Power Grids

Yesterday, New Englanders set a record for utilities usage, according to ISO New England, which oversees the generation and transmission of electricity in a six-state region. Utilities experiencing unusual demand for power have always been able to purchase excess power generated by neighboring utility companies. But now power companies are buying on the deregulated wholesale electricity market from anywhere in the country where excess power exists. NPR's Ivan Amato explains the technology that makes such an open market possible.



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