地影期GSO卫星一次电源供电分析

Analysis of the Primary Power Supply System of a GSO Satellite in Eclipse Seasons

严密监视卫星能源系统在地影期的工作状态对卫星安全至关重要。为了评估国内某GSO(地球同步轨道)卫星能源分系统在地影期的工作状态,根据电压、电流变化分析,给出了一次电源在进出地影阶段的工作过程,计算得到了蓄电池组电容量、充放电比和放电深度在地影期的变化曲线。结果表明:充电容量、放电容量和放电深度在地影期随日期推移先增大再减小,在秋分/春分时达到最大值;充放电比在地影期间则几乎保持稳定。本文工作及结论可为后续地影期能源监视提供参考依据。

Monitoring of the operational status of the power supply system of a satellite in eclipse seasons is extreme- ly important to its safety. The operational process of the primary power supply system of a domestic GSO （Geosta- tionary Orbit） satellite is analyzed based on variation of voltage and current in an eclipse period. The charge and dis- charge capacity, ratio of charge to discharge capacity and discharge depth of the battery system of the satellite is computed. The results show that charge capacity, discharge capacity and discharge depth increases first and then de- creases in eclipse seasons and reach the maximum on autumnal/vernal equinox while the ratio of charge to discharge capacity is relatively stable. The conclusions in the paper can be used as reference in future monitoring of the power supply system of satellites in eclipse seasons.