Photovoltaic module layout region extraction method based on web

Abstract

The present invention relates to a photovoltaic module layout region extraction method based on the web. The method comprises the following steps: (1) establishing a digital elevation model; (2) setting slope and aspect parameters; (3) performing slope and aspect analysis; (4) extracting pixel units that meet a condition; (5) calculating layout spacing values; (6) performing area screening; and (7) arranging photovoltaic modules. In the present invention, terrain analysis is performed by means of a web application system, an available region for photovoltaic module layout is visually presented in combination with a graphical visualization tool and a three-dimensional technique, a rendering technique is used to simulate changes in form of illumination over time, and terrain structure information is interpreted, such that the optimal sunlight region of a site is extracted, the maximum power generation benefit of the site is achieved, and rational photovoltaic module layout regions can be provided for various complex terrains.

Description

Web-based photovoltaic module arrangement area extraction method TECHNICAL FIELD

[0001] The present application belongs to the technical field of photovoltaic power generation, and particularly relates to a Web-based photovoltaic module arrangement area extraction method, which is a method for extracting a photovoltaic module arrangement visible area based on terrain analysis in a Web application system. BACKGROUND

[0002] In photovoltaic module arrangement design, the rationality of the photovoltaic module arrangement area has an important influence on the capacity, power generation efficiency and economic benefits of a photovoltaic power station, and the determination of the arrangement area needs to fully consider the terrain, illumination, shadow shielding and the like to ensure that the photovoltaic module can maximize the absorption of solar radiation. At present, the range of the arrangement area is determined mainly by terrain map extraction. For a flat plain with gentle terrain, the illumination conditions in the entire site are basically the same, and there is no difference between the sunny side and the shady side, and the photovoltaic power station can be constructed after local site flattening. However, for a mountainous area with complex terrain, the mountain will produce a "sunny side and shady side" and different slopes will have different shielding effects, and not all areas can ensure 6 hours of daily sunshine. It is difficult to analyze the illumination conditions of each area only by the terrain map, and the photovoltaic arrangement area cannot be accurately determined, which brings great difficulty to photovoltaic arrangement. SUMMARY

[0003] In view of the above problems, the present application provides a Web-based photovoltaic module arrangement area extraction method.

[0004] The specific technical solution is as follows: a Web-based photovoltaic module arrangement area extraction method, comprising the following steps:

[0005] (1) Establishing a digital elevation model: collecting site contour data to generate a DEM elevation model;

[0006] (2) Setting slope and slope direction parameters: setting different parameters for different regions according to the site and photovoltaic module specifications, and the parameters include slope threshold, illumination angle, arrangement mode and equipment module specifications;

[0007] (3) Slope and slope direction analysis: performing slope and slope direction analysis according to site terrain data and performing hierarchical display;

[0008] (4) Calculating pixel units meeting the conditions: on the basis of the slope and slope direction analysis, screening pixel units meeting the parameter conditions according to the set slope and slope direction parameters, and generating all the vector surfaces meeting the conditions by using the grid-to-vector range function;

[0009] (5) Calculate the arrangement spacing value: according to the different slope and aspect of the pixel unit and the sun inclination, take the center point slope, aspect and inclination value of the pixel unit, calculate the arrangement spacing, and finally cluster according to the arrangement spacing value of different levels;

[0010] (6) Area screening: screening all the clustered partition ranges, the screening condition is that the sum of the photovoltaic module sunlit surface area is not less than the arrangement mode number, and the partition range smaller than the photovoltaic module sunlit surface area is removed;

[0011] (7) Photovoltaic module arrangement: rendering the partition range screened in step (6) and arranging the photovoltaic module.

[0012] Further, in step (5), the clustering is performed according to different levels of spacing value, specifically as follows (unit: m): 0 < x≤2, 2 < x≤2.5, 2.5 < x≤3, 3 < x≤3.5, 3.5 < x≤4, 4 < x≤4.5, 4.5 < x≤5, 5 < x≤5.5, 5.5 < x≤6, 6 < x≤6.5, 6.5 < x≤7, 7 < x≤7.5, 7.5 < x≤8, 8 < x≤8.5, 8.5 < x≤9, 9 < x≤9.5, 9.5 < x≤10, 10 < x≤10.5, 10.5 < x≤11, 11 < x≤11.5, 11.5 < x≤12, 12 < x≤12.5, 12.5 < x≤13, 13 < x≤13.5, 13.5 < x≤14, 14 < x≤14.5, 14.5 < x≤15, 15 < x.

[0013] Further, in step (7), the photovoltaic module arrangement method is: starting from the upper left corner of the partition range, arranging at equal intervals, the arrangement number = partition area / photovoltaic unit panel area x arrangement mode, when the area is less than half of the photovoltaic unit panel area, the half arrangement is adopted.

