Energy storage
First Claim
1. A method of controlling storage of electrical energy, the method comprising:
- detecting one of a candidate charging occasion and a candidate discharging occasion with respect to pricing data and energy losses, the pricing data indicative of future prices of electrical energy over time and the energy losses caused by charging and discharging an energy storage device and the electrical energy being supplied from an external electrical supply network, by selecting a next occurrence of a locally minimum price in the pricing data as the candidate charging occasion or a next occurrence of a locally maximum price in the pricing data as the candidate discharging occasion;
validating, by circuitry of an energy management system, the one of the candidate charging occasion and the candidate discharging occasion when a price difference between the one of the candidate charging occasion and the candidate discharging occasion and another later price in the pricing data compensates for the energy losses;
charging, by the circuitry when the candidate charging occasion is validated, the energy storage device with the electrical energy at the candidate charging occasion; and
discharging, by the circuitry when the candidate discharging occasion is validated, the energy storage device at the candidate discharging occasion, whereinthe validating further includes confirming whether
PD>
PC/Eff, whereEff is an efficiency of the charging and the discharging of the energy storage device and Eff is equal to a ratio of energy retrieved during the discharging to energy input during the charging, and one ofPD is a price at the candidate discharge occasion and PC is a price paid at a most recent charging of the energy storage device, orPC is a price at the candidate charging occasion and PD is a price received at a most recent discharging of the energy storage device.
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Accused Products
Abstract
A method of controlling storage of electrical energy by charging and discharging an energy storage device in response to pricing data indicative of future prices of electrical energy over time and energy losses caused by charging and discharging the energy storage device comprises detecting alternating candidate charging and discharging occasions with respect to the pricing data by selecting a next occurrence of a locally minimum price in the pricing data as a candidate charging occasion or a next occurrence of a locally maximum price in the pricing data as a candidate discharging occasion; validating a candidate charging or discharging occasion if the price difference between that candidate charging or discharging occasion and another later price in the pricing data is at least sufficient to compensate for the energy losses caused by charging and discharging the energy storage device; and charging and discharging the energy storage device at the validated charging and discharging occasions, respectively.
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Citations
18 Claims
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1. A method of controlling storage of electrical energy, the method comprising:
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detecting one of a candidate charging occasion and a candidate discharging occasion with respect to pricing data and energy losses, the pricing data indicative of future prices of electrical energy over time and the energy losses caused by charging and discharging an energy storage device and the electrical energy being supplied from an external electrical supply network, by selecting a next occurrence of a locally minimum price in the pricing data as the candidate charging occasion or a next occurrence of a locally maximum price in the pricing data as the candidate discharging occasion; validating, by circuitry of an energy management system, the one of the candidate charging occasion and the candidate discharging occasion when a price difference between the one of the candidate charging occasion and the candidate discharging occasion and another later price in the pricing data compensates for the energy losses; charging, by the circuitry when the candidate charging occasion is validated, the energy storage device with the electrical energy at the candidate charging occasion; and discharging, by the circuitry when the candidate discharging occasion is validated, the energy storage device at the candidate discharging occasion, wherein the validating further includes confirming whether
PD>
PC/Eff, whereEff is an efficiency of the charging and the discharging of the energy storage device and Eff is equal to a ratio of energy retrieved during the discharging to energy input during the charging, and one of PD is a price at the candidate discharge occasion and PC is a price paid at a most recent charging of the energy storage device, or PC is a price at the candidate charging occasion and PD is a price received at a most recent discharging of the energy storage device. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 17)
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9. An energy storage controller for controlling storage of electrical energy, the energy storage controller comprising:
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circuitry configured to detect one of a candidate charging occasion and a candidate discharging occasion with respect to pricing data and energy losses, the pricing data indicative of future prices of electrical energy over time and the energy losses caused by charging and discharging an energy storage device and the electrical energy being supplied from an external electrical supply network, by selecting a next occurrence of a locally minimum price in the pricing data as the candidate charging occasion or a next occurrence of a locally maximum price in the pricing data as the candidate discharging occasion; validate the one of the candidate charging occasion and the candidate discharging occasion when a price difference between the one of the candidate charging occasion and the candidate discharging occasion and another later price in the pricing data compensates for the energy losses; charge, when the candidate charging occasion is validated the energy storage device with the electrical energy at the validated candidate charging occasion; and discharge, when the candidate discharging occasion is validated, the energy storage device at the candidate discharging occasion, wherein to validate the one of the candidate charging occasion and the candidate discharging occasion, the circuitry is further configured to confirm whether
PD>
PC/Eff, whereEff is an efficiency of the charging and the discharging of the energy storage device and Eff is equal to a ratio of energy retrieved during the discharging to energy input during the charging, and one of PD is a price at the candidate discharge occasion and PC is a price paid at a most recent charging of the energy storage device, or PCis a price at the candidate charging occasion and PD is a price received at a most recent discharging of the energy storage device. - View Dependent Claims (10, 11, 13, 14, 15, 16, 18)
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12. A non-transitory computer readable medium storing computer-executable instructions which, when executed by circuitry of a computer, cause the computer to perform a method comprising:
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detecting one of a candidate charging occasion and a candidate discharging occasion with respect to pricing data and energy losses, the pricing data indicative of future prices of electrical energy over time and the energy losses caused by charging and discharging an energy storage device and electrical energy being supplied from an external electrical supply network, by selecting a next occurrence of a locally minimum price in the pricing data as the candidate charging occasion or a next occurrence of a locally maximum price in the pricing data as the candidate discharging occasion; validating the one of the candidate charging occasion and the candidate discharging occasion when a price difference between the one of the candidate charging occasion and the candidate discharging occasion and another later price in the pricing data compensates for the energy losses; charging, when the candidate charging occasion is validated, the energy storage device with the electrical energy at the candidate charging occasion; and discharging, when the candidate discharging occasion is validated, the energy storage device at the candidate discharging occasion, wherein the validating further includes confirming whether
PD>
PC/Eff, whereEff is an efficiency of the charging and the discharging of the energy storage device and Eff is equal to a ratio of energy retrieved during the discharging to energy input during the charging, and one of PD is a price at the candidate discharge occasion and PC is a price paid at a most recent charging of the storage device, or PC is a price at the candidate charging occasion and PD is a price received at a most recent discharging of the energy storage device.
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Specification