By Yoon Sung-won
LS Cable & System (LS C&S) said Friday it will test the world's longest superconducting cable on Jeju Island.
The nation's leading electric cable maker said the new cable, which is 1 kilometer long and supports 154 kV of alternating current (AC), will be connected to the actual electricity grid at a superconductivity center on Korea's southern island for the next seven months. Once approved, this will be the longest cable that supports the highest current capacity in the world, surpassing a 600-meter cable in Long Island, New York, with 137kV capacity.
"The demonstration shows that we can commercialize the cable anytime we want," LS C&S CEO Yoon Jae-in said in a statement. "It took us 15 years to catch up with advanced countries and now we lead the industry by developing advanced technologies they've developed during the last 30 years."
The LS C&S CEO also pledged to enter the global energy market by joining international projects.
"We are participating in projects to commercialize our cable business overseas in countries such as India and the Netherlands," he said. "We will continue to push for the global market to take leadership of the next-generation energy market."
LS C&S started researching superconducting cables in 2011 and became the world's fourth company to develop one in 2014. In January 2015, it succeeded in the world's first demonstration of a 80kV direct current (DC) superconducting cable, becoming the only company with both AC and DC superconducting cable technologies.
The company stressed that superconducting cables are desirable especially in urban areas where electricity demand is skyrocketing but there isn't enough underground space to install cables. Simply by replacing existing copper wire with superconducting cable, it said, cities can boost their electricity capacity up to tenfold without having to build more infrastructure.
LS C&S also said electricity authorities can reduce the size of electric cable passages by 60 percent even when they have to build a new system. The superconducting cables also provide high electric power at a low voltage and thus do not need electric power stations, it added.