Single-layer cable system photovoltaic flexible support total-station deflection early warning method and system

Abstract

The invention relates to the technical field of deflection early warning of photovoltaic flexible supports, in particular to a whole-station deflection early warning method and system for a single-layer cable system photovoltaic flexible support, and the method comprises the steps: obtaining the initial horizontal tension of a cable according to the initial deflection; the combined load of the cable at each moment is obtained; iteration is carried out until convergence, and the horizontal tension of the cable at each moment is obtained; the deflection of the combined load of the photovoltaic flexible support at each moment is obtained; linear fitting is carried out according to the actually measured deflection and the deflection of the photovoltaic flexible support combined load, and a fitting linear equation is obtained; obtaining the combined load deflection at each subsequent moment; and inputting the combined load deflection at each subsequent moment into a fitting linear equation to predict and obtain the total-station deflection of the single-layer cable system photovoltaic flexible bracket, and performing total-station deflection early warning on the single-layer cable system photovoltaic flexible bracket according to the total-station deflection of the single-layer cable system photovoltaic flexible bracket and a preset deflection early warning threshold value. According to the invention, the accuracy of deflection early warning is improved.

Description

Technical Field

[0001] The present invention relates to the technical field of photovoltaic flexible support deflection warning technology, and in particular to a method and system for warning the entire station deflection of a single-layer cable-type photovoltaic flexible support. Background Art

[0002] Existing deflection warning methods are mainly divided into two categories: manual measurement warning and intelligent sensor real-time monitoring warning. The manual measurement method relies on tools such as laser rangefinders, levels and optical projectors to evaluate structural deflection through field measurement and data calculation and analysis, and issue a warning when the threshold is exceeded. However, this method has a complex measurement process, cumbersome data processing, prone to errors, and cannot achieve real-time warning. Another real-time monitoring method based on intelligent sensors can provide online warnings, but due to the limited number of measurement points, it can only monitor some points and cannot cover the deflection of all flexible supports in the entire station. More importantly, both methods are based only on current monitoring data and fail to combine predicted wind speed information. Therefore, they cannot provide early warnings under extreme weather conditions, and have obvious limitations. Summary of the Invention

[0003] The present invention provides a method and system for early warning the deflection of a single-layer cable-type photovoltaic flexible support, which solves the limitations of existing deflection early warning methods in terms of measurement accuracy, real-time performance and response to extreme weather.

[0004] The purpose of the present invention can be achieved through the following technical solutions: The first aspect of the present invention is to provide a method for early warning of the deflection of a single-layer cable-type photovoltaic flexible support, comprising: Obtaining the intrinsic parameter data and real-time dynamic data of all flexible supports in the photovoltaic power station; the intrinsic parameter data includes the longitude and latitude of the span, the elevation difference of the supports, the span spacing, the deadweight of the module, the length of the module, the deadweight of the cable, the length of the cable, the elastic modulus of the cable, and the cross-sectional area of ​​the cable; the real-time dynamic data includes wind speed, wind direction, snow load, and measured deflection; Obtain the initial deflection; based on the initial deflection, obtain the initial horizontal tension of the cable through the calculation formula of the initial deflection of the photovoltaic flexible support; obtain the combined load of the cable at each moment through the cable self-weight load, component self-weight load, wind load and snow load; according to the combined load at each moment, the cable self-weight load and the initial horizontal tension of the cable, the cable elastic modulus, the cable cross-sectional area, and the span spacing are iterated until convergence, and the horizontal tension of the cable at each moment is obtained; according to the combined load of the cable at each moment, the span spacing, the horizontal tension of the cable at each moment and the support elevation difference, the deflection of the combined load of the photovoltaic flexible support at each moment is obtained; Continuously obtain the measured deflection at several moments, and perform linear fitting on the relationship between the deflection of the combined load of the photovoltaic flexible bracket at several moments to obtain the fitted linear equation; predict the wind direction and wind speed at each subsequent moment, and obtain the combined load of the cable at each subsequent moment; obtain the combined load deflection at each subsequent moment based on the combined load of the cable; input the combined load deflection at each subsequent moment into the fitted linear equation to predict the full-station deflection of the single-layer cable-based photovoltaic flexible bracket, and perform a full-station deflection warning of the single-layer cable-based photovoltaic flexible bracket based on the full-station deflection of the single-layer cable-based photovoltaic flexible bracket and a preset deflection warning threshold.

[0005] Furthermore, the initial deflection is obtained; according to the initial deflection, the initial horizontal tension of the cable is obtained by using a calculation formula of the initial deflection of the photovoltaic flexible support, including: The initial deflection is obtained by obtaining the measured deflection;

[0006] Where, represents the initial horizontal tension of the cable, represents the cable's own weight load, is the span spacing, Indicates the support elevation difference, Indicates the initial deflection of the photovoltaic flexible support; The cable deadweight load is obtained by the ratio between the cable deadweight and the cable length.

