Pelagian’s consultants have worked in the offshore power cable sector for over 10 years.

Our consultants understand the complexities of building offshore power cable interconnectors and have successfully applied that specialist knowledge to the largest and most complex power cable projects.

Case Study: Italy to Tunisia Power Cable Permit Study

Pelagian were contracted by a major international engineering consultancy to provide expertise on permits for a proposed HVDC power cable between Italy and Tunisia in the Mediterranean Sea.
The study researched the maritime jurisdictions of each of the countries crossed by the proposed cable and the permitting and regulatory requirements for the survey and installation of a subsea power cable.
The work scope also researched the environmental requirements at the landing points and coastal shelf areas and also stakeholder requirements for the crossing of a significant number of active telecom cables and oil/gas lease blocks.

Case Study: Gwynt Y Mor Cable Engineering and Data Management Services

Pelagian were contracted to provide detailed route engineering and cable burial risk assessment advice for the Gwynt Y Mor offshore wind farm project. This involved working with both the developer and cable installation companies to provide expert analysis of the seabed hazards for cable routes and wind turbine generator (WTG) foundations.
Project work included the collation of 10 years of geophysical survey data into a unified geospatial dataset, which was used to inform the export and array cable route planning and also construction phase works.
Pelagian’s knowledge of the project and expertise in handling this geospatial data greatly assisted in the planning of WTG construction and cable lay operations, while forming the basis for the developer’s own geographical information database and marine management systems.

Case Study: Java Bali Power Cable Route Engineering

Pelagian was contracted to provide expert cable route engineering services for the planned installation of two 5km long power cables between the islands of Java and Bali in Indonesia.
Project work included the geospatial data management of detailed high resolution seabed bathymetry and associated seabed images to determine the location of the existing power cables and plan the routes of the new cables.
The routes proved to be very challenging, with steep rocky slopes reaching depths of 80 metres. The cables were planned to avoid suspensions and sharp rock outcrops so that they could be rock dumped after lay. Pelagian provided an expert analysis of potential cable spans to assist in the cable lay.

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