System for optimizing electricity use from an electric grid and related method
First Claim
1. A system for optimizing electricity use from an electric grid, said system comprising:
- a grid operator configured to formulate a target load using a cost function for said electric grid;
said grid operator configured to broadcast a cost signal to a first chargeable electric device based on said target load;
a server in said grid operator receiving a charging profile for charging said first chargeable electric device from said first chargeable electric device, said charging profile determined by said first chargeable electric device based on said cost signal, wherein said charging profile includes at most one partial time period during which charging stops partly through said one partial time period;
an aggregator in said grid operator aggregating a demand profile for said electricity use based on said charging profile;
said grid operator configured to determine an updated cost signal based on said demand profile;
said grid operator configured to broadcast said updated cost signal to a second chargeable electric device, but not to said first chargeable electric device;
said system further comprising a means for plugging said first chargeable electric device into said electric grid;
said grid operator further configured to control charging of said first chargeable electric device based on said charging profile.
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Abstract
A method of optimizing electricity use from an electric grid is disclosed. The method includes formulating a target load using a cost function for the electric grid, broadcasting a cost signal to the electric device based on the target load, receiving a charging profile from the electric device based on the cost signal, aggregating a demand profile for the electricity use based on the charging profile, determining an updated cost signal based on the demand profile, and broadcasting the updated cost signal to another electric device. The electric device is chargeable electric device, such as a plug-in electric vehicle (PEV). The electric device determines the charging profile only once based on the cost signal, and is charged at maximum power.
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Citations
20 Claims
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1. A system for optimizing electricity use from an electric grid, said system comprising:
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a grid operator configured to formulate a target load using a cost function for said electric grid; said grid operator configured to broadcast a cost signal to a first chargeable electric device based on said target load; a server in said grid operator receiving a charging profile for charging said first chargeable electric device from said first chargeable electric device, said charging profile determined by said first chargeable electric device based on said cost signal, wherein said charging profile includes at most one partial time period during which charging stops partly through said one partial time period; an aggregator in said grid operator aggregating a demand profile for said electricity use based on said charging profile; said grid operator configured to determine an updated cost signal based on said demand profile; said grid operator configured to broadcast said updated cost signal to a second chargeable electric device, but not to said first chargeable electric device; said system further comprising a means for plugging said first chargeable electric device into said electric grid; said grid operator further configured to control charging of said first chargeable electric device based on said charging profile. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10)
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11. A method of optimizing electricity use from an electric grid, said method comprising:
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formulating a target load using a cost function for said electric grid; broadcasting a cost signal to a first chargeable electric device based on said target load; receiving a charging profile for charging said first chargeable electric device from said first chargeable electric device, said charging profile determined by said first chargeable electric device based on said cost signal, wherein said charging profile includes at most one partial time period during which charging stops partly through said one partial time period; aggregating a demand profile for said electricity use based on said charging profile; determining an updated cost signal based on said demand profile; broadcasting said updated cost signal to a second chargeable electric device but not to said first chargeable electric device; controlling charging of said first chargeable electric device based on said charging profile. - View Dependent Claims (12, 13, 14, 15, 16, 17, 18, 19, 20)
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Specification