[0007] Furthermore, the combined load of the cable at each moment is obtained through the cable self-weight load, the component self-weight load, the wind load, and the snow load; and the horizontal tension of the cable at each moment is obtained by iterating according to the combined load, the cable self-weight load, and the initial horizontal tension of the cable, the cable elastic modulus, the cable cross-sectional area, and the span spacing until convergence, including:

[0008] Where, Indicates the The combined load of the cable at each moment, represents the cable's own weight load, Represents the component's own weight load, Indicates the The wind load at this moment, Indicates the Snow load at each moment; Among them, the component deadweight load is obtained by the ratio between the component deadweight and the component length; The process of obtaining the horizontal tension of the cable at each moment is: The horizontal tension of the first iteration is obtained according to the iterative formula of the horizontal tension at each moment; the difference factor of the first iteration is obtained according to the iterative difference formula based on the horizontal tension of the first iteration and the initial horizontal tension. When the difference factor of the first iteration is less than or equal to the preset iteration threshold, the iteration is stopped and the horizontal tension of the first iteration is used as the horizontal tension of the cable at each moment; when the difference factor of the first iteration is greater than the preset iteration threshold, the iteration is continued; According to the horizontal tension iteration formula at each moment, the horizontal tension of the second iteration is obtained; according to the horizontal tension of the second iteration and the horizontal tension of the first iteration, the difference factor of the second iteration is obtained by the iterative difference formula; when the difference factor of the second iteration is less than or equal to the preset iteration threshold, the iteration is stopped and the horizontal tension of the second iteration is used as the horizontal tension of the cable at each moment; when the difference factor of the second iteration is greater than the preset iteration threshold, the iteration is continued; And so on, until the iteration stops and the horizontal tension of the cable at each moment is obtained; Among them, the iterative formula of horizontal tension at each moment is specifically expressed as:

[0009] Where, Indicates the The horizontal tension of the cable at the moment The horizontal pull of the iteration, Indicates the The horizontal tension of the cable at the moment The horizontal pull of the iteration, is the span spacing, represents the initial horizontal tension of the cable, represents the cable's own weight load, Indicates the The combined load of the cable at each moment, represents the elastic modulus of the cable, represents the cross-sectional area of ​​the cable; Among them, the iterative difference formula is specifically expressed as:

[0010] Where, Indicates the The horizontal tension of the cable at the moment The horizontal pull of the iteration, Indicates the The horizontal tension of the cable at the moment The horizontal pull of the iteration, Indicates the The horizontal tension of the cable at the moment The difference factor of the iteration, Indicates the absolute value symbol.

[0011] Furthermore, the deflection of the photovoltaic flexible support combined load at each moment is obtained according to the combined load of the cables at each moment, the span spacing, the horizontal tension of the cables at each moment, and the elevation difference of the supports, including:

[0012] Where, Indicates the The horizontal tension of the cable at this moment, Indicates the The combined load of the cable at each moment, is the span spacing, Indicates the support elevation difference, Indicates the The deflection of the photovoltaic flexible support under the combined load at each moment.

[0013] Furthermore, the measured deflections at several moments are continuously obtained, and a linear fitting is performed on the relationship between the deflections of the photovoltaic flexible support combined load at several moments to obtain the fitted linear equation, including: The measured deflections at several moments are continuously obtained to form a set of sequences, which are recorded as measured deflection sequences; through the process of obtaining the combined load deflection at each moment, the combined load deflections at several moments are obtained to form a set of sequences, which are recorded as theoretical deflection sequences; the measured deflection is used as the horizontal axis and the combined load deflection is used as the vertical axis to construct the deflection space; the data of all moments in the measured deflection sequence and the theoretical deflection sequence are mapped in the deflection space to obtain several data points, and a linear fit is performed on the several data points by the least squares method to obtain the coefficients and intercepts in the fitted linear equation; and the fitted linear equation is obtained.

[0014] Furthermore, the wind direction and wind speed at each subsequent moment are predicted, and the combined load of the cables at each subsequent moment is obtained; based on the combined load of the cables at each subsequent moment, the combined load deflection at each subsequent moment is obtained; and the combined load deflection at each subsequent moment is input into the fitting linear equation to predict the full-station deflection of the single-layer cable-based photovoltaic flexible support, including: Based on the mid-span longitude and latitude, as well as wind direction and speed data measured at several previous moments, the wind direction and speed at each subsequent moment are predicted using a mesoscale numerical meteorological forecast model, a fluid dynamics model, and dynamic downscaling. Based on the predicted wind speed and direction, the wind load on the cable at each subsequent moment is obtained using the GB 50009 Code for Loads on Building Structures. The combined load of the cable at each subsequent moment is obtained by adding the cable's own weight load, the component's own weight load, the snow load, and the wind load of the cable at each subsequent moment; the combined load deflection at each subsequent moment is obtained by the deflection of the combined load of the photovoltaic flexible support at each subsequent moment according to the combined load of the cable at each subsequent moment; The combined load-deflection at each subsequent moment is input into the fitting linear equation to predict the actual combined load-deflection at each subsequent moment as the full-station deflection of the single-layer cable-type photovoltaic flexible support.

