A multi-mode switching control system for photovoltaic arrays

Abstract

The invention relates to the technical field of photovoltaic arrays, and discloses a multi-mode switching control system for a photovoltaic array, wherein a first switching unit generates a normal tracking mode based on a sunlight detection point; a second switching unit obtains a shadow shielding state of a photovoltaic array to be switched, and generates a reverse tracking mode based on the shadow shielding state; a third switching unit generates a flat wind avoidance mode based on wind speed environment information; a fourth switching unit generates an inclined snow avoidance mode based on snow accumulation environment information; a fifth switching unit generates a maintenance mode based on an operating state; and when a sixth switching unit detects a preset control condition, a priority control strategy is generated for a normal tracking mode, an inverse tracking mode, a flat wind avoidance mode, an inclined snow avoidance mode, and a maintenance mode, and the working mode of the photovoltaic array is adjusted in real time by real-time monitoring of the working state and external environmental conditions of the photovoltaic array, thereby optimizing the power generation performance of the photovoltaic array, and improving the power generation efficiency of the photovoltaic array and the income of a power station.

Description

Technical Field

[0001] The present invention relates to the technical field of photovoltaic arrays, and in particular to a multi-mode switching control system of a photovoltaic array. Background Art

[0002] Photovoltaic array is a key component in solar power generation system, which is composed of multiple photovoltaic modules or panels connected. Photovoltaic array, also known as PV array, is a DC power generation unit composed of multiple photovoltaic modules or panels mechanically and electrically assembled, mainly used to convert sunlight energy into electrical energy.

[0003] Photovoltaic arrays are an important part of solar power generation systems, and their performance directly affects the power generation efficiency of the entire system. However, due to the constant changes in the external environment and working conditions, such as changes in light intensity, temperature, shadows and other factors, the working state of the photovoltaic array needs to be constantly adjusted to maintain the best operating state. Traditional photovoltaic array control systems can often only work under specific conditions and are difficult to adapt to the complex and changing external environment. They can no longer meet the daily operation needs of power stations and seriously affect the revenue of power stations. The investment in the electrical control part and the slewing mechanism of the original tracking system accounts for too high a proportion. If the original tracking system solution is used for transformation, the excessive economic investment will seriously squeeze the revenue of the power station. Summary of the invention

[0004] The embodiment of the present invention provides a multi-mode switching control system for a photovoltaic array, which is used to solve the technical problems in the prior art that the working mode of the photovoltaic array cannot be adjusted in real time according to the external environment and working conditions, the power generation efficiency of the photovoltaic array cannot be improved, the power station income is seriously affected, and the power generation cost is increased.

[0005] In order to achieve the above object, the present invention provides a multi-mode switching control system for a photovoltaic array, comprising:

[0006] A first switching unit is used to determine a photovoltaic array to be switched and controlled, and to set a plurality of sunlight detection points on the photovoltaic array to be switched and controlled, and to generate a normal tracking mode for the photovoltaic array to be switched and controlled based on the sunlight detection points;

[0007] A second switching unit is used to obtain a shadow shielding state of the photovoltaic array to be switched and generate a reverse tracking mode for the photovoltaic array to be switched based on the shadow shielding state;

[0008] A third switching unit is used to detect the wind speed environment information of the photovoltaic array to be switched, and generate a flat wind avoidance mode for the photovoltaic array to be switched based on the wind speed environment information;

[0009] a fourth switching unit, configured to collect snow environment information of the photovoltaic array to be switched and to generate a tilted snow avoidance mode for the photovoltaic array to be switched based on the snow environment information;

[0010] a fifth switching unit, configured to determine the operating state of the photovoltaic array to be switched and generate a maintenance mode for the photovoltaic array to be switched based on the operating state;

[0011] The sixth switching unit is used to generate a priority control strategy for the normal tracking mode, the reverse tracking mode, the flat wind avoidance mode, the tilted snow avoidance mode and the maintenance mode when a preset control condition is monitored.

