WYSO

Summer Heat Puts Stress On New England Power Grid

Jul 22, 2011
Originally published on July 23, 2011 6:21 am

Sweltering heat continued Friday, moving from the Ohio Valley to the East Coast and straining regional power grids.

As temperatures head into near record-breaking territory, demand for power is also getting close to capacity, but authorities in New England say they don't expect to top the record usage set in the summer of 2006. And they're confident they can continue to meet demand.

It's as sure as spring turning to summer. Every time temperatures soar past 90 degrees, fans and conditioners fly off store shelves.

And if you add up all of the cooling power being used this week by countless residents in the region, it could amount to trouble.

"The utility operators are sweating bullets right now. Not because it's hot — they're sweating but because they're concerned about possibilities of failures," says MIT professor James Kirtley.

He says old infrastructure — especially around the Northeast — is prone to breakdowns and overloads. And he says distributing power in this kind of heat can pose extra challenges.

"Because materials expand when it gets warm, that means the transmission line is going to sag, and when a transmission line contacts a tree, you have to shut it down," he says.

ISO New England, the region's electric system operator, is watching for trouble spots and making sure the energy grid keeps humming.

Backup Sources

Officials say they have enough backup sources to ensure supply. But just in case, utilities are also working on new ways to try to ratchet down demand.

"When the utilities have called on all of their resources, and there's nothing else left, they are going to press the panic button. And that's where EnerNOC comes in, and we'll make the electricity usage disappear," says Tim Healy, who works for EnerNOC, a company that's been offering utility operators a relatively new kind of insurance policy.

When demand starts to peak, EnerNOC signals thousands of large-scale businesses to dial down their usage.

The company has cut deals with hotels, libraries, and manufacturers — like Okay Industries in New Britain, Conn., where Ed Tremblay is the maintenance supervisor.

"We can shut down a couple of blowers, a couple of electric ovens and we will then, in certain areas, let the air conditioning go up to 80, 82 degrees," he says. "And unfortunately for employees here, that's where it becomes a little more difficult."

On the upside, companies get paid for their reductions, and they get credit for making the sacrifice so individual consumers don't have to.

"Asking consumers to voluntarily conserve is one of the last steps we take," says Marcia Blomberg, a spokeswoman for ISO New England.

Which is no surprise. Heat waves have a way of making people cranky at the very suggestion.

"No, thank you," says Rich Grant, who was sweating outside of a Home Depot. "If you like the heat, go outside."

Arthur Patvee agrees. "This is America. We live in comfortable country," he says while piling a new air conditioning unit into his car. "So this is what it is."

Utility companies say the peak demand will be manageable during this heat wave, as long as it stays just a little shy of peak capacity.

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From NPR News, this is ALL THINGS CONSIDERED. I'm Robert Siegel.

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And I'm Michele Norris.

And the heat goes on and the sweltering temperatures are rising up and down the East Coast, and they're straining regional power grids. Authorities in New England say they don't expect to top the usage records set in the summer of 2006.

NPR's Tovia Smith reports on efforts in Boston to make sure that doesn't happen.

TOVIA SMITH: It's as sure as spring turning to summer. Every time temperatures soar past 90, fans and conditioners fly off store shelves.

Ms. MILLIE DELEVIN: We got fans.

SMITH: So you got three fans.

Ms. DELEVIN: Three fans, yeah.

SMITH: A case of water.

Ms. DELEVIN: Water.

SMITH: You're going to go home and plug in?

Ms. DELEVIN: Exactly.

Ms. NUNAI HYCOPEAN: We're looking for a room air conditioner.

SMITH: How many are running at home now?

Ms. HYCOPEAN: Two are running.

SMITH: And you want more.

Ms. HYCOPEAN: Yeah.

Mr. SARGIS CARAPADIAN: Yes. We have to have it.

SMITH: If you add up all of the cooling power being used this week by Millie Delevin(ph), Nunai Hycopean(ph), Sargis Carapadian(ph), and countless others in the region, it could amount to trouble.

Professor JAMES KIRTLEY (Electrical Engineering, MIT): The utility operators are sweating bullets right now. And it's not they're sweating because it's hot. It's that they're sweating because they're concerned about possibilities of failures.

SMITH: MIT Professor James Kirtley says old infrastructure, especially around the Northeast, is prone to breakdowns and overload. And he says distributing power in this kind of heat can pose extra challenges.

Prof. KIRTLEY: Because materials expand when it gets warm, that means that the transmission line is going to sag. And when a transmission line contacts a tree, you have to shut it down.

SMITH: ISO New England, the region's electric system operator, is watching for trouble spots and trying to ensure the energy grid keeps humming. Officials say they have enough backup sources to ensure supply. But just in case, utilities are also working on new ways to ratchet down demand.

Mr. TIM HEALY (CEO, EnerNOC): When the utilities have called on all of their resources and there's nothing else left, they're going to press the panic button. And that's where EnerNOC comes in, and we'll make electricity usage disappear.

SMITH: That's Tim Healy from EnerNOC, a company that's been offering utilities a relatively new kind of insurance policy. When demand starts to peak, EnerNOC signals thousands of large-scale businesses to dial down their usage.

They've cut deals with hotels, libraries, and manufacturers like Okay Industries in New Britain, Connecticut, where Ed Tremblay is the maintenance supervisor.

Mr. ED TREMBLAY (Maintenance Supervisor, Okay Industries): We can shut down a couple of blowers, a couple of electric ovens. And we will then, in certain areas, set the air conditioning to go up to 80, 82 degrees. And unfortunately for the employees here, that's where it becomes a little more difficult.

SMITH: On the upside, companies get paid for their reductions, and they get props for making the sacrifice so individual consumers don't have to.

Marcia Blomberg is spokesperson for ISO New England.

Ms. MARCIA BLOMBERG (Spokesperson, ISO New England): Asking consumers to voluntarily conserve is one of the last steps that we take.

SMITH: And no surprise, heat waves have a way of making people cranky at the very suggestion.

Mr. RICH GRANT: No, thank you. You like the heat, go outside.

SMITH: That's Rich Grant, sweating outside a Home Depot, not far from Arthur Patyee who was piling a new AC unit into his car.

Mr. ARTHUR PATVEE: This is America. We live in a comfortable country. So this is what it is.

SMITH: Utilities say the peak demand will be manageable this heat wave, as long as it stays just a little shy of peak capacity.

Tovia Smith, NPR News, Boston. Transcript provided by NPR, Copyright NPR.