[0015] Furthermore, the whole-station deflection warning of the single-layer cable-based photovoltaic flexible support is performed according to the whole-station deflection of the single-layer cable-based photovoltaic flexible support and a preset deflection warning threshold, including: The deflection matrix of each span position of all steel cables is obtained through the process of obtaining the deflection of the entire station of the single-layer cable-based photovoltaic flexible support. When the deflection in the deflection matrix of each span position of all steel cables is greater than the preset deflection warning threshold, an early warning is issued.

[0016] The second aspect of the present invention is to provide a single-layer cable-type photovoltaic flexible support full-station deflection warning system, comprising: Data acquisition module: used to obtain the intrinsic parameter data and real-time dynamic data of all flexible supports in the photovoltaic power station; the intrinsic parameter data includes the longitude and latitude of the span, the elevation difference of the supports, the span spacing, the deadweight of the module, the deadweight of the cable, the cable length, the elastic modulus of the cable, and the cross-sectional area of ​​the cable; the real-time dynamic data includes wind speed, wind direction, snow load, and measured deflection; Deflection analysis module: used to obtain the initial deflection; based on the initial deflection, the initial horizontal tension of the cable is obtained through the calculation formula of the initial deflection of the photovoltaic flexible support; the combined load of the cable at each moment is obtained through the cable self-weight load, the component self-weight load, the wind load and the snow load; based on the combined load at each moment, the cable self-weight load and the initial horizontal tension of the cable, the cable elastic modulus, the cable cross-sectional area and the span spacing are iterated until convergence, and the horizontal tension of the cable at each moment is obtained; based on the combined load of the cable at each moment, the span spacing, the horizontal tension of the cable at each moment and the support elevation difference, the deflection of the combined load of the photovoltaic flexible support at each moment is obtained; Early warning module: used to continuously obtain the measured deflection at several moments, and perform linear fitting on the relationship between the deflection of the combined load of the photovoltaic flexible bracket at several moments to obtain the fitted linear equation; predict the wind direction and wind speed at each subsequent moment, and obtain the combined load of the cable at each subsequent moment; obtain the combined load deflection at each subsequent moment based on the combined load of the cable; input the combined load deflection at each subsequent moment into the fitted linear equation to predict the full-station deflection of the single-layer cable-based photovoltaic flexible bracket, and perform a full-station deflection warning of the single-layer cable-based photovoltaic flexible bracket based on the full-station deflection of the single-layer cable-based photovoltaic flexible bracket and the preset deflection warning threshold.

[0017] The third aspect of the present invention is to provide an electronic device, including a memory, a processor, and a computer program stored in the memory and runnable on the processor. When the processor executes the computer program, it implements the method for early warning of the full-station deflection of a single-layer cable-type photovoltaic flexible support.

[0018] The fourth aspect of the present invention is to provide a computer-readable storage medium, which stores a computer program. When the computer program is executed by a processor, it implements the method for early warning of the full-station deflection of a single-layer cable-type photovoltaic flexible support.

[0019] Compared with the prior art, the beneficial effects of the present invention are: obtaining the initial deflection; according to the initial deflection, obtaining the initial horizontal tension of the cable through the calculation formula of the initial deflection of the photovoltaic flexible bracket; obtaining the combined load of the cable at each moment through the cable self-weight load, the component self-weight load, the wind load and the snow load, thereby improving the accuracy of manual measurement; according to the combined load at each moment, the cable self-weight load and the initial horizontal tension of the cable, the cable elastic modulus, the cable cross-sectional area and the span spacing are iterated until convergence, and the horizontal tension of the cable at each moment is obtained, thereby improving the accuracy of horizontal tension analysis; according to the combined load of the cable at each moment, the span spacing, the horizontal tension of the cable at each moment and the support elevation difference, the deflection of the combined load of the photovoltaic flexible bracket at each moment is obtained, thereby improving High accuracy in deflection acquisition; continuously acquiring the measured deflection at several moments, and performing linear fitting on the relationship between the deflection of the combined load of the photovoltaic flexible bracket at several moments to obtain a fitted linear equation; predicting the wind direction and wind speed at each subsequent moment, and obtaining the combined load of the cable at each subsequent moment, thereby improving the accuracy of subsequent prediction analysis; obtaining the combined load deflection at each subsequent moment based on the combined load of the cable; inputting the combined load deflection at each subsequent moment into the fitted linear equation to predict the full-station deflection of the single-layer cable-based photovoltaic flexible bracket, and performing a full-station deflection warning of the single-layer cable-based photovoltaic flexible bracket based on the full-station deflection of the single-layer cable-based photovoltaic flexible bracket and a preset deflection warning threshold, thereby improving the accuracy of early warnings under extreme weather conditions. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0021] Figure 1 The present invention provides a schematic flow chart of the steps of a method for early warning of the deflection of a single-layer cable-type photovoltaic flexible support; Figure 2 The present invention provides a module flow diagram of a full-station deflection warning system for a single-layer cable-type photovoltaic flexible support. DETAILED DESCRIPTION

[0022] In order to enable those skilled in the art to better understand the solutions of the present invention, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts should fall within the scope of protection of the present invention.

