摘要局部放电既是电气设备绝缘劣化的征兆,又是造成绝缘劣化的关键性因素。因此,局部放电检测可以有效发现其潜伏性放电故障,从而提高供电系统的安全性和可靠性。本研究以经过热老化处理后带有缺陷的10 k V交联聚乙烯高压电缆为试样,进行针电极实验,并通过超高频局部放电检测系统,采集电缆发出的局部放电信号,得到不同缺陷类型的电缆样品中电树枝发展、绝缘老化与局部放电的关系。
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