Photovoltaic tracker strong wind protection early warning method and system

Abstract

The present invention discloses a photovoltaic tracker high wind protection warning method and system, which is applied to a photovoltaic matrix composed of several photovoltaic tracking brackets, several communication boxes, and a host computer. The method includes the following steps: at preset time intervals, the host computer receives first wind speed prediction data for the photovoltaic matrix within a first preset time period; when the maximum predicted wind speed value in the first wind speed prediction data exceeds the first alarm wind speed value preset in the host computer, the first wind speed prediction data is sent to each of the communication boxes; and each of the communication boxes adjusts the corresponding photovoltaic tracking bracket to a corresponding angle based on the maximum predicted wind speed value in the first wind speed prediction data. This method solves the problem of being unable to respond quickly to strong winds due to selection restrictions, and improves the service life of photovoltaic power stations and the power generation efficiency in windy weather.

Description

Technical Field

[0001] The present invention relates to the field of photovoltaic technology, and in particular to a photovoltaic tracker gale protection early warning method and system. Background Art

[0002] A major operational challenge for photovoltaic trackers is the structural safety issues caused by high wind loads. According to existing tracker high wind protection strategies, when the protected wind speed is reached, the controller motor rotates the tracker to the high wind protection angle to prevent flutter and wind loads.

[0003] However, due to hardware limitations of the tracker motor selection, a photovoltaic tracker usually takes 6 to 10 minutes to rotate 60 degrees due to the speed. This makes the tracker's high wind protection response speed very likely to be slower than the speed of the gust. The gust has already blown through and caused damage before the structure reaches the protection angle. Although the high wind protection strategy exists, it may not be effective.

[0004] Therefore, there is a need for a photovoltaic tracker strong wind protection early warning method to prevent the photovoltaic trackers in the photovoltaic power station from being unable to respond quickly to strong winds due to selection restrictions, which may lead to damage to the photovoltaic trackers or a significant reduction in power generation efficiency. This can improve the service life of the photovoltaic power station and the power generation efficiency in strong winds. Summary of the Invention

[0005] To address the technical issue of photovoltaic trackers in photovoltaic power plants being unable to quickly respond to strong winds due to model selection limitations, the present invention provides a photovoltaic tracker high wind protection warning method and system. The specific technical solutions are as follows:

[0006] The present invention provides a photovoltaic tracker gale protection early warning method, which is applied to a photovoltaic matrix composed of a plurality of photovoltaic tracking brackets, a plurality of communication boxes and a host computer, comprising the following steps:

[0007] At every preset time interval, the host computer receives first wind speed prediction data of the photovoltaic array within a first preset time period;

[0008] When the maximum value of the predicted wind speed value in the first wind speed prediction data is greater than the first alarm wind speed value preset in the host computer, the first wind speed prediction data is sent to each of the communication boxes;

[0009] Each of the communication boxes adjusts the corresponding photovoltaic tracking bracket to a corresponding angle according to the maximum value of the predicted wind speed value in the first wind speed prediction data.

[0010] The photovoltaic tracker high wind protection early warning method provided by the present invention accesses wind speed prediction data, so that the photovoltaic matrix can enter the high wind protection mode in advance according to the predicted wind speed information, reserving sufficient time for adjusting the photovoltaic tracking bracket, avoiding the photovoltaic tracking bracket failing to adjust to the appropriate angle when high winds arrive, resulting in hardware damage or a significant reduction in power generation efficiency, thereby improving the service life and power generation efficiency of the photovoltaic matrix.

[0011] In some embodiments, the photovoltaic matrix includes a plurality of photovoltaic sub-arrays, each photovoltaic sub-array corresponds to the communication box one-to-one, and the host computer receives first wind speed prediction data of the photovoltaic matrix within a first preset time period; thereafter, the method further includes:

[0012] The host computer obtains second wind speed prediction data corresponding to each photovoltaic sub-array according to the first wind speed prediction data and the position coordinates of each photovoltaic sub-array;

[0013] When the maximum value of the predicted wind speed value in the second wind speed prediction data is greater than the first alarm wind speed value, the second wind speed prediction data is sent to the communication box to be adjusted corresponding to the photovoltaic subarray;

[0014] The communication box to be adjusted adjusts the corresponding photovoltaic tracking brackets in the photovoltaic sub-array to corresponding angles according to the maximum value of the predicted wind speed value in the corresponding second wind speed prediction data.

[0015] The photovoltaic tracker high wind protection early warning method provided by the present invention performs fine control of each sub-array in the photovoltaic matrix based on wind speed prediction data, so that each sub-array can accurately adjust the angle according to its coordinates, avoiding inaccurate control caused by different wind speeds at different positions in the same photovoltaic matrix, which may lead to damage to the hardware of some sub-arrays, and at the same time avoid the reduction in the overall power distribution quality of the photovoltaic matrix caused by the decline in the power generation quality of some sub-arrays.

[0016] In some embodiments, after sending the second wind speed prediction data to the communication box to be adjusted corresponding to the photovoltaic subarray, the method further includes:

[0017] Determining whether a maximum value of the predicted wind speed value in the second wind speed prediction data is greater than a second alarm wind speed value preset in the communication box to be adjusted;

[0018] If the answer is yes, the communication box to be adjusted adjusts the corresponding photovoltaic tracking brackets in the photovoltaic sub-array to corresponding angles according to the maximum value of the predicted wind speed value in the corresponding second wind speed prediction data.

