电力电子化机载电力系统稳定性分析

多电飞机由于越来越多地采用电能作为能源供给形式,其电力系统的稳定性愈加重要。电力电子技术的发展是推动多电飞机及飞机电力系统技术进步的重要力量之一。同时考虑交直流系统及其相互作用,建立包含发电机、自耦变压整流器、机电作动器在内的多电飞机电力系统平均值模型,力求简单准确且适合系统大扰动稳定性分析的需求;在此基础上,结合混合势函数理论和李雅普诺夫稳定性定理对系统的稳定域进行求解。仿真结果表明,所提出的大扰动稳定性分析方法准确、快速,能灵活分析各类参数对系统稳定性的影响。

Stability analysis of power electronic aircraft electric power system

As more and more devices on board are supplied with electrical power energy, the stability of AEPS(Aircraft Electric Power System) in MEA(More Electric Aircraft) is getting more and more concerned. The progress of power electronics is one of the vital forces promoting the development of MEA and its electrical power system technology. Simultaneously considering AC and DC systems and their interaction, an averaging valued model of the AEPS in MEA is built, including generators, autotransformer rectifiers and electromechanical actuators, to serve as a simple, accurate and proper prototype for stability analysis under large disturbances. The mixed potential theory and Lyapunov stability theory are used to estimate the stability region of the system. Simulative results show that the proposed method for stability analysis under large disturbances is accurate and fast, and can flexibly analyze the in fluence of various parameters on system stability.