Question:

How do power grids work?

Power grids are the overhead high-voltage transmission lines that criss-cross our nations. This interconnected network enables multiple generators to feed this grid simultaneously, allowing utilites to buy and sell power a least cost.

Often running along highways and railroad easements, these grids act as the freeway for electrons for delivery of electrical power from generation sources through high-voltage transmission lines, sub-stations, and transformers to customers in cities and industry.

Interconnected grids enable power to be transferred from one region to another — leveling loads between time zones and the seasonal variations between north and south. Today, 100 nations are interconnected across borders, taking advantage of these benefits to neighboring countries.

Related Issues:

August, 2003 Blackout of northeast United States and Canada (145kb swf)

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