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Vehicle to Grid technology to help Ancillary Services like demand response and boost PEV sales

776_1.jpgThe V2G (Vehicle-to-Grid) concept has been around for some time, but it's only now, due to the development of some very sophisticated technologies and some aggressive targets, that we can expect to see more electric cars on the roads enabled by the direct beneftis of V2G.

The V2G concept is actually very simple. The batteries of a PEV (Plug-in Electric vehicle) still have minimum energy stored even after fulfilling the average driving need of an user. These vehicle owners can participate in programs where grid operators will be able to control the vehicle's battery use during peak times and get some amount of electricity back to the grid, while crediting the vehicle owner for these grid services. In the end, the vehicle owners will also have control of how much energy he/she wants to put back into the grid considering his immediate driving needs. 
V2G can play an important role in the following -
  • regulation services which helps in keeping voltage and frequency stable, 
  • spinning reserves which helps in meeting sudden demand for power,
  • charging at night during low demand and providing power back to grid during high demand
Even though utilities are increasing their reliance on intermittent renewable generation capacity like solar/wind power but still additional backup options like V2G would provide greater reliability in the case sufficient wind and solar power are not available. 
Based on different government initiatives and market traction increasing numbers of PEVs are expected to be on road within the next few years and this will create the tipping point for PEV. Larger numbers of PEV's will create a cost-effective alternative to stationary energy storage and traditional short-term power plants, which are currently used for these ancillary services. However, substantial infrastructure investments, strong growth in PEV sales and innovative vehicle based technology will decide the success of V2G. 
V2G could be an additional incentive for increasing PEV sales where cost is a major factor. With this Vehicle owners can quickly recover the cost of a PEV by putting it into maximum use (regular driving need as well as selling ancillary services) which otherwise will take longer with just savings in gasoline. Note that most of the current generation PEV batteries will last long enough even with frequent charging than the normal life of a car's regular use.

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