【作者】 卢亚军；

【导师】 全玉生；

【作者基本信息】 华北电力大学（北京） ， 高电压与绝缘技术， 2010， 硕士

【摘要】 本文主要研究减少避雷线电能损耗的方法,研究双避雷线结构输电线路电磁感应电压和静电感应电压以及各种损耗分量的计算方法。采用了多导体磁链方法改进避雷线感应电流环流分量的计算,使避雷线电能损耗计算更加准确。分析了影响避雷线电能损耗大小的因素和几种减小损耗的方法,并对加入复合阻抗减小避雷线电能损耗进行了ATP仿真计算,仿真结果证明了该方法的可行性。考虑到大地的非均匀性,为准确计算高压输电线路避雷线中的电能损耗,建立了土壤水平分层模型,以两层土壤为例,基于麦克斯韦方程组推导出了电磁场等效作用宽度的计算公式,提出了考虑土壤水平分层结构时避雷线各阻抗参数的计算方法。实验测量了两层水平分层土壤结构下的接地电阻和土壤电阻率,证实了土壤分层模型的有效性和可靠性。更多还原

【Abstract】 Power loss caused by lightning protection reasons is deeply studied in this thesis, a method of calculating electromagnetic and electrostatic induced voltage as well as the components of power loss is summed up. The calculation of circulation current is improved by utilizing the theory of flux in multi-conductor lines, making power loss calculation more precisely. The influencing factors and measurements for reducing power loss in lightning shield line are analyzed, an ATP simulated calculation model is built-up to analyze the feasibility of multiple impendence, and the results indicates that this method can certainly reduce the inductive current in lightning line.Considering the heterogeneity of the soil, a multi-layer horizontal soil model is built in order to calculate the power loss accurately in lightning-shield line. Based on Maxwell’s equations, the formulas of equivalent width for the electromagnetic field are deduced, this article also puts forward a way of the calculation for impedance in the lightning-shield line when considering the two-layer horizontal soil. Finally grounding resistance and soil resistivity are measured under the condition of two-layer horizontal soil, and the model is proved to be reasonable.更多还原