400 kV Dobrudja–Burgas Transmission Line, Bulgaria November 30, 2018 | Europe Project Update The project involves the construction of an approximately 140-km-long, 400 kV, 1,500 MW transmission line between Dobrudja in northeastern Bulgaria and Burgas on the south coast of the Black Sea. This content is available to only paying subscribers. Username or E-mail Password Remember Me Forgot Password