Modeling and Simulation of Variable Speed Variable Frequency Electrical Power System in More Electric Aircraft

Kelu Xu1, *, Ning Xie1, Chengmin Wang1, Xudong Shi2
1 School of Electronic Information and Electrical Engineering, Shanghai Jiao Tong University, Shanghai 200240, China
2 Aeronautical Automation School, Civil Aviation University of China, Tianjin 300300, China

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© 2017 Xu et al.

open-access license: This is an open access article distributed under the terms of the Creative Commons Attribution 4.0 International Public License (CC-BY 4.0), a copy of which is available at: This license permits unrestricted use, distribution, and reproduction in any medium, provided the original author and source are credited.

* Address correspondence to this author at the School of Electronic Information and Electrical Engineering, Shanghai Jiao Tong University, Shanghai 200240, China; Tel: +86-13818836927; E-mails:;


The More Electric Aircraft (MEA), Variable Speed Variable Frequency (VSVF) and Electrical Power System (EPS) has lager generating capacity and higher energy efficiency than the conventional Constant Speed Constant Frequency EPS, but the generators of MEA have to working as redundant power supplies to improve the power supply reliability, instead of parallel power supply. To study the steady state operation and power source change strategies under different fault conditions of VSVF EPS, the integrated structure of VSVF EPS is firstly illustrated and operating principles of components are theorized. The key components including variable frequency generators, Bus Power Control Unit, rectifiers and other supplementary elements are then simulated to build a comprehensive VSVF EPS model on the platform of Simulink and the power source change strategies are realized by logic units. Finally, the stability analysis in terms of normal operation is carried out in case studies and power source exchange strategies in different situations are summarized. The results show that the model proposed by the paper can be used to simulate MEA VSVF EPS and analyze its whole operational process effectively and efficiently.

Keywords: More Electric Aircraft (MEA), Power system, Variable Speed Variable Frequency (VSVF), Modeling and simulation, Steady-state analysis, Power Source Exchange.