[0019] The photovoltaic tracker high wind protection warning method provided by the present invention further refines the high wind warning scheme of the photovoltaic matrix by combining the actual situation of the photovoltaic sub-array where the communication box is located with a second alarm wind speed value set locally, and balances the safety and power generation efficiency of the photovoltaic sub-array set under special terrain.

[0020] In some embodiments, if the judgment is yes, the method further includes:

[0021] The communication box to be adjusted obtains the real-time wind speed value of the corresponding photovoltaic sub-array;

[0022] Comparing the real-time wind speed value with a first wind speed value corresponding to a current period in the second wind speed forecast data;

[0023] When the error between the real-time wind speed value and the first wind speed value is within a first preset threshold, the communication box to be adjusted adjusts the corresponding photovoltaic tracking brackets in the photovoltaic sub-array to corresponding angles according to the maximum value of the predicted wind speed value in the corresponding second wind speed prediction data.

[0024] The photovoltaic tracker high wind protection warning method provided by the present invention verifies the accuracy of wind speed prediction data by comparing the current wind speed value of the photovoltaic sub-array, thereby preventing each photovoltaic tracking bracket in the photovoltaic matrix from entering the high wind warning mode due to errors in the wind speed prediction data, resulting in reduced power generation efficiency.

[0025] In some embodiments, the second wind speed prediction data includes a predicted wind speed data graph, and if the determination is yes, the method further includes:

[0026] The communication box to be adjusted obtains a historical wind speed data graph of the corresponding photovoltaic sub-array;

[0027] comparing a first linear trend feature in the historical wind speed data graph with a second linear trend feature in the predicted wind speed data graph;

[0028] When the error between the first linear trend feature and the second linear trend feature is within a second preset threshold, the communication box to be adjusted adjusts the corresponding photovoltaic tracking brackets in the photovoltaic sub-array to the corresponding angle according to the maximum value of the predicted wind speed value in the corresponding second wind speed prediction data.

[0029] The photovoltaic tracker high wind protection warning method provided by the present invention verifies the accuracy of the wind speed prediction data by comparing the linear trend characteristics in the historical wind speed data graph of the photovoltaic sub-array with the predicted wind speed data graph, thereby avoiding the situation where each photovoltaic tracking bracket in the photovoltaic matrix enters the high wind warning mode due to errors in the wind speed prediction data, resulting in reduced power generation efficiency.

[0030] In some embodiments, after the host computer receives the first wind speed prediction data of the photovoltaic matrix within the first preset time period, each of the communication boxes adjusts the corresponding photovoltaic tracking bracket to the corresponding angle according to the maximum value of the predicted wind speed value in the first wind speed prediction data, further comprising:

[0031] The host computer receives the real-time average wind speed value of the photovoltaic matrix;

[0032] When the maximum value of the predicted wind speed value in the first wind speed prediction data is greater than the first alarm wind speed value, and the average wind speed value is less than the maximum value of the predicted wind speed value, the first wind speed prediction data is sent to each of the communication boxes respectively.

[0033] The photovoltaic tracker high wind protection early warning method provided by the present invention compares the maximum value of the predicted wind speed value in the wind speed prediction data with the real-time average wind speed value of the photovoltaic matrix in advance, avoiding the situation where the angle of the photovoltaic tracking bracket is adjusted down when the current wind speed is too high, which affects the device life and power generation efficiency.

[0034] In some embodiments, after adjusting the corresponding photovoltaic tracking brackets to corresponding angles, the method further includes:

[0035] When the maximum values ​​of the average wind speed value and the predicted wind speed value in the first wind speed prediction data are both smaller than the first alarm wind speed value, the host computer sends a recovery instruction to each of the communication boxes, and each of the communication boxes adjusts the corresponding photovoltaic tracking bracket to the working angle.

[0036] In some embodiments, a SCADA data acquisition and monitoring control system is set in the host computer, a data interface is set in the SCADA data acquisition and monitoring control system, the SCADA data acquisition and monitoring control system is communicated with a third-party data platform through the data interface, and the host computer receives wind speed forecast data from the third-party data platform through the data interface.

[0037] The photovoltaic tracker high wind protection early warning method provided by the present invention does not increase additional hardware costs based on existing hardware equipment such as SCADA and communication boxes. It only needs to connect the data interface of wind speed prediction data to the SCADA system and modify the software of the SCADA system and the software of the tracking bracket communication box to achieve the technical solution of the present application without changing the existing hardware foundation.

[0038] In some embodiments, according to another aspect of the present application, the present invention further provides a photovoltaic tracker high wind protection warning system, which is applied to a photovoltaic matrix composed of a plurality of photovoltaic tracking brackets, a plurality of communication boxes, and a host computer, comprising:

[0039] a receiving module, provided in the host computer, for receiving, at every preset time interval, first wind speed prediction data of the photovoltaic array within a first preset time period;

[0040] a first sending module, provided in the host computer and connected to the receiving module, for sending the first wind speed prediction data to each of the communication boxes when the maximum value of the predicted wind speed value in the first wind speed prediction data is greater than the first alarm wind speed value preset in the host computer;

[0041] The first adjustment module is arranged in the communication box and connected to the first sending module, and is used to adjust the photovoltaic tracking bracket corresponding to the communication box to a corresponding angle according to the maximum value of the predicted wind speed value in the first wind speed prediction data.

