FREQUENCY RESPONSIVE CHARGING SYSTEM AND METHOD
First Claim
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1. A method for frequency responsive charging an electric vehicle comprising:
- a) sensing a grid frequency of a utility power using an electric vehicle supply equipment; and
b) controlling a charging load in an electric vehicle in response to a function of the sensed grid frequency.
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Abstract
In some embodiments, the present invention includes the use of one or more electric power supply system, or systems, and the electric vehicle, or vehicles, connected thereto, to provide load-based utility grid frequency regulation by varying the amount of power drawn by the vehicle or vehicles.
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Citations
29 Claims
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1. A method for frequency responsive charging an electric vehicle comprising:
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a) sensing a grid frequency of a utility power using an electric vehicle supply equipment; and b) controlling a charging load in an electric vehicle in response to a function of the sensed grid frequency. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11)
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12. A method for regulating area control error in utility power, the method comprising:
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a) sensing a grid frequency of a utility power using an electric vehicle supply equipment; and b) controlling a charging load in an electric vehicle in response to a combination of a function of the sensed grid frequency and a function of an externally supplied value. - View Dependent Claims (13, 14, 15, 16)
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17. A method for charging an electric vehicle comprising:
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a) sensing a frequency of a utility power using an electric vehicle supply equipment external to the electric vehicle; and b) controlling a battery charger in the electric vehicle using the electric vehicle supply equipment so as to reduce a frequency error in the utility power. - View Dependent Claims (18, 24, 25, 26)
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- 19. A method for supplying a synthetic inertia to the power grid comprising controlling a battery charger connected to a utility power grid using a derivative of a frequency error to adjust the charging load applied by the battery charger so as to reduce a rate of change of the frequency error in the utility power grid.
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23. A method for frequency responsive charging comprising:
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a) sensing a frequency of a utility power using an electric vehicle supply equipment; b) determining a regulated charging range by sensing a maximum charge rate parameter and a minimum charge rate parameter for a connected electric vehicle; and c) adjusting a charge rate parameter within the regulated charging range to control a charging load in the electric vehicle in response to a function of the sensed grid frequency.
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27. A system for compensating for frequency error in a utility power grid, the system comprising:
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a) a utility power supply comprising frequency variations; b) an electric vehicle comprising an onboard charger; and c) an electric vehicle supply equipment comprising; (i) a utility power input; (ii) an electric vehicle supply output; (iii) a frequency detector having an output; (iv) a processor adapted to determine a frequency error based on the output from the frequency detector and to determine a charging rate parameter based on the frequency error; and (v) a circuit adapted to command the charging rate parameter to an electric vehicle so as to control the charging rate of the electric vehicle in response to the frequency error. - View Dependent Claims (28)
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29. A system for compensating for frequency error in a utility power grid, the system comprising:
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a) a utility power supply comprising frequency variations; b) a plurality of electric vehicle supply equipment connected to the utility power supply; c) a plurality of electric vehicle chargers for charging electric vehicles comprising an onboard charger; and d) an electric vehicle supply equipment adapted to set the charging load in the electric vehicles so as to control the charging rate of the electric vehicle in response to the function of the frequency.
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Specification