An electric power system consists of generation, transmission and distribution of electric energy. Transmission lines are used to transmit electric power to distant large load centers. Over the past few decades, the rapid growth of electric power systems has resulted in an increase in the number of lines in operation and their total length
Further, the power transfer capability of a line depends upon the voltage and the cross section of the line conductor. The latest technological development in the design and manufacture of power line conductors makes it possible to enhance the power transfer capability by retaining the geometrical dimensions and mechanical properties of the conventional conductors or little modification.