High Voltage Direct Current
(HVDC)What does it do?
HVDC transmits great amounts of electrical power over long distances. Compared to alternating current, the direct current system is less expensive and loses less energy. HVDC can be transmitted through cables both underground and underwater.How does it work?
HVDC transmission utilizes a converter station at either end of the system. A mercury arc valve is used widely for the conversion of AC and DC current. The valve at the beginning of the system converts alternating current to HVDC, the HVDC travels to the next location through a cable, and the valve at the end of the system converts the HVDC back to alternating current.How will it be used in the future?
HVDC is being considered globally for renewable energy efforts. Since HVDC allows for more power to travel long distances with fewer lines and reduced losses, clean energy can efficiently travel to distant locations. Due to the large amounts of hydro-energy produced in Quebec, HVDC is being utilized in a transmission line linking Quebec to New York City.Related Subjects: History of Electrification, AC Power History