the historical environmental information, the current output characteristic curve of each photovoltaic module in the target area is calculated;
[0185] Based on the current output characteristic curve, the correlation of current characteristics between every two adjacent photovoltaic modules in each photovoltaic string is calculated.
[0186] The current characteristic correlation between every two adjacent photovoltaic modules in each photovoltaic string is multiplied to obtain a product, and the current characteristic correlation of each photovoltaic string in the selected photovoltaic string connection method is determined based on the product.
[0187] Furthermore, the second determining module is also used for:
[0188] The correlation of the target current characteristics of each photovoltaic string connection method in the set of photovoltaic string connection methods is compared to determine the maximum correlation of the target current characteristics.
[0189] The photovoltaic string connection method with the largest target current characteristic correlation is selected from the set of photovoltaic string connection methods as the target photovoltaic string connection method.
[0190] Furthermore, the control module is also used for:
[0191] Obtain each target photovoltaic string in the target photovoltaic string stringing method, and obtain the number and arrangement order of the photovoltaic modules in each target photovoltaic string;
[0192] Based on the number of the photovoltaic module in each target photovoltaic string, the corresponding photovoltaic module in the target area is determined, and the photovoltaic modules in the target area are connected in series according to the arrangement order of the photovoltaic modules in each target photovoltaic string.
[0193] The present invention also provides a photovoltaic module series optimization system.
[0194] The photovoltaic module series optimization system includes: a memory, a processor, and a photovoltaic module series optimization program stored in the memory and executable on the processor. When the photovoltaic module series optimization program is executed by the processor, it implements the steps of the photovoltaic module series optimization method as described above.
[0195] The method implemented when the photovoltaic module series optimization program running on the processor is executed can be referred to in various embodiments of the photovoltaic module series optimization method of the present invention, and will not be repeated here.
[0196] It should be noted that, in this document, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or system that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or system. Unless otherwise specified, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or system that includes that element.
[0197] The sequence numbers of the above embodiments of the present invention are for descriptive purposes only and do not represent the superiority or inferiority of the embodiments.
[0198] Through the above description of the embodiments, those skilled in the art can clearly understand that the methods of the above embodiments can be implemented by means of software plus necessary general-purpose hardware platforms. Of course, they can also be implemented by hardware, but in many cases the former is a better implementation method. Based on this understanding, the technical solution of the present invention, in essence, or the part that contributes to the prior art, can be embodied in the form of a software product. This computer software product is stored in a storage medium (such as ROM / RAM, magnetic disk, optical disk) as described above, and includes several instructions to cause a terminal device (which may be a mobile phone, computer, server, or network device, etc.) to execute the methods described in the various embodiments of the present invention.
[0199] The above are merely preferred embodiments of the present invention and do not limit the patent scope of the present invention. Any equivalent structural or procedural transformations made based on the content of the present invention's specification and drawings, or direct or indirect applications in other related technical fields, are similarly included within the patent protection scope of the present invention.
Claims
1. A method for optimizing the series connection of photovoltaic modules, characterized in that, The photovoltaic module series optimization method includes the following steps: Determine the target area and calculate the set of photovoltaic string connection methods corresponding to the target area; Determine the target current characteristic correlation of each photovoltaic string connection method in the set of photovoltaic string connection methods; Based on the target current characteristic correlation, a target photovoltaic string connection method is determined from the set of photovoltaic string connection methods, wherein the target photovoltaic string connection method is the photovoltaic string connection method corresponding to the largest target current characteristic correlation. Based on the target photovoltaic array stringing method, control the photovoltaic modules in the target area to be connected in series; The step of calculating the set of photovoltaic string connection methods corresponding to the target area includes: According to the preset numbering rules, each photovoltaic module in the target area is numbered, and the total number of photovoltaic modules in the target area and the number of photovoltaic modules in the photovoltaic string are obtained. Based on the total number of photovoltaic modules and the number of photovoltaic modules in the photovoltaic string, the photovoltaic modules in the target area are randomly grouped to obtain a set of photovoltaic string combinations; Obtain the order of photovoltaic modules in each photovoltaic string in the photovoltaic string combination set; Based on the photovoltaic module number, the number of photovoltaic modules in the photovoltaic string, and the arrangement order, the photovoltaic string combination set is adjusted, and based on the adjusted photovoltaic string combination set, the photovoltaic string connection method set corresponding to the target area is determined, wherein there are no photovoltaic strings with non-adjacent photovoltaic modules in each photovoltaic string combination in the adjusted photovoltaic string combination set.
2. The photovoltaic module series optimization method as described in claim 1, characterized in that, The step of adjusting the photovoltaic string combination set according to the photovoltaic module number, the number of photovoltaic modules in the photovoltaic string, and the arrangement order includes: Based on the number of the photovoltaic module, the number of photovoltaic modules in the photovoltaic string, and the arrangement order, determine whether there is a photovoltaic string with non-adjacent photovoltaic modules in each photovoltaic string combination in the photovoltaic string combination set; If they exist, then based on the number of the photovoltaic module connected to the non-adjacent photovoltaic module in the photovoltaic string, the adjacent photovoltaic module is determined in the corresponding photovoltaic string combination, and the non-adjacent photovoltaic module is adjusted to become the adjacent photovoltaic module.
