Reuters cited the state-owned project company Hidro Tarnita as saying that the names of the short-listed firms will be revealed later.
The plant, which is expected to cost more than $1.1bn, will feature four reversible pump-turbines of 250MW each, reports SeeNews Renewables.
A study by consultancy A.T. Kearney and Fondul Proprietatea shows that over the next ten years, demand for electricity is likely to grow by less than 1%.
