Light source radiation simulation method and system of solar simulator

Abstract

The invention relates to the technical field of photovoltaic radiation simulation, and discloses a light source radiation simulation method and system of a solar simulator. According to the method and system, intelligent control over the light source system and the test platform is achieved through the industrial personal computer, the stability and repeatability of the illumination condition are ensured, the performance of the photovoltaic device under different illumination conditions is evaluated in real time, the integrated control system can effectively process the irradiation stability test, and the reliability of the photovoltaic device is improved. A short-arc xenon lamp is adopted as a light source, an AM1.5 optical filter is arranged, spectral distribution can be effectively adjusted, it is ensured that light output by the light source is close to the characteristic of natural sunlight, uniform irradiance distribution is formed, and the accuracy and reliability of testing are improved. The test environment simulation effect of the photovoltaic device is enhanced, the photovoltaic device can be comprehensively evaluated by using the portable photovoltaic efficiency tester and the rotatable test platform, and the accuracy of the light source simulation radiation test is improved.

Description

Technical Field

[0001] The present invention relates to the technical field of light source radiation simulation, and in particular to a light source radiation simulation method and system for a solar simulator. Background Art

[0002] With the rapid development of renewable energy technology, photovoltaic power generation, as an important form of renewable energy, has received widespread attention and application. The performance evaluation of solar photovoltaic devices usually requires simulating the radiation characteristics of natural sunlight to accurately reflect the actual performance of solar cells under different lighting conditions. However, traditional solar radiation testing methods usually rely on actual natural light conditions, which are affected by uncertainties such as weather changes, seasonal factors, and geographical location, resulting in inconsistent test results and errors in the performance evaluation of photovoltaic devices. Summary of the Invention

[0003] (1) Technical problems solved

[0004] In response to the shortcomings of the existing technology, the present invention provides a light source radiation simulation method and system for a solar simulator, which is capable of realizing intelligent control of the light source system and test platform through an industrial computer, not only ensuring the stability and repeatability of the lighting conditions, but also being able to record and analyze test data in real time, and evaluate the performance of photovoltaic devices under different lighting conditions. This integrated control system can effectively handle irradiation stability tests, calculate the irradiance change rate, fluctuation amplitude and standard deviation, thereby improving the accuracy and reliability of the test. A short arc xenon lamp is used as the light source and is equipped with an AM1.5 filter, which can effectively adjust the spectral distribution to ensure that the light output by the light source is close to the characteristics of natural daylight, forming a uniform irradiance distribution. This design not only improves the radiation intensity and stability of the light source, but also enhances the test environment simulation effect of the photovoltaic device. The use of a portable photovoltaic efficiency tester and a rotatable test platform can achieve a comprehensive evaluation of the photovoltaic device, simulate the actual movement trajectory of the sun, and provide strong data support for the research and development and optimization of photovoltaic devices, thereby solving the above-mentioned problems.

[0005] (2) Technical solution

[0006] To achieve the above object, the present invention provides the following technical solution: a method for simulating radiation from a light source of a solar simulator, comprising the following steps:

[0007] S1. Control the rotation of the light source system and test platform through the industrial computer, store test data, calculate system delay and data storage capacity, record irradiance change data during irradiation stability testing, and calculate the irradiance change rate, fluctuation amplitude and standard deviation. Control the angle setting and movement posture of the test platform in real time, and display the azimuth and pitch angles. Record test data in real time, perform data analysis, and evaluate the performance of photovoltaic devices under different lighting conditions.

[0008] S2. Select a short-arc xenon lamp as the light source, install and debug it, calculate the relative radiant intensity of the light source, select an AM1.5 filter, install the filter in the light path to filter the light emitted by the light source, adjust the spectral distribution, calculate the transmittance of the filter, and design the light path to ensure that the light source beam passes through the condenser, filter, and optical integrator to form a uniform irradiance distribution;

[0009] S3. Measure the irradiance at different points on the irradiation surface, calculate the irradiation unevenness, test the photovoltaic devices using a portable photovoltaic efficiency tester, record the photovoltaic curve and photoelectric conversion efficiency, and use a rotatable test platform to simulate the sun's rising and setting phenomenon, adjust the incident angle of the light source, and provide motion and angle control.

[0010] Preferably, the formula for calculating the system delay of S1 is as follows:

[0011] T d =T control +T response

[0012] In the formula, T d represents the system delay, T control It represents the transmission time of the control signal to the test platform, T response Indicates the response time of the test platform to the control signal.

