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13 February 2007 - China has commenced construction on the world's longest cross-sea power grid connection.
The link will transmit electricity between coastal Guangdong Province and Hainan Island in the country's south. The 500 kV power pathway will cross the Qiongzhou Strait, connecting the Gangcheng transformer substation in Guangdong's Zhanjiang City and the Fushan transformer substation in the island's Chengmai County.
The investor, China Southern Power Grid Corporation, will use 144km long wires to connect the two systems. The lines will cost 2.1bn yuan (US$271m) and are expected to be put into service in the first half of 2009.
"The Hainan power grid has long been isolated from the other grids. The project will unify the five power grids in south China," said Yuan Maozhen, board chairman of China Southern Power Grid. "The power grids can transmit electricity to each other after the connection project is completed. It will improve Hainan power grid's safety and efficiency," Yuan said.
State-owned China Southern Power Grid covers the provinces of Guangdong, Yunnan, Guizhou and Hainan and the Guangxi Zhuang Autonomous Region, providing electricity to 230m people.
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