Real-time power line rating

• US 8,744,790 B2
• Filed: 02/26/2013
• Issued: 06/03/2014
• Est. Priority Date: 11/06/2008
• Status: Expired due to Fees

• Current Assignee: Southwire Company
• Original Assignee: Southwire Company
• Inventors: Lancaster, Mark
• Primary Examiner(s): Charioui, Mohamed
• Application Number:
  US13/776,956
• Publication Number:
  US 20130179079A1
• Time in Patent Office: 462 Days
• Field of Search: 702/58, 702/60, 702/64, 702/65, 702/81, 702/90, 702/91, 702/130, 702/136, 702182-185, 702/188, 702/193, 324/127
• US Class Current: 702/64
• CPC Class Codes: G01R 21/06 by measuring current and voltage G01R21/08 - G01R21/133 take precedence
• CPC Class Codes: H02J 3/00 Circuit arrangements for ac mains or ac distribution networks

Abstract

Real-time power line rating may be provided. First, sensor data may be received corresponding to a conductor of a power line. The sensor data may provide real-time weather conditions for the conductor'"'"'s environment. The sensor data may be received from a sensor device configured to collect the sensor data. The sensor data may correspond to the weather conditions at a location of the sensor device on the power line. Next, design limitations for the power line having the conductor may be received. The conductor of the power line may have a design ampacity based upon the design limitations and assumed weather conditions for the conductor'"'"'s environment. Then a dynamic ampacity may be calculated for the power line based upon the received sensor data and the received design limitations for the power line. The power line may then be operated according to the calculated dynamic ampacity instead of the design ampacity.

Claims

1. A system for providing a real-time power line rating, the system comprising:

a sensor device configured to collect sensor data, wherein the sensor data comprises at least one of;

weather conditions at a location of the sensor device on a power line, an amount of current flowing through the power line, and a real-time temperature of the power line; and

a supervisory control and data acquisition (SCADA) system configured to;

receive the sensor data from the sensor device,

calculate a dynamic ampacity for the power line based on a heat-storage capacity of the conductor, the heat-storage capacity being determined from the sensor data, wherein calculating the dynamic ampacity comprises applying at least a portion of the sensor data that would produce a most conservative dynamically calculated ampacity for the power line, and

dynamically alter the amount of current flowing through the power line based on the calculated dynamic ampacity.

2. The system of claim 1, wherein the supervisory control and data acquisition (SCADA) system being configured to calculate the dynamic ampacity comprises the supervisory control and data acquisition (SCADA) system being configured to calculate the dynamic ampacity having a value not to cause the maximum sag for which the conductor of the power line was designed to be exceeded.

3. The system of claim 1, wherein the supervisory control and data acquisition (SCADA) system being configured to calculate the dynamic ampacity comprises the supervisory control and data acquisition (SCADA) system being configured to calculate the dynamic ampacity having a value not to cause damage to the conductor.

4. The system of claim 1, wherein the supervisory control and data acquisition (SCADA) system is further configured to allow operation of the power line up to the calculated dynamic ampacity.

5. The system of claim 1, wherein the sensor device receives its power to operate from the power line.

6. The system of claim 1, wherein the sensor device scavenge power to operate from the power line by using a current transformer (CT).

7. The system of claim 1, wherein the sensor device being configured to collect sensor data comprises the sensor device being configured to collect sensor data comprising ambient temperature of an environment around the conductor at the location.

8. The system of claim 1, wherein the sensor device being configured to collect sensor data comprises the sensor device being configured to collect sensor data comprising temperature of the conductor at the location.

9. A method of providing a real-time power line rating, the method comprising:

receiving design limitations for a power line having a conductor, the conductor of the power line having a design ampacity based upon the design limitations and assumed weather conditions for the conductor'"'"'s environment;

receiving sensor data corresponding to the conductor of the power line, the sensor data providing at least one of;

real-time weather conditions at a location of a sensor device on the power line, an amount of current flowing through the power line, and a real-time temperature of the power line;

calculating a dynamic ampacity for the power line based upon the received sensor data and the received design limitations for the power line, wherein calculating the dynamic ampacity comprises applying at least a portion of the sensor data that would produce a most conservative dynamically calculated ampacity for the power line; and

operating the power line according to the dynamic ampacity instead of the design ampacity.

