 Power is distributed over multiple 500 kilovolt ( kV ) transmission lines . Three Direct current ( DC ) lines to the East China Grid carry 7 @,@ 200 MW : Three Gorges – Shanghai ( 3 @,@ 000 MW ) , HVDC Three Gorges – Changzhou ( 3 @,@ 000 MW ) , and HVDC Gezhouba – Shanghai ( 1 @,@ 200 MW ) . The alternating current ( AC ) lines to the Central China Grid have a total capacity of 12 @,@ 000 MW . The DC transmission line HVDC Three Gorges – Guangdong to the South China Grid has a capacity of 3 @,@ 000 MW . 
