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高压电器  2015 

交流和振荡波电压下XLPE电缆典型缺陷局部放电特性研究

DOI: DOI:10.13296/j.1001-1609.hva.2015.08.007, PP. 43-48

Keywords: 交流,振荡波电压,电场分析,典型缺陷,局部放电,放电特征

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Abstract:

局部放电诊断技术被广泛应用在电力电缆绝缘状态的监测之中。为了深入了解电缆的局部放电特性,文中通过仿真实验设计并制作出内部气隙放电、针板放电、沿面放电、悬浮放电4种典型缺陷模型,在交流和振荡波电压下分别对这4种模型的局部放电进行测量,对比分析不同缺陷的局部放电起始电压、熄灭电压、放电波形、频谱图、局放模式等特征参量。各种缺陷的局部放电统计特征具有较为明显的差异,为进一步研究电力电缆局部放电模式识别和绝缘老化特征提供了参考。

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