Photovoltaic networking control system and method based on radio

Abstract

The invention provides a radio-based photovoltaic networking control method. The radio-based photovoltaic networking control method comprises the following steps: acquiring operation parameters and meteorological information of a photovoltaic networking control system through a parameter acquisition module; performing statistical calculation on the short-circuit current, the voltage drop of the photovoltaic controller and the system temperature through a data analysis unit of the judgment module to obtain a first judgment parameter; performing comprehensive judgment according to the first judgment parameter and the conversion efficiency of the photovoltaic inverter, and generating different tracking commands through a command generation unit of a judgment module; and based on the tracking command, controlling the system tracking module to perform tracking mode adjustment through a mode conversion unit of the judgment module. The control system adjusts the tracking angle according to the real-time operation parameters of the photovoltaic system, and the power generation efficiency of the system is improved.

Description

Technical Field

[0001] The present invention relates to the technical field of photovoltaic power generation, and in particular to a radio-based photovoltaic networking control system and method. Background Art

[0002] Photovoltaic power generation is a technology that uses the photovoltaic effect to directly convert light energy into electrical energy. A photovoltaic system that generates electricity based on this technology may include photovoltaic modules and photovoltaic brackets. The photovoltaic modules are used to receive solar radiation to generate electricity, and the photovoltaic brackets are used to support photovoltaic panels. In photovoltaic power generation systems, the working principle of the commonly used solar tracker is: according to the longitude and latitude of the photovoltaic module installation location and other information, the angle of sunlight at different times of each day of the year is calculated, and the angle of sunlight at each time of the year is stored in the controller of the tracking system. The tracking angle of the photovoltaic system is adjusted according to the angle of sunlight at each time of the photovoltaic module installation location.

[0003] Although keeping the photovoltaic modules perpendicular to the sunlight can ensure that the photovoltaic modules receive the most solar energy, it does not take into account the mutual shading problem between photovoltaic modules. Moreover, excessive absorption of sunlight will increase the current in the photovoltaic system, causing the system to overheat and affect the power generation efficiency of the photovoltaic system. Therefore, it is very necessary to design a radio-based photovoltaic network control system and method. Summary of the invention

[0004] The purpose of the present invention is to provide a radio-based photovoltaic networking control system and method, so as to adjust the tracking angle according to the real-time operating parameters of the photovoltaic system and improve the power generation efficiency of the system.

[0005] To achieve the above object, the present invention provides the following solutions:

[0006] A radio-based photovoltaic networking control system, comprising: a photovoltaic inverter, a power storage device, a photovoltaic controller, a photovoltaic bracket, a photovoltaic module and a networking control subsystem; the photovoltaic inverter, the power storage device, the photovoltaic controller, the photovoltaic bracket and the photovoltaic module are all connected to the networking control subsystem, the photovoltaic controller is connected to the photovoltaic bracket, the photovoltaic bracket is connected to the photovoltaic module, the photovoltaic controller and the photovoltaic inverter are all connected to the power storage device, and the photovoltaic inverter is connected to the photovoltaic module;

[0007] The networking control subsystem includes: a parameter acquisition module, a judgment module and a system tracking module; the parameter acquisition module is respectively connected to the photovoltaic inverter, the power storage device, the photovoltaic controller, the photovoltaic component and the judgment module, the judgment module is connected to the system tracking module, and the system tracking module is connected to the photovoltaic controller.

[0008] Optionally, the parameter acquisition module includes: a data acquisition unit and a weather acquisition unit; the data acquisition unit is respectively connected to the photovoltaic inverter, the power storage device, the photovoltaic controller, the photovoltaic module and the judgment module, and the weather acquisition unit is connected to the judgment module; the data acquisition unit is used to acquire the operating parameters of the photovoltaic inverter, the power storage device, the photovoltaic controller and the photovoltaic module, and the weather acquisition unit is used to acquire meteorological information.

[0009] Optionally, the judging module includes:

[0010] A data analysis unit, which is used to perform statistical calculations on the collected data of the parameter collection module to obtain analysis results;

[0011] A command generation unit, the command generation unit is used to generate different tracking commands according to the analysis results;

[0012] The mode conversion unit and the mode selection unit are used to select different tracking modes according to the tracking command.

