Automatic Division Method for the Convergence Area of Large-Scale Photovoltaic Power Plants Based on Computers

Abstract

The present invention discloses a computer-based method for automatically dividing the convergence area of a large photovoltaic field, comprising the following steps: 1. obtaining a string configuration table and a plan view of the photovoltaic field; 2. determining whether the number of strings is ≥2; if so, using the string configuration table as a level 0 string configuration table and the outline of the plan view as a level 0 outer contour; 3. dividing the n-1 level string configuration table into two n-level string configuration tables; 4. dividing the n-1 level outer contour into two n-level outer contours; 5. respectively configuring the strings in the two n-level string configuration tables into the two n-level outer contours, and rounding them up respectively; 6. repeating steps 3 to 5 until the number of strings in the n-level string configuration table is 1; 7. traversing the string configuration table to create a convergence area of the photovoltaic field. The application of the present invention makes the convergence area division faster, greatly reduces the manual error rate, and greatly reduces the time spent on modification.

Description

Technical Field

[0001] The present invention relates to the technical field of computer-aided design, and in particular to a computer-based automatic division method for a large photovoltaic field confluence area. Background Art

[0002] Existing photovoltaic fields usually have many photovoltaic strings installed. The string configuration is configured according to the electrical parameters of the equipment, that is, several strings are connected to a primary busbar device, and several primary busbar devices are connected to a power generation unit.

[0003] In actual overshoot design, the number of strings connected to the primary converging device and the number of strings connected to the power generation unit must be calculated based on the configuration. Typically, the power generation unit division is performed first, followed by the primary converging area division.

[0004] However, the existing design method is to manually divide the bus area using multiple coil segments within computer CAD software. This is essentially repetitive work, very inefficient, and time-consuming and labor-intensive to modify in the event of an error. Moreover, as the capacity of the photovoltaic field increases, the division of the bus area becomes increasingly time-consuming, and human errors also increase.

[0005] Therefore, how to improve design efficiency and eliminate manual operation errors has become a technical problem that technical personnel in this field urgently need to solve. Summary of the Invention

[0006] In view of the above-mentioned defects of the prior art, the present invention provides a computer-based method for automatically dividing the convergence area of a large photovoltaic field. The purpose of this method is to automatically complete the division of the convergence area of a large photovoltaic field through a computer program to improve design efficiency and eliminate errors in manual operation.

[0007] To achieve the above objectives, the present invention discloses a computer-based method for automatically dividing the confluence area of a large photovoltaic field, comprising the following steps:

[0008] Step 1: Obtain a string configuration table of a photovoltaic field that needs to be divided into confluence areas, and a plan of a site for setting all strings in the string configuration table;

[0009] Step 2: determine whether the number of confluence units that can be formed by the string is greater than or equal to 2;

[0010] If not, go to step 7;

[0011] If yes, then take the string configuration table as the level 0 string configuration table and the outline of the plan as the level 0 outer contour to execute step 3;

[0012] Step 3: Split the n-1 level string configuration table into two n-level string configuration tables according to the number of strings contained therein, where n is a natural number greater than 1;

[0013] Step 4: Determine a level n-1 segmentation line of the level n-1 outer contour, and segment the level n-1 outer contour into two level n outer contours; the level n-1 segmentation line passes through the centroid of the corresponding level n-1 outer contour;

[0014] Step 5: respectively arrange the strings in the two n-level string configuration tables into the two n-level outer contours, and round up the strings so that the strings in each n-level string configuration table are integers;

[0015] Step 6, repeating steps 3 to 5 until the number of strings in the string configuration table at level n can only form one confluence unit;

[0016] Step 7: traverse the string configuration table, and create a confluence area of the photovoltaic field according to the position of the multiple levels of the outer contours assigned to each string.

[0017] Preferably, in step 4, if the length of the outer contour in the north-south direction is greater than the length in the east-west direction, the corresponding dividing line divides the outer contour along the east-west direction;

[0018] If the length of the outer contour in the east-west direction is greater than the length in the north-south direction, the corresponding dividing line divides the outer contour along the north-south direction.

[0019] Preferably, the rounding in step 5 refers to respectively allocating the scattered strings that appear when the n-1 level string configuration table is divided into two n level string configuration tables in step 3 to the nearest n level outer contour and the corresponding n level string configuration table.

[0020] Beneficial effects of the present invention:

[0021] The application of the present invention makes the division of the confluence area faster, greatly reduces the manual error rate, and greatly reduces the time spent on modification. On a 100MW project, more than 70% of the time can be saved.

[0022] The concept, specific structure and technical effects of the present invention will be further described below in conjunction with the accompanying drawings to fully understand the purpose, characteristics and effects of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 A flow chart showing an embodiment of the present invention is shown.

