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运用ATP-EMTP研究地电位干扰防护措施效果

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Keywords: 接地网,暂态电位分布,ATP-EMTP,电阻率,网格大小

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Abstract:

针对变电所遭受雷击时接地网中地电位分布不均的问题,运用ATP-EMTP软件仿真分析地网上雷电暂态电位分布情况。根据实际接地网搭建的接地体的数学模型,增加垂直接地体对于接地网的设计和铺设上能解决地电位均衡问题,改善冲击电位分布,改善工频大电流入地时的地电位分布,防止局部电位升高。通过改变土壤电阻率和接地网孔大小,分析地电位的变化规律,总结两种防护措施的情况,为改进地电位防护措施提供一定参考。

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