摘要
用时域有限差分(FDTD)法对接地体冲击接地阻抗进行了时域分析。计算了脉冲泄流时不同接地体的冲击接地阻抗(TGR),并分析了接地体自身形状及电磁参数对TGR的影响。通过分析得到如下结论:在接地体上下表面埋深相同,表面积相同,但接地体形状不同时,TGR基本相同;体积相同,表面积越大,TGR越小,但用刻槽方法使表面积增大不能减小TGR;非金属接地体电导率足够大时具有与导体一样的泄流效果;接地体磁导率变化对TGR影响很小。
In this paper, the time domain analysis of transient grounding resistance (TGR) of grounding electrode is conducted with finite-difference time-domain (FDTD) method. The TGR of various grounding electrodes under pulsed discharging current are calculated, and the influence of the variations of grounding electrode on the TGR is analyzed. Some conclusions are obtained from the analysis, which is useful in analyzing and designing of the grounding system.
出处
《电波科学学报》
EI
CSCD
北大核心
2007年第1期166-169,共4页
Chinese Journal of Radio Science
基金
国家自然科学基金资助项目(60471013和60671007)
关键词
接地
冲击接地阻抗
时域有限差分法
电磁防护
electromagnetic protection, grounding, transient grounding resistance (TGR), finite difference time domain (FDTD) method