Analysis of Grounding Grid Impulse Characteristics in Frequency Domain in Consideration of Soil Non-linear Characteristic
Tao Yuan · Proceedings of the CSEE · 2009
Considering the non-linear characteristics of soil, an effective method based on the idea of field-circuit combination was proposed in this paper for analyzing the impulse characteristics of the grounding grid in frequency domain, in which the equivalent radius was deduced. In this method there were fewer unknown variables, less calculation time required and with more reasonable models than other methods, with the consideration of both efficiency and precision involved. Meanwhile, the simulation impulse experiments were carried out on a real small grounding system. The calculation results obtained by this paper were compared with the results using CDEGS and the experimental data, which confirms the validity of the presented method.