The electrical grid in the United States comprises all of the power plants generating electricity, together with the transmission and distribution lines and systems that bring power to end-use customers. The “grid” also connects the many publicly and privately owned electric utility and power companies in different states and regions of the United States. However, with changes in federal law, regulatory changes, and the aging of the electric power infrastructure as drivers, the grid is changing from a largely patchwork system built to serve the needs of individual electric utility companies to essentially a national interconnected system, accommodating massive transfers of electrical energy among regions of the United States.

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