3. The photovoltaic module series optimization method as described in claim 2, characterized in that, The step of determining whether there are photovoltaic strings with non-adjacent photovoltaic modules in each photovoltaic string combination set based on the photovoltaic module number, the number of photovoltaic modules in the photovoltaic string, and the arrangement order includes: Select one photovoltaic string combination from the set of photovoltaic string combinations in sequence; Obtain the arrangement order of the photovoltaic modules in the selected photovoltaic string combination, and calculate the difference between the numbers of every two photovoltaic modules in the photovoltaic string based on the arrangement order; If the difference is equal to the number of photovoltaic modules in the photovoltaic string or equal to a preset threshold, then it is determined that there is no photovoltaic string in the selected photovoltaic string combination where the photovoltaic modules are not adjacent. If there exists a difference that is neither equal to the number of photovoltaic modules in the photovoltaic string nor equal to the preset threshold, then it is determined that there is a photovoltaic string in the selected photovoltaic string combination where the photovoltaic modules are not adjacent.
4. The photovoltaic module series optimization method as described in claim 1, characterized in that, The step of determining the set of photovoltaic string connection methods corresponding to the target area based on the adjusted set of photovoltaic string combinations includes: Get each photovoltaic string combination in the adjusted photovoltaic string combination set, and get the number and arrangement order of the photovoltaic modules contained in each photovoltaic string in each photovoltaic string combination; Based on the numbering and arrangement order of the photovoltaic modules contained in each photovoltaic string, determine the set of photovoltaic string connection methods corresponding to the target area.
5. The photovoltaic module series optimization method as described in claim 1, characterized in that, The step of determining the target current characteristic correlation of each photovoltaic string connection method in the photovoltaic string connection method set includes: Obtain historical environmental information of the target area, and sequentially select a set of photovoltaic string connection methods from the set of photovoltaic string connection methods; The correlation of current characteristics of each photovoltaic string in the selected photovoltaic string stringing method is determined based on the historical environmental information. The sum is calculated based on the current characteristic correlation of each photovoltaic string, and the target current characteristic correlation of the selected photovoltaic string connection method is determined based on the sum.
6. The photovoltaic module series optimization method as described in claim 5, characterized in that, The step of determining the current characteristic correlation of each photovoltaic string in the selected photovoltaic string connection method based on the historical environmental information includes: Based on the historical environmental information, the current output characteristic curve of each photovoltaic module in the target area is calculated; Based on the current output characteristic curve, the correlation of current characteristics between every two adjacent photovoltaic modules in each photovoltaic string is calculated. The current characteristic correlation between every two adjacent photovoltaic modules in each photovoltaic string is multiplied to obtain a product, and the current characteristic correlation of each photovoltaic string in the selected photovoltaic string connection method is determined based on the product.
7. The photovoltaic module series optimization method as described in claim 1, characterized in that, The step of determining the target photovoltaic string connection method from the set of photovoltaic string connection methods based on the target current characteristic correlation includes: The correlation of the target current characteristics of each photovoltaic string connection method in the set of photovoltaic string connection methods is compared to determine the maximum correlation of the target current characteristics. The photovoltaic string connection method with the largest target current characteristic correlation is selected from the set of photovoltaic string connection methods as the target photovoltaic string connection method.
8. The photovoltaic module series optimization method as described in claim 1, characterized in that, The step of controlling the photovoltaic modules in the target area to be connected in series based on the target photovoltaic group string connection method includes: Obtain each target photovoltaic string in the target photovoltaic string stringing method, and obtain the number and arrangement order of the photovoltaic modules in each target photovoltaic string; Based on the number of the photovoltaic module in each target photovoltaic string, the corresponding photovoltaic module in the target area is determined, and the photovoltaic modules in the target area are connected in series according to the arrangement order of the photovoltaic modules in each target photovoltaic string.
9. A photovoltaic module series optimization device, characterized in that, The photovoltaic module series optimization device includes: The calculation module is used to determine the target area and calculate the set of photovoltaic string connection methods corresponding to the target area; The first determining module is used to determine the target current characteristic correlation of each photovoltaic string connection method in the photovoltaic string connection method set. The second determining module is used to determine the target photovoltaic string connection method in the set of photovoltaic string connection methods based on the target current characteristic correlation, wherein the target photovoltaic string connection method is the photovoltaic string connection method corresponding to the largest target current characteristic correlation. The control module is used to control the photovoltaic modules in the target area to be connected in series based on the target photovoltaic group string connection method; The computing module is also used for: According to the preset numbering rules, each photovoltaic module in the target area is numbered, and the total number of photovoltaic modules in the target area and the number of photovoltaic modules in the photovoltaic string are obtained. Based on the total number of photovoltaic modules and the number of photovoltaic modules in the photovoltaic string, the photovoltaic modules in the target area are randomly grouped to obtain a set of photovoltaic string combinations; Obtain the order of photovoltaic modules in each photovoltaic string in the photovoltaic string combination set; Based on the photovoltaic module number, the number of photovoltaic modules in the photovoltaic string, and the arrangement order, the photovoltaic string combination set is adjusted, and based on the adjusted photovoltaic string combination set, the photovoltaic string connection method set corresponding to the target area is determined, wherein there are no photovoltaic strings with non-adjacent photovoltaic modules in each photovoltaic string combination in the adjusted photovoltaic string combination set.
10. A photovoltaic module series optimization system, characterized in that, The photovoltaic module series optimization system includes: a memory, a processor, and a photovoltaic module series optimization program stored in the memory and executable on the processor. When the photovoltaic module series optimization program is executed by the processor, it implements the steps of the photovoltaic module series optimization method as described in any one of claims 1 to 8.