Communities to have their say on National Grid proposals for new substation near Carmarthen

• Proposed substation at Llandyfaelog will help meet growing electricity demand in South Wales

• Facility is proposed in response to energy schemes requesting to connect to the grid in the region

• National Grid is consulting communities for four weeks, between Tuesday 17 June and Tuesday 15 July

National Grid Electricity Transmission (NGET) wants to hear what communities in Carmarthenshire think about their initial proposals for a new 400kV substation near Llandyfaelog. 

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.

NGET has a legal obligation to connect energy schemes to its network when a request is made, and with existing substations in the region already operating at full capacity, a new facility is needed to plug in new projects.

The proposals are part of NGET’s broader programme of upgrades across Wales, designed to support the country’s transition to a low carbon future and ensure homes and businesses have access to clean energy.

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.

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.

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.

Details for the community information events are as follows:
 

People can also find all the project information and how to give their feedback on the project website at nationalgrid.com/llandyfaelog.