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Grid infrastructure β€Ί Connection queue β€Ί Hydro and pumped storage

HYDRO AND PUMPED STORAGE Β· NGET

Cwm Dyli

Cwm Dyli is a 10 MW hydro and pumped storage project built and connected, connecting to the National Grid (England & Wales) network at Trawsfynydd 275kV Substation. The connection agreement is held by RWE Generation UK Plc.

Project stageOperating
  1. Planning (completed)
  2. Consented (completed)
  3. Construction (completed)
  4. Operating (current stage)
  5. Closed (not yet reached)

Connection details

NESO project number
PRO-000115
Customer
RWE Generation UK Plc
Technology
Hydro
Total capacity
10 MW
Already connected
10 MW
Connection site
Trawsfynydd 275kV Substation
Transmission owner
National Grid (England & Wales)
Connection type
Embedded (connects through the local distribution network)
NESO project status
Built

Connection site

The marker shows the connection substation, not the project itself, with the transmission network around it.

Projects connecting near Trawsfynydd Β· Grid map

Other projects at Trawsfynydd 275kV Substation

Source: NESO Transmission Entry Capacity (TEC) register, downloaded 8 November 2026. Contains data from NESO, licensed under the NESO Open Data Licence. Report a problem