From the editors' desk
The first article in this issue is “High stress wet aging of cable dielectrics— Meeting new challenges,” by Simon Sutton, Electronics and Electrical Engineering Group, University of Southampton, UK. This review article identifies a number of gaps and contradictions in the current understanding of water treeing and highlights the inability to predict accurately future performance based on even modest changes in cable design or materials. These gaps have been identified as a consequence of the offshore windfarm industry’s desire to adopt more cost effective higher voltage cables. The article indicates a need for more focused research on the specific issues which will be faced by higher electrical stress wet design cables in a subsea environment, particularly on full scale or model cables, where the interactions of the different material layers may be important, e.g., limiting the diffusion of water or salt ions into the core. In addition, water treeing behavior at lower temperatures, more representative of the minimum temperature likely to be experienced by subsea cables, needs further investigation.