A method for analyzing power generation of photovoltaic tracking system

Abstract

The invention belongs to the field of solar photovoltaic tracking, and provides a method for analyzing power generation of a photovoltaic tracking system, comprising the steps of: according to historical time-sharing irradiation data, historical time-sharing wind speed data and historical time-sharing wind direction data of a project site, simulating and calculating to obtain first time-sharing power generation data of a photovoltaic tracker for tracking all time periods throughout the year excluding a strong wind protection mode; based on the historical time-sharing irradiation data, historical time-sharing wind speed data and historical time-sharing wind direction data of the project site, simulating and calculating to obtain second time-sharing power generation data of the photovoltaic tracker while maintaining a fixed angle, the second time-sharing power generation data being multi-wind direction time-sharing power generation data; replacing the first time-sharing power generation data corresponding to a time period exceeding a protective wind speed with the second time-sharing power generation data in a corresponding time period and a corresponding wind direction, so as to analyze the total power generation data of the project site including tracking in a strong wind protection mode, and the invention facilitates rapid analysis of actual power generation data of the project site, so as to rapidly analyze actual benefits.

Description

Technical Field

[0001] The invention relates to the field of solar energy tracking, and in particular to a method for analyzing power generation of a photovoltaic tracking system. Background Art

[0002] At present, each photovoltaic tracking system will set a specific set of strong wind protection parameters (i.e. "protective wind speed" and "docking angle") according to its own design. When the ambient wind speed reaches the protective wind speed, the tracking system will stop tracking and enter the docking angle to resist strong winds, that is, it is in strong wind protection mode. In this state, the tracking system cannot track light energy, which will inevitably reduce power generation.

[0003] Currently, the commonly used photovoltaic power station simulation software in the industry does not include power generation analysis related to the strong wind protection state, and provides an ideal situation in a completely tracking state. However, the strong wind protection mode of the photovoltaic tracking system will have a significant impact on the power generation. In addition to field testing, there is no feasible simulation method in the industry, and it is impossible to quickly and accurately analyze any tracking system project, resulting in distorted power generation evaluation results of photovoltaic tracking projects. Summary of the invention

[0004] In order to solve the above problems, the present invention is achieved by the following technologies:

[0005] A method for analyzing power generation of a photovoltaic tracking system, comprising the steps of:

[0006] According to the historical time-sharing irradiation data, historical time-sharing wind speed data and historical time-sharing wind direction data of the project site, the simulation calculation obtains the time-sharing power generation data tracked by the photovoltaic tracker in all periods of the year excluding the strong wind protection mode, which is recorded as the first time-sharing power generation data;

[0007] Based on the historical time-sharing irradiation data, historical time-sharing wind speed data and historical time-sharing wind direction data of the project site, the time-sharing power generation data of the photovoltaic tracker while maintaining a fixed angle is obtained by simulation calculation, which is recorded as the second time-sharing power generation data, and the second time-sharing power generation data is the multi-wind direction time-sharing power generation data; the first time-sharing power generation data, the second time-sharing power generation data, the wind speed and the wind direction data are aligned on the time axis, and the first time-sharing power generation data corresponding to the time period exceeding the protection wind speed is replaced by the second time-sharing power generation data in the corresponding time period and the corresponding wind direction, so as to analyze the total power generation data of the project site including the tracking of the strong wind protection mode.

[0008] Preferably, before replacing the first time-sharing power generation data corresponding to the time period exceeding the protective wind speed with the second time-sharing power generation data in the corresponding time period and the corresponding wind direction, the method further includes a step of unifying the time intervals:

[0009] When the protective wind speed of the photovoltaic tracker is inconsistent with the measured time interval of the historical wind speed, the wind speed conversion coefficient is used to perform time interval conversion so that the protective wind speed is consistent with the measured time interval of the historical wind speed.

[0010] Preferably, the use of wind speed conversion coefficient for time-distance conversion specifically includes:

[0011] The wind speed conversion coefficient is obtained by querying the wind speed time-distance conversion diagram, and the protection wind speed = the design wind speed of the photovoltaic tracking bracket ÷ the wind speed conversion coefficient.