[0013] Optionally, the system tracking module includes:

[0014] An angle calculation unit, the angle calculation unit is used to obtain a theoretical tracking angle of a photovoltaic module;

[0015] Angle adjustment unit, based on the tracking mode, adjusts the theoretical tracking angle to the optimal tracking angle through the photovoltaic controller.

[0016] A radio-based photovoltaic network control method comprises the following steps:

[0017] Obtain the operating parameters and meteorological information of the photovoltaic network control system; the operating parameters include: short-circuit current, photovoltaic controller voltage drop, photovoltaic inverter conversion efficiency and system temperature; the meteorological information includes: wind speed, wind direction and light intensity;

[0018] The data analysis unit performs statistical calculation on the short-circuit current, the voltage drop of the photovoltaic controller and the system temperature to obtain a first judgment parameter;

[0019] Performing a comprehensive judgment based on the first judgment parameter and the conversion efficiency of the photovoltaic inverter, and generating different tracking commands through a command generation unit;

[0020] Based on the tracking command, the tracking mode is adjusted by controlling the system tracking module through the mode conversion unit.

[0021] Optionally, the calculation formula of the first judgment parameter is: Among them, P is the first judgment parameter, V s is the system output voltage, V d is the voltage drop of the photovoltaic controller, R is the load resistance, I scis the short-circuit current, α is the temperature influence coefficient, T is the system temperature, and T0 is the standard temperature.

[0022] Optionally, a comprehensive judgment is made according to the first judgment parameter and the conversion efficiency of the photovoltaic inverter, and different tracking commands are generated by a command generation unit, specifically including:

[0023] When the first judgment parameter exceeds a preset first threshold, a first tracking command is generated by a command generation unit;

[0024] When the first judgment parameter does not exceed the preset first threshold value, if the photovoltaic inverter conversion efficiency exceeds the preset second threshold value, a second tracking command is generated by the command generation unit;

[0025] When the first judgment parameter does not exceed a preset first threshold and the photovoltaic inverter conversion efficiency does not exceed a preset second threshold, a third tracking command is generated by the command generation unit.

[0026] Optionally, based on the tracking command, the tracking mode is adjusted by controlling the system tracking module through the mode conversion unit, specifically including:

[0027] The mode conversion unit is controlled to execute the first tracking mode according to the first tracking command; the first tracking mode is to adjust the theoretical tracking angle calculated by the angle calculation unit according to the meteorological information to obtain the first tracking angle, and the angle adjustment unit controls the photovoltaic bracket to rotate according to the first tracking angle;

[0028] The mode conversion unit is controlled to execute the second tracking mode according to the second tracking command; the second tracking mode is to adjust the theoretical tracking angle calculated by the angle calculation unit according to the difference in conversion efficiency of the photovoltaic inverter at different time points to obtain a second tracking angle, and the angle adjustment unit controls the photovoltaic bracket to rotate according to the second tracking angle;

[0029] The mode conversion unit is controlled to execute the third tracking mode according to the third tracking command; the third tracking mode is that the angle adjustment unit controls the photovoltaic bracket to rotate according to the theoretical tracking angle calculated by the angle calculation unit.

[0030] Optionally, the first tracking angle maintains the angle between the photovoltaic assembly and the wind direction within a preset angle range, and the angle between the photovoltaic assembly and the sunlight is not less than a preset angle threshold.

[0031] Optionally, the specific steps to obtain the second tracking angle are: record the photovoltaic inverter conversion efficiency and the photovoltaic bracket angle at the first time point, the second time point and the third time point respectively; the time difference between the second time point and the first time point and the third time point is the same; if the difference between the photovoltaic inverter conversion efficiency at the second time point and the first time point and the third time point respectively meets the difference threshold condition, then the theoretical tracking angle is used as the second tracking angle; if the difference between the photovoltaic inverter conversion efficiency at the second time point and the first time point and the third time point respectively does not meet the difference threshold condition, then the photovoltaic bracket change angle corresponding to the minimum value of the difference between the photovoltaic inverter conversion efficiency at the second time point and the first time point and the third time point respectively is selected as the change angle of the photovoltaic bracket at the next time point.

