Method for controlling an exchange power between a charging infrastructure and an electrical supply network

Patent metadata

Field	Value
Publication number	US-12311797-B2
Application number	US-202117537247-A
Country	US
Kind code	B2
Filing date	Nov 29, 2021
Priority date	Nov 30, 2020
Publication date	May 27, 2025
Grant date	May 27, 2025

Abstract

Provided is a method for controlling an exchange power between a charging infrastructure and an electrical supply network. A plurality of power units for outputting or taking up electrical power are connectable to the charging infrastructure in order to exchange electrical power between the power units and the electrical supply network via the charging infrastructure. The method includes determining an energy predefinition for a control time period, predefining a power limitation, and predefining an exchange power profile depending on the energy predefinition and the power limitation. The method includes determining partial exchange powers for the power units. A sum of the partial exchange powers substantially corresponds to the exchange power, determining the partial exchange powers is effected depending on states of charge of the power units, and determining the partial exchange powers is effected taking account of partial power limits of the power units.

First claim

The invention claimed is:

1. A method for controlling electrical power exchanged between a charging infrastructure and an electrical supply network, wherein:
a plurality of electric vehicles are connectable to the charging infrastructure for exchanging the electrical power by outputting the electrical power to or drawing the electrical power from the electrical supply network via the charging infrastructure, wherein outputting the electrical power to the electrical supply network discharges at least one electric vehicle of the plurality of electric vehicles and drawing the electrical power from the electrical supply network charges the at least one electric vehicle of the plurality of electric vehicles, and
the method comprises:
determining an energy setting for a control time period, wherein the energy setting predefines at least a quantity of energy that the charging infrastructure is to draw from the electrical supply network in the control time period;
setting a power limitation that specifies at least one limit for the exchange of the electrical power to be provided by the charging infrastructure;
setting an exchange power profile depending on the energy setting and the power limitation, wherein the exchange power profile sets, for the charging infrastructure, a temporal profile of the electrical power for the control time period;
determining a plurality of partial exchange powers for the plurality of electric vehicles, respectively, wherein:
a sum of the plurality of partial exchange powers corresponds to the electrical power,
the plurality of partial exchange powers are determined depending on a plurality of states of charge, respectively, the plurality of states of charge pertaining to the plurality of electric vehicles, respectively, and
the plurality of partial exchange powers are determined based on a plurality of partial power limits, respectively, the plurality of partial power limits pertaining to the plurality of electric vehicles, respectively; and

causing the plurality of electric vehicles to exchange the plurality of partial exchange powers, respectively, to thereby exchange the electrical power between the charging infrastructure and the electrical supply network.

2. The method as claimed in claim 1 , wherein:
the plurality of partial power limits are variable and are determined depending on the plurality of states of charge, respectively, and/or
the plurality of partial exchange powers are set as a plurality of partial power profiles, respectively, depending on the exchange power profile.

3. The method as claimed in claim 2 , wherein:
a total state of charge is determined from the plurality of states of charge of the plurality of electric vehicles connected to the charging infrastructure,
for the total state of charge, a temporal profile of a state of charge range is set as a flexibility range, wherein the flexibility range is spanned by a temporal profile of an upper limit of the total state of charge and a temporal profile of a lower limit of the total state of charge for the control time period, and
at least one of:
determining the energy setting or setting the exchange power profile is performed depending on the flexibility range, and/or
the control time period ends at a target time instant and the upper limit of the total state of charge at the target time instant is greater than the lower limit of the total state of charge at the target time instant.

4. The method as claimed in claim 1 , wherein:
determining a partial exchange power of the plurality of partial exchange powers is performed depending on a deviation of a state of charge of a respective electric vehicle from a relative average state of charge, and
determining the partial exchange power is performed such that the relative state of charge is matched to the average state of charge.

5. The method as claimed in claim 1 , wherein:
a positive partial exchange power with which an electric vehicle of the plurality of electric vehicles is charged is determined depending on a difference between a state of charge of the electric vehicle and a state of charge to be reached, and
a negative partial exchange power with which the electric vehicle of the plurality of electric vehicles is discharged is determined depending on a difference between the state of charge of the electric vehicle and a discharged state of charge.

6. The method as claimed in claim 1 , comprising:
predefining a positive exchange power according to which the electrical power is drawn from the electrical supply network for charging the plurality of electric vehicles or predefining a negative exchange power according to which the electrical power is fed into the electrical supply network;
in response to predefining the positive exchange power, causing a first set of electric vehicles having respective states of charge below a relative average state of charge to be charged with priority and/or with greater power than a second set of electric vehicles having respective states of charge above the relative average state of charge; and
in response to predefining the negative exchange power, causing a third set of electric vehicles having respective states of charge above the relative average state of charge to be discharged with priority and/or with greater power than a fourth set of electric vehicles having respective states of charge below the relative average state of charge.

7. The method as claimed in claim 6 , wherein:
depending on the exchange power profile, stored energy is transferred from first electric vehicles of the plurality of electric vehicles having a state of charge above the relative average state of charge into second electric vehicles of the plurality of electric vehicles having a state of charge below the relative average state of charge.

8. The method as claimed in claim 1 , comprising:
determining a network power demand of the electrical supply network for the control time period; and
determining the exchange power profile depending on the network power demand, wherein the network power demand is a temporal profile.

9. The method as claimed in claim 1 , wherein:
the charging infrastructure is connected to the electrical supply network at at least one network connection point,
the electrical power is exchanged between the charging infrastructure and the electrical supply network via the at least one network connection point, and
the exchange power profile and/or a partial exchange power of the plurality of partial power profiles are determined depending on at least one property of the at least one network connection point.

10. The method as claimed in claim 1 , comprising:
in response to causing the plurality of electric vehicles to exchange the plurality of partial exchange powers, respectively, monitoring, by a central controller, a total state of charge and comparing the total state of charge with a predefined state of charge profile; and
in response to comparing the total state of charge with the predefined state of charge profile, transmitting information and/or control commands from the central controller to the plurality of electric vehicles to readjust the plurality of partial exchange powers exchanged by the plurality of electric vehicles.

11. The method as claimed in claim 10 , comprising:
monitoring the plurality of states of charge;
comparing the plurality of states of charge with a plurality of predefined states of charge, respectively, to detect a plurality of partial deviations of the plurality of electric vehicles, respectively; and
adjusting the plurality of partial exchange powers depending on the plurality of partial deviations, and/or determining future partial power pr

Assignees

• Wobben Properties Gmbh

Inventors

• Brombach Johannes

Classifications

• H02J2105/37

  exchanging power with electric vehicles [EV] or with hybrid electric vehicles [HEV] · CPC title

• H02J7/50

  acting upon multiple batteries simultaneously or sequentially · CPC title

• H02J7/865

  Battery or charger load switching, e.g. concurrent charging and load supply (H02J7/50 takes precedence) · CPC title

• B60L53/63 Primary

  in response to network capacity · CPC title

• B60L53/66

  Data transfer between charging stations and vehicles · CPC title