Metering and communications for distributed energy resource devices

Patent metadata

Field	Value
Publication number	US-11316348-B2
Application number	US-202017122623-A
Country	US
Kind code	B2
Filing date	Dec 15, 2020
Priority date	Oct 11, 2019
Publication date	Apr 26, 2022
Grant date	Apr 26, 2022

Abstract

A DER (distributed energy resource) device includes a metrology module and a communications module. The metrology module monitors the output of the DER device and the communications module provides bidirectional communications across a communications network to control the DER device. The control of the DER devices may include commands to connect the DER device to the grid, to disconnect the DER device to the grid, to connect the DER device to the premises, or to adjust a power characteristic of the output of the DER device.

First claim

What is claimed is:

1. A method for controlling a connection of a DER (distributed energy resource) device located at a premises to an electric grid, comprising:
analyzing, at a system remote from the premises, data related to current demand for energy resources provided by the electric grid to determine how to control a connection of the DER device to the electric grid;
when the data indicates a condition where the DER device may supply energy to the electric grid, generating, by the system remote from the premises, at least one command to enable the DER device to supply energy to the electric grid and to control a rate of energy transfer from the DER device to the electric grid; and
transmitting, by the system remote from the premises, the at least one command to enable the DER device to supply energy to the electric grid and to control the rate of energy transfer from the DER device to the electric grid, wherein the at least one command is routed across a communications network that includes the DER device.

2. The method of claim 1 , further comprising:
when the data indicates a condition where the DER device may consume energy from the electric grid, generating, by the system remote from the premises, at least one command to enable the DER device to consume energy from the electric grid and to control a rate of energy transfer from electric grid to the DER device; and
transmitting, by the system remote from the premises, the at least one command to enable the DER device to consume energy from the electric grid and to control the rate of energy transfer from the electric grid to the DER device, wherein the at least one command is routed across a communications network that includes the DER device.

3. The method of claim 2 , wherein the system remote from the premises is a head-end system, further comprising:
prior to transmitting the at least one command to enable the DER device to consume energy from the electric grid, determining, at the head-end system, a load on a local distribution device, wherein the DER device receives energy via the local distribution device.

4. The method of claim 2 , wherein the system remote from the premises is a head-end system, further comprising:
after transmitting the at least one command to enable the DER device to consume energy from the electric grid, receiving at the head-end system, a communication from the DER device that includes information about operation of the DER device.

5. The method of claim 1 , wherein the at least one command to enable the DER device to supply energy to the electric grid and to control a rate of energy transfer from the DER device to the electric grid comprises a command to the DER device to control a control device to operatively connect an output of the DER device to the electric grid.

6. The method of claim 1 , wherein the at least one command to enable the DER device to supply energy to the electric grid and to control a rate of energy transfer from the DER device to the electric grid comprises a command to a meter located at the premises to control a control device to operatively connect an output of the DER device to the electric grid.

7. The method of claim 1 , wherein the system remote from the premises is a head-end system, further comprising:
after transmitting the at least one command to enable the DER device to supply energy to the electric grid, receiving at the head-end system, a communication from the DER device that includes an amount of energy supplied to the electric grid by the DER device over an interval and a time associated with the interval.

8. The method of claim 1 , wherein the system remote from the premises is an edge computing device that provides metering services or control services for the DER device.

9. The method of claim 1 , further comprising:
prior to transmitting the at least one command to enable the DER device to supply energy to the electric grid, transmitting, by the system remote from the premises, a command to prevent the DER device from consuming energy from the electric grid.

10. A system for controlling a connection of a DER device located at a premises to an electric grid, comprising:
a communications module that provides bidirectional communications between the DER device and a system remote from the premises, wherein communications between the communications module and the system remote from the premises are routed through a gateway device;
a controller that controls a control device based on a command received by the communications module, wherein the control device controls a connection of an output of the DER device to a panel located at the premises; and
a metrology module that measures an amount of energy supplied to the electric grid by the output of the DER device over an interval and associating a time with the interval.

11. The system of claim 10 further comprising:
the panel having a first interface configured to connect the DER device to the panel, a second interface configured to connect a meter to the panel, and a first circuit breaker associated with the DER device.

12. The system of claim 10 , wherein the communications module, the metrology module, and the controller are integrated into the DER device.

13. The system of claim 10 , wherein the controller controls the control device based on a command generated by the system remote from the premises and received by the communications module.

14. The system of claim 11 , wherein the DER device supplies power to the premises when a disconnect switch in the meter is open, the control device enables the DER device to provide power to the panel, and the panel connects the DER device to at least one load at the premises.

15. The system of claim 10 , wherein the DER device is a solar device and the control device is an inverter.

16. The system of claim 10 , wherein the controller controls the control device based on a variable rate structure to supply energy to the electric grid when a current rate exceeds a supply rate threshold.

17. The system of claim 16 , wherein the metrology module determines an amount of energy supplied to the electric grid by the DER device and the communications module communicates the amount of energy to the system remote from the premises.

18. A system for communicating with at least one DER device located at a premises, comprising:
a first communications module associated with a first DER device, wherein the first DER device is located at the premises and is connected to a panel;
a gateway communications module associated with a gateway device, wherein the gateway communications module communicates with the first communications module and a central system; and
a second communications module associated with a meter, wherein the meter is located at the premises and is connected to the panel, wherein the second communications module communicates with the central system;
wherein the gateway communications module receives a first control instruction from the central system and transmits the first control instruction to the first communications module, and wherein the first DER device controls energy generated by the first DER device based on the first control instruction.

19. The system of claim 18 , wherein the first DER device controls a control device of the first DER device to control a connection of the first DER device to an electric grid based on the first control instruction.

20. The system of claim 18 , wherein communications between the second communications module and the central system are rout

Assignees

• Landis & Gyr Innovations Inc

Inventors

• Karlgaard Matt
• Torpy Keith

Classifications

• H02J2101/24

  Photovoltaics · CPC title

• H02J13/12

  Monitoring network conditions, e.g. electrical magnitudes or operational status · CPC title

• H02J2105/12

  supplying households or buildings · CPC title

• H02J2105/10

  Local stationary networks having a local or delimited stationary reach · CPC title

• H02J13/333

  the equipment forming part of substations · CPC title