Sensor, method and system of monitoring transmission lines
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United States of America Patent
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Oct 2, 2012
Grant Date -
Nov 19, 2009
app pub date -
Mar 3, 2009
filing date -
Sep 8, 2006
priority date (Note) -
In Force
status (Latency Note)
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Abstract
An apparatus, method, and system for measuring the magnetic field produced by phase conductors in multi-phase power lines. The magnetic field measurements are used to determine the current load on the conductors. The magnetic fields are sensed by coils placed sufficiently proximate the lines to measure the voltage induced in the coils by the field without touching the lines. The x and y components of the magnetic fields are used to calculate the conductor sag, and then the sag data, along with the field strength data, can be used to calculate the current load on the line and the phase of the current. The sag calculations of this invention are independent of line voltage and line current measurements. The system applies a computerized fitter routine to measured and sampled voltages on the coils to accurately determine the values of parameters associated with the overhead phase conductors.
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