Frequency domain and time domain analysis of the transient behavior of buried grounding grids in horizontal multilayered earth model

This study proposes a mathematical model based on the PI basic functions that uses the mutual impedance matrix between the average potential on the discrete node and the leakage current on the conductor connected around the grounding grid. By considering the effect of ionization of soil, the model c...

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Bibliographic Details
Published in:Electrical engineering 2022-08, Vol.104 (4), p.2515-2529
Main Authors: Li, Zhong-Xin, Chen, Wei-Jiang, Wang, Ke-Chao
Format: Article
Language:English
Subjects:
Conductors
Earth models
Economics and Management
Electrical Engineering
Electrical grounding
Electrical Machines and Networks
Energy Policy
Engineering
Green's functions
Impedance matrix
Leakage current
Lightning
Mathematical analysis
Mathematical models
Mutual impedance
Original Paper
Power Electronics
Soil improvement
Soils
Time domain analysis
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Summary:This study proposes a mathematical model based on the PI basic functions that uses the mutual impedance matrix between the average potential on the discrete node and the leakage current on the conductor connected around the grounding grid. By considering the effect of ionization of soil, the model can accurately calculate the distribution of lightning current and lightning response to the grounding grid buried in the horizontal multilayered soil model. To improve computational efficiency, the quasi-static complex image method and the closed form of Green’s function in the time domain are introduced to the model. Finally, certain numerical results are discussed in detail and important conclusions are derived.
ISSN:0948-7921
1432-0487
DOI:10.1007/s00202-022-01502-x