[0013] Preferably, the formula for calculating the data storage capacity in S1 is as follows:

[0014] Ccrl=Clsc*Zjsl

[0015] In the formula, Ccrl represents the data storage capacity, Clsc represents the number of recorded data points, and Zjsl represents the number of bytes per data point.

[0016] Preferably, the formula for calculating the irradiance change rate in S1 is as follows:

[0017]

[0018] In the formula, R represents the rate of change of irradiance, E(t1) represents the irradiance at time point t1, and E(t2) represents the irradiance at time point t2.

[0019] Preferably, the formula for calculating the fluctuation amplitude of S1 is as follows:

[0020] Bdfd=max(E)-min(E)

[0021] In the formula, Bdfd represents the fluctuation amplitude, max(E) represents the maximum irradiance during the measurement period, and min(E) represents the minimum irradiance during the measurement period.

[0022] Preferably, the formula for calculating the standard deviation of S1 is as follows:

[0023]

[0024] In the formula, Bc represents the standard deviation, N represents the number of measurement points, and E i represents the irradiance at the i-th measurement point, Indicates the average value of the measured irradiance.

[0025] Preferably, the formula for calculating the relative radiation intensity of the light source in S2 is as follows:

[0026]

[0027] In the formula, Xdqd represents the relative radiation intensity of the light source, Fsgl represents the radiation power at the test wavelength, and Zfsl represents the total radiation power emitted by the light source.

[0028] Preferably, the formula for calculating the light transmittance of the filter in S2 is as follows:

[0029]

[0030] In the formula, Lgtl represents the transmittance of the filter, Tsgq represents the intensity of the transmitted light after passing through the filter, and Rsxl represents the intensity of the light incident on the filter.

[0031] Preferably, the formula for calculating the irradiation non-uniformity in S3 is as follows:

[0032]

[0033] In the formula, N u Represents the irradiation non-uniformity value, E max It represents the maximum value of the detector measured at any specified point in the test plane during data acquisition, E min It represents the minimum value measured by the detector at any specified point in the test plane during data acquisition.

[0034] A solar simulator light source radiation simulation system includes an industrial computer module, a light source system module and a test platform module;

[0035] The industrial computer module controls the rotation of the light source system and the test platform through the industrial computer, stores test data, calculates system delay and data storage capacity, records irradiance change data during irradiation stability testing, and calculates the irradiance change rate, fluctuation amplitude and standard deviation, controls the angle setting and movement posture of the test platform in real time, and displays the azimuth and pitch angles, records test data in real time, performs data analysis, and evaluates the performance of photovoltaic devices under different lighting conditions;

[0036] The light source system module selects a short arc xenon lamp as the light source, calculates the relative radiation intensity of the light source, selects an AM1.5 filter, installs the filter in the light path to filter the light emitted by the light source, adjusts the spectral distribution, calculates the transmittance of the filter, and designs the light path to ensure that the light source beam passes through the condenser, filter, and optical integrator to form a uniform irradiance distribution;

[0037] The test platform module measures the irradiance at different points on the irradiation surface, calculates the irradiation unevenness, uses a portable photovoltaic efficiency tester to test photovoltaic devices, records photovoltaic curves and photoelectric conversion efficiency, and uses a rotatable test platform to simulate the sun's rising and setting phenomenon, adjust the incident angle of the light source, and provide motion and angle control.

[0038] Compared with the prior art, the present invention provides a method and system for simulating light source radiation of a solar simulator, which has the following beneficial effects:

[0039] The present invention realizes intelligent control of the light source system and test platform through an industrial computer, which not only ensures the stability and repeatability of the lighting conditions, but also can record and analyze test data in real time and evaluate the performance of photovoltaic devices under different lighting conditions. This integrated control system can effectively process irradiation stability tests, calculate the irradiance change rate, fluctuation amplitude and standard deviation, thereby improving the accuracy and reliability of the test. It uses a short arc xenon lamp as a light source and is equipped with an AM1.5 filter. It can effectively adjust the spectral distribution to ensure that the light output by the light source is close to the characteristics of natural daylight and form a uniform irradiance distribution. This design not only improves the radiation intensity and stability of the light source, but also enhances the test environment simulation effect of photovoltaic devices. Using a portable photovoltaic efficiency tester and a rotatable test platform, it can achieve a comprehensive evaluation of photovoltaic devices, simulate the actual movement trajectory of the sun, provide strong data support for the research and development and optimization of photovoltaic devices, and improve the accuracy of light source simulation radiation testing. BRIEF DESCRIPTION OF THE DRAWINGS

[0040] Figure 1 Schematic diagram of the steps of the method of the present invention;

[0041] Figure 2 Schematic diagram of the system flow of the present invention. DETAILED DESCRIPTION

[0042] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. 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 making creative efforts are within the scope of protection of the present invention.

