Simple Geomagnetic Induced Current Detection and Monitoring in Power Transformers

This paper presents a detection system of geomagnetic induced currents based on the measurement of the magnetic field outside the magnetic core; it is possible to evaluate the core operating conditions of power transformers under the effect of geomagnetic induced currents. The nonlinear behavior of...

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Bibliographic Details
Published in:Measurement and control (London) 2016-09, Vol.49 (7), p.230-233
Main Authors: Ramírez, José, Rodríguez–Rodríguez, Joaquín H, Mijarez, Rito
Format: Article
Language:English
Subjects:
Asymmetry
Evaluation
Geomagnetism
Magnetic cores
Magnetic fields
Magnetism
Saturation
Transformers
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Summary:This paper presents a detection system of geomagnetic induced currents based on the measurement of the magnetic field outside the magnetic core; it is possible to evaluate the core operating conditions of power transformers under the effect of geomagnetic induced currents. The nonlinear behavior of the core due to asymmetric saturation produces a distortion in the external magnetic field which can be evaluated by the measurement of the magnitude of even harmonics; we describe the experimental setup and the instrumentation required for real-time detection of asymmetric saturation caused by quasi-DC magnetic fields. The experimental results obtained by simulating the presence of geomagnetic induced currents are presented.
ISSN:0020-2940
2051-8730
DOI:10.1177/0020294016663973