Electromagnetic Analysis of Submarine Umbilical Cables With Complex Configurations

These studies present the electromagnetic analyses of different configurations of the so called "Integrated Production Umbilical," or simply Umbilical Cables. Modern Umbilical Cables can have more than 4 independent 3-phase power circuits as well as steel tubes. There is no 2-D symmetry for these cable configurations and the 3-D simulations are very undesirable due to cable length. The adopted methodology to evaluate cable performance is a combination of 2-D-finite element analyses (coupled with electric circuit) and the transposition technique. The results have shown that the configuration B in which all power circuits rotates along its own center has better performance considering the load terminal voltages due to the compensation of the induction effect along the cable.