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CLC number: O441.5

On-line Access: 2011-03-09

Received: 2009-12-20

Revision Accepted: 2010-04-12

Crosschecked: 2010-12-06

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Journal of Zhejiang University SCIENCE C 2011 Vol.12 No.3 P.250-262


Calculating the transient behavior of grounding systems using inverse Laplace transform

Author(s):  Nabiollah Ramezani, Seyed Mohammad Shahrtash

Affiliation(s):  Behshahr Branch, Iran University of Science and Technology, Behshahr 47137, Iran, Center of Excellence for Power Systems Automation and Operation, Department of Electrical Engineering, Iran University of Science and Technology, Tehran 16844, Iran

Corresponding email(s):   n_ramezani@iust.ac.ir, shahrtash@iust.ac.ir

Key Words:  Electromagnetic field, Near-field computation, High frequency performance, Soil ionization, Grounding system, Fast inverse Laplace transform

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Nabiollah Ramezani, Seyed Mohammad Shahrtash. Calculating the transient behavior of grounding systems using inverse Laplace transform[J]. Journal of Zhejiang University Science C, 2011, 12(3): 250-262.

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T1 - Calculating the transient behavior of grounding systems using inverse Laplace transform
A1 - Nabiollah Ramezani
A1 - Seyed Mohammad Shahrtash
J0 - Journal of Zhejiang University Science C
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DOI - 10.1631/jzus.C0910777

This paper deals with a unified and novel approach for analyzing the frequency and time domain performance of grounding systems. The proposed procedure is based on solving the full set of Maxwell’s equations in the frequency domain, and enables the exact computation of very near fields at the surface of the grounding grid, as well as far fields, by simple and accurate closed-form expressions for solving Sommerfeld integrals. In addition, the soil ionization is easily considered in the proposed method. The frequency domain responses are converted to the time domain by fast inverse Laplace transform. The results are validated and have shown acceptable accuracy.

Darkslateblue:Affiliate; Royal Blue:Author; Turquoise:Article


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