System and method for management of a DC and AC bus microgrid

• US 9,035,492 B1
• Filed: 03/22/2012
• Issued: 05/19/2015
• 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
• Primary Examiner(s): Kaplan, Hal
• Application Number:
  US13/427,876
• Time in Patent Office: 1,153 Days
• Field of Search: 307/26, 307/64, 307/65, 307/66, 700/286
• US Class Current: 307/26
• CPC Class Codes: G05F 5/00 Systems for regulating electric variables by detecting deviations in the electric input to the system and thereby controlling a device within the system to obtain a regulated output
• CPC Class Codes: H02J 2300/10 The dispersed energy generation being of fossil origin, e.g. diesel generators
• CPC Class Codes: H02J 3/32 using batteries with converting means
• CPC Class Codes: H02J 3/381 Dispersed generators
• CPC Class Codes: H02J 7/00 Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries
• CPC Class Codes: H02J 9/00 Circuit arrangements for emergency or stand-by power supply, e.g. for emergency lighting

Abstract

Systems and methods are described herein for managing the operations of a microgrid module. The 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 power management software module and a control software module installed on a microgrid computer. The power management software module uses received business parameters to create rules for applying to the operation of the microgrid module. The rules are stored locally at the microgrid computer so that they can be quickly accessed by a control software module. The control software module uses the rules in combination with data collected from sensors installed in the physical circuitry layer of the microgrid module to control the operations of the microgrid module.

Claims

1. A method for managing a microgrid module comprising:

a microgrid computer storing a business parameter;

a power management software module converting the business parameter into a rule;

the power management software module storing the rule in a computer-readable memory within the microgrid computer, the rule for use by a control software module;

the control software module receiving input from a sensor indicating an interruption in a power flow from a first power source supplying power to the microgrid module;

the control software module comparing the input to the rule stored in the computer-readable memory and selecting a command;

the control software module sending the command to a controllable element, the command directing the controllable element to permit power delivery to the microgrid module from a second power source coupled to the microgrid module.

2. The method of claim 1, wherein the first power source is an AC power grid supplying power to an AC input bus of the microgrid module.

3. The method of claim 1, wherein the second power source supplies power to a DC bus from one or more of a solar power source, a wind power source, and a biofuel power source.

4. The method of claim 3, wherein the power supplied to the DC bus from the second power source is supplied to a load coupled to the DC bus.

5. The method of claim 3, wherein the power supplied to the DC bus from the second power source is converted to AC power and supplied to a load via an AC output bus.

6. The method of claim 1, further comprising the step of the control software module storing the received input in the computer-readable memory.

7. The method of claim 6, further comprising the steps of the power management software module:

retrieving the stored input;

modifying the rule based on the input; and

storing the modified rule in the computer-readable memory.

8. A computer-readable medium comprising computer-executable program instructions for managing a microgrid module, the computer-executable instructions for execution by a computer comprising a processor, the computer-executable instructions comprising:

first program instructions for the computer to store a business parameter in a computer-readable memory;

second program instructions for a power management software module to convert the business parameter to a rule and store the rule in the computer-readable memory;

third program instructions for a control software module to receive data from a sensor indicating an interruption in a power flow from a first power source to the microgrid module;

fourth program instructions for the control software module to compare the received data to the rule stored in the computer-readable memory and to select a command;

fifth program instructions for the control software module to transmit the command to a controllable element, the command directing the controllable element to permit power delivery to the microgrid module from a second power source coupled to the microgrid module.

9. The computer-readable medium of claim 8, further comprising

sixth program instructions for the control software module to store the received data in the computer-readable memory.

10. The computer-readable medium of claim 8, further comprising

seventh program instructions for the power management software module to:

retrieve the stored data;

modify the stored rule based on the stored data; and

store the modified rule in the computer-readable memory.

11. The computer-readable medium of claim 8, wherein the data from the sensor indicates an interruption in the power flow from an AC power grid supplying power to an AC input bus of the microgrid module.

12. The computer-readable medium of claim 8, wherein the second power source identified by the command in the fifth program instructions supplies power to a DC bus of the microgrid module, wherein the DC power is from one or more of a solar power source, a wind power source, and a biofuel power source.