[0012] Preferably, the second time-sharing power generation data includes first wind direction time-sharing power generation data and second wind direction time-sharing power generation data;

[0013] The first wind direction time-sharing power generation data is time-sharing power generation data when the photovoltaic assembly is in a docked position facing the first direction and the photovoltaic assembly is at a certain angle to the reference plane;

[0014] The second wind direction time-sharing power generation data is time-sharing power generation data when the photovoltaic assembly is in a docked position facing the second direction and the photovoltaic assembly forms a certain angle with the reference plane.

[0015] Preferably, the angle between the photovoltaic module and the reference plane ranges from 0 to 60 degrees.

[0016] Preferably, the second time-sharing power generation data also includes horizontal time-sharing power generation data, and the horizontal time-sharing power generation data is the time-sharing power generation data when the photovoltaic tracker is in a horizontal parking position and the angle between the photovoltaic component and the reference plane is zero.

[0017] Preferably, the replacing of the first time-sharing power generation data corresponding to the time period exceeding the protective wind speed with the second time-sharing power generation data in the corresponding time period and the corresponding wind direction specifically includes:

[0018] When the photovoltaic tracker is in the preset strong wind protection mode and the photovoltaic module is docked at a certain angle to the reference surface:

[0019] When the wind direction exceeding the protective wind speed is a first direction, selecting the first wind direction time-sharing power generation data of the time period to replace the first time-sharing power generation data of the corresponding time period;

[0020] When the wind direction exceeding the protective wind speed is the second direction, the second wind direction time-sharing power generation data of the time period is selected to replace the first time-sharing power generation data of the corresponding time period.

[0021] Preferably, the replacing of the first time-sharing power generation data corresponding to the time period exceeding the protective wind speed with the second time-sharing power generation data in the corresponding time period and the corresponding wind direction specifically includes:

[0022] When the photovoltaic tracker is in the preset strong wind protection mode and the photovoltaic modules are parked flat:

[0023] In a time period when the wind speed exceeds the protection wind speed, the horizontal time-sharing power generation data of the time period is selected to replace the first time-sharing power generation data of the corresponding time period.

[0024] The power generation analysis method of a photovoltaic tracking system provided by the present invention has at least the following beneficial effects: the present invention provides a simple and feasible simulation analysis method, which can quickly evaluate the impact of different strong wind protection parameters on the power generation of any project. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] The following will explain the preferred implementation mode in a clear and understandable manner with reference to the accompanying drawings, and further explain the above characteristics, technical features, advantages and implementation methods of a method for analyzing power generation of a photovoltaic tracking system.

[0026] Figure 1 It is a schematic diagram of an embodiment of a method for analyzing power generation of a photovoltaic tracking system in the present invention;

[0027] Figure 2 It is a processing schematic diagram of the tracking system of the present invention when the docking angle is an inclined angle;

[0028] Figure 3 It is a processing schematic diagram of the tracking system of the present invention when the docking angle is flat;

[0029] Figure 4 This is a schematic diagram of an embodiment of a method for analyzing power generation of a photovoltaic tracking system in the present invention.

[0030] Figure 5 It is a schematic diagram of searching for a wind speed conversion coefficient based on the wind speed time-distance conversion diagram Durst curve in the American standard ASCE7-10 of the present invention;

[0031] Figure 6 It is a schematic diagram of data processing for a certain 24 hours in the present invention;

[0032] Figure 7 The invention does not include a full tracking power generation data curve for a certain 24 hours in the strong wind protection mode and a power generation data curve at 30° east and 30° west;

[0033] Figure 8 It is a schematic diagram of the data processing results of a project site in the present invention for 24 hours. DETAILED DESCRIPTION

[0034] In the following description, specific details such as specific system structures, technologies, etc. are provided for the purpose of illustration rather than limitation, so as to provide a thorough understanding of the embodiments of the present application. However, it should be clear to those skilled in the art that the present application may also be implemented in other embodiments without these specific details. In other cases, detailed descriptions of well-known systems, devices, circuits, and methods are omitted to prevent unnecessary details from obstructing the description of the present application.

[0035] It should be understood that when used in this specification and the appended claims, the term "comprising" indicates the presence of the described features, integers, steps, operations, elements and / or components, but does not exclude the presence or addition of one or more other features, integers, steps, operations, elements, components and / or collections.

[0036] In order to simplify the drawings, only the parts related to the present invention are schematically shown in each figure, and they do not represent the actual structure of the product. In addition, in order to simplify the drawings and facilitate understanding, in some figures, only one of the parts with the same structure or function is schematically drawn or marked. In this article, "one" not only means "only one", but also means "more than one".

