Latest news

ESO Hosts the Annual Meeting of the Regional Coordination Center for Security of the Transmission Operators in the Southeastern Europе


Curtailment of the Net Transfer Capacity values:

Tenders and competitions

(Only in Bulgarian) Tenders and competitions for extraction and sale of timber in properties, forest territory with established real rights in favour of ESO EAD.

Buyer’s profile

(Only in Bulgarian)List of public procurement and qualification systems, market consultation, preliminary announcements

Electricity market

For free choice with care and responsibility!

Electricity System Operator


    Electricity System Operator is responsible for the joint operational coordination and control of the Bulgarian power system. It provides the operation, maintenance, repair and reliable functioning of the transmission network. The transmission operator is responsible for the joint operation of the electricity system with the electricity systems of the countries from synchronous zone Continental Europe and works on the electricity market coupling in the region.

National Dispatching Center

Finance and budget

Liberalized market;
Ancillary services;
REMIT reporting.


We take care to ensure that the electricity reaches you


We are investing efforts to ensure the electricity security and connectivity of Bulgaria

Metering and Information Technologies

Provision of information from electricity metering to users connected to the electricity transmission grid.

Market development

Through integration into a green future


International and European projects

    ESO EAD has a strategic role in achieving the national goals in the energy sector by 2030 and in the longer term by 2050. The company is developing in four main areas: modernization and digitalization, innovation, cybersecurity and human capital development. Part of the effective approach in determining the specific activities to achieve the goals are the company's participation in international projects and initiatives and the implementation of activities funded by national, European and other international programs.
Success Follows the Successful!

Who we are

Meet our team

Elektroenergien Sistemen Operator is the independent transmission system operator of the Republic of Bulgaria, engaged in managing and operation of the country’s high-voltage electricity transmission grid. The transmission operator guarantees responsibly and professionally the secure, reliable and uninterrupted electricity supply in the country, and also manages the transit of electricity flows through the territory of Bulgaria and parallel operation with the electricity systems of the countries in Continental Europe synchronous area. The company manages the country’s electricity transmission system ensuring its balanced and quality operation 24/7, 365 days a year.

ESO EAD is a sole-owner company whose single shareholder is the Bulgarian Energy Holding EAD. It was incorporated by Decision of Sofia City Court dated 4 January 2007. The Company is holder of an electricity transmission license No. Л-419-04/18.12.2013 issued by virtue of Decision No. Р-205 of 18 December 2013 by the State Energy and Water Regulatory Commission (SEWRC). By Decision No. С-5/30.07.2015 and Decision No. С-7/05.11.2015, EWRC certified ESO EAD as an independent operator of the electricity transmission system of the Republic of Bulgaria.


ESO EAD has a two-tier management structure and is governed by a Supervisory Board and Management Board, including the Executive Director and an executive member. The independent transmission operator manages and maintains more that 15 thousand km of power lines and 297 electrical substations. The electricity system operator and its employee experts are governed by the striving to optimize the functioning of the electricity transmission grid in the country by implementing projects for development, modernization and expansion with the construction of new facilities. The objective of the transmission operator’s investment policy is to guarantee the efficient and quality functioning of the Bulgarian electricity system.

Supervisory Board

Alexander Trichkov Evden Nikolov Kostadin Popov Plamen Radonov Andrey Valchev Iliyan Skarlatov Nikola Alimanski
Management Board

Anton Slavov Angelin Tsachev Plamen Yordanov


Registry office:

+359 2 9696 884,

+359 2 9696 887


Head office

201, Tsar Boris III Blvd.

City of Sofia 1618



Monday - Friday

8:00 - 17:00