High-voltage direct current
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A high-voltage direct current system uses direct current and high voltages for electric power transmission. It contrasts with the more common alternating current transmission systems.
Long distance HVDC lines carrying hydroelectricity from Canada's Nelson River to this converter station where it is converted to AC for use in southern Manitoba's grid
The towers of the Pacific DC Intertie, the longest HVDC line in the United States.
HVDC in 1971: this 150 kV mercury-arc valve converted AC hydropower voltage for transmission to distant cities from Manitoba Hydro generators.
Pylons of the Baltic Cable HVDC in Sweden
Direct current
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Direct current is one-directional flow of electric charge. An electrochemical cell is a prime example of DC power. Direct current may flow through a conductor such as a wire, but can also flow through
High-voltage direct current
…A high-voltage direct current (HVDC) system uses direct current (DC) and high voltages (currently between 100 kV and 800 kV) for electric power transmission. It contrasts with the more common alternating current…
Brush Electric Company's central power plant with dynamos generating direct current to power arc lamps for public lighting in New York. Beginning operation in December 1880 at 133 West Twenty-Fifth Street, the high voltages it operated at allowed it to power a 2-mile (3.2 km) long circuit.