[0012] Furthermore, the first switching unit is used for:

[0013] The first switching unit is used to detect the real-time light intensity of each sunlight detection point in real time, and generate a first reference value according to the real-time light intensity;

[0014] The first switching unit is used to obtain the previous historical light intensity and the corresponding historical power generation of each solar illumination detection point;

[0015] The first switching unit is used to obtain a power generation range corresponding to each historical light intensity, wherein the power generation range includes a first power generation and a second power generation, and the first power generation is less than the second power generation;

[0016] The first switching unit is used to divide all historical power generation into sets, wherein when the historical power generation is less than or equal to the corresponding first power generation, all corresponding solar illumination detection points are divided into the first detection point set;

[0017] The first switching unit is used to divide all corresponding sunlight detection points into the second detection point set when the historical power generation is greater than the corresponding first power generation and less than or equal to the corresponding second power generation;

[0018] The first switching unit is used to divide all corresponding sunlight detection points into a third detection point set when the historical power generation is greater than the corresponding second power generation;

[0019] The first switching unit is used to calculate reference values ​​corresponding to all sunlight detection points according to the first reference value, the first detection point set, the second detection point set and the third detection point set;

[0020] The first switching unit is used to extract all reference values ​​in real time, and select the maximum reference value to generate a normal tracking mode for the photovoltaic array to be switched and controlled.

[0021] Furthermore, the first switching unit is used for:

[0022] The first switching unit is used to calculate a first reference optimization value corresponding to the first detection point set, and calculate a reference value of each sunlight detection point in the first detection point set based on the first reference optimization value and the first reference value;

[0023] The first switching unit is used to obtain a second reference optimization value corresponding to the second detection point set, and calculate a reference value of each sunlight detection point in the second detection point set based on the second reference optimization value and the first reference value;

[0024] The first switching unit is used to calculate a third reference optimization value corresponding to the third detection point set, and calculate a reference value of each sunlight detection point in the third detection point set based on the third reference optimization value and the first reference value.

[0025] Furthermore, the first switching unit is used for:

[0026] The first switching unit is used to calculate the first reference optimization value according to the following formula:

[0027]

[0028] Wherein, h1 is the first reference optimization value, n1 is the number of sunlight detection points in the first detection point set, di is the power generation corresponding to the ith sunlight detection point in the first detection point set, d is the first power generation corresponding to the ith sunlight detection point, and f1 is the power generation and value corresponding to the sunlight detection points in the first detection point set;

[0029] The first switching unit is used to calculate the third reference optimization value according to the following formula:

[0030]

[0031] Among them, h3 is the third reference optimization value, n3 is the number of sunlight detection points in the third detection point set, ej is the power generation corresponding to the j-th sunlight detection point in the third detection point set, e is the second power generation corresponding to the j-th sunlight detection point, and f2 is the power generation and value corresponding to the sunlight detection point in the third detection point set.

[0032] Furthermore, the second switching unit is used for:

[0033] The second switching unit is used to obtain real-time image data of the photovoltaic array to be switched and controlled;

[0034] The second switching unit is used to pre-process the real-time image data, wherein the pre-processing includes denoising and contrast enhancement;

[0035] The second switching unit is used to identify the shadow area in the real-time image data based on an edge detection algorithm;

[0036] The second switching unit is used to calculate an area ratio ΔS between the shadow area and the real-time image data, and determine whether to generate a reverse tracking mode according to a relationship between the area ratio ΔS and a preset area ratio S;

[0037] The second switching unit is used for determining not to generate the reverse tracking mode when the area proportion ΔS is less than the preset area proportion S;

[0038] The second switching unit is configured to determine that a reverse tracking mode is generated when the area proportion ΔS is greater than or equal to the preset area proportion S.

