Inclination angle adjusting method, device and equipment of flexible photovoltaic support and storage medium

Abstract

The invention discloses an inclination angle adjusting method and device of a flexible photovoltaic support, equipment and a storage medium, and relates to the technical field of photovoltaics, and the method utilizes the characteristic that the inclination angle of a photovoltaic panel of the flexible photovoltaic support can be adjusted by winding and unwinding an upper string cable and a lower string cable. By analyzing the linear relationship between the lengths of the upper and lower string cables of the flexible photovoltaic bracket and the inclination angle of the photovoltaic panel, the relationship between the retraction length change behavior and the inclination angle change behavior is determined, and a quantitative basis is provided for subsequently adjusting the inclination angle according to the solar radiation distribution. A solar high-radiation habit area is defined according to extreme value distribution in solar radiation distribution, and the inclination angle is adjusted according to the distance between the photovoltaic panel and the center of the solar high-radiation habit area, so that the farther the photovoltaic panel is away from the radiation center, the larger the inclination angle is, and the panel surface of the photovoltaic panel can face the radiation center in a larger area. Therefore, the light receiving efficiency is improved. The invention provides an inclination angle adjusting mode which is unique in standard, can be quantified and is relatively accurate.

Description

Technical Field

[0001] The present application relates to the field of photovoltaic technology, and in particular, to a method, device, equipment, and storage medium for adjusting the inclination angle of a flexible photovoltaic support. Background Art

[0002] A flexible photovoltaic support is a large-span photovoltaic module support structure designed based on a tension structure system and using cables as component support members. Compared with traditional rigid supports, it has the characteristics of "large span, high clearance, and long row spacing", which enable the flexible support to adapt to more complex and diverse installation environments. The structure of the flexible photovoltaic support uses prestressed chords (steel wires) tensioned between two fixed points at both ends, and the two fixed points use a rigid structure and an outer stay cable to provide support force, adapting to situations such as mountain undulations and increased vegetation. Only by setting a foundation at a suitable position and tensioning the prestressed steel strands or steel wires can a structure of rigid columns, foundations, and flexible supports be realized in lakes and fish ponds under the condition of constant water level.

[0003] Currently, the inclination angle adjustment method for flexible photovoltaic supports is usually directly determined by the empirical method, and the determination methods are diverse and not unified. Specifically: in the Northern Hemisphere, the optimal installation angle of the photovoltaic panel is approximately between 30 degrees and 40 degrees because the altitude angle of the sun in the sky in the Northern Hemisphere is relatively low, while in the Southern Hemisphere, the optimal installation angle of the photovoltaic panel is approximately between 50 degrees and 60 degrees; the inclination angle of a fixedly installed photovoltaic solar panel is usually set between 28 degrees and 35 degrees; if equipped with an adjustable installation system, the inclination angle in summer can be set between 20 degrees and 25 degrees, and in winter it can be adjusted to 45 degrees to 50 degrees; the inclination angle of a fixed solar panel is generally between 20 degrees and 30 degrees, which can balance the daily average receiving efficiency of the solar panel and adapt to the changes in the photovoltaic power output under different seasons and weather conditions. Generally speaking, the optimal photovoltaic inclination angle under different latitudes is the local latitude plus 5 degrees to 10 degrees.

[0004] As can be seen from the above, the entire process of adjusting the inclination angle of the flexible photovoltaic support is set by artificial subjective experience, resulting in the introduction of subjective experience errors. Not only can different inclination angles not be customized for different regions, but the standards set by artificial subjectivity are not unified, further amplifying the errors, resulting in insufficient utilization of light resources, and further leading to an unsatisfactory power generation efficiency of the flexible photovoltaic array. Summary of the Invention

[0005] The main objective of this application is to provide a method, device, equipment, and storage medium for adjusting the tilt angle of a flexible photovoltaic support, aiming to solve the problem in the prior art that the tilt angle adjustment of the flexible photovoltaic support is set subjectively based on manual experience throughout the process, resulting in the introduction of subjective experience errors. Not only can different tilt angles not be customized according to different regions, but also the standards for manual subjective setting are not unified, further amplifying the errors, leading to insufficient utilization of light resources, and ultimately resulting in an unsatisfactory power generation efficiency of the flexible photovoltaic array.

[0006] To achieve the above objective, this application provides the following technical solutions:

[0007] A method for adjusting the tilt angle of a flexible photovoltaic support, which is applied to a flexible photovoltaic support deployed in a preset area. The flexible photovoltaic support includes two steel beam frames fixed to the ground, an upper chord cable and a lower chord cable spanned between the two steel beam frames, and a plurality of photovoltaic panels installed on the upper chord cable and the lower chord cable. The tilt angle adjustment method includes:

[0008] Step S1, adjust the initial use length of the upper chord cable several times within the maximum allowable tensile stress range of the upper chord cable with a preset adjustment length, and obtain the real-time tilt angle of each photovoltaic panel, the real-time use length of the upper chord cable, and the real-time tensile stress of the upper chord cable once for each adjustment;

[0009] Step S2, adjust the initial use length of the lower chord cable several times within the maximum allowable tensile stress range of the lower chord cable with the preset adjustment length, and obtain the real-time tilt angle of each photovoltaic panel, the real-time use length of the lower chord cable, and the real-time tensile stress of the lower chord cable once for each adjustment;

[0010] Step S3, analyze the mutual relationships between all real-time tilt angles and the real-time use lengths of all upper chord cables, the real-time tensile stresses of all upper chord cables, the real-time use lengths of all lower chord cables, and the real-time tensile stresses of all lower chord cables through multiple linear regression to obtain the tilt angle and chord length relationship formula;

[0011] Step S4, obtain all the maximum values of the solar radiation distribution in the preset area, and the smallest covering circle of all the maximum values;

[0012] Step S5, define a length interval from zero to the radius length based on the radius length of the smallest covering circle;

[0013] Step S6, obtain the maximum tilt angle of each photovoltaic panel based on the tilt angle and chord length relationship formula, and define an angle interval from zero degree to the maximum tilt angle;

[0014] Step S7, obtain the horizontal distance between the flexible photovoltaic support and the center of the smallest covering circle, and the data position corresponding to the horizontal distance in the length interval;

[0015] Step S8, obtaining the same data position within the angle range based on the data position, which is the optimal tilt angle of the flexible photovoltaic support;

[0016] Step S9, substituting the optimal tilt angle into the relationship between the tilt angle and the chord length to obtain the optimal usage length of the upper chord cable and the optimal usage length of the lower chord cable.

[0017] As a further improvement of this application, in step S9, after substituting the optimal tilt angle into the relationship between the tilt angle and the chord length to obtain the optimal usage length of the upper chord cable and the optimal usage length of the lower chord cable, it includes:

[0018] Step S10, keeping the midpoint position of the upper chord cable stationary based on the relative positions of the two steel beam frames;

[0019] Step S20, based on the two steel beam frames, simultaneously relaxing or tightening the upper chord cable within the maximum allowable tensile stress range of the upper chord cable through an external pulling member to achieve the optimal usage length of the upper chord cable;

[0020] Step S30, keeping the midpoint position of the lower chord cable stationary based on the relative positions of the two steel beam frames;

[0021] Step S40, based on the two steel beam frames, simultaneously relaxing or tightening the lower chord cable within the maximum allowable tensile stress range of the lower chord cable through the external pulling member to achieve the optimal usage length of the lower chord cable.

[0022] As a further improvement of this application, in step S3, by performing multiple linear regression to analyze the mutual relationships between all real-time tilt angles and the real-time usage lengths of all upper chord cables, the real-time tensile stresses of all upper chord cables, the real-time usage lengths of all lower chord cables, and the real-time tensile stresses of all lower chord cables, to obtain the relationship between the tilt angle and the chord length, including:

[0023] Step S31, performing normalization processing on all real-time tilt angles, the real-time usage lengths of all upper chord cables, the real-time tensile stresses of all upper chord cables, the real-time usage lengths of all lower chord cables, and the real-time tensile stresses of all lower chord cables;

[0024] Step S32, defining the current real-time tilt angle as a dependent variable;

[0025] Step S33, defining the real-time usage length of the upper chord cable, the real-time tensile stress of the upper chord cable, the real-time usage length of the lower chord cable, and the real-time tensile stress of the lower chord cable corresponding to the current real-time tilt angle as a set of independent variables;

[0026] Step S34, defining the linear regression relationship between the current dependent variable and the current all independent variables through multiple linear regression;

[0027] Step S35, solve all the linear regression coefficients of the multiple linear regression model;

[0028] Step S36, substitute all the obtained regression coefficients into all the linear regression relationships to obtain the relationship between the tilt angle and the chord length.

