UP-rating 150 kV overhead lines with new heat-resistant conductors

The scenery resulting from the introduction of the free market of electric energy makes it more and more necessary to increase the power transferred by electric lines and consequently to obtain a better exploitation of the existing lines, given the difficulty to obtain permits to build new overhead lines or to modify substantially existing ones (as in the case of adoption of a larger conductor: i.e. from 308 mm² to 585 mm²).