摘要
针对深井接地板设计过程中通常将实际的水平多层土壤结构视为均匀土壤或简化为两层水平分层结构导致设计值与测量值相差较大的问题,提出了基于数值分析的多层水平分层结构下的深井接地极接地阻值计算模型。并结合桌220 kV变电站运用深井爆破法降阻的案例,通过数值分析的方法获取变电站的土壤分层结构后运用上述模型进行了计算。最后通过仿真验证了深井接地极分层计算模型的准确性,并分析出深井爆破法降阻效果与井深以及下层土壤电阻率的关系。
For the problem of large difference between the calculated value and measured value in deep earth electrode design process, typically seen the actual level of the multilayer soil structure as homogeneous soil and two-level hierarchical structure, and proposed deep grounding resistance calculation model based on numerical analysis under multi-level hierarchy. Combined with a case of deep blast method resistance reduction in a 220 kV substation, soil hierarchy substation is obtained through numerical analysis method and the above model is used for calculating. Finally, the accuracy of deep grounding hierarchical model is verified by simulating, the relationship between deep blasting reduction in resistance and depth as well as the underlying soil resistivity is analyzed.
出处
《电瓷避雷器》
CAS
北大核心
2017年第1期91-95,共5页
Insulators and Surge Arresters
关键词
数值分析
土壤分层结构
计算模型
深井爆破法
仿真验证
numerical analysis
soil hierarchy
calculation model
deep blasting method
simulation
