Systems and method for routing power across multiple microgrids having DC and AC buses

Patent metadata

Field	Value
Publication number	US-10459473-B2
Application number	US-201615265362-A
Country	US
Kind code	B2
Filing date	Sep 14, 2016
Priority date	Apr 15, 2010
Publication date	Oct 29, 2019
Grant date	Oct 29, 2019

Abstract

Systems and methods are described herein for managing the operations of a plurality of microgrid modules. A microgrid module includes transformers and/or power converters necessary for modifying the input AC or DC power sources to meet the required characteristics of the output power. The microgrid module further comprises a control software module and a power router software module. The control software module receives data from sensors in the microgrid module and controls the flow of power with controllable elements. The power router software module controls the operation of the power router. The power router can detect changes in demand for power within the microgrid module or from other microgrid modules. The power router can adjust the flow of power between the microgrid modules in response to changes in the supply of power to the microgrid module and changes in the demand for power from the microgrid module.

First claim

We claim:

1. A non-transitory computer readable medium comprising computer executable program instructions for managing the operation of a plurality of microgrid modules, the computer executable program instructions comprising:
first program instructions for receiving power flow data sensed by a sensor indicating a first microgrid module is receiving power on a DC bus, converting the power to AC power, and supplying the power directly to a load which is a second microgrid module on an AC output bus via an inter-microgrid connection;
second program instructions for receiving demand data sensed by a sensor indicating a demand for additional power from the load;
third program instructions for comparing the demand data to rules stored in a computer readable memory, determining a command to send to a controllable element of the first microgrid module, and sending the command to the controllable element to control an operation of the first microgrid module,
wherein the non-transitory computer executable program instructions are executed on a computer comprising a processor and a memory.

2. A non-transitory computer readable medium according to claim 1 , wherein demand data is received by a sensor of the first microgrid module.

3. A computer readable medium according to claim 2 , wherein the sensor is capable of sensing one or more of the group consisting of: a direction, voltage, current, power, change in direction, change in voltage, change in current, change in power, rate of change in direction, rate of change in voltage, rate of change in current, and a rate of change in power.

4. A computer readable medium according to claim 1 , wherein:
the controllable element is a power router element; and
the command is to increase the power supplied to the load.

5. A non-transitory computer readable medium according to claim 4 , wherein the computer executable program instructions further comprise:
fourth program instructions to retrieve one or more business parameters stored in the computer-readable memory and to convert the one or more business parameters into the rules.

6. A non-transitory computer readable medium according to claim 5 , wherein the business parameters comprise one or more of the group consisting of: a cost of power from an AC power grid, a cost of power from an alternate power source coupled to the first microgrid module, an expected load demand, and a power source preference.

7. A non-transitory computer readable medium according to claim 6 , wherein the rules comprise one or more of the group consisting of: a time when the first microgrid module will draw power from the AC power grid, the alternate power source, or from the second microgrid module.

8. A non-transitory computer readable medium according to claim 7 , wherein the computer executable program instructions further comprise:
fifth program instructions to adjust the rules based on historical demand data and log data describing operation of the first microgrid module over time.

9. A non-transitory computer readable medium comprising computer executable program instructions for managing the operation of a plurality of microgrid modules, the computer executable program instructions comprising:
first program instructions for receiving power flow data sensed by a sensor indicating a first microgrid module is receiving power on a DC bus, converting the power to AC power, and supplying the power directly to a second microgrid module on an AC output bus via an inter-microgrid connection;
second program instructions for receiving demand data sensed by a sensor indicating a demand for additional power from a second microgrid module;
third program instructions for comparing the demand data to rules stored in a computer readable memory, determining a command to increase the power supplied to the second microgrid module, and sending the command to a controllable element to control an operation of the first microgrid module, wherein the rules include a time when the first microgrid module will draw power from one of an AC power grid and an alternate power source,
and further wherein the non-transitory computer executable program instructions are executed on a computer comprising a processor and a memory.

10. A non-transitory computer readable medium according to claim 9 , wherein the computer executable program instructions further comprise:
fourth program instructions to retrieve one or more business parameters stored in the computer-readable memory and to convert the one or more business parameters into the rules.

11. A non-transitory computer readable medium according to claim 10 , wherein the business parameters comprise one or more of the group consisting of: a cost of power from an AC power grid, a cost of power from an alternate power source coupled to the first microgrid module, an expected load demand, and a power source preference.

12. A computer readable medium according to claim 9 , wherein:
the controllable element is a power router element.

13. A non-transitory computer readable medium comprising computer executable program instructions for managing the operation of a plurality of microgrid modules, the computer executable program instructions comprising:
first program instructions for receiving power flow data sensed by a sensor indicating a first microgrid module is receiving power on a DC bus, converting the power to AC power, and supplying the power directly to a load which is a second microgrid module on an AC output bus via an inter-microgrid connection;
second program instructions for receiving demand data sensed by a sensor indicating a demand for additional power from the load;
third program instructions for comparing the demand data to rules stored in a computer readable memory, determining a command to send to a controllable element of the first microgrid module, and sending the command to the controllable element to control an operation of the first microgrid module;
fourth program instructions to retrieve one or more business parameters stored in the computer-readable memory and to convert the one or more business parameters into the rules;
fifth program instructions to adjust the rules based on historical demand data and log data describing operation of the first microgrid module over time,
wherein the non-transitory computer executable program instructions are executed on a computer comprising a processor and a memory.

14. A computer readable medium according to claim 13 , wherein:
the controllable element is a power router element; and
the command is to increase the power supplied to the load.

Assignees

• Science Appl Int Corp

Inventors

• Miller Landon Cabell Garland
• Barrett David Michael
• Kajs John Patrick

Classifications

• H02J13/1317

  using an auxiliary transmission line · CPC title

• H02J2105/10

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

• H02J3/06

  Controlling the transfer of power between connected networks; Controlling load sharing between connected networks · CPC title

• H02J4/00

  Circuit arrangements for mains or distribution networks not specified as AC or DC; Circuit arrangements for mains or distribution networks combining AC and DC sections or sub-networks (arrangements using intermediate DC-AC-DC conversion H02J1/002; arrangements using high-voltage DC [HVDC] links H02J3/36) · CPC title

• G05B2219/2203

  Grid, array of controllers · CPC title