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220kV同塔双回线路雷电反击多相同跳研究

DOI: 10.16188/j.isa.1003-8337.2015.04.022, PP. 109-116

Keywords: 同塔双回,雷电反击,多相同跳,ATP-EMTP

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Abstract:

220kV线路是当前省网主干网架,雷击跳闸是220kV线路跳闸的主要原因。以四川电网220kV同塔双回沫竹一二线雷电反击四相同跳故障为分析对象,基于电磁暂态软件ATP-EMTP,对同塔双回线路反击多相同跳机理及特性进行研究。研究表明:在一定的杆塔结构下,杆塔接地电阻和雷击时刻导线电压初始值对多相反击耐雷水平影响显著;在接地电阻较低时,应采用非平衡绝缘加强上相绝缘水平,接地电阻较大时,应采用各相平衡绝缘;多相绝缘子两端电压相近的时刻发生雷击同跳几率较大。

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