All cable-related works on the NordBalt power interconnection have been completed

Monday, 21 September 2015

All cable-related works on the NordBalt power interconnection have been completed in the Baltic Sea. The 400 km long submarine cable connecting Lithuania and Sweden has been protected from vessel anchors and fishing equipment along its most vulnerable sections. Works on cable deepening and protection with stone rubble placed to cover the cable were launched in mid-May this year. 95 percent of the NordBalt power interconnection with Sweden construction works has been completed, Litgrid reports.

"According to our estimations and based on the experience of our partners at Svenska Kraftnat, that owns four similar cables, investments into cable protection do pay off. If the cable was damaged by an anchor or fishing equipment, it would take up to three months to repair, meaning that no power would be transferred via the interconnection during the repair works. Such an accident would influence the prices on the power market, given that the NordBalt interconnection has the capacity to satisfy almost all Lithuanian electricity demand on a warm summer day," said Daivis Virbickas, Chairman of the Board and CEO of Litgrid, the Lithuanian electricity transmission system operator.

The experience of submarine interconnection operators has shown that cables are usually subjected to physical damage caused by fishing equipment, such as bottom trawls that are drawn along the bottom, scraping it. If such equipment enters deeper into the seabed, it may catch on the cable as well. A certain amount of risk is also posed by larger vessels with powerful anchors that can cut off the cable or damage its armour.

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