[0029] As a further improvement of the present application, step S4, obtain all the maximum values of the solar radiation distribution in the preset area, and the minimum covering circle of all the maximum values, including:

[0030] Step S41, obtain all the maximum values of the solar radiation distribution in the preset area;

[0031] Step S42, respectively obtain the elevation coordinates corresponding to each maximum value and integrate all the elevation coordinates into a coordinate data set U = (P 1 , P 2 , …, P k , …, P m ), where P k is the k-th elevation coordinate and m is the number of all elevation coordinates;

[0032] Step S43, obtain the abscissas of all the elevation coordinates and integrate them into an abscissa data set Ux = (P 1x , P 2x , …, P kx , …, P mx ), where P kx is the abscissa of the k-th elevation coordinate;

[0033] Step S44, calculate the expected value μ x and the standard deviation σ x of each abscissa based on the abscissa data set;

[0034] Step S45, integrate the ordinates of all the elevation coordinates into an ordinate data set Uy = (P 1y , P 2y , …, P ky , …, P my ), where P ky is the ordinate of the k-th elevation coordinate;

[0035] Step S46, calculate the expected value μ y and the standard deviation σ y of each ordinate based on the ordinate data set;

[0036] Step S47, when and , then determine that P k is a valid elevation coordinate;

[0037] Step S48, when or then it is determined that P k is an outlier;

[0038] Step S49, obtain the minimum covering circle of all valid elevation coordinates and substitute it into Step S5.

[0039] As a further improvement of the present application, in Step S41, obtain all maxima of the solar radiation distribution in the preset area, including:

[0040] Step S411, obtain the solar radiation distribution through one of downloading through public channels and instrument measurement;

[0041] Step S412, obtain all maxima of the solar radiation distribution greater than or equal to the preset intensity threshold.

[0042] As a further improvement of the present application, in Step S49, obtain the minimum covering circle of all valid elevation coordinates and substitute it into Step S5, including:

[0043] Step S491, generate a plane rectangular coordinate system based on an arbitrary horizontal plane, and vertically project all valid elevation coordinates onto the plane rectangular coordinate system to form a number of projected coordinate points;

[0044] Step S492, obtain any two coordinate points p 1 and p 2 , and obtain an initial circle C 1 p 2 with the line segment p 2 as the diameter, where the subscript 2 of the initial circle C 2 represents the number of projected coordinate points inside the initial circle;

[0045] Step S493, sequentially traverse each projected coordinate point, and determine whether the i-th projected coordinate point p i is located in the first iteration circle C i-1 . If the i-th projected coordinate point p i is not located inside the first iteration circle C i-1 , then execute Step S494;

[0046] Step S494, obtain a second iteration circle C 1 p i with the line segment p i as the diameter;

[0047] Step S495, determine whether the j-th projected coordinate point p j is located in the second iteration circle C iinside, where j < i, if the j-th projected coordinate point p j is not located within the second iterative circle C i inside, then perform step S496;

[0048] Step S496, using the line segment p 1 p j as the diameter to obtain the third iterative circle C j ;

[0049] Step S497, determine whether the k-th projected coordinate point p k is located within the third iterative circle C j inside, where k < j < i, if the k-th projected coordinate point p k is not located within the third iterative circle C j inside, then perform step S498;

[0050] Step S498, connect p i 、p j 、p k to form a triangle, and obtain the circumcircle of the triangle, which is the minimum covering circle of all valid elevation coordinates;

[0051] Step S499, substitute the minimum covering circle of all valid elevation coordinates into step S5.

[0052] As a further improvement of this application, in step S9, substitute the optimal tilt angle into the relationship between the tilt angle and the chord length to obtain the optimal use length of the upper chord cable and the optimal use length of the lower chord cable, and then, it includes:

[0053] Step S100, generate a visualization digital model based on the preset area and the flexible photovoltaic support;

[0054] Step S200, mark the optimal use length of the upper chord cable, the optimal use length of the lower chord cable, and the optimal tilt angle at a position adjacent to the flexible photovoltaic support in the visualization digital model to form a marked visualization digital model;

[0055] Step S300, send the marked visualization digital model to an external visualization monitoring terminal.

[0056] To achieve the above object, this application also provides the following technical solutions:

[0057] An inclination angle adjusting device for a flexible photovoltaic support, the inclination angle adjusting device is applied to the inclination angle adjusting method as described above, and the inclination angle adjusting device includes:

[0058] The upper chord parameter acquisition module is used to adjust the initial use length of the upper chord several times within the maximum allowable tensile stress range of the upper chord by a preset adjustment length, and obtain the real-time tilt angle of each photovoltaic panel, the real-time use length of the upper chord, and the real-time tensile stress of the upper chord once for each adjustment;

[0059] The lower chord parameter acquisition module is used to adjust the initial use length of the lower chord several times within the maximum allowable tensile stress range of the lower chord by the preset adjustment length, and obtain the real-time tilt angle of each photovoltaic panel, the real-time use length of the lower chord, and the real-time tensile stress of the lower chord once for each adjustment;

[0060] The tilt angle and chord analysis module is used to analyze the mutual relationship between all real-time tilt angles and the real-time use lengths of all upper chords, the real-time tensile stresses of all upper chords, the real-time use lengths of all lower chords, and the real-time tensile stresses of all lower chords through multiple linear regression, and obtain the tilt angle and chord length relationship formula;

[0061] The solar radiation extreme value delineation module is used to obtain all the maximum values of the solar radiation distribution in the preset area, and the minimum covering circle of all the maximum values;

[0062] The length interval definition module is used to define a length interval from zero to the radius length based on the radius length of the minimum covering circle;

[0063] The angle interval definition module is used to obtain the maximum tilt angle of each photovoltaic panel based on the tilt angle and chord length relationship formula, and define an angle interval from zero degree to the maximum tilt angle;

[0064] The horizontal distance data position acquisition module is used to obtain the horizontal distance between the flexible photovoltaic support and the center of the minimum covering circle, and the data position corresponding to the horizontal distance in the length interval;

[0065] The data position tilt angle matching module is used to obtain the same data position in the angle interval based on the data position, which is the best tilt angle of the flexible photovoltaic support;

[0066] The best use length calculation module of the chord is used to substitute the best tilt angle into the tilt angle and chord length relationship formula to obtain the best use length of the upper chord and the best use length of the lower chord.

[0067] To achieve the above object, the present application also provides the following technical solutions:

[0068] An electronic device includes a processor and a memory coupled to the processor, and the memory stores program instructions executable by the processor; when the processor executes the program instructions stored in the memory, the above-mentioned tilt angle adjustment method is implemented.

[0069] To achieve the above object, the present application also provides the following technical solutions:

[0070] A storage medium stores program instructions therein, and when the program instructions are executed by a processor, the above-mentioned tilt angle adjustment method can be implemented.

[0071] In this application, the initial service length of the upper chord cable is adjusted several times within the maximum allowable tensile stress range of the upper chord cable with a preset adjustment length. Based on each adjustment, the real-time tilt angle of each photovoltaic panel, the real-time service length of the upper chord cable, and the real-time tensile stress of the upper chord cable are obtained once; the initial service length of the lower chord cable is adjusted several times within the maximum allowable tensile stress range of the lower chord cable with a preset adjustment length. Based on each adjustment, the real-time tilt angle of each photovoltaic panel, the real-time service length of the lower chord cable, and the real-time tensile stress of the lower chord cable are obtained once; the mutual relationships between all the real-time tilt angles and the real-time service lengths of all the upper chord cables, the real-time tensile stresses of all the upper chord cables, the real-time service lengths of all the lower chord cables, and the real-time tensile stresses of all the lower chord cables are analyzed through multiple linear regression to obtain the relationship formula between the tilt angle and the chord length; all the maximum values of the solar radiation distribution in the preset area are obtained, as well as the minimum covering circle of all the maximum values; a length interval from zero to the radius length is defined based on the radius length of the minimum covering circle; the maximum tilt angle of each photovoltaic panel is obtained based on the relationship formula between the tilt angle and the chord length, and an angle interval from zero degree to the maximum tilt angle is defined; the horizontal distance between the flexible photovoltaic support and the center of the minimum covering circle is obtained, as well as the data position corresponding to the length interval of the horizontal distance; the same data position in the angle interval is obtained based on the data position, which is the optimal tilt angle of the flexible photovoltaic support; the optimal tilt angle is substituted into the relationship formula between the tilt angle and the chord length to obtain the optimal service length of the upper chord cable and the optimal service length of the lower chord cable. This application utilizes the characteristic that the tilt angle of the photovoltaic panel of the flexible photovoltaic support can be adjusted by retracting and releasing the upper and lower chord cables. By analyzing the linear relationship between the lengths of the upper and lower chord cables of the flexible photovoltaic support and the tilt angle of the photovoltaic panel, the relationship between the behavior of changing the retracting and releasing length and the behavior of changing the tilt angle is clarified, providing a quantitative basis for adjusting the tilt angle according to the solar radiation distribution subsequently. Then, the solar high-radiation habitual area is defined according to the extreme value distribution in the solar radiation distribution. Finally, the tilt angle is adjusted according to the distance between the photovoltaic panel and the center of the solar high-radiation habitual area, realizing that the farther the photovoltaic panel is from the radiation center, the larger the tilt angle, so that the panel of the photovoltaic panel can face the radiation center with a larger area, thereby improving the light-receiving efficiency. Compared with the manual subjective experience setting in the prior art, this application provides a tilt angle adjustment method with a unique standard, quantifiable, and relatively accurate, without the need for manual participation throughout the process, avoiding the tilt angle adjustment error caused by the previous manual subjective experience. BRIEF DESCRIPTION OF THE DRAWINGS

