CA2203747A1 - Method for long term monitoring of magnetic fields - Google Patents

Method for long term monitoring of magnetic fields

Info

Publication number
CA2203747A1
CA2203747A1 CA2203747A CA2203747A CA2203747A1 CA 2203747 A1 CA2203747 A1 CA 2203747A1 CA 2203747 A CA2203747 A CA 2203747A CA 2203747 A CA2203747 A CA 2203747A CA 2203747 A1 CA2203747 A1 CA 2203747A1
Authority
CA
Canada
Prior art keywords
power
monitoring
disclosed
methodology
field strengths
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
CA2203747A
Other languages
French (fr)
Other versions
CA2203747C (en
Inventor
Mark A. Janoska
Robert W. Mccourt
Paul S. Wong
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Public Service Electric and Gas Co
Original Assignee
Public Service Electric and Gas Co
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Public Service Electric and Gas Co filed Critical Public Service Electric and Gas Co
Publication of CA2203747A1 publication Critical patent/CA2203747A1/en
Application granted granted Critical
Publication of CA2203747C publication Critical patent/CA2203747C/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
    • G01R29/00—Arrangements for measuring or indicating electric quantities not covered by groups G01R19/00 - G01R27/00
    • G01R29/08—Measuring electromagnetic field characteristics
    • G01R29/0807—Measuring electromagnetic field characteristics characterised by the application
    • G01R29/0814—Field measurements related to measuring influence on or from apparatus, components or humans, e.g. in ESD, EMI, EMC, EMP testing, measuring radiation leakage; detecting presence of micro- or radiowave emitters; dosimetry; testing shielding; measurements related to lightning
    • G01R29/0857—Dosimetry, i.e. measuring the time integral of radiation intensity; Level warning devices for personal safety use

Abstract

There is disclosed a methodology for measuring the magnetic field strengths of fundamental and harmonic frequencies associated with a.c. electrical current flows over a protracted period of time; and, particularly , in hostile environments. A preferable application calls for the determination of the field strengths associated with electrical currents flowing in a.c. power, distribution lines of utilities. The monitoring instrument is positioned in relation to the power lines to be monitored, typically at the base of a pole immediately adjacent the pole of the power line or on a power line supporting pole itself. In order to provide for long term, powering of the monitoring device, d.c. power is developed utilizing the a.c. power that is present. The conversion from a.c. to d.c. is effected at a distance sufficiently far from the monitoring instrument so as not to have any consequence on the readings that are being taken. Readings during the protracted period are typically stored and then accessable at pre-determined periods. A procedure for checking operability of the instrument is disclosed. The methodology further includes a technique for determining the lateral profile of magnetic field strengths for transverse distances from the location site of the monitoring instrument. The methodology disclosed has broad application including workplace monitoring.
CA002203747A 1996-04-25 1997-04-25 Method for long term monitoring of magnetic fields Expired - Lifetime CA2203747C (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US08/637,497 US5717388A (en) 1996-04-25 1996-04-25 Method for long term monitoring of magnetic fields
US08/637,497 1996-04-25

Publications (2)

Publication Number Publication Date
CA2203747A1 true CA2203747A1 (en) 1997-10-25
CA2203747C CA2203747C (en) 1999-07-20

Family

ID=24556191

Family Applications (1)

Application Number Title Priority Date Filing Date
CA002203747A Expired - Lifetime CA2203747C (en) 1996-04-25 1997-04-25 Method for long term monitoring of magnetic fields

Country Status (2)

Country Link
US (1) US5717388A (en)
CA (1) CA2203747C (en)

