DISTRIBUTED CONTROL OF ELECTRIC POWER GRIDS

• US 20150377936A1
• Filed: 06/29/2014
• Published: 12/31/2015
• Est. Priority Date: 06/29/2014
• Status: Active Grant

• Current Assignee: International Business Machines Corporation
• Original Assignee: International Business Machines Corporation
• Inventors: Ghosh, Soumyadip, Phan, Dung, Sun, Xu
• Granted Patent: US 11,181,564 B2
• Time in Patent Office: Days
• US Class Current: 1/1
• CPC Class Codes: G01R 19/2513 Arrangements for monitoring electric power systems, e.g. power lines or loads; Logging
• CPC Class Codes: G01R 21/133 by using digital technique

Abstract

A method for determining power output levels of a plurality of nodes in an electric power system includes receiving, at a first node of the plurality of nodes, voltage information and multipliers of all neighboring nodes of the first node within the electric power system, determining, by the first node, a local power generation and a local voltage using the voltage information and the multipliers of the neighboring nodes and distributing the local power generation and the local voltage to the neighboring nodes, determining, by the first node, an estimated voltage of each of the neighboring nodes and distributing the estimated voltage to each of the neighboring nodes, and updating, by the first node, a local multiplier using the voltage information received from the neighboring nodes and the estimated voltage of each of the neighboring nodes determined by the node.

Claims

1. A method for determining power output levels of a plurality of nodes in an electric power system comprising:

receiving, at a first node of the plurality of nodes, voltage information and multipliers of all neighboring nodes of the first node within the electric power system;

determining, by the first node, a local power generation and a local voltage using the voltage information and the multipliers of the neighboring nodes and distributing the local power generation and the local voltage to the neighboring nodes;

determining, by the first node, an estimated voltage of each of the neighboring nodes and distributing the estimated voltage to each of the neighboring nodes; and

updating, by the first node, a local multiplier using the voltage information received from the neighboring nodes and the estimated voltage of each of the neighboring nodes determined by the node.

2. The method of claim 1, performed by each node of the plurality of nodes.

3. The method of claim 1, iteratively performed by the first node, the method further comprising evaluating a stopping criteria after updating the local multiplier.

4. The method of claim 1, wherein the first node is a power generator in the electric power system.

5. The method of claim 1, wherein each of the plurality of nodes are power generators in the electric power system.

6. The method of claim 1, implemented as a fully distributed system wherein each of the plurality of nodes communicates directly with all of its neighboring nodes.

7. A computer program product for determining a power output level of a node in an electric power system, the computer program product comprising a computer readable storage medium having program instructions embodied therewith, the program instructions executable by a processor to cause the processor to perform a method comprising:

receiving, at a first node of the plurality of nodes, voltage information and multipliers of all neighboring nodes of the first node within the electric power system;

determining, by the first node, a local power generation and a local voltage using the voltage information and the multipliers of the neighboring nodes and distributing the local power generation and the local voltage to the neighboring nodes;

determining, by the first node, an estimated voltage of each of the neighboring nodes and distributing the estimated voltage to each of the neighboring nodes; and

updating, by the first node, a local multiplier using the voltage information received from the neighboring nodes and the estimated voltage of each of the neighboring nodes determined by the node.

8. The computer program product of claim 7, performed by each node of the plurality of nodes.

9. The computer program product of claim 7, iteratively performed by the first node, the method further comprising evaluating a stopping criteria after updating the local multiplier.

10. The computer program product of claim 7, wherein the first node is a power generator in the electric power system.

11. The computer program product of claim 7, wherein each of the plurality of nodes are power generators in the electric power system.

12. The computer program product of claim 7, implemented as a fully distributed system wherein each of the plurality of nodes communicates directly with all of its neighboring nodes.

13. A generator in an electric power system configured to determine a power output level comprising:

a computer program product comprising a computer readable storage medium having program instructions embodied therewith, the program instructions executable by a processor to cause the generator to;

receive, from at least one neighboring generator within the electric power system, voltage information and multipliers;

determine a local power generation and a local voltage using the voltage information and the multipliers of the at least one neighboring node and distributing the local power generation and the local voltage to the at least one neighboring node;

determine an estimated voltage of the at least one neighboring node and distributing the estimated voltage to the at least one neighboring node; and

update a local multiplier using the voltage information received from the at least one neighboring node and the estimated voltage of the at least one neighboring node determined by the generator.

14. The generator of claim 13, iteratively executing the program of instructions and further comprising evaluating a stopping criteria after updating the local multiplier.

15. The generator of claim 14, further comprising a communication module configured for two-way communication with the at least one neighboring node.