Red Eléctrica and Redes Energéticas Nacionais partner to develop 400 kV interconnection between Pontevedra and Viana do Castelo

Type: Partnership · Technology: Transmission · Country: Spain/Portugal · Announced: 2026-07-03

Red Eléctrica and Redes Energéticas Nacionais signed a partnership to develop a new 400 kV interconnection linking Pontevedra in Spain with Viana do Castelo in Portugal. The project adds roughly 1,000 MW of exchange capacity, raising total cross‑border capacity to 4,200 MW Spain‑Portugal and 3,500 MW opposite direction. It includes new 400 kV substations at Bearíz and Fontefría in Spain and a 68 km line to the Ponte de Lima substation in Portugal. The interconnection supports greater integration of renewable generation, avoiding curtailment of wind and solar output in the Iberian market. The project is classified as a European Common Interest Project, reinforcing grid stability and cross‑border trade. No advisors or financing details are disclosed beyond the joint ownership.

Counterparties

Source article