A roundup of Latin America's top electric power sector news.
The second round attracted bids eight times greater than in the first round last year.
The winners in the process to supply over 400MW are scheduled to be announced in November.
According to treasury forecasts, winning bidders will pay some US$2.4bn for shares in the state-run power company's assets.
The Portezuelo del Viento hydroelectric dam is planned for Mendoza province.