Carbon Trust Dynamic Cable (2)

Cables Subgroup

Specialist subgroup dedicated to all aspects of cables for the offshore wind sector including both onshore and offshore export cables, array and dynamic cables as well as their manufacture, supply and installation.

Our new Subgroup

Cables are one of the critical components for any offshore wind farm. Our new specialist Cables Subgroup launched this month (Jan 2023) aims to showcase our members capabilities, products and services covering the manufacture, supply, installation and repair of both subsea and onshore cables.
Scotland is also one of the leading markets for floating offshore wind, which will require flexible, or what is known as dynamic cables, to connect floating turbine and substation platforms to each other and to the shore.

Oil and Gas Sector Experience
Many of our members have transitioned or diversified from Scotland's oil and gas sector where the knowledge of riser and umbilical technologies for floating oil and gas platforms, or FPSO* vessels, is directly applicable to floating wind.
This includes companies who manufacture dynamic cables for the oil an gas industry as well as members with expertise in cables installation, buoyancy and floatation systems.

Our members are developing new technologies for the floating wind market as Scotland will see up to 17GW of floating wind delivered in the next decade. Many cable related challenges still need to be overcome to ensure that floating wind's cost reduction pathway stays on track to deliver parity with fixed wind by 2030. These include new methods of connecting and disconnecting dynamic cables, cable protection systems, carousel designs, monitoring systems, higher voltage array cables, dynamic export cables and new splicing and repair systems. 

One of our members, the ORE Catapult, has produced a useful graphic on the taxonomy of dynamic cables which shows all of the elements involved in dynamic cables. Our Cable Subgroup contains members who cover almost every element shown in the diagram. The graphic is from their report 'Dynamic Cables and Ancillary Systems - Market Projections' and can be downloaded using he button below.


ORE Catapult report on 'Dynamic Cables and Ancillary Systems - Market Projections (PDF format)

Connecting 50GW by 203

The UK increased its offshore wind target from 40GW to 50GW in April 2022 with the advent of the British Energy Security Strategy. In order to ensure that this target was met, it was necessary to develop a plan to connect all of this wind power to the UK grid. Besides looking at the usual type of radial, wind farm to mainland grid connections this new plan explored options to interconnect offshore wind farms by subsea cables and to increase the connectivity between Scotland and England with a number of new HVDC subsea connections.  

Holistic Network Design (HND)
This plan sets out the scale of the infrastructure and expenditure needed to connect up to 23GW of offshore wind in the UK by 2030. In Scotland this will see 12.5GW of offshore wind, including up to 11GW of ScotWind projects, connected to the grid by 2030 creating a significant market for subsea cables for not only connecting up to eight wind farms but also by delivering the four new East Coast Scotland-England HVDC subsea interconnectors, or Eastern Green Links. It also includes a number of new multi-terminal HVDC connections:

  1. Connect the 2GW MachairWind project on the West Coast to both the Hunterston substation and to North Wales though the substation at Auchenrosh in South Ayrshire.
  2. Connect Phase 1 of Morven (1.5GW) to Dogger Bank Wind Farm
  3. Connect Morven to substation in Aberdeenshire with HVAC connection
  4. Connect Bellrock to Morven with a HVAC connection

This represents an excellent series of supply chain opportunities for our Cables Subgroup. Phase 2 of the HND is expected at the end of March 2023 which will aim to show how more of the ScotWind projects will be connected to the grid.

A presentation on the impact of the Holistic Network Design (Phase 1) in Scotland can be downloaded using the button below. This and the above information will be updated once the HND Phase 2 plan is released.

Nationalgrid ESO have also produced a useful interactive map showing each of the news connections proposed under the HND covering all the offshore projects as well as all of the onshore reinforcements required. It can be view using this link. Interactive Map on Nationalgrid ESO web site    

Holistic Network Design For 2030 In Scotland (DeepWind PDF presentation)

RUK Array Cable Graph

Global Array Cable Market

As the global offshore wind market gains momentum the need for export and array cables is growing exponentially. A recent Renewables UK (RUK) report from November last year, their 'Offshore Wind Project Intelligence Report – Cables Edition', shows a prediction for a six fold increase in demand by 2030.

