Characteristics of Twelve-Phase Power Transmission

摘要

High phase order power transmission, particularly twelve-phase, is an option for maximizing power transfer over a right-of-way of given width. This report presents the result of an experimental and analytical program that included construction of a twelve-phase steel lattice portal tower with special insulators, construction of a twelve-phase substation, and subsequent energization of the world's first twelve-phase power transmission line. Impedances, electrial environmental effects (radio noise, audible noise, electric and magnetic fields), and single and three-pole switching are among the parameters measured and evaluated. The twelve-phase line design is compared with existing three-phase designs that are significantly larger for the same power transfer capability. It is concluded that twelve-phase transmission does perform as predicted and that it is an option where space is limited. (ERA citation 13:033506)