High-voltage direct current - Wikipedia, the free encyclopedia
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The advantage of HVDC is the ability to transmit large amounts of power over long distances with lower capital costs and with lower losses than AC. Depending on voltage level and construction details, losses are quoted as about 3% per 1,000 km.[14] High-voltage direct current transmission allows efficient use of energy sources, remote from load centers.
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Re the smart grids - it is already working in some places. Of course it cannot shift ALL demand or even MOST of the demand - but it does not have to, because while there are fluctuations in power supply that is combined from solar, wind and water, they are on average (e.g. taking all of Europe as a unified grid) not that huge. Electric cars are also an interesting option as distributed energy storage. Of course people would also have to have the opportunity to plug them in at work, not only at home to make that capacity available. Using renewable energy will not come without some changes in peoples daily lives and without some investment. But honestly to install some more charge plugs at workplaces is not that much of an investment compared to lets say building new power plants or electrical grids.
06-04-2012, 10:22 AM
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