[0032] According to the specific embodiments provided by the present invention, the present invention discloses the following technical effects: a radio-based photovoltaic networking control method, comprising the following steps: obtaining operating parameters and meteorological information of the photovoltaic networking control system through a parameter acquisition module; performing statistical calculations on short-circuit current, photovoltaic controller voltage drop and system temperature through a data analysis unit of a judgment module to obtain a first judgment parameter; performing a comprehensive judgment based on the first judgment parameter and the photovoltaic inverter conversion efficiency, and generating different tracking commands through a command generation unit of the judgment module; based on the tracking command, controlling the system tracking module to adjust the tracking mode through a mode conversion unit of the judgment module. BRIEF DESCRIPTION OF THE DRAWINGS

[0033] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments will be briefly introduced below. 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 creative labor.

[0034] Figure 1 This is a structural diagram of a radio-based photovoltaic networking control system according to an embodiment of the present invention;

[0035] Figure 2 This is a flow chart of a radio-based photovoltaic networking control method according to an embodiment of the present invention;

[0036] Figure 3 A flow chart for generating a tracking command according to an embodiment of the present invention;

[0037] Figure 4 This is a flow chart of tracking mode adjustment according to an embodiment of the present invention.

[0038] Figure numerals: 1. Photovoltaic inverter; 2. Power storage device; 3. Photovoltaic controller; 4. Photovoltaic bracket; 5. Photovoltaic module; 6. Parameter acquisition module; 7. Judgment module; 8. System tracking module. DETAILED DESCRIPTION

[0039] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0040] In order to make the above-mentioned objects, features and advantages of the present invention more obvious and understandable, the present invention is further described in detail below with reference to the accompanying drawings and specific embodiments.

[0041] like Figure 1 As shown, the present invention provides a radio-based photovoltaic networking control system, including: a photovoltaic inverter 1, a power storage device 2, a photovoltaic controller 3, a photovoltaic support 4, a photovoltaic module 5 and a networking control subsystem.

[0042] Specifically, the photovoltaic inverter 1, the power storage device 2, the photovoltaic controller 3, the photovoltaic bracket 4 and the photovoltaic module 5 are all connected to the networking control subsystem, the photovoltaic controller 3 is connected to the photovoltaic bracket 4, the photovoltaic bracket 4 is connected to the photovoltaic module 5, the photovoltaic controller 3 and the photovoltaic inverter 1 are all connected to the power storage device 2, and the photovoltaic inverter 1 is connected to the photovoltaic module 5. Among them, the photovoltaic module 5 is the core part of the photovoltaic system, which is responsible for converting solar energy into electrical energy. Multiple photovoltaic modules 5 are connected in series or in parallel to form a photovoltaic array. The photovoltaic bracket 4 is used to support the photovoltaic module 5 and drive it to rotate to ensure that the tracking angle of the photovoltaic module 5 is the optimal angle. The photovoltaic controller 3 is responsible for monitoring the output of the photovoltaic module 5 and adjusting the current and voltage of the photovoltaic system to prevent the power storage device 2 from being overcharged and over-discharged. The power storage device 2 (such as a battery) is used to store excess electrical energy for use when there is insufficient light. The DC side of the photovoltaic inverter 1 is connected to at least one photovoltaic module 5. When there are multiple photovoltaic modules 5, multiple photovoltaic modules 5 that are electrically connected are connected in series or in parallel to form a photovoltaic group, and are connected in series or in parallel to the DC side of the photovoltaic inverter 1. The photovoltaic inverter 1 is used to convert the received DC power into AC power for supply to the power grid or household use.

[0043] Specifically, the networking control subsystem includes: a parameter acquisition module 6, a judgment module 7 and a system tracking module 8; the parameter acquisition module 6 is wirelessly connected to the photovoltaic inverter 1, the power storage device 2, the photovoltaic controller 3, the photovoltaic component 5 and the judgment module 7 respectively, the judgment module 7 is wirelessly connected to the system tracking module 8, and the system tracking module 8 is wirelessly connected to the photovoltaic controller 3.

