Uprating an Overhead Line.Italian TSO Applications for Integration of RES

The increase of Renewable Energy Sources(RES) production units has caused significant changes in theelectrical system configuration. The existing structural assetisn’t adequate to dispatch these new power flows that, atsame time, should be favorite by various TSOs in order toobtain incentives. The outage of primary substations on thegrid and the increase of consumptions have caused growingload currents on existing overhead line. This paper, afterintroducing thermal resistant conductors and DynamicRating (DR) solutions, reports an applications used byTERNA Group S.p.A. (Italian TSO). These systems arealready installed on lines and they are contributing toincrease power flows thanks to raise by 10-30% of the realtime dynamic ratings than the static evaluations.Advantages for electrical systems are many such energyvectors optimizations, congestions reductions, reliabilityincreasing, cross-border power flows increasing, smart griddevelopment.