Method for computer-aided control of the electrical power consumption of a plurality of power consumers in an electrical power grid

• US 9,361,655 B2
• Filed: 07/08/2011
• Issued: 06/07/2016
• Est. Priority Date: 08/09/2010
• Status: Active Grant

• Current Assignee: Siemens AG
• Original Assignee: Siemens AG
• Inventors: Voelksen, Gerd, Eger, Kolja, Gerdes, Christoph
• Primary Examiner(s): Shechtman, Sean
• Assistant Examiner(s): Garland, Steven
• Application Number:
  US13/816,291
• Publication Number:
  US 20130274939A1
• Time in Patent Office: 1,796 Days
• Field of Search: None
• US Class Current: 1/1
• CPC Class Codes: G06Q 30/04 Billing or invoicing
• CPC Class Codes: G06Q 50/06 Energy or water supply
• CPC Class Codes: H02J 13/00004 characterised by the power network being locally controlled
• CPC Class Codes: H02J 13/00012 using an auxiliary transmission line
• CPC Class Codes: H02J 13/00016 using a wired telecommunication network or a data transmission bus
• CPC Class Codes: H02J 2310/12 The local stationary network supplying a household or a building
• CPC Class Codes: H02J 2310/60 Limiting power consumption in the network or in one section of the network, e.g. load shedding or peak shaving
• CPC Class Codes: H02J 3/14 by switching loads on to, or off from, network, e.g. progressively balanced loading
• CPC Class Codes: Y02B 70/3225 Demand response systems, e.g. load shedding, peak shaving
• CPC Class Codes: Y04S 20/222 Demand response systems, e.g. load shedding, peak shaving
• CPC Class Codes: Y04S 50/12 Billing, invoicing, buying or selling transactions or other related activities, e.g. cost or usage evaluation

Abstract

In a method for controlling the electrical power consumption of a plurality of power consumers in a power grid, the power consumers represent network nodes of a communication network made of a plurality of network nodes, in which the power consumers communicate with each other. Each of the network nodes estimates the total power consumption of the network nodes based on the exchange of information with one other network node. Each network node having an additional power demand which increases a required amount of power, compares the total power consumption estimated by the network node plus the required amount of power to a predefined total power demand of the network nodes and initiates a delivery of the required amount of power from a power provider when the estimated total power demand thereof plus the required amount of power is less than the predefined total power demand by a threshold value.

Claims

1. A method for computer-aided control of electrical power consumption of a plurality of power consumers in an electrical power grid, the power consumers representing network nodes of a distributed communication network made up of a plurality of network nodes, in which the power consumers communicating with each other, which method comprises the steps of:

a) estimating, via each of the network nodes, a total power consumption of the plurality of network nodes on a basis of an exchange of information with at least one other of the network nodes; and

b) each of the plurality of network nodes having an additional power demand which increases a required amount of power by a network node, comparing the total power consumption estimated by the network node plus the required amount of power to a predefined total power demand of the plurality of network modes and initiates a procurement of the required amount of power from a power provider when the network node estimate of the total power consumption plus the required amount of power is less than the predefined total power demand by at least a predetermined threshold value.

2. The method according to claim 1, wherein in an event that in step b) the total power consumption estimated by each of the network nodes plus the required amount of power is not less than the predefined total power demand by at least the predetermined threshold value, each of the network nodes repeats step b) after a predetermined interval of time.

3. The method according to claim 2, which further comprises extending a length of the predetermined interval of time after each repetition of step b).

4. The method according to claim 2, wherein after a predetermined number of repetitions of step b) each of the network nodes no longer takes part in the method.

5. The method according to claim 2, which further comprises doubling a length of the predetermined interval of time after each repetition of step b).

6. The method according to claim 1, wherein the predefined total power demand is provided by a load profile which specifies a chronological sequence of a total power to be provided in the electrical power grid.

7. The method according to claim 1, wherein at predetermined intervals of time each of the network nodes selects at least one network node from the plurality of network nodes known to the network node, to estimate the total power consumption of the plurality of network nodes on the basis of the exchange of information with at least one selected network node.

8. The method according to claim 1, which further comprises performing the exchange of information taking place in step a) between a predefined number of the network nodes.

