Energy Internet and eVehicles Overview
Governments around the world are wrestling with the challenge of how to prepare society for inevitable climate change. To date most people have been focused on how to reduce Green House Gas emissions, but now there is growing recognition that regardless of what we do to mitigate against climate change the planet is going to be significantly warmer in the coming years with all the attendant problems of more frequent droughts, flooding, sever storms, etc. As such we need to invest in solutions that provide a more robust and resilient infrastructure to withstand this environmental onslaught especially for our electrical and telecommunications systems.
Linking renewable energy with high speed Internet using fiber to the home combined with eVehicles and dynamic charging where vehicle's batteries are charged as it travels along the road, may provide for a whole new "energy Internet" infrastructure for linking small distributed renewable energy sources to users that is far more robust and resilient to survive climate change than today's centralized command and control infrastructure. For more details please see:
Free High Speed Internet to the Home or School Integrated with solar roof top: http://goo.gl/wGjVG
High level architecture of Internet Networks to survive Climate Change: http://goo.gl/juWdH
Architecture and routing protocols for Energy Internet http://goo.gl/niWy1g
Thursday, April 29, 2010
Speed Bumps Ahead for Electric-Vehicle Charging
The myth that thousands of EVs will seamlessly fold into the power grid by charging at night, using otherwise idle generating plants and power grids, is breaking down. Utilities worry that EV charging could black out the neighborhoods of some early EV adopters and give the emerging technology a black eye. Policy experts worry that the change in the grid's use could unintentionally muck up their green energy plans.
The urgency was palpable in comments by Saul Zambrano, director for clean air and transportation at San Francisco–based Pacific Gas & Electric Co. (PG&E), at a California Energy Commission conclave in October: "You've got to manage the runway. And from our perspective, we think the runway is getting short relative to the launch of these vehicles."
few thousand EVs won't crash the California grid, but they could cause local trouble, explains Doug Kim, director of EV readiness efforts at Rosemead, Calif.–based Southern California Edison (SCE), PG&E's neighbor to the south. Kim expects EV buyers to be concentrated in certain communities. Star-studded Santa Monica is already on his watch list. "We need to make sure that our local neighborhood circuits, including the transformers, are robust enough to support those additional loads," says Kim.
EVs need lots of power, especially when charged quickly. Utilities bet that most buyers will want a 240-volt charger that can "fill the tank" of a modest-size EV in 2 to 3 hours, four times as fast as a standard 120-V charger can. Such "AC Level 2" chargers, as defined by the Society of Automotive Engineers' emerging J1772 standard, draw up to 6.6 kilowatts. Turning one on is like adding up to three homes to a neighborhood, and that's with the air conditioning, lights, and laundry running.
Turning on two or three Level 2 chargers could burn out the street-level transformers that are the distribution grid's weakest link. Most utilities employ undersized transformers, which are designed to cool overnight. Without time to cool, sustained excess current will eventually cook a transformer's copper windings, causing a short and blacking out the local loads it serves.
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