The Hainan Power Grid Co., Ltd has brought the first of four planned seabed electric cables onshore at Linshi Isle in Chengmai, a county in China’s southernmost island province of Hainan.
The 32 km long and 500 kV underwater cable, the longest of it’s kind in the world, was laid across the Qiongzhou Strait from Xuwen in Guangdong Province.
The cables, to be linked with the Fushan power transformer substation in Chengmai, are scheduled to be put into operation in April.
This is the second Hainan grid interconnection project launched by China Southern Power Grid, which will help double the power transmission capacity.
The project is expected to significantly reduce the risks of a massive power outage on the typhoon-prone island.
The Qiongzhou Strait has an average depth of 44 meters and a maximum of 110 meters, with complicated offshore conditions and high waves.
“We sent robots to operate underwater to avoid errors and damage to the existing cables,” said Huang Xianqiu, chief engineer of the project.