The Wando-Jeju submarine cable construction project connects Wando County in South Jeolla Province to Jeju with a submarine power grid of about 90 kilometers.
Jan 9, 2025
LS Cable & System has successfully completed South Korea’s first voltage-type high-voltage direct current (HVDC) project by constructing a submarine power grid of about 90 kilometers, connecting the mainland with Jeju Island.
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The South Korean cable solution provider said the milestone, achieved in collaboration with LS Marine Solution, marked a significant advancement in the nation’s energy infrastructure.
The Wando-Jeju submarine cable construction project connects Wando County in South Jeolla Province to Jeju, enhancing the island’s power supply and integrating renewable energy sources more efficiently.
It is the first project in the country to use voltage-type HVDC technology, which converts alternating current (AC) power into direct current (DC) power, allowing for long-distance, high-capacity transmission with minimal power loss and no electromagnetic wave generation, thus minimizing environmental impact.
Voltage-type HVDC, in particular, enabled bidirectional transmission, enhancing the efficiency of the power grid by integrating irregular renewable energy sources. It further allows real-time control of the direction of electricity supply and quick restoration of electricity during system failures.
As per LS C&S, it has won a plaque of appreciation in recognition of its successful performance and contribution to the stabilization of the power grid during the completion ceremony held at the Dongjeju Conversion Center in Jeju City.
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The three-linked Jeju project began in 2020, after LS Cable & System won a bid worth approximately USD 157.43 million in an international tender by Korea Electric Power Corp (KEPCO).
