November/December 2007, Volume 65, Number 6
Power requirements on the electric grid are in constant flux, based on the demand of the devices connected to it. Demand varies, based on time of day, weather and other factors. Traditionally, supply is varied to meet the demand by increasing or decreasing electric generation capacity. Given the strain on the nation's electric grid, though, supply cannot always meet demand. As environmental pressures continue to limit options for meeting increasing electricity demand, interest in demand-response programs is growing.