GRID REGULATION SERVICES FOR ENERGY STORAGE DEVICES BASED ON GRID FREQUENCY
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Accused Products
Abstract
Disclosed herein are representative embodiments of methods, apparatus, and systems for charging and discharging an energy storage device connected to an electrical power distribution system. In one exemplary embodiment, a controller monitors electrical characteristics of an electrical power distribution system and provides an output to a bi-directional charger causing the charger to charge or discharge an energy storage device (e.g., a battery in a plug-in hybrid electric vehicle (PHEV)). The controller can help stabilize the electrical power distribution system by increasing the charging rate when there is excess power in the electrical power distribution system (e.g., when the frequency of an AC power grid exceeds an average value), or by discharging power from the energy storage device to stabilize the grid when there is a shortage of power in the electrical power distribution system (e.g., when the frequency of an AC power grid is below an average value).
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Citations
57 Claims
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1-34. -34. (canceled)
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35. A method comprising:
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transmitting electrical power from an electrical power distribution system to energy storage devices; and receiving electrical power at the electrical power distribution system from one or more of the energy storage devices in response to a measured instantaneous frequency of the electrical power distribution system, wherein the one or more energy storage devices transmit power to the electrical power distribution system in response to a deviation of the measured instantaneous frequency of the electrical power distribution system from an average frequency of the electrical power distribution system. - View Dependent Claims (36, 37, 51, 52, 53)
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38. A method, comprising:
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monitoring a frequency of an electrical power distribution system; and when the frequency of the electrical power distribution system is in a first frequency range, receiving power from the electrical power distribution system and charging an energy storage device at a charging rate with the received power; and when the frequency of the electrical power distribution system is in a second frequency range different from the first frequency range, discharging the energy storage device at a discharging rate and delivering power from the energy storage device to the electrical power distribution system. - View Dependent Claims (39, 40, 41, 42)
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43. A method, comprising:
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discharging an energy storage device in response to a frequency of an electrical power distribution system when the frequency is within a first frequency range; and delivering power from the discharging energy storage device to the electrical power distribution system. - View Dependent Claims (44, 45, 46, 47, 54, 55, 56, 57)
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48-50. -50. (canceled)
Specification