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Optimal battery chemistry, capacity selection, charge/discharge schedule, and lifetime of energy storage under time-of-use pricing

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4 Author(s)
Barnes, A.K. ; Dept. of Electr. Eng., Univ. of Arkansas, Fayetteville, AR, USA ; Balda, J.C. ; Geurin, S.O. ; Escobar-Mejia, A.

Energy storage units (ESU) can reduce the cost of purchased electricity under time-of-use (TOU) pricing. To maximize the cost reduction, the chemistries, capacities, and charge/discharge schedules of the batteries used in the ESU must be selected appropriately. The batteries must have sufficient capacities to supply the energy demanded by the charge/discharge profiles and to meet the project lifetime. The ESU responds to a TOU price structure. The ESU output power is limited by the rating of the power electronic interface. The cost of the ESU is assumed to increase linearly with battery capacity. A method using linear optimization is developed that determines the battery chemistries, capacities, and charge/discharge schedules simultaneously. The method shows that the Li-Ion battery chemistry is the most cost effective technology due to its high efficiency and that an 11-year project lifetime is most profitable.

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Innovative Smart Grid Technologies (ISGT Europe), 2011 2nd IEEE PES International Conference and Exhibition on

Date of Conference:

5-7 Dec. 2011

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