[0039] Furthermore, the third switching unit is used for:

[0040] The third switching unit is used to detect the first wind speed data of the photovoltaic array to be switched and controlled at a first preset time node;

[0041] The third switching unit is used to detect the second wind speed data of the photovoltaic array to be switched and controlled at a second preset time node;

[0042] The third switching unit is used to calculate the wind speed data difference between the first wind speed data and the second wind speed data, and calculate the time node difference between the first preset time node and the second preset time node;

[0043] The third switching unit is used to calculate the data ratio of the wind speed data difference and the time node difference, and determine whether to generate a flat-to-wind sheltering mode according to the relationship between the data ratio and a preset data ratio;

[0044] The third switching unit is used for determining not to generate the flat-to-wind avoidance mode when the data ratio is less than the preset data ratio;

[0045] The third switching unit is used to determine and generate a flat-lying wind-avoiding mode when the data ratio is greater than or equal to the preset data ratio.

[0046] Furthermore, the fourth switching unit is used for:

[0047] The fourth switching unit is used to collect the surface temperature and reflectivity data of the photovoltaic array to be switched and controlled in real time using an optical sensor;

[0048] The fourth switching unit is used to determine that snow exists on the photovoltaic array to be switched when the surface temperature is lower than a preset temperature and the reflectivity data is higher than a preset reflectivity;

[0049] The fourth switching unit is used to collect the ambient temperature of the photovoltaic array to be switched and controlled, and predict the snow melting rate according to the ambient temperature;

[0050] The fourth switching unit is used to determine whether to generate a tilted snow avoidance mode according to the relationship between the snow melting rate and a preset snow melting rate;

[0051] The fourth switching unit is used for determining to generate the inclined snow avoidance mode when the snow melting rate is less than the preset snow melting rate;

[0052] The fourth switching unit is used to determine not to generate the inclined snow avoidance mode when the snow melting rate is greater than or equal to the preset snow melting rate.

[0053] Furthermore, the sixth switching unit is used for:

[0054] The sixth switching unit is used to obtain the influence attribute information of each mode on the photovoltaic array to be switched, and calculate the priority value corresponding to each mode according to the influence attribute information, wherein the modes include the normal tracking mode, the reverse tracking mode, the flat wind avoidance mode, the tilted snow avoidance mode and the maintenance mode;

[0055] The sixth switching unit is used to generate a priority control strategy for the photovoltaic array to be switched based on the priority value;

[0056] The sixth switching unit is used to calculate the priority value corresponding to each mode according to the following formula:

[0057]

[0058] Among them, gt is the priority value corresponding to the tth mode, b is the weight corresponding to the tth mode, m is the number of influencing attribute information corresponding to the tth mode, rt is the value of the influencing attribute information corresponding to the tth mode, and kt is the weight of the influencing attribute information corresponding to the tth mode.

[0059] Compared with the prior art, the present invention has the following beneficial effects:

[0060] The present invention discloses a multi-mode switching control system for a photovoltaic array, wherein a first switching unit generates a normal tracking mode based on a sunlight detection point; a second switching unit obtains a shadow shielding state of a photovoltaic array to be switched and controls, and generates a reverse tracking mode based on the shadow shielding state; a third switching unit generates a flat wind avoidance mode based on wind speed environment information; a fourth switching unit generates an inclined snow avoidance mode based on snow accumulation environment information; a fifth switching unit generates a maintenance mode based on an operating state; and when a sixth switching unit detects a preset control condition, a priority control strategy is generated for the normal tracking mode, the reverse tracking mode, the flat wind avoidance mode, the inclined snow avoidance mode and the maintenance mode, and the working mode of the photovoltaic array is adjusted in real time by real-time monitoring of the working state and external environmental conditions of the photovoltaic array, thereby optimizing the power generation performance of the photovoltaic array, and improving the power generation efficiency of the photovoltaic array and the income of the power station. BRIEF DESCRIPTION OF THE DRAWINGS

[0061] Various other advantages and benefits will become apparent to those of ordinary skill in the art by reading the detailed description of the preferred embodiments below. The accompanying drawings are only for the purpose of illustrating the preferred embodiments and are not to be considered as limiting the present invention. Moreover, the same reference symbols are used throughout the accompanying drawings to represent the same components. In the accompanying drawings:

[0062] Figure 1 A schematic structural diagram of a multi-mode switching control system for a photovoltaic array in an embodiment of the present invention is shown. DETAILED DESCRIPTION

[0063] The specific implementation of the present invention is further described in detail below in conjunction with the accompanying drawings and examples. The following examples are used to illustrate the present invention, but are not intended to limit the scope of the present invention.

