System Impedance Measurements of Power Cable Umbilicals

This paper considers measurements of electrical
parameters for subsea power umbilicals. Electrical system
parameters given in the umbilical datasheets may be
inadequate for dimensioning the electrical system as they
often are IEC-specifications. The parameters may be
estimated by finite element analyses, but the models used
in these analyses must be calibrated for different umbilical
designs. A measurement method giving all relevant
electrical parameters for power system calculations and
model calibrations is therefore established. The method is
tested on several umbilical and power cable designs from
different manufacturers through ten years work.