Volume 33 Issue 6
Nov.  2013
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Wu Weili, Liu Lianguang. Calculation Method for Geoelectric Field in Mid- and Low-latitude Area Based on Sparse Geomagnetic Data[J]. Chinese Journal of Space Science, 2013, 33(6): 617-623. doi: 10.11728/cjss2013.06.617
Citation: Wu Weili, Liu Lianguang. Calculation Method for Geoelectric Field in Mid- and Low-latitude Area Based on Sparse Geomagnetic Data[J]. Chinese Journal of Space Science, 2013, 33(6): 617-623. doi: 10.11728/cjss2013.06.617

Calculation Method for Geoelectric Field in Mid- and Low-latitude Area Based on Sparse Geomagnetic Data

doi: 10.11728/cjss2013.06.617
  • Received Date: 2012-10-30
  • Rev Recd Date: 2013-04-27
  • Publish Date: 2013-11-15
  • Mastering spatial and temporal distribution of geoelectric field is the premise of researching and preventing adverse effect on technology systems due to geomagnetic induced current. This paper presents a model for geoelectric field on the basis of sparse geomagnetic observation data in China. Firstly, the model of equal Spherical Elementary Currents System (SECS) is used to represent ionospheric current. Then, the hybrid algorithm of SECS and Complex Image Method (CIM) is proposed to calculate the geoelectric field and the magnetic field due to geomagnetic disturbance. The method provided can be used to calculate the fields at any time, any place during magnetic storms. To test and validate the approach put forward, the observation geomagnetic data at Umq, KSH, GRM and JYG were applied, the induced fields in northwest area were calculated, and the errors between the measurement and calculation were analyzed as well. The results of geoelectric field are consistent with that of the plane wave method, which verifies the algorithm proposed. The results can be directly used to calculate the geomagnetically induced currents flowing in power system, which is of great significance in the hazards assessment of power systems.

     

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