[0072] Figure 1 It is a schematic flow chart of the steps of an embodiment of the tilt angle adjustment method for the flexible photovoltaic support of this application;

[0073] Figure 2 It is a schematic functional module diagram of an embodiment of the tilt angle adjustment device for the flexible photovoltaic support of this application;

[0074] Figure 3 It is a schematic structural diagram of an embodiment of the electronic device of this application;

[0075] Figure 4 This is a schematic structural diagram of an embodiment of the storage medium of the present application. Specific embodiments

[0076] Next, the technical solutions in the embodiments of the present application will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present application. Obviously, the described embodiments are only a part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the scope of protection of the present application.

[0077] The terms "first", "second", and "third" in the present application are only used for descriptive purposes, and cannot be construed as indicating or implying relative importance or implicitly indicating the quantity of the indicated technical features. Thus, the features defined with "first", "second", and "third" may explicitly or implicitly include at least one of the features. In the description of the present application, the meaning of "a plurality" is at least two, such as two, three, etc., unless otherwise specifically and clearly defined. All directional indications (such as up, down, left, right, front, back...) in the embodiments of the present application are only used to explain the relative positional relationship and movement conditions between components in a specific posture (as shown in the drawings). If the specific posture changes, the directional indications will also change accordingly. In addition, the terms "comprising" and "having" and any variations thereof are intended to cover non-exclusive inclusion. For example, a process, method, system, product, or device that includes a series of steps or units is not limited to the listed steps or units, but optionally further includes steps or units not listed, or optionally further includes other steps or units inherent to these processes, methods, products, or devices.

[0078] Referring to "embodiments" herein means that the specific features, structures, or characteristics described in conjunction with the embodiments may be included in at least one embodiment of the present application. The phrase appears in various places in the specification does not necessarily refer to the same embodiment, nor is it an independent or alternative embodiment mutually exclusive with other embodiments. Those skilled in the art will explicitly and implicitly understand that the embodiments described herein may be combined with other embodiments.

[0079] As Figure 1 shown, this embodiment provides an embodiment of a method for adjusting the tilt angle of a flexible photovoltaic bracket. In this embodiment, the tilt angle adjustment method is applied to a flexible photovoltaic bracket that has been deployed in a preset area. The flexible photovoltaic bracket includes two steel beam frames fixed to the ground, an upper chord cable and a lower chord cable arranged between the two steel beam frames, and a plurality of photovoltaic panels installed on the upper chord cable and the lower chord cable.

[0080] Preferably, two anchoring cables are also required to fix the upper chord cable and the lower chord cable. One end of each anchoring cable bypasses the steel beam frame and is anchored to the ground, and the other end of each anchoring cable is fixedly connected to the upper chord cable or the lower chord cable. The upper chord cable, the lower chord cable, and the anchoring cables are all made of steel strands with a diameter of 15.2 mm. Then, the photovoltaic panels are installed on the upper chord cable and the lower chord cable. The two steel beam frames are "1-span", and the site selection methods in the following text of this embodiment are all based on the midpoint of the "1-span" for site selection. Generally, 16 photovoltaic panels are installed in each span, the interval between the photovoltaic panels is 30 mm, and the interval of the photovoltaic panels at the mid-span position is 300 mm. The length of a single photovoltaic panel is 2278 mm, the width is 1134 mm, and the thickness is 30 mm.

[0081] Specifically, the tilt angle adjustment method includes the following steps:

[0082] Step S1, within the maximum allowable tensile stress range of the upper chord cable, adjust the initial use length of the upper chord cable several times with a preset adjustment length, and obtain the real-time tilt angle of each photovoltaic panel, the real-time use length of the upper chord cable, and the real-time tensile stress of the upper chord cable once for each adjustment.

[0083] Step S2, within the maximum allowable tensile stress range of the lower chord cable, adjust the initial use length of the lower chord cable several times with a preset adjustment length, and obtain the real-time tilt angle of each photovoltaic panel, the real-time use length of the lower chord cable, and the real-time tensile stress of the lower chord cable once for each adjustment.

[0084] Preferably, the maximum allowable tensile stress of the upper chord cable and the lower chord cable can be directly obtained from the manufacturer or measured by oneself.

[0085] Step S3, analyze the mutual relationship between all real-time tilt angles and the real-time use lengths of all upper chord cables, the real-time tensile stresses of all upper chord cables, the real-time use lengths of all lower chord cables, and the real-time tensile stresses of all lower chord cables through multiple linear regression to obtain the relationship formula between the tilt angle and the chord length.

[0086] Preferably, LASSO linear regression is preferred in this embodiment.

[0087] Step S4, obtain all the maximum values of the solar radiation distribution in the preset area, and the minimum covering circle of all the maximum values.

[0088] Step S5, define a length interval from zero to the radius length based on the radius length of the minimum covering circle.

[0089] For example, if the radius of the minimum covering circle is 3 km, the length interval is [0, 3 km], where 0 is at the center of the circle and 3 km is at the circumference.

[0090] Step S6, obtain the maximum tilt angle of each photovoltaic panel based on the relationship formula between the tilt angle and the chord length, and define an angle interval from zero degree to the maximum tilt angle.

[0091] For example, the maximum tilt angle of a certain type of flexible photovoltaic support can reach 45 degrees, and the tilt angle during normal use is 15 degrees to 20 degrees. Then the angle range is [0, 45°].

[0092] Step S7: Obtain the horizontal distance between the flexible photovoltaic support and the center of the minimum covering circle, as well as the data position corresponding to the horizontal distance in the length interval.

[0093] For example, if the horizontal distance between a certain flexible photovoltaic support and the center of the minimum covering circle is 1.5 km, then the corresponding data position is 1.5 km / 3 km = 0.5, that is, the 50% data position.

[0094] Step S8: Based on the data position, obtain the same data position in the angle range, which is the optimal tilt angle of the flexible photovoltaic support.

[0095] For example, if the data position of the above flexible photovoltaic support is 50%, then it corresponds to the 50% data position in the angle range [0, 45°], that is, 22.5°.

[0096] Step S9: Substitute the optimal tilt angle into the relationship between the tilt angle and the chord length to obtain the optimal use length of the upper chord cable and the optimal use length of the lower chord cable.

[0097] For example, substituting 22.5° into the relationship of a certain type of flexible photovoltaic support, the use length of the upper chord cable is 31.33 m, and the use length of the lower chord cable is 35.71 m.

[0098] It should be noted that the use length is the length of the steel cable between two steel beam frames. Since the steel cable will definitely present a catenary state and cannot be a straight line, in this embodiment, the specific relationship is calculated through linear regression.

[0099] Preferably, since the steel cable will definitely present a catenary state, strictly speaking, there are slight differences in the tilt angles of each photovoltaic panel. When the computing power of the computer permits, the linear regression relationship can be calculated once for each individual photovoltaic panel.

[0100] Further, in step S9, substitute the optimal tilt angle into the relationship between the tilt angle and the chord length to obtain the optimal use length of the upper chord cable and the optimal use length of the lower chord cable. After that, the following steps are further included:

[0101] Step S10: Keep the midpoint position of the upper chord cable stationary based on the relative positions of the two steel beam frames.

[0102] Step S20: Based on the two steel beam frames, simultaneously relax or tighten the upper chord cable within the maximum allowable tensile stress range of the upper chord cable through an external pulling member to achieve the optimal use length of the upper chord cable.

[0103] Step S30, keep the midpoint position of the lower chord cable stationary based on the relative positions of the two steel beam frames.

