ZDPS-1A卫星电源系统设计与在轨验证

为满足“皮星一号A”（ZDPS-1A）卫星微小型化的要求,提出一种新型电源系统的设计方案.通过采用三结砷化镓（Tri-Junction GaInP2/GaAs/Ge）太阳能电池、锂离子蓄电池等高效、轻型器件和在功率转换、分配电路中大量应用工业级集成电路芯片,以提高卫星功率和电源系统效率.通过简化供配电电路结构,合理规划工作模式,以提高电源系统的可靠性.建立基于Matlab/Simulink的能量平衡仿真系统,以研究卫星的能量平衡.分析卫星电源系统近一年的在轨数据、地面测试数据和仿真数据,结果表明：仿真得到太阳能电池输出平均功率为3.7 W,在轨输出平均功率高于4.5 W,电力充足、储能性能稳定；锂离子电池组功能正常,但工作电压长期高于母线电压设计最大值（4.2 V）,内阻逐渐增加,储能性能随时间下降；各系统负载长期工作后功率有所上升,但整星仍然能够保持能量平衡.

Design and on-orbit verification of ZDPS-1A power system

A new scheme of the power system was proposed in order to meet the microminiaturization need of ZDPS-1A. To improve the power level of the satellite and to obtain a high efficiency power system, high efficient and high-tech devices such as GaInP2/GaAs/Ge solar cells, Li-ion batteries were adopted, and industrial power management ICs were widely used in the design of the power conversion and distribution circuit. Besides, the electric system was optimized and the operation mode of the satellite was reasonably planned to improve the reliability of the power system. Furthermore, a simulation model of the power system based on Matlab/Simulink was established to study the energy balance performance of the satellite. Analysis of the simulation, ground test and on orbit data for nearly one year of the power system, show that the solar cells can output 3.7 W in the case of simulation and 4.5 W under actual operating conditions, that the performance of the battery has deteriorated along time, and that the power dissipation of some loads has increased along time while the energy balance of the satellite is sustained.