Electric Vehicles are HereWill this become a major trend?
Phil Carson | Feb 23, 2011
Travis Johnson grew up in an engineering family and remembers living at the base of Grand Coulee Dam. Later, he lived near Hoover Dam, where his father worked as an electrical engineer. "I thought engineering was pretty cool," Johnson said. Johnson earned his own electrical engineering degree and has spent two decades in various roles at NV Energy, which is headquartered in Reno, Nevada. NV Energy serves about 1.2 million electricity customers. That's a 55,000-square-mile service territory serving 97 percent of Nevadans and a bit of California. Two years ago, reading the tea leaves on electric vehicles (EVs), Johnson pressed for and received his current role as manager of electric transportation and emerging technologies. Now, EVs are here and NV Energy is ready. It will offer its residential customers with smart meters a chance to opt in on time-of-use (TOU) rates, with a one-time chance to opt out after 12 months and return to the traditional flat rate. NV refers to this TOU plan as "an experimental program." TOU rates will become available to residents as NV Energy rolls out smart meters throughout its territory over the next couple of years. The smart meters also enable NV Energy to serve EV owners. Rather than track the location of EV owners, as Southern California Edison is doing, the utility will map its smart meters to the transformer that serves them and monitor load at that level. "That'll give us a chance to see how heavily loaded these transformers really are," Johnson said. "The beauty of it is that these cars are going to move around town. People move. People sell cars. What you care about is avoiding having your facilities overloaded. So, as long as you have a way to keep an eye on that, you should be in good shape." Any attempt to forecast EV uptake in NV Energy's
service territory? Nevada drivers, like their counterparts across the country, are eligible for a $7,500 tax credit for an EV purchase. IT Changes So, what internal, IT-related changes must take
place to prepare NV Energy for EV adoption? "One of those issues is load management," Johnson said. "With all this load out there, utilities would be remiss if they didn't consider having the ability to communicate with the vehicles or at least with the charging infrastructure. They might need the ability to shake that load loose for short periods of time. "Another big challenge is multi-family residences and what we're calling `orphan' locations, which aren't necessarily associated with a home," Johnson continued. "They're not going to be easy. You can imagine the load and the metering racks are not in the best position to accommodate charging stations." Another issue is determining the "right size" of
public charging infrastructure. While most charging will be done at home, Johnson
echoed conventional wisdom that somewhat ubiquitous
charging stations may have the psychological effect
of reassuring drivers with "range anxiety" that they
won't become stranded if they miscalculate the
length of their drive. What about the costs and benefits of preparing to
serve EV owners? "One benefit of EVs is to improve your load factor, if they charge at night," Johnson said. "They're an ideal use of system capacity." Phil Carson is editor of Intelligent Utility daily. Copyright © 1996-2010 by CyberTech, Inc. All rights reserved. To subscribe or visit go to: http://www.energycentral.com To subscribe or visit go to: http://www.energybiz.com |