Analysis on Impulse Grounding Resistance Characteristics of Transmission Line Tower Grounding Electrode
Lin Mei Yang · Insulators and Surge Arresters · 2012
In order to study the impulse characteristics of transmission line tower grounding electrodes under lightning currents,the impulse characteristics of grounding electrodes under impulse currents are simulated by CDEGS software.The impulse characteristics of the single horizontal grounding electrode and four improved grounding electrodes are analyzed,the influence law of different grounding electrode size and different soil resistivity on impulse grounding resistance is discussed.The influence law of grounding electrode length and radius on impulse grounding resistance of horizontal grounding electrode is obtained,the impulse grounding resistance decrease with the increase of the grounding electrode length,but tend to be a constant value;and the impulse grounding resistance characteristics of vertical grounding electrodes on four improved grounding electrodes are also obtained,a reference is provided for using proper method to decrease the impulse grounding resistance in practical project application.