9. The method according to claim 8, wherein each of the network nodes of the predefined number of the network nodes transmits an average power consumption estimated by the network node of an individual network node in the communication network or a variable from which the average power consumption can be deduced, to the other network nodes of the predefined number of the network nodes, wherein each of the network nodes of the predefined number of the network nodes updates its estimated average power consumption taking into account all the average power consumptions of the network nodes of the predefined number of the network nodes and ascertains an updated estimated total power consumption of the plurality of network nodes therefrom.

10. The method according to claim 9, wherein the updated average power consumption for each of the network nodes of the predefined number of the network nodes is an arithmetic mean of the average power consumptions of all the network nodes of the predefined number of the network nodes.

11. The method according to claim 9, wherein each of the network nodes of the predefined number of the network nodes transmits a total number estimated by it of the network nodes in the communication network or a variable from which the total number can be deduced, to the other network nodes of the predefined number of the network nodes, wherein each of the network nodes of the predefined number of the network nodes updates its total number taking into account all total numbers of the network nodes of the predefined number of the network nodes and then on a basis of a multiplication of the average power consumption estimated and updated by it by an updated total number updates the estimated total power consumption of the plurality of network nodes.

12. The method according to claim 11, wherein each of the network nodes of the predefined number of the network nodes transmits its estimated total number of the network nodes or a reciprocal value of the estimated total number of the network nodes to the other network nodes of the predefined number of the network nodes, wherein the updated total number of the network nodes for each network node of the predefined number of the network nodes is produced from the reciprocal value of the total of the reciprocal values of the estimated total numbers of all the network nodes of the predefined number of the network nodes divided by the predefined number of the network nodes.

13. The method according to claim 9, wherein when a respective one of the network nodes reduces its power consumption with the power provider by an amount of power, the respective network node reduces its estimated average power consumption by the amount of power.

14. The method according to claim 9, wherein a respective network node initiates a procurement of the required amount of power from the power provider, the respective network node increases its estimated average power consumption by the required amount of power.

15. The method according to claim 1, wherein the predetermined threshold value is zero or corresponds to a percentage value of the predefined total power demand.

16. The method according to claim 1, wherein the method is used in the electrical power grid, in which the power consumers each contain at least one of a power consumption unit or a group of power consumption units.

17. The method according to claim 16, wherein at least some of the power consumption units are in each case air conditioning installations and/or consumption units for a procurement of electrical power for electric vehicles.

18. The method according to claim 1, which further comprises performing the method in the electrical power grid in which the power provider contains at least one of power generators or power distributors.

19. The method according to claim 1, which further comprises performing the exchange of information taking place in step a) between a pair of the network nodes.

20. An electrical power grid, comprising:

a plurality of power consumers representing network nodes of a distributed communication network made up of a plurality of said network nodes, said power consumers communicating with each other and said network nodes in the electrical power grid are configured such that;

a) said network nodes each on a basis of an exchange of information with at least one other of said network nodes estimates a total power consumption of said plurality of network nodes;

b) each of said network nodes having an additional power demand which increases a required amount of power of a network node, comparing the total power consumption estimated by said network node plus the required amount of power to a predefined total power demand of said plurality of network nodes and initiates a procurement of the required amount of power from a power provider when the total power consumption estimated of said network node plus the required amount of power is less than the predefined total power demand by at least a predetermined threshold value.

21. The electrical power grid according to claim 20, wherein in an event that in step b) the total power consumption estimated by each of said network nodes plus the required amount of power is not less than the predefined total power demand by at least the predetermined threshold value, each of said network nodes repeats step b) after a predetermined interval of time.

22. A power consumer for use in an electrical power grid, the power consumer representing a network node of a distributed communication network made up of a plurality of network nodes representing power consumers, in which the power consumers communicating with each other, wherein during operation in the electrical power grid the power consumer is configured such that:

a) said power consumer estimates a total power consumption of said plurality of network nodes on a basis of an exchange of information with at least one other network node;

b) when a power demand of said power consumer increases by a required amount of power, said power consumer compares the total power consumption estimated by the power consumer plus the required amount of power to a predefined total power demand of the plurality of network nodes and initiates a procurement of the required amount of power from a power provider when the total power consumption estimated by the power consumer plus the required amount of power is less than the predefined total power demand by at least a predetermined threshold value.