Residents of small Carmarthenshire village to have say on new substation plans
National Grid Electricity Transmission (NGET) say they want to hear what communities near Llandyfaelog in Carmarthenshire think about their initial proposals for a new 400kV substation.
NGET say the proposed substation is a vital step in strengthening the electricity network in South Wales. It is being proposed in response to connection requests from Green GEN Cymru and National Grid Electricity Distribution (NGED), reflecting the region’s increasing demand for clean, reliable power.
NGED is the distribution network operator (DNO) in the region, and is a separate company from NGET; Green GEN Cymru is the independent distribution network operator (IDNO) whose Towy Teifi project is proposed to connect at Llandyfaelog.
Green GEN Cymru and NGED are expected to submit separate planning applications for their own 132kV substations within the footprint of the proposed NGET site.
The new substation would be located around 6km south of Carmarthen, with site access to be from a new access road which will connect to the A484 between Llandyfaelog and Idole.
A plan of the proposed electricity substation site
Local communities will have the opportunity to get involved and provide feedback during a four week consultation period from Tuesday 17 June to Tuesday 15 July 2025. A series of in-person events and an online webinar will offer residents the chance to meet the project team, ask questions, and help shape the proposals.
A second phase of consultation will follow before NGET submits a planning application to Carmarthenshire County Council in 2026.
Matthew Cumming, NGET’s regional connections manager for South Wales, said:
Our proposals for Llandyfaelog are an essential part of our investment in Wales’ clean energy future. By developing this project, we’re helping to power homes and businesses across South Wales and support regional growth.
We understand the importance of working closely with local communities, and we’re committed to listening and responding to their views. These consultation events are a great opportunity for people to get involved and help shape our plans as we progress them.
Substations are critical parts of the transmission and distribution networks and enable electricity to be transmitted at different voltages, securely and reliably.
One of the main roles of substations is to convert electricity into different voltages. This is needed so the electricity can be transmitted throughout the country and then distributed throughout local neighbourhoods and into our homes, businesses and buildings.
NGET takes electricity generated from power sources and transports it through its network of overhead lines, cables, and substations. It is then transmitted at a lower voltage via the local distribution networks to homes and businesses.
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