Families Citing this family (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6313752B1 (en) * 1998-05-21 2001-11-06 Steven P. Corrigan System for displaying dynamic on-line operating conditions of an interconnected power transmission network
US6714000B2 (en) * 1999-06-14 2004-03-30 Genscape, Inc. Method for monitoring power and current flow
GB2361144B (en) * 2000-01-10 2002-04-03 Alan Campbell Group Ltd Monitoring apparatus and method
CA2406444C (en) 2000-04-13 2010-11-09 Genscape, Inc. Apparatus and method for the measurement and monitoring of electrical power generation and transmission
US6483309B1 (en) * 2000-12-11 2002-11-19 The United States Of America As Represented By The Secretary Of The Navy Power frequency magnetic field (PF-MF) detection systems and operating methods therefor
CA2618505C (en) * 2005-09-16 2014-11-25 Universite De Liege Device, system and method for real-time monitoring of overhead power lines
US20070262779A1 (en) * 2006-05-11 2007-11-15 Lucent Technologies Inc. Detection of unbalanced power feed conditions
DE102006052539A1 (en) * 2006-11-06 2008-05-15 Deutsche Bahn Ag Method for the large-area detection of strongly fluctuating low-frequency magnetic fields, in particular in the context of determining an electromagnetic compatibility in the field of current-carrying facilities

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4829298A (en) * 1983-04-13 1989-05-09 Fernandes Roosevelt A Electrical power line monitoring systems, including harmonic value measurements and relaying communications
FR2693275B1 (en) * 1992-07-06 1994-08-19 Alsthom Gec Ground measurement device for high voltage overhead lines.
US5300924A (en) * 1992-08-21 1994-04-05 Basic Measuring Instruments Harmonic measuring instrument for AC power systems with a time-based threshold means
US5434501A (en) * 1994-04-29 1995-07-18 The United States Of America As Represented By The Secretary Of The Navy Polarization insensitive current and magnetic field optic sensor
US5550476A (en) * 1994-09-29 1996-08-27 Pacific Gas And Electric Company Fault sensor device with radio transceiver
US5565783A (en) * 1994-09-29 1996-10-15 Pacific Gas And Electric Company Fault sensor device with radio transceiver

Also Published As

Publication number Publication date
CA2203747C (en) 1999-07-20
US5717388A (en) 1998-02-10

Similar Documents

Publication Publication Date Title
JP5893052B2 (en) Wire manager with current and voltage sensing
CA2203748A1 (en) Device used for long term monitoring of magnetic fields
TW367412B (en) Circuit for measuring in-circuit resistance and current
DE60129437D1 (en) SYSTEM AND METHOD FOR ESTIMATING THE ELECTRICAL EFFICIENCY ELECTRICAL DEVICE AND ABNORMALITY ALERTING SYSTEM THEREWITH
MXPA01009909A (en) Insulator support current sensor.
CA2203747A1 (en) Method for long term monitoring of magnetic fields
Palethorpe et al. Power system impedance measurement using a power electronic converter
ATE460675T1 (en) DEVICE AND METHOD FOR ELECTRICAL POWER MEASUREMENT
DE19983488T1 (en) System and method for frequency compensation in an energy measuring device
Sumner et al. Estimation of power supply harmonic impedance using a controlled voltage disturbance
ATE231975T1 (en) MEASURING METHOD FOR MEASURING THE LOOP RESISTANCE OF A POWER SUPPLY NETWORK WITH NEUTRAL CONDUCTORS
JP2000206162A (en) Method and system for measuring grounding resistance
DE59913444D1 (en) Device for measuring the capacitance of electrical wires
Terzija et al. Symmetrical components estimation through nonrecursive Newton-type numerical algorithm
Wilson et al. Verification of measured transmission system phase angles
AU766044B2 (en) Apparatus and method for fault detection on conductors
ATE330231T1 (en) METHOD FOR DETECTING RESISTIVE FAULTS
CA2396448A1 (en) Method and apparatus for determining the internal impedance of a distribution transformer and sensing dc current through an ac power meter
Tobin et al. Remote current sensing on overhead power lines
Zhengcai et al. Power frequency magnetic fields around busbar trunking risers
Sasdelli et al. A digital instrument for the calibration of current-to-voltage transducers
JPS6225828A (en) Cubicle
JPH03202763A (en) Method and apparatus for measuring ground potential of underground embedded material
Beddoes et al. Portable variable frequency instrument for use in earth impedance studies
Zaffanella et al. Research facility for the study of power system magnetic fields

Legal Events

Date Code Title Description
EEER Examination request
MKEX Expiry

Effective date: 20170425