State-of-the-art review of post-installation effects on subsea cable thermal properties for rating calculations

This paper presents a state-of-art review of post-installation effects (PIE) application for design of offshore subsea power cables. The thermal performance of subsea power cables is a key factor in the design of offshore wind farms, as cable ampacity determines how much power can be safely transmitted without exceeding temperature limits. Current industry practice typically evaluates cable ratings using standardised methods that assume uniform and undisturbed soil conditions. However, offshore environments often contain complex and heterogeneous soil layers, including organic-rich infills and high-resistivity sediments, which can constrain the thermal behaviour of buried cables. In addition, cable installation processes themselves can modify the surrounding soil.