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Optimized Day-Ahead Pricing for Smart Grids with Device-Specific Scheduling Flexibility

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4 Author(s)
Joe-Wong, C. ; Program in Appl. & Comput. Math., Princeton Univ., Princeton, NJ, USA ; Sen, S. ; Sangtae Ha ; Mung Chiang

Smart grids are capable of two-way communication between individual user devices and the electricity provider, enabling providers to create a control-feedback loop using time-dependent pricing. By charging users more in peak and less in off-peak hours, the provider can induce users to shift their consumption to off-peak periods, thus relieving stress on the power grid and the cost incurred from large peak loads. We formulate the electricity provider's cost minimization problem in setting these prices by considering consumers' device-specific scheduling flexibility and the provider's cost structure of purchasing electricity from an electricity generator. Consumers' willingness to shift their device usage is modeled probabilistically, with parameters that can be estimated from real data. We develop an algorithm for computing day-ahead prices, and another algorithm for estimating and refining user reaction to the prices. Together, these two algorithms allow the provider to dynamically adjust the offered prices based on user behavior. Numerical simulations with data from an Ontario electricity provider show that our pricing algorithm can significantly reduce the cost incurred by the provider.

Published in:

Selected Areas in Communications, IEEE Journal on  (Volume:30 ,  Issue: 6 )

Date of Publication:

July 2012

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