Photovoltaic support control method, system and device and storage medium

Abstract

The invention relates to the technical field of photovoltaic power generation, in particular to a photovoltaic support control method, system and device and a storage medium, which are suitable for tracking supports and the interval between adjacent tracking supports is adjustable, and the steps are as follows: constructing a wind speed prediction model based on time sequence analysis of historical wind speed data; acquiring a wind speed predicted value at the next tracking occurrence moment and a corresponding current solar incident angle, a bracket tracking angle, a photovoltaic panel width and a photovoltaic panel interval; judging whether the wind speed predicted value is greater than the photovoltaic panel subfissure critical wind speed under the current support tracking angle, and if not, determining a support target interval based on the current solar incident angle and the photovoltaic panel width; and if yes, determining a support target tracking angle based on the current solar incident angle, the width of the photovoltaic panel and the interval, and determining a support target interval based on the support target tracking angle. According to the control strategy provided by the invention, the precise control of the photovoltaic bracket can be realized under strong wind weather conditions and non-strong wind weather conditions, so that the photovoltaic module has power generation and wind resistance capabilities.

Description

Technical Field

[0001] The present invention relates to the technical field of photovoltaic power generation, and in particular to a photovoltaic support control method, system, device and storage medium. Background Art

[0002] There are various situations that affect the safety of photovoltaic modules during the construction and operation and maintenance of photovoltaic power generation systems. A common form of photovoltaic module failure is hidden cracks. Hidden cracks in photovoltaic modules will reduce the power generation efficiency of photovoltaic modules. Strong wind weather is one of the important reasons for hidden cracks in photovoltaic modules. Therefore, the study of wind-induced hidden cracks in solar photovoltaic modules has far-reaching significance for the development of new energy power generation.

[0003] In photovoltaic power generation systems, photovoltaic brackets play a very important role. Currently, there are two main types of photovoltaic brackets: fixed and tracking. As the name suggests, fixed brackets are used to fix photovoltaic panels on a bracket that has a certain angle to the ground. This angle is the inclination angle at which the photovoltaic module can receive the maximum amount of solar radiation in a year. Tracking brackets are used to allow photovoltaic panels to follow the trajectory of the sun. According to the number of rotating axes, tracking brackets can be further divided into single-axis and dual-axis types.

[0004] The reverse tracking mode of the photovoltaic panel is a control strategy of a flat single-axis tracking bracket, which is mainly used to avoid shadows between photovoltaic panels in the early morning and evening, so as to achieve maximum power generation. For example, the Chinese invention patent with the publication number CN118363403B discloses a wind resistance control method and device for a photovoltaic bracket array, and a photovoltaic bracket array system, and specifically discloses that data is obtained by arranging sensors, and the distance between adjacent photovoltaic panels is increased to increase the illumination area of ​​the photovoltaic panel. At the same time, when the wind speed is greater than a preset value, the distance between adjacent photovoltaic panels is reduced to achieve wind resistance of the photovoltaic bracket array. However, the prior art has at least the following defects: (1) It relies on densely arranged sensors to obtain data, the procurement cost is high, and it is difficult to ensure the accuracy of the data after long-term use; (2) It cannot achieve both power generation and wind resistance at the same time, and the economic benefits are poor. Summary of the invention

[0005] The purpose of the present invention is to provide a photovoltaic support control method, system, device and storage medium to solve the technical problem that the existing tracking support cannot have both power generation and wind resistance functions.

[0006] The embodiment of the present invention is implemented by the following technical solution: A photovoltaic support control method, which is applicable to tracking supports and the intervals between adjacent tracking supports are adjustable, comprises the following steps:

[0007] Based on the time series analysis of historical wind speed data in the target area, a wind speed prediction model is constructed to predict the future wind speed w f ;

[0008] Get the wind speed forecast value w at the next tracking time t f，t And the first information corresponding to time t, the first information includes the current solar incident angle θ t , support tracking angle γ 0，t , photovoltaic panel width L and the interval H0 between adjacent photovoltaic panels;

[0009] Determine the wind speed prediction value w f，t Is it greater than the current support tracking angle γ? 0，t The critical wind speed for photovoltaic panel cracking under the condition of t and determining a first bracket target interval H1 based on the photovoltaic panel width L, and adjusting the brackets based on the first bracket target interval H1 to minimize the shadow shielding area of ​​adjacent photovoltaic panels;

[0010] If so, based on the current solar incident angle θ t , the photovoltaic panel width L and the interval H0 determine the bracket target tracking angle γt, based on the bracket target tracking angle γt determine the second bracket target interval H2, based on the bracket target tracking angle γ t The bracket is adjusted with the target interval H2 of the second bracket to optimize the stress time course at the maximum stress of the photovoltaic panel and the shadow shielding area of ​​the adjacent photovoltaic panels.

