飞机高压直流电气系统的建模和仿真

飞机高压直流电气系统是一种新型的电气系统,建立了包括发电机、直流斩波器、三相逆变器等高压直流电气系统典型组成部件的时域数学模型,利用基于微分方程的仿真方法,设计了以matlab作为计算平台的仿真程序,进行了系统加载实验,实验结果和实际较好的吻合;首先利用微分方程稳定性理论分析了DC/DC模块和恒功率负载相互作用时的稳定性问题,得出一个稳定性的结论,然后用模型进行了仿真验证,理论分析与仿真结果吻合,证明建模方法和结果是正确有效的,对系统设计具有参考价值.

Stability Analysis of Aircraft High Voltage DC Power System

The aircraft high voltage DC electrical system is a new concept electrical system. In this paper, a mathematical model in time domain is constructed, including typical components in high voltage DC electrical system, such as generator, dc chopper, three phase inverter. An emulator is designed by using matlab's m language, and a test with adding disturbance into the system is progressed, and the result of experimentation is accord with the reality. On the other hand, an example of application of the model is presented: first the stability problem is discussed by using theory of differential equation, and a conclusion is educed. With model test, theoretic analysis and simulation result are tallied, which proves that the modeling method and result are correct and effectual. It also provides reference to design electrical system.