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Mathematical analysis of the equivalent impedance at the harmonic frequency for the proposed aircraft power system

Zhou, Qian; Sumner, Mark; Thomas, Dave

Authors

Qian Zhou

MARK SUMNER mark.sumner@nottingham.ac.uk
Professor of Electrical Energy Systems

Dave Thomas



Abstract

The proposals for the `More Electric Aircraft' place a significant, increased demand on the electrical power distribution system. To increase safety and reduce aircraft maintenance times on the ground, there is a greater need to quickly identify and locate electrical faults within the electrical distribution system. The work presented in this study provides the mathematical basis for the use of power system harmonic impedance measurement for identifying and locating faults within power cables. The method is passive - that is, it does not require the injection of any test signals - and can potentially be embedded into a centralised equipment controller to provide intelligent, real time diagnostics. The method monitors the harmonic line-line self-impedance at strategic points in the distribution system; this is obtained by measuring load voltage and current. Faults can be identified and located within a few fundamental cycles, and therefore provides a `backup protection' system which does not require measurement of the line current. It also can provide details of the fault location and could therefore be a significant aid to aircraft maintenance. This study derives the theoretical basis of the scheme and provides simulation results for a proposed aircraft power system to demonstrate the validity of this approach to detect and locate faults within the system.

Citation

Zhou, Q., Sumner, M., & Thomas, D. (2013). Mathematical analysis of the equivalent impedance at the harmonic frequency for the proposed aircraft power system. IET Electrical Systems in Transportation, 3(4), doi:10.1049/iet-est.2011.0056

Journal Article Type Article
Publication Date Dec 1, 2013
Deposit Date Apr 25, 2014
Publicly Available Date Apr 25, 2014
Journal IET Electrical Systems in Transportation
Print ISSN 2042-9738
Electronic ISSN 2042-9738
Publisher Institution of Engineering and Technology (IET)
Peer Reviewed Peer Reviewed
Volume 3
Issue 4
DOI https://doi.org/10.1049/iet-est.2011.0056
Public URL http://eprints.nottingham.ac.uk/id/eprint/2469
Publisher URL http://ieeexplore.ieee.org/xpl/articleDetails.jsp?arnumber=6670963
Copyright Statement Copyright information regarding this work can be found at the following address: http://creativecommons.org/licenses/by/4.0

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Copyright Statement
Copyright information regarding this work can be found at the following address: http://creativecommons.org/licenses/by/4.0





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