[0064] In the description of the present application, it should be understood that the terms "center", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", etc., indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present application.

[0065] The terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of the features. In the description of this application, unless otherwise specified, "plurality" means two or more.

[0066] In the description of this application, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood according to specific circumstances.

[0067] The following is a description of preferred embodiments of the present invention with reference to the accompanying drawings.

[0068] like Figure 1 As shown, an embodiment of the present invention discloses a multi-mode switching control system for a photovoltaic array, comprising:

[0069] A first switching unit is used to determine a photovoltaic array to be switched and controlled, and to set a plurality of sunlight detection points on the photovoltaic array to be switched and controlled, and to generate a normal tracking mode for the photovoltaic array to be switched and controlled based on the sunlight detection points;

[0070] A second switching unit is used to obtain a shadow shielding state of the photovoltaic array to be switched and generate a reverse tracking mode for the photovoltaic array to be switched based on the shadow shielding state;

[0071] A third switching unit is used to detect the wind speed environment information of the photovoltaic array to be switched, and generate a flat wind avoidance mode for the photovoltaic array to be switched based on the wind speed environment information;

[0072] a fourth switching unit, configured to collect snow environment information of the photovoltaic array to be switched and to generate a tilted snow avoidance mode for the photovoltaic array to be switched based on the snow environment information;

[0073] a fifth switching unit, configured to determine the operating state of the photovoltaic array to be switched and generate a maintenance mode for the photovoltaic array to be switched based on the operating state;

[0074] The sixth switching unit is used to generate a priority control strategy for the normal tracking mode, the reverse tracking mode, the flat wind avoidance mode, the tilted snow avoidance mode and the maintenance mode when a preset control condition is monitored.

[0075] The beneficial effect of the above technical solution is: the present invention monitors the working status and external environmental conditions of the photovoltaic array in real time, and adjusts the working mode of the photovoltaic array (normal tracking mode, reverse tracking mode, flat wind avoidance mode, tilted snow avoidance mode and maintenance mode) in real time, thereby optimizing the power generation performance of the photovoltaic array, improving the power generation efficiency of the photovoltaic array and the power station income.

[0076] In some embodiments of the present application, the first switching unit is used to:

[0077] The first switching unit is used to detect the real-time light intensity of each sunlight detection point in real time, and generate a first reference value according to the real-time light intensity;

[0078] The first switching unit is used to obtain the previous historical light intensity and the corresponding historical power generation of each solar illumination detection point;

[0079] The first switching unit is used to obtain a power generation range corresponding to each historical light intensity, wherein the power generation range includes a first power generation and a second power generation, and the first power generation is less than the second power generation;

[0080] The first switching unit is used to divide all historical power generation into sets, wherein when the historical power generation is less than or equal to the corresponding first power generation, all corresponding solar illumination detection points are divided into the first detection point set;

[0081] The first switching unit is used to divide all corresponding sunlight detection points into the second detection point set when the historical power generation is greater than the corresponding first power generation and less than or equal to the corresponding second power generation;

[0082] The first switching unit is used to divide all corresponding sunlight detection points into a third detection point set when the historical power generation is greater than the corresponding second power generation;

[0083] The first switching unit is used to calculate reference values ​​corresponding to all sunlight detection points according to the first reference value, the first detection point set, the second detection point set and the third detection point set;

[0084] The first switching unit is used to extract all reference values ​​in real time, and select the maximum reference value to generate a normal tracking mode for the photovoltaic array to be switched and controlled.

[0085] In this embodiment, the product value of the real-time light intensity and the corresponding weight is calculated, and the product value is used as the first reference value.

[0086] The beneficial effect of the above technical solution is: the present invention calculates the reference values ​​corresponding to all sunlight detection points according to the first reference value, the first detection point set, the second detection point set and the third detection point set, and selects the maximum reference value to generate a normal tracking mode for the photovoltaic array to be switched and controlled, so as to ensure that the photovoltaic panel is always facing the sun.

