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振荡波电压下10kV交联聚乙烯电缆中间接头的局部放电特性

DOI: 10.13336/j.1003-6520.hve.2015.04.002, PP. 1068-1074

Keywords: XLPE电缆,中间接头缺陷模型,局部放电,振荡波电压,工频电压,3维统计图谱

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Abstract:

交联聚乙烯(XLPE)电缆局部放电的振荡波电压检测方法是一种无损检测方法,目前已得到初步应用。为了研究振荡波电压下电缆典型缺陷的局部放电特性,制作了4种10kV交联聚乙烯电缆中间接头人工缺陷模型,对4种缺陷模型分别施加振荡波电压和工频电压,对比研究了振荡波电压和工频电压下的局部放电特性。研究结果表明相较于工频电压,振荡波电压下局部放电的脉冲信号上升沿更陡峭,过峰值后衰减更快,在2~3个周期内衰减到0,脉冲持续时间短约3~30μs;同一种缺陷的局部放电3维统计图谱在振荡波电压与工频电压下基本一致,不同缺陷的局部放电3维统计图谱区别明显,为进一步研究振荡波电压作用下交联聚乙烯电缆局部放电的模式识别奠定了基础。

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