Method for obtaining seasonal adjustable optimal angle through testing means

Abstract

The invention relates to the technical field of photovoltaic power generation, in particular to a method for obtaining a seasonal adjustable optimal angle through a test means. Establishing a test platform for testing the inclination angle of the photovoltaic module; the test platform is provided with a plurality of photovoltaic modules distributed in an equal-difference inclination angle mode, and the photovoltaic modules are connected with a test instrument. The test platform is used for monitoring at fixed time intervals to obtain the optimal inclination angle of the photovoltaic module in different time periods. The inclination angle of the photovoltaic module is adjusted through the fixed adjusting frequency, and then the generating capacity of the photovoltaic power station is improved. Generating capacity simulation is carried out according to meteorological data and irradiation data of a typical year, generating capacity data of various dip angles under a fixed adjustment frequency are obtained, a photovoltaic module dip angle combination scheme in each fixed time interval in the year is selected according to the optimal generating data, and then photovoltaic module dip angle adjustment of the adjustable support in each time period and season in the year is guided.

Description

Technical Field

[0001] The present invention relates to the technical field of photovoltaic power generation, and particularly relates to a method for obtaining an optimally adjustable angle by means of testing for each season. Background Art

[0002] The season-adjustable bracket adjusts the inclination angle of the photovoltaic module at a fixed adjustment frequency, thereby increasing the power generation of the photovoltaic power station. At present, the inclination angle of the photovoltaic module of the season-adjustable bracket is obtained by simulating the power generation based on the meteorological data and irradiation data of a typical year, obtaining the power generation data of various inclination angles at a fixed adjustment frequency, and selecting the inclination angle combination scheme of the photovoltaic module within each fixed time interval of the year according to the optimal power generation data, so as to guide the adjustment of the inclination angle of the photovoltaic module of the season-adjustable bracket at each time period within the year.

[0003] In the prior art, the inclination angle adjustment scheme of the photovoltaic module is obtained by simulating the representative year's meteorological data and irradiation data. However, in fact, the meteorological data and irradiation data vary greatly from year to year, and there are many factors affecting the power generation of the photovoltaic power station, such as environmental conditions, ground media, equipment performance, operation and maintenance level, and the front and back irradiation levels of the module. Determining the inclination angle of the photovoltaic module at each time period within the year only based on the representative year's meteorological data and irradiation data may not be the optimal inclination angle, and it is difficult to maximize the power generation of the photovoltaic power station. Summary of the Invention

[0004] In view of the above problems, the present invention provides a method for obtaining an optimally adjustable angle by means of testing for each season.

[0005] A method for obtaining an optimally adjustable angle by means of testing for each season, the method comprising:

[0006] Establishing a test platform for testing the inclination angle of the photovoltaic module; the test platform is provided with photovoltaic modules with a number of equally spaced inclination angles, and the photovoltaic modules are connected to test instruments;

[0007] Monitoring at fixed time intervals through the test platform to obtain the optimal inclination angle of the photovoltaic module at different time periods.

[0008] Further, the test platform is provided with photovoltaic modules with a number of equally spaced inclination angles, including:

[0009] Setting the inclination angles of a number of photovoltaic modules at equal intervals, and detecting the photovoltaic modules at different angles through the test instruments to determine the optimal inclination angle of the photovoltaic module.

[0010] Further, the test platform selects a five-row bracket scheme, and sets the inclination angles of the photovoltaic modules to be Q0, Q0±ΔN, Q0±2ΔN, Q0±3ΔN, Q0±4ΔN, a total of 9 angles; where Q0 is the reference angle and ΔN is the equal difference angle;

[0011] Each arranged component has two strings and is connected to one path of MPPT of the photovoltaic inverter.

[0012] Further, the test instrument includes: an IV tester for measuring current and voltage, an irradiance meter for measuring irradiance intensity, and a dust detector for detecting dust occlusion.

[0013] Further, monitoring is performed at fixed time intervals to obtain the optimal inclination angle of the photovoltaic module in different time periods, including:

[0014] At fixed intervals, through simulation and actual measurement, the current or voltage of photovoltaic modules with different inclination angles is monitored under the same conditions, and the inclination angle of the photovoltaic module with the maximum current or voltage output is used as the optimal inclination angle of the photovoltaic module in the current time period.

[0015] Further, the optimal inclination angle of the photovoltaic module is re-determined at fixed intervals and applied to the photovoltaic module.

[0016] The present invention at least has the following beneficial effects:

[0017] The present invention adjusts the inclination angle of the photovoltaic module at a fixed adjustment frequency, thereby realizing the improvement of the power generation of the photovoltaic power station. According to the meteorological data and irradiance data of a typical year, the power generation is simulated, and the power generation data of various inclination angles at the fixed adjustment frequency are obtained. According to the optimal power generation data, the inclination angle combination scheme of the photovoltaic module within each fixed time interval in a year is selected, and then the inclination angle adjustment of the photovoltaic module of the seasonally adjustable bracket in each time period in a year is guided.

