Battelle Memorial Institute

Steven E Widergren

Donald J Hammerstrom

Robert G Pratt

Bishnu P Bhattarai

Bilal Ahmad Bhatti

Methods and apparatus provide flexible allocation and regulation of scheduled energy transfers between energy storage devices ('batteries') and a power grid. Piecewise mappings having at least one sloping segment enable gradual variations in scheduled energy transfers as cleared values of a medium of energy exchange deviate from predicted values of the medium of energy exchange. Thereby deviations from a battery's predicted energy transfer schedule can be reduced, and overall smoother operation of a power grid can be achieved. Two sloping linear segments can be separated by a dead band, a portion of the mapping in which the scheduled energy transfer amount is invariant. A dead zone can increase the likelihood of a battery meeting its predicted schedule.

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Kennewick, WA, United States of America

Steven E Widergren