Systems and methods for stabilizing power rate of change within generator based applications

• US 9,190,852 B2
• Filed: 09/21/2012
• Issued: 11/17/2015
• Est. Priority Date: 09/21/2012
• Status: Active Grant

• Current Assignee: Caterpillar Incorporated
• Original Assignee: Caterpillar Incorporated
• Inventors: Bienfang, David T., Hamann, Robert A., Onsager, Michael G., Brandt, Michael E., Algrain, Marcelo C.
• Primary Examiner(s): Amaya, Carlos
• Application Number:
  US13/624,600
• Publication Number:
  US 20140084685A1
• Time in Patent Office: 1,152 Days
• Field of Search: 307/18, 307/29, 307/31
• US Class Current: 1/1
• CPC Class Codes: H02J 2310/46 for ICE-powered road vehicles
• CPC Class Codes: H02J 3/32 using batteries with converting means
• CPC Class Codes: H02J 7/00 Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries
• CPC Class Codes: H02J 7/1446 in response to parameters of a vehicle
• CPC Class Codes: H02J 7/345 using capacitors as storage or buffering devices
• CPC Class Codes: H02J 9/00 Circuit arrangements for emergency or stand-by power supply, e.g. for emergency lighting
• CPC Class Codes: Y02T 10/92 Energy efficient charging or discharging systems for batteries, ultracapacitors, supercapacitors or double-layer capacitors specially adapted for vehicles

Abstract

Systems and methods for monitoring an electrical energy storage unit and a parameter related to the load and based on the monitoring, if the load parameter is greater than a second rate of change of electrical power for a second component of an electrical power system, providing power from the electrical energy storage unit to the second component until the load parameter and the second component have equivalent rates of change of electrical power.

Claims

1. A method for stabilizing power rate of change in an electrical power system using an electrical energy storage unit, the method comprising:

receiving electrical power from an initial source;

providing electrical power within the electrical power system;

receiving a notification that a first rate of change of electrical power is being provided to a first component of the electrical power system and a second rate of change of electrical power is being provided to a second component of the electrical power system;

charging the electrical energy storage unit with a load from the first and second component of the electrical power system;

monitoring the electrical energy storage unit and a parameter related to the load; and

based on the monitoring, if the load parameter is greater than the second rate of change of electrical power for the second component of the electrical power system, providing power from the electrical energy storage unit to the second component until the load parameter and the second component have equivalent rates of change of electrical power.

2. The method of claim 1, wherein the first component of the electrical power system comprises a device configured to operate using a generator.

3. The method of claim 2, wherein the device comprises at least one of an electric rope shovel, a long wall miner, and an electric power drill.

4. The method of claim 2, wherein the device comprises a mining excavator.

5. The method of claim 3, wherein the mining excavator comprises at least one of an electric shovel;

and a dragline.

6. The method of claim 1, wherein the second component of the electrical power system comprises a generator.

7. The method of claim 1, further comprising:

if the electrical power system is operating with a regenerative load and the electrical energy storage unit is charged, absorbing, by a resistor, electrical power from the electrical power system.

8. The method of claim 1, further comprising:

if the load parameter is less than or equal to the rate of change of power for the second component of the electrical power system, recharging the electrical energy storage unit.

9. The method of claim 1, wherein the monitoring of the electrical energy storage unit and the load parameter is performed by a electrical energy storage unit control system.

10. The method of claim 9, wherein the electrical energy storage unit control system is integrated into the first component of the electrical power system.

11. The method of claim 1, wherein the electrical energy storage unit comprises at least one electrical energy storage unit.

12. An electrical power system for stabilizing power in an electrical power system using an electrical energy storage unit, the electrical power system comprising:

a first component;

a second component;

an electrical energy storage unit; and

a processor configured to;

receive electrical power from an initial source;

provide electrical power within the electrical power system;

receive a notification that a first rate of change of electrical power is being provided to a first component of the electrical power system and a second rate of change of electrical power is being provided to a second component of the electrical power system;

charge the electrical energy storage unit with a load from the first and second component of the electrical power system;

monitor the electrical energy storage unit and a parameter related to the load; and

based on the monitoring, if the load parameter is greater than the second rate of change of electrical power for the second component of the electrical power system, provide power from the electrical energy storage unit to the second component until the load parameter and the second component have equivalent rates of change of electrical power.

13. The system of claim 12, wherein the first component of the electrical power system comprises a device configured to operate using a generator.

14. The system of claim 12, wherein the device comprises at least one of an electric rope shovel, a long wall miner, and an electric power drill.

15. The system of claim 12, wherein the second component of the electrical power system comprises a generator.

16. The system of claim 12, wherein the electrical energy storage unit comprises a electrical energy storage unit.

17. A non-transitory computer-readable medium having instructions therein, the instructions being executable by a processor to cause the processor to perform operations stabilizing power rate of change in an electrical power system using an electrical energy storage unit, the operations comprising:

receiving electrical power from an initial source;

providing electrical power within the electrical power system;

receiving a notification that a first rate of change of electrical power is being provided to a first component of the electrical power system and a second rate of change of electrical power is being provided to a second component of the electrical power system;

charging the electrical energy storage unit with a load from the first and second component of the electrical power system;

monitoring the electrical energy storage unit and a parameter related to the load; and

based on the monitoring, if the load parameter is greater than the second rate of change of electrical power for the second component of the electrical power system, providing power from the electrical energy storage unit to the second component until the load parameter and the second component have equivalent rates of change of electrical power.

18. The non-transitory computer-readable medium of claim 17, the operations further comprising:

if the electrical power system is operating with a regenerative load and the electrical energy storage unit is charged, absorbing, by a resistor, electrical power from the electrical power system.

19. The non-transitory computer-readable medium of claim 17, the operations further comprising:

if the load parameter is less than or equal to the rate of change of power for the second component of the electrical power system, recharging the electrical energy storage unit.

20. The non-transitory computer-readable medium of claim 17, wherein the monitoring of the electrical energy storage unit and the load parameter is performed by a electrical energy storage unit control system.