[0087] In some embodiments of the present application, the first switching unit is used to:

[0088] The first switching unit is used to calculate a first reference optimization value corresponding to the first detection point set, and calculate a reference value of each sunlight detection point in the first detection point set based on the first reference optimization value and the first reference value;

[0089] The first switching unit is used to obtain a second reference optimization value corresponding to the second detection point set, and calculate a reference value of each sunlight detection point in the second detection point set based on the second reference optimization value and the first reference value;

[0090] The first switching unit is used to calculate a third reference optimization value corresponding to the third detection point set, and calculate a reference value of each sunlight detection point in the third detection point set based on the third reference optimization value and the first reference value.

[0091] In this embodiment, the first reference optimization value and the third reference optimization value are obtained by calculation, and the second reference optimization value is preset in advance, and the specific value is 1.

[0092] The beneficial effect of the above technical solution is that the present invention can accurately obtain the reference value corresponding to the solar illumination detection point, achieve calculation accuracy, avoid errors, and by setting the corresponding reference optimization value, can further ensure the mode switching accuracy and power generation.

[0093] In some embodiments of the present application, the first switching unit is used to:

[0094] The first switching unit is used to calculate the first reference optimization value according to the following formula:

[0095]

[0096] Wherein, h1 is the first reference optimization value, n1 is the number of sunlight detection points in the first detection point set, di is the power generation corresponding to the ith sunlight detection point in the first detection point set, d is the first power generation corresponding to the ith sunlight detection point, and f1 is the power generation and value corresponding to the sunlight detection points in the first detection point set;

[0097] The first switching unit is used to calculate the third reference optimization value according to the following formula:

[0098]

[0099] Among them, h3 is the third reference optimization value, n3 is the number of sunlight detection points in the third detection point set, ej is the power generation corresponding to the j-th sunlight detection point in the third detection point set, e is the second power generation corresponding to the j-th sunlight detection point, and f2 is the power generation and value corresponding to the sunlight detection point in the third detection point set.

[0100] In some embodiments of the present application, the second switching unit is used to:

[0101] The second switching unit is used to obtain real-time image data of the photovoltaic array to be switched and controlled;

[0102] The second switching unit is used to pre-process the real-time image data, wherein the pre-processing includes denoising and contrast enhancement;

[0103] The second switching unit is used to identify the shadow area in the real-time image data based on an edge detection algorithm;

[0104] The second switching unit is used to calculate an area ratio ΔS between the shadow area and the real-time image data, and determine whether to generate a reverse tracking mode according to a relationship between the area ratio ΔS and a preset area ratio S;

[0105] The second switching unit is used for determining not to generate the reverse tracking mode when the area proportion ΔS is less than the preset area proportion S;

[0106] The second switching unit is configured to determine that a reverse tracking mode is generated when the area proportion ΔS is greater than or equal to the preset area proportion S.

[0107] The beneficial effect of the above technical solution is: when the area ratio ΔS is greater than or equal to the preset area ratio S, it is judged that the reverse tracking mode is generated, so that the photovoltaic panel avoids the shadow area and ensures the power generation efficiency.

[0108] In some embodiments of the present application, the third switching unit is used to:

[0109] The third switching unit is used to detect the first wind speed data of the photovoltaic array to be switched and controlled at a first preset time node;

[0110] The third switching unit is used to detect the second wind speed data of the photovoltaic array to be switched and controlled at a second preset time node;

[0111] The third switching unit is used to calculate the wind speed data difference between the first wind speed data and the second wind speed data, and calculate the time node difference between the first preset time node and the second preset time node;

[0112] The third switching unit is used to calculate the data ratio of the wind speed data difference and the time node difference, and determine whether to generate a flat-to-wind sheltering mode according to the relationship between the data ratio and a preset data ratio;

[0113] The third switching unit is used for determining not to generate the flat-to-wind avoidance mode when the data ratio is less than the preset data ratio;

[0114] The third switching unit is used to determine and generate a flat-lying wind-avoiding mode when the data ratio is greater than or equal to the preset data ratio.

