Method for monitoring power and current flow

• US 6,714,000 B2
• Filed: 06/14/1999
• Issued: 03/30/2004
• Est. Priority Date: 06/14/1999
• Status: Expired due to Term

• Current Assignee: Genscape Intangible Holding, Inc. (Daily Mail & General Trust Plc)
• Original Assignee: Genscape, Inc. (Verisk Analytics Incorporated)
• Inventors: Staats, Preston Trent
• Primary Examiner(s): Le, N.
• Assistant Examiner(s): KERVEROS, DEMETRIOS C
• Application Number:
  US09/332,850
• Publication Number:
  US 20020101231A1
• Time in Patent Office: 1,751 Days
• Field of Search: 324/126, 324/127, 324/529, 324/207.2, 324/239, 324/103.R, 324/106, 324/107, 324/142, 324/263, 340/870.01, 340/870.02, 340/870.25, 307/112, 307/129, 307/125, 379/106.03, 702/61, 702/62
• US Class Current: 324/126
• CPC Class Codes: G01R 15/142 Arrangements for simultaneous measurements of several parameters employing techniques covered by groups G01R15/14 - G01R15/26
• CPC Class Codes: G01R 21/1331 Measuring real or reactive component, measuring apparent energy

Abstract

A method for remotely monitoring the magnitude and direction of net electrical power and current flow to or from a facility over a prolonged period of time. The method includes detecting and measuring the magnetic field emanating from the monitored line(s), and detecting a signal synchronized to the power system frequency, typically the electric field, emanating from the power lines. The method further includes evaluating, storing, and transmitting the data on the electromagnetic (EM) fields that are recorded.

Claims

1. A method for measuring electrical power dynamics of a facility, comprising:

placing at least one apparatus comprising a magnetic transducer and an electric transducer in proximity to and not connected to at least one electrical line connected to the facility;

receiving electric and magnetic fields of said at least one electrical line with said at least one apparatus;

processing said electric and magnetic fields to obtain information representative of magnitude and relative phase of said electric and magnetic fields;

transmitting said information to a central computing site;

determining said electrical power dynamics of said facility from said information at said central computing site; and

relaying data regarding said electrical power dynamics to an end-user.

2. The method of claim 1, wherein said data comprises real-time information regarding said electrical power dynamics.

3. The method of claim 1, further comprising relaying said data to a plurality of end-users.

4. The method of claim 1, wherein said determining step further comprises obtaining said information from a plurality of said apparatuses, each of said plurality of apparatuses in proximity to and not connected to different electrical lines, said determining comprising a summation of said information from each of said plurality of said apparatuses.

5. The method of claim 1, wherein said relaying step occurs via the Internet.

6. The method of claim 1, wherein said relaying step occurs via secure transmission.

7. The method of claim 1, wherein said data comprises graphical information regarding power flow respecting said facility.

8. The method of claim 1, wherein said at least one electrical line comprises a plurality of lines, and wherein said electrical power dynamics comprise net current power flow in said plurality of lines.

9. A method for remotely delivering real-time information regarding operational status of a power system, said method comprising:

converting magnetic field of current at a location remote to a plurality of electrical lines of said power system into magnetically transduced signals;

conditioning said magnetically transduced signals into conditioned magnetically transduced signals;

conditioning a reference signal for each of said conditioned magnetically transduced signals into conditioned reference signals;

measuring magnitude of each of said conditioned magnetically transduced signals;

measuring a phase angle between respective said conditioned magnetically transduced signals and said conditioned reference signals;

transmitting said magnitudes and said phase angles to a central facility;

determining said real-time information from said magnitudes and said phase angles, at said central facility;

relaying said real-time information to an end user.

10. The method of claim 9, further comprising using state estimation to predict power flow in at least a portion of said power system not monitored.

11. A method for providing information relating to current in an electrical line to a remote end user, comprising:

placing an apparatus comprising a magnetic transducer in proximity of and not connected to said electrical line;

receiving magnetic field emanating from said electrical line with said magnetic transducer;

receiving an electrical signal synchronized to power system frequency with said apparatus;

processing said magnetic field and said electrical signal to determine said information relating to said current in the line; and

transmitting said information to said remote end user.

12. The method of claim 11, wherein said information comprises net current power flow in said electrical line.

13. The method of claim 11, further comprising transmitting said information to a plurality of said remote end users, said remote end users comprising power market participants.

14. The method of claim 11, wherein said information comprises graphical information regarding power and current flow in said electrical line.

15. The method of claim 11, wherein said information comprises historical information regarding operational status of said electrical line.