[0044] It should be noted that the wireless connection uses LoRa connection. LoRa connection has a long transmission distance, achieving the unity of low power consumption and long distance, and the distance is 3-5 times longer than that of traditional wireless radio frequency communication at the same power consumption.

[0045] More specifically, the parameter acquisition module 6 includes: a data acquisition unit and a weather acquisition unit; the data acquisition unit is respectively connected to the photovoltaic inverter 1, the power storage device 2, the photovoltaic controller 3, the photovoltaic component 5 and the judgment module 7, and the weather acquisition unit is connected to the judgment module 7; the data acquisition unit is used to obtain the operating parameters of the photovoltaic inverter 1, the power storage device 2, the photovoltaic controller 3 and the photovoltaic component 5, and the weather acquisition unit is used to obtain meteorological information.

[0046] More specifically, the judgment module 7 includes:

[0047] A data analysis unit, which is used to perform statistical calculations on the collected data of the parameter collection module 6 to obtain analysis results;

[0048] A command generation unit, the command generation unit is used to generate different tracking commands according to the analysis results;

[0049] The mode conversion unit and the mode selection unit are used to select different tracking modes according to the tracking command.

[0050] More specifically, the system tracking module 8 includes:

[0051] Angle calculation unit, the angle calculation unit is used to obtain the theoretical tracking angle of the photovoltaic module 5; specifically: according to the longitude and latitude of the photovoltaic module 5, the incident angle of sunlight at different times of each day of the year is calculated, so that the angle at which the photovoltaic module 5 and the incident angle of sunlight remain perpendicular is the theoretical tracking angle.

[0052] The angle adjustment unit adjusts the theoretical tracking angle to an optimal tracking angle through the photovoltaic controller 3 based on the tracking mode.

[0053] Applied to the above control system, the embodiment of the present invention also discloses a radio-based photovoltaic network control method, such as Figure 2 As shown, the following steps are included:

[0054] Step 100: Obtain operating parameters and meteorological information of the photovoltaic network control system.

[0055] Specifically, the short-circuit current, the voltage drop of the photovoltaic controller 3, the conversion efficiency of the photovoltaic inverter 1 and the system temperature are obtained through the multi-function electric meter, the single-chip microcomputer, the temperature sensor and the built-in calculation program of the photovoltaic inverter 1. The wind speed and wind direction of the environment where the photovoltaic module 5 is located are obtained through the meteorological measurement device. The light intensity is sensed by the photosensitive sensor of the photovoltaic module 5. All the obtained data are transmitted to the data acquisition unit.

[0056] Step 200: The data analysis unit performs statistical calculations on the short-circuit current, the voltage drop of the photovoltaic controller 3 and the system temperature to obtain a first judgment parameter.

[0057] Specifically, the short-circuit current is closely related to the light intensity. Under high light conditions, the short-circuit current will increase, while under low light conditions, the short-circuit current will decrease. The larger the short-circuit current, the higher the photoelectric conversion efficiency of the photovoltaic module 5. The photovoltaic controller 3 will produce a certain voltage drop when adjusting the voltage, and the voltage drop will cause energy loss, thereby reducing the power generation efficiency of the photovoltaic system. Ideally, the photovoltaic module 5 has the best power generation effect when the surface temperature is 25°C. For every 1°C increase in temperature, the peak power of the photovoltaic module 5 will lose about 0.35% to 0.45%, and the voltage will decrease by about 210-212mV, which has a significant impact on the power generation efficiency of the photovoltaic system. The above three influencing factors are calculated comprehensively, and the first judgment parameter obtained reflects the performance of the photovoltaic system. The calculation formula for the first judgment parameter is:

[0058]

[0059] Among them, P is the first judgment parameter, V s is the system output voltage, V d is the voltage drop of photovoltaic controller 3, R is the load resistance, I sc is the short-circuit current, α is the temperature influence coefficient, T is the system temperature, T0 is the standard temperature, and the standard temperature is 25℃.

[0060] Step 300: Perform a comprehensive judgment based on the first judgment parameter and the conversion efficiency of the photovoltaic inverter 1, and generate different tracking commands through a command generation unit.