[0043] Traditional solar radiation testing methods usually rely on actual natural light conditions, which are affected by uncertainties such as weather changes, seasonal factors, and geographical location, leading to inconsistent test results and errors in photovoltaic device performance evaluation. To this end, a solar simulator light source radiation simulation method is proposed. Figure 1 , the method comprises the following steps:

[0044] S1. Control the rotation of the light source system and test platform through the industrial computer, store test data, calculate system delay and data storage capacity, record irradiance change data during irradiation stability testing, and calculate the irradiance change rate, fluctuation amplitude and standard deviation. Control the angle setting and movement posture of the test platform in real time, and display the azimuth and pitch angles. Record test data in real time, perform data analysis, and evaluate the performance of photovoltaic devices under different lighting conditions.

[0045] The formula for calculating system latency is as follows:

[0046] T d =T control +T response

[0047] Calculating system delay helps evaluate the response time of the light source system and the test platform, thereby determining the real-time performance of the system under changing lighting conditions. This is very important for optimizing the test process and ensuring the coordination between the light source and the test data collection in real-time control. In the formula, T d represents the system delay, T control It represents the transmission time of the control signal to the test platform, T response Indicates the test platform's response time to control signals. By monitoring the delay, possible system faults can be quickly identified and located, improving system reliability.

[0048] The formula for calculating data storage capacity is as follows:

[0049] Ccrl=Clsc*Zjsl

[0050] Evaluating data storage capacity ensures that the system will not be interrupted due to insufficient storage during long experiments. Proper storage space planning is particularly important under high-frequency sampling conditions. In the formula, Ccrl represents the data storage capacity, Clsz represents the number of recorded data points, and Zjsl represents the number of bytes per data point. By calculating storage requirements in advance, experimental data can be organized and managed more effectively, facilitating subsequent data analysis and mining.

[0051] The formula for calculating the irradiance change rate is as follows:

[0052]

[0053] Calculating the irradiance change rate can help monitor the stability of light source output in real time and promptly detect and adjust output deviations. In the formula, R represents the irradiance change rate, E(t1) represents the irradiance at time point t1, and E(t2) represents the irradiance at time point t2. By analyzing the change rate, the consistency of the test results can be verified, thereby improving the reliability of the experiment.

[0054] The formula for calculating the fluctuation range is as follows:

[0055] Bdfd=max(E)-min(E)

[0056] The calculation of the fluctuation amplitude helps evaluate the stability of the light source output. A smaller fluctuation amplitude means a more uniform light source output and a better simulation of the characteristics of natural light. In the formula, Bdfd represents the fluctuation amplitude, max(E) represents the maximum irradiance during the measurement period, and min(E) represents the minimum irradiance during the measurement period. By analyzing the fluctuation amplitude, we can better design experimental conditions to ensure a consistent lighting environment for each test.

[0057] The formula for calculating standard deviation is as follows:

[0058]

[0059] The calculation of standard deviation can be used to evaluate the consistency of multiple measurement results. A smaller standard deviation indicates a high degree of data concentration and a stable test process. In the formula, Bc represents the standard deviation, N represents the number of measurement points, and E represents the number of measurement points. i represents the irradiance at the i-th measurement point, It represents the average value of the measured irradiance. The standard deviation is an important indicator of quality control. By monitoring the changes in the standard deviation, the experimental conditions can be adjusted in time to maintain the high quality standards of the experiment.

[0060] S2. Select a short-arc xenon lamp as the light source, install and debug it, calculate the relative radiant intensity of the light source, select an AM1.5 filter, install the filter in the light path to filter the light emitted by the light source, adjust the spectral distribution, calculate the transmittance of the filter, and design the light path to ensure that the light source beam passes through the condenser, filter, and optical integrator to form a uniform irradiance distribution;

[0061] The formula for calculating the relative radiant intensity of a light source is as follows:

[0062]

[0063] By calculating the relative radiant intensity of the light source, you can choose the light source that best simulates the solar spectrum to ensure the scientific nature of the test. In the formula, Xdqd represents the relative radiant intensity of the light source, Fsgl represents the radiant power at the test wavelength, and Zfsl represents the total radiant power emitted by the light source. Understanding the radiant intensity of light sources in different wavelength bands helps adjust the optical path design and improve lighting uniformity.