[0011] According to a preferred embodiment, the expression of the first bracket target interval H1 is H1=L*sin(γ 0，t +θ t ) / sinθ t .

[0012] According to a preferred embodiment, the support target tracking angle γ t The expression of γ is t =arc sin(H0·sinθ t / L)-sinθ t , the expression of the second bracket target interval H2 is H2 = L*sin(γ t +θ t ) / sinθ t -d, where d is the distance between a first position and a second position on the photovoltaic panel, the first position is the location of maximum stress on the higher side of the windward surface, and the second position is the frame on the lower side of the windward surface.

[0013] According to a preferred embodiment, when determining the support target tracking angle γ t Afterwards, the method further comprises: in |γ 0，t -γ t | When it is greater than Δγ / 2, γ t To update, γ t=γ t +Δγ / 2, based on the updated support target tracking angle γ t Adjust the bracket, Δγ is the angular step of tracking the bracket.

[0014] The present invention also provides a photovoltaic support control system, comprising a tracking support, wherein the intervals between adjacent tracking supports are adjustable, and further comprising:

[0015] The wind speed prediction module is used to build a wind speed prediction model based on the time series analysis of historical wind speed data in the target area to predict future wind speeds. f ;

[0016] Data acquisition module, used to obtain the wind speed forecast value w at the next tracking time t f，t And the first information corresponding to time t, the first information includes the current solar incident angle θ t , support tracking angle γ 0，t , photovoltaic panel width L and the interval H0 between adjacent photovoltaic panels;

[0017] An execution module is used to determine the wind speed prediction value w f，t Is it greater than the current support tracking angle γ? 0，t The critical wind speed for photovoltaic panel cracking under the condition of t and determining a first bracket target interval H1 based on the photovoltaic panel width L, and adjusting the brackets based on the first bracket target interval H1 to minimize the shadow shielding area of ​​adjacent photovoltaic panels;

[0018] If so, based on the current solar incident angle θ t , photovoltaic panel width L and interval H0 determine the bracket target tracking angle γ t , based on the bracket target tracking angle γ t Determine the second bracket target interval H2 based on the bracket target tracking angle γ t The bracket is adjusted with the target interval H2 of the second bracket to optimize the stress time course at the maximum stress of the photovoltaic panel and the shadow shielding area of ​​the adjacent photovoltaic panels.

[0019] According to a preferred embodiment, the expression of the first bracket target interval H1 is H1=L*sin(γ 0，t +θ t ) / sinθ t .

[0020] According to a preferred embodiment, the support target tracking angle γ t The expression of γ is t =arc sin(H0·sinθ t / L)-sinθ t, the expression of the second bracket target interval H2 is H2 = L*sin(γ t +θ t ) / sinθ t -d, where d is the distance between a first position and a second position on the photovoltaic panel, the first position is the location of maximum stress on the higher side of the windward surface, and the second position is the frame on the lower side of the windward surface.

[0021] According to a preferred embodiment, the invention further comprises an updating module, wherein the updating module is used to determine the support target tracking angle γ t Afterwards, in |γ 0，t -γ t | When it is greater than Δγ / 2, γ t To update, γ t =γ t +Δγ / 2, based on the updated support target tracking angle γ t Adjust the bracket, Δγ is the angular step of tracking the bracket.

[0022] The present invention also provides an electronic device, comprising a memory, a processor, and a computer program stored in the memory and executable on the processor, wherein the processor implements the method described above when executing the computer program.

[0023] The present invention also provides a computer-readable storage medium, on which a computer program is stored. When the computer program is executed by a processor, the method described above is implemented.

