An Adaptive Chebyshev Approach for Fast Computation of Grounding System Admittance Matrix

The paper proposes an adaptive Chebyshev method for expediting the calculation of grounding system admittance matrix. This facilitates the characterization and the inclusion of the wideband model of the grounding systems into the time-domain electromagnetic transient solvers. In the proposed method,...

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Bibliographic Details
Published in:IEEE transactions on electromagnetic compatibility 2017-04, Vol.59 (2), p.420-428
Main Authors: Mashayekhi, Valiollah, Sadeghi, Seyed Hossein Hesamedin, Moini, Rouzbeh, Sheshyekani, Keyhan
Format: Article
Language:English
Subjects:
Adaptive systems
Admittance
Broadband
Chebyshev approximation
Chebyshev functions
Computer simulation
Conductors
Electrical equipment
Electrical impedance
Grounding
Impedance
Lightning
Mathematical model
Maxwell's equations
Method of moments
Solvers
state space methods
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Summary:The paper proposes an adaptive Chebyshev method for expediting the calculation of grounding system admittance matrix. This facilitates the characterization and the inclusion of the wideband model of the grounding systems into the time-domain electromagnetic transient solvers. In the proposed method, a general electromagnetic approach based on the method of moments (MoM) solution to Maxwell's equations is utilized to obtain the grounding system admittance matrix over the frequency range of interest. Rather than applying the MoM to each distinct frequency obtained from the FFT procedure, the proposed method is utilized to reduce the number of frequency points for which the response of grounding system is calculated. Several simulated case studies are presented to examine the accuracy of the proposed method. It is shown that the selected sampling frequencies are sufficient to generate the exact response of the grounding system over the working frequency interval.
ISSN:0018-9375
1558-187X
DOI:10.1109/TEMC.2016.2611675