[0023] It should be noted that the terms "first", "second", etc. in the description and claims of the present invention and the above-mentioned drawings are used to distinguish similar objects and are not necessarily used to describe a specific order or sequence. It should be understood that the numbers used in this way can be interchanged where appropriate, so that the embodiments of the present invention described herein can be implemented in an order other than those illustrated or described herein. In addition, the terms "including" and "having" and any variations thereof are intended to cover non-exclusive inclusions. For example, a process, method, system, product or device that includes a series of steps or units is not necessarily limited to those steps or units clearly listed, but may include other steps or units that are not clearly listed or inherent to these processes, methods, products or devices.

[0024] Aiming at the problems existing in the background technology, a full-station deflection warning method and system for a single-layer cable-type photovoltaic flexible support was studied and designed, which has important practical significance.

[0025] like Figure 1 As shown, the first aspect of the present invention is to provide a method for early warning of the deflection of a single-layer cable-type photovoltaic flexible support, comprising the following steps: Step S001: The inherent parameter data and real-time dynamic data of all flexible supports of the photovoltaic power station.

[0026] It should be noted that in order to carry out full-station deflection warning for photovoltaic flexible brackets, because in the warning process, the full-station deflection warning calculation is also related to the photovoltaic flexible bracket's own parameter data and dynamic change related data, it is necessary to collect the photovoltaic flexible bracket's own parameter data and real-time dynamic data.

[0027] Specifically, the intrinsic parameter data of all flexible supports in the photovoltaic power station are collected; wherein, the intrinsic parameter data include: mid-span longitude and latitude, support elevation difference, span spacing, module deadweight, module length, cable deadweight, cable length, cable elastic modulus, cable cross-sectional area, etc.; By deploying online monitoring equipment, real-time dynamic data is collected; the real-time dynamic data includes: wind speed, wind direction, snow load, measured deflection, etc. Among them, wind speed and wind direction are collected by wind vanes or ultrasonic wind direction sensors, snow load is collected by weighing snow pressure sensors, and measured deflection is collected by laser displacement sensors.

[0028] Step S002: According to the initial deflection, the initial horizontal tension of the cable is obtained; the combined load of the cable at each moment is obtained through the cable self-weight load, the component self-weight load, the wind load and the snow load; according to the combined load at each moment, the cable self-weight load and the initial horizontal tension of the cable, the cable elastic modulus, the cable cross-sectional area and the span spacing are iterated until convergence to obtain the horizontal tension of the cable at each moment; according to the combined load of the cable at each moment, the span spacing, the horizontal tension of the cable at each moment and the support elevation difference, the deflection of the combined load of the photovoltaic flexible bracket at each moment is obtained.

[0029] The initial deflection of the photovoltaic flexible support is obtained according to the cable's own weight load, span spacing, initial horizontal tension of the cable, and support elevation difference. The initial deflection of the photovoltaic flexible support is specifically expressed by the formula:

[0030] Where, represents the initial horizontal tension of the cable, represents the cable's own weight load, is the span spacing, Indicates the support elevation difference, Indicates the initial deflection of the photovoltaic flexible support.

[0031] The initial deflection is obtained by measuring the deflection, and the initial horizontal tension of the cable is obtained according to the initial deflection and the calculation formula of the initial deflection of the photovoltaic flexible bracket.

[0032] The combined load of the cable at each moment is obtained by the cable self-weight load, component self-weight load, wind load and snow load. The combined load is specifically expressed by the formula:

[0033] Where, Indicates the The combined load of the cable at each moment, represents the cable's own weight load, Represents the component's own weight load, Indicates the The wind load at this moment, Indicates the Snow load at that moment.

[0034] The wind load on the cables at each moment is calculated based on the measured wind speed and direction at each moment using the GB 50009 Code for Loads on Building Structures. The cable deadweight load is calculated as the ratio of the cable deadweight to the cable length, while the component deadweight load is calculated as the ratio of the component deadweight to the component length.

[0035] According to the combined load of the cables at each moment, the span spacing, the horizontal tension of the cables at each moment, and the elevation difference of the supports, the deflection of the combined load of the photovoltaic flexible support at each moment is obtained; the deflection of the combined load of the photovoltaic flexible support at each moment is specifically expressed by the formula:

[0036] Where, Indicates the The horizontal tension of the cable at this moment, Indicates the The combined load of the cable at each moment, is the span spacing, Indicates the support elevation difference, Indicates the The deflection of the photovoltaic flexible support under the combined load at each moment.