[0104] Step S40, based on the two steel beam frames, simultaneously relax or tighten the lower chord cable within the maximum allowable tensile stress range of the lower chord cable through an external tension member to achieve the optimal service length of the lower chord cable.

[0105] Preferably, in this embodiment, by simultaneously retracting and releasing both ends of the steel cable, it is ensured that the photovoltaic panel is relatively stationary in the vertical plane, preventing the photovoltaic panel from hitting the steel beam frame.

[0106] Once again, it is stated that the service length is the length of the steel cable between the two steel beam frames, and the steel cable parts outside the two steel beam frames are not included.

[0107] Further, in step S3, through multiple linear regression, analyze the mutual relationships between all real-time tilt angles and the real-time service lengths of all upper chord cables, the real-time tensile stresses of all upper chord cables, the real-time service lengths of all lower chord cables, and the real-time tensile stresses of all lower chord cables, and obtain the relationship formula between the tilt angle and the chord length. The specific steps are as follows:

[0108] Step S31, perform normalization processing on all real-time tilt angles, the real-time service lengths of all upper chord cables, the real-time tensile stresses of all upper chord cables, the real-time service lengths of all lower chord cables, and the real-time tensile stresses of all lower chord cables.

[0109] Step S32, define the current real-time tilt angle as a dependent variable.

[0110] Step S33, define the real-time service length of the upper chord cable, the real-time tensile stress of the upper chord cable, the real-time service length of the lower chord cable, and the real-time tensile stress of the lower chord cable corresponding to the current real-time tilt angle as a set of independent variables.

[0111] Step S34, define the linear regression relationship between the current dependent variable and the current all independent variables through multiple linear regression.

[0112] Preferably, the multiple linear regression is shown as the following formula:

[0113]

[0114] Among them, y i is the dependent variable of the i-th real-time tilt angle, n is the total number of all real-time tilt angles, β 0 is the intercept of the linear regression relationship, β j is the linear regression coefficient of the j-th independent variable, m is the total number of independent variables in a set of independent variables, x j,i is the j-th independent variable corresponding to the i-th real-time tilt angle, and δ is the random error of the linear regression relationship.

[0115] It should be noted that the above additional content is only for principle explanation, and the symbolic meanings of the above additional content are not interoperable with those in other parts of this embodiment. If there are repeated symbols in the additional content at different positions, please understand them separately and do not relate them to each other.

[0116] Step S35: Solve all the linear regression coefficients of the multiple linear regression model.

[0117] Preferably, all the linear regression coefficients of the multiple linear regression can be solved by the least squares method, and the least squares method is shown as follows:

[0118]

[0119] Where, is the estimated value of β j , j = 1, 2, …, m, X is the matrix of all independent variables, X T is the transpose matrix of matrix X.

[0120] Preferably, since this embodiment lists four independent variables, then m = 4. If additional independent variables need to be added, they can be directly added.

[0121] It should be noted that the above additional content is only for principle explanation, and the symbolic meanings of the above additional content are not interoperable with those in other parts of this embodiment. If there are repeated symbols in the additional content at different positions, please understand them separately and do not relate them to each other.

[0122] Step S36: Substitute all the solved regression coefficients into all the linear regression relationships to obtain the relationship between the tilt angle and the chord length.

[0123] Preferably, the residual sum of squares of the linear regression can be used to judge the fitting effect of the model by comparing its magnitude. The residual sum of squares (RSS) is the sum of the squares of the differences between the actual observed values and the values predicted by the regression equation, and is used to quantify the difference between the model predicted values and the actual values.

[0124] Preferably, the judgment criterion for the residual sum of squares is that the smaller the better. That is, the smaller the residual sum of squares, the closer the predicted values of the model are to the actual observed values, and the better the fitting effect of the model; on the contrary, if the residual sum of squares is large, it indicates that there is a large deviation between the predicted values of the model and the actual observed values, and the fitting effect of the model is poor.

[0125] Furthermore, step S4: Obtain all the maximum values of the solar radiation distribution in the preset area, and the minimum covering circle of all the maximum values, which specifically includes the following steps:

[0126] Step S41: Obtain all the maximum values of the solar radiation distribution in the preset area.

[0127] Step S42: Obtain the elevation coordinates corresponding to each maximum value respectively, and integrate all the elevation coordinates into a coordinate data set U = (P 1 , P 2 , …, P k , …, P m ), where P k is the k-th elevation coordinate, and m is the number of all elevation coordinates.

[0128] Step S43: Obtain the abscissas of all the elevation coordinates and integrate them into an abscissa data set Ux = (P 1x , P 2x , …, P kx , …, P mx ), where P kx is the abscissa of the k-th elevation coordinate.

[0129] Step S44: Calculate the expected value μ x and the standard deviation σ x of each abscissa respectively based on the abscissa data set.

[0130] Step S45: Integrate the ordinates of all the elevation coordinates into an ordinate data set Uy = (P 1y , P 2y , …, P ky , …, P my ), where P ky is the ordinate of the k-th elevation coordinate.

[0131] Step S46: Calculate the expected value μ y and the standard deviation σ y of each ordinate respectively based on the ordinate data set.

[0132] Step S47: When and , then determine that P k is a valid elevation coordinate.

[0133] Step S48: When or , then determine that P k is an outlier.

[0134] Step S49: Obtain the minimum covering circle of all the valid elevation coordinates and substitute it into Step S5.

[0135] Furthermore, in Step S41, obtain all the maximum values of the solar radiation distribution in the preset area, which specifically includes the following steps:

[0136] Step S411: Obtain the solar radiation distribution through one of downloading from public channels and instrument measurement.

[0137] Step S412: Obtain all the maxima where the solar radiation distribution is greater than or equal to the preset intensity threshold.

[0138] Preferably, the preset intensity threshold can be set to two-thirds or three-fourths of the maximum light intensity in the preset area. The larger the preset intensity threshold, the fewer the number of maxima, and the smaller the minimum covering circle of the maxima. Conversely, to ensure that the site selection area of this embodiment is neither too large nor too small, relatively moderate values can be selected for the above two thresholds.

[0139] Preferably, the light intensity distribution can be directly queried from public channels or measured independently.

[0140] For example, the light intensity distribution in this embodiment can be obtained through various methods, including using professional equipment, software, and meteorological data platforms.

[0141] Among them, professional measuring equipment can use pyroelectric detectors, CCD / CMOS cameras, linear detector arrays, thermal imagers, and illuminometers and other professional equipment to measure the light intensity distribution. These devices have their own characteristics and are suitable for different measurement scenarios and requirements. For example, pyroelectric detectors have a fast response speed and are suitable for measuring pulsed lasers; CCD / CMOS cameras can capture the intensity distribution image when the laser beam passes through a specific plane.

[0142] Among them, software-assisted analysis can be carried out on the basis of measuring with professional equipment and can be combined with specialized software for analysis and processing to obtain more accurate light intensity distribution information. These software usually have functions such as data processing, image analysis, and visualization.

[0143] Among them, obtaining through the meteorological data platform is for the light intensity distribution of a large area, and it is obtained through data released by the meteorological data platform or authoritative institutions. These platforms usually integrate solar radiation data from multiple international institutions and provide data query services on a monthly, daily, or even hourly basis.

[0144] Among them, for the light intensity distribution of a small area with low precision, a smartphone and software can be used for measurement. The front camera and light sensor of the mobile phone are used to measure the light intensity and display the current light intensity value. Although this method is relatively simple and easy to operate, its measurement accuracy and range may be affected by the mobile phone configuration and measurement environment.

[0145] Further, in step S49, obtain the minimum covering circle of all valid elevation coordinates and substitute it into step S5, which specifically includes the following steps:

[0146] Step S491: Generate a plane rectangular coordinate system based on an arbitrary horizontal plane, and vertically project all valid elevation coordinates onto the plane rectangular coordinate system to form a number of projected coordinate points.

[0147] Step S492: Obtain any two coordinate points p 1 and p 2 from all the projected coordinate points, and obtain an initial circle C 1 with the line segment p 2 p 2 as the diameter, where the subscript 2 of the initial circle C 2 represents the number of projected coordinate points inside the initial circle.

[0148] Step S493: Traverse each projected coordinate point in sequence, and determine whether the i-th projected coordinate point p i is located inside the first iterative circle C i-1 . If the i-th projected coordinate point p i is not located inside the first iterative circle C i-1 , then execute Step S494.

[0149] Step S494: Obtain a second iterative circle C 1 with the line segment p i p i as the diameter.

