Ricerc@Sapienza

Active power flows of a meshed grid can be controlled by varying the longitudinal reactance of some network branches through reactive components of fixed impedance: in particular, series capacitors can be used to increase power transfer capacity of underused grid portions, by realizing an optimal operation of the infrastructure. This paper presents a specific application of series compensation together with reconductoring: the power transfer capacity of the 250 km long, 230 kV-50 Hz transmission line under study is actually restricted by its low thermal rating.

Along the Adriatic coast, the Italian transmission system consists of a single 400 kV North-South Line. This limits the power transfer capacity between the Center North and Center South market zones and with the risk of overload in case of high renewable generation in Southern Italy. The year 2019 Network Development Plan foresaw the installation of a submarine High Voltage Direct Current (HVDC) line between the Fano (Center North) and Villanova (Center South) substations, in order to overcome environmental and social constrains and allow a full integration of Southern renewable sources.