卫星S3R功率调节电源系统稳定性分析

针对大功率脉冲型负载应用造成的卫星电源系统运行不稳定问题,依据稳定性阻抗判据,建立以顺序开关分流调节器(S3R)为拓扑的电源系统在正常工作状态时输出阻抗的小信号模型。通过仿真对输出阻抗的影响因素进行分析,采用注入电信号的方法测量卫星电源系统的输出阻抗,并在小卫星平台上进行测试验证。结果表明,通过测试能够有效地获得电源系统的输出阻抗,并可由此确定卫星平台电源系统的稳定性指标要求。

Stability Analysis of S3R Electrical Power System on Satellite

Application of high-power impulse loads on satellite has an influence on stability of electrical power system,so the stability study for electrical power system on satellite is proposed.On the basis of stability criterion,this paper establishes a small signal model of output impedance under normal condition and analyzes the expressions and influencing factors of S3R （sequential switching shunt regulator） electrical power system output impedance by simulation.A signal disturbance source is injected to electrical power system in order to obtain the output impedance of electrical power system,which has been verified on small satellite platform.The results show that the output impedance can be achieved effectively in the test and then can be used to determine the stability requirements of electrical power system.