Giving the Power Grid Some Backbone
The U.S. needs a high-voltage transmission system to deliver plentiful energy from wind and sunshine to power-hungry cities. At least one plan has emerged.
By Matthew L. Wald
Scientific American
A stiff wind blows year-round in North Dakota. In Arizona the sun beats down virtually every day. The U.S. has vast quantities of renewable electricity sources waiting to be tapped in these regions, but what it does not have there are power lines—big power lines that can carry the bountiful energy to distant cities and industries where it is needed.
The same is true beyond the windswept high plains and the sun-baked Mojave Desert: renewable supply and electricity demand are seldom in the same place, and too often the transmission lines needed to connect them are missing. The disparity exists even in New England, where hundreds of miles of high-tension wires supported by thousands of steel towers run neatly through dense areas of settlement. When Gordon Van Wiele, chief executive of ISO New England—in charge of transmission in the six-state region—unfurls a map of the land there, large ovals show the location of the best wind sites: Vermont near the Quebec border and eastern Maine spilling over into New Brunswick. But sure enough, no transmission lines transect them.
The U.S. has the natural resources, the technology and the capital to make a massive shift to renewable energy, a step that would lower emissions of greenhouse gases and smog-forming pollutants from coal-fired power plants while also freeing up natural gas for better uses. Missing is a high-voltage transmission backbone to make that future a reality. In some places, wind power, still in its infancy, is already running up against the grid’s limits. “Most of the potential for renewable resources tends to be in places where we don’t have robust existing transmission infrastructure,” Van Wiele says. Instead, for decades electric companies have built coal, nuclear, natural gas and oil-fired generators close to customers.
That strategy worked reasonably well until recently, when 28 state governments set “renewable portfolio standards” requiring their utilities to supply a certain portion of their electricity using renewables, such as 20 percent by 2020 or even sooner. But as Kurt E. Yeager, former president of the Electric Power Research Institute in Palo Alto, Calif., points out, such standards “aren’t worth the paper they’re written on until we have a power system, a grid, that is capable of assimilating that intermittent energy without having to build large quantities of backup power, fossil-fueled, to enable it.”
(More here.)
By Matthew L. Wald
Scientific American
A stiff wind blows year-round in North Dakota. In Arizona the sun beats down virtually every day. The U.S. has vast quantities of renewable electricity sources waiting to be tapped in these regions, but what it does not have there are power lines—big power lines that can carry the bountiful energy to distant cities and industries where it is needed.
The same is true beyond the windswept high plains and the sun-baked Mojave Desert: renewable supply and electricity demand are seldom in the same place, and too often the transmission lines needed to connect them are missing. The disparity exists even in New England, where hundreds of miles of high-tension wires supported by thousands of steel towers run neatly through dense areas of settlement. When Gordon Van Wiele, chief executive of ISO New England—in charge of transmission in the six-state region—unfurls a map of the land there, large ovals show the location of the best wind sites: Vermont near the Quebec border and eastern Maine spilling over into New Brunswick. But sure enough, no transmission lines transect them.
The U.S. has the natural resources, the technology and the capital to make a massive shift to renewable energy, a step that would lower emissions of greenhouse gases and smog-forming pollutants from coal-fired power plants while also freeing up natural gas for better uses. Missing is a high-voltage transmission backbone to make that future a reality. In some places, wind power, still in its infancy, is already running up against the grid’s limits. “Most of the potential for renewable resources tends to be in places where we don’t have robust existing transmission infrastructure,” Van Wiele says. Instead, for decades electric companies have built coal, nuclear, natural gas and oil-fired generators close to customers.
That strategy worked reasonably well until recently, when 28 state governments set “renewable portfolio standards” requiring their utilities to supply a certain portion of their electricity using renewables, such as 20 percent by 2020 or even sooner. But as Kurt E. Yeager, former president of the Electric Power Research Institute in Palo Alto, Calif., points out, such standards “aren’t worth the paper they’re written on until we have a power system, a grid, that is capable of assimilating that intermittent energy without having to build large quantities of backup power, fossil-fueled, to enable it.”
(More here.)
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