[0018] Other features and advantages of the present invention will be described in the subsequent description, and part of them will be obvious from the description or understood by implementing the present invention. The objectives and other advantages of the present invention can be achieved and obtained through the structures pointed out in the description and the drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] In order to more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the following will briefly introduce the drawings required for the description of the embodiments or the prior art. Obviously, the following drawings are some embodiments of the present invention. For those of ordinary skill in the art, other drawings can be obtained based on these drawings without creative efforts.

[0020] Figure 1 It is a flowchart of the method in the embodiment of the present invention;

[0021] Figure 2 It is a layout diagram of the test platform;

[0022] Figure 3 It is a cross-sectional view of the test platform. DETAILED DESCRIPTION OF THE INVENTION

[0023] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention. Apparently, the described embodiments are some, but not all, of the embodiments of the present invention. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without creative efforts shall fall within the protection scope of the present invention.

[0024] In the prior art, for a seasonally adjustable bracket photovoltaic power station, more attention is paid to the structural reliability and adjustment convenience of the seasonally adjustable bracket itself. The inclination angle of the photovoltaic module is executed according to the requirements of the operation instruction manual or the data simulated by the design unit, and no feedback mechanism is formed. Whether the specified inclination angle is actually the optimal inclination angle cannot be verified.

[0025] For this reason, a method for obtaining the optimal seasonally adjustable angle through testing means. The present invention takes the inclination angle of the photovoltaic module simulated by the representative year meteorological data and irradiation data as a reference, and constructs a small test scheme. The inclination angle of the photovoltaic module in this scheme is continuously set at fixed intervals (usually 1°). Through observation for a period of time, the optimal inclination angle of the photovoltaic module at each time period within the year is obtained, and it is used to guide the adjustment of the seasonally adjustable bracket.

[0026] As Figure 1 shown, a method for obtaining the optimal seasonally adjustable angle through testing means, the method includes:

[0027] S101, establishing a test platform for testing the inclination angle of the photovoltaic module; the test platform is provided with photovoltaic modules with a number of equally spaced inclination angles, and the photovoltaic modules are connected with test instruments;

[0028] S102, monitoring through the test platform at fixed time intervals to obtain the optimal inclination angle of the photovoltaic module at different time periods.

[0029] During specific implementation, there are certain differences in the power generation amounts at different inclination angles. The optimal inclination angle of the photovoltaic module can be effectively obtained through the small test platform, which can guide the operation strategy of the seasonally adjustable bracket photovoltaic power station and increase the power generation income. There are many influencing factors for photovoltaic power generation. Designing a test platform within a small range can effectively reduce the influence of inconsistent boundary conditions on the test results. By installing a certain number of test devices, various factors' influence on the power generation amount can be more intuitively reflected, and the influencing factors can be quantified through analysis.

[0030] In one embodiment, the test platform is provided with photovoltaic modules with a number of equally spaced inclination angles, including:

[0031] Set the inclination angles of several photovoltaic modules at equal intervals, and use a testing instrument to detect the photovoltaic modules at different angles to determine the optimal inclination angle of the photovoltaic modules.

[0032] In one embodiment, a five-row support scheme is selected for the test platform, and the inclination angles of the photovoltaic modules are set to a total of 9 angles: Q0, Q0±ΔN, Q0±2ΔN, Q0±3ΔN, Q0±4ΔN; where Q0 is the reference angle and ΔN is the equal difference angle.

[0033] Each row of components has two strings and is connected to one MPPT of the photovoltaic inverter.

[0034] Specifically, taking a fixed time interval as a unit, the optimal inclination angle of the photovoltaic module within this time period can be obtained through simulation, that is, Q0 in the schematic diagram. As Figure 2 shown, by setting 8 inclination angles such as Q0±ΔN, Q0±2ΔN, Q0±3ΔN, Q0±4ΔN near Q0, the power generation levels at different inclination angles are measured. According to the inclination angles of the photovoltaic modules set above, the optimal adjustment angles within each time period can be obtained to guide the overall adjustment of the seasonally adjustable support scheme.

[0035] In one embodiment, the testing instrument includes: an IV tester for measuring current and voltage, an irradiance meter for measuring irradiance intensity, and a dust detector for detecting dust occlusion.

[0036] Specifically, when implementing, arrange testing instruments such as IV testers, irradiance meters, and dust in the test platform. Through continuous long-term monitoring, the influence of various factors on power generation can be obtained.

[0037] In one embodiment, monitoring is carried out at fixed time intervals to obtain the optimal inclination angle of the photovoltaic module within different time periods, including:

[0038] At fixed intervals, through simulation and actual measurement, the current or voltage of photovoltaic modules at different inclination angles is monitored under the same conditions, and the inclination angle of the photovoltaic module with the maximum current or voltage output is used as the optimal inclination angle of the photovoltaic module for the current time period.

[0039] In one embodiment, the optimal inclination angle of the photovoltaic module is re-determined at fixed intervals and applied to the photovoltaic module.

