Lightning Grounding Grid Model Considering Both the Frequency-Dependent Behavior and Ionization Phenomenon

A grounding grid is essential to the lightning protection of power systems. This paper presents a modified partial element equivalent circuit method for predicting the transient behavior of the grounding grid. The frequency-dependent parameters of the grounding grid are obtained first by using the i...

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Bibliographic Details
Published inIEEE transactions on electromagnetic compatibility Vol. 61; no. 1; pp. 157 - 165
Main Authors Chen, Hongcai, Du, Yaping
Format Journal Article
LanguageEnglish
Published New York IEEE 01.02.2019
The Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subjects
Computer simulation
Electrical grounding
Electrodes
Equivalent circuit
Equivalent circuits
Grounding
grounding grid
Impedance
Integrated circuit modeling
Ionization
Lightning
Lightning protection
lightning tra-nsient
partial element equivalent circuit (PEEC)
Radio equipment
Resistance
Soil
soil ionization
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Summary:A grounding grid is essential to the lightning protection of power systems. This paper presents a modified partial element equivalent circuit method for predicting the transient behavior of the grounding grid. The frequency-dependent parameters of the grounding grid are obtained first by using the image method. Both modified nodal formulation and vector fitting techniques are applied to derive an extended equivalent network for time-domain simulation. In this method, the soil ionization effect is considered using a nonlinear resistance. The proposed method is verified with experimental results available in the literature. Finally, lightning transients in the grounding grid of a radio base station is presented. The ionization and propagation effects on grounding grid performance are discussed.
ISSN:0018-9375
1558-187X
DOI:10.1109/TEMC.2017.2789210