Terna S.p.A.

Terna S.p.A., the Italian transmission system operator, is the counterparty for grid connection on the TuNur Italy HVDC interconnector. Terna selected and approved the interconnection point on the Tyrrhenian coast in Italy (Montalto di Castro, Lazio) and provided a 2,000 MW grid connection solution that can accept the full output of the planned Tunisia–Italy +/-525 kV VSC HVDC link onto the Italian transmission network without the need for lengthy grid reinforcements or upgrades. The grid connection arrangement underpins the project's 2 GW capacity target and enables the dual-bipole HVDC system to land directly into Terna's 400 kV network at Montalto di Castro. Terna's interconnection-point selection was based on prior engineering work by CESI, and was formally announced alongside the TuNur Ltd joint venture in January 2012. The relationship places Terna as the host TSO at the European end of the cable, responsible for ENTSO-E network coordination and for project assessment through successive TYNDP cycles (Project 283 in TYNDP 2016, 2020, 2022 and 2024). This is a grid_connection role rather than a contracted supply relationship — Terna is providing access to the European transmission network, not building part of the project for TuNur. Contract value and tariff terms are not stated in the cited source.