Onshore description

The wind farm’s two 85 kilometres export cables will reach the Firth of Forth coastline in East Lothian. They will join a short section of onshore export cable which will connect into the new 220/275kV onshore substation being constructed on the site of the former Cockenzie Power Station. The coal-fired power station was demolished in 2014 leaving a brownfield site ripe for redevelopment. Once built, the substation will comprise two large transformers, shunt reactors, harmonic filters, static var compensators and additional electrical equipment. 

From the substation, the power will be transported around 300 metres underground to the existing Scottish Power Energy Networks (SPEN) 275/400kV substation in Cockenzie. From here it will enter the national transmission system on its way to providing green electricity to UK homes, businesses and industry.

The substation is in an ideal location, right on the coast and adjacent to the existing grid connection and transmission infrastructure. Its location means that construction works will be noticed by few communities and there will be no impacts on the wider Scottish countryside. 

Computer-generated visualisation of Inch Cape's onshore substation

Construction progress

Inch Cape secured Planning Permission in Principle (PPP) for the proposed onshore transmission works in February 2019 and signed a land agreement with East Lothian Council.  

Work started on the 2.6 hectare site in 2023 with principal contractor Siemens Energy leading the activity.  RJ McLeod, a leading Scottish civil engineering company, completed the enabling works in October 2023 which included demolition and backfilling, minor drainage activity, plus the erection of site accommodation and a five-metre-high retaining wall. 

The main civil works at the site are now well in progress. They are being undertaken by civil engineering contractor Careys and to date have comprised: further drainage, internal roads, bunds and landscaping as well as the creation of concrete bases and cable troughs. The current key focus is on the erection and cladding of steel-framed buildings prior to the arrival of electrical equipment. The Inch Cape team will continue to liaise with the local community on the programme, particularly in relation to the arrival of any heavy loads.