Impulse characteristics of model grounding electrodes for a transmission tower-footing base structure

초록

The analysis of dynamic behavior of the transmission tower-footing base structure subjected to lightning currents is very important for the insulation design of transmission lines. We conducted a model experiment to propose a technique to investigate the dynamic characteristics of the ground resistance and the impulse response characteristics of the transmission tower-footing structure when soil ionization occurs due to the high surge current injected into the grounding electrode. The impulse characteristics of the ground resistance were measured and analyzed by using a hemispherical grounding electrode and a scale-down model grounding electrode of the transmission tower-footing base structure. Based on the model experiment using a scaling rule, we propose a method to estimate the impulse response of the actual transmission tower-footing structure. © 2019 IEEE.

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