Data processing: generic control systems or specific application – Specific application – apparatus or process – Electrical power generation or distribution system
Reexamination Certificate
2011-06-07
2011-06-07
Decady, Albert (Department: 2121)
Data processing: generic control systems or specific application
Specific application, apparatus or process
Electrical power generation or distribution system
C700S291000, C700S296000, C705S412000
Reexamination Certificate
active
07957846
ABSTRACT:
Methods and systems are provided for realizing energy cost savings through load shifting utilizing a battery bank that may serve as a battery back-up on a premises for providing power in the event of a grid power outage or curtailment. A budget of unreserved cycles of battery charging and discharging is determined, taking into account the rated battery life in terms of both time (e.g., years) and number of cycles. That cycle budget is allocated to days of the year identified as days on which the greatest savings can be realized through load shifting. These days are identified by taking into account the peak and off-peak usage rates applicable on those days, any rate tiers that may be entered as a result of the additional energy expended to load shift, and the round trip efficiency of the charge/discharge cycles. Load shifting is executed in accordance with an established schedule of the identified days, by discharging the batteries during peak usage hours and charging the batteries during off-peak periods. In the event the budget of unreserved cycles exceeds the number of profitable days for load shifting, the depth of discharge on each cycle may be increased to realize greater savings on the scheduled days, at the tolerable cost of losing cycles not expected to be used in any event.
REFERENCES:
patent: 7590472 (2009-09-01), Hakim et al.
patent: 2004/0044442 (2004-03-01), Bayoumi et al.
patent: 2004/0117330 (2004-06-01), Ehlers et al.
patent: 2007/0282495 (2007-12-01), Kempton et al.
patent: 2007/0284163 (2007-12-01), Heap et al.
Caplan Michael
Danley Douglas Ricardo
Hakim David B.
De'cady Albert
Garland Steven R
Greenberg & Traurig, LLP
GridPoint, Inc.
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