Electricity blackouts: A hot summer topic

Aug 09, 2006
Electricity blackouts: A hot summer topic
Satellite images show the New York City area about 20 hours before (left) and 7 hours after the blackout of Aug. 13, 2003. MIT economist Paul Joskow explains that such blackouts are usually caused by problems with power distribution and equipment, not power shortages. Image courtesy / NOAA

It is a common misperception that blackouts are caused by power shortages, but in any given year, about 90 percent of the power outages that customers experience are due to problems with the local distribution network, says an MIT professor.

Intense heat and record-breaking energy demand strained New England's electrical grid nearly to its limit on Wednesday, Aug. 2, but the regional system rose to the challenge, says an MIT professor who studies the economics of electricity distribution.

"They did really well in managing the system on a very difficult day," said Paul Joskow, the Elizabeth and James Killian Professor of Economics and Management.

Electricity demand in New England peaked at a record-high 28,021 megawatts on Aug. 2, according to ISO New England, the company that operates the region's electrical grid.

Unlike California, which endured a two-week heat wave that left many homes in the dark, New England was lucky that the mercury approached 100 degrees for only two days last week.

"If that (heat) had gone on for a week, they would have started having failures of equipment … and there might have been rolling blackouts," said Joskow, who is also director of the MIT Center for Energy and Environmental Policy Research.

To reduce the strain on the power grid, ISO New England offered payments to businesses willing to lower their electricity usage during the day. The company also bought electricity from Canada and directed excess power from Maine, the only New England state spared the heat crisis, to other states.

Last week's heat wave showed that the New England region has enough electricity to meet current peak demands, Joskow said, but no new plants are under construction, which could become a problem as electricity demand grows and as older, polluting plants need to be replaced.

"Demand continues to grow, especially peak demand on hot days, as more and more people put in air conditioning," he said.

Distribution problems

And even though the region generally produces enough electricity, blackouts often occur when the equipment that delivers electricity to neighborhoods and homes becomes overloaded. It is a common misperception that blackouts are caused by power shortages, but in any given year, about 90 percent of the power outages that customers experience are due to problems with the local distribution network, Joskow said.

For example, most of the recent blackouts in California, Missouri and New York City were caused by failures of distribution equipment due to high demand and extreme heat.

In New England, much of the distribution system was built in the 1960s and 1970s and is reaching the end of its useful life. Expenditures to replace aging equipment and to keep up with growing demand need to increase, he said. State regulators should create a robust regulatory framework that gives distribution companies sufficient resources and incentives to support these necessary investments, and consumers need to understand that they will have to pay for the associated costs, according to Joskow.

"As those facilities age and more and more demand is put on them, they're more prone to fail, especially during hot weather," Joskow said. "In the end, if your local distribution system fails, you don't get power, no matter how many generating plants there are in the region."

Source: MIT

Explore further: Electric car is time-beater at Pikes Peak climb event

Related Stories

Producing spin-entangled electrons

21 hours ago

A team from the RIKEN Center for Emergent Matter Science, along with collaborators from several Japanese institutions, have successfully produced pairs of spin-entangled electrons and demonstrated, for the ...

Optimizing shale gas production from well to wire

Jun 25, 2015

"Hydraulic fracturing" (or fracking) and "environmentally friendly" often do not appear in the same sentence together. But as the United States teeters on the precipice of a shale gas boom, Northwestern University professor ...

The infrastructure Australia needs to make electric cars viable

Jun 22, 2015

Tesla may have ambitious plans for battery technology for the home but it is also looking to upgrade its electric vehicle batteries, which will allow them to travel twice the distance they currently do. So what will be the implication ...

Recommended for you

Electric car is time-beater at Pikes Peak climb event

38 minutes ago

For optimists enjoying the technology progress of electric cars, an encouraging turn of events took place recently with electric cars in the top two finishing spots at the Pikes Peak International Hill Climb ...

Solar Impulse reaches half way in Japan-US leg

Jul 01, 2015

A solar-powered aircraft flying between Japan and Hawaii as part of a round-the-world bid passed the halfway point of the perilous Pacific Ocean crossing Wednesday, and smashed its own endurance record.

User comments : 0

Please sign in to add a comment. Registration is free, and takes less than a minute. Read more

Click here to reset your password.
Sign in to get notified via email when new comments are made.