[0064] The formula for calculating the filter transmittance is as follows:

[0065]

[0066] The transmittance calculation can evaluate the effect of the filter on the spectrum and ensure that the simulated spectrum meets actual needs. In the formula, Lgtl represents the transmittance of the filter, Tsgq represents the intensity of the transmitted light after the filter, and Rsxl represents the intensity of the light incident on the filter. By evaluating the transmittance, we can better select the appropriate filter and avoid the cost increase caused by using inappropriate materials.

[0067] S3. Measure the irradiance at different points on the irradiation surface, calculate the irradiation unevenness, test the photovoltaic devices using a portable photovoltaic efficiency tester, record the photovoltaic curve and photoelectric conversion efficiency, and use a rotatable test platform to simulate the sun's rising and setting phenomenon, adjust the incident angle of the light source, and provide motion and angle control;

[0068] The formula for calculating irradiation non-uniformity is as follows:

[0069]

[0070] Calculating the irradiation non-uniformity can help confirm whether the light distribution on the irradiated surface is uniform, which is crucial for the performance test of photovoltaic devices. In the formula, N u Represents the irradiation non-uniformity value, E max It represents the maximum value of the detector measured at any specified point in the test plane during data acquisition, E minIt represents the minimum measurement value of the detector at any specified point in the test plane during data acquisition. By analyzing the irradiation non-uniformity, it can guide further equipment design and optimization and improve the overall system performance.

[0071] See also Figure 2 , a light source radiation simulation system of a solar simulator, including an industrial computer module, a light source system module and a test platform module;

[0072] The industrial computer module controls the rotation of the light source system and the test platform through the industrial computer, stores test data, calculates system delay and data storage capacity, records irradiance change data during irradiation stability testing, and calculates the irradiance change rate, fluctuation amplitude and standard deviation, controls the angle setting and movement posture of the test platform in real time, and displays the azimuth and pitch angles, records test data in real time, performs data analysis, and evaluates the performance of photovoltaic devices under different lighting conditions;

[0073] The light source system module selects a short arc xenon lamp as the light source, calculates the relative radiation intensity of the light source, selects an AM1.5 filter, installs the filter in the light path to filter the light emitted by the light source, adjusts the spectral distribution, calculates the transmittance of the filter, and designs the light path to ensure that the light source beam passes through the condenser, filter, and optical integrator to form a uniform irradiance distribution;

[0074] The test platform module measures the irradiance at different points on the irradiation surface, calculates the irradiation unevenness, uses a portable photovoltaic efficiency tester to test photovoltaic devices, records photovoltaic curves and photoelectric conversion efficiency, and uses a rotatable test platform to simulate the sun's rising and setting phenomenon, adjust the incident angle of the light source, and provide motion and angle control.

[0075] Through the application of the above-mentioned method and system, a comprehensive evaluation of photovoltaic devices can be achieved, the actual movement trajectory of the sun can be simulated, strong data support can be provided for the research and development and optimization of photovoltaic devices, and the accuracy of light source simulation radiation testing can be improved.

[0076] While embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions, and variations may be made to these embodiments without departing from the principles and spirit of the invention, and that the scope of the invention is defined by the appended claims and their equivalents.

Claims

1. A method for simulating radiation from a light source of a solar simulator, characterized in that: The following steps are involved: S1. Control the rotation of the light source system and the test platform through the industrial computer, store the test data, calculate the system delay and data storage capacity, record the irradiance change data during the irradiation stability test, and calculate the irradiance change rate, fluctuation amplitude and standard deviation, control the angle setting and movement posture of the test platform in real time, and display the azimuth and pitch angles, record the test data in real time, perform data analysis, and evaluate the performance of photovoltaic devices under different lighting conditions; S2. Select a short arc xenon lamp as the light source, install and debug it, calculate the relative radiation intensity of the light source, select an AM1.5 filter, install the filter in the light path to filter the light emitted by the light source, adjust the spectral distribution, calculate the transmittance of the filter, design the light path, and ensure that the light source beam passes through the condenser, filter and optical integrator to form a uniform irradiance distribution; S3. Measure the irradiance at different points on the irradiation surface, calculate the irradiation unevenness, use a portable photovoltaic efficiency tester to test the photovoltaic devices, record the photovoltaic curve and photoelectric conversion efficiency, and use a rotatable test platform to simulate the phenomenon of the sun rising in the east and setting in the west, adjust the incident angle of the light source, and provide motion and angle control.