[0061] Specifically, the steps for generating a tracking command are as follows: Figure 3 As shown, including:

[0062] Step 301: When the first judgment parameter exceeds a preset first threshold, a first tracking command is generated by a command generation unit; in this embodiment, the preset first threshold is preferably 2.0.

[0063] Step 302: when the first judgment parameter does not exceed the preset first threshold, if the conversion efficiency of the photovoltaic inverter 1 exceeds the preset second threshold, a second tracking command is generated by the command generation unit; in this embodiment, the preset second threshold is preferably 94%.

[0064] Step 303: When the first judgment parameter does not exceed the preset first threshold and the conversion efficiency of the photovoltaic inverter 1 does not exceed the preset second threshold, a third tracking command is generated by a command generation unit.

[0065] Step 400: Based on the tracking command, the mode conversion unit controls the system tracking module 8 to adjust the tracking mode.

[0066] Specific steps are as follows Figure 4 As shown, including:

[0067] Step 401: Control a mode conversion unit to execute a first tracking mode according to a first tracking command.

[0068] Specifically, when the photovoltaic system executes the first tracking mode, it indicates that the power generation efficiency of the photovoltaic system is greatly affected by the system temperature, and the system needs to be cooled to reduce the influence of the system temperature. In this embodiment, the system is cooled by adjusting the tracking angle of the photovoltaic assembly 5, specifically: the theoretical tracking angle calculated by the angle calculation unit is adjusted to the first tracking angle, so that the photovoltaic assembly 5 forms a certain angle with the wind direction, and then the angle adjustment unit controls the photovoltaic bracket 4 to rotate according to the first tracking angle.

[0069] It should be noted that the angle forms an airflow channel between the photovoltaic modules 5, and the heat of the photovoltaic modules 5 is dissipated by the flow of wind. At the same time, the angle of sunlight incident on the photovoltaic modules 5 is also adjusted, so that the amount of solar radiation received by the photovoltaic modules 5 is reduced, reducing the short-circuit current of the system, thereby reducing the system temperature. The angle is calculated based on the principles of aerodynamics using wind speed and wind direction. In the first tracking mode, the angle range is 0° to 30°, and the angle between the adjusted photovoltaic modules 5 and the angle of incidence of sunlight is not less than the preset threshold of 80°. In summary,

[0070] Step 402: Control the mode conversion unit to execute the second tracking mode according to the second tracking command.

[0071] Specifically, when the photovoltaic system executes the second tracking mode, it indicates that the power generation efficiency of the photovoltaic system is less affected by the system temperature. At this time, the power generation efficiency of the photovoltaic system is judged by the conversion efficiency of the photovoltaic inverter 1. In this embodiment, the theoretical tracking angle calculated by the angle calculation unit is adjusted by the difference in conversion efficiency of the photovoltaic inverter 1 before and after the rotation of the photovoltaic assembly 5 to obtain the second tracking angle. Then the angle adjustment unit controls the photovoltaic bracket 4 to rotate according to the second tracking angle.

[0072] More specifically, the specific steps of obtaining the second tracking angle are: recording the conversion efficiency of the photovoltaic inverter 1 and the angle of the photovoltaic bracket 4 at the first time point, the second time point and the third time point respectively. The time difference between the second time point and the first time point and the third time point is the same, which is 15 minutes.

[0073] If the absolute value of the difference between the conversion efficiency of the photovoltaic inverter 1 at the second time point and the first time point and the third time point does not exceed 4%, the theoretical tracking angle is used as the second tracking angle. If the absolute value of the difference between the conversion efficiency of the photovoltaic inverter 1 at the second time point and the first time point and the third time point exceeds 4%, the difference between the conversion efficiency of the photovoltaic inverter 1 at the first time point and the second time point and the difference between the conversion efficiency of the photovoltaic inverter 1 at the second time point and the third time point are compared, and the smaller difference is selected, and the corresponding rotation angle of the photovoltaic bracket 4 within a time interval is used as the rotation angle from the current time point to the next time point.

