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Unbridled Energy: Predicting Volatile Wind, Sun

Utilities Ramp Up Focus on Forecasting When Renewable Fuel Is at a Peak to Avoid Squandering Power That Still Can’t Be Stored

For more than a century, producing power has been a matter of flipping a switch. Need more electricity? Fire up some fuel. Need less? Dial the flame back down.

Things won’t be that easy in a world that gets much of its energy from renewable sources, which come and go at nature’s whim. Wind tends to blow hardest at night — a problem, since people use electricity mostly during the day. Sunshine can lose its intensity in seconds if eclipsed by a cloud — inconvenient for people who like their air conditioners to run steadily on summer days.

Full Story: http://online.wsj.com/article/SB125443333547957485.html?mod=WSJ_hpp_MIDDLENexttoWhatsNewsSecond

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