Transposition of transmission lines can reduce unbalanced currents. The software package will monitor and graphically display the feasible MW transfers constrained by both thermal and voltage limits as a function of inter-area imports. Having identified remaining transfer capacity of the transmission system, the operator can run the system closer to capacity. FPL investigation of dynamic rating of transmission line conductors. The resistance a conductor offers to the flow of electricity is inversely proportional to its cross-sectional area, i.e., the larger the diameter of the conductor, the less resistance the current will encounter.
Resistance is also a function of the type of material of which the conductor is made.
Thus, by replacing a conductor with one of a larger diameter or changing to a material which offers less resistance, power loss can be reduced when the same current is flowing through the conductor. Segmenting shield wires can also eliminate losses associated with loop flows through this path. Reconductoring existing lines is generally only cost-effective when a thermal capacity increase is needed. Not all utilities consider losses in the design of transmission lines. Pole, tower, and cross arm strength are a concern for existing lines.