A Module-Based Approach for Stability Analysis of Complex More-Electric Aircraft Power System

Moving toward more-electric aircraft (MEA) architecture, future aircraft power system will consist of a large number of power converters and motor drive loads which behave as constant power load and may cause stability issues. It is essential to ensure stable operation of the MEA power system, even though the complexity of the system hinders the comprehensive analysis of system stability. This paper presents a framework for stability analysis of a complex MEA power system. A module-based approach is proposed to provide a general and flexible solution for modeling and integrating complex systems, even under situations of system extension and reconfiguration. Using the proposed technique, a complex system model is conveniently formulated and overall system stability can be evaluated. Then, the critical stability points can be investigated. Impacts of parameters and their damping effects are identified by eigenvalue analysis and sensitivity analysis. The hybrid ac/dc MEA power system adopted by Boeing 787 is analyzed using the proposed technique. Simulations in MATLAB/Simulink are conducted to validate the effectiveness of the proposed modeling technique and the analytical results.