[0037] It should be further understood that the term “and / or” used in the specification and appended claims refers to any combination and all possible combinations of one or more of the associated listed items, and includes these combinations.

[0038] In addition, in the description of the present application, the terms "first", "second", etc. are only used to distinguish the description and cannot be understood as indicating or implying relative importance.

[0039] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the specific implementation methods of the present invention will be described below with reference to the accompanying drawings. Obviously, the accompanying drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings and other implementation methods can be obtained based on these drawings without creative work.

[0040] In one embodiment, Figure 1 As shown, the present invention provides a method for analyzing power generation of a photovoltaic tracking system, wherein the photovoltaic tracking system is applied to a flat single-axis photovoltaic tracker, wherein the photovoltaic tracker includes a photovoltaic tracking bracket and a photovoltaic module, and the analysis method includes:

[0041] Based on the historical time-sharing irradiation data, historical time-sharing wind speed data and historical time-sharing wind direction data of the project site, S100 simulates and calculates the time-sharing power generation data tracked by the photovoltaic tracker throughout the year without the strong wind protection mode, which is recorded as the first time-sharing power generation data.

[0042] Specifically, the historical time-sharing irradiation data and the corresponding historical time-sharing wind speed and wind direction data of the project site are obtained, and at least one set of data required is imported into the simulation software. For example, the time-sharing power generation data of the photovoltaic tracker in the tracking state throughout the year is obtained by simulating and calculating the historical time-sharing irradiation data only. This time-sharing power generation data is the first time-sharing power generation data. Usually, other meteorological parameters such as temperature and humidity also need to be imported into the simulation software.

[0043] The first time-sharing power generation data is the time-sharing power generation data tracked throughout the year when the photovoltaic tracker is in an ideal state in the prior art, that is, excluding the strong wind protection mode.

[0044] S200 simulates and calculates the time-sharing power generation data of the photovoltaic tracker while maintaining a fixed angle based on the historical time-sharing irradiation data, historical time-sharing wind speed data and historical time-sharing wind direction data of the project site, and records it as the second time-sharing power generation data. The second time-sharing power generation data is the multi-wind direction time-sharing power generation data.

[0045] Exemplarily, at least one set of required data, including historical time-sharing irradiation data, historical time-sharing wind speed data, and historical time-sharing wind direction data of the project site, is imported into the simulation software to simulate the time-sharing power generation data in the docked state. For example, only the historical time-sharing irradiation data is imported into the simulation software to simulate the time-sharing power generation data in the docked state.

[0046] For example, for a photovoltaic tracker with a docking angle of 0 degrees, a set of power generation data of photovoltaic components in a horizontal state can be simulated to represent the situation.

[0047] S300 aligns the first time-sharing power generation data, the second time-sharing power generation data, the wind speed and wind direction data on the time axis, and replaces the first time-sharing power generation data corresponding to the time period exceeding the protective wind speed with the second time-sharing power generation data of the corresponding time period and the corresponding wind direction, so as to analyze the total power generation data of the project site including the tracking of the strong wind protection mode.

[0048] Specifically, the power generation data, wind speed and wind direction data are aligned on the time axis, and the wind speed and wind direction are used as judgment conditions at all unit times, and the power generation data in the tracking state exceeding the protection wind speed is replaced with the power generation data of the corresponding fixed inclination angle.

[0049] In this embodiment, the time-sharing power generation data of "full tracking" and "docked state" throughout the year are obtained by applying general simulation software, and then simple data processing is used to replace the time-sharing power generation data during tracking with the time-sharing power generation data during docking, using wind speed data and wind direction data as conditions, so as to obtain power generation data under the influence of strong wind protection parameters.

[0050] This embodiment can provide a more accurate reference for the impact of the strong wind protection mode of the photovoltaic tracker on the power generation, and can quickly evaluate and compare the strong wind protection modes of different photovoltaic trackers in different project sites, which is convenient for quickly analyzing the benefits of the project site and is simple and easy to implement.

[0051] In one embodiment, before replacing the first time-sharing power generation data corresponding to the time period exceeding the protection wind speed with the second time-sharing power generation data in the corresponding time period and corresponding wind direction, a time interval unification step is also included:

[0052] When the protection wind speed of the photovoltaic tracker is inconsistent with the measured historical wind speed, the wind speed conversion coefficient is used to convert the time interval so that the protection wind speed is consistent with the measured historical wind speed. Since the photovoltaic tracker uses the 3s gust measurement standard for wind speed protection, but the historical wind speed obtained is the average wind speed per hour, it is necessary to change the time interval of the protection wind speed to make it the average protection wind speed per hour.

