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• 空间探测技术 • Previous Articles     Next Articles

Analysis and Calculation for Current Leakage Effect of High Voltage Solar Array in LEO

SHI Liqin1,2, LIU Siqing2, ZHENG Huinan1   

  1. 1. School of Earth and Space Sciences, University of Science and Technology of China, Hefei 230026;
    2. Center for Space Science and Applied Research, Chinese Academy of Sciences, Beijing 100190
  • Received:2011-01-10 Revised:2011-09-13 Online:2012-01-15 Published:2012-01-15

Abstract: A method for calculating current leakage effect of high voltage solar array in LEO was developed in this paper. This method is based on current balance, a simplified structure of solar array and an empirical model of current collection for solar array. Using this method, the relationships between power loss and plasma environment, solar array voltage, the area of solar array exposed conductor were analyzed in current leakage. The main results are concluded as follows. Firstly, the power loss of solar array in current leakage declines quickly with the increasing of orbital altitude. The most serious range for current leakage is region among 300~400 km of orbital altitude where the plasma density is high. Secondly, the power loss increases exponentially with the voltage of solar array. Meanwhile, is also noticed that the power loss is far less than 1% of total power when the voltage of solar array is below 200 V. Thirdly, the power loss increases linearly with the area of solar array exposed conductor. Accordingly, the current leakage effect can be reduced by decreasing the area of solar array exposed conductor.

CLC Number: