APPARATUS AND METHOD FOR CALCULATING LENGTH OF CARBON GROUNDING ELECTRODE MODULE BASED ON TWO-LAYERED DISTRIBUTED CONSTANT CIRCUIT

摘要

The present invention relates to an apparatus and method for calculating a length of a carbon grounding electrode module, which calculates a grounding electrode module length with the smallest grounding impedance variation depending on frequency variation, with respect to the grounding electrode module having a coaxial structure and being filled therein with a carbon-containing filler, wherein the present invention comprises: configuring two distributed constant circuits into two layers to configure a grounding electrode circuit; receiving the resistivity and relative dielectric constant of ground, the resistivity and relative dielectric constant of the filler, and the inside and outside diameters of the grounding electrode module, as dummy variables; selecting a plurality of frequencies within a frequency variation range; simulating a grounding electrode circuit with the dummy variables with respect to each selected frequency to calculate grounding impedances corresponding to lengths of a grounding electrode; and obtaining the grounding electrode length that is the minimum difference between the grounding impedances of respective frequencies. Through this, a grounding electrode module is implemented in which the variation of a grounding impedance is small even during frequency variations, thereby making it possible to develop a grounding system having a stable performance even with high-frequency fault currents, such as stroke currents or the like.