[0042] In some embodiments, the photovoltaic matrix includes a plurality of photovoltaic sub-arrays, each photovoltaic sub-array corresponds to the communication box on a one-to-one basis, and further includes:

[0043] an acquisition module, provided in the host computer and connected to the receiving module, for acquiring second wind speed prediction data corresponding to each photovoltaic sub-array based on the first wind speed prediction data and the position coordinates of each photovoltaic sub-array;

[0044] a second sending module, provided in the host computer and connected to the acquisition module, for sending the second wind speed prediction data to the communication box to be adjusted corresponding to the photovoltaic subarray when the maximum value of the predicted wind speed value in the second wind speed prediction data is greater than the first alarm wind speed value;

[0045] The second adjustment module is arranged in the communication box and connected to the second sending module, and is used to adjust the plurality of photovoltaic tracking brackets in the photovoltaic sub-array corresponding to the communication box to be adjusted to corresponding angles according to the maximum value of the predicted wind speed value in the corresponding second wind speed prediction data.

[0046] The photovoltaic tracker high wind protection early warning method and system provided by the present invention have at least one of the following technical effects:

[0047] (1) By accessing wind speed prediction data, the photovoltaic matrix can enter the high wind protection mode in advance according to the predicted wind speed information, leaving enough time for adjusting the photovoltaic tracking bracket, avoiding the photovoltaic tracking bracket not being able to adjust to the appropriate angle when strong winds come, resulting in hardware damage or a significant reduction in power generation efficiency, thereby improving the service life and power generation efficiency of the photovoltaic matrix;

[0048] (2) Based on the wind speed forecast data, each sub-array in the photovoltaic matrix is ​​finely controlled so that each sub-array can accurately adjust its angle according to its coordinates, thereby avoiding inaccurate control caused by different wind speeds at different locations in the same photovoltaic matrix, which may lead to damage to the hardware of some sub-arrays, and at the same time avoid the reduction in the overall power distribution quality of the photovoltaic matrix caused by the decline in the power generation quality of some sub-arrays;

[0049] (3) By combining the actual situation of the photovoltaic sub-array where the communication box is located with the local second alarm wind speed value, the strong wind warning scheme of the photovoltaic matrix can be further refined to balance the safety and power generation efficiency of the photovoltaic sub-array set up in special terrain;

[0050] (4) By comparing the current wind speed values ​​of the photovoltaic arrays, the accuracy of the wind speed prediction data is verified to avoid the individual photovoltaic tracking brackets in the photovoltaic matrix entering the high wind warning mode due to the error in the wind speed prediction data, which leads to a decrease in power generation efficiency;

[0051] (5) By comparing the linear trend characteristics in the historical wind speed data graph of the photovoltaic array and the predicted wind speed data graph, the accuracy of the wind speed prediction data is verified to avoid the individual photovoltaic tracking brackets in the photovoltaic matrix entering the high wind warning mode due to the error in the wind speed prediction data, resulting in reduced power generation efficiency;

[0052] (6) By comparing the maximum wind speed value predicted in the wind speed prediction data with the real-time average wind speed value of the photovoltaic matrix in advance, it is avoided that when the current wind speed is too high, the angle of the photovoltaic tracking bracket is adjusted down, which affects the device life and power generation efficiency;

[0053] (7) Based on the existing hardware equipment such as SCADA and communication boxes, without increasing additional hardware costs, it is only necessary to connect the data interface of the wind speed prediction data to the SCADA system and modify the software of the SCADA system and the software of the tracking bracket communication box. The technical solution of this application can be implemented without changing the existing hardware foundation. BRIEF DESCRIPTION OF THE DRAWINGS

[0054] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the following briefly introduces the drawings required for use in the description of the embodiments. 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.

[0055] Figure 1 This is a flow chart of a photovoltaic tracker high wind protection early warning method according to the present invention;

[0056] Figure 2 This is another flow chart of a photovoltaic tracker high wind protection early warning method of the present invention;

[0057] Figure 3 This is a flow chart showing the comparison with the second alarm wind speed value in a photovoltaic tracker high wind protection early warning method of the present invention;

[0058] Figure 4 This is a flow chart of verifying wind speed prediction data in a photovoltaic tracker gale protection early warning method of the present invention;

[0059] Figure 5 Another flow chart for verifying wind speed prediction data in a photovoltaic tracker gale protection early warning method of the present invention;

[0060] Figure 6 This is a flow chart showing a comparison between a photovoltaic tracker high wind protection warning method and the real-time average wind speed value of the photovoltaic matrix;

[0061] Figure 7 This is another flow chart of a photovoltaic tracker high wind protection early warning method according to the present invention;

[0062] Figure 8 This is an example diagram of a photovoltaic tracker high wind protection warning system of the present invention;

[0063] Figure 9 This is another example diagram of a photovoltaic tracker strong wind protection warning system according to the present invention.

[0064] Reference numerals in the figure: receiving module-10, first sending module-20, first adjusting module-30, acquiring module-40, second sending module-50 and second adjusting module-60. DETAILED DESCRIPTION

[0065] In the following description, specific details such as specific system structures and technologies are provided for illustration rather than limitation to facilitate a thorough understanding of the embodiments of the present application. However, it should be clear to those skilled in the art that the present application may be implemented in other embodiments without these specific details. In other cases, detailed descriptions of well-known systems, devices, circuits, and methods are omitted to avoid obstructing the description of the present application with unnecessary details.

