一次母线高阻接地对航天器电性能影响分析  

Influences Analysis of High-impedance Grounding of Primary Bus on Spacecraft Electrical Performance

作　　者：李海津 林文立[1] 付林春[1] 林海淼 张晓峰[1] 刘治钢[1] 朱立颖[1] LI Haijin;LIN Wenli;FU Linchun;LIN Haimiao;ZHANG Xiaofeng;LIU Zhigang;ZHU Liying(Beijing Institute of Spacecraft System Engineering, Beijing 100094, China)

机构地区：[1]北京空间飞行器总体设计部,北京100094

出　　处：《航天器工程》2021年第5期66-75,共10页Spacecraft Engineering

基　　金：国家自然科学基金(52007007)。

摘　　要：为了减少航天器一次母线正线对结构或机壳短路故障而影响整个航天器供电安全的风险,对现有的一次母线回线高阻接地和设备机壳高阻接地方案进行比较,分析其对短路电流、安全间距、电气隔离、电磁兼容性(EMC)设计、静电放电(ESD)、地面测试人员安全6个方面的影响,并提出应对措施。通过总结不同方案特点,提出了一种既能降低一次母线短路风险,又能减小对现有航天器设计方案影响的高阻接地改进方案,并对电气隔离关键特性的影响进行了仿真验证。结果表明:文章提出的高阻接地方案对现有遥测遥控电路、热控电路等的电性能影响较小,能使现有航天器设计改动最小,便于高阻接地的实施。In order to reduce risks from short-circuit between positive primary bus and structure or chassis on power safety of satellites,the primary bus high-impedance grounding and chassis high-impedance grounding schemes are compared,the influences of the different grounding schemes are analyzed at 6 aspects including short-circuit current,safety distance,electrical isolation,EMC(electro magnetic compatibility)design,ESD(electrostatic discharge),and the safety of ground testers with corresponding solutions.Through summarizing the advantages of the different schemes,an improvement grounding scheme is proposed,which can decrease the risk of primary bus short-circuit and reduce the effect on current design of spacecraft.The electrical isolation key features are verified by simulation.The results show that the proposed scheme has light effects on the current schemes of TM/TC circuit,heater controller circuit,and etc.It minimizes the changes of current spacecraft schemes,making it easy to be implemented.

关 键 词：航天器一次母线 高阻接地 电性能 短路电流 电气隔离 

分 类 号：V442[航空宇航科学与技术—飞行器设计]