低轨大功率电源系统的设计研究

Design and research of low orbit high power system

随着低轨卫星应用领域的不断深化,载荷功率随之增加,平台功率降额十分有限。针对低轨卫星的功耗不断增加,提出了一种新的电源系统设计方案,包括采用双母线机制,平台为全调节母线,载荷为不调节母线,两条母线独立设计,大大降低了PCU单机热耗,提高了电源系统的充放电效率;并对系统的热处理和放电不均衡度进行了可靠性分析,延长了系统的在轨使用寿命。通过软件仿真及在轨验证,这种设计既能保证平台母线稳定输出,又能保证载荷的大功率供电需求,还可以提高电源系统在轨服役的可靠性。这种设计方案对后续低轨大功率卫星电源系统的设计有一定的指导意义。

with the continuous deepening of the application field of LEO satellites,the load power increases,and the derating of platform power is very limited.In view of the increasing power consumption of LEO satellites,a new power system design scheme was proposed in this paper,including the use of double bus mechanism,a fully regulated bus platform,a non regulated bus load,and two separately designed buses,which greatly reduced the heat consumption of PCU and improved the charge and discharge efficiency of the power system;the reliability analysis of heat treatment and discharge imbalance of the system was carried out to prolong the on orbit service life of the system.Through software simulation and on orbit verification,this design can not only ensure the stable output of platform bus,but also ensure the high-power power supply demand of load and improve the reliability of on orbit service of power supply system.This design scheme has certain guiding significance for the subsequent design of low orbit high-power satellite power system.