[0150] Step S495: Determine whether the j-th projected coordinate point p j is located inside the second iterative circle C i , where j < i. If the j-th projected coordinate point p j is not located inside the second iterative circle C i , then execute Step S496.

[0151] Step S496: Obtain a third iterative circle C 1 with the line segment p j p j as the diameter.

[0152] Step S497: Determine whether the k-th projected coordinate point p k is located inside the third iterative circle C j , where k < j < i. If the k-th projected coordinate point p k is not located inside the third iterative circle C j , then execute Step S498.

[0153] Step S498: Connect p i , p j , p k to form a triangle, and obtain the circumcircle of the triangle. The circumcircle is the minimum covering circle of all valid elevation coordinates.

[0154] Step S499, substitute the minimum covering circle of all valid elevation coordinates into Step S5.

[0155] Further, in Step S9, substitute the optimal tilt angle into the relationship between the tilt angle and the chord length to obtain the optimal usable length of the upper chord cable and the optimal usable length of the lower chord cable. After that, the following steps are also included:

[0156] Step S100, generate a visual digital model based on the preset area and the flexible photovoltaic support.

[0157] Step S200, mark the optimal usable length of the upper chord cable, the optimal usable length of the lower chord cable, and the optimal tilt angle at the position adjacent to the flexible photovoltaic support in the visual digital model to form a marked visual digital model.

[0158] Step S300, send the marked visual digital model to an external visual monitoring terminal.

[0159] Preferably, Steps S100 to S300 can be implemented through visualization software for photovoltaic arrays, such as PVSyst, Helioscope, Aurora Solar, Candela3D, PV Designer, SolarStation, and other software developed based on the Unity3D engine.

[0160] Among them, PVSyst is a photovoltaic system design and simulation software that can be used to simulate and design photovoltaic systems, covering elements such as component arrays, tilt angles, and directions, and realizing the visualization of the photovoltaic array layout.

[0161] Among them, Helioscope is an online photovoltaic design software that creates a three-dimensional model of the project with the help of satellite images, covering details such as buildings, trees, and terrain, so as to carry out the three-dimensional layout design of the photovoltaic array.

[0162] Among them, Aurora Solar is a photovoltaic system design and optimization software that provides a shadow analysis tool to determine the optimal location and component layout of the photovoltaic system and realize the effective layout of the photovoltaic array.

[0163] Among them, Candela3D is software designed for photovoltaic power stations in complex terrains and flat terrains, providing a real full three-dimensional design experience. Users can directly obtain terrain data from satellite maps and easily arrange photovoltaic arrays.

[0164] Among them, PV Designer and SketchUp can be used for designing the photovoltaic array layout and building shadow analysis, providing three-dimensional design functions.

[0165] Among them, SolarStation is a 2D and 3D integrated photovoltaic power station design software for photovoltaic power stations such as complex mountainous areas, large ground areas, and industrial and commercial rooftops. It has a very high layout efficiency and can help designers quickly complete the layout design of photovoltaic arrays.

[0166] Among them, the software based on the Unity3D engine can visually present the layout of the photovoltaic power station, the installation positions of components, etc. in three dimensions. Through realistic 3D models, customers can intuitively feel the completed effect of the project and achieve the efficient design of the photovoltaic array layout.

[0167] Preferably, the parts related to mechanical movement in this embodiment can be completed by conventional devices such as motors and manipulators in the prior art. The models and detailed structures of conventional devices such as motors and manipulators are all for conventional applications, and the models and detailed structures of the above-mentioned mechanical equipment will not be elaborated in this embodiment.

[0168] In this embodiment, the initial service length of the upper chord is adjusted several times within the maximum allowable tensile stress range of the upper chord by a preset adjustment length. Based on each adjustment, the real-time tilt angle of each photovoltaic panel, the real-time service length of the upper chord, and the real-time tensile stress of the upper chord are obtained once. The initial service length of the lower chord is adjusted several times within the maximum allowable tensile stress range of the lower chord by a preset adjustment length. Based on each adjustment, the real-time tilt angle of each photovoltaic panel, the real-time service length of the lower chord, and the real-time tensile stress of the lower chord are obtained once. The mutual relationships between all the real-time tilt angles and the real-time service lengths of all the upper chords, the real-time tensile stresses of all the upper chords, the real-time service lengths of all the lower chords, and the real-time tensile stresses of all the lower chords are analyzed through multiple linear regression to obtain the relationship formula between the tilt angle and the chord length. All the maximum values of the solar radiation distribution in the preset area and the minimum covering circle of all the maximum values are obtained. A length interval from zero to the radius length is defined based on the radius length of the minimum covering circle. The maximum tilt angle of each photovoltaic panel is obtained based on the relationship formula between the tilt angle and the chord length, and an angle interval from zero degree to the maximum tilt angle is defined. The horizontal distance between the flexible photovoltaic support and the center of the minimum covering circle and the data position corresponding to the length interval of the horizontal distance are obtained. The same data position in the angle interval is obtained based on the data position, which is the optimal tilt angle of the flexible photovoltaic support. The optimal tilt angle is substituted into the relationship formula between the tilt angle and the chord length to obtain the optimal service length of the upper chord and the optimal service length of the lower chord. This embodiment utilizes the characteristic that the tilt angle of the photovoltaic panel of the flexible photovoltaic support can be adjusted by retracting and releasing the upper and lower chords. By analyzing the linear relationship between the lengths of the upper and lower chords of the flexible photovoltaic support and the tilt angle of the photovoltaic panel, the relationship between the retracting and releasing length change behavior and the tilt angle change behavior is clarified, providing a quantitative basis for adjusting the tilt angle according to the solar radiation distribution in the future. Then, the solar high-radiation habitual area is defined based on the extreme value distribution in the solar radiation distribution. Finally, the tilt angle is adjusted according to the distance between the photovoltaic panel and the center of the solar high-radiation habitual area, realizing that the farther the photovoltaic panel is from the radiation center, the larger the tilt angle, so that the panel of the photovoltaic panel can face the radiation center with a larger area, thereby improving the light receiving efficiency. Compared with the manual subjective experience setting in the prior art, this embodiment provides a tilt angle adjustment method with a unique standard, quantifiable, and relatively accurate, which does not require manual participation throughout the process and avoids the tilt angle adjustment error caused by the previous manual subjective experience.

[0169] As Figure 2 shown, this embodiment provides an embodiment of the tilt angle adjustment device for the flexible photovoltaic support. In this embodiment, the tilt angle adjustment device is applied to the tilt angle adjustment method in the above-mentioned embodiment.

[0170] Specifically, the tilt angle adjustment device includes a top chord parameter acquisition module 1, a bottom chord parameter acquisition module 2, a tilt angle and chord analysis module 3, a solar radiation extreme value delineation module 4, a length interval definition module 5, an angle interval definition module 6, a horizontal distance data position acquisition module 7, a data position tilt angle matching module 8, and a chord optimal use length calculation module 9 that are electrically connected in sequence.

[0171] Among them, the top chord parameter acquisition module 1 is used to adjust the initial use length of the top chord several times within the maximum allowable tensile stress range of the top chord with a preset adjustment length, and obtain the real-time tilt angle of each photovoltaic panel, the real-time use length of the top chord, and the real-time tensile stress of the top chord once for each adjustment; the bottom chord parameter acquisition module 2 is used to adjust the initial use length of the bottom chord several times within the maximum allowable tensile stress range of the bottom chord with a preset adjustment length, and obtain the real-time tilt angle of each photovoltaic panel, the real-time use length of the bottom chord, and the real-time tensile stress of the bottom chord once for each adjustment; the tilt angle and chord analysis module 3 is used to analyze the mutual relationships between all real-time tilt angles and the real-time use lengths of all top chords, the real-time tensile stresses of all top chords, the real-time use lengths of all bottom chords, and the real-time tensile stresses of all bottom chords through multiple linear regression to obtain the tilt angle and chord length relationship formula; the solar radiation extreme value delineation module 4 is used to obtain all the maximum values of the solar radiation distribution in a preset area and the minimum covering circle of all the maximum values; the length interval definition module 5 is used to define a length interval from zero to the radius length based on the radius length of the minimum covering circle; the angle interval definition module 6 is used to obtain the maximum tilt angle of each photovoltaic panel based on the tilt angle and chord length relationship formula and define an angle interval from zero degree to the maximum tilt angle; the horizontal distance data position acquisition module 7 is used to obtain the horizontal distance between the flexible photovoltaic support and the center of the minimum covering circle and the data position corresponding to the horizontal distance in the length interval; the data position tilt angle matching module 8 is used to obtain the same data position in the angle interval based on the data position, which is the optimal tilt angle of the flexible photovoltaic support; the chord optimal use length calculation module 9 is used to substitute the optimal tilt angle into the tilt angle and chord length relationship formula to obtain the optimal use lengths of the top chord and the bottom chord.