[0074] It should be noted that, under the condition that there is no need to consider the influence of system temperature on the power generation efficiency of the photovoltaic system, the working performance of the photovoltaic system is mainly manifested by the working efficiency of the photovoltaic inverter 1 in converting direct current into alternating current. By comparing the difference between the conversion efficiency of the photovoltaic inverter 1 in two adjacent time periods, it can be judged whether the rotation angle of the photovoltaic bracket 4 within a time interval can enable the photovoltaic system to maintain a stable working state. When the difference exceeds 4%, it means that the conversion efficiency of the photovoltaic inverter 1 has a large fluctuation, which will cause the system power generation to fluctuate and increase the heat loss of the system, thereby increasing economic losses and increasing the failure rate of the system. Through the adjustment of the tracking angle in the present invention, the stability and reliability of the photovoltaic system are increased.

[0075] Step 403: Control the mode conversion unit to execute the third tracking mode according to the third tracking command.

[0076] Specifically, when the photovoltaic system executes the third tracking mode, it means that the photovoltaic system cannot be in a good working state by adjusting the tracking angle, so the rotation angle of the photovoltaic bracket 4 is no longer adjusted, so that the angle adjustment unit only controls the rotation of the photovoltaic bracket 4 according to the theoretical tracking angle calculated by the angle calculation unit.

[0077] It should be noted that the third tracking mode reduces the extra energy consumption to a minimum while ensuring the normal operation of the photovoltaic system, greatly saving energy and ensuring the service life of the internal devices of the system.

[0078] The beneficial effects of the present invention are as follows:

[0079] 1) The present invention comprehensively considers the influence of various working parameters and environmental factors of the photovoltaic system on the power generation efficiency of the photovoltaic system;

[0080] 2) The working efficiency of the photovoltaic system is improved by implementing different tracking methods on photovoltaic modules.

[0081] The various embodiments in this specification are described in a progressive manner, and each embodiment focuses on the differences from other embodiments. The same or similar parts between the various embodiments can be referenced to each other.

[0082] The present invention uses specific examples to illustrate the principles and implementation methods of the present invention. The above examples are only used to help understand the method and core ideas of the present invention. At the same time, for those skilled in the art, according to the ideas of the present invention, there will be changes in the specific implementation methods and application scope. In summary, the content of this specification should not be understood as limiting the present invention.

Claims

1. A radio-based photovoltaic network control system, characterized in that: include: Photovoltaic inverter, power storage device, photovoltaic controller, photovoltaic bracket, photovoltaic module and networking control subsystem; the photovoltaic inverter, the power storage device, the photovoltaic controller, the photovoltaic bracket and the photovoltaic module are all connected to the networking control subsystem, the photovoltaic controller is connected to the photovoltaic bracket, the photovoltaic bracket is connected to the photovoltaic module, the photovoltaic controller and the photovoltaic inverter are both connected to the power storage device, and the photovoltaic inverter is connected to the photovoltaic module; The networking control subsystem includes: a parameter acquisition module, a judgment module and a system tracking module; the parameter acquisition module is respectively connected to the photovoltaic inverter, the power storage device, the photovoltaic controller, the photovoltaic component and the judgment module, the judgment module is connected to the system tracking module, and the system tracking module is connected to the photovoltaic controller.

2. The radio-based photovoltaic network control system according to claim 1, characterized in that: The parameter acquisition module includes: a data acquisition unit and a weather acquisition unit; the data acquisition unit is respectively connected to the photovoltaic inverter, the power storage device, the photovoltaic controller, the photovoltaic component and the judgment module, and the weather acquisition unit is connected to the judgment module; the data acquisition unit is used to acquire the operating parameters of the photovoltaic inverter, the power storage device, the photovoltaic controller and the photovoltaic component, and the weather acquisition unit is used to acquire meteorological information.

3. The radio-based photovoltaic network control system according to claim 1, characterized in that: The judging module comprises: A data analysis unit, the data analysis unit is used to perform statistical calculations on the collected data of the parameter collection module to obtain analysis results; A command generating unit, the command generating unit is used to generate different tracking commands according to the analysis result; A mode conversion unit, wherein the mode selection unit is used to select different tracking modes according to the tracking command.

4. The radio-based photovoltaic network control system according to claim 3, characterized in that: The system tracking module includes: An angle calculation unit, the angle calculation unit is used to obtain a theoretical tracking angle of the photovoltaic assembly; An angle adjustment unit, wherein the angle adjustment unit adjusts the theoretical tracking angle to an optimal tracking angle through the photovoltaic controller based on the tracking mode.