[0053] In one embodiment, the use of wind speed conversion coefficients for time-distance conversion specifically includes:

[0054] In this embodiment, the wind speed conversion coefficient is obtained by querying the wind speed time-distance conversion diagram, and the protection wind speed = the design wind speed of the photovoltaic tracking bracket / the wind speed conversion coefficient.

[0055] For example, in this embodiment, the project is located in the United States. According to the design standard ASCE7-10 of the project location, the wind speed time-distance conversion diagram is a Durst curve, and the Durst curve uniform time-distance is used. Figure 5 As shown, the ratio of hourly average wind speed to 3-second gust is 1:1.52, that is, the wind speed conversion coefficient is 1.52. The design wind speed of the photovoltaic tracking bracket is 14m / s 3-second gust, which needs to be converted into the equivalent hourly average wind speed of 14÷1.52=9.21m / s.

[0056] It should be noted that the wind speed time-distance conversion diagram is recorded in the building load codes of various countries. Depending on the location of the project, the applicable building load code will also be different.

[0057] In one embodiment, the second time-sharing power generation data includes first wind direction time-sharing power generation data and second wind direction time-sharing power generation data.

[0058] The first wind direction time-sharing power generation data is the time-sharing power generation data when the photovoltaic module is in a docked position facing the first direction and the photovoltaic module is at a certain angle to the reference plane. In this embodiment, the photovoltaic tracker tracks in an east-west direction, and the first direction is when the photovoltaic module is docked in the east direction, which means that the wind direction is east.

[0059] The second wind direction time-sharing power generation data is the time-sharing power generation data when the photovoltaic module is in a docked position facing the second direction and the photovoltaic module is at a certain angle to the reference plane. The second direction is when the photovoltaic module is docked in the west direction, which means the wind direction is west.

[0060] In other embodiments, the photovoltaic tracker tracks in a north-south direction, the first direction may be a direction where the wind direction is south, and the second direction may be a direction where the wind direction is north.

[0061] The photovoltaic module is at an angle of 0-60° to the reference plane, which is the fixed angle maintained by the photovoltaic tracker.

[0062] In one embodiment, the second time-sharing power generation data includes the first wind direction time-sharing power generation data, the second wind direction time-sharing power generation data and the flat time-sharing power generation data. The flat time-sharing power generation data is the time-sharing power generation data when the photovoltaic tracker is in a flat docking position and the angle between the photovoltaic component and the reference plane is zero.

[0063] Exemplarily, each power generation data, wind speed and wind direction data are aligned on the time axis, and the wind speed and wind direction are used as the judgment conditions at all unit times, and the power generation data in the tracking state is replaced with the power generation data of the corresponding fixed inclination angle.

[0064] In one embodiment, replacing the first time-sharing power generation data corresponding to the time period exceeding the protection wind speed with the second time-sharing power generation data in the corresponding time period and corresponding wind direction specifically includes:

[0065] When the photovoltaic tracker is in the preset strong wind protection mode and the photovoltaic module is docked at a certain angle to the reference surface:

[0066] When the wind direction exceeding the protective wind speed is a first direction, selecting the first wind direction time-sharing power generation data of the time period to replace the first time-sharing power generation data of the corresponding time period;

[0067] When the wind direction exceeding the protective wind speed is the second direction, the second wind direction time-sharing power generation data of the time period is selected to replace the first time-sharing power generation data of the corresponding time period.

[0068] Specifically, when the parking angle of the photovoltaic module in the strong wind protection mode of the photovoltaic tracker is set to be inclined with respect to the reference plane, such as Figure 2 As shown, the data processing logic is as follows:

[0069] First, determine whether the wind speed in a certain period exceeds the protection wind speed:

[0070] When the protective wind speed is not exceeded, the original power generation data of the photovoltaic tracker in this period is retained, that is, the time-sharing power generation data in the tracking state and the first time-sharing power generation data.

