【摘要】 提出了一种同时考虑感性耦合和阻性耦合时的地下导体电磁屏蔽的计算模型 ,利用该模型进行了地下金属管道对其内通信电缆和屏蔽线对其附近通信电缆的电磁屏蔽计算。计算结果表明 ,仅从感性耦合的屏蔽效果考虑 ,则金属管道和屏蔽线对地下通信电缆屏蔽保护效果基本相同 ;从阻性耦合影响和对防雷影响的屏蔽效果考虑 ,则套装金属管道的效果要优于敷设屏蔽线更多还原

【Abstract】 An electromagnetic shielding calculation model of underground conductors is presented, which takes the inductive coupling and the resistive coupling into account simultaneously. Based on the model, the electromagnetic shielding effectiveness of the buried pipeline to its internal communication cables and the metallic mitigation line to its nearby communication cables is calculated. The calculation results shows that only considering by shielding inductive coupling, electromagnetic shielding effectiveness of the pipeline and the mitigation line is similar on the whole; considering by shielding resistive coupling and lightning stroke, the shielding effectiveness of pipeline is better than the mitigation line.更多还原