| Citation: | LI Tao, LI Wei, YANG Leiet al. A calculation method for power supply capability of spacecraft solar array[J]. Journal of Beijing University of Aeronautics and Astronautics, 2017, 43(7): 1355-1363. doi: 10.13700/j.bh.1001-5965.2016.0600(in Chinese)
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The solar array supplies power to spacecraft. Thus, it is important to predict power supply capability for spacecraft design and certification of on-orbit flight operation, and a calculation method for power supply capability of spacecraft solar array is proposed. The current versus voltage model of photovoltaic cell under standard test condition (STC) was developed using a group of ground test data, and then the parameters of the model such as photon current, cell series resistance, and cell shunt resistance were adapted to on-orbit irradiation intensity, temperature and shadow. According to Kirchhoff law, the outputs of photovoltaic cell working voltage, current, bypass diodes and block diodes in solar array were obtained, and the model of photovoltaic array was built. Simulation was performed for a typical spacecraft. Results show that this method is applicable to photovoltaic array power capability analysis under arbitrary irradiation intensity, temperature and shadow pattern, the influence of bypass diode and block diode in the solar array is analyzed accurately, and calculation accuracy is improved by 20% compared to traditional method.
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