As technology advances, new challenges arise for power systems engineers in terms of EMT modeling and simulation. A good example is the HVDC transmission system under construction between France and Ireland. The French and Irish transmission system operators (RTE and EirGrid) have been working together to build this 575km length, 700MW HVDC link to connect the two countries. The involved parties have been performing feasibility studies to evaluate the behavior of the HVDC system using EMTP®. Given the project's relevance, accurate and reliable simulation tools are required for modeling both underground and submarine cable sections, including an optical fiber cable. The cable impedance must be accurately modeled from DC up to switching frequencies, which is a very large band of frequencies. Cable models may display wrong behavior for DC phenomena and/or high frequencies without proper care. To fulfill the abovementioned requirements, EMTP® offers the Line/Cable Data calculation module, which is a state-of-the-art tool for transmission line and cable modeling. This module is suitable for modeling both overhead lines and underground/ submarine cables. | 
