关键词:
局部放电
射频信号
放电量
高电压技术
摘要:
The aim of this paper is to calculate accurately the grounding performance of an unbounded grounding system under high-magnitude fault *** this work,a finite element model is presented to compute the characteristic parameters of the grounding system in frequency *** ionization phenomenon in the soil surrounding the grounding electrode is taken into account by setting the resistivity of every soil element while the resistivity of each element is varying with the electric field intensity;not a priori hypothesis on the geometrical shape of the ionized region around the electrodes has to be *** boundaries of the grounding system are represented by introducing a spatial transformation formulation,which translates the semi-infinite space into the finite space without shortening the domain as in the traditional *** suggested modeling is validated by comparison of the calculated results,which are laid out for grounding rod and grounding grid,with experimental and simulation results found in literature.