[0014] The present application has the following advantages: the present application performs terrain analysis through a web application system, and combines a graphic visualization tool and three-dimensional technology to intuitively present the photovoltaic module arrangement available area, uses a rendering technology to simulate the light change form with time, interprets the terrain structure information, extracts the best sunlight area of the site, obtains the maximum power generation benefit of the site, and can provide a reasonable photovoltaic module arrangement area for various complex terrains.

[0015] Meanwhile, the method directly operates on the web side, solves the operation mode of applying to the web side after analyzing on the desktop side, can directly realize the data analysis, parameter setting, condition screening, arrangement result and the like on the web side in the early stage, greatly reduces the tedious operation process, and has higher data security, stronger data real-time performance, more timely service response, can process a large amount of complex terrain data in a short time, provides a simple, convenient, easy-to-understand and easy-to-operate webpage algorithm analysis process for complex terrain photovoltaic component arrangement, becomes a new type of analysis mode in new energy informatization construction. BRIEF DESCRIPTION OF DRAWINGS

[0016] Fig. 1 is a contour map of the embodiment;

[0017] Fig. 2 is a DEM digital elevation model diagram of the embodiment;

[0018] Fig. 3 is a slope and slope direction parameter setting interface of the embodiment;

[0019] Fig. 4 is a slope grading display diagram of the embodiment;

[0020] Fig. 5 is a slope direction grading display diagram of the embodiment;

[0021] Fig. 6 is a range zoning diagram available in the embodiment;

[0022] Fig. 7 is a region clustering distribution diagram of the photovoltaic component arrangement area in the embodiment;

[0023] Fig. 8 is a photovoltaic component arrangement simulation diagram of the embodiment. Best mode of the present application

[0024] In order to make the technical problems and technical solutions solved by the present application clearer, the present application is further described in detail below in combination with the drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present application and do not limit the present application.

[0025] The present application provides a web-based photovoltaic component arrangement area extraction method, which analyzes the terrain through a web application system, and intuitively presents the arrangement area by combining a graphical visualization tool and three-dimensional technology, uses rendering technology to simulate the change of light with time, interprets the terrain structure information, extracts the best sunlight area of the site, obtains the maximum power generation benefit of the site, and can provide a reasonable photovoltaic component arrangement area for various complex terrains.

[0026] Taking the A block mountain as an example, the extraction of the photovoltaic component arrangement area is implemented, and the implementation process is as follows:

[0027] (1) Establish a digital elevation model: collect site contour data, contour is 10m, obtain the contour topographic map as shown in Figure 1, and generate a DEM elevation model using contour data, as shown in Figure 2. The accuracy of the contour determines the size of the minimum pixel unit, so the higher the accuracy, the better the effect. The generated digital elevation model is the data source for slope and aspect analysis.

[0028] (2) Set the slope and aspect parameters: Because the terrain of different regions is not the same, the parameters to be set are also different. Therefore, different parameters need to be set for different regions according to the site and photovoltaic module specifications, including slope threshold, sunshine angle, arrangement method, equipment module specifications, etc. The parameter setting interface is shown in Figure 3;

[0029] (3) Slope and aspect analysis: based on the site terrain data (i.e. digital elevation model), slope and aspect analysis is performed, and hierarchical display is performed, as shown in Figures 4 and 5;

[0030] (4) Calculate the pixel units that meet the conditions: based on the slope and aspect analysis (i.e. process 3), filter the pixel units that meet the parameter conditions according to the set slope and aspect parameters, and use the grid to vector range function to generate all the vector faces that meet the conditions;

[0031] (5) Cluster and merge pixel units: according to the different slope and aspect and the inclination angle of the pixel units, take the center point slope, aspect and inclination value of the pixel units, calculate the arrangement spacing, and finally cluster according to the arrangement spacing value of different levels. The clustering rules are 0 < x ≤ 2, 2 < x ≤ 2.5, 2.5 < x ≤ 3, 3 < x ≤ 3.5, 3.5 < x ≤ 4, 4 < x ≤ 4.5, 4.5 < x ≤ 5, 5 < x ≤ 5.5, 5.5 < x ≤ 6, 6 < x ≤ 6.5, 6.5 < x ≤ 7, 7 < x ≤ 7.5, 7.5 < x ≤ 8, 8 < x ≤ 8.5, 8.5 < x ≤ 9, 9 < x ≤ 9.5, 9.5 < x ≤ 10, 10 < x ≤ 10.5, 10.5 < x ≤ 11, 11 < x ≤ 11.5, 11.5 < x ≤ 12, 12 < x ≤ 12.5, 12.5 < x ≤ 13, 13 < x ≤ 13.5, 13.5 < x ≤ 14, 14 < x ≤ 14.5, 14.5 < x ≤ 15, 15 < x. The specific process is shown in Figure 6.