[0024] Figure 2 FIG. 1 is a schematic diagram showing the photovoltaic field sink area after division in one embodiment of the present invention. DETAILED DESCRIPTION

[0025] Example

[0026] like Figure 1 As shown in FIG, a computer-based automatic division method of the confluence area of a large photovoltaic field includes the following steps:

[0027] Step 1: Obtain a string configuration table of the photovoltaic field that needs to be divided into confluence areas, and a plan of the site for setting all the strings in the string configuration table;

[0028] Step 2: Determine whether the number of confluence units that can be formed by the string is greater than or equal to 2;

[0029] If not, go to step 7;

[0030] If yes, take the string configuration table as the level 0 string configuration table and the outline of the plan as the level 0 outer contour and execute step 3;

[0031] Step 3: Split the n-1 level string configuration table into two n-level string configuration tables according to the number of strings contained, where n is a natural number greater than 1;

[0032] Step 4: determine the n-1-level segmentation line of the n-1-level outer contour, and segment the n-1-level outer contour into two n-level outer contours; the n-1-level segmentation line passes through the centroid of the corresponding n-1-level outer contour;

[0033] Step 5: Arrange the strings in the two n-level string configuration tables into the two n-level outer contours respectively, and round them up so that the strings in each n-level string configuration table are integers;

[0034] Step 6: Repeat steps 3 to 5 until the number of strings in the n-level string configuration table can only form one confluence unit;

[0035] Step 7: traverse the string configuration table and create a PV field confluence area based on the location of the multi-level outer contours assigned to each string.

[0036] In some embodiments, in step 4, if the length of the outer contour in the north-south direction is greater than the length in the east-west direction, the corresponding dividing line divides the outer contour along the east-west direction;

[0037] If the east-west length of the outer contour is greater than the north-south length, the corresponding dividing line divides the outer contour along the north-south direction.

[0038] In some embodiments, the rounding in step 5 refers to respectively allocating the scattered strings that appear when the n-1-level string configuration table is divided into two n-level string configuration tables in step 3 to the nearest n-level outer contour and the corresponding n-level string configuration table.

[0039] like Figure 2 As shown, the string configuration table, ie, the level 0 string configuration table, includes 279 strings.

[0040] For the first division, the level 0 dividing line is east-west. The strings in the two level 1 string configuration tables are 23*5+24*1=139 and 23*4+24*2=138, respectively. This results in two level 1 string configuration tables with 139 and 140 strings and the corresponding level 1 outer contours.

[0041] Divide these two 1-level string configuration tables and the corresponding 1-level outer contours;

[0042] The first 1-level string configuration table and the corresponding 1-level outer contour are divided into two 2-level string configuration tables and corresponding 2-level outer contours of 23*3=69 and 23*2+24*1=70;

[0043] The second 1-level string configuration table and the corresponding 1-level outer contour are divided into two 2-level string configuration tables and corresponding 2-level outer contours of 23*2+24*1=70 and 23*2+24*1=70;

[0044] That is, after the division, a total of 4 2-level string configuration tables including 69, 70, 70 and 70 and the corresponding 2-level outer contours are obtained.

[0045] Similarly, the four two-level string configuration tables and the corresponding two-level outer contours are further divided to obtain eight three-level string configuration tables and the corresponding three-level outer contours, including 23, 46, 24, 46, 24, 46, 24, and 46;

[0046] Among them, the two 3-level string configuration tables including 23 and 24 and the corresponding 3-level outer contours are no longer divided;

[0047] The two 3-level string configuration tables including 46 and the corresponding 3-level outer contours are further divided into two 4-level string configuration tables 23 and 23 and the corresponding 4-level outer contours;

[0048] Finally, we get 12 confluence areas of 23 or 24 strings, including 23, 23, 23, 24, 23, 23, 24, 23, 23, 23 and 23.

[0049] The above describes in detail the preferred embodiments of the present invention. It should be understood that those skilled in the art can make numerous modifications and variations based on the concepts of the present invention without inventive effort. Therefore, any technical solutions that can be derived by those skilled in the art through logical analysis, reasoning, or limited experimentation based on the concepts of the present invention and the prior art should be within the scope of protection defined by the claims.

Claims

1. A computer-based method for automatically dividing the confluence area of a large photovoltaic field; characterized in that: The steps include: Step 1: Obtain a string configuration table of a photovoltaic field that needs to be divided into confluence areas, and a plan of a site for setting all strings in the string configuration table; Step 2: determine whether the number of confluence units that can be formed by the string is greater than or equal to 2; If not, go to step 7; If yes, then take the string configuration table as the level 0 string configuration table and the outline of the plan as the level 0 outer contour to execute step 3; Step 3: Split the n-1 level string configuration table into two n-level string configuration tables according to the number of strings contained therein, where n is a natural number greater than 1; Step 4: Determine a level n-1 segmentation line of the level n-1 outer contour, and segment the level n-1 outer contour into two level n outer contours; the level n-1 segmentation line passes through the centroid of the corresponding level n-1 outer contour; Step 5: respectively arrange the strings in the two n-level string configuration tables into the two n-level outer contours, and round up the strings so that the strings in each n-level string configuration table are integers; Step 6, repeating steps 3 to 5 until the number of strings in the string configuration table at level n can only form one confluence unit; Step 7: traverse the string configuration table, and create a confluence area of the photovoltaic field according to the position of the multiple levels of the outer contours assigned to each string.

2. The computer-based automatic division method of large photovoltaic field confluence area according to claim 1, characterized in that: In step 4, if the length of the outer contour in the north-south direction is greater than the length in the east-west direction, the corresponding dividing line divides the outer contour along the east-west direction; If the length of the outer contour in the east-west direction is greater than the length in the north-south direction, the corresponding dividing line divides the outer contour along the north-south direction.

3. The computer-based automatic division method of large photovoltaic field confluence area according to claim 1, characterized in that: The rounding in step 5 refers to respectively allocating the scattered strings that appear when the n-1 level string configuration table is divided into two n level string configuration tables in step 3 to the nearest n level outer contour and the corresponding n level string configuration table.

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