ABB has won a USD 180 million order from Terna SpA. The infrastructure will deliver a High Voltage Direct Current (HVDC) power system connecting the grids of Sardinia and peninsular Italy. The 1,000MW HVDC undersea link will carry surplus power between the Italian mainland at Latina and the island of Sardinia. The contract calls for ABB to design and deliver two converter stations, one in Fiume Santo, Sardinia, and the other in Latina, on the Italian mainland – both in existing 400kV substations. The stations include converter transformers as well as air-insulated and gas-insulated switchgear. ABB will produce the equipment at its factories in Sweden, Switzerland and Italy. The distance between the two converter stations is 420km. Power cables will be laid beneath the Tyrrhenian Sea at depths of up to 1,600m. In addition to handling the power exchange, this sophisticated HVDC system can stabilize voltages and frequencies on Sardinia. It will be a bipolar HVDC system using two cables. The first pole will be completed in 2008.
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