HVDC link to join Italy with Sardinia
An
ABB Power Technologies product story
Edited by the Engineeringtalk editorial team
Jun 9, 2006
ABB has won a $180 million order from Terna to deliver a high voltage direct current power system connecting the grids of Sardinia and peninsular Italy.
ABB has won a $180 million order from Terna, a leading energy company that operates the Italian transmission system.
The infrastructure will deliver a high voltage direct current (HVDC) power system connecting the grids of Sardinia and peninsular Italy.
The 1000MW HVDC undersea link will carry surplus power between the Italian mainland at Latina and the island of Sardinia.
Italy is one of the world's biggest importers of electrical power and the connection will be able to deliver electricity for one million homes.
"ABB's cutting-edge HVDC technology creates a vital link to ensure the grids of Sardinia and the Italian mainland are supplied with reliable electrical power as needed", said Samir Brikho, head of ABB's Power Systems Division.
"The system also contributes to the necessary upgrade of an expanded Europe's transmission infrastructure by creating another interconnection to facilitate the exchange of electrical power".
The contract calls for ABB to design and deliver two convertor stations, one in Fiume Santo, Sardinia, and the other in Latina, on the Italian mainland - both in existing 400kV substations.
The stations include convertor 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 convertor stations is 420km.
Power cables will be laid beneath the Tyrrhenian Sea at depths up to 1600m.
In addition to handling the power exchange, this sophisticated HVDC system can stabilise voltages and frequencies on Sardinia.
It will be a bipolar HVDC system using two cables.
The first pole will be completed in 2008.
This will be the third HVDC project delivered by ABB to Italy.
The most recent interconnection between Italy and Greece was completed in 2001.
In late 2004, ABB began work on the world's longest undersea power interconnection - the 580km-long NorNed link - that joins power grids in the Netherlands and Norway.
In 2005, ABB began work on Estlink, a 100km undersea and underground interconnection, joining power grids in Finland and Estonia.
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