航天器供配电系统建模与仿真研究

Research on modeling and simulation of power supply and distribution system for spacecraft

传统的能量平衡分析软件只能分析航天器供配电系统的研制特点和验证需求。针对此缺点,文中采用多领域统一建模语言Modelica建立一套可重用、可扩展的供配电系统仿真验证模型库。该供配电系统模型由运行环境、太阳能电池、蓄电池组、电源控制器、配电器和负载等组件模型搭建而成,其中,电源控制器还包含主误差放大器、分流调节器、放电调节器、母线滤波器等子组件模型。在设计早期的闭环验证中,将组件设计参数注入系统模型,对能量平衡、电源输出特性及母线特性等关键性能开展仿真分析。仿真结果表明,基于Modelica的航天器供配电系统模型能支撑供配电系统快速仿真验证,确保更全面的方案优选,可提高工作效率。

As the traditional energy balance analysis software can only analyze the development characteristics and verification requirements of the power supply and distribution system for spacecraft,a set of reusable and extensible simulation verification model library for the power supply and distribution system is established by means of the multi-domain unified modeling language Modelica. The power supply and distribution system model is constructed with the component models of operating environment,solar cell,battery bank,power controller,distributor and load. The power controller also contains main error amplifier,shunt regulator,discharging regulator,bus filter and other sub-component models. In the closed-loop verification at the early stage of design,the component design parameters were injected into the system model,and the simulation analysis on key performances such as energy balance, power output characteristics and bus characteristics were conducted. The simulation results show that the model of the spacecraft power supply and distribution system based on Modelica can support the rapid simulation and verification of the power supply and distribution system,ensure a more comprehensive scheme selection,and improve work efficiency.