[0037] The process of obtaining the horizontal tension of the cable at each moment is: According to the combined load at each moment, the cable's own weight load, the initial horizontal tension of the cable, the cable elastic modulus, the cable cross-sectional area, and the span spacing, it is iterated until convergence. The horizontal tension at the final convergence is used as the horizontal tension of the cable at each moment. The horizontal tension of the first iteration is obtained according to the iterative formula of the horizontal tension at each moment; the difference factor of the first iteration is obtained according to the iterative difference formula based on the horizontal tension of the first iteration and the initial horizontal tension. When the difference factor of the first iteration is less than or equal to the preset iteration threshold, the iteration is stopped and the horizontal tension of the first iteration is used as the horizontal tension of the cable at each moment; when the difference factor of the first iteration is greater than the preset iteration threshold, the iteration is continued; According to the horizontal tension iteration formula at each moment, the horizontal tension of the second iteration is obtained; according to the horizontal tension of the second iteration and the horizontal tension of the first iteration, the difference factor of the second iteration is obtained by the iterative difference formula; when the difference factor of the second iteration is less than or equal to the preset iteration threshold, the iteration is stopped and the horizontal tension of the second iteration is used as the horizontal tension of the cable at each moment; when the difference factor of the second iteration is greater than the preset iteration threshold, the iteration is continued; And so on, until the iteration stops and the horizontal tension of the cable at each moment is obtained.

[0038] Among them, the iterative formula of horizontal tension at each moment is specifically expressed as:

[0039] Where, Indicates the The horizontal tension of the cable at the moment The horizontal pull of the iteration, Indicates the The horizontal tension of the cable at the moment The horizontal pull of the iteration, is the span spacing, represents the initial horizontal tension of the cable, represents the cable's own weight load, Indicates the The combined load of the cable at each moment, represents the elastic modulus of the cable, represents the cross-sectional area of ​​the cable.

[0040] Among them, the iterative difference formula is specifically expressed as:

[0041] Where, Indicates the The horizontal tension of the cable at the moment The horizontal pull of the iteration, Indicates the The horizontal tension of the cable at the moment The horizontal pull of the iteration, Indicates the The horizontal tension of the cable at the moment The difference factor of the iteration, Indicates the absolute value symbol.

[0042] At this point, the deflection of the photovoltaic flexible bracket combined load at each moment is obtained through the above method.

[0043] Step S003: continuously obtain the measured deflection at several moments, and perform linear fitting on the relationship between the deflection of the combined load of the photovoltaic flexible bracket at several moments to obtain the fitted linear equation; predict the wind direction and wind speed at each subsequent moment, and obtain the combined load of the cable at each subsequent moment; obtain the combined load deflection at each subsequent moment based on the combined load of the cable; input the combined load deflection at each subsequent moment into the fitted linear equation to predict the full-station deflection of the single-layer cable-based photovoltaic flexible bracket, and perform a full-station deflection warning of the single-layer cable-based photovoltaic flexible bracket based on the full-station deflection of the single-layer cable-based photovoltaic flexible bracket and a preset deflection warning threshold.

[0044] Continuously obtain the measured deflections at several moments to form a set of sequences, which are recorded as measured deflection sequences; obtain the combined load deflections at several moments through the process of obtaining the combined load deflections at each moment to form a set of sequences, which are recorded as theoretical deflection sequences; construct the deflection space with the measured deflection as the horizontal axis and the combined load deflection as the vertical axis; map the data of all moments in the measured deflection sequence and the theoretical deflection sequence in the deflection space to obtain several data points, perform linear fitting on the several data points using the least squares method, and obtain the coefficients in the fitted linear equation and intercept ; and obtain the equation of the fitted line. The least squares method is a well-known technique and will not be described in detail here.

[0045] Based on the mid-span longitude and latitude and the wind direction and speed data measured at several previous moments, the wind direction and speed at each subsequent moment are predicted through the mesoscale numerical meteorological forecast model, fluid mechanics model and dynamic downscaling; based on the predicted wind speed and direction, the wind load on the cable at each subsequent moment is obtained through the "GB 50009 Code for Loads on Building Structures".

[0046] The combined load of the cable at each subsequent moment is calculated by adding the cable's deadweight, module deadweight, snow load, and wind load at each subsequent moment. The combined load deflection at each subsequent moment is calculated using the combined load deflection of the PV flexible support at each moment. The snow load remains unchanged during the subsequent prediction process and is used based on the standard at the previous moment.

[0047] The combined load-deflection at each subsequent moment is input into the fitting linear equation to predict the actual combined load-deflection at each subsequent moment as the full-station deflection of the single-layer cable-system photovoltaic flexible bracket (this process is the analysis process of the single-layer cable system).

[0048] The deflection matrix of each span position of all steel cables is obtained through the process of obtaining the deflection of the entire station of the single-layer cable-based photovoltaic flexible support. When the deflection in the deflection matrix of each span position of all steel cables is greater than the preset deflection warning threshold, an early warning is issued.

[0049] In this embodiment, the preset deflection warning threshold is 0.35 meters. In this embodiment, the preset deflection warning threshold is not specifically limited, and the implementer can determine it according to the specific situation.

[0050] At this point, the full-station deflection warning of the single-layer cable-type photovoltaic flexible support has been completed.

