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Geomagnetic disturbances caused by increasingly frequent solar activity can induce geomagnetically induced currents (GICs) in power systems. Excessive GICs may adversely affect power grid operations. This study focuses on the evaluation of GICs during geomagnetic storms and proposes a two-stage computational model. In the first stage, the induced geoelectric field is calculated using geomagnetic disturbance data. In the second stage, the nodal admittance matrix is formulated for the regional grid configuration and system parameters using the nodal admittance method, while the GICs at each system node are calculated based on the induced geoelectric field. Finally, the validity and accuracy of the proposed GIC calculation model are verified using the GIC-Benchmark case study.

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Calculation and Analysis of Geomagnetically Induced Currents Based on Typical Grid Structures

  • 会议论文

  • 发表日期：

    2026年

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  • Li Li,
  • Linglong Cai,
  • Yuan Wang,
  • Zhiqin Ma,
  • Pengjiang Xu,
  • Xiangfu Du,
  • Yihan Tian,
  • Yanan Wang

摘要

Geomagnetic disturbances caused by increasingly frequent solar activity can induce geomagnetically induced currents (GICs) in power systems. Excessive GICs may adversely affect power grid operations. This study focuses on the evaluation of GICs during geomagnetic storms and proposes a two-stage computational model. In the first stage, the induced geoelectric field is calculated using geomagnetic disturbance data. In the second stage, the nodal admittance matrix is formulated for the regional grid configuration and system parameters using the nodal admittance method, while the GICs at each system node are calculated based on the induced geoelectric field. Finally, the validity and accuracy of the proposed GIC calculation model are verified using the GIC-Benchmark case study.