[0066] It will be understood that when used in this specification and the appended claims, the term "comprising" indicates the presence of the described features, integers, steps, operations, elements and / or components, but does not preclude the presence or addition of one or more other features, integers, steps, operations, elements, components and / or collections.

[0067] To simplify the drawings, only the parts relevant to the present invention are schematically depicted in each figure; they do not represent the actual structure of the product. Furthermore, to simplify the drawings and facilitate understanding, in some figures, only one component with the same structure or function is schematically depicted or labeled. As used herein, "one" refers not only to "only one" but also to "more than one."

[0068] It should be further understood that the term "and / or" used in this specification and the appended claims refers to and includes any and all possible combinations of one or more of the associated listed items.

[0069] In addition, in the description of the present application, the terms "first", "second", etc. are only used to distinguish the description and cannot be understood as indicating or implying relative importance.

[0070] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the specific embodiments of the present invention will be described below with reference to the accompanying drawings. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings and other embodiments can be obtained based on these drawings without inventive work.

[0071] The technical solution provided by the present invention is applied to a photovoltaic matrix composed of several photovoltaic tracking brackets, several communication boxes and a host computer, wherein each communication box manages and controls the angles of multiple photovoltaic tracking brackets, and each communication box is connected to the host computer for communication and manages the corresponding photovoltaic tracking brackets according to the communication information of the host computer.

[0072] One embodiment of the present invention, as Figure 1 As shown, the present invention provides a photovoltaic tracker high wind protection early warning method, comprising the steps of:

[0073] S100 At every preset time interval, the host computer receives first wind speed prediction data of the photovoltaic array within a first preset time period.

[0074] For example, every hour, the host computer receives wind speed forecast data of the photovoltaic matrix in the next hour from the weather forecast platform based on the latitude and longitude values ​​of the photovoltaic matrix. The wind speed forecast data includes the wind speed forecast value of the photovoltaic matrix at each moment in the next hour. The preset time interval and the first preset period in the host computer may be the same or different. When the preset time interval and the first preset period are different, the duration of the first preset period is required to be greater than the preset time interval. For example, every hour, the wind speed forecast data for the past hour and the next hour are received.

[0075] S200 sends the first wind speed prediction data to each communication box when the maximum value of the predicted wind speed value in the first wind speed prediction data is greater than the first alarm wind speed value preset in the host computer.

[0076] Specifically, a first alarm wind speed value is preset in the host computer. When the maximum predicted wind speed value in the first wind speed prediction data exceeds the preset first alarm wind speed value, the host computer determines that each photovoltaic tracking bracket in the photovoltaic array needs to enter high wind warning mode. The host computer pre-stores the control scheme for the high wind warning mode, and each wind speed corresponds to the angle of the photovoltaic bracket.

[0077] S300 Each communication box adjusts the corresponding photovoltaic tracking bracket to a corresponding angle according to the maximum value of the predicted wind speed value in the first wind speed prediction data.

[0078] For example, a SCADA data acquisition and monitoring control system is set in the host computer, a data interface is set in the SCADA data acquisition and monitoring control system, the SCADA data acquisition and monitoring control system is connected to the third-party data platform through the data interface, and the host computer receives wind speed prediction data from the third-party data platform through the data interface. Based on the existing hardware equipment such as SCADA and communication boxes, no additional hardware cost is added. It is only necessary to connect the data interface of the wind speed prediction data to the SCADA system and modify the software of the SCADA system and the software of the tracking bracket communication box. The technical solution of this application can be implemented without changing the existing hardware foundation.

[0079] The photovoltaic tracker high wind protection warning method provided in this embodiment accesses wind speed prediction data, so that the photovoltaic matrix can enter the high wind protection mode in advance according to the predicted wind speed information, reserving sufficient time for adjusting the photovoltaic tracking bracket, avoiding the photovoltaic tracking bracket failing to adjust to the appropriate angle when high winds arrive, resulting in hardware damage or a significant reduction in power generation efficiency, thereby improving the service life and power generation efficiency of the photovoltaic matrix.

[0080] In one embodiment, the photovoltaic matrix includes several photovoltaic sub-arrays, each photovoltaic sub-array corresponds to a communication box one by one, such as Figure 2 As shown, after the host computer receives the first wind speed prediction data of the photovoltaic matrix within the first preset time period at every preset time interval in step S100, the following steps are further included:

[0081] The S400 host computer obtains second wind speed prediction data corresponding to each photovoltaic sub-array based on the first wind speed prediction data and the position coordinates of each photovoltaic sub-array.

[0082] S500 sends the second wind speed prediction data to the communication box to be adjusted corresponding to the photovoltaic sub-array when the maximum value of the predicted wind speed value in the second wind speed prediction data is greater than the first alarm wind speed value.

[0083] Specifically, after obtaining the second wind speed prediction data corresponding to each photovoltaic sub-array, in the same photovoltaic matrix, there may be photovoltaic sub-arrays whose maximum value of the predicted wind speed value in the second wind speed prediction data is greater than the first alarm wind speed, and there may also be photovoltaic sub-arrays whose maximum value of the predicted wind speed value in the second wind speed prediction data is not greater than the first alarm wind speed. At this time, only the second wind speed prediction data whose maximum value of the predicted wind speed value is greater than the first alarm wind speed is sent to the communication box to be adjusted corresponding to the photovoltaic sub-array, and other second wind speed prediction data are not sent to the corresponding communication box.

