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Advanced DC zonal marine power system protection

Jia, Ke; Christopher, Edward; Thomas, David W.P.; Sumner, M.


Research Fellow

Edward Christopher

David W.P. Thomas

Professor of Electrical Energy Systems


A new Active Impedance Estimation (AIE) based protection strategy which is suitable for utilization in a DC zonal marine power distribution system is presented. This method uses two triangular current "spikes" injections for system impedance estimation and protection when faults are detected. By comparing the estimated impedance with the pre-calibrated value, the fault location can be predicted and fault can be isolated without requiring communication between two injection units. Using co¬operated double injections and line current measurement (directional fault detection), faults in the system with same impedance and different fault positions can be distinguished, located and isolated. The proposed method is validated using experimental test results derived from a 30kW, 400V, twin bus DC marine power system demonstrator. The experimental tests were applied to both faults during normal operation and faults that occur during system restoration.


Jia, K., Christopher, E., Thomas, D. W., & Sumner, M. (2014). Advanced DC zonal marine power system protection. IET Generation, Transmission and Distribution, 8(2),

Journal Article Type Article
Acceptance Date Jul 8, 2013
Publication Date Jan 1, 2014
Deposit Date Jul 14, 2016
Publicly Available Date Jul 14, 2016
Journal IET Generation, Transmission and Distribution
Print ISSN 1751-8687
Electronic ISSN 1751-8695
Publisher Institution of Engineering and Technology (IET)
Peer Reviewed Peer Reviewed
Volume 8
Issue 2
Keywords DC zonal marine system, protection, injections, impedance estimation
Public URL
Publisher URL


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