[0024] The technical solutions of a photovoltaic bracket control method, system, equipment and storage medium provided by the present invention have at least the following advantages and beneficial effects: the control strategy provided by the present invention can realize precise control of the photovoltaic bracket under strong wind weather conditions and non-strong wind weather conditions, taking into account the shadow shielding area of ​​the photovoltaic panel and the stress time history at the maximum stress point of the photovoltaic panel, and to a certain extent solves the problem that the existing tracking bracket cannot have both power generation and wind resistance functions at the same time. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 A schematic flow chart of the photovoltaic support control method provided in Example 1 of the present invention. DETAILED DESCRIPTION

[0026] In order to make the purpose, technical solutions and advantages of the embodiments of the present invention clearer, 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 described embodiments are part of the embodiments of the present invention, not all of the embodiments. Generally, the components of the embodiments of the present invention described and shown in the drawings here can be arranged and designed in various different configurations.

[0027] Example 1

[0028] Figure 1 The schematic diagram of the flow chart of the photovoltaic support control method provided by the embodiment of the present invention. In this embodiment, the photovoltaic support control method provided is applicable to tracking supports and the intervals between adjacent tracking supports are adjustable; see Figure 1 As shown, the photovoltaic support control method includes the following steps:

[0029] Step 1: Based on the time series analysis of historical wind speed data in the target area, a wind speed prediction model is constructed to predict the future wind speed W. f .

[0030] Step 2: Get the wind speed forecast value w at the next tracking time t f，t And the first information corresponding to time t, the first information includes the current solar incident angle θ t , support tracking angle γ 0，t , photovoltaic panel width L and the interval H0 between adjacent photovoltaic panels.

[0031] Step 3: Determine the wind speed prediction value w f，t Is it greater than the current support tracking angle γ? 0，t The critical wind speed for photovoltaic panel cracking under the wind speed prediction value w f，t Less than the current support tracking angle γ 0，t When the critical wind speed for photovoltaic panel cracking is below θ, the interval between adjacent photovoltaic panels is increased, and the increase amount is determined according to the parameters of the photovoltaic panels and the illumination conditions; specifically, in this embodiment, based on the current solar incident angle θ t The photovoltaic panel width L determines the first bracket target interval H1, and the expression of the first bracket target interval H1 is H1 = L*sin(γ 0，t +θ t ) / sinθ t .

[0032] Furthermore, the brackets are adjusted based on the first bracket target interval H1 so as to minimize the shadowing area of ​​adjacent photovoltaic panels.

[0033] At the predicted wind speed value w f，t Greater than or equal to the current support tracking angle γ 0，t When the critical wind speed for photovoltaic panel cracking is θ, the vector angle of the photovoltaic panel is adjusted and the interval between adjacent photovoltaic panels is reduced. The vector angle adjustment amount is determined according to the photovoltaic panel parameters and the illumination conditions, and the interval reduction amount is determined according to the vector angle of the photovoltaic panel. Specifically, in this embodiment, based on the current solar incident angle θ t , photovoltaic panel width L and interval H0 determine the bracket target tracking angle γ t , the support target tracking angle γt The expression of γ is t =arc sin(H0·sinθ t / L)-sinθ t .

[0034] Further, the second bracket target interval H2 is determined based on the bracket target tracking angle γt, and the expression of the second bracket target interval H2 is H2=L*sin(γ t +θ t ) / sinθ t -d, where d is the distance between the first position and the second position on the photovoltaic panel, the first position is the maximum stress on the higher side of the windward surface, and the second position is the frame on the lower side of the windward surface; based on the bracket target tracking angle γ t The bracket is adjusted with the target interval H2 of the second bracket to optimize the stress time course at the maximum stress of the photovoltaic panel and the shadow shielding area of ​​the adjacent photovoltaic panels.

[0035] In one implementation of this embodiment, when determining the support target tracking angle γ t Afterwards, the method further includes tracking the angle γ of the support target t Modification is made to take into account the power generation of the photovoltaic panel; specifically in this embodiment, in |γ 0，t -γ t | When it is greater than Δγ / 2, γ t To update, γ t =γ t +Δγ / 2, based on the updated support target tracking angle γ t The bracket is adjusted, Δγ is the angle step of the tracking bracket. Usually, the angle adjustment range of the tracking bracket is 0° to 90°. The angle step of the tracking bracket can be obtained by further dividing 0° to 90° according to fixed time intervals.

