Maritza Iztok – Maritza East III Line is a 400kV overhead line from Maritza Iztok, Stara Zagora, Bulgaria, to Maritza East III, Stara Zagora, Bulgaria.

The project, which is currently under construction, is expected to be commissioned in 2021.


Maritza Iztok – Maritza East III Line is an overhead line that will be operated by Electroenergien Sistemen Operator. The line will carry alternating current (AC) through double circuit cable.

The development of the Maritza Iztok – Maritza East III Line project has been approved by the State Energy Regulation Commission.

Maritza Iztok – Maritza East III Line project development status

The construction works on the Maritza Iztok – Maritza East III Line project were commenced in 2020 and commissioning is expected in 2021.

About Electroenergien Sistemen Operator

Electroenergien Sistemen Operator EAD (EOS), subsidiary of Natsionalna Elektricheska Kompania EAD, is the electricity system operator. The company plans, coordinates and controls electrical power system of the Republic of Bulgaria. EOS operates, maintains and monitors functioning of the power transmission network and auxiliary networks. Its National Dispatching Center operates the national power transmission system and performs the functions of centralized real time dispatching, control and supervision of the electrical power system. EOS is headquartered in Sofia , Bulgaria.


All publicly-announced T&D Line & Substation projects included in this analysis are drawn from GlobalData’s Power IC. The information regarding the projects is sourced through secondary information sources such as country specific utility players, company news and reports, statistical organisations, regulatory body, government planning reports and their publications and is further validated through primary from various stakeholders such as power utility companies, consultants, energy associations of respective countries, government bodies and professionals from leading players in the power sector.