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Sensor, method and system of monitoring transmission lines

一种传感器、磁场传感器的技术，应用在高分辨率传感器领域

Inactive Publication Date: 2009-09-09
GENSCAPE INTANGIBLE HOLDING INC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The method requires neither the accurate measurement of the conductor temperature nor the electric field

Method used

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  • Sensor, method and system of monitoring transmission lines
  • Sensor, method and system of monitoring transmission lines
  • Sensor, method and system of monitoring transmission lines

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Embodiment Construction

[0030] HV overhead phase conductors are very long and the gentle catenary, electromagnetic characteristics and behavior of carefully studied HV overhead phase conductors are very clear 1 . A quasi-linear phase conductor generates a time-varying magnetic field at 60 Hz that can be processed quasi-statically. The field strength at any location can be measured very accurately and can be used to accurately determine the distance from a conductor if measurements are made at several spatially different locations simultaneously. This distance can in turn be used to determine the sag of the conductor; from this, the average conductor temperature, current phase angle and magnitude of the current can be accurately determined.

[0031] The magnitude of the magnetic field H around the phase conductor is H=I / 2πr, where r is the distance from the conductor and I is the phase current. In a three-phase transmission circuit, the phase current I 1 , I 2 and I 3 120 degrees out of phase and...

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Abstract

The invention provides 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.

Description

[0001] Cross References to Prior Applications [0002] This application claims the benefit of co-pending US Provisional Patent Application No. 60 / 825,093, filed September 8, 2006, which is hereby incorporated by reference in its entirety. [0003] About federally funded research and development [0004] This invention was made with United States Government support under Contract No. DE-FG02-05ER84159 awarded by the United States Department of Energy. The government has certain rights in this invention. technical field [0005] The present invention relates to a reliable, low cost, non-contact, non-intrusive, high accuracy, high resolution sensor for simultaneously monitoring high voltage transmission conductor sag, temperature, maximum current carrying capacity (or "ampacity"), and phase current. Given this data, the system can estimate available transmission capacity ("ATC") and dynamically rate circuits. The system of the present invention works well even with a minimal n...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01R15/14G01R19/25G01R29/08
CPCG01R15/18G01R15/142G01R19/2513
Inventor S·J·西拉卡斯R·克拉克P·G·哈尔弗森F·M·特斯克C·V·巴洛
Owner GENSCAPE INTANGIBLE HOLDING INC
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