Network as automation platform for collaborative E-car charging at the residential premises
First Claim
1. A method for charging a plurality of electric vehicle batteries connected to a step-down transformer powering a plurality of residences, the method comprising:
- identifying a plurality of residential power demands, wherein;
at least one of the residential power demands is a charging of an electric vehicle battery, anda summation of the residential power demands is greater than an upper power limit of the transformer;
identifying a time-critical subset of the residential power demands and a time-flexible subset of the residential power demands, wherein the time-flexible subset includes the charging of the electric vehicle batteries;
allocating, at a beginning of a time slot, power from the transformer among all time-critical residential power demands and a portion of the time-flexible residential power demands so as not to exceed the upper power limit of the transformer for a duration of the time slot;
charging the electric vehicle batteries according to the allocating for the duration of the time slot; and
repeating the above for subsequent time slots until the upper power limit of the transformer is sufficient for simultaneous operation of all residential power demands;
wherein schedules allocating the power from the transformer are independently computed by each of a plurality of local demand management clients for each of the plurality of residences, and further wherein a voting process among the local demand management clients is used to decide which of the schedules is used in the allocating, at a beginning of a time slot, of power from the transformer.
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Accused Products
Abstract
A system and method are provided for the collaborative charging of electric vehicles. The collaborative charging manages the disbursement of power from a neighborhood transformer so as to increase the efficiency of electric vehicle charging at the residences without significantly altering the existing power distribution and residential infrastructures. Time-flexible loads are shed in order to efficiently allocate energy distribution without compromising the comfort or security of the user. The identities of individual residential power demands can be concealed to protect the user'"'"'s privacy or made available to further optimize power allocation. The power allocation negotiation may be performed in a residential local demand management client separate from the residential charging station.
32 Citations
12 Claims
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1. A method for charging a plurality of electric vehicle batteries connected to a step-down transformer powering a plurality of residences, the method comprising:
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identifying a plurality of residential power demands, wherein; at least one of the residential power demands is a charging of an electric vehicle battery, and a summation of the residential power demands is greater than an upper power limit of the transformer; identifying a time-critical subset of the residential power demands and a time-flexible subset of the residential power demands, wherein the time-flexible subset includes the charging of the electric vehicle batteries; allocating, at a beginning of a time slot, power from the transformer among all time-critical residential power demands and a portion of the time-flexible residential power demands so as not to exceed the upper power limit of the transformer for a duration of the time slot; charging the electric vehicle batteries according to the allocating for the duration of the time slot; and repeating the above for subsequent time slots until the upper power limit of the transformer is sufficient for simultaneous operation of all residential power demands; wherein schedules allocating the power from the transformer are independently computed by each of a plurality of local demand management clients for each of the plurality of residences, and further wherein a voting process among the local demand management clients is used to decide which of the schedules is used in the allocating, at a beginning of a time slot, of power from the transformer. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12)
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Specification