[0084] S600: The communication box to be adjusted adjusts a plurality of photovoltaic tracking brackets in the corresponding photovoltaic sub-array to corresponding angles according to the maximum value of the predicted wind speed value in the corresponding second wind speed prediction data.

[0085] The photovoltaic tracker high wind protection warning method provided in this embodiment performs fine control of each subarray in the photovoltaic matrix based on wind speed prediction data, so that each subarray can accurately adjust its angle according to its coordinates, thereby avoiding inaccurate control caused by different wind speeds at different locations in the same photovoltaic matrix, which may lead to damage to the hardware of some subarrays, and at the same time avoid the reduction in the overall power distribution quality of the photovoltaic matrix caused by the decline in power generation quality of some subarrays.

[0086] In one embodiment, Figure 3 As shown, when the maximum value of the predicted wind speed value in the second wind speed prediction data is greater than the first alarm wind speed value, step S500 sends the second wind speed prediction data to the communication box to be adjusted corresponding to the photovoltaic sub-array, and further includes the steps of:

[0087] S610 determines whether the maximum value of the predicted wind speed value in the second wind speed prediction data is greater than the second alarm wind speed value preset in the communication box to be adjusted.

[0088] Specifically, the first alarm wind speed value set in the upper computer is the wind speed alarm value set with reference to the comprehensive geographical location of the photovoltaic matrix. The second alarm wind speed value preset in each communication box is set according to the actual geographical location and terrain conditions of each photovoltaic sub-array. By comparing the maximum value of the predicted wind speed value in the second wind speed prediction data with the second alarm wind speed value in the communication box, it is possible to avoid the situation where the difference between the second alarm wind speed value and the first wind speed alarm value causes the control box to incorrectly adjust the angle of the photovoltaic tracking bracket, thereby reducing the power generation efficiency.

[0089] If the answer in step S620 is yes, the communication box to be adjusted adjusts the plurality of photovoltaic tracking brackets in the corresponding photovoltaic sub-array to corresponding angles according to the maximum value of the predicted wind speed value in the corresponding second wind speed prediction data.

[0090] The photovoltaic tracker high wind protection warning method provided in this embodiment further refines the high wind warning scheme of the photovoltaic matrix by combining the actual situation of the photovoltaic sub-array where the communication box is located with the second alarm wind speed value set locally, and balances the safety and power generation efficiency of the photovoltaic sub-array set under special terrain.

[0091] In one embodiment, Figure 4 As shown, after step S610 determines whether the maximum value of the predicted wind speed value in the second wind speed prediction data is greater than the second alarm wind speed value preset in the communication box to be adjusted, the following steps are also included:

[0092] If the answer in step S631 is yes, the communication box is adjusted to obtain the real-time wind speed value of the corresponding photovoltaic sub-array.

[0093] S632 compares the real-time wind speed value with the first wind speed value corresponding to the current period in the second wind speed forecast data.

[0094] S633 When the error between the real-time wind speed value and the first wind speed value is within a first preset threshold, the communication box to be adjusted adjusts the corresponding photovoltaic tracking brackets in the photovoltaic sub-array to corresponding angles according to the maximum value of the predicted wind speed value in the corresponding second wind speed prediction data.

[0095] For example, the communication box to be adjusted obtains the real-time wind speed value of the corresponding photovoltaic sub-array at the current time 11:00 AM according to the anemometer, compares the real-time wind speed value with the first wind speed value of the current period 11:00 AM in the second wind speed forecast data, and if the error is within the first preset threshold of 5m / s, adjusts several photovoltaic tracking brackets in the corresponding photovoltaic sub-array to the corresponding angle.

[0096] The photovoltaic tracker high wind protection warning method provided in this embodiment verifies the accuracy of the wind speed prediction data by comparing the current wind speed value of the photovoltaic sub-array, thereby preventing each photovoltaic tracking bracket in the photovoltaic matrix from entering the high wind warning mode due to errors in the wind speed prediction data, resulting in reduced power generation efficiency.

[0097] In one embodiment, Figure 5 As shown, after step S610 determines whether the maximum value of the predicted wind speed value in the second wind speed prediction data is greater than the second alarm wind speed value preset in the communication box to be adjusted, the following steps are also included:

[0098] If the answer in step S641 is yes, the communication box is adjusted to obtain a historical wind speed data graph of the corresponding photovoltaic sub-array.

[0099] S642 compares the first linear trend feature in the historical wind speed data graph with the second linear trend feature in the predicted wind speed data graph.

[0100] Specifically, the linear trend characteristics of the wind speed data graph include linear trend characteristic parameters in statistics such as the tangent slope corresponding to each moment, monotonic change, increase, decrease, and fluctuation (fluctuation) deviation.

[0101] The characteristic values ​​such as mean, variance and skewness of wind speed data over a period of time can be calculated, and the wind speed probability distribution can be fitted using commonly used wind speed distribution models (such as Weibull distribution). By providing a more effective and accurate wind speed probability distribution, the implementation of the strong wind protection warning system for photovoltaic power stations can be better protected.

[0102] S643 When the error between the first linear trend feature and the second linear trend feature is within a second preset threshold, the communication box to be adjusted adjusts the corresponding photovoltaic tracking brackets in the photovoltaic sub-array to corresponding angles according to the maximum value of the predicted wind speed value in the corresponding second wind speed prediction data.

