CEZ did not disclose details of the bid in its statement.
In June, CEZ said the new 400 to 500 megawatt block would be gas- or coal-fired.
Last week, CEZ bid to become a strategic partner with Termoelectrica to modernise a 535 MW power plant and possibly build a new plant in Galati.
In November, CEZ was selected as one of the partners to build two 720 megawatt units in a joint venture with Societatea Nationala Nuclearelectrica at the existing Cernavoda plant, a project valued at 2.2 bln eur.
CEZ already owns Romania's national energy distribution company Electrica Oltenia, which had operating profit of around 2 bln crowns in 2006.