物理学报Issue(14)：150-157,8.DOI:10.7498/aps.62.144102
土壤模型对地表电位影响及合理选取土壤模型方法研究*
The effect of soil model on earth surface potential and reasonable selection method for soil model∗
摘要
Abstract
The Green’s function of three-dimensional combined-layer soil model is firstly derived using simulated image method. Based on the specified soil model, the influence of soil model on the earth surface potential (ESP) is analyzed for different soil structure configurations. It is found that difference in soil model only changes the absolute value of ESP, but the influence of ESP difference can be ignored under certain conditions. And the physical mechanism for the effect of soil parameter change on ESP is explained theoretically. One of the challenges that have not been solved effectively is how to establish the proper soil model to calculate DC current flowing through the neutral point of transformer accurately. For this challenge, the criteria and threshold value for selecting the soil model reasonably are introduced. Therefore, the arbitrariness and blindness of selecting the soil model can be avoided. The results are useful for calculating accurate results, which can further provide theoretical references for selecting substations near the HVDC ground electrode.关键词
格林函数/模拟镜像法/直流偏磁/土壤模型Key words
Green’s function/simulated image method/DC bias/soil model引用本文复制引用
..土壤模型对地表电位影响及合理选取土壤模型方法研究*[J].物理学报,2013,(14):150-157,8.基金项目
国家自然科学基金(批准号:51077095)资助的课题.*Project supported by the National Natural Science Foundation of China (Grant No.51077095) （批准号:51077095）