[0103] The photovoltaic tracker high wind protection warning method provided by the present invention verifies the accuracy of the wind speed prediction data by comparing the linear trend characteristics in the historical wind speed data graph of the photovoltaic sub-array with the predicted wind speed data graph, thereby avoiding the situation where each photovoltaic tracking bracket in the photovoltaic matrix enters the high wind warning mode due to errors in the wind speed prediction data, resulting in reduced power generation efficiency.

[0104] In one embodiment, Figure 6 As shown, after the host computer receives the first wind speed prediction data of the photovoltaic matrix within the first preset time period at every preset time interval in step S100, each communication box adjusts the corresponding photovoltaic tracking bracket to the corresponding angle according to the maximum value of the predicted wind speed value in the first wind speed prediction data in step S300, and further includes the steps of:

[0105] The S210 host computer receives the real-time average wind speed value of the photovoltaic matrix.

[0106] S220 When the maximum value of the predicted wind speed value in the first wind speed prediction data is greater than the first alarm wind speed value and the average wind speed value is less than the maximum value of the predicted wind speed value, the first wind speed prediction data is sent to each communication box respectively.

[0107] The photovoltaic tracker high wind protection early warning method provided by the present invention compares the maximum value of the predicted wind speed value in the wind speed prediction data with the real-time average wind speed value of the photovoltaic matrix in advance, avoiding the situation where the angle of the photovoltaic tracking bracket is adjusted down when the current wind speed is too high, which affects the device life and power generation efficiency.

[0108] In one embodiment, Figure 7 As shown, after each communication box in step S300 adjusts the corresponding photovoltaic tracking bracket to the corresponding angle according to the maximum value of the predicted wind speed value in the first wind speed prediction data, the following steps are also included:

[0109] When the maximum values ​​of the average wind speed value and the predicted wind speed value in the first wind speed prediction data of S700 are both less than the first alarm wind speed value, the host computer sends a recovery instruction to each communication box, and each communication box adjusts the corresponding photovoltaic tracking bracket to the working angle.

[0110] Specifically, step S700 can also be executed after steps S400 to S600 are executed, and each communication box adjusts its corresponding photovoltaic tracking bracket to the working angle, that is, each communication box adjusts its corresponding photovoltaic tracking bracket to exit the high wind warning mode. If steps S400 to S600 are executed, during the execution of S700, a recovery instruction is sent to each communication box to be adjusted, and each communication box to be adjusted adjusts its corresponding photovoltaic tracking bracket to the working angle.

[0111] In one embodiment, Figure 8 As shown, the present invention also provides a photovoltaic tracker wind protection warning system, which is applied to a photovoltaic matrix composed of several photovoltaic tracking brackets, several communication boxes and a host computer, including a receiving module 10, a first sending module 20 and a first adjustment module 30.

[0112] The receiving module 10 is provided in the host computer and is used to receive the first wind speed prediction data of the photovoltaic matrix within a first preset time period at every preset time interval.

[0113] For example, every hour, the receiving module 10 in the host computer receives the wind speed forecast data of the photovoltaic matrix in the next hour from the weather forecast platform based on the latitude and longitude values ​​of the photovoltaic matrix. The wind speed forecast data includes the wind speed forecast value of the photovoltaic matrix at each moment in the next hour. The preset time interval and the first preset period in the host computer may be the same or different. When the preset time interval and the first preset period are different, the duration of the first preset period is required to be greater than the preset time interval. For example, every hour, the wind speed forecast data for the past hour and the next hour are received.

[0114] The first sending module 20 is set in the host computer and connected to the receiving module 10. It is used to send the first wind speed prediction data to each communication box when the maximum value of the predicted wind speed value in the first wind speed prediction data is greater than the first alarm wind speed value preset in the host computer.

[0115] Specifically, a first alarm wind speed value is pre-set in the host computer. When the maximum predicted wind speed value in the first wind speed prediction data exceeds the first alarm wind speed value preset in the host computer, the first sending module 20 determines that each photovoltaic tracking bracket in the photovoltaic array needs to enter the high wind warning mode. The host computer pre-stores the control scheme for the high wind warning mode, and each wind speed corresponds to the angle of the photovoltaic bracket.

[0116] The first adjustment module 30 is provided in the communication box and connected to the first sending module 20 , and is used to adjust the photovoltaic tracking bracket corresponding to the communication box to a corresponding angle according to the maximum value of the predicted wind speed value in the first wind speed prediction data.

[0117] For example, a SCADA data acquisition and monitoring control system is set in the host computer, a data interface is set in the SCADA data acquisition and monitoring control system, the SCADA data acquisition and monitoring control system is connected to the third-party data platform through the data interface, and the host computer receives wind speed prediction data from the third-party data platform through the data interface. Based on the existing hardware equipment such as SCADA and communication boxes, no additional hardware cost is added. It is only necessary to connect the data interface of the wind speed prediction data to the SCADA system and modify the software of the SCADA system and the software of the tracking bracket communication box. The technical solution of this application can be implemented without changing the existing hardware foundation.

[0118] The photovoltaic tracker high wind protection warning system provided in this embodiment is connected to wind speed prediction data, so that the photovoltaic matrix can enter the high wind protection mode in advance according to the predicted wind speed information, reserving sufficient time for adjusting the photovoltaic tracking bracket, avoiding the photovoltaic tracking bracket failing to adjust to the appropriate angle when high winds arrive, resulting in hardware damage or a significant reduction in power generation efficiency, thereby improving the service life and power generation efficiency of the photovoltaic matrix.

