Ultra High Voltage Direct Current (UHVDC)

Advanced Energy Tech of the Week: High Voltage Direct Current Transmission

April 26, 2015 by Maria Robinson

HVDC Transmission

HVDC has been used for decades in underwater and underground transmission projects where AC use is limited, but its use in aboveground transmission is increasing, primarily for moving large amounts of remote wind and hydro power to distant load centers.[read more]

Energy From Wind Turbines Actually Less Than Estimated?

January 10, 2013 by Willem Post

Wind Turbine via Shutterstock

The capacity factors and useful service lives of industrial wind turbines are important determinants of levelized wind energy costs. Some recent studies have brought to light the capacity factors are less and useful service lives are shorter than typically used in spreadsheet-based analysis by IWT promoters to obtain bank financing and...[read more]

Why the Power Grid Should Go The Way of the Shuttle

September 25, 2012 by Christine Hertzog

The final voyage of the Endeavour made its way to San Francisco and Silicon Valley on September 21, 2012.  It was a gloriously beautiful day, and many people turned out to bid farewell to the fifth and final space shuttle.  The shuttle program lasted thirty years, and has a remarkable record of accomplishments, such as being...[read more]


HVDC Takes Offshore Wind Farther in Germany

July 9, 2012 by Helmuth Ziegler

Eugene Suslo/Shutterstock

Offshore wind energy is one of the big sources of hope for a successful clean energy turnaround in Germany. The existing wind parks in the North Sea and the Baltic Sea, however, have a performance of only 200 megawatts (MW) altogether - low compared to countries like Great Britain, with a current offshore performance of almost 1600 MW, or Denmark, with 850 MW.[read more]

Why is China Investing $3.7 Billion in Direct Current Transmission Lines?

May 16, 2012 by Nigel Morris

In the late 1880′s Thomas Edison and George Westinghouse waged “the War of Currents” , each battling to demonstrate the merits and advantages of Edison’s Direct Current distribution system and Westinghouse’s preffered Alternating Current distribution system.The quite bizarre antics that followed are the stuff of history now (and some...[read more]