10. The method of claim 9, wherein receiving the sensor data comprises receiving the sensor data comprising an ambient temperature of an environment around the conductor at a point along the power line.

11. The method of claim 9, wherein receiving the sensor data comprises receiving the sensor data comprising a wind speed around the conductor at a point along the power line.

12. The method of claim 9, wherein receiving the sensor data comprises receiving the sensor data comprising a solar radiation level at the conductor at a point along the power line.

13. The method of claim 9, wherein receiving the sensor data comprises receiving sensor data comprising a temperature of the conductor at a point along the power line.

14. The method of claim 9, wherein receiving the sensor data comprises receiving the sensor data comprising the sensor data taken at a plurality of points along the power line.

15. The method of claim 9, wherein receiving the design limitations comprises receiving data indicating the maximum sag the conductor of the power line was designed to have.

16. The method of claim 9, wherein calculating the dynamic ampacity comprises calculating the dynamic ampacity having a value not to cause the maximum sag for which the conductor of the power line was designed to be exceeded.

17. The method of claim 9, wherein calculating the dynamic ampacity comprises calculating the dynamic ampacity having a value not to cause damage to the conductor.

18. The method of claim 9, wherein operating the power line according to the dynamic ampacity instead of the design ampacity comprises causing the power line to operate between the calculated dynamic ampacity and the design ampacity when the calculated dynamic ampacity is greater than the design ampacity.

19. The method of claim 9, wherein operating the power line according to the dynamic ampacity instead of the design ampacity comprises causing the power line to operate at less than the calculated dynamic ampacity when the calculated dynamic ampacity is less than the design ampacity.

20. A non-transitory computer-readable medium that stores a set of instructions which when executed perform a method for providing a real-time power line rating, the method executed by the set of instructions comprising:

receiving design limitations for a power line having a conductor, the conductor of the power line having a design ampacity based upon the design limitations and assumed weather conditions for the conductor'"'"'s environment wherein receiving design limitations comprises receiving data indicating the maximum sag the conductor of the power line was designed to have;

receiving sensor data from a sensor device configured to collect the sensor data, the sensor data corresponding to the conductor of the power line, the sensor data providing real-time weather conditions for the conductor'"'"'s environment wherein receiving the sensor data comprises receiving the sensor data comprising the sensor data taken at a plurality of points along the power line wherein receiving sensor data comprises receiving at least one of the following;

sensor data comprising ambient temperature of environment around the conductor at a point along the power line, receiving sensor data comprises receiving sensor data comprising wind speed around the conductor at a point along the power line, sensor data comprising solar radiation at the conductor at a point along the power line, and sensor data comprising temperature of the conductor at a point along the power line;

calculating a dynamic ampacity for the power line based upon the received sensor data, the real time temperature of the power line, the weather conditions, and the received design limitations for the power line, wherein calculating the dynamic ampacity comprises calculating the dynamic ampacity having a value not to cause the maximum sag for which the conductor of the power line was designed to be exceeded and calculating the dynamic ampacity having a value not to cause damage to the conductor, and wherein calculating the dynamic ampacity comprises applying at least a portion of the sensor data that would produce a most conservative dynamically calculated ampacity for the power line; and

operating the power line according to the dynamic ampacity instead of the design ampacity wherein operating the power line according to the dynamic ampacity instead of the design ampacity comprises one of the following;

causing the power line to operate between the calculated dynamic ampacity and the design ampacity when the calculated dynamic ampacity is greater than the design ampacity and causing the power line to operate at less than the calculated dynamic ampacity when the dynamic ampacity is less than the design ampacity.