Advanced DC zonal marine power system protection. Issue 2 (1st February 2014)

• Record Type: Journal Article
• Authors: Jia, Ke; Christopher, Edward; Thomas, David; Sumner, Mark; Bi, Tianshu
• Is Part Of: IET generation, transmission & distribution. Volume 8:Issue 2(2014)
• Page Start: 301
• Page End: 309
• Publication Date: 2014-02-01
• Subjects: fault diagnosis -- fault location -- power distribution protection -- power system restoration -- marine power systems; advanced DC zonal marine power system protection -- active impedance estimation based protection strategy -- DC zonal marine power distribution system -- triangular current spike injections -- system impedance estimation -- fault location -- coordinated double injections -- line current measurement -- directional fault detection -- fault positions -- twin bus DC marine power system demonstrator -- power system restoration -- power 30 kW -- voltage 400 V; Electric power production -- Periodicals; Electric power transmission -- Periodicals; Electric power distribution -- Periodicals; 621.3105
• DOI: 10.1049/iet-gtd.2013.0139
• Languages: English
• ISSNs: 1751-8687

Abstract

Abstract : A new active impedance estimation based protection strategy which is suitable for utilisation 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‐ordinated 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 30 kW, 400 V, 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.