CN-122003793-A - Load management system of power grid

Abstract

Systems and methods for load management of an electrical grid. An example load management system includes a load management server associated with a grid company and a first billing electricity meter communicatively connected to the load management server. The first billing electricity meter includes a first controller configured to determine a user priority of load distribution for a plurality of devices in communication with the first billing electricity meter and determine a current power drawn by the plurality of devices. The first controller is configured to transmit a load shedding command to the plurality of devices in response to the load shedding event and based on the user priority to indicate an amount of new power to be drawn by the plurality of devices and to transmit an indication of the load shedding event to the load management server.

Inventors

• David Donald Haines

Assignees

• 阿克拉技术公司

Dates

Publication Date

20260508

Application Date

20240807

Priority Date

20230809

Claims (20)

1. 1. A load management system, comprising: load management server associated with grid company, and A first billing electricity meter communicatively connected to the load management server, the first billing electricity meter comprising a first controller configured to: determining a user priority for load distribution of a plurality of devices in communication with the first meter, Determining a current power drawn by the plurality of devices, Transmitting a load shedding command to the plurality of devices in response to a load shedding event and based on the user priority to indicate an amount of new power to be drawn by the plurality of devices, the amount of new power to be drawn being less than a current power drawn by the plurality of devices, and Transmitting an indication of the load shedding event to the load management server.
2. 2. The load management system of claim 1, further comprising: A service transformer configured to receive power from the grid company, Wherein the first controller is further configured to: The amount of power output by the service transformer is monitored.
3. 3. The load management system of claim 2, wherein the first controller is further configured to: the load shedding event is determined when the current power drawn by the plurality of devices exceeds a power threshold.
4. 4. The load management system of claim 3, wherein the power threshold is a rated power of the service transformer.
5. 5. The load management system of claim 1, wherein the first controller is further configured to: And transmitting a registration message to the load management server, wherein the registration message comprises the identification code of the first charging ammeter.
6. 6. The load management system of claim 1, further comprising: A second charging meter communicatively connected to the load management server, the second charging meter comprising a second controller configured to: Transmitting a request to the load management server to request identification of the first billing electricity meter, and And establishing communication with the first charging ammeter.
7. 7. The load management system of claim 6, wherein the first controller is further configured to: Receiving a power request from the second meter, and A power command is transmitted to the second meter to indicate the amount of power allowed to be drawn.
8. 8. The load management system of claim 1, wherein the user priority indicates an order in which power is reduced to the plurality of devices.
9. 9. The load management system of claim 1, wherein the plurality of devices comprises an electric vehicle.
10. 10. A load management system, comprising: A service transformer configured to provide power, wherein the service transformer includes a transformer rating indicating a maximum available power; A plurality of charging electric meters, each of the plurality of revenue electric meters coupled to at least one load and configured to receive power from the service transformer, and A group host communicatively connected to each of the plurality of charging electricity meters, the group host comprising a controller configured to: Receiving a plurality of power requests, each power request received from one of the plurality of billing electric meters, Determining a plurality of power allocations based on the plurality of power requests and the transformer rating, and Transmitting one of the plurality of power allocations to each of the plurality of billing electricity meters included therein.
11. 11. The load management system of claim 10, wherein each power request is a percentage of the power available to the service transformer, and wherein the controller is further configured to: For each power request, multiplying the power request with the transformer rating to determine the plurality of power allocations.
12. 12. The load management system of claim 10, wherein the controller is further configured to: Receiving a plurality of instantaneous power measurements, each instantaneous power measurement received from one of the plurality of utility meters and indicating a current power drawn by the associated utility meter, Adding the plurality of instantaneous power measurements to determine a current instantaneous power measurement, an Subtracting the current instantaneous power measurement from the transformer rating to determine a margin power available for each charging meter.
13. 13. The load management system of claim 12, wherein each power request is a percentage of the power available to the service transformer, and wherein the controller is further configured to: multiplying the margin power with the power request to determine a power portion, and For each instantaneous power measurement, adding the power portion to the instantaneous power measurement to determine the plurality of power allocations.
14. 14. The load management system of claim 10, wherein the group master is connected to an Electric Vehicle Supply Equipment (EVSE), and wherein the controller is further configured to: a load shedding command is transmitted to an EVSE to instruct the EVSE to reduce power drawn from the service transformer.
15. 15. The load management system of claim 10, wherein the controller is further configured to: Determining whether a first one of the plurality of billing electric meters exceeds a corresponding power allocation, and An indication is recorded in a memory of the controller that the first charging meter exceeds a corresponding power allocation.
16. 16. A method for controlling power drawn from a service transformer, the method comprising: determining, with a first billing meter, a user priority for load distribution of a plurality of devices in communication with the first billing meter; Determining a current power drawn by the plurality of devices; Transmitting a load shedding command to the plurality of devices in response to a load shedding event and based on the user priority to indicate an amount of new power to be drawn by the plurality of devices, the amount of new power to be drawn being less than a current power drawn by the plurality of devices, and Transmitting an indication of the load shedding event to a load management server associated with the service transformer.
17. 17. The method of claim 16, further comprising: The load shedding event is determined when the current power drawn by the plurality of devices exceeds the rated power of the service transformer.
18. 18. The method of claim 17, further comprising: Transmitting a registration message to the load management server, the registration message including an identification code of the first charging meter, and Configuration information including a rated power of the transformer is received from the load management server.
19. 19. The method of claim 16, further comprising: Transmitting a request to the load management server using a second billing electric meter to request identification of the first billing electric meter, and And establishing communication with the first charging ammeter by using the second charging ammeter.
20. 20. The method of claim 19, further comprising: receiving a power request from the second charging meter using the first charging meter, and Transmitting a power command with the first meter to the second meter to indicate an amount of power allowed to be drawn.