2. The method for simulating radiation of a light source of a solar simulator according to claim 1, characterized in that: The formula for calculating the S1 system delay is as follows: T d =T control +T response In the formula, T d Represents system delay, T control It represents the transmission time of the control signal sent to the test platform, T response Indicates the response time of the test platform to the control signal.

3. The method for simulating radiation of a light source of a solar simulator according to claim 2, characterized in that: The formula for calculating the data storage capacity of S1 is as follows: Ccrl=Clsc*Zjsl In the formula, Ccrl represents the data storage capacity, Clsc represents the number of recorded data points, and Zjsl represents the number of bytes for each data point.

4. The method for simulating radiation of a light source of a solar simulator according to claim 3, characterized in that: The formula for calculating the irradiance change rate of S1 is as follows: In the formula, R represents the irradiance change rate, E(t1) represents the irradiance at time point t1, and E(t2) represents the irradiance at time point t2.

5. The method for simulating radiation of a light source of a solar simulator according to claim 4, characterized in that: The formula for calculating the fluctuation range of S1 is as follows: Bdfd=max(E)-min(E) In the formula, Bdfd represents the fluctuation amplitude, max(E) represents the maximum irradiance during the measurement period, and min(E) represents the minimum irradiance during the measurement period.

6. The method for simulating radiation of a light source of a solar simulator according to claim 5, characterized in that: The formula for calculating the standard deviation of S1 is as follows: In the formula, Bc represents the standard deviation, N represents the number of measurement points, and E i represents the irradiance at the i-th measurement point, Represents the average value of the measured irradiance.

7. The method for simulating radiation from a light source of a solar simulator according to claim 6, characterized in that: The formula for calculating the relative radiation intensity of the light source by S2 is as follows: In the formula, Xdqd represents the relative radiation intensity of the light source, Fsgl represents the radiation power at the test wavelength, and Zfsl represents the total radiation power emitted by the light source.

8. The method for simulating radiation of a light source of a solar simulator according to claim 7, characterized in that: The formula for calculating the transmittance of the filter S2 is as follows: In the formula, Lgtl represents the transmittance of the filter, Tsgq represents the intensity of the transmitted light after passing through the filter, and Rsxl represents the intensity of the light incident on the filter.

9. The method for simulating radiation from a light source of a solar simulator according to claim 8, characterized in that: The formula for calculating the irradiation non-uniformity of S3 is as follows: In the formula, N u Represents the irradiation non-uniformity value, E max It represents the maximum value of the detector measured at any specified point in the test plane during data acquisition, E min Represents the minimum value measured by the detector at any specified point in the test plane during data acquisition.

10. A light source radiation simulation system for a solar simulator, characterized in that: Including industrial computer module, light source system module and test platform module; The industrial computer module controls the rotation of the light source system and the test platform through the industrial computer, stores test data, calculates system delay and data storage capacity, records irradiance change data during irradiation stability test, calculates irradiance change rate, fluctuation amplitude and standard deviation, controls the angle setting and motion posture of the test platform in real time, displays azimuth and pitch angle, records test data in real time, performs data analysis, and evaluates the performance of photovoltaic devices under different lighting conditions; The light source system module selects a short arc xenon lamp as the light source, calculates the relative radiation intensity of the light source, selects an AM1.5 filter, installs the filter in the light path to filter the light emitted by the light source, adjusts the spectral distribution, calculates the transmittance of the filter, designs the light path, and ensures that the light source beam passes through the condenser, filter and optical integrator to form a uniform irradiance distribution; The test platform module measures the irradiance at different points on the irradiation surface, calculates the irradiation unevenness, uses a portable photovoltaic efficiency tester to test photovoltaic devices, records photovoltaic curves and photoelectric conversion efficiency, and simulates the phenomenon of the sun rising in the east and setting in the west through a rotatable test platform, adjusts the incident angle of the light source, and provides motion and angle control.

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