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08-12-2007, 08:36 PM
An extra-high voltage transmission line proposed to run 250 miles across West Virginia received approval June 22 from regional grid manager PJM Interconnection.
Dubbed the Potomac-Appalachian Transmission Highline, the line would extend from the John Amos substation in Putnam County to the Bedington substation in the Eastern Panhandle and east from there to Kemptown, Md. 290 miles in total.
The "PATH," 765 kilovolts for most of its length, would cross at least 12 West Virginia counties.
It would be constructed for a June 2012 completion date under a joint venture between American Electric Power and Allegheny Energy, the two utilities announced in April.
This is the second transmission line PJM has directed to cross West Virginia in the past year.
Last summer, PJM approved a 500-kV Allegheny Energy line from southwestern Pennsylvania across West Virginia to Virginia. Called the Trans-Allegheny Interstate Line, or "TrAIL," the 114-mile West Virginia portion crosses six northern counties and has met with strong opposition. It is in process with the state Public Service Commission.
Blackouts Foreseen
With growing demand for electricity in the East, PJM's annual Regional Transmission Expansion Plan, or RTEP, sees the grid becoming over-loaded - resulting in blackouts, according to Michael Kormos, senior vice president for reliability services.
"There were approximately 13 high-voltage transmission lines that we saw overloading as early as 2012," Kormos said in a conference call about the RTEP approval. "The grid is not able to carry the flow that we modeled."
RTEP planners look 15 years into the future, seeking to predict changes in load and to evaluate possible needs.
"We looked at different upgrades that could be done," Kormos said. "The Amos-to-Kemptown line was by far the best at relieving those overloads."
Benefits and Costs
But while the primary motivation for the line, PJM officials said, is grid stability, money is another important aspect.
Who benefits? And who pays?
Along with another line approved last week by PJM, this line is expected to reduce the cost of providing electricity to eastern power consumers.
"These two new lines ... have the secondary benefit of resolving about $450 million in annual congestion costs," said PJM president and CEO Phillip G. Harris on announcing approval of the RTEP.
Those congestion costs result, in general, when Eastern demand is met through local but expensive natural gas-fired generation rather than through in-expensive Midwestern and Appalachian coal-fired power.
"Eastern coastal heat waves are the most difficult situations," explained Mike Bryson, PJM manager of dispatch operations. When air conditioners run on high across the East, transmission
West Virginia Gov. Joe Manchin sent a letter to FERC June 15 protesting the decision.
"West Virginians have always been proud to take the lead in powering this country," Manchin wrote, "but to expect them to do the heavy lifting of generating and delivering so much of America's power and then pay for others' use of the power is simply unfair."
Some Factors Not Considered capacity across the mountains becomes jammed, and the power demand has to be met locally.
So these costs show up as higher rates for eastern power users.
Yet it's unclear where congestion savings would show up. Any cost reduction, should one result, might benefit the eastern users, the providers that serve them or both.
"Wholesale prices in the east potentially could be lower," said PJM's Kormos. "But it's based on forecasted conditions, so a lot of it will depend on fuel costs five to six years from now and how those costs get allocated is up to the utilities."
What is clear is who will pay the $1.8 billion cost of the line: all power users in PJM's 13-state territory, West Virginians included.
An April decision from the Federal Energy Regulatory Commission ordered the cost of new transmission at or more than 500 kV would be shared by all users in the region.
For the shorter 500-kV TrAIL, that is estimated at $0.90 per month for Allegheny Power residential customers and $0.35 for other West Virginia residential customers. Charges for this longer, bigger line may be higher.
Opponents of the TrAIL, where Allegheny Energy's preferred route would cross and be visible from many homes and private properties, have argued that Eastern power demand should be met through new generation capacity in the East.
At the national level, some have faulted a grid planning process that simply assumes both demand growth and insufficient generation in the East.
"Building (these two lines in West Virginia) will make these assumptions self-fulfilling prophecies," wrote Environmental Defense and the Clean Air Council in a comment letter on the RTEP.
Some also have questioned the wisdom of planning transmission investments around coal as an economical fuel just as Congress prepares to take on carbon di-oxide regulation later this summer - a move that would raise the cost of coalfired generation.
These considerations are not part of PJM's RTEP process.
"On the reliability analysis we did, we don't look at fuel type," Kormos said. "We're simply looking at where is existing excess generation, where is the load, and can the system in fact deliver it?"
The routing study and environmental assessment stage should take about a year, according to AEP spokesperson Melissa McHenry. The next step would be to apply to the PSC for approval to site the line.
The PSC may not have the final word, however. A National Interest Electric Transmission Corridor recently proposed by the Department of Energy encompasses 38 West Virginia counties, including those that would be crossed by the PATH. If finalized as proposed, then FERC will have eminent domain authority to site the line should the PSC delay or deny approval.
