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*Virtual Power Plants* is a misnomer. Power isn't  added; demand is reduced.



On Tue, Jul 13, 2010 at 11:27 AM, Humphrey,Stephen R <[log in to unmask]>wrote:

>  During a few hours of last week's East Coast heat wave, thousands of
> megawatts worth of electricity--enough to power hundreds of thousands of
> homes--were temporarily removed from the grid, a practice grid operators
> expect to do more often to weather energy supply crunches on the grid.
>
> PJM, which operates the wholesale electricity market in 13 states, on
> Monday reported that it put into effect an "emergency" demand response
> program last week, tapping over 2,500 megawatts worth of energy reductions,
> dispersed over thousands of sites, to ensure that electricity flowed during
> times of peak demand.
>
> ..
>
> During a hot day in June, there were a number of failures at power plants
> and ISO New England had to call in contracts for efficiency services. One of
> those providers, *EnerNoc, said*<http://www.marketwatch.com/story/enernoc-responds-to-new-englands-largest-emergency-demand-response-dispatch-to-date-2010-06-25?reflink=MW_news_stmp>that it lowered electricity demand by 380 megawatts within a few hours. That
> reduction meant that ISO New England did not have to pay top dollar to
> purchase the energy needed to supply the region during a time of high
> demand, EnerNoc said.
>
>
>
> http://news.cnet.com/8301-11128_3-20010317-54.html
>
>
>
> Dr. Stephen R. Humphrey, Director,
> School of Natural Resources and Environment,
> Box 116455, 103 Black Hall, University of Florida
> Gainesville, FL  32611-6455  USA
> Tel. 352-392-9230, Fax 352-392-9748
> http://snre.ufl.edu
>
>
>