| Title |
A Study on the Electrical Property Changes of Submarine Cables for Offshore Wind Farms under Repeated Bending Stress |
| Authors |
최진욱(Jin-Wook Choe) ; 윤성호(Sung-Ho Yoon) ; 임진석(Jin-Seok Lim) |
| DOI |
https://doi.org/10.5370/KIEE.2025.74.12.2247 |
| Keywords |
Submarine power cable; Scour; Bending stress; Lead sheath; Metallic sheath resistance |
| Abstract |
As offshore wind deployment accelerates, the mechanical and electrical reliability of submarine power cables that interconnect turbines and transmit power to shore has become a central concern. In fixed-bottom wind farms, local seabed scour near foundations and uneven bathymetry can expose cables or create free-span sections, leading to repeated bending driven by waves and currents. Such repeated mechanical stress may affect the long-term performance of submarine cables. In particular, design choices such as dry versus wet concepts and sheath materials directly influence vulnerability patterns and the strategies for inspection and maintenance over a 20 to 25 year service life.
This study investigates how repeated bending, representative of scour-induced free spans, influences the electrical characteristics of dry and wet submarine cables. Under controlled laboratory conditions, bending loads were applied, followed by measurements, performed in accordance with IEC standards, of DC resistance for the conductor and metallic sheath and of the dielectric properties of cross-linked polyethylene insulation. |