Developers have proposed or are advancing about 290GW of wind projects, but only a minority will be built unless the grid is expanded, experts warn.
Most high-quality US wind resources are in regions far from load centres. America has about 265,000km of high-voltage (230kW and above) transmission lines in operation, but many are more than three decades old..
A Department of Energy report, Grid 2030: A National Vision for Electricity's Second 100 Years, says demand has risen by about 25% since 1990, but construction of transmission facilities has fallen by 30%..
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