[0119] In one embodiment, Figure 9 As shown, the present invention also provides a photovoltaic tracker wind protection warning system, in which the photovoltaic matrix includes a plurality of photovoltaic sub-arrays, each photovoltaic sub-array corresponds to a communication box one-to-one, and in addition to the receiving module 10, it also includes an acquisition module 40, a second sending module 50 and a second adjustment module 60.

[0120] The acquisition module 40 is provided in the host computer and connected to the receiving module 10 , and is used to acquire the second wind speed prediction data corresponding to each photovoltaic sub-array according to the first wind speed prediction data and the position coordinates of each photovoltaic sub-array.

[0121] The second sending module 50 is set in the host computer and connected to the acquisition module 40. It is used to send the second wind speed prediction data to the communication box to be adjusted corresponding to the photovoltaic sub-array when the maximum value of the predicted wind speed value in the second wind speed prediction data is greater than the first alarm wind speed value.

[0122] Specifically, after obtaining the second wind speed prediction data corresponding to each photovoltaic sub-array, in the same photovoltaic matrix, there may be photovoltaic sub-arrays whose maximum value of the predicted wind speed value in the second wind speed prediction data is greater than the first alarm wind speed, and there may also be photovoltaic sub-arrays whose maximum value of the predicted wind speed value in the second wind speed prediction data is not greater than the first alarm wind speed. At this time, only the second wind speed prediction data whose maximum value of the predicted wind speed value is greater than the first alarm wind speed is sent to the communication box to be adjusted corresponding to the photovoltaic sub-array, and other second wind speed prediction data are not sent to the corresponding communication box.

[0123] The second adjustment module 60 is arranged in the communication box and connected to the second sending module 50, and is used to adjust several photovoltaic tracking brackets in the photovoltaic sub-array corresponding to the communication box to be adjusted to corresponding angles according to the maximum value of the predicted wind speed value in the corresponding second wind speed prediction data.

[0124] The photovoltaic tracker high wind protection warning system provided in this embodiment performs fine control of each subarray in the photovoltaic matrix based on wind speed prediction data, so that each subarray can accurately adjust its angle according to its coordinates, thereby avoiding inaccurate control caused by different wind speeds at different locations in the same photovoltaic matrix, which may cause damage to the hardware of some subarrays, and at the same time avoid the reduction in the overall power distribution quality of the photovoltaic matrix caused by the decline in power generation quality of some subarrays.

[0125] In the above embodiments, the description of each embodiment has its own focus. For parts that are not described or recorded in detail in a certain embodiment, reference can be made to the relevant description of other embodiments.

[0126] Those skilled in the art will appreciate that the units and steps of the various examples described in conjunction with the embodiments disclosed herein can be implemented with electronic hardware, or a combination of computer software and electronic hardware. Whether these functions are performed in hardware or software depends on the specific application and design constraints of the technical solution. Professional and technical personnel can use different methods to implement the described functions for each specific application, but such implementation should not be considered beyond the scope of this application.

[0127] In the embodiments provided herein, it should be understood that the disclosed method and system for high wind protection and early warning of photovoltaic trackers can be implemented in other ways. For example, the above-described embodiment of a method and system for high wind protection and early warning of photovoltaic trackers is merely illustrative. For example, the division of modules or units is merely a logical functional division, and actual implementation may employ alternative divisions. For example, multiple units or modules may be combined or integrated into another system, or some features may be omitted or not implemented. Furthermore, the communication connections shown or discussed may be through interfaces, communication connections between devices or units, or integrated circuits, and may be electrical, mechanical, or other forms.

[0128] The units described as separate components may or may not be physically separate, and the components shown as units may or may not be physical units, that is, they may be located in one place or distributed across multiple network units. Some or all of these units may be selected to achieve the purpose of this embodiment according to actual needs.

[0129] In addition, the functional units in the various embodiments of the present application may be integrated into a single processing unit, or each unit may exist physically separately, or two or more units may be integrated into a single unit. The aforementioned integrated units may be implemented in the form of hardware or software functional units.

[0130] It should be noted that the above is only a preferred embodiment of the present invention. It should be pointed out that for ordinary technicians in this technical field, several improvements and modifications can be made without departing from the principles of the present invention. These improvements and modifications should also be regarded as within the scope of protection of the present invention.

Claims

1. A photovoltaic tracker wind protection early warning method, applied to a photovoltaic matrix consisting of several photovoltaic tracking brackets, several communication boxes and a host computer, characterized in that: Including steps: At every preset time interval, the host computer receives first wind speed prediction data of the photovoltaic array within a first preset time period; When the maximum value of the predicted wind speed value in the first wind speed prediction data is greater than the first alarm wind speed value preset in the host computer, the first wind speed prediction data is sent to each of the communication boxes; Each of the communication boxes adjusts the corresponding photovoltaic tracking bracket to a corresponding angle according to the maximum value of the predicted wind speed value in the first wind speed prediction data; The photovoltaic matrix includes a plurality of photovoltaic sub-arrays, each of which corresponds to the communication box one by one; after the host computer receives the first wind speed prediction data of the photovoltaic matrix within the first preset time period, the method further includes: The host computer obtains second wind speed prediction data corresponding to each photovoltaic sub-array according to the first wind speed prediction data and the position coordinates of each photovoltaic sub-array; When the maximum value of the predicted wind speed value in the second wind speed prediction data is greater than the first alarm wind speed value, the second wind speed prediction data is sent to the communication box to be adjusted corresponding to the photovoltaic subarray; The communication box to be adjusted adjusts the corresponding photovoltaic tracking brackets in the photovoltaic sub-array to corresponding angles according to the maximum value of the predicted wind speed value in the corresponding second wind speed prediction data.