[0071] Secondly, when the wind speed in a certain period exceeds the protection wind speed, determine the wind direction corresponding to the period:

[0072] When the wind direction is westward, the first time-sharing power generation data of the period is replaced by the second wind direction time-sharing power generation data, that is, the westward docking power generation data;

[0073] When the wind direction is eastward, the first time-sharing power generation data of the period is replaced by the first wind direction time-sharing power generation data, that is, the eastward docking power generation data.

[0074] Exemplarily, each power generation data, wind speed and wind direction data are aligned on the time axis, and the wind speed and wind direction are used as the judgment conditions at all unit times, and the power generation data in the tracking state is replaced with the power generation data of the corresponding fixed inclination angle.

[0075] In one embodiment, replacing the first time-sharing power generation data corresponding to the time period exceeding the protection wind speed with the second time-sharing power generation data in the corresponding time period and corresponding wind direction specifically includes:

[0076] When the photovoltaic tracker is in the preset strong wind protection mode and the photovoltaic modules are parked flat:

[0077] In a time period when the wind speed exceeds the protection wind speed, the horizontal time-sharing power generation data of the time period is selected to replace the first time-sharing power generation data of the corresponding time period.

[0078] Specifically, when the photovoltaic tracker is set in the high wind protection mode and the photovoltaic module is in the horizontal parking position, such as Figure 3 As shown, the data processing logic is as follows:

[0079] When the docking angle of the photovoltaic tracker is set to flat;

[0080] First, determine whether the wind speed in a certain period exceeds the protection wind speed. If it does not exceed the protection wind speed, retain the original power generation data of the photovoltaic tracker in this period, that is, the time-sharing power generation data under the tracking state and the first time-sharing power generation data.

[0081] Secondly, when the wind speed in a certain period exceeds the protection wind speed, the first time-sharing power generation data in the period is replaced by the flat time-sharing power generation data, and the influence of wind direction can be ignored at this time.

[0082] Application examples:

[0083] The design wind speed of a photovoltaic tracking bracket is 14m / s (measured as a 3-second gust at a height of 10M), and the fixed inclination angle is 30° in the high wind mode. It is necessary to calculate the power generation of a 100MWdc photovoltaic power station project located at the coordinates 35.48°N, 101.34°W using this photovoltaic tracker under the influence of high wind protection parameters.

[0084] Step 1: Obtain hourly irradiance data and wind data for a certain year at the coordinate using NREL's NSRDB DataViewer and GES DISC. Figure 6 As shown, the excerpt is the 24-hour data on June 7.

[0085] Step 2, sort and import the data through the database import requirements of the simulation software PVsyst 7.2. Simulate the first time-sharing power generation data of the photovoltaic tracker in the conventional way. This power generation is actually the ideal situation that the photovoltaic tracker is completely in the tracking state without interference throughout the year. Keeping the same electrical parameters, simulate the fixed inclination angles of 30° to the east and 30° to the west respectively. Finally, export their hourly power generation data for the whole year, which are the time-sharing power generation data of the first direction and the time-sharing power generation data of the second direction, in csv format.

[0086] Step 3, in this embodiment, the project is located in the United States. According to the design standard ASCE7-10 of the project location, the wind speed time-distance conversion diagram is a Durst curve, and the Durst curve is used to unify the time distance.

[0087] like Figure 5 As shown, the ratio of hourly average wind speed to 3-second gust is 1:1.52. The design wind speed of the photovoltaic tracking bracket is 14m / s 3-second gust, which needs to be converted into the same hourly average wind speed of 14÷1.52=9.21m / s to unify the time interval.

[0088] By comparison, the ambient wind speed exceeded the protection wind speed of 9.21m / s during the periods of 0:00 to 4:00 and 14:00 to 23:00. During the period of 5:00 to 13:00, the ambient wind speed did not exceed 9.21m / s. Among them, the wind direction at 14:00 was east, and the power generation data with a fixed inclination of 30° to the east was selected for this hour. The wind direction was west at the rest of the time, and the power generation data with a fixed inclination of 30° to the west was selected. After processing the data for 8786 hours throughout the year, the total power generation data under the influence of the tracker's strong wind protection parameters can be obtained.

[0089] Step 4, copy and paste the power generation data, wind speed and wind direction data into the table and align them according to the time axis. The wind direction data has been processed: +1 represents east wind, -1 represents west wind. In other embodiments, when the photovoltaic tracker is tracking in the north-south direction, +1 represents south wind, and -1 represents north wind.

