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Study on the Spatiotemporal Characteristics of GICs in Shandong Peninsula, China under the Geomagnetic Storm of February 27, 2023.

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Title: Study on the Spatiotemporal Characteristics of GICs in Shandong Peninsula, China under the Geomagnetic Storm of February 27, 2023.
Authors: Zhou, Xiaofeng1, Zhang, Xinwei2, Li, Xiaolong3, Cao, Jia3, Li, Tao3, Wang, Yanling3 wangyanling@sdu.edu.cn
Source: Progress in Electromagnetics Research C. 2025, Vol. 162, p19-25. 7p.
Subjects: Magnetic storms, Earth currents, Electric power distribution grids, Risk assessment, Earth resistance (Geophysics), Spatiotemporal processes, Peninsulas
Geographic Terms: China, Shandong Peninsula (China), Shandong Sheng (China)
Abstract: For assessing Geomagnetically Induced Currents (GICs) risks in mid-latitude coastal power grids, this study developes a three-dimensional Earth conductivity model that incorporates coastal effects. The model was constructed using geological cross-sectional data from the China Earthquake Administration and measured terrestrial conductivity data. Focusing on the strong geomagnetic storm of February 27, 2023, the spatiotemporal characteristics of GICs in Shandong Peninsula across 34 substations and 46 transmission lines were accurately computed. The GICs peak of the substation appears at Muping, and GICs peak of the transmission line appears at Zouxian-Luzhou Line. Notably, two coastal substations exceeded the safety limit for GICs. Areas of highest risk are concentrated in the southeastern coastal region of Shandong, underscoring the significant impact of coastal effects and changes in geological structure. This method and its findings provide a global reference for predicting and issuing early warnings regarding GICs in long-distance mid-latitude coastal power grids. [ABSTRACT FROM AUTHOR]
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Database: Engineering Source
Description
Abstract:For assessing Geomagnetically Induced Currents (GICs) risks in mid-latitude coastal power grids, this study developes a three-dimensional Earth conductivity model that incorporates coastal effects. The model was constructed using geological cross-sectional data from the China Earthquake Administration and measured terrestrial conductivity data. Focusing on the strong geomagnetic storm of February 27, 2023, the spatiotemporal characteristics of GICs in Shandong Peninsula across 34 substations and 46 transmission lines were accurately computed. The GICs peak of the substation appears at Muping, and GICs peak of the transmission line appears at Zouxian-Luzhou Line. Notably, two coastal substations exceeded the safety limit for GICs. Areas of highest risk are concentrated in the southeastern coastal region of Shandong, underscoring the significant impact of coastal effects and changes in geological structure. This method and its findings provide a global reference for predicting and issuing early warnings regarding GICs in long-distance mid-latitude coastal power grids. [ABSTRACT FROM AUTHOR]
ISSN:19378718
DOI:10.2528/PIERC25090901