2. A photovoltaic tracker high wind protection early warning method according to claim 1, characterized in that: After sending the second wind speed prediction data to the communication box to be adjusted corresponding to the photovoltaic sub-array, the method further includes: Determining whether a maximum value of the predicted wind speed value in the second wind speed prediction data is greater than a second alarm wind speed value preset in the communication box to be adjusted; If the answer is yes, the communication box to be adjusted adjusts the corresponding photovoltaic tracking brackets in the photovoltaic sub-array to corresponding angles according to the maximum value of the predicted wind speed value in the corresponding second wind speed prediction data.

3. A photovoltaic tracker high wind protection early warning method according to claim 2, characterized in that: If the judgment is yes, it also includes: The communication box to be adjusted obtains the real-time wind speed value of the corresponding photovoltaic sub-array; Comparing the real-time wind speed value with a first wind speed value corresponding to a current period in the second wind speed forecast data; When the error between the real-time wind speed value and the first wind speed value is within a first preset threshold, the communication box to be adjusted adjusts the corresponding photovoltaic tracking brackets in the photovoltaic sub-array to corresponding angles according to the maximum value of the predicted wind speed value in the corresponding second wind speed prediction data.

4. A photovoltaic tracker high wind protection early warning method according to claim 2, characterized in that: The second wind speed prediction data includes a predicted wind speed data graph. If the judgment is yes, the method further includes: The communication box to be adjusted obtains a historical wind speed data graph of the corresponding photovoltaic sub-array; comparing a first linear trend feature in the historical wind speed data graph with a second linear trend feature in the predicted wind speed data graph; When the error between the first linear trend feature and the second linear trend feature is within a second preset threshold, the communication box to be adjusted adjusts the corresponding photovoltaic tracking brackets in the photovoltaic sub-array to the corresponding angle according to the maximum value of the predicted wind speed value in the corresponding second wind speed prediction data.

5. The photovoltaic tracker high wind protection early warning method according to claim 1, characterized in that: After the host computer receives the first wind speed prediction data of the photovoltaic matrix within the first preset time period, each of the communication boxes adjusts the corresponding photovoltaic tracking bracket to the corresponding angle according to the maximum value of the predicted wind speed value in the first wind speed prediction data, and further includes: The host computer receives the real-time average wind speed value of the photovoltaic matrix; When the maximum value of the predicted wind speed value in the first wind speed prediction data is greater than the first alarm wind speed value, and the average wind speed value is less than the maximum value of the predicted wind speed value, the first wind speed prediction data is sent to each of the communication boxes respectively.

6. A photovoltaic tracker high wind protection early warning method according to claim 5, characterized in that: After respectively adjusting the corresponding photovoltaic tracking brackets to corresponding angles, the method further includes: When the maximum values ​​of the average wind speed value and the predicted wind speed value in the first wind speed prediction data are both smaller than the first alarm wind speed value, the host computer sends a recovery instruction to each of the communication boxes, and each of the communication boxes adjusts the corresponding photovoltaic tracking bracket to the working angle.

7. A photovoltaic tracker high wind protection early warning method according to any one of claims 1 to 6, characterized in that: A SCADA data acquisition and monitoring control system is provided in the host computer, a data interface is provided in the SCADA data acquisition and monitoring control system, the SCADA data acquisition and monitoring control system is communicatively connected with a third-party data platform through the data interface, and the host computer receives wind speed prediction data from the third-party data platform through the data interface.

8. A photovoltaic tracker wind protection warning system, applied to a photovoltaic matrix consisting of several photovoltaic tracking brackets, several communication boxes and a host computer, characterized by: include: a receiving module, provided in the host computer, for receiving first wind speed prediction data of the photovoltaic matrix within a first preset time period at every preset time interval; a first sending module, provided in the host computer and connected to the receiving module, for sending the first wind speed prediction data to each of the communication boxes when the maximum value of the predicted wind speed value in the first wind speed prediction data is greater than the first alarm wind speed value preset in the host computer; a first adjustment module, disposed in the communication box and connected to the first sending module, for adjusting the photovoltaic tracking bracket corresponding to the communication box to a corresponding angle according to the maximum value of the predicted wind speed value in the first wind speed prediction data; The photovoltaic matrix includes a plurality of photovoltaic sub-arrays, and each photovoltaic sub-array corresponds to the communication box one by one; an acquisition module, provided in the host computer and connected to the receiving module, for acquiring second wind speed prediction data corresponding to each photovoltaic sub-array based on the first wind speed prediction data and the position coordinates of each photovoltaic sub-array; a second sending module, provided in the host computer and connected to the acquisition module, for sending the second wind speed prediction data to the communication box to be adjusted corresponding to the photovoltaic subarray when the maximum value of the predicted wind speed value in the second wind speed prediction data is greater than the first alarm wind speed value; The second adjustment module is arranged in the communication box and connected to the second sending module, and is used to adjust the plurality of photovoltaic tracking brackets in the photovoltaic sub-array corresponding to the communication box to be adjusted to corresponding angles according to the maximum value of the predicted wind speed value in the corresponding second wind speed prediction data.

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