[0090] like Figure 6The excerpt is the 24-hour data of June 7. From 5:00 to 13:00, the ambient wind speed did not exceed 9.21m / s, and the power generation data under the non-interference tracking state was directly selected. From 0:00 to 4:00 and from 14:00 to 23:00, the ambient wind speed exceeded 9.21m / s.

[0091] Among them, the wind direction is east at 14:00, and the power generation data with a fixed inclination angle of 30° to the east is selected for this hour; the wind direction is west at the rest of the time, and the power generation data with a fixed inclination angle of 30° to the west is selected.

[0092] After processing 8786 hours of data throughout the year, the total power generation data under the influence of the strong wind protection mode of the photovoltaic tracker can be obtained, such as Figure 6 The rightmost column.

[0093] Step 4 can also be done by Figure 7 and Figure 8 diagram to understand.

[0094] Figure 7 It includes the power generation curve of non-interference tracking during the entire period (solid black line), the power generation curve with a fixed tilt angle of 30° to the east (long dashed gray line), the power generation curve with a fixed tilt angle of 30° to the west (short dashed black line), and the average wind speed per hour (gray bar graph).

[0095] Figure 8 The medium tracker protection wind speed is the black short dashed line. When the average wind speed exceeds the dashed line, the original undisturbed power generation curve (grey long dashed line) is replaced by a 30° eastward or westward power generation curve, forming a power generation curve under the influence of the high wind protection mode (black solid line).

[0096] It should be noted that the portion between the solid black line and the dashed grey line is the power generation loss caused by the high wind protection mode, among which the gap at 14:00 is caused by the tracker being parked to the east, facing away from the sun.

[0097] In this embodiment, the power generation loss caused by the high wind protection mode can be obtained through simulation analysis, and the actual power generation data of the photovoltaic tracker can be obtained.

[0098] Those skilled in the art can clearly understand that, for the convenience and simplicity of description, only the division of the above-mentioned program modules is used as an example for illustration. In actual applications, the above-mentioned functions can be assigned to different program modules as needed, that is, the internal structure of the device can be divided into different program units or modules to complete all or part of the functions described above. The program modules in the embodiment can be integrated into a processing unit, or each unit can exist physically separately, or two or more units can be integrated into a processing unit, and the above-mentioned integrated unit can be implemented in the form of hardware or in the form of software program units. In addition, the specific names of the program modules are only for the convenience of distinguishing each other, and are not used to limit the scope of protection of this application.

[0099] In the above embodiments, the description of each embodiment has its own emphasis. For parts that are not described or recorded in detail in a certain embodiment, reference can be made to the relevant descriptions of other embodiments.

[0100] Those of ordinary skill in the art will appreciate that the units and algorithm steps of each example described in conjunction with the embodiments disclosed herein can be implemented with electronic hardware, or a combination of computer software and electronic hardware. Whether these functions are performed with hardware or software depends on the specific application and design constraints of the technical solution. Professional and technical personnel can use different methods to implement the described functions for each specific application, but such implementation should not be considered to be beyond the scope of this application.

[0101] In the embodiments provided in the present application, it should be understood that the disclosed devices and methods can be implemented in other ways. Exemplarily, the device embodiments described above are merely schematic. Exemplarily, the division of the modules or units is only a logical function division. There may be other division methods in actual implementation. Exemplarily, multiple units or components can be combined or integrated into another system, or some features can be ignored or not executed. Another point is that the mutual coupling or direct coupling or communication connection shown or discussed can be through some interfaces, and the indirect coupling or communication connection of the device or unit can be electrical, mechanical or other forms.

[0102] The units described as separate components may or may not be physically separated, and the components shown as units may or may not be physical units, that is, they may be located in one place or distributed on multiple network units. Some or all of the units may be selected according to actual needs to achieve the purpose of the solution of this embodiment.

[0103] In addition, each functional unit in each embodiment of the present application may be integrated into one processing unit, or each unit may exist physically separately, or two or more units may be integrated into one unit. The above integrated unit may be implemented in the form of hardware or in the form of software functional units.

[0104] It should be noted that the above embodiments can be freely combined as needed. The above is only a preferred embodiment of the present invention. It should be pointed out that for ordinary technicians in this technical field, several improvements and modifications can be made without departing from the principle of the present invention, and these improvements and modifications should also be considered as the protection scope of the present invention.

