Power and protection considerations for TeDP microgrid systems

Abstract

Purpose

The purpose of this paper is to highlight and discuss the unique safety and protection requirements for the electrical microgrid system in a turboelectric distributed propulsion aircraft.

Design/methodology/approach

The NASA N3-X concept aircraft requirements were considered. The TeDP system was decomposed into three subsystems: turbogenerator, distribution system and propulsors. Unique considerations for each of these subsystems were identified.

Findings

The fail-safe requirements for a TeDP system require a divergence from the standard safety case used for conventional propulsion systems. Advantages in flight control and single-engine-out scenarios can be realized using TeDP. Additionally, a targeted use of energy storage and reconfigurability may enable seamless response to propulsion systems failures.

Practical implications

The concepts discussed in this paper will assist to guide the early conceptual and preliminary design and evaluation of TeDP architectures.

Originality/value

The safety case for TeDP architectures is currently immature. The work presented here acts to frame some of the major issues when designing, evaluating and verifying TeDP conceptual architectures.

Citation

J. Armstrong, M. and A.H. Ross, C. (2014), "Power and protection considerations for TeDP microgrid systems", Aircraft Engineering and Aerospace Technology, Vol. 86 No. 6, pp. 509-514. https://doi.org/10.1108/AEAT-04-2014-0049