[0051] like Figure 2 As shown, the second aspect of the present invention is to provide a single-layer cable-type photovoltaic flexible support full-station deflection warning system, including the following modules: Data acquisition module 101: used to obtain the intrinsic parameter data and real-time dynamic data of all flexible supports in the photovoltaic power station; the intrinsic parameter data includes the longitude and latitude of the span, the elevation difference of the support, the span spacing, the deadweight of the module, the deadweight of the module, the deadweight of the cable, the length of the cable, the elastic modulus of the cable, and the cross-sectional area of ​​the cable; the real-time dynamic data includes wind speed, wind direction, snow load, and measured deflection; Deflection analysis module 102: used to obtain the initial deflection; based on the initial deflection, the initial horizontal tension of the cable is obtained using the calculation formula of the initial deflection of the photovoltaic flexible support; the combined load of the cable at each moment is obtained through the cable self-weight load, the component self-weight load, the wind load, and the snow load; based on the combined load at each moment, the cable self-weight load and the initial horizontal tension of the cable, the cable elastic modulus, the cable cross-sectional area, and the span spacing are iterated until convergence, and the horizontal tension of the cable at each moment is obtained; based on the combined load of the cable at each moment, the span spacing, the horizontal tension of the cable at each moment, and the support elevation difference, the deflection of the combined load of the photovoltaic flexible support at each moment is obtained; Early warning module 103: used to continuously obtain the measured deflection at several moments, and perform linear fitting on the relationship between the deflection of the combined load of the photovoltaic flexible support at several moments to obtain the fitted linear equation; predict the wind direction and wind speed at each subsequent moment, and obtain the combined load of the cable at each subsequent moment; obtain the combined load deflection at each subsequent moment based on the combined load of the cable at each subsequent moment; input the combined load deflection at each subsequent moment into the fitted linear equation to predict the full-station deflection of the single-layer cable-based photovoltaic flexible support, and perform a full-station deflection warning of the single-layer cable-based photovoltaic flexible support based on the full-station deflection of the single-layer cable-based photovoltaic flexible support and a preset deflection warning threshold.

[0052] The third aspect of the present invention is to provide an electronic device, including a memory, a processor, and a computer program stored in the memory and runnable on the processor. When the processor executes the computer program, a method for early warning of the full-station deflection of a single-layer cable-type photovoltaic flexible support is implemented.

[0053] The fourth aspect of the present invention is to provide a computer-readable storage medium, which stores a computer program. When the computer program is executed by a processor, a method for early warning of the full-station deflection of a single-layer cable-type photovoltaic flexible support is implemented.

[0054] Those skilled in the art will appreciate that embodiments of the present invention may be provided as methods, systems, or computer program products. Thus, the present invention may take the form of an entirely hardware embodiment, an entirely software embodiment, or an embodiment combining software and hardware aspects. Furthermore, the present invention may take the form of a computer program product implemented on one or more computer-usable storage media (including but not limited to magnetic disk storage, optical storage, etc.) containing computer-usable program code.

[0055] The present invention is described with reference to flowcharts and / or block diagrams of methods, systems, and computer program products according to embodiments of the present invention. It should be understood that each process and / or block in the flowcharts and / or block diagrams, as well as combinations of processes and / or blocks in the flowcharts and / or block diagrams, can be implemented by computer program instructions. These computer program instructions can be provided to a processor of a general-purpose computer, a special-purpose computer, an embedded processor, or other programmable data processing device to produce a machine, so that the instructions executed by the processor of the computer or other programmable data processing device generate instructions for implementing the processes in the flowcharts and / or block diagrams. Figure 1 a process or multiple processes and / or boxes Figure 1 A device that provides the functions specified in a block or multiple blocks.

[0056] These computer program instructions may also be stored in a computer readable memory that can direct a computer or other programmable data processing device to work in a specific manner, so that the instructions stored in the computer readable memory produce an article of manufacture comprising an instruction device, which implements the process Figure 1 a process or multiple processes and / or boxes Figure 1 The function specified in one or more boxes.

[0057] These computer program instructions can also be loaded onto a computer or other programmable data processing device so that a series of operational steps are executed on the computer or other programmable device to produce a computer-implemented process, thereby providing the instructions executed on the computer or other programmable device for implementing the process. Figure 1 a process or multiple processes and / or boxes Figure 1 The steps for the function specified in one or more boxes.

[0058] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention and not to limit it. Although the present invention has been described in detail with reference to the above embodiments, ordinary technicians in the field should understand that the specific implementation methods of the present invention can still be modified or replaced by equivalents. Any modification or equivalent replacement that does not depart from the spirit and scope of the present invention should be covered by the scope of protection of the present invention.

