IN Brief:
- Onshore consents have advanced for the Caledonia and Buchan offshore wind projects in Aberdeenshire.
- The works cover cable and substation infrastructure needed to connect offshore generation to the transmission system.
- The decisions move key ScotWind electrical infrastructure further into delivery planning as grid connection remains central to offshore wind build-out.
Ocean Winds has secured onshore planning consent for cable infrastructure linked to the Caledonia Offshore Wind Farm, while Buchan Offshore Wind has also advanced onshore consent for electrical infrastructure connecting its floating wind project to the transmission network.
The approvals move two major ScotWind projects further through the planning process at the point where offshore generation must be connected into the onshore electricity system. Landfall works, underground cable routes, substations, and grid-interface infrastructure are all required before offshore capacity can be exported into the wider network.
Caledonia is being developed by Ocean Winds and is expected to comprise a large offshore wind project in Scottish waters. Its onshore infrastructure is intended to connect the offshore wind farm to the transmission network, supporting the export of power from the project into the wider system.
Buchan Offshore Wind, a joint venture involving BayWa r.e., Elicio, and BW Ideol, is developing a floating offshore wind farm around 75km northeast of Fraserburgh. Its onshore application, submitted to Aberdeenshire Council in October 2025, included a cable landfall at Rattray Head, an underground cable route extending around 20km south, and a project substation close to the existing Peterhead substation.
Although turbine size, floating foundations, offshore substations, and marine installation methods often dominate discussion around offshore wind, the onshore connection package is becoming one of the defining delivery constraints. The grid connection determines whether exported power can move from the wind farm into the national system, and for large projects the cable route and substation design can be as schedule-critical as offshore construction.
Scotland’s offshore wind pipeline places particular pressure on transmission planning because strong wind resources are concentrated around coastal and offshore zones, while large demand centres are further south. That geography requires higher-capacity transmission routes, new substations, reinforcement of existing circuits, and closer alignment between offshore project timelines and network delivery programmes.
Several developments across the UK grid are moving in the same direction. Early construction funding for Scottish transmission projects is helping developers secure long-lead equipment and progress enabling works, while modular substation approaches are being used to accelerate grid connections by shifting more assembly, wiring, and testing away from constrained construction sites.
Grid connection is now a front-end development issue rather than a downstream technical package. Offshore wind developers have to align seabed rights, consent, route engineering, land agreements, grid offers, procurement, environmental mitigation, and construction sequencing before final investment decisions can be taken with confidence. Any gap between offshore readiness and onshore grid availability can create constraint risk, delayed energisation, or weaker project economics.
Floating wind adds further complexity to that delivery chain. Projects such as Buchan are expected to support a new generation of offshore technology, but they still rely on conventional and highly complex electrical infrastructure once power reaches shore. Export cables, onshore substations, reactive power management, protection systems, communications, and grid compliance all have to be delivered to transmission standards, regardless of whether turbines are fixed-bottom or floating.
Aberdeenshire’s role as a landing and connection zone is therefore growing alongside the ScotWind pipeline. Local planning decisions now shape national energy infrastructure because landfall routes and substation sites determine how offshore capacity enters the network. The consent milestones for Caledonia and Buchan do not complete the delivery chain, but they move critical electrical works into a more defined planning position.
More information on Buchan Offshore Wind’s onshore electrical infrastructure is available through the project planning and consent page.