Abstract:

Transmission line corridor has become a prominent problem that restricts power grid construction. In the economically developed regions, vertically arranged F-type tower could be applied to reduce the corridor occupied and the difficulty of project construction. F-type tower had a successful application in the Three Gorges-Shanghai ± 500 kV transmission line project, but it was firstly used for UHV transmission line. Because of higher voltage level and larger transmission capacity, the electromagnetic environment, conductor section, and tower loads are greatly different from those in original design. Through the monographic study of UHVDC transmission lines with vertically arrangement, the basic principles of the conductor arrangement type, conductor’s minimum distance from ground, and corridor width of the F-type tower with vertical arrangement were determined, and the optimization scheme was proposed combined with the actual issues in the project.

Key words: UHVDC, power transmission line, vertical arrangement, electromagnetic environment, design optimization