METHOD AND SYSTEM FOR USING DEMAND SIDE RESOURCES TO PROVIDE FREQUENCY REGULATION USING A DYNAMIC ALLOCATION OF ENERGY RESOURCES

• US 20170104331A1
• Filed: 12/22/2016
• Published: 04/13/2017
• Est. Priority Date: 12/07/2012
• Status: Active Grant

• Current Assignee: Battelle Memorial Institute
• Original Assignee: Battelle Memorial Institute
• Inventors: Thornton, Douglas, Rehberg, Eric, Adams, Lauren
• Granted Patent: US 9,997,915 B2
• Time in Patent Office: Days
• CPC Class Codes: G05B 15/02 electric
• CPC Class Codes: H02J 13/00004 characterised by the power network being locally controlled
• CPC Class Codes: H02J 13/00007 using the power network as support for the transmission
• CPC Class Codes: H02J 13/00016 using a wired telecommunication network or a data transmission bus
• CPC Class Codes: H02J 13/00024 by means of mobile telephony
• CPC Class Codes: H02J 13/00026 involving a local wireless network, e.g. Wi-Fi, ZigBee or Bluetooth
• CPC Class Codes: H02J 2310/12 The local stationary network supplying a household or a building
• CPC Class Codes: H02J 2310/58 The condition being electrical
• CPC Class Codes: H02J 3/00 Circuit arrangements for ac mains or ac distribution networks
• CPC Class Codes: H02J 3/14 by switching loads on to, or off from, network, e.g. progressively balanced loading
• CPC Class Codes: H02J 4/00 Circuit arrangements for mains or distribution networks not specified as ac or dc
• CPC Class Codes: H02J 7/00036 Charger exchanging data with battery
• CPC Class Codes: H02J 7/02 for charging batteries from ac mains by converters
• CPC Class Codes: H02J 9/062 for AC powered loads
• CPC Class Codes: Y02B 70/3225 Demand response systems, e.g. load shedding, peak shaving
• CPC Class Codes: Y02B 90/20 Smart grids as enabling technology in buildings sector smart grids supporting the management or operation of end-user stationary applications in general, or like technologies with no associated climate change mitigation effect Y04S20/00
• CPC Class Codes: Y04S 20/12 Energy storage units, uninterruptible power supply [UPS] systems or standby or emergency generators, e.g. in the last power distribution stages
• CPC Class Codes: Y04S 20/222 Demand response systems, e.g. load shedding, peak shaving
• CPC Class Codes: Y04S 40/121 using the power network as support for the transmission
• CPC Class Codes: Y04S 40/124 using wired telecommunication networks or data transmission busses
• CPC Class Codes: Y04S 40/126 : using wireless data transmission

Abstract

Dispatch engines service endpoints by transmitting dispatch signals to the serviced endpoints that cause the endpoints to adjust their electric power consumption from the electric power grid in accord with a control signal received by the dispatch engine. A market interface dispatch engine receives its control signal from an electric power grid managing entity, and downstream dispatch engines form a hierarchy cascading downstream from the market interface dispatch engine with each downstream dispatch engine being an endpoint serviced by a dispatch engine located upstream in the hierarchy. The control signal received by each downstream dispatch engine comprises dispatch signals transmitted by the upstream dispatch engine. The endpoints further include electric power-consuming loads. A suitable load controller comprises separate power interface and logic elements operatively connected to define the load controller, with the logic element powered by low voltage DC power received from the power interface element.

Claims

1. An apparatus comprising:

a load controller configured to control electric power consumption by an electric power-consuming load in accord with a dispatch signal received by the load controller, the load controller including;

a power interface element comprising electric power circuitry configured to conduct AC electric power capable of powering the electric power-consuming load on or off; and

a logic element comprising an electronic data processing device configured to receive a dispatch signal that is updated at a time interval and to control power delivered to the electric power-consuming load by the power interface element based on the received dispatch signal;

wherein the power interface element includes switching circuitry to cycle power to the electric power-consuming load on and off within the time interval of the dispatch signal.

2. The apparatus of claim 1 wherein the switching circuitry cycles power to the load using pulse width modulation (PWM) with a duty cycle of the PWM adjusted to adjust a power draw of the electric power-consuming load in accord with the dispatch signal at a higher resolution than achievable by powering the electric power-consuming load on or off at the time interval of updating the dispatch signal.

