LS Cable & System (LS Cable) has completed a high-voltage direct current transmission (HVDC) submarine cable project on a volcanic island in South Korea.

Per the company, the Wando-Jeju project was an undersea power grid of about 90 km that connects Wando, Jeollanam-do and the island of Jeju. The project, worth $160 million, is the largest LS Cable submarine cable project since the Jeju 2-linked contract in 2009.

The project was the first in the country to use voltage-type HVDC technology, which allows for real-time control of the direction of electricity supply and quick restoration of electricity during system failures, the release said. The submarine cables allow electricity to be supplied in a more stable manner by increasing the amount of electricity that is available between Jeju and the inland.

The company notes that only some companies in Europe and Japan have commercialized HVDC submarine cables worldwide, and LS Cable is the only one in South Korea. “The completion of the three-connection in Jeju is the achievement of Team Korea, which has been achieved through cooperation between domestic companies such as LS Cable, LS Marine Solution, and construction companies, centering on KEPCO,” said Kim Hyung-won, head of LS Cable & System’s energy and construction business division.