Description

Load management system of power grid Cross Reference to Related Applications The present application claims priority from U.S. provisional patent application No. 63/518,352, filed 8/9 at 2023, which is incorporated herein by reference in its entirety. Technical Field Embodiments disclosed herein relate to load management of an electrical grid. Background It is common for a plurality of power services to share a common service transformer. The popularity of electric vehicles has led to significant changes in grid company grid loads. For example, a single electric vehicle charging load corresponds to two central air conditioning loads, and may double the load on the corresponding service transformer more than one time. In addition, electric vehicle charging loads exist throughout the year. Electric utility companies have come to appreciate this growing demand for electricity and have deployed electric vehicle supply equipment to service electric vehicles on the power grid. Disclosure of Invention Load centers in about 4800 thousands of households in the united states still employ 100A services. As homeowners upgrade devices in the home, services may need to be upgraded to adapt the home to today's increasing power demands. Electric Vehicle Supply Equipment (EVSE) is now being installed in the home to manage the charging of electric vehicles. These EVSEs add additional pressure to the load center, particularly when used in conjunction with ovens, ranges, dryers, air conditioners and other high power appliances. Increasing EVSE may cause the service to draw full power and exceed the capacity of the service transformer. Grid companies may curtail loads during periods of high usage to keep power below the capacity of the service transformer. However, the manner in which the load is reduced should not be inconvenient to consumers who may opt out of the load control program. Embodiments described herein provide load control systems that implement load shedding, including shedding electric vehicle charging, to protect service transformers and other power distribution and transmission infrastructure. Load control may also be used to address the problem of insufficient power generation. Embodiments described herein shed loads to meet local demand, power distribution demand, power transmission infrastructure means, and/or regional demand according to consumer-assigned priorities. According to one example, a load management system includes a load management server associated with a grid company and a first billing electricity meter communicatively connected to the load management server. The first billing electricity meter includes a first controller configured to determine a user priority of load distribution for a plurality of devices in communication with the first billing electricity meter and determine a current power drawn by the plurality of devices. The first controller is configured to transmit a load shedding command to the plurality of devices in response to the load shedding event and based on the user priority to indicate an amount of new power to be drawn by the plurality of devices and to transmit an indication of the load shedding event to the load management server. The amount of new power to be drawn is less than the current power drawn by the plurality of devices. In some aspects, the load management system further comprises a service transformer configured to receive power from the grid company, and the first controller is further configured to monitor an amount of power output by the service transformer. In some aspects, the first controller is further configured to determine a load shedding event when the current power drawn by the plurality of devices exceeds a power threshold. In some aspects, the power threshold is a rated power of the service transformer. In some aspects, the first controller is further configured to transmit a registration message to the load management server, the registration message including an identification code of the first charging meter. In some aspects, the load management system further comprises a second billing electricity meter communicatively connected to the load management server. The second charging meter includes a second controller configured to transmit a request to the load management server requesting identification of the first charging meter and establishing communication with the first charging meter. In some aspects, the first controller is further configured to receive a power request from the second meter and transmit a power command to the second meter to indicate the amount of power allowed to be drawn. In some aspects, the user priority indicates an order in which power is reduced to the plurality of devices. In some aspects, the plurality of devices includes an electric vehicle. According to another example, a load management system includes a service transformer configured to provide power, a plurality of billing electricity meters, and a grou