[0036] To sum up, the control strategy provided by the present invention can realize precise control of photovoltaic brackets under strong wind weather conditions and non-strong wind weather conditions, taking into account the shadow shielding area of ​​the photovoltaic panel and the stress time history at the maximum stress point of the photovoltaic panel, and to a certain extent solves the problem that existing tracking brackets cannot have both power generation and wind resistance functions at the same time.

[0037] Example 2

[0038] This embodiment provides a photovoltaic bracket control system based on the technical solution provided in Embodiment 1, including a tracking bracket with adjustable intervals between adjacent tracking brackets, and further including:

[0039] The wind speed prediction module is used to build a wind speed prediction model based on the time series analysis of historical wind speed data in the target area to predict future wind speeds. f .

[0040] Data acquisition module, used to obtain the wind speed forecast value w at the next tracking time t f，t And the first information corresponding to time t, the first information includes the current solar incident angle θ t , support tracking angle γ 0，t , photovoltaic panel width L and the interval H0 between adjacent photovoltaic panels.

[0041] An execution module is used to determine the wind speed prediction value w f，t Is it greater than the current support tracking angle γ? 0，t The critical wind speed for photovoltaic panel cracking under the wind speed prediction value w f，t Less than the current support tracking angle γ 0，t At the critical wind speed for photovoltaic panel cracking under the condition of t The photovoltaic panel width L determines the first bracket target interval H1, and the expression of the first bracket target interval H1 is H1 = L*sin(γ 0，t +θ t ) / sinθ t .

[0042] The bracket is adjusted based on the first bracket target interval H1 to minimize the shadowing area of ​​adjacent photovoltaic panels.

[0043] At the predicted wind speed value w f，t Greater than or equal to the current support tracking angle γ 0，t At the critical wind speed for photovoltaic panel cracking under the condition of t , photovoltaic panel width L and interval H0 determine the bracket target tracking angle γ t , the support target tracking angle γ t The expression of γ is t =arc sin(H0·sinθ t / L)-sinθ t .

[0044] Based on the bracket target tracking angle γ t Determine the second bracket target interval H2, the expression of the second bracket target interval H2 is H2 = L*sin(γ t +θ t ) / sinθ t -d, where d is the distance between the first position and the second position on the photovoltaic panel, the first position is the maximum stress on the higher side of the windward surface, and the second position is the frame on the lower side of the windward surface; based on the bracket target tracking angle γ t The bracket is adjusted with the target interval H2 of the second bracket to optimize the stress time course at the maximum stress of the photovoltaic panel and the shadow shielding area of ​​the adjacent photovoltaic panels.

[0045] In addition, an updating module is included, wherein the updating module is used to determine the support target tracking angle γ t Afterwards, in |γ 0，t -γ t | When it is greater than Δγ / 2, γ t To update, γ t =γ t +Δγ / 2, based on the updated support target tracking angle γ t Adjust the bracket, Δγ is the angular step of tracking the bracket.

[0046] Example 3

[0047] Based on the technical solution provided in Example 1, this embodiment provides an electronic device, including a memory, a processor, and a computer program stored in the memory and executable on the processor, wherein the processor implements the method described in Example 1 when executing the computer program.

[0048] Example 4

[0049] Based on the technical solution provided in Example 1, this embodiment provides a computer-readable storage medium, on which a computer program is stored. When the computer program is executed by a processor, the method described in Example 1 is implemented.

[0050] The above are only preferred embodiments of the present invention and are not intended to limit the present invention. For those skilled in the art, the present invention may have various modifications and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A photovoltaic support control method, applicable to tracking supports and having adjustable intervals between adjacent tracking supports, characterized in that: The following steps are involved: Based on the time series analysis of historical wind speed data in the target area, a wind speed prediction model is constructed to predict the future wind speed w f ; Get the wind speed forecast value w at the next tracking time t f,t And the first information corresponding to time t, the first information includes the current solar incident angle θ t , support tracking angle γ 0,t , photovoltaic panel width L and the interval H0 between adjacent photovoltaic panels; Determine the wind speed prediction value w f,t Is it greater than the current support tracking angle γ 0,t The critical wind speed for photovoltaic panel cracking under the condition of t and determining a first bracket target interval H1 based on the photovoltaic panel width L, and adjusting the brackets based on the first bracket target interval H1 to minimize the shadow shielding area of ​​adjacent photovoltaic panels; If so, based on the current solar incident angle θ t , photovoltaic panel width L and interval H0 determine the bracket target tracking angle γ t , based on the bracket target tracking angle γ t Determine the second bracket target interval H2 based on the bracket target tracking angle γ t The bracket is adjusted with the target interval H2 of the second bracket to optimize the stress time course at the maximum stress of the photovoltaic panel and the shadow shielding area of ​​the adjacent photovoltaic panels.

