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Combined with Fast Fourier Transform (FFT), a mathematical hybrid method for accurately computing the lightning current flowing along the grounding grid buried in multilayered earth model has been developed in this paper. In the hybrid method, electrical circuits consist with “T” typical elementary element. To accelerate the calculation, both dynamic state and quasi-static complex image methods, and...
A novel mathematical model for accurately computing the lightning currents flowing in the grounding system of a high voltage a.c. substation, buried in multilayered earth, has been developed in this paper. Together with the fast Fourier transform (FFT), the conducting effect of harmonic wave components of these currents and the capacitive and inductive effects from the interface between different...
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