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...Power plant --Generator...
Electricity starts at the power plant, produced by a spinning generator driven by various means: a hydroelectric dam, a large diesel engine, a gas turbine or a steam turbine. The steam is created by burning coal, oil or natural gas or by a nuclear reactor...
...Generator --Power plant...
...typically with green technologies like solar panels, windmills or hydroelectric turbines--usually use it only to supplement what they draw from the grid. Still, this can present a problem when the power they generate with their windmills or solar panels, combined with what they take from the local power plant, exceeds their needs. Historically, they would simply kick that extra juice back to the local power company, which would buy it back from them at far below market value. A new system has been enacted in 36 states to rectify that inequity. Under the plan, called net metering, a homeowner...
...terrorist threat? Not wanting to find out the hard way, power-industry executives have beefed up security since 9/11. But while key facilities are probably better protected, they are hardly foolproof. Attackers could break into a remote generating station and seize control, or cut through a fence to plant a time bomb during the night. "The bottom line is, it's pretty vulnerable," says a Senate energy expert. "There are key nodes out there that, if attacked, can knock out a pretty large section of the country...