[0172] Furthermore, the tilt angle adjustment device further includes a top chord midpoint position maintaining module, a top chord retracting and releasing module, a bottom chord midpoint position maintaining module, and a bottom chord retracting and releasing module that are electrically connected in sequence; the top chord midpoint position maintaining module is electrically connected to the chord optimal use length calculation module 9.

[0173] Among them, the upper chord cable midpoint position maintaining module is used to keep the midpoint position of the upper chord cable stationary based on the relative positions of the two steel beam frames; the upper chord cable retracting and releasing module is used to simultaneously relax or tighten the upper chord cable within the maximum allowable tensile stress range of the upper chord cable based on the two steel beam frames through an external pulling member, so as to achieve the optimal service length of the upper chord cable; the lower chord cable midpoint position maintaining module is used to keep the midpoint position of the lower chord cable stationary based on the relative positions of the two steel beam frames; the lower chord cable retracting and releasing module is used to simultaneously relax or tighten the lower chord cable within the maximum allowable tensile stress range of the lower chord cable based on the two steel beam frames through an external pulling member, so as to achieve the optimal service length of the lower chord cable.

[0174] Further, the inclination angle and chord cable analysis module 3 specifically includes a first inclination angle and chord cable analysis sub-module, a second inclination angle and chord cable analysis sub-module, a third inclination angle and chord cable analysis sub-module, a fourth inclination angle and chord cable analysis sub-module, a fifth inclination angle and chord cable analysis sub-module, and a sixth inclination angle and chord cable analysis sub-module that are electrically connected in sequence; the first inclination angle and chord cable analysis sub-module is electrically connected to the lower chord cable parameter acquisition module 2, and the sixth inclination angle and chord cable analysis sub-module is electrically connected to the solar radiation extreme value delineation module 4.

[0175] Among them, the first inclination angle and chord cable analysis sub-module is used to perform normalization processing on all real-time inclination angles, all real-time service lengths of the upper chord cables, all real-time tensile stresses of the upper chord cables, all real-time service lengths of the lower chord cables, and all real-time tensile stresses of the lower chord cables; the second inclination angle and chord cable analysis sub-module is used to define the current real-time inclination angle as a dependent variable; the third inclination angle and chord cable analysis sub-module is used to define the real-time service length of the upper chord cable corresponding to the current real-time inclination angle, the real-time tensile stress of the upper chord cable, the real-time service length of the lower chord cable, and the real-time tensile stress of the lower chord cable as a set of independent variables; the fourth inclination angle and chord cable analysis sub-module is used to define the linear regression relationship between the current dependent variable and all current independent variables through multiple linear regression; the fifth inclination angle and chord cable analysis sub-module is used to solve all linear regression coefficients of the multiple linear regression model; the sixth inclination angle and chord cable analysis sub-module is used to substitute all the solved regression coefficients into all the linear regression relationships to obtain the relationship between the inclination angle and the chord length.

[0176] Further, the solar radiation extreme value delineation module 4 specifically includes a first solar radiation extreme value delineation sub-module, a second solar radiation extreme value delineation sub-module, a third solar radiation extreme value delineation sub-module, a fourth solar radiation extreme value delineation sub-module, a fifth solar radiation extreme value delineation sub-module, a sixth solar radiation extreme value delineation sub-module, a seventh solar radiation extreme value delineation sub-module, an eighth solar radiation extreme value delineation sub-module, and a ninth solar radiation extreme value delineation sub-module that are electrically connected in sequence; the first solar radiation extreme value delineation sub-module is electrically connected to the sixth inclination angle and chord cable analysis sub-module, and the ninth solar radiation extreme value delineation sub-module is electrically connected to the length interval definition module 5.

[0177] Among them, the first solar radiation extreme circle stator module is used to obtain all the maximum values of the solar radiation distribution in a preset area; the second solar radiation extreme circle stator module is used to obtain the elevation coordinates corresponding to each maximum value respectively and integrate all the elevation coordinates into a coordinate data set U = (P 1 , P 2 , …, P k , …, P m ), where P k is the k-th elevation coordinate and m is the number of all elevation coordinates; the third solar radiation extreme circle stator module is used to obtain the abscissas of all elevation coordinates and integrate them into an abscissa data set Ux = (P 1x , P 2x , …, P kx , …, P mx ), where P kx is the abscissa of the k-th elevation coordinate; the fourth solar radiation extreme circle stator module is used to calculate the expected value μ x and the standard deviation σ x of each abscissa based on the abscissa data set; the fifth solar radiation extreme circle stator module is used to integrate the ordinates of all elevation coordinates into an ordinate data set Uy = (P 1y , P 2y , …, P ky , …, P my ), where P ky is the ordinate of the k-th elevation coordinate; the sixth solar radiation extreme circle stator module is used to calculate the expected value μ y and the standard deviation σ y of each ordinate based on the ordinate data set; the seventh solar radiation extreme circle stator module is used to determine that P and are satisfied, then determine that P k is a valid elevation coordinate; the eighth solar radiation extreme circle stator module is used to determine that P or are satisfied, then determine that P k is an outlier; the ninth solar radiation extreme circle stator module is used to obtain the minimum covering circle of all valid elevation coordinates and substitute it into the length interval definition module 5.

[0178] Further, the first solar radiation extreme circle stator module specifically includes a solar radiation distribution acquisition unit and a solar radiation maximum value distribution acquisition unit that are electrically connected in sequence; the solar radiation distribution acquisition unit is electrically connected to the sixth inclination angle and cable parsing sub-module, and the solar radiation maximum value distribution acquisition unit is electrically connected to the second solar radiation extreme circle stator module.

[0179] Among them, the solar radiation distribution acquisition unit is used to acquire the solar radiation distribution through one of downloading from public channels and instrument measurement; the solar radiation maximum value distribution acquisition unit is used to acquire all maximum values of the solar radiation distribution greater than or equal to the preset intensity threshold.

[0180] Further, the ninth solar radiation extreme value circle stator module specifically includes a first solar radiation extreme value circle defining unit, a second solar radiation extreme value circle defining unit, a third solar radiation extreme value circle defining unit, a fourth solar radiation extreme value circle defining unit, a fifth solar radiation extreme value circle defining unit, a sixth solar radiation extreme value circle defining unit, a seventh solar radiation extreme value circle defining unit, an eighth solar radiation extreme value circle defining unit, and a ninth solar radiation extreme value circle defining unit that are electrically connected in sequence; the first solar radiation extreme value circle defining unit is electrically connected to the eighth solar radiation extreme value circle stator module, and the ninth solar radiation extreme value circle defining unit is electrically connected to the length interval definition module 5.

[0181] Among them, the first solar radiation extreme value circle defining unit is used to generate a plane rectangular coordinate system based on an arbitrary horizontal plane, and vertically project all valid elevation coordinates onto the plane rectangular coordinate system to form several projection coordinate points; the second solar radiation extreme value circle defining unit is used to obtain any two coordinate points p 1 and p 2 , and obtain an initial circle C 1 p 2 with the line segment p 2 p 2 as the diameter, where the subscript 2 of the initial circle C i represents the number of projection coordinate points inside the initial circle; the third solar radiation extreme value circle defining unit is used to sequentially traverse each projection coordinate point and determine whether the i-th projection coordinate point p i-1 is located in the first iteration circle C i ; the fourth solar radiation extreme value circle defining unit is used to, if the i-th projection coordinate point p i-1 is not located in the first iteration circle C 1 p i as the diameter to obtain a second iteration circle C i ; the fifth solar radiation extreme value circle defining unit is used to determine whether the j-th projection coordinate point p j is located in the second iteration circle C i , where j < i; the sixth solar radiation extreme value circle defining unit is used to, if the j-th projection coordinate point p j is not located in the second iteration circle C i , then use the line segment p 1 p j as the diameter to obtain a third iteration circle C j ; the seventh solar radiation extreme value circle defining unit is used to determine whether the k-th projection coordinate point p k is located in the third iteration circle Cj inside, where k < j < i; the eighth solar radiation extreme value delimiting unit is used to, if the k-th projected coordinate point p k is not located inside the third iteration circle C j inside, then connect p i , p j , p k to form a triangle, and obtain the circumcircle of the triangle, and the circumcircle is the minimum covering circle of all valid elevation coordinates; the ninth solar radiation extreme value delimiting unit is used to substitute the minimum covering circle of all valid elevation coordinates into step S5.

