I. Introduction
THE progressive demand for All Electric Aircraft (AEA), is to reduce the weight and volume of the aircraft by replacing more mechanic, hydraulic and pneumatic system to electrical driven technology. Electrical onboard system for MEE/ MEA is not only to reduce the weight and environmental impact but also to provide better controllability on the aircraft power component and electrical distribution system. Developing a stable power supply and quick response in an emergency, integrating energy management system consisting of power generation, network distribution and hybrid energy storage can optimize the extracting power of the generator and engine control. This system not only achieves at high efficiency and low emission, but also benefits to lowest fuel burn with the integrated power management system (PMS) by scheduling the generators power and assistive energy storage with the advanced optimal load management.