[0115] The beneficial effect of the above technical solution is that when the data ratio is greater than or equal to the preset data ratio, it is a strong wind or bad weather, and the photovoltaic panels are laid flat to reduce the force of the wind and avoid damage.

[0116] In some embodiments of the present application, the fourth switching unit is used to:

[0117] The fourth switching unit is used to collect the surface temperature and reflectivity data of the photovoltaic array to be switched and controlled in real time using an optical sensor;

[0118] The fourth switching unit is used to determine that snow exists on the photovoltaic array to be switched when the surface temperature is lower than a preset temperature and the reflectivity data is higher than a preset reflectivity;

[0119] The fourth switching unit is used to collect the ambient temperature of the photovoltaic array to be switched and controlled, and predict the snow melting rate according to the ambient temperature;

[0120] The fourth switching unit is used to determine whether to generate a tilted snow avoidance mode according to the relationship between the snow melting rate and a preset snow melting rate;

[0121] The fourth switching unit is used for determining to generate the inclined snow avoidance mode when the snow melting rate is less than the preset snow melting rate;

[0122] The fourth switching unit is used to determine not to generate the inclined snow avoidance mode when the snow melting rate is greater than or equal to the preset snow melting rate.

[0123] In this embodiment, a snow melt rate prediction model is pre-trained. The snow melt rate prediction model is trained based on different data samples and the types and matching probabilities of the data samples.

[0124] The beneficial effect of the above technical solution is that the present invention tilts the photovoltaic panels in snowy weather to avoid being covered by snow and maintain the normal operation of the photovoltaic panels.

[0125] In some embodiments of the present application, the maintenance mode can realize functions such as bidirectional operation and leveling, and is used for maintaining and repairing the photovoltaic array tracking bracket.

[0126] In some embodiments of the present application, the sixth switching unit is used to:

[0127] The sixth switching unit is used to obtain the influence attribute information of each mode on the photovoltaic array to be switched, and calculate the priority value corresponding to each mode according to the influence attribute information, wherein the modes include the normal tracking mode, the reverse tracking mode, the flat wind avoidance mode, the tilted snow avoidance mode and the maintenance mode;

[0128] The sixth switching unit is used to generate a priority control strategy for the photovoltaic array to be switched based on the priority value;

[0129] The sixth switching unit is used to calculate the priority value corresponding to each mode according to the following formula:

[0130]

[0131] Among them, gt is the priority value corresponding to the tth mode, b is the weight corresponding to the tth mode, m is the number of influencing attribute information corresponding to the tth mode, rt is the value of the influencing attribute information corresponding to the tth mode, and kt is the weight of the influencing attribute information corresponding to the tth mode.

[0132] In this embodiment, the influencing attribute information includes photovoltaic array power generation performance, power generation efficiency, power generation stability and power generation, etc.

[0133] In this embodiment, the preset control condition is that there are two or more modes occurring simultaneously, such as the normal tracking mode, the reverse tracking mode, the flat wind avoidance mode, the tilted snow avoidance mode and the maintenance mode all exist at the same time, then the preset control condition is met, or the normal tracking mode and the flat wind avoidance mode exist at the same time, then the preset control condition is met.

[0134] The beneficial effect of the above technical solution is: the present invention obtains the impact attribute information of each mode on the photovoltaic array to be switched, and calculates the priority value corresponding to each mode based on the impact attribute information, which can lay the foundation for mode switching and provide data support. When multiple modes need to be switched at the same time, they are executed in sequence according to the priority to ensure normal power generation while avoiding wear and tear of the photovoltaic array.

[0135] In the description of the above embodiments, specific features, structures, materials or characteristics may be combined in a suitable manner in any one or more embodiments or examples.

[0136] Although the present invention has been described above with reference to the embodiments, various modifications may be made thereto and parts thereof may be replaced with equivalents without departing from the scope of the present invention. In particular, as long as there is no structural conflict, the various features in the embodiments disclosed by the present invention may be used in combination with each other in any manner, and the fact that these combinations are not fully described in this specification is only for the sake of omitting space and saving resources.

