航天器大功率并网控制技术研究

Research on high power bus interconnection control technology for spacecraft

中国空间站各舱段均有各自独立的电源系统,为了解决由于阳光遮挡效应导致部分舱段供电能力不足问题,提出了通过配置大功率并网控制单机——并网控制器的并网供电方案。高压大功率模块化并网控制器采用四相交错双管正激高压拓扑技术、恒压恒流双环控制技术、最大电流并联均流技术、输出数字调节技术及故障检测、隔离和恢复(Failure Detection Isolation and Recovery,FDIR)技术,可以实现中国空间站舱段之间及与飞船之间功率4kW并网供电,并通过了试验验证。

Each module of China Space Station has its own power system.Due to the sunshade effect,some modules can be in the state of power shortage.To solve this problem,the scheme of using electrically isolated high power supplement controller(PSC)is proposed.The PSC is modularly designed with basic converter unit(CU),the output capacity of PSC can be increased by CU parallel.This paper mainly describes the power bus electrically isolated conversion topology,double-loop of constant voltage and constant current control,maximum current sharing control,output digital regulation,and the design of Fault detection,Isolation and Recovery(FDIR).On this basis,PSC realizes high reliability power supply between different modules of China Space Station with the 4 kW power level,and the scheme is proved by the experimental results.