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Marine power distribution system fault location using a portable injection unit

Jia, Ke; Bi, Tianshu; Liu, Bohan; Christopher, Edward; Thomas, David W.P.; Sumner, M.


Research Fellow

Tianshu Bi

Bohan Liu

Edward Christopher

Professor of Electromagnetics Applications

Professor of Electrical Energy Systems


A portable injection unit for Active Impedance Estimation (AIE) is built and tested in a DC zonal marine power distribution system to provide useful information for system protection and restoration. The portable unit generates current “spikes” and injects them into the system once short circuit faults are detected (by measuring the system voltage drop). The faulted system impedance can be estimated by AIE and comparing the estimated impedance with the pre-calibrated value, the fault location can be determined. The proposed method does not rely on system fault transient information or communication from the remote-end measurement and offers fast and accurate fault location in DC marine distribution systems. The proposed method has been tested and validated on a 750V, 2 MW twin bus DC Commercial Test Facility with the system both de-energised and energised.


Jia, K., Bi, T., Liu, B., Christopher, E., Thomas, D. W., & Sumner, M. (2015). Marine power distribution system fault location using a portable injection unit. IEEE Transactions on Power Delivery, 30(2),

Journal Article Type Article
Acceptance Date Oct 16, 2014
Online Publication Date Oct 31, 2014
Publication Date Apr 1, 2015
Deposit Date May 17, 2016
Publicly Available Date May 17, 2016
Journal IEEE Transactions on Power Delivery
Print ISSN 0885-8977
Electronic ISSN 0885-8977
Publisher Institute of Electrical and Electronics Engineers
Peer Reviewed Peer Reviewed
Volume 30
Issue 2
Keywords fault location, marine distribution system, injections, active impedance estimation
Public URL
Publisher URL
Additional Information c2015 IEEE. Personal use of this material is permitted. Permission from IEEE must be obtained for all other users, including reprinting/ republishing this material for advertising or promotional purposes, creating new collective works for resale or redistribution to servers or lists, or reuse of any copyrighted components of this work in other works.


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