The new combined-cycle system is expected to become operational by 2025, TPP Varna said in a statement, reported news portal SeeNews.
The power plant said it signed a contract for the development of a technical-economic model for the project with three Russian companies: industrial valve products manufacturer Rakityanski Armaturny Zavod, steel pipe manufacturer Trubnaya Metallurgicheskaya Kompaniya and power engineering company Atomenergomash.
Each of the new steam-gas units will be equipped with a Siemens SGT5-2000E gas turbine, combined with a steam turbine, as well as the relevant electrical and auxiliary equipment. Varna TPP currently has three functioning units of 210 MW each using natural gas as their main fuel (Units 4, 5, 6).
Units 1, 2 and 3 became operational in 1968-1969 and were decommissioned in 2017. In 2018, Czech energy group ČEZ sold TPP Varna to Bulgarian logistics company Sigda.