A DC distribution demonstrator incorporating Active Impedance Estimation for marine applications

Abstract

A small scale laboratory demonstrator has been constructed to represent a zonal DC distribution system as proposed for future naval vessels. This paper describes how the demonstrator has been used to validate a proposed fault location strategy -Active Impedance Estimation (AIE) -under experimental conditions. The practical processing algorithms required to reduce the effect of noise and the background supply harmonics are presented. The experimental results validate the AIE approach and confirm its robustness and accuracy.

Smart grids instrumentation-obtaining subgrid impedance information

“…In spite of different countries, locations, and physical background of impedance determination the Warsaw and Kiel Universities supplying grids impedance data from Figures 4 and 5 have much in common. The impulse excitation for grid impedance determination is successfully used by Blaabjerg [12,13], Sumner [14][15][16][17][18], Xu [3,[19][20][21], and Italian [22] research teams. From smart grids point of view, the most interesting is the Sumner research, currently with the focus on diagnosis and protection of isolated aircraft and marine grids with the use of Active Impedance Estimation.…”

“…The impulse excitation for grid impedance determination is successfully used by Blaabjerg , Sumner , Xu , and Italian research teams. From smart grids point of view, the most interesting is the Sumner research, currently with the focus on diagnosis and protection of isolated aircraft and marine grids with the use of Active Impedance Estimation.…”

Construction of a current injection unit for marine applications

“…In both DC and AC architectures faults are possible and need to be located and cleared. The concept of locating the fault by calculating the power system impedance has been investigated in different papers [7][8][9][10]. There is also the need to isolate the fault.…”