Associated Press, Oregonian
July 24, 2008
Link to original article
Which draws more juice from the electric grid, a big-screen plasma television or recharging a plug-in hybrid car?
The answer is the car. But the electricity drawn by plasma televisions is easing the minds of utility company executives across the nation as they plan for what is likely to be a conversion of much of the country's vehicle fleet from gasoline to electricity in the coming years.
Rechargeable cars, industry officials say, consume about four times the electricity as plasma TVs. But the industry already has dealt with increased electric demand from the millions of plasma TVs sold in recent years. Officials say that experience will help them deal with the vehicle fleet changeover.
So as long as the changeover from internal combustion engines to electric vehicles is somewhat gradual, they should be able to handle it in the same way.
That's the word from Mark Duvall, program manager for electric transportation, power delivery and distribution for the Electric Power Research Institute. He spoke this week at a conference on electric vehicles in San Jose.
"We've already added to the grid the equivalent of several years' production of plug-in hybrids," Duvall said. "The utilities, they stuck with it. They said, 'All right, that's what's happening. This is where the loads are going, and we're going to do this.' "
Automakers, such as General Motors Corp. and Toyota Motor Corp., are planning to bring rechargeable vehicles to the market as early as 2010.
But speakers at the Plug-In 2008 conference say it will take much longer for them to arrive in mass numbers, due in part to a current lack of large-battery manufacturing capacity.
Auto and battery companies still are working on the lithium-ion battery technology needed for the cars, and on how to link the battery packs to the vehicles.
Steve Corson, spokesman for Portland General Electric, said the utility is looking at ways to accommodate a big increase in electric vehicles. "We're putting together a pilot project to see how the infrastructure will work to support these vehicles," Corson said.
Since power generated by wind cannot be stored, Corson said that charging cars at night could have the positive effect of using wind power that would otherwise be wasted.
"If electric cars are adopted on a widespread basis, they could be a demand on the system. But they also could be a resource for the system -- they could store electricity at night, for example, storage that could provide a way for us to use wind capacity to the best advantage," he said.
Tom Gauntt, spokesman for Pacific Power, said the expected growth in electric vehicles is not an immediate concern.
"Hypothetically, if a 1,000 cars came on at once that would be a problem," Gauntt said. "It doesn't happen in one day, so you can see these things coming."
Utility officials say they already are coping with increased demand, especially during peak-use periods in the afternoon and early evening. But the rest of the day, most utilities have excess generating capacity that could be used to recharge cars.
But the preparation doesn't mean electric vehicles will be accommodated without problems and good planning, the officials say.
Since most electric cars will likely be charged during off-peak electric use times, utilities should have no problem generating enough electricity.
But since people with the means to buy electric cars likely will live in the same areas, utilities worry about stress on their distribution systems, said Efrain Ornelas, environmental technical supervisor with Pacific Gas and Electric Co. in San Francisco.
That means consumers will face a lot of choices about when and where they charge up their cars and how much they want to pay for the electricity.
The choice for consumers will come because utilities likely will raise rates to charge cars during peak use times, generally from around noon to 8 p.m., and lower them for charging during low-use hours, industry officials say.
Duvall said utilities still have to be wary that high gasoline prices could push sales of rechargeable electric vehicles well into the millions by 2020, because that could stress the system.
Other possible problems include electric vehicles getting larger and requiring far more electricity for recharging, and demands from people that their vehicles be recharged quickly, drawing more electricity during peak times.
Also, companies such as Coulomb Technologies in Campbell, Calif., are starting to develop recharging stations for sale to parking lot operators, office buildings and cities, which will draw more electricity.
There's also talk of the cars storing electricity and sending it back to the power companies during peak times, but officials say that's a long way off.
Industry officials say they can manage the fleet changeover as the cars and the utilities each have computers in place to manage when the cars are recharged.
"From our perspective, I think it's something that's really manageable," Ornelas said.