[0040] To enable those skilled in the art to better understand the present invention, the principle of the present invention is described below in conjunction with the accompanying drawings:

[0041] The present invention proposes a method for obtaining the optimal angle of a seasonally adjustable support for a photovoltaic module through testing means.

[0042] 1. Establish a small test platform

[0043] AsFigure 2 As shown, a five-row bracket scheme is selected, and the inclination angles of the photovoltaic modules are set to have a total of 9 angles: Q0, Q0±ΔN, Q0±2ΔN, Q0±3ΔN, and Q0±4ΔN. As Figure 3 shown, it is required that each row of modules has 2 strings and is connected to 1 MPPT of the photovoltaic inverter.

[0044] 2. Test Scheme Design

[0045] IV testers, irradiance meters, dust and other test instruments are arranged in the test platform. Through continuous long-term monitoring, the influence of various factors on power generation can be obtained.

[0046] 3. Form a Feedback Mechanism

[0047] Taking a fixed time interval as the unit, the optimal inclination angle of the photovoltaic module within this period can be obtained through simulation, that is, Q0 in the scheme diagram. By setting 8 inclination angles such as Q0±ΔN, Q0±2ΔN, Q0±3ΔN, and Q0±4ΔN near Q0, the power generation levels at different inclination angles are measured. According to the set inclination angles of the photovoltaic modules above, the optimal adjustment angles within each time period can be obtained to guide the overall adjustment of the seasonally adjustable bracket scheme.

[0048] There are certain differences in the power generation at different inclination angles. Through a small test platform, the optimal inclination angle of the photovoltaic module can be effectively obtained to guide the operation strategy of the seasonally adjustable bracket photovoltaic power station and increase the power generation income.

[0049] There are many factors affecting photovoltaic power generation. Designing a test platform in a small range can effectively reduce the influence of inconsistent boundary conditions on the test results.

[0050] By installing a certain number of test devices, the influence of various factors on power generation can be more intuitively reflected, and the influence factors can be quantified through analysis.

[0051] Adjust the inclination angle of the photovoltaic module at a fixed adjustment frequency to improve the power generation of the photovoltaic power station. According to the meteorological data and irradiance data of a typical year, the power generation is simulated to obtain the power generation data at various inclination angles under a fixed adjustment frequency. According to the optimal power generation data, select the inclination angle combination scheme of the photovoltaic module within each fixed time interval during the year, and then guide the adjustment of the inclination angle of the photovoltaic module of the seasonally adjustable bracket at each time period during the year.

[0052] Although the present invention has been described in detail with reference to the foregoing embodiments, those of ordinary skill in the art should understand that: they can still modify the technical solutions recorded in the foregoing embodiments, or perform equivalent replacements on some of the technical features; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. A method for obtaining the seasonally adjustable optimal angle through testing means, characterized in that, the method includes: establishing a test platform for testing the inclination angle of photovoltaic modules; the test platform is provided with photovoltaic modules with a number of equally spaced inclination angles, and the photovoltaic modules are connected with test instruments; monitoring through the test platform at fixed time intervals to obtain the optimal inclination angles of photovoltaic modules in different time periods.

2. The method for obtaining the seasonally adjustable optimal angle through testing means according to claim 1, characterized in that, the test platform is provided with photovoltaic modules with a number of equally spaced inclination angles, including: setting the inclination angles of a number of photovoltaic modules at equal intervals, and detecting the photovoltaic modules at different angles through test instruments to determine the optimal inclination angles of photovoltaic modules.

3. The method for obtaining the seasonally adjustable optimal angle through testing means according to claim 1, characterized in that, the test platform selects a five-row support scheme, and sets the inclination angles of photovoltaic modules to be Q0, Q0±ΔN, Q0±2ΔN, Q0±3ΔN, Q0±4ΔN, a total of 9 angles; where Q0 is the reference angle and ΔN is the equal difference angle; each row of components has two strings and is connected to one path of MPPT of the photovoltaic inverter.

4. The method for obtaining the seasonally adjustable optimal angle through testing means according to claim 1, characterized in that, the test instruments include: an IV tester for measuring current and voltage, an irradiance meter for measuring irradiance intensity, and a dust detector for detecting dust occlusion.

5. The method for obtaining the seasonally adjustable optimal angle through testing means according to claim 1, characterized in that, monitoring through the test platform at fixed time intervals to obtain the optimal inclination angles of photovoltaic modules in different time periods, including: at fixed intervals, through simulation and actual measurement, monitoring the current or voltage of photovoltaic modules at different inclination angles under the same conditions, and taking the inclination angle of the photovoltaic module with the maximum current or voltage output as the optimal inclination angle of the photovoltaic module in the current time period.

6. The method for obtaining the seasonally adjustable optimal angle through testing means according to claim 1, characterized in that, re-determining the optimal inclination angle of the photovoltaic module at fixed intervals and applying the optimal inclination angle of the photovoltaic module to the photovoltaic module.

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