Onshore AND offshore multiterminal HVDC converter stations 320kv

1 (one) multi-terminal HVDC Voltage Sourced Converter (VSC) converter system in symmetrical monopole configuration operating at DC voltage of 320 kV composed of: - 2 (two) onshore converter stations (one in Gironde and one in Loire-Atlantique) with capacity of 1.2 GW connected by RTE to the nearest 400kV AC existing substation located respectively in Gironde and Loire-Atlantique; and - 1 (one) offshore substation composed of 1 (one) offshore converter platform and 1 (one) offshore converter station with capacity of 1.2 GW including the AC switchgear to connect to the grid an Offshore Wind Farm (OWF); and - 1 (one) potential offshore substation composed of 1 (one) offshore converter platform and 1 (one) offshore converter station with capacity of 1.2 GW including the AC switchgear to connect to the grid another Offshore Wind Farm (OWF). The scope includes especially the design (including detailed design), engineering, procurement, manufacturing, supply, transportation, installation, construction (including onshore civil works and all offshore supporting structure), testing, onshore and offshore commissioning, spares provision, operational handover, warranty and maintenance.