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[ Instrument R & D of Instrument Network ] use solar cell tester to test the solar cell sheet to obtain IV measured data, and perform IV curve fitting according to the measured data to obtain the corresponding combined curve and mathematical expression, which can be used to judge the solar cell sheet It is an important reference basis for performance. It is reported that for the measurement of IV characteristic curves of various high-efficiency solar cells, the Fujian Provincial Metrology Research Institute / National Photovoltaic Industry Metrology Test Center has developed the S180-A steady-state solar simulator.
The basic principle of the solar simulator is to use artificial light sources to simulate solar radiation in order to overcome the shortcomings of solar radiation affected by time and climate, and the total irradiance cannot be adjusted. It is widely used in aerospace, photovoltaic, agriculture and other fields.
The S180-A steady-state solar simulator developed by Fujian Institute of Metrology has a spectral distribution range of (300 ~ 1200) nm. According to the IEC 60904-9: 2007 standard and IEC60904-9: Ed.3 (Draft), the evaluation is AAA level: Irradiation spot is 180cmX180cm, under the assessment spot size is 160cmX 160cm, the worst spectral matching band is not more than ± 12.5%, the irradiance spatial unevenness is not more than 2%, and the irradiance time instability is not more than 1% (Within 1 hour).
The S180-A steady-state solar simulator uses a steady-state lamp, and the lamp power does not exceed 700W when the irradiance is 1000W / m and reaches the AAA level, which effectively reduces the heat of the equipment and extends the lamp life; it promises to maintain AAA performance for a long time Less than 1500 hours. The irradiance time instability within one hour does not exceed 1%, which effectively improves the measurement repeatability of high-efficiency solar cell calibration.
In addition, the divergence angle of the outgoing light does not exceed 2.5 °, which is higher in collimation than the general solar simulator, which is beneficial to the adjustment of irradiance. The irradiance range of the S180-A steady-state solar simulator is (800 ~ 1200) W / m (by adjusting the cylinder lamp power). Equipped with electronically controlled shutter, the solar cell can close the shutter to avoid overheating of the solar cell when it is not in the IV curve measurement state; it is equipped with a 50% light attenuator to facilitate the measurement of the battery's resistance parameters.
The institute conducts photovoltaic research on solar simulated light source products, to a certain extent, it can avoid the purchase of high-priced non-3A solar simulators. In addition, its experimental effect is only similar to or less than that of solar simulated light sources, which will cause serious research funding. waste! Solar energy is an ideal clean energy for people in the future. Let us work together to create a better tomorrow for mankind. Jointly developed a good solar simulator. The steady-state solar simulator of Fujian Provincial Institute of Metrology Research and the temperature-controlled measurement platform can effectively eliminate the capacitance effect of HIT, PERC, TOPcont, N-type single crystal and other high-efficiency solar cells to achieve accurate IV characteristic curve measurement.