Abstract：Theaccurate calculation of grounding device parameters and current flow mechanismin complex soil structure is the foundation of reasonable optimization design of the hydropower station grounding device. A finite element calculation method of grounding device considering large scale complex soil structure is published in this paper. In this modeling,two dimensionalfinite element is coupling with three dimensional finite element to overcome the large computation induced by large contrast between extensive soil domain and grounding conductor. Vertical three layer soil model, massive soil model, and drop soil model were established respectively based on the presented method; current density, electric field strength in soil are analyzed in detail. The influence of soil resistivity of the riverside and the depth of river on ground resistanceofhydropowerstation grounding device is analyzedquantitatively.The results show that the water depth is the important factor influencing the current flow process of grounding device, design of hydropower stationgrounding device in complex soil structureshould considerthe actual water depth of massive soil modeland drop soil model.
李景丽, 张宇, 郭丽莹, 李渊博. 复杂土壤结构对水电站接地装置散流机理影响分析[J]. 电工技术学报, 2017, 32(23): 167-175.
Li Jingli, Zhang Yu, GuoLiying, Li Yuanbo. Analysis the Effect of Complex Soil Structure on the Dispersion Mechanism of the Grounding Device in the Hydropower Station. Transactions of China Electrotechnical Society, 2017, 32(23): 167-175.
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2017, Vol. 32 
