Cometa (HVDC)

Cometa (HVDC)
Country Spain
From Morvedre 39°38′28″N 0°14′7″W / 39.64111°N 0.23528°W / 39.64111; -0.23528 (Cometa - Morvedre HVDC Static Inverter)
To Santa Ponsa 39°32′2″N 2°30′21″E / 39.53389°N 2.50583°E / 39.53389; 2.50583 (Cometa - Santa Ponsa HVDC Static Inverter)
Ownership information
Owner Red Eléctrica de España
Construction information
Manufacturer of conductor/cable Prysmian
Installer of conductor/cable Prysmian
Cable layer C/S Giulio Verne
C/S Nexans Skagerrak
Manufacturer of substations Siemens
Commissioned 2011 (expected)
Technical information
Type submarine cable
Type of current HVDC
Total length 247 km (153 mi)
Power rating 400 MW
AC Voltage 230 kV
DC Voltage 250 kV
Number of poles 2

COMETA (abbreviation for COnexión MEditerránea Transporte Alta tensión; also known as the Majorca–Valencia interconnector and the Romulus project) is an undersea electric power transmission system being constructed between mainland Spain and the island of Majorca. It will connect Morvedre near Valencia and Santa Ponsa near Palma de Mallorca. The project is developed by Red Electrica de España.



On 26 September 2007, contracts between Red Electrica de España and the cable manufacturers Nexans and Prysmian were signed.[1][2] On 9 October 2007, a contract with Siemens was signed for supplying two converter stations.[3]

The laying of the first cable started on 13 January 2011 and the laying of the second cable started on 27 January 2011. The first cable was laid by the cable ship Giulio Verne and the second cable was laid by the cable ship Nexans Skagerrak.[4] Trenching was done by waterjet from the MPSV "Edda Fjord",the worlds biggest MPSV when she was built in 2002 and "Argo 1".

Technical description

The cable is produced and laid by Prysmian and Nexans.[4] The system consists of two bipolar high-voltage direct current (HVDC) cables with a capacity of 200 MW and an operating voltage of 250 kV of each, and a metal return cable. It has a total transmission capacity of 400 MW. The maximum depth of the submarine cable will be 1,485 metres (4,872 ft). It is the second longest submarine power cable after NorNed and the second deepest after SAPEI.[4] The submarine part of the cable is 240 kilometres (149 mi) long and the land cable is 7 kilometres (4 mi) long.[2] There are converter stations in Morvedre and Santa Ponsa, built by Siemens.

COMETA is scheduled to become operational in 2011. The total cost of the project is €375 million.[4]


External links

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