[0182] Furthermore, the tilt angle adjusting device further includes a visual digital model generating module, a parameter marking module, and a marked visual digital model sending module that are electrically connected in sequence; the visual digital model generating module is electrically connected to the optimal chord length calculation module 9.

[0183] Among them, the visual digital model generating module is used to generate a visual digital model based on a preset area and a flexible photovoltaic support; the parameter marking module is used to mark the optimal use length of the upper chord, the optimal use length of the lower chord, and the optimal tilt angle at positions adjacent to the flexible photovoltaic support in the visual digital model to form a marked visual digital model; the marked visual digital model sending module is used to send the marked visual digital model to an external visual monitoring terminal.

[0184] It should be noted that this embodiment is a functional module item embodiment based on the above method embodiment. For additional content such as the preference, expansion, limitation, and illustration of this embodiment, please refer to the above method embodiment, and this embodiment will not be elaborated here.

[0185] In this embodiment, the initial service length of the upper chord is adjusted several times within the maximum allowable tensile stress range of the upper chord by a preset adjustment length, and each time an adjustment is made, the real-time tilt angle of each photovoltaic panel, the real-time service length of the upper chord, and the real-time tensile stress of the upper chord are obtained once; the initial service length of the lower chord is adjusted several times within the maximum allowable tensile stress range of the lower chord by a preset adjustment length, and each time an adjustment is made, the real-time tilt angle of each photovoltaic panel, the real-time service length of the lower chord, and the real-time tensile stress of the lower chord are obtained once; the mutual relationships between all the real-time tilt angles and the real-time service lengths of all the upper chords, the real-time tensile stresses of all the upper chords, the real-time service lengths of all the lower chords, and the real-time tensile stresses of all the lower chords are analyzed through multiple linear regression to obtain the relationship formula between the tilt angle and the chord length; all the maximum values of the solar radiation distribution in the preset area are obtained, as well as the minimum covering circle of all the maximum values; a length interval from zero to the radius length is defined based on the radius length of the minimum covering circle; the maximum tilt angle of each photovoltaic panel is obtained based on the relationship formula between the tilt angle and the chord length, and an angle interval from zero degree to the maximum tilt angle is defined; the horizontal distance between the flexible photovoltaic support and the center of the minimum covering circle is obtained, as well as the data position in the length interval corresponding to the horizontal distance; the same data position in the angle interval is obtained based on the data position, which is the optimal tilt angle of the flexible photovoltaic support; the optimal tilt angle is substituted into the relationship formula between the tilt angle and the chord length to obtain the optimal service length of the upper chord and the optimal service length of the lower chord. This embodiment utilizes the characteristic that the tilt angle of the photovoltaic panel of the flexible photovoltaic support can be adjusted by retracting and releasing the upper and lower chords. By analyzing the linear relationship between the lengths of the upper and lower chords of the flexible photovoltaic support and the tilt angle of the photovoltaic panel, the relationship between the retracting and releasing length change behavior and the tilt angle change behavior is clarified, providing a quantitative basis for adjusting the tilt angle according to the solar radiation distribution in the future. Then, the solar high-radiation habitual area is defined according to the extreme value distribution in the solar radiation distribution. Finally, the tilt angle is adjusted according to the distance between the photovoltaic panel and the center of the solar high-radiation habitual area, so that the farther the photovoltaic panel is from the radiation center, the larger the tilt angle, enabling the panel surface of the photovoltaic panel to face the radiation center with a larger area, thereby improving the light receiving efficiency. Compared with the manual subjective experience setting in the prior art, this embodiment provides a tilt angle adjustment method that is unique in standard, quantifiable, and relatively accurate, and does not require manual participation throughout the process, avoiding the tilt angle adjustment error caused by the previous manual subjective experience.

[0186] As Figure 3 shown, an embodiment of an electronic device is provided in this embodiment. In this embodiment, the electronic device 10 includes a processor 101 and a memory 102 coupled to the processor 101.

[0187] The memory 102 stores program instructions for implementing the tilt angle adjustment method of the flexible photovoltaic support in any of the above embodiments.

[0188] The processor 101 is used to execute the program instructions stored in the memory 102 for adjusting the tilt angle of the flexible photovoltaic bracket.

[0189] Among them, the processor 101 can also be referred to as a CPU (Central Processing Unit). The processor 101 may be an integrated circuit chip with data processing capabilities. The processor 101 can also be a general-purpose processor, a digital data processor (DSP), an application-specific integrated circuit (ASIC), a field-programmable gate array (FPGA), or other programmable logic devices, discrete gate or transistor logic devices, discrete hardware components. The general-purpose processor can be a microprocessor or the processor can also be any conventional processor, etc.

[0190] Furthermore, Figure 4 It is a schematic structural diagram of a storage medium according to an embodiment of the present application. The storage medium 11 of the embodiment of the present application stores program instructions 111 that can implement all the above methods. Among them, the program instructions 111 can be stored in the above storage medium in the form of a software product, including several instructions for causing a computer device (which can be a personal computer, a server, or a network device, etc.) or a processor to execute all or part of the steps of the methods described in various embodiments of the present application. The foregoing storage medium includes: various media that can store program codes such as USB flash drives, mobile hard disks, read-only memories (ROM, Read-Only Memory), random access memories (RAM, Random Access Memory), magnetic disks, or optical discs, or terminal devices such as computers, servers, mobile phones, and tablets.

[0191] In several embodiments provided by the present application, it should be understood that the disclosed systems, devices, and methods can be implemented in other ways. For example, the device embodiments described above are merely illustrative. For example, the division of units is only a logical function division. In actual implementation, there may be other division methods. For example, multiple units or components can be combined or integrated into another system, or some features can be ignored or not executed. Another point is that the displayed or discussed couplings or direct couplings or communication connections to each other can be through some interfaces, and the indirect couplings or communication connections of devices or units can be in electrical, mechanical, or other forms.

[0192] In addition, in each embodiment of the present application, each functional unit can be integrated in a processing unit, or each unit can exist physically alone, or two or more units can be integrated in one unit. The above-mentioned integrated unit can be implemented in the form of hardware or in the form of a software functional unit. The above is only the implementation manner of the present application, and does not limit the patent scope of the present application. Any equivalent structure or equivalent process transformation made by using the content of the specification and drawings of the present application, or directly or indirectly applied in other related technical fields, shall be included in the patent protection scope of the present application by the same token.

[0193] The specific implementation manners of the present application have been described in detail above, but they are only examples, and the present application is not limited to the specific implementation manners described above. For those skilled in the art, any equivalent modification or substitution to the present application is also within the scope of the present application. Therefore, all equivalent transformations, modifications, improvements, etc. made without departing from the spirit and principle of the present application should be covered by the scope of the present application.

Claims

1. A method for adjusting the tilt angle of a flexible photovoltaic support, wherein the method is applied to a flexible photovoltaic support arranged in a preset area, wherein the flexible photovoltaic support comprises two steel beams fixed to the ground, an upper chord and a lower chord arranged between the two steel beams, and a plurality of photovoltaic panels installed on the upper chord and the lower chord, wherein: The tilt angle adjustment method comprises: Step S1, adjusting the initial use length of the upper chord several times with a preset adjustment length within the maximum allowable tensile stress range of the upper chord, and obtaining the real-time inclination angle of each photovoltaic panel, the real-time use length of the upper chord, and the real-time tensile stress of the upper chord based on each adjustment; Step S2, adjusting the initial use length of the lower chord several times with the preset adjustment length within the maximum allowable tensile stress range of the lower chord, and obtaining the real-time inclination angle of each photovoltaic panel, the real-time use length of the lower chord, and the real-time tensile stress of the lower chord based on each adjustment; Step S3, analyzing the relationship between all real-time inclination angles and the real-time service lengths of all upper chords, the real-time tensile stresses of all upper chords, the real-time service lengths of all lower chords, and the real-time tensile stresses of all lower chords by multivariate linear regression, and obtaining a relationship between the inclination angle and the chord length; Step S4, obtaining all maximum values ​​of the solar radiation distribution in the preset area and the minimum coverage circle of all the maximum values; Step S5, defining a length interval from zero to the radius length based on the radius length of the minimum covering circle; Step S6, obtaining the maximum tilt angle of each photovoltaic panel based on the relationship between the tilt angle and the chord length, and defining an angle interval from zero degrees to the maximum tilt angle; Step S7, obtaining a horizontal distance between the flexible photovoltaic support and the center of the minimum coverage circle, and a data position of the length interval corresponding to the horizontal distance; Step S8, obtaining the same data position in the angle interval based on the data position as the optimal tilt angle of the flexible photovoltaic bracket; Step S9, substituting the optimal inclination angle into the inclination angle and chord length relationship formula to obtain the optimal use length of the upper chord and the optimal use length of the lower chord.

