Minimum Amplitude of Geomagnetic Disturbance in Electrical Power System Leading to 500kV transformer DC Bias

Wei Li Wu

doi:10.4028/www.scientific.net/AMR.676.251

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HomeAdvanced Materials ResearchAdvanced Materials Research Vol. 676Minimum Amplitude of Geomagnetic Disturbance in...

Minimum Amplitude of Geomagnetic Disturbance in Electrical Power System Leading to 500kV transformer DC Bias

Abstract:

This article analysis the relationship between geomagentically induced currents(GIC) in electrical power system flowing through 500kV transformer neutral point in Ling’Ao power grid and the geomagnetic data observed at Guangzhou geomagnetic observatory during 2004/11 -2006/12. It is found that correlation coefficient between GIC and magnetic field component variation may be greater than that of time derivative of the geomagnetic field, which are all less than -0.5. According to the relation, The minimum amplitude of geomagnetic component variation is 7.08(nT/min) in term of transformer of single or three phase five columns while is about27.47(nT/min) when the type is three phase three columns.

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Periodical:

Advanced Materials Research (Volume 676)

Pages:

251-254

DOI:

https://doi.org/10.4028/www.scientific.net/AMR.676.251

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Online since:

March 2013

Authors:

Wei Li Wu

Keywords:

Correlation Analysis, DC Bias, GIC, Variant Rate of Horizontal Geomagnetic Field

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