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Project: T173700 #3418B
 

Increasing global energy requirements, combined with the growing integration of renewable energy power sources (both marine and terrestrial), have led to a significant rise in the installation of submarine transmission cables to distribute power within and between countries, spanning seas, estuaries, rivers and lakes. To the asset owner and network operator, reliability and availability of the cable to provide power transmission capacity to the network is paramount. A structured approach to cable operation & maintenance provides assurance that reliability and availability remain at predictable levels throughout the service life of the asset.

Operation & Maintenance (O&M) forms an integral part of asset management. The goal of maintenance is to prevent or mitigate any deterioration in performance of operational assets, as well as manage the risk of failures. Ideally, an O&M strategy should be considered during the initial design phase, appropriate for the physical and operational environment; however, the general principles of good submarine cable O&M are beneficial even if adopted in the later stages of an asset’s service life.

This guide introduces the principles, concepts, definitions and issues associated with the ongoing O&M of submarine transmission cables. The structure of the document allows for utilities to design an O&M strategy specific to the environment in which the asset is installed, understand the application and principles of survey equipment, evaluate the potential impact for marine activity to interact with submarine transmission cables, identify the types and severities of “Areas of Interest”, and identify when to instigate remedial works.

Keywords:

Transmission, Submarine Cable, Operations and Maintenance, Protection and Remediation, Marine Survey, Navigational Risk Assessment