IEEJ Transactions on Fundamentals and Materials
Online ISSN : 1347-5533
Print ISSN : 0385-4205
ISSN-L : 0385-4205
Special Issue Paper
A Long-period Observation of Neutral Current at an Extra-high Voltage Transformer in Chubu Region
Jun IzutsuSatoru NagataTadayuki WadaMasahito ShimizuKenji Ohta
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2011 Volume 131 Issue 9 Pages 678-683


We have observed and recorded the neutral current of a 500 kV transformer at a substation in Chubu region since 2008 in order to detect electromagnetic anomalies associated with earthquakes. In this observation, we could not find any particular anomalous change of the neutral current before and after earthquakes (e.g. The Suruga Bay Earthquake occurred on August 11, 2009).
However, from the result of a quantitative analysis between geomagnetic field data and neutral current data, we would be able to investigate the underground electric conductivities near the substations. It would be possible to monitor the change of electromagnetic structure of underground before and after earthquakes.

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© 2011 by the Institute of Electrical Engineers of Japan
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