Challenges and opportunities with interfaces and materials for HVDC cable systems

Abstract

HVDC cable technologies will play a critical part in integrating renewable generation sources into the electrical power systems of the future. Here, we first consider how HVDC cables have evolved to the present time, with reference to the adoption of extruded insulation systems. In particular, we discuss the advances by which recently reported dramatic increases in rated voltage (up to 640 kV) have come about. We then describe a simulation approach for assessing the feasibility of developing cable systems for use at even higher voltages; this suggests that existing insulation materials may be approaching their performance limit, when both the internal electric field and thermal factors associated with heat dissipation in the conductor are jointly considered. Finally, some potential next-generation cable insulation systems are described, which address the performance gaps identified in the simulation.

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ORCID for Alun Vaughan: orcid.org/0000-0002-0535-513X

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