Claims

1. A method for early warning of the deflection of a single-layer cable-type photovoltaic flexible support, characterized in that: include: Obtaining the intrinsic parameter data and real-time dynamic data of all flexible supports in the photovoltaic power station; the intrinsic parameter data includes the longitude and latitude of the span, the elevation difference of the supports, the span spacing, the deadweight of the module, the length of the module, the deadweight of the cable, the length of the cable, the elastic modulus of the cable, and the cross-sectional area of ​​the cable; the real-time dynamic data includes wind speed, wind direction, snow load, and measured deflection; Obtain the initial deflection; based on the initial deflection, obtain the initial horizontal tension of the cable through the calculation formula of the initial deflection of the photovoltaic flexible support; obtain the combined load of the cable at each moment through the cable self-weight load, component self-weight load, wind load and snow load; according to the combined load at each moment, the cable self-weight load and the initial horizontal tension of the cable, the cable elastic modulus, the cable cross-sectional area, and the span spacing are iterated until convergence, and the horizontal tension of the cable at each moment is obtained; according to the combined load of the cable at each moment, the span spacing, the horizontal tension of the cable at each moment and the support elevation difference, the deflection of the combined load of the photovoltaic flexible support at each moment is obtained; Continuously obtain the measured deflection at several moments, and perform linear fitting on the relationship between the deflection of the combined load of the photovoltaic flexible bracket at several moments to obtain the fitted linear equation; predict the wind direction and wind speed at each subsequent moment, and obtain the combined load of the cable at each subsequent moment; obtain the combined load deflection at each subsequent moment based on the combined load of the cable; input the combined load deflection at each subsequent moment into the fitted linear equation to predict the full-station deflection of the single-layer cable-based photovoltaic flexible bracket, and perform a full-station deflection warning of the single-layer cable-based photovoltaic flexible bracket based on the full-station deflection of the single-layer cable-based photovoltaic flexible bracket and a preset deflection warning threshold.

2. A method for early warning of full-station deflection of a single-layer cable-type photovoltaic flexible support according to claim 1, characterized in that: The obtaining of the initial deflection; According to the initial deflection, the initial horizontal tension of the cable is obtained through the calculation formula of the initial deflection of the photovoltaic flexible support, including: The initial deflection is obtained by obtaining the measured deflection; Where, represents the initial horizontal tension of the cable, represents the cable's own weight load, is the span spacing, Indicates the support elevation difference, Indicates the initial deflection of the photovoltaic flexible support; The cable deadweight load is obtained by the ratio between the cable deadweight and the cable length.

3. The method for early warning of the whole-station deflection of a single-layer cable-type photovoltaic flexible support according to claim 2 is characterized in that: The method obtains the combined load of the cable at each moment through the cable self-weight load, component self-weight load, wind load, and snow load; iterates according to the combined load, cable self-weight load, initial horizontal tension of the cable, cable elastic modulus, cable cross-sectional area, and span spacing at each moment until convergence, and obtains the horizontal tension of the cable at each moment, including: Where, Indicates the The combined load of the cable at each moment, represents the cable's own weight load, Represents the component's own weight load, Indicates the The wind load at this moment, Indicates the Snow load at each moment; Among them, the component deadweight load is obtained by the ratio between the component deadweight and the component length; The process of obtaining the horizontal tension of the cable at each moment is: The horizontal tension of the first iteration is obtained according to the iterative formula of the horizontal tension at each moment; the difference factor of the first iteration is obtained according to the iterative difference formula based on the horizontal tension of the first iteration and the initial horizontal tension. When the difference factor of the first iteration is less than or equal to the preset iteration threshold, the iteration is stopped and the horizontal tension of the first iteration is used as the horizontal tension of the cable at each moment; when the difference factor of the first iteration is greater than the preset iteration threshold, the iteration is continued; According to the horizontal tension iteration formula at each moment, the horizontal tension of the second iteration is obtained; according to the horizontal tension of the second iteration and the horizontal tension of the first iteration, the difference factor of the second iteration is obtained by the iterative difference formula; when the difference factor of the second iteration is less than or equal to the preset iteration threshold, the iteration is stopped and the horizontal tension of the second iteration is used as the horizontal tension of the cable at each moment; when the difference factor of the second iteration is greater than the preset iteration threshold, the iteration is continued; And so on, until the iteration stops and the horizontal tension of the cable at each moment is obtained; Among them, the iterative formula of horizontal tension at each moment is specifically expressed as: Where, Indicates the The horizontal tension of the cable at the moment The horizontal pull of the iteration, Indicates the The horizontal tension of the cable at the moment The horizontal pull of the iteration, is the span spacing, represents the initial horizontal tension of the cable, represents the cable's own weight load, Indicates the The combined load of the cable at each moment, represents the elastic modulus of the cable, represents the cross-sectional area of ​​the cable; Among them, the iterative difference formula is specifically expressed as: Where, Indicates the The horizontal tension of the cable at the moment The horizontal pull of the iteration, Indicates the The horizontal tension of the cable at the moment The horizontal pull of the iteration, Indicates the The horizontal tension of the cable at the moment The difference factor of the iterations, Indicates the absolute value symbol.

4. The method for early warning of the whole-station deflection of a single-layer cable-type photovoltaic flexible support according to claim 1, characterized in that: The method of obtaining the deflection of the photovoltaic flexible support combined load at each moment according to the combined load of the cables at each moment, the span spacing, the horizontal tension of the cables at each moment, and the support elevation difference comprises: Where, Indicates the The horizontal tension of the cable at this moment, Indicates the The combined load of the cable at each moment, is the span spacing, Indicates the support elevation difference, Indicates the The deflection of the photovoltaic flexible support under the combined load at each moment.