5. A radio-based photovoltaic network control method, applied to the radio-based photovoltaic network control system according to any one of claims 1 to 4, characterized in that: The steps include: Acquire the operating parameters and meteorological information of the photovoltaic network control system; the operating parameters include: short-circuit current, photovoltaic controller voltage drop, photovoltaic inverter conversion efficiency and system temperature; the meteorological information includes: wind speed, wind direction and light intensity; The data analysis unit performs statistical calculation on the short-circuit current, the voltage drop of the photovoltaic controller and the system temperature to obtain a first judgment parameter; Performing a comprehensive judgment according to the first judgment parameter and the photovoltaic inverter conversion efficiency, and generating different tracking commands through the command generation unit; Based on the tracking command, the system tracking module is controlled by the mode conversion unit to adjust the tracking mode.

6. The radio-based photovoltaic network control method according to claim 5, characterized in that: The calculation formula of the first judgment parameter is: Wherein, P is the first judgment parameter, V s is the system output voltage, V d is the voltage drop of the photovoltaic controller, R is the load resistance, I sc is the short-circuit current, α is the temperature influence coefficient, T is the system temperature, and T0 is the standard temperature.

7. The radio-based photovoltaic network control method according to claim 5, characterized in that: Performing a comprehensive judgment based on the first judgment parameter and the photovoltaic inverter conversion efficiency, generating different tracking commands through the command generation unit, specifically includes: When the first judgment parameter exceeds a preset first threshold, generating a first tracking command through the command generation unit; When the first judgment parameter does not exceed the preset first threshold value, if the photovoltaic inverter conversion efficiency exceeds a preset second threshold value, generating a second tracking command through the command generation unit; When the first judgment parameter does not exceed the preset first threshold and the photovoltaic inverter conversion efficiency does not exceed the preset second threshold, a third tracking command is generated by the command generation unit.

8. The radio-based photovoltaic network control method according to claim 7, characterized in that: Based on the tracking command, controlling the system tracking module to adjust the tracking mode through the mode conversion unit specifically includes: According to the first tracking command, the mode conversion unit is controlled to execute the first tracking mode; the first tracking mode is to adjust the theoretical tracking angle calculated by the angle calculation unit according to the meteorological information to obtain a first tracking angle, and the angle adjustment unit controls the photovoltaic bracket to rotate according to the first tracking angle; According to the second tracking command, the mode conversion unit is controlled to execute the second tracking mode; the second tracking mode is to adjust the theoretical tracking angle calculated by the angle calculation unit according to the difference in conversion efficiency of the photovoltaic inverter at different time points to obtain a second tracking angle, and the angle adjustment unit controls the photovoltaic bracket to rotate according to the second tracking angle; The mode conversion unit is controlled to execute a third tracking mode according to the third tracking command; the third tracking mode is that the angle adjustment unit controls the photovoltaic bracket to rotate according to the theoretical tracking angle calculated by the angle calculation unit.

9. The radio-based photovoltaic network control method according to claim 8, characterized in that: The first tracking angle maintains the angle between the photovoltaic assembly and the wind direction within a preset angle range, and the angle between the photovoltaic assembly and the sunlight is not less than a preset angle threshold.

10. The radio-based photovoltaic network control method according to claim 8, characterized in that: The specific steps for obtaining the second tracking angle are: recording the photovoltaic inverter conversion efficiency and the photovoltaic bracket angle at the first time point, the second time point and the third time point respectively; the time difference between the second time point and the first time point and the third time point is the same; if the difference between the photovoltaic inverter conversion efficiency at the second time point and the first time point and the third time point respectively meets the difference threshold condition, then the theoretical tracking angle is used as the second tracking angle; if the difference between the photovoltaic inverter conversion efficiency at the second time point and the first time point and the third time point respectively does not meet the difference threshold condition, then the photovoltaic bracket change angle corresponding to the minimum value of the difference between the photovoltaic inverter conversion efficiency at the second time point and the first time point and the third time point is selected as the change angle of the photovoltaic bracket at the next time point.

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