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The HVDC Volgograd-Donbass is a high voltage direct current line between the static inverter plants at Volzhskaya (situated near the hydro-electric power plant Volgograd) and Mikhailovskaya in the Donbass area, which went into service in 1964. It consists of a 475 kilometre long overhead line. The static inverters of the HVDC Volgograd-Donbass are equipped with mercury arc rectifiers for a voltage of 100 kV and a maximum current of 940 ampere, which were partly replaced at the beginning of the 90's by thyristors. The HVDC Volgograd-Donbass is a bipolar HVDC with an operating voltage of 400 kV. It can transfer a maximum power of 750 megawatts.
