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Sensor, Method and System of Monitoring Transmission Lines

  • US 20090284249A1
  • Filed: 03/03/2009
  • Published: 11/19/2009
  • Est. Priority Date: 09/08/2006
  • Status: Active Grant
First Claim
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1. A computerized system for determining the physical location of phase conductors in addition to the magnitude, phase, or frequency of the currents on the phase conductors, the system comprising:

  • an apparatus for measuring the three dimensional phase and magnitude of the magnetic field emanating from the phase conductors, said apparatus comprising at least one orthogonally-oriented pair of magnetic field sensors for positioning remotely from a phase conductor, said sensors comprising at least a pair of coaxial conductive windings having opposite polarity from a common center ground, said opposite polarity windings substantially canceling the electric field signal on said windings and generating an open circuit voltage between the respective ends of each winding;

    a multi-channel analog to digital converter for sampling the induced open circuit voltage;

    a data processing module implemented on a computer for processing the digital signals from the analog to digital converter, said digital signals representing the real time voltage signal outputs of said sensors, said data processing module comprising;

    at least one digital band pass filter for isolating at least the fundamental frequency of each voltage signal;

    a phase determination module for identifying the phase of each said voltage signal from each said sensor;

    an amplitude determination module for identifying the amplitude of each said voltage signal from each of said sensors.

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