Claims

1. A method for analyzing power generation of a photovoltaic tracking system, characterized in that: Includes steps: According to the historical time-sharing irradiation data, historical time-sharing wind speed data and historical time-sharing wind direction data of the project site, the simulation calculation obtains the time-sharing power generation data tracked by the photovoltaic tracker in all periods of the year excluding the strong wind protection mode, which is recorded as the first time-sharing power generation data; Based on the historical time-sharing irradiation data, historical time-sharing wind speed data and historical time-sharing wind direction data of the project site, the time-sharing power generation data of the photovoltaic tracker while maintaining a fixed angle is obtained by simulation calculation, which is recorded as the second time-sharing power generation data, and the second time-sharing power generation data is the multi-wind direction time-sharing power generation data; the first time-sharing power generation data, the second time-sharing power generation data, the wind speed and the wind direction data are aligned on the time axis, and the first time-sharing power generation data corresponding to the time period exceeding the protection wind speed is replaced by the second time-sharing power generation data in the corresponding time period and the corresponding wind direction, so as to analyze the total power generation data of the project site including the tracking of the strong wind protection mode.

2. The method for analyzing power generation of a photovoltaic tracking system according to claim 1, characterized in that: Before replacing the first time-sharing power generation data corresponding to the time period exceeding the protective wind speed with the second time-sharing power generation data in the corresponding time period and the corresponding wind direction, the step of unifying the time interval is also included: When the protective wind speed of the photovoltaic tracker is inconsistent with the measured time interval of the historical wind speed, the wind speed conversion coefficient is used to perform time interval conversion so that the protective wind speed is consistent with the measured time interval of the historical wind speed.

3. The method for analyzing power generation of a photovoltaic tracking system according to claim 2, characterized in that: The time-distance conversion using the wind speed conversion coefficient specifically includes: The wind speed conversion coefficient is obtained by querying the wind speed time-distance conversion diagram, and the protection wind speed = the design wind speed of the photovoltaic tracking bracket ÷ the wind speed conversion coefficient.

4. The method for analyzing power generation of a photovoltaic tracking system according to any one of claims 1 to 3, characterized in that: The second time-sharing power generation data includes first wind direction time-sharing power generation data and second wind direction time-sharing power generation data; The first wind direction time-sharing power generation data is time-sharing power generation data when the photovoltaic assembly is in a docked position facing the first direction and the photovoltaic assembly is at a certain angle to the reference plane; The second wind direction time-sharing power generation data is time-sharing power generation data when the photovoltaic assembly is in a docked position facing the second direction and the photovoltaic assembly forms a certain angle with the reference plane.

5. The method for analyzing power generation of a photovoltaic tracking system according to claim 4, characterized in that: The angle between the photovoltaic module and the reference plane ranges from 0 to 60 degrees.

6. The method for analyzing power generation of a photovoltaic tracking system according to claim 5, characterized in that: The second time-sharing power generation data also includes horizontal time-sharing power generation data, which is the time-sharing power generation data when the photovoltaic tracker is in a horizontal parking position and the angle between the photovoltaic component and the reference plane is zero.

7. The method for analyzing power generation of a photovoltaic tracking system according to claim 6, characterized in that: The replacing the first time-sharing power generation data corresponding to the time period exceeding the protective wind speed with the second time-sharing power generation data in the corresponding time period and the corresponding wind direction specifically includes: When the photovoltaic tracker is in the preset strong wind protection mode and the photovoltaic module is docked at a certain angle to the reference surface: When the wind direction exceeding the protective wind speed is a first direction, selecting the first wind direction time-sharing power generation data of the time period to replace the first time-sharing power generation data of the corresponding time period; When the wind direction exceeding the protective wind speed is the second direction, the second wind direction time-sharing power generation data of the time period is selected to replace the first time-sharing power generation data of the corresponding time period.

8. The method for analyzing power generation of a photovoltaic tracking system according to claim 7, characterized in that: The replacing the first time-sharing power generation data corresponding to the time period exceeding the protective wind speed with the second time-sharing power generation data in the corresponding time period and the corresponding wind direction specifically includes: When the photovoltaic tracker is in the preset strong wind protection mode and the photovoltaic modules are parked flat: In a time period when the wind speed exceeds the protection wind speed, the horizontal time-sharing power generation data of the time period is selected to replace the first time-sharing power generation data of the corresponding time period.

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