5. The method for early warning of the whole-station deflection of a single-layer cable-type photovoltaic flexible support according to claim 1, characterized in that: The continuous acquisition of the measured deflection at several moments and the linear fitting of the relationship between the deflection of the photovoltaic flexible support combined load at several moments to obtain the fitting straight line equation include: The measured deflections at several moments are continuously obtained to form a set of sequences, which are recorded as measured deflection sequences; through the process of obtaining the combined load deflection at each moment, the combined load deflections at several moments are obtained to form a set of sequences, which are recorded as theoretical deflection sequences; the measured deflection is used as the horizontal axis and the combined load deflection is used as the vertical axis to construct the deflection space; the data of all moments in the measured deflection sequence and the theoretical deflection sequence are mapped in the deflection space to obtain several data points, and a linear fit is performed on the several data points by the least squares method to obtain the coefficients and intercepts in the fitted linear equation; and the fitted linear equation is obtained.

6. The method for early warning of the whole-station deflection of a single-layer cable-type photovoltaic flexible support according to claim 4, characterized in that: The wind direction and wind speed at each subsequent moment are predicted, and the combined load of the cable at each subsequent moment is obtained; based on the combined load of the cable at each subsequent moment, the combined load deflection at each subsequent moment is obtained; and the combined load deflection at each subsequent moment is input into the fitting linear equation to predict the full-station deflection of the single-layer cable-based photovoltaic flexible support, including: Based on the mid-span longitude and latitude, as well as wind direction and speed data measured at several previous moments, the wind direction and speed at each subsequent moment are predicted using a mesoscale numerical meteorological forecast model, a fluid dynamics model, and dynamic downscaling. Based on the predicted wind speed and direction, the wind load on the cable at each subsequent moment is obtained using the GB 50009 Code for Loads on Building Structures. The combined load of the cable at each subsequent moment is obtained by adding the cable's own weight load, the component's own weight load, the snow load, and the wind load of the cable at each subsequent moment; the combined load deflection at each subsequent moment is obtained by the deflection of the combined load of the photovoltaic flexible support at each subsequent moment according to the combined load of the cable at each subsequent moment; The combined load-deflection at each subsequent moment is input into the fitting linear equation to predict the actual combined load-deflection at each subsequent moment as the full-station deflection of the single-layer cable-type photovoltaic flexible support.

7. The method for early warning of the whole-station deflection of a single-layer cable-type photovoltaic flexible support according to claim 1, characterized in that: The method of performing a full-station deflection warning of a single-layer cable-based photovoltaic flexible support according to the full-station deflection of the single-layer cable-based photovoltaic flexible support and a preset deflection warning threshold comprises: The deflection matrix of each span position of all steel cables is obtained through the process of obtaining the deflection of the entire station of the single-layer cable-based photovoltaic flexible support. When the deflection in the deflection matrix of each span position of all steel cables is greater than the preset deflection warning threshold, an early warning is issued.

8. A single-layer cable-type photovoltaic flexible support full-station deflection warning system, characterized in that: include: Data acquisition module: used to obtain the intrinsic parameter data and real-time dynamic data of all flexible supports in the photovoltaic power station; the intrinsic parameter data includes the longitude and latitude of the span, the elevation difference of the supports, the span spacing, the deadweight of the module, the deadweight of the cable, the cable length, the elastic modulus of the cable, and the cross-sectional area of ​​the cable; the real-time dynamic data includes wind speed, wind direction, snow load, and measured deflection; Deflection analysis module: used to obtain the initial deflection; based on the initial deflection, the initial horizontal tension of the cable is obtained through the calculation formula of the initial deflection of the photovoltaic flexible support; the combined load of the cable at each moment is obtained through the cable self-weight load, the component self-weight load, the wind load and the snow load; based on the combined load at each moment, the cable self-weight load and the initial horizontal tension of the cable, the cable elastic modulus, the cable cross-sectional area and the span spacing are iterated until convergence, and the horizontal tension of the cable at each moment is obtained; based on the combined load of the cable at each moment, the span spacing, the horizontal tension of the cable at each moment and the support elevation difference, the deflection of the combined load of the photovoltaic flexible support at each moment is obtained; Early warning module: used to continuously obtain the measured deflection at several moments, and perform linear fitting on the relationship between the deflection of the combined load of the photovoltaic flexible bracket at several moments to obtain the fitted linear equation; predict the wind direction and wind speed at each subsequent moment, and obtain the combined load of the cable at each subsequent moment; obtain the combined load deflection at each subsequent moment based on the combined load of the cable; input the combined load deflection at each subsequent moment into the fitted linear equation to predict the full-station deflection of the single-layer cable-based photovoltaic flexible bracket, and perform a full-station deflection warning of the single-layer cable-based photovoltaic flexible bracket based on the full-station deflection of the single-layer cable-based photovoltaic flexible bracket and the preset deflection warning threshold.

9. An electronic device, characterized in that: It includes a memory, a processor, and a computer program stored in the memory and runnable on the processor. When the processor executes the computer program, it implements the full-station deflection warning method of a single-layer cable-type photovoltaic flexible support as described in any one of claims 1 to 7.

10. A computer-readable storage medium, characterized in that The computer-readable storage medium stores a computer program, and when the computer program is executed by a processor, it implements the full-station deflection warning method of a single-layer cable-type photovoltaic flexible support as described in any one of claims 1 to 7.

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