A far-reaching project and an exceptional reference for our company is the largest onshore wind farm in Europe, Fântânele-Cogealac, with a total installed capacity of 600 MW.
The project was carried out in two stages, each of which involved complex work from a technical and organizational point of view, from design to execution and commissioning of the wind farm's electrical networks.
The Fântânele Wind Farm was designed for a final power of 347.5MW, with a total of 139 turbines grouped in 4 areas: Fântânele E, Fântânele V1, Fântânele V2 and Fântânele V3. A 110/33kV substation equipped with an 80MVA transformer is built in each zone. All these stations are connected by a 110kV underground cable network to the main 110/400kV transformer station built in the Tariverde area. The 110/400 kV station is equipped with three 250MVA transformers.
The Cogealac Wind Farm, with a power of 226.5 MW, is connected by a 110kV underground cable network to the main 110/400kV transformer station in Tariverde. This wind farm has 101 turbines installed, connected by a 33 kV underground network to 3 110/33 kV transformer stations. As part of this large-scale project, ELM Electromontaj was responsible for the construction of the underground power stations and lines.
The works performed were of high complexity and consisted of the following:
- 33 kV cable installation, with sections from 95 mm2 up to 630 mm2, including optical fiber, which represents the links between the wind power plants and the 33/100 kV, 80 MVA lifting transformer stations, 350 km long;
- 110 kV cable installation, with 500 mm sections2 and 1000 mm2, including optical fiber, which represents the connections between the four lifting stations 33/10100 km, 80 MVA and the 110 kV station, 100 km long;
– execution of sleeves and terminal boxes 33 kV, 110 kV;
– installation of primary and secondary equipment in 4 33/110 kV transformer stations
