Real time feedback-based optimization of distributed energy resources

Patent metadata

Field	Value
Publication number	US-10944267-B2
Application number	US-201916681054-A
Country	US
Kind code	B2
Filing date	Nov 12, 2019
Priority date	Nov 16, 2016
Publication date	Mar 9, 2021
Grant date	Mar 9, 2021

Abstract

An example device includes a processor configured to receive a plurality of voltage values representing respective voltage magnitudes at voltage nodes in a first portion of a power system and determine, for each voltage node, a respective value of first and second voltage-constraint coefficients. The processor is also configured to receive a power value corresponding to a connection point of the first portion of the power system with a second portion of the power system and determine for the connection point, a respective value of first and second power-constraint coefficients. The processor is also configured to cause at least one energy resource connected to the first portion of the power system to modify an output power of the at least one energy resource based on the value of the first and second voltage-constraint coefficients for each voltage node and the value of the first and second power-constraint coefficients.

First claim

What is claimed is:

1. A device comprising:
at least one processor configured to:
receive a plurality of voltage values, wherein voltage values in the plurality of voltage values represent respective voltage magnitudes at respective voltage nodes in a plurality of voltage nodes in a first portion of a power system;
determine, for each respective voltage node:
a respective value of a first voltage-constraint coefficient, based on a respective previous value of the first voltage-constraint coefficient, a minimum voltage value, and a respective voltage value in the plurality of voltage values that corresponds to the respective voltage node; and
a respective value of a second voltage-constraint coefficient based on a respective previous value of the second voltage-constraint coefficient, a maximum voltage value, and the respective voltage value, wherein the minimum voltage value for the respective node and the maximum voltage value for the respective node represent a defined allowable voltage range at the respective node;

receive a power value corresponding to a connection point of the first portion of the power system with a second portion of the power system;
determine for the connection point:
a value of a first power-constraint coefficient, based on a previous value of the first power-constraint coefficient, a power setpoint for the connection point, and the power value; and
a value of a second power-constraint coefficient based on a previous value of the second voltage-constraint coefficient, the power setpoint for the connection point, and the power value; and

cause at least one energy resource in a plurality of energy resources that are connected to the first portion of the power system to modify an output power of the at least one energy resource based on the respective value of the first voltage-constraint coefficient for each respective voltage node, the respective value of the second voltage-constraint coefficient for each respective voltage node, the value of the first power-constraint coefficient for the connection point, and the value of the second power-constraint coefficient for the connection point.

2. The device of claim 1 , wherein:
the at least one processor is further configured to:
receive a plurality of current values, wherein current values in the plurality of current values correspond to respective current nodes in a plurality of current nodes in the first portion of the power system; and
determine, for each respective current node, a respective value of a current-constraint coefficient, based on a respective previous value of the current-constraint coefficient, a respective maximum current value for the respective current node, and a respective current value in the plurality of current values that corresponds to the respective current node, and

causing the at least one energy resource to modify the output power of the at least one energy resource comprises causing the at least one energy resource to modify the output power of the at least one energy resource based further on the respective value of the current-constraint coefficient for each respective current node.

3. The device of claim 1 , wherein causing the at least one energy resource to modify the output power comprises outputting, to the at least one energy resource, the respective value of the first voltage-constraint coefficient for each respective voltage node, the respective value of the second voltage-constraint coefficient for each respective voltage node, the value of the first power-constraint coefficient for the connection point, and the value of the second power-constraint coefficient for the connection point.

4. The device of claim 1 , wherein:
each voltage value in the plurality of voltage values comprises a set of voltage values, each corresponding to a respective phase at the respective voltage node, and
the power value comprises a set of power values, each corresponding to a respective phase at the connection point.

5. The device of claim 4 , wherein:
determining the respective value of the first voltage-constraint coefficient comprises determining a set of respective values of the first voltage-constraint coefficient, each respective value in the set of respective values of the first voltage-constraint coefficient corresponding to the respective phase at the respective voltage node;
determining the respective value of the second voltage-constraint coefficient comprises determining a set of respective values of the second voltage-constraint coefficient, each respective value in the set of respective values of the second voltage-constraint coefficient corresponding to the respective phase at the respective voltage node;
determining the value of the first power-constraint coefficient comprises determining a set of respective values of the first power-constraint coefficient, each respective value in the set of respective values of the first power-constraint coefficient corresponding to the respective phase at the connection point; and
determining the value of the second power-constraint coefficient comprises determining a set of respective values of the second power-constraint coefficient, each respective value in the set of respective values of the second power-constraint coefficient corresponding to the respective phase at the connection point.

6. The device of claim 1 , wherein:
determining the respective value of the first voltage-constraint coefficient comprises:
determining, based on the respective previous value of the first voltage-constraint coefficient, the minimum voltage value, and the respective voltage value in the plurality of voltage values that corresponds to the respective voltage node, a respective first voltage coefficient offset value;
scaling the respective first voltage coefficient offset value by a step size to determine a respective scaled first voltage coefficient offset value;
responsive to determining that a respective first sum of the respective previous value of the first voltage-constraint coefficient and the respective scaled first voltage coefficient offset value is greater than zero, setting the respective value of the first voltage-constraint coefficient to be the respective first sum; and
responsive to determining that the respective first sum is less than or equal to zero, setting the respective value of the first voltage-constraint coefficient to be zero,

determining the respective value of the second voltage-constraint coefficient comprises:
determining, based on the respective previous value of the second voltage-constraint coefficient, the maximum voltage value, and the respective voltage value in the plurality of voltage values that corresponds to the respective voltage node, a respective second voltage coefficient offset value;
scaling the respective second voltage coefficient offset value by the step size to determine a respective scaled second voltage coefficient offset value;
responsive to determining that a respective second sum of the respective previous value of the second voltage-constraint coefficient and the respective scaled second voltage coefficient offset value is greater than zero, setting the respective value of the second voltage-constraint coefficient to be the respective second sum; and
responsive to determining that the respective second sum is less than or equal to zero, setting the respective value of the second voltage-constraint coefficient to be zero,

determining the value of the first power-constraint coefficient comprises:
determining, based on the previous value of the first power-constraint coefficient, the power setpoint for the connection point, an accuracy value, and the power value, a first power coefficient offset value;
scaling the first power coefficient offset value by the step size to dete

Assignees

• Alliance Sustainable Energy
• Univ Catholique Louvain
• Avance For Sustainable Energy Llc

Inventors

• Dall'Anese Emiliano
• Bernstein Andrey
• SIMONETTO Andrea

Classifications

• H02J2103/30

  Simulating, planning, modelling, reliability check or computer assisted design [CAD] of electric power networks · CPC title

• H02J3/00

  Circuit arrangements for AC mains or AC distribution networks · CPC title

• H02J3/46

  Controlling the sharing of generated power between the generators, sources or networks · CPC title

• H02J3/32

  using batteries or super capacitors with converting means · CPC title

• Y02E60/00

  Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation · CPC title