Kii Channel HVDC system
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The Kii Channel HVDC system is at present the most powerful submarine cable high voltage direct current transmission system in the world. The Kii Channel HVDC system connects the static inverter plant at Anan on Shikoku with the static inverter plant at Kihoku on the island Honshū. Japan. The first step of the project went in service in 2000 with a bipolar voltage of 250 kV and rated to transmit 1400 megawatts. The first 50 km of the transmission line from the Anan inverter station are a submaring cable. At Yura there is a switching station where the line runs for the remaining 50 km as an overhead powerline.
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