摘要
利用有限元方法通过分析水电站大坝的电流场,得到大坝的接地电阻.该方法对土壤结构和内部地网的铺设情况没有限制,可以分析任意结构接地装置的接地电阻.通过电流场的有限元分析,给出了大坝的电位分布,电场强度分布和电流密度分布.最后根据接地点的电位和电流计算了大坝的接地电阻.该电阻值为高土壤电阻率地区水电站的接地电阻计算提供了参考.
The electric current fields of hydropower station dam are analyzed by using finite element method; and the dam＇s grounding resistance is obtained. This method has no restriction on soil structure and grounding paving; therefore it can analyze grounding resistance of arbitrary structure grounding set. By using FEM to analyze dam＇s electric current field, the dam＇s voltage distribution, electric field intensity distribution, and electric current density distribution are given. Finally, according to the voltage and electric current of grounding place, the dam＇s grounding resistance is calculated. This grounding resistance is a reference for grounding resistance calculation for hydropower stations where the soils have high resistivity.
出处
《三峡大学学报（自然科学版）》
CAS
2009年第4期49-51,共3页
Journal of China Three Gorges University：Natural Sciences
关键词
电流场
有限元法
地网
接地电阻
electric current field
finite element method
ground grid
grounding resistance