[0032] (6) Area screening: screen all the clustered partition ranges, the screening condition is not less than the sum of the photovoltaic module sunshine surface area of the arrangement method, and the partition range less than the sum of the photovoltaic module sunshine surface area of the arrangement method is removed. The area distribution diagram of the region that meets the condition after removal is shown in Figure 7;

[0033] (7) Photovoltaic module arrangement: the partition range screened in step (6) is rendered, and photovoltaic module arrangement is performed. The photovoltaic module arrangement method is as follows: photovoltaic modules are arranged equidistantly from the upper left corner of the partition range in a 14x2 array, and the arrangement number = partition area / photovoltaic unit panel area x arrangement mode. When the area is less than one photovoltaic module area, half arrangement is adopted considering that the area is greater than half of the photovoltaic unit panel area, and the specific arrangement is shown in FIG. 8.

[0034] The present application is described in detail above through specific and preferred embodiments, but those skilled in the art should understand that the present application is not limited to the above-mentioned embodiments, and any modification, equivalent replacement, etc. made within the spirit and principles of the present application should be included in the protection scope of the present application. Industrial applicability

[0035] The present application performs terrain analysis through a web application system, and simultaneously combines a graphic visualization tool and three-dimensional technology to intuitively present the photovoltaic module arrangement available area. The illumination change form with time is simulated using a rendering technology, and the terrain structure information is interpreted to extract the optimal sunshine area of the site, obtain the maximum power generation benefit of the site, and provide a reasonable photovoltaic module arrangement area for various complex terrains. The data analysis, parameter setting, condition screening, arrangement result, etc. in the early stage can be directly realized on the web side, greatly reducing the cumbersome operation process, and the data security is higher, the data real-time performance is stronger, and the service response is more timely. A large amount of complex terrain data can be processed in a short time, a simple and convenient webpage algorithm analysis process is provided for complex terrain photovoltaic module arrangement, and a new type of analysis mode becomes a new energy informatization construction.

Claims

1. A web-based photovoltaic module layout area extraction method, characterized in that: The steps include: (1) Establish digital elevation model: collect site contour data and generate DEM elevation model; (2) Setting slope and aspect parameters: Different parameters are set for different areas according to the site and PV module specifications. The parameters include slope threshold, sunshine angle, layout method, and equipment module specifications. (3) Slope and aspect analysis: Slope and aspect analysis is conducted based on site topographic data, and graded presentation is performed; (4) Extracting pixel units that meet the conditions: Based on the slope and aspect analysis, according to the set slope and aspect parameters, screen the pixel units that meet the parameter conditions, and use the raster to vector range function to generate all vector surfaces that meet the conditions; (5) Calculate the layout spacing value: According to the different slopes and directions of the pixel units and the sunshine inclination angle, the slope, direction and inclination angle values ​​of the center point of the pixel unit are taken to calculate the layout spacing, and finally clustering is performed according to the layout spacing values ​​of different levels; (6) Area screening: All clustered partitions are screened. The screening condition is that the total solar exposure area of ​​the photovoltaic modules is not less than the total solar exposure area of ​​the photovoltaic modules in the number of arrangement modes. Partitions with a solar exposure area less than the total solar exposure area of ​​the photovoltaic modules in the number of arrangement modes are removed. (7) Layout of photovoltaic modules: Render the partitioned area selected in step (6) and arrange the photovoltaic modules.

2. The method for extracting photovoltaic module layout areas based on a Web according to claim 1, characterized in that: In step (5), clustering is performed according to the spacing values ​​at different levels, as follows (unit: m): 0<x≤2, 2<x≤2.5, 2.5<x≤3, 3<x≤3.5, 3.5<x≤4, 4 <x≤4.5,4.5<x≤5、5<x≤5.5、5.5<x≤6、6<x≤6.5、6.5<x≤7、7<x≤7.5、7.5<x≤8、8<x≤8.5、8.5<x≤9、9<x≤9.5、9.5<x≤10、10<x≤10.5、10.5<x≤11、11<x≤11.5、11.5<x≤12、12<x≤12.5、12.5<x≤13、13<x≤13.5、13.5<x≤14、14<x≤14.5、14.5<x≤15、15<x。 3. The method for extracting photovoltaic module layout areas based on a Web according to claim 1, characterized in that: The photovoltaic module arrangement method in step (7) is: starting from the upper left corner of the partition range, the arrangement number = partition area / photovoltaic unit panel area × arrangement method. When the area is less than one photovoltaic module, the area is considered to be greater than half of the photovoltaic unit panel area and a half-half arrangement is adopted.

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