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Submarine Power Cables Engineering Design

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Service Introduction

Longitude provides design and engineering services for subsea cables, with experience in various advanced analyses and simulations for risk mitigation in cable lay operations.

We offer services needed by customers to design cable routes, identify risks and opportunities in cable lay operations, vessel mobilisation, cable protection, and maintain and repair cables for offshore wind projects.

Our offering is supported by the practical and operational experience in subsea cable lay operations of our sister company, the marine surveying branch of ABL Group, ABL.

Offshore Substations  Market Challenges

  • Cable lay installation techniques and new techniques to content contend with emerging risks
  • Hostile environments, deeper waters and new geographies
  • Costs in potential operations and maintenance
  • Supply chain constraints
  • Technological integration and grid connection

Our Subsea Cable Engineering Services 

Longitude’s operational-focused submarine cable installation services include skidding moorings, cable lay and pull, analysed in simulations using Orcaflex – the industry-standard software applied to these operations. Longitude has also developed its own tool for automating the pre- and post-processing of cable installation analyses, allowing us to handle an increasing number of environmental cases.

Typical services include: 

  • Site Characterisation and ground modelling
  • Survey Specification and Management
  • Geospatial data management and analysis
  • Cable Routing Assessment and production of route positioning lists
  • Cable Burial Risk Assessment (CBRA)
  • Cable Burial Assessment Study (BAS)
  • Infrastructure crossing design (concept and detail design)
  • Cable lay, shore pull-in, and seabed stability Orcaflex analyses
  • Cable protection design (concept and detail design)
  • Freespan Analysis
  • Nozzle Configuration
  • Pump Analysis
  • Burial Tool Development support
  • Scour assessment
  • Seismic engineering and liquefaction analysis
  • On bottom Stability Analyses
  • Ongoing support for continued cable protection post lay analysis and review of protection measure and cable-soil studies

 

Our Value

In-depth expertise in electrical and subsea cable engineering, including grid consultancy

Recognised as market-leading in marine warranty survey (MWS) for submarine cable transportation and installation (T&I), giving us a unique understanding of the risk portfolio attached

Multi-disciplined design and engineering expertise in-house

Technical centre of excellence in geoscience disciplines, with expertise in cable burial risk analysis (CBRA), cable route analysis and design

Our geographical reach and experience positions us to understand the unique environmental conditions of different geographies

Technical advisory expertise in OEMs and subsea cable manufacturers, via sister company OWC

Your Projects

View All Case Studies

Explore examples of how Longitude’s subsea cable engineering have contributed to the successful delivery of your projects.

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