T&D World Magazine

Siemens HVDC Converter Stations to Connect Majorca to Spanish Mainland

Siemens is delivering two converter stations for the new high-voltage direct current transmission link (HVDC) between Morvedre near Valencia and Santa Ponsa near Palma de Mallorca, connecting the Balearic island of Majorca with the Spanish mainland. From May 2011, the 250-km (155-mile) long, 250-kV HVDC submarine cable with a power capacity of 400 MW will provide the resort island with environmentally friendly and low-loss power supply from the Spanish mainland. The customer is Red Eléctrica de Espana (REE). The order volume for Siemens totals to about EUR 100 million.

The aim of the new high-voltage direct current link is to ensure a reliable power supply with minimal losses to the resort island of Majorca without building new power plants. Over 790,000 inhabitants live on Majorca, the largest of the Balearic islands, in addition up to seven million vacationers visit the island every year. Thanks to this first access to the electricity market on the Spanish mainland, the peak load demands of Majorca can be covered by electricity imports from the European power grid, especially during the main holiday season in the hot summer months. This will save emissions of over 1.2 megatons of CO2 per year.

The Siemens scope of supply comprises the delivery and installation of the HVDC converter station on a turnkey basis, as well as gas-insulated switchgear (GIS) and a highly integrated switching station (HIS) for connection to the network. The order also includes the core components such as Thyristor valves, converter transformers, smoothing reactors, protection and control systems and the AC and DC filters.

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