The Kii Channel HVDC system in Japan is, as of 2012, the highest-capacity high-voltage direct current (HVDC) submarine power cable system in the world to use a single bipole, with a rated power of 1400MW.
The cross channel system between England and France has a larger total capacity, but uses two bipoles rated at 1000MW each.
The first stage of this project went in service in the year 2000 with a bipolar voltage of 250 kilovolts (kV) and rated to carry 1400 megawatts (MW).
The project contained several "firsts" when it was originally built, including:[1] The first 50 kilometers of the transmission line run north from the Anan inverter station as an undersea cable.
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