[0137] Those skilled in the art can understand that the above are only preferred embodiments of the present invention and are not intended to limit the present invention. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art can still modify the technical solutions recorded in the aforementioned embodiments or replace some of the technical features therein by equivalents. 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 multi-mode switching control system for a photovoltaic array, characterized in that: include: A first switching unit is used to determine a photovoltaic array to be switched and controlled, and to set a plurality of sunlight detection points on the photovoltaic array to be switched and controlled, and to generate a normal tracking mode for the photovoltaic array to be switched and controlled based on the sunlight detection points; a second switching unit, configured to obtain a shadow shielding state of the photovoltaic array to be switched and controlled, and generate a reverse tracking mode for the photovoltaic array to be switched and controlled based on the shadow shielding state; A third switching unit is used to detect the wind speed environment information of the photovoltaic array to be switched and controlled, and generate a flattening and wind-avoiding mode for the photovoltaic array to be switched and controlled based on the wind speed environment information; a fourth switching unit, configured to collect snow environment information of the photovoltaic array to be switched and controlled, and generate an inclined snow avoidance mode for the photovoltaic array to be switched and controlled based on the snow environment information; a fifth switching unit, configured to determine the operating state of the photovoltaic array to be switched and controlled, and generate a maintenance mode for the photovoltaic array to be switched and controlled based on the operating state; a sixth switching unit, for generating a priority control strategy for the normal tracking mode, the reverse tracking mode, the flat wind avoidance mode, the tilt snow avoidance mode and the maintenance mode when a preset control condition is detected; The first switching unit is used to detect the real-time illumination intensity of each sunlight detection point in real time, and generate a first reference value according to the real-time illumination intensity; The first switching unit is used to obtain the previous historical light intensity and the corresponding historical power generation of each solar illumination detection point; The first switching unit is used to obtain a power generation range corresponding to each historical light intensity, wherein the power generation range includes a first power generation and a second power generation, and the first power generation is less than the second power generation; The first switching unit is used to divide all historical power generation into sets, wherein when the historical power generation is less than or equal to the corresponding first power generation, all corresponding solar illumination detection points are divided into the first detection point set; The first switching unit is used to divide all corresponding sunlight detection points into the second detection point set when the historical power generation is greater than the corresponding first power generation and less than or equal to the corresponding second power generation; The first switching unit is used to divide all corresponding sunlight detection points into a third detection point set when the historical power generation is greater than the corresponding second power generation; The first switching unit is used to calculate reference values ​​corresponding to all sunlight detection points according to the first reference value, the first detection point set, the second detection point set and the third detection point set; The first switching unit is used to extract all reference values ​​in real time, and select the maximum reference value to generate a normal tracking mode for the photovoltaic array to be switched and controlled.

2. The multi-mode switching control system of a photovoltaic array according to claim 1, characterized in that: The first switching unit is used for: The first switching unit is used to calculate a first reference optimization value corresponding to the first detection point set, and calculate a reference value of each sunlight detection point in the first detection point set based on the first reference optimization value and the first reference value; The first switching unit is used to obtain a second reference optimization value corresponding to the second detection point set, and calculate a reference value of each sunlight detection point in the second detection point set based on the second reference optimization value and the first reference value; The first switching unit is used to calculate a third reference optimization value corresponding to the third detection point set, and calculate a reference value of each sunlight detection point in the third detection point set based on the third reference optimization value and the first reference value.

3. The multi-mode switching control system of the photovoltaic array according to claim 2, characterized in that: The first switching unit is used for: The first switching unit is used to calculate the first reference optimization value according to the following formula: ； Wherein, h1 is the first reference optimization value, n1 is the number of sunlight detection points in the first detection point set, di is the power generation corresponding to the ith sunlight detection point in the first detection point set, d is the first power generation corresponding to the ith sunlight detection point, and f1 is the power generation and value corresponding to the sunlight detection points in the first detection point set; The first switching unit is used to calculate the third reference optimization value according to the following formula: ； Among them, h3 is the third reference optimization value, n3 is the number of sunlight detection points in the third detection point set, ej is the power generation corresponding to the j-th sunlight detection point in the third detection point set, e is the second power generation corresponding to the j-th sunlight detection point, and f2 is the power generation and value corresponding to the sunlight detection point in the third detection point set.

