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电网技术  2013 

典型特高压杆塔基础接地计算与分析

, PP. 679-685

Keywords: 特高压,杆塔基础,接地电阻,电流密度

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Abstract:

为研究人工水平接地体对特高压杆塔基础接地电阻及散流的影响,在CDEGS软件中建立了典型特高压杆塔基础及人工水平接地体仿真计算模型,分别对不同根数水平接地体、不同水平接地体长度、不同土壤电阻率的降阻率及散流比进行仿真计算。计算结果表明水平接地体对特高压杆塔基础接地电阻减小效果并不十分明显,特高压杆塔接地应充分利用其自然接地体作用。另对3种典型特高压杆塔基础接地体电流密度分布进行计算,计算结果表明,单桩垂直型接地体有最大电流密度。当入地电流为10A时,非底段的最大电流密度为1.156A/m。

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