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高压电器  2015 

基于增强火花效应的集中接地装置冲击降阻试验研究

DOI: 10.13296/j.1001-1609.hva.2015.07.031, PP. 160-165

Keywords: 集中接地装置,散流,冲击接地模拟试验,冲击接地阻抗,火花效应

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Abstract:

降低接地装置冲击接地阻抗是提高输电线路的防雷水平的有效措施,而降低冲击接地阻抗的关键是提高集中接地装置的冲击散流效率。文中在接地装置冲击特性理论与仿真的研究基础上,从增强火花效应以提高散流效率的角度,在典型集中接地装置上添加适当的出线端头,并对其冲击降阻效果进行模拟试验研究。试验结果表明,通过在集中接地装置的合适位置增加出线端头,增强了局部火花效应,可以起到了降低冲击阻抗的作用;同时冲击降阻效果受出线端头长度与布置的影响,相比于水平方向,当出线端头为垂直地面方向时,其降阻效果更为明显。

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