In order to satisfy the increasingly higher requirements for ultra-long haul transmission in ultra-high voltage grid constructions

we propose a new technical approach:optical repeaters on transmission line towers.We analyze the theoretical basis for this approach

design the relevant technical scheme and realize the first pilot project of optical repeaters on transmission line towers in Shicheng-Huanxian section of the Hami-Zhengzhou fiber-optic communication project for ultra-high voltage DC power transmission.The section project has been cut over and operating steadily

verifying the feasibility of this solution.With the constant construction of power grids in China

this solution will find still wider applications.