Copyright State Journal Corporation Jun 29, 2007
(c) 2007 State Journal, The. Provided by ProQuest Information and Learning. All rights Reserved.
Dubbed the Potomac-Appalachian Transmission Highline, the line would extend from the John Amos substation in Putnam County to the Bedington substation in the Eastern Panhandle and east from there to Kemptown, Md. 290 miles in total.
The "PATH," 765 kilovolts for most of its length, would cross at least 12 West Virginia counties.
It would be constructed for a June 2012 completion date under a joint venture between American Electric Power and Allegheny Energy, the two utilities announced in April.
This is the second transmission line PJM has directed to cross West Virginia in the past year.
Last summer, PJM approved a 500-kV Allegheny Energy line from southwestern Pennsylvania across West Virginia to Virginia. Called the Trans-Allegheny Interstate Line, or "TrAIL," the 114-mile West Virginia portion crosses six northern counties and has met with strong opposition. It is in process with the state Public Service Commission.
Blackouts Foreseen
With growing demand for electricity in the East, PJM's annual Regional Transmission Expansion Plan, or RTEP, sees the grid becoming over-loaded - resulting in blackouts, according to Michael Kormos, senior vice president for reliability services.
"There were approximately 13 high-voltage transmission lines that we saw overloading as early as 2012," Kormos said in a conference call about the RTEP approval. "The grid is not able to carry the flow that we modeled."
RTEP planners look 15 years into the future, seeking to predict changes in load and to evaluate possible needs.
"We looked at different upgrades that could be done," Kormos said. "The Amos-to-Kemptown line was by far the best at relieving those overloads."
Benefits and Costs
But while the primary motivation for the line, PJM officials said, is grid stability, money is another important aspect.
Who benefits? And who pays?
Along with another line approved last week by PJM, this line is expected to reduce the cost of providing electricity to eastern power consumers.
"These two new lines ... have the secondary benefit of resolving about $450 million in annual congestion costs," said PJM president and CEO Phillip G. Harris on announcing approval of the RTEP.
Those congestion costs result, in general, when Eastern demand is met through local but expensive natural gas-fired generation rather than through in-expensive Midwestern and Appalachian coal-fired power.
"Eastern coastal heat waves are the most difficult situations," explained Mike Bryson, PJM manager of dispatch operations. When air conditioners run on high across the East, transmission
West Virginia Gov. Joe Manchin sent a letter to FERC June 15 protesting the decision.
"West Virginians have always been proud to take the lead in powering this country," Manchin wrote, "but to expect them to do the heavy lifting of generating and delivering so much of America's power and then pay for others' use of the power is simply unfair."
Some Factors Not Considered capacity across the mountains becomes jammed, and the power demand has to be met locally.
So these costs show up as higher rates for eastern power users.
Yet it's unclear where congestion savings would show up. Any cost reduction, should one result, might benefit the eastern users, the providers that serve them or both.
"Wholesale prices in the east potentially could be lower," said PJM's Kormos. "But it's based on forecasted conditions, so a lot of it will depend on fuel costs five to six years from now and how those costs get allocated is up to the utilities."
What is clear is who will pay the $1.8 billion cost of the line: all power users in PJM's 13-state territory, West Virginians included.
An April decision from the Federal Energy Regulatory Commission ordered the cost of new transmission at or more than 500 kV would be shared by all users in the region.
For the shorter 500-kV TrAIL, that is estimated at $0.90 per month for Allegheny Power residential customers and $0.35 for other West Virginia residential customers. Charges for this longer, bigger line may be higher.
Opponents of the TrAIL, where Allegheny Energy's preferred route would cross and be visible from many homes and private properties, have argued that Eastern power demand should be met through new generation capacity in the East.
At the national level, some have faulted a grid planning process that simply assumes both demand growth and insufficient generation in the East.
"Building (these two lines in West Virginia) will make these assumptions self-fulfilling prophecies," wrote Environmental Defense and the Clean Air Council in a comment letter on the RTEP.
Some also have questioned the wisdom of planning transmission investments around coal as an economical fuel just as Congress prepares to take on carbon di-oxide regulation later this summer - a move that would raise the cost of coalfired generation.
These considerations are not part of PJM's RTEP process.
"On the reliability analysis we did, we don't look at fuel type," Kormos said. "We're simply looking at where is existing excess generation, where is the load, and can the system in fact deliver it?"
The routing study and environmental assessment stage should take about a year, according to AEP spokesperson Melissa McHenry. The next step would be to apply to the PSC for approval to site the line.
The PSC may not have the final word, however. A National Interest Electric Transmission Corridor recently proposed by the Department of Energy encompasses 38 West Virginia counties, including those that would be crossed by the PATH. If finalized as proposed, then FERC will have eminent domain authority to site the line should the PSC delay or deny approval.
Copyright State Journal Corporation Jun 29, 2007
(c) 2007 State Journal, The. Provided by ProQuest Information and Learning. All rights Reserved.