The graphs on the left, taken from this RUK report, shows the figures in kilometres for array cables across the different regions. It can be seen that while East Asia currently has the largest market share per annum this changes towards the latter part of the decade with Northern Europe dominating the annual kilometres installed figures. 

The graph does not differentiate between static and dynamic cables but the vast majority will be static cables due to the low installed capacity world wide for floating wind. With two floating wind projects already operational, Scotland is responsible for a large percentage of the currently deployed dynamic array cables.      

RUK Export Cables Graph

Global Export Cable Market

The same pattern is repeated when looking at the export cable market as shown on the next graph on the right. One reason for the sharp increase in demand for both types of cable is the number of projects being delivered. Across North Europe another factor is also contributing to the increase in demand i.e. the length of the export cables. As countries in Northern Europe use up their near to shore sites the projects are moving further offshore. Scale is another factor, single projects are getting larger and now need multiple connections to shore to deliver the increased power and for security of supply i.e. redundancy.
Scotland is a good example of this process with ScotWind leasing round projects on the East Coast now with an average distance offshore of 65km. Although for ScotWind this has an additional challenge as 75% of these East Coast projects are for floating wind with a requirement for longer length dynamic array cables (due to the water depth) as well as dynamic export cable sections.
Scotland also has one of the best examples of what is happening with project scale. SSE Renewables planned Berwick Bank project which, at 4.1GW, will be the largest offshore wind farm in the UK, will have up to 10 Offshore Substation Platforms (OSP), 1,225km of array cables, 94km of interconnectors (connecting the OSPs) and 12 exports cables with a total length of 1,072km.
With the Moray West, Inch Cape, Seagreen 1a and 20 ScotWind projects still to come as well as the planned offshore grid and Scotland-England interconnectors in the Holistic Network Design Scotland is one of the main target markets for HVDC and HVAC cable companies worldwide. Our Cables Subgroup member have this market on their doorstep.      



The Carbon Trust and the Offshore Renewable Energy Catapult are both delivering innovation programmes which include cable technologies. Below are two reports looking at the subject of dynamic cables for floating offshore wind.

Download the OWA report 'Unlocking the next generation of offshore wind: step change to 132kV array systems'

Array Cables: From 66kv to 132kv

The Carbon Trust's Offshore Wind Accelerator (OWA) has published this report looking at the next development in voltage levels for array cables
'Unlocking the next generation of offshore wind: step change to 132kV array systems'
The OWA High Voltage Array Systems project has produced this study looking at the the optimal voltage level for next generation array cables and how the industry can transition most effectively to this new standard capacity.
Use the link button below to download the report.

Step change to 132kV array systems
Download the report Dynamic Cable Technology Qualification Framework and Case Studies

Technology Qualification Framework

The Offshore Renewable Energy Catapult and our very own Cables Subgroup Co-chair, 2H Offshore partnered to produce this document, 'Dynamic Cable Technology Qualification Framework and Case Studies'.
This is Phase 1 of the ORE Catapult's Floating Offshore Wind Dynamic Cabling Systems –Technology Development and Qualification Programme which seeks to help the development and validation of the cables technologies that will support the move towards large scale floating wind in a cost effective manner. Use the link button below to download the report.

Dynamic Cable Technology Qualification Framework

List of Cables Subgroup Members
One of two new Subgroups for DeepWind in 2023. The Cables Subgroup has grown to136 members and our Industry Co-chairs are Dr Qi Tang from NBO Orient Cables and Liam Moore of 2H Offshore Engineering. Companies wishing to join this newer one of our subgroups can submit a DeepWind membership application and select the Cables Subgroup in the subgroup section. Existing DeepWind members can just ask to be added to the subgroup. 

