High-frequency Performance of Ground Rods in Highly Resistive Soil
نویسنده
چکیده
Some of the design requirements for power transmission line grounding in highly resistive soil to reduce lightning flashback rate are often contradictory, such as: low values of both low-frequency ground resistance and high-frequency (HF) ground impedance. Former requires larger dimensions of the grounding electrodes that lead to higher values of their HF impedance due to inductive effects. Paper investigates dominant parameters that govern HF behavior of long ground rods in highly resistive soil, and proposes arrangements of grounding electrodes for better HF performance. Comparison between field measurements and rigorous and simplified theoretical results is also presented.
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