Federal Sustainability Podcast: Grid Friendly Charger Controller for Electric Vehicles

Interview with Peter Christensen,
Commercialization Manager at Pacific Northwest National Laboratory

Green Government PodcastWelcome back to another edition of CEIL’s Federal Sustainability and Green Government Podcast. In our latest episode, we chat with Peter Christensen, Commercialization Manager at the Pacific Northwest National Laboratory. Peter is an electrical power systems engineer by training and worked for many years as a systems protection and control engineer for a regional utility. In his position with PNNL he looks at how to partner with industry to develop new technology in the energy sector. We talk with Peter about PNNL’s recently patented Grid Friendly Charger Controller for electric vehicles.

More About Today’s Guest

peter_christensenPeter Christensen is an electrical power systems engineer by training and worked for many years as a system protection and control engineer for a regional utility. In addition to designing protection and control schemes for generation, transmission, and distribution systems, he also performed a large number of interconnection studies for distributed independent power producers. After earning a law degree, Peter then worked for an energy consulting company where he helped large industrial users prepare for and take advantage of the increasingly complex and changing electrical power markets during the mid to late 1990’s. During that time, Peter became well known as a national expert on competitive power markets.

Recognizing the value of distributed generation in a restructured market, Peter then went to work for a leading PEM fuel cell developer as its VP of engineering and intellectual property. Eventually, this experience led him to his new position with PNNL where he looks at how to partner with industry to develop new technology in the energy sector.

Electric vehicle owners can plug in their cars and forget about them, knowing they’ll get the cheapest electricity available and won’t crash the grid – using a new technology called the Smart Charger Controller. Developed at the Department of Energy’s Pacific Northwest National Laboratory, the controller automatically recharges electric vehicles during times of least cost to the consumer and lower demand for power. Widespread use of these devices could help advance a smart power grid.

Electric vehicles will ultimately reduce the nation’s dependency on oil. While the new vehicles will serve as an additional source of power demand, they also could contribute to an even “smarter” grid if equipped with controller technology.

If a million owners plug in their vehicles to recharge after work, it could cause a major strain on the grid,” said PNNL engineer Michael Kintner-Meyer. “The Smart Charger Controller could prevent those peaks in demand from plug-in vehicles and enable our existing grid to be used more evenly.”

That efficiency translates to a more stable grid and cheaper power.

“Using the device could save up to $150 a year for electric vehicle owners who pay based on when they charge their vehicle,” Kintner-Meyer said.

How it Works

Electric vehicles will become widely available starting in 2011. The current Administration supports a goal of one million electric vehicles on the road by 2015. A previous PNNL study showed that America’s existing power grid could meet the needs of about 70 percent of all U.S. light-duty vehicles if battery charging was managed to avoid new peaks in electricity demand.

The Smart Charger Controller does just that. Owners program the controller to charge at a specific time of day or night or at a set price point. The controller uses a low-range wireless technology to communicate with the power grid and determine the best and cheapest time to recharge vehicles. By charging vehicles during off-peak times, the controller saves consumers money.

Previous PNNL studies with household appliances show that “smart” technologies also save the grid from brown-outs with little impact to the consumer. Grid Friendly™ technology inside the Smart Charger Controller senses stress conditions on the grid. When the grid says more power is needed, the controller can temporarily stop charging the vehicle until the stress subsides.

This instant reduction in charging load, multiplied on a large scale with many vehicles, could serve as a shock absorber for the grid. The technology would relieve load instantly and give grid operators time to bring new power generation sources on line to stabilize the grid – a process that usually takes several minutes.

To learn more about the Grid Friendly Charger Controller and other available technologies from PNNL, visit: http://availabletechnologies.pnnl.gov/default.aspx

At the EDTA 2011 Conference & Annual Meeting? Check out this technology at booth #635!

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