1 23 Degrees Renewables Ltd 69 JDR Cable Systems
2 2H Offshore Enngineering Ltd 70 Jee Limited
3 ABS Europe 71 Jifmar Scotland
4 Abtech Ltd 72 KLINGER Ltd
5 Amber Electrical Services 73 Kraken Robotics Services UK Limited
6 Approved Power Services 74 Legasea
7 Aquaterra Energy 75 Liftmax Europe Ltd
8 Aratellus Offshore 76 Lloyd's Register EMEA 
9 Archaeological Management Solutions  77 Lloyd's Register EMEA 
10 Ashtead Technology 78 LV Logistics
11 Aspect Land and Hydrographic Surveys 79 MacArtney UK
12 Atlas Professionals 80 MacLean International Group
13 ATPI Marine and Energy 81 Manor Renewable Energy
14 Aubin Limited 82 Maritime Developments Limited 
15 Aurora Energy Services  83 Maritime Developments Ltd
16 Aventus Energy 84 Marlinks
17 Baker Hughes 85 Marlow Ropes
18 Balmoral 86 MB Plant
19 Barassie Engineering Systems Ltd 87 More Wind Resources
20 Black & Veatch 88 NES Fircroft
21 Boskalis Subsea Limited 89 Nexans Norway AS
22 Bourbon Wind  90 NorrScott Productions
23 Bouygues Travaux Publics 91 N-Sea UK Limited
24 Briggs Marine 92 Ocean Information Services
25 Brimmond 93 Ocean Phoenix International Limited
26 BVG Associates 94 Offshore Renewable Energy Catapult
27 C&P Recruitment 95 Offshore Wind Consultants
28 Caley Ocean Systems 96 Orient Cable
29 Castletown Law 97 Orion Research
30 Clarkson Platou Offshore & Renewables 98 Osbit Limited
31 Cortland Company 99 Paratus Commercial Services Limited 
32 DOF Subsea 100 PB Aerial Imaging Ltd
33 E-FWD 101 Pell Frischmann
34 Eletelle Subsea Ltd 102 Prior Power Solutions
35 Encomara Ltd 103 Proserv (Synaptec)
36 Enerfloat Ltd 104 Quartzelec
37 Energy Insider 105 Raeburn Drilling & Geotechnical Ltd 
38 Eodex 106 Reach Subsea
39 ESS 107 RED Engineering 
40 European Marine Energy Centre 108 Reed & Mackay
41 Evami Consultancy Services  109 Reflex Marine
42 Ffolkes Offshore 110 Renantis
43 First Marine Solutions 111 Robertson Group
44 First People Solutions 112 Rovco
45 First Subsea 113 Roving Eye Enterprises Ltd
46 Flexlife Ltd 114 S3NVentus
47 Flotation Energy 115 Scottish Enterprise
48 Fulkrum Technical Resources Ltd 116 Scottish Renewables
49 GB Tarpaulins 117 Seagard Limited
50 GDDM 118 Semco Maritime
51 Geodis FF UK Ltd  119 Shimadzu Corporation
52 Global Quantum 120 Skyborn Renewables
53 Global Underwater Hub 121 Skyform (Scotland) Ltd 
54 Hagland Shipbrokers 122 Sonardyne International Limited
55 Hebridean Sea Tours Ltd  123 Sparrows Offshore Group Ltd
56 Helix Robotics Solutions Ltd 124 Stuart Brown Consulting
57 Hydro Group 125 Subsea Micropiles
58 I7V Renewables 126 Superior Recruitment Group
59 IKM Testing 127 TechnipFMC
60 Indeximate Ltd 128 The Environmental Recruitment Agency 
61 Industrias Ferri SA 129 Toda Corporation
62 Inspire Environmental 130 Unique Group Ltd 
63 Instow Line Marine Services 131 V-TES
64 Integrity Integrated Service Solutions  132 Wave Venture
65 Interocean Marine Services 133 WindGrid
66 IRIS NDT 134 Wood Thilsled 
67 Irvine Springs 135 X-Academy
68 J+S Subsea 136 XLCC

Other DeepWind Subgroups

Explore our other specialist subgroups using the links below

Operation & Maintenance Subgroup

Operation and maintenance is one of the long term opportunity areas attached to the development of offshore wind in Scotland.

Power2X Subgroup

Our Power2X Subgroup is involved in looking at alternate products from offshore wind besides the normal electricity to the grid business model.

Survey and Inspection Subgroup

From early stage development surveys to all aspects of aerial, surface and subsea inspections, this subgroup covers it all.