Principles and Analysis of ACSR with Two Mixed Layers

A new design of aluminum conductor, steel reinforced (ACSR) which combines greater strength than conventional single-layer ACSR with lower losses is described. This design incorporates intermixed aluminum and steel wires in the two outer layers. In this way it is possible to reduce iron losses considerably. The new type of conductor should be useful in very long spans, e.g., in river crossings. A method of analysis useful for predicting electrical performance of such conductors with conventional ACSR as a limiting case is given. This method employs both analog and digital techniques first to determine the nature of the interactions between currents in various parts of the conductor and subsequently to solve for the current distribution in it. The conductor power loss and resistance are then readily determinable.