Method for routing power across multiple microgrids having DC and AC buses

• US 8,649,914 B2
• Filed: 05/06/2013
• Issued: 02/11/2014
• Est. Priority Date: 04/15/2010
• Status: Active Grant

• Current Assignee: Science Applications International Corporation
• Original Assignee: Science Applications International Corporation
• Inventors: Miller, Landon Cabell Garland, Barrett, David Michael, Kajs, John Patrick
• Primary Examiner(s): JARRETT, RYAN A
• Application Number:
  US13/887,619
• Publication Number:
  US 20130274947A1
• Time in Patent Office: 281 Days
• Field of Search: None
• US Class Current: 700/298
• CPC Class Codes: G05B 19/0428 Safety, monitoring G05B19/0423 takes precedence
• CPC Class Codes: G05B 2219/2203 Grid, array of controllers
• CPC Class Codes: G05F 1/66 Regulating electric power
• CPC Class Codes: G06F 1/263 Arrangements for using multiple switchable power supplies, e.g. battery and AC G06F1/30 takes precedence
• CPC Class Codes: H02J 13/00012 using an auxiliary transmission line
• CPC Class Codes: H02J 2310/10 The network having a local or delimited stationary reach
• CPC Class Codes: H02J 3/06 Controlling transfer of power between connected networks; Controlling sharing of load between connected networks
• CPC Class Codes: H02J 3/34 Arrangements for transfer of electric power between networks of substantially different frequency
• CPC Class Codes: H02J 4/00 Circuit arrangements for mains or distribution networks not specified as ac or dc

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 micro grid 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 micro grid 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.

Claims

1. A method for controlling the operations of a plurality of micro grid modules comprising:

a first microgrid module receiving power on a DC bus and supplying power to an AC output bus;

a power router detecting a demand for power from a second microgrid module, the power router sending demand data to a power router software module;

the power router software module comparing the demand data to a rule stored in a computer readable memory and authorizing the power router to supply power to the second micro grid;

a sensor detecting an interruption in the power supplied on the DC bus to the first microgrid module;

a control software module receiving data from the sensor and determining the first microgrid module requires power from the second microgrid module;

the power router software module sending a command to the power router to draw power from the second microgrid module; and

the power router decreasing the supply of power from the first micro grid module to the second microgrid module and increasing the power drawn from the second microgrid module to the first microgrid module.

2. The method of claim 1, wherein the power router software module receives commands from the control software module.

3. The method of claim 1, wherein the power router software module is installed on a computer in the power router.

4. The method of claim 1, wherein the power router software module is installed in a distinct power router controlling computer coupled to the power router.

5. The method of claim 1, wherein the voltage of the power supplied from the first microgrid module is first increased and then decreased before it is supplied to the second microgrid module.

6. The method of claim 1, wherein the voltage of the power supplied from the second microgrid module is first increased and then decreased before it is supplied to the first microgrid module.

7. The method of claim 1, wherein the power supplied from the first microgrid is converted from DC power to AC power for transmission to the second microgrid.

8. The method of claim 1, wherein the power supplied from the second microgrid is converted from DC power to AC power for transmission to the first micro grid.