3. The apparatus of claim 1 wherein the logic element and the power interface element are separate units with separate enclosures.

4. The apparatus of claim 1 further comprising said electric power-consuming load including:

a hot water tank; and

a water heater configured to heat water in the hot water tank;

wherein the load controller is operatively connected with the water heater to control power delivered to the water heater based on the received dispatch signal.

5. An apparatus comprising:

a load controller configured to control electric power consumption by an electric power-consuming load in accord with a dispatch signal received by the load controller, the load controller including;

a power interface element comprising a power interface element enclosure and electric power circuitry disposed inside the power interface element enclosure and configured to conduct AC electric power capable of powering the electric power-consuming load; and

a logic element comprising a logic element enclosure and an electronic data processing device disposed inside the logic element enclosure and configured to receive a dispatch signal and to control power delivered to the electric power-consuming load by the power interface element based on the received dispatch signal;

wherein the power interface element and the logic element are separate elements with separate power interface element and logic element enclosures.

6. The apparatus of claim 5 wherein the logic element receives operating electrical power from the power interface element.

7. The apparatus of claim 5 comprising a plurality of said load controllers each further including an antenna, the apparatus further comprising:

an Internet Protocol (IP) gateway, each load controller in wireless communication with the IP gateway via the antenna of the load controller to transmit a bid from the load controller to the IP gateway representing a level of energy need of the electric power-consuming load controlled by the load controller and to receive the dispatch signal from the IP gateway.

8. The apparatus of claim 7 wherein:

the logic element of each load controller includes an electronically programmable memory; and

the IP gateway is identical with the logic element of the load controllers and is configured by a setting in the electronically programmable memory to operate as the IP gateway.

9. The apparatus of claim 7 wherein:

the logic element of each load controller includes an electronically programmable memory; and

the IP gateway is the logic element of a primary load controller of the plurality of said load controllers and the logic element of the primary load controller is configured by a setting in the electronically programmable memory to operate as both the logic element of the primary load controller and as the IP gateway.

10. The apparatus of claim 5 wherein:

the logic element of the load controller includes an electronically programmable memory that stores configuration settings of the load controller.

11. The apparatus of claim 10 wherein the logic element of the load controller further includes a USB port, and the load controller is configured by adjusting the configuration settings stored in the electronically programmable memory via the USB port.

12. The apparatus of claim 11 wherein the logic element of the load controller does not include any user input buttons.

13. The apparatus of claim 10 wherein the configuration settings include an identification of a power interface element type of the power interface element.

14. An apparatus comprising:

a load controller configured to control electric power consumption by an electric power-consuming load in accord with a dispatch signal received by the load controller, the load controller including;

an antenna;

electric power circuitry configured to power the electric power-consuming load; and

an electronic data processing device programmed to transmit via the antenna a bid representing a level of energy need of the electric power-consuming load controlled by the load controller and to receive via the antenna a dispatch signal and to control power delivered to the electric power-consuming load by the electric power circuitry based on the received dispatch signal.

15. The apparatus of claim 14 wherein the dispatch signal is updated at a time interval and the electric power circuitry includes:

switching circuitry cycling power to the electric power-consuming load on and off within the time interval of the dispatch signal to adjust a power draw of the electric power-consuming load in accord with the dispatch signal at a higher resolution than achievable by powering the electric power-consuming load on or off at the time interval of updating the dispatch signal.

16. The apparatus of claim 15 wherein the switching circuitry cycles power to the load using pulse width modulation (PWM) with a duty cycle of the PWM adjusted to adjust a power draw of the electric power-consuming load in accord with the dispatch signal at a higher resolution than achievable by powering the electric power-consuming load on or off at the time interval of updating the dispatch signal.

17. The apparatus of claim 15 wherein the switching circuitry comprises solid state relays.

18. The apparatus of claim 14 comprising a plurality of said load controllers, the apparatus further comprising:

an Internet Protocol (IP) gateway, each load controller transmitting via the antenna the bid to the IP gateway and receiving via the antenna the dispatch signal from the IP gateway.

19. The apparatus of claim 14 wherein the load controller further includes:

an electronically programmable memory that stores configuration settings of the load controller; and

a USB port, the load controller being configured by adjusting the configuration settings stored in the electronically programmable memory via the USB port.

20. The apparatus of claim 19 wherein the load controller does not include any user input buttons.