2. The tilt angle adjustment method according to claim 1, characterized in that: Step S9, substituting the optimal inclination angle into the inclination angle and chord length relationship formula to obtain the optimal use length of the upper chord and the optimal use length of the lower chord, and then comprising: Step S10, keeping the midpoint of the upper chord still based on the relative positions of the two steel beam frames; Step S20, based on two steel beam frames, simultaneously loosening or tightening the upper chord within the maximum allowable tensile stress range of the upper chord through an external pulling member, so as to achieve an optimal use length of the upper chord; Step S30, keeping the midpoint of the lower chord stationary based on the relative positions of the two steel beam frames; Step S40, based on the two steel beam frames, the lower chord is simultaneously loosened or tightened through the external pulling member within the maximum allowable tensile stress orientation of the lower chord, so as to achieve the optimal use length of the lower chord.

3. The tilt angle adjustment method according to claim 1, characterized in that: Step S3, by means of multiple linear regression, the relationships between all real-time inclination angles and the real-time service lengths of all upper chords, the real-time tensile stresses of all upper chords, the real-time service lengths of all lower chords, and the real-time tensile stresses of all lower chords are analyzed to obtain a relationship between the inclination angle and the chord length, including: Step S31, normalizing all real-time inclination angles, real-time use lengths of all upper chords, real-time tensile stresses of all upper chords, real-time use lengths of all lower chords, and real-time tensile stresses of all lower chords; Step S32, defining the current real-time tilt angle as a dependent variable; Step S33, defining the real-time use length of the upper chord, the real-time tensile stress of the upper chord, the real-time use length of the lower chord, and the real-time tensile stress of the lower chord corresponding to the current real-time inclination angle as a set of independent variables; Step S34, defining the linear regression relationship between the current dependent variable and all current independent variables through multiple linear regression; Step S35, solving all linear regression coefficients of the multivariate linear regression model; Step S36, substituting all the regression coefficients obtained by solving into all the linear regression relationships to obtain the relationship between the inclination angle and the chord length.

4. The tilt angle adjustment method according to claim 1, characterized in that: Step S4, obtaining all maximum values ​​of the solar radiation distribution in the preset area and the minimum coverage circle of all maximum values, including: Step S41, obtaining all maximum values ​​of solar radiation distribution in the preset area; Step S42, respectively obtain the elevation coordinates corresponding to each maximum value and integrate all elevation coordinates into a coordinate data set U = (P1, P2, ..., P k ,…,P m ), where P k is the kth elevation coordinate, and m is the number of all elevation coordinates; Step S43, obtain the horizontal coordinates of all elevation coordinates and integrate them into a horizontal coordinate data set Ux=(P 1x ,P 2x ,…,P kx ,…,P mx ), where P kx is the horizontal coordinate of the kth elevation coordinate; Step S44, calculating the expected value μ of each horizontal coordinate based on the horizontal coordinate data set x and standard deviation σ x ; Step S45, integrating the ordinates of all elevation coordinates into a ordinate data set Uy=(P1y, P2y, ..., Pky, ..., Pmy), where Pky is the ordinate of the k-th elevation coordinate; Step S46, calculating the expected value μ of each ordinate based on the ordinate data set y and standard deviation σ y ; Step S47, when and When P k is the effective elevation coordinate; Step S48, when or When P k is an outlier; Step S49, obtain the minimum covering circle of all valid elevation coordinates and substitute it into step S5.

5. The tilt angle adjustment method according to claim 4, characterized in that: Step S41, obtaining all maximum values ​​of the solar radiation distribution in the preset area, including: Step S411, obtaining the solar radiation distribution by downloading from a public channel or measuring with an instrument; Step S412, obtaining all maximum values ​​of the solar radiation distribution that are greater than or equal to a preset intensity threshold.

6. The tilt angle adjustment method according to claim 4, characterized in that: Step S49, obtaining the minimum covering circle of all valid elevation coordinates and substituting it into step S5, includes: Step S491, generating a plane rectangular coordinate system based on an arbitrary horizontal plane, and vertically projecting all valid elevation coordinates to the plane rectangular coordinate system to form a plurality of projection coordinate points; Step S492, obtaining any two coordinate points p1 and p2 from all the projected coordinate points, and obtaining an initial circle C2 with the line segment p1p2 as the diameter, wherein the subscript 2 of the initial circle C2 represents the number of projected coordinate points within the initial circle; Step S493, traverse each projection coordinate point in turn, and determine the i-th projection coordinate point p i Is it located in the first iteration circle C? i-1 , if the i-th projection coordinate point p i There is no circle C located in the first iteration i-1 If the value is within , then execute step S494; Step S494, using line segment p1p i The diameter of the second iteration circle C is obtained i ; Step S495, determine whether the j-th projected coordinate point p j is located within the second iteration circle C i , where j < i. If the j-th projected coordinate point p j is not located within the second iteration circle C i , then execute step S496; Step S496, using line segment p1p j The diameter of the third iteration circle C is obtained j ; Step S497, determine whether the k-th projected coordinate point p k is located within the third iteration circle C j , where k < j < i. If the k-th projected coordinate point p k is not located within the third iteration circle C j , then execute step S498; Step S498, connect p i 、p j 、p k A triangle is formed, and a circumscribed circle of the triangle is obtained, where the circumscribed circle is the minimum covering circle of all valid elevation coordinates; Step S499, substitute the minimum covering circle of all valid elevation coordinates into step S5.

7. The tilt angle adjustment method according to claim 1, characterized in that: Step S9, substituting the optimal inclination angle into the inclination angle and chord length relationship formula to obtain the optimal use length of the upper chord and the optimal use length of the lower chord, and then comprising: Step S100, generating a visual digital model based on the preset area and the flexible photovoltaic support; Step S200, marking the optimal use length of the upper chord, the optimal use length of the lower chord, and the optimal inclination angle at a position adjacent to the flexible photovoltaic support in the visualized digital model to form a visualized digital model with markings; Step S300: sending the marked visualized digital model to an external visualized monitoring terminal.

8. A tilt angle adjustment device for a flexible photovoltaic support, the tilt angle adjustment device being applied to the tilt angle adjustment method according to any one of claims 1 to 7, characterized in that: The tilt angle adjustment device comprises: An upper chord parameter acquisition module is used to adjust the initial use length of the upper chord several times with a preset adjustment length within the maximum allowable tensile stress range of the upper chord, and acquire the real-time inclination angle of each photovoltaic panel, the real-time use length of the upper chord, and the real-time tensile stress of the upper chord based on each adjustment; A lower chord parameter acquisition module, used to adjust the initial use length of the lower chord several times with the preset adjustment length within the maximum allowable tensile stress range of the lower chord, and acquire the real-time inclination angle of each photovoltaic panel, the real-time use length of the lower chord, and the real-time tensile stress of the lower chord based on each adjustment; The module for analyzing the inclination angle and the chord is used to analyze the relationship between all the real-time inclination angles and the real-time service length of all the upper chords, the real-time tensile stress of all the upper chords, the real-time service length of all the lower chords, and the real-time tensile stress of all the lower chords through multiple linear regression to obtain the relationship between the inclination angle and the chord length; A solar radiation extreme value delineation module is used to obtain all the maximum values ​​of the solar radiation distribution in the preset area and the minimum coverage circle of all the maximum values; A length interval definition module, used to define a length interval from zero to the radius length based on the radius length of the minimum covering circle; An angle interval definition module, used to obtain the maximum tilt angle of each photovoltaic panel based on the relationship between the tilt angle and the chord length, and define an angle interval from zero degrees to the maximum tilt angle; A horizontal distance data position acquisition module is used to acquire the horizontal distance between the flexible photovoltaic support and the center of the minimum coverage circle, and the data position of the length interval corresponding to the horizontal distance; A data position tilt angle matching module, used for obtaining the same data position in the angle interval based on the data position as the optimal tilt angle of the flexible photovoltaic support; The optimal use length calculation module of the chord is used to substitute the optimal inclination angle into the relationship between the inclination angle and the chord length to obtain the optimal use length of the upper chord and the optimal use length of the lower chord.

9. An electronic device, characterized in that: It comprises a processor and a memory coupled to the processor, wherein the memory stores program instructions executable by the processor; when the processor executes the program instructions stored in the memory, the tilt angle adjustment method as described in any one of claims 1 to 7 is implemented.

10. A storage medium, characterized in that: The storage medium stores program instructions, and when the program instructions are executed by the processor, the tilt angle adjustment method according to any one of claims 1 to 7 can be implemented.

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