4. The multi-mode switching control system of a photovoltaic array according to claim 1, characterized in that: The second switching unit is used for: The second switching unit is used to obtain real-time image data of the photovoltaic array to be switched and controlled; The second switching unit is used to pre-process the real-time image data, wherein the pre-processing includes denoising and contrast enhancement; The second switching unit is used to identify the shadow area in the real-time image data based on an edge detection algorithm; The second switching unit is used to calculate an area ratio ΔS between the shadow area and the real-time image data, and determine whether to generate a reverse tracking mode according to a relationship between the area ratio ΔS and a preset area ratio S; The second switching unit is used for determining not to generate the reverse tracking mode when the area proportion ΔS is less than the preset area proportion S; The second switching unit is configured to determine that a reverse tracking mode is generated when the area proportion ΔS is greater than or equal to the preset area proportion S.

5. The multi-mode switching control system of a photovoltaic array according to claim 1, characterized in that: The third switching unit is used for: The third switching unit is used to detect the first wind speed data of the photovoltaic array to be switched and controlled at a first preset time node; The third switching unit is used to detect the second wind speed data of the photovoltaic array to be switched and controlled at a second preset time node; The third switching unit is used to calculate the wind speed data difference between the first wind speed data and the second wind speed data, and calculate the time node difference between the first preset time node and the second preset time node; The third switching unit is used to calculate the data ratio of the wind speed data difference and the time node difference, and determine whether to generate a flat-to-wind sheltering mode according to the relationship between the data ratio and a preset data ratio; The third switching unit is used for determining not to generate the flat-to-wind avoidance mode when the data ratio is less than the preset data ratio; The third switching unit is used to determine and generate a flat-lying wind-avoiding mode when the data ratio is greater than or equal to the preset data ratio.

6. The multi-mode switching control system of a photovoltaic array according to claim 1, characterized in that: The fourth switching unit is used for: The fourth switching unit is used to collect the surface temperature and reflectivity data of the photovoltaic array to be switched and controlled in real time using an optical sensor; The fourth switching unit is used to determine that snow exists on the photovoltaic array to be switched when the surface temperature is lower than a preset temperature and the reflectivity data is higher than a preset reflectivity; The fourth switching unit is used to collect the ambient temperature of the photovoltaic array to be switched and controlled, and predict the snow melting rate according to the ambient temperature; The fourth switching unit is used to determine whether to generate a tilted snow avoidance mode according to the relationship between the snow melting rate and a preset snow melting rate; The fourth switching unit is used for determining to generate the inclined snow avoidance mode when the snow melting rate is less than the preset snow melting rate; The fourth switching unit is used to determine not to generate the inclined snow avoidance mode when the snow melting rate is greater than or equal to the preset snow melting rate.

7. The multi-mode switching control system of a photovoltaic array according to claim 1, characterized in that: The sixth switching unit is used for: The sixth switching unit is used to obtain the influence attribute information of each mode on the photovoltaic array to be switched, and calculate the priority value corresponding to each mode according to the influence attribute information, wherein the modes include the normal tracking mode, the reverse tracking mode, the flat wind avoidance mode, the tilted snow avoidance mode and the maintenance mode; The sixth switching unit is used to generate a priority control strategy for the photovoltaic array to be switched based on the priority value; The sixth switching unit is used to calculate the priority value corresponding to each mode according to the following formula: ； Among them, gt is the priority value corresponding to the tth mode, b is the weight corresponding to the tth mode, m is the number of influencing attribute information corresponding to the tth mode, rt is the value of the influencing attribute information corresponding to the tth mode, and kt is the weight of the influencing attribute information corresponding to the tth mode.

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