Calculation and Analysis of Geo-Magnetically Induced Current in Earth Based on Plane Wave Method

Abstract:

Geo-magnetically Induced Current (GIC) is not only flowing in conductors such as power grid and pipeline, but also flowing in earth and GIC in earth will affect GIC in conductors. Thus studying the relationship between GIC in earth and earth conductivity is significant to understand the impacts of conductivity on GIC in earth and conductors. This paper uses Maxwell equations and plane wave method to analyze GIC density lever and distribution characteristics in different earth depth of uniform/layered earth conductivity model and gives the relationship between conductivity and GIC in earth. The results indicate that, the smaller the earth conductivity, the deeper earth GIC distributes, and earth conductivity structure has great impact on GIC. At last, this paper proposes that to calculate GIC in power grid accurately, we need to establish more accurate earth conductivity models.

• Periodical: Advanced Materials Research (Volumes 732-733)
• Pages: 1197-1201
• DOI: https://doi.org/10.4028/www.scientific.net/AMR.732-733.1197
• Online since: August 2013
• Authors: Xiao Wang, Lian Guang Liu, Chun Ming Liu
• Keywords: Earth Conductivity, Earth Geo-Magnetically Induced Current, Magnetic Storm, Power Grid

References

[1] R. Pirjola. Geomagnetically Induced Currents During Magnetic Storms. Plasma Science, IEEE Transactions on, vol. 28, 6, pp.1867-1873, (2000).

DOI: 10.1109/27.902215

[2] Ari Viljanen. Relation of geomagnetically induced currents and local geomagnetic variations. IEEE Transactions on Power Delivery, vol. 13, 4, pp.1285-1290, (1998).

DOI: 10.1109/61.714497

[3] R. Pirjola. On currents induced in Power transmission systems during geomagnetic variations. IEEE Transactions on Power Apparatus and Systems, PAS-104: 2825- 2831, (1985).

DOI: 10.1109/tpas.1985.319126

[4] D.H. Boteler, R. Pirjola. Modeling geomagnetically induced currents produced by realistic and uniform electric fields. IEEE Transactions on Power Delivery, vol. 13, 4, pp.1303-1308, (1998).

DOI: 10.1109/61.714500

[5] D.H. Boteler, R. Pirjola. The complex-image method for calculating the magnetic and electric fields produced at the surface of the earth by the auroral electrojet. Geophys, vol. 132, 1, pp.31-40, (1998).

DOI: 10.1046/j.1365-246x.1998.00388.x

[6] A. Viljanen, A. Pulkkinen, O. Amm, R. Pirjola, T. Korja, and BEAR Working Group. Fast computation of the geoelectric field using the method of elementary current systems and planar Earth models. Annales Geophysicae, vol. 22, 1, pp.101-113, (2004).

DOI: 10.5194/angeo-22-101-2004

[7] W. Y. Xu, Physics of electromagnetic phenomena of the earth. Anhui, China: China Science and Technology Press, (2009).

[8] X. S. W: Seismology and Geology, in Chinese, vol. 23, 4, pp.581-587, (2001).

[9] C. M. Liu: Mid-low latitude power grid geomagnetically induced current in power grid. North China Electric Power University, in Chinese, (2009).

[10] D.H. Boteler. Calculating the voltages induced in technological systems during a geomagnetic disturbance. IEEE Transactions on electromagnetic compatibility, vol. 41, 4, pp.398-402, (1999).

DOI: 10.1109/15.809834

[11] Y. Cao: Earth resistivity modeling method for the evaluation of geomagnetically induced current in power grid. North China Electric Power Unversity, in Chinese, (2009).