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Journal of the Korean Institute of Illuminating and Electrical Installation Engineers

ISO Journal TitleJ Korean Inst. IIIum. Electr. Install. Eng.
Title Frequency Response Characteristics of a Grounding Grid
Authors Jong-Hyuk ChoiJong-Hyuk Choi ; Bok-Hee LeeBok-Hee Lee
DOI http://dx.doi.org/10.5207/JIEIE.2016.30.5.066
Page pp.66-73
ISSN 1225-1135
Keywords Grounding Impedance ; Dissipation Current ; Grounding Grid ; Frequency-Dependent Grounding Impedance ; Non-Uniform Distributed Parameter Circuit Model
Abstract The dissipation current distribution, potential rises and frequency-dependent impedances of the grounding grid were investigated. The computational simulations are made using the simplified EMTP-based model. Based on experimental and simulation results, the dissipation current at a frequency above ~100kHz intensively converged near the current injection point of the grounding grid, and decreased far from the current injection point. When the test current was injected at the center of the grounding grid, the high frequency grounding impedances were lower than those measured at the corner or side of the grounding grid. The trend of simulation results for the grounding impedance and dissipation current distribution calculated using a non-uniform distributed parameter circuit model are similar to the data measured at the test site.