2. The photovoltaic support control method according to claim 1, characterized in that: The expression of the first bracket target interval H1 is H1=L*sin(γ 0,t +θ t ) / sinθ t .

3. The photovoltaic support control method according to claim 2, characterized in that: The support target tracking angle γ t The expression of γ is t =arc sin(H0·sinθ t / L)-·sinθ t , the expression of the second bracket target interval H2 is H2 = L*sin(γ t +θ t ) / sinθ t -d, where d is the distance between a first position and a second position on the photovoltaic panel, the first position is the location of maximum stress on the higher side of the windward surface, and the second position is the frame on the lower side of the windward surface.

4. The photovoltaic support control method according to claim 3, characterized in that: In determining the support target tracking angle γ t Afterwards, the method further comprises: in |γ 0,t -γ t | When it is greater than Δγ / 2, γ t To update, γ t =γ t +Δγ / 2, based on the updated support target tracking angle γ t Adjust the bracket, Δγ is the angular step of tracking the bracket.

5. A photovoltaic support control system, comprising a tracking support and an adjustable interval between adjacent tracking supports, characterized in that: Also includes: The wind speed prediction module is used to build a wind speed prediction model based on the time series analysis of historical wind speed data in the target area to predict future wind speeds. f ; Data acquisition module, used to obtain the wind speed forecast value w at the next tracking time t f,t And the first information corresponding to time t, the first information includes the current solar incident angle θ t , support tracking angle γ 0,t , photovoltaic panel width L and the interval H0 between adjacent photovoltaic panels; An execution module is used to determine the wind speed prediction value w f,t Is it greater than the current support tracking angle γ 0,t The critical wind speed for photovoltaic panel cracking under the condition of t and determining a first bracket target interval H1 based on the photovoltaic panel width L, and adjusting the brackets based on the first bracket target interval H1 to minimize the shadow shielding area of ​​adjacent photovoltaic panels; If so, based on the current solar incident angle θ t , photovoltaic panel width L and interval H0 determine the bracket target tracking angle γ t , based on the bracket target tracking angle γ t Determine the second bracket target interval H2 based on the bracket target tracking angle γ t The bracket is adjusted with the target interval H2 of the second bracket to optimize the stress time course at the maximum stress of the photovoltaic panel and the shadow shielding area of ​​the adjacent photovoltaic panels.

6. The photovoltaic support control system according to claim 5, characterized in that: The expression of the first bracket target interval H1 is H1=L*sin(γ 0,t +θ t ) / sinθ t .

7. The photovoltaic support control system according to claim 6, characterized in that: The support target tracking angle γ t The expression of γ is t =arc sin(H0·sinθ t / L)-sinθ t , the expression of the second bracket target interval H2 is H2 = L*sin(γ t +θ t ) / sinθ t -d, where d is the distance between a first position and a second position on the photovoltaic panel, the first position is the location of maximum stress on the higher side of the windward surface, and the second position is the frame on the lower side of the windward surface.

8. The photovoltaic support control system according to claim 7, characterized in that: The update module is used to determine the support target tracking angle γ t Afterwards, in |γ 0,t -γ t | When it is greater than Δγ / 2, γ t To update, γ t =γ t +Δγ / 2, based on the updated support target tracking angle γ t Adjust the bracket, Δγ is the angular step of tracking the bracket.

9. An electronic device comprising a memory, a processor, and a computer program stored in the memory and executable on the processor, wherein: When the processor executes the computer program, the method according to any one of claims 1 to 4 is implemented.

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, the method according to any one of claims 1 to 4 is implemented.

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