Comparative Study of Power Sharing Strategies for the DC Electrical Power System in the MEA

Paper #:
  • 2015-01-2410

Published:
  • 2015-09-15
DOI:
  • 10.4271/2015-01-2410
Citation:
Gao, F., Bozhko, S., Asher, G., and Wheeler, P., "Comparative Study of Power Sharing Strategies for the DC Electrical Power System in the MEA," SAE Technical Paper 2015-01-2410, 2015, doi:10.4271/2015-01-2410.
Pages:
13
Abstract:
In this paper, the load sharing principles in dc-distribution electric power systems (EPS) for future more-electric aircraft (MEA) are investigated. The study is conducted using a potential MEA EPS architecture with multiple sources feeding into the main dc bus. Corresponding reduced-order EPS models are established. The influence of the cable impedance on the load sharing accuracy is analyzed and sharing error is quantized in mathematical equations. In addition, source/load impedance of the droop-controlled system has been derived leading to the discussion of the stability issues in multi-feed dc EPS under different droop control strategies. The influence of load sharing ratio on the EPS stability margins has been investigated. The theoretical findings were supported by time-domain simulations in Matlab/SimPower.
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