谢敏;周凯;赵世林;何珉;张福忠;

• 1:四川大学电气信息学院

摘要(Abstract)：

为解决传统时域反射法(time domain reflectometry,TDR)和宽频阻抗谱法(broadband impedance spectroscopy,BIS)对电缆微弱局部缺陷进行定位时存在的问题,提出一种新型基于反射系数谱的电力电缆局部缺陷精确定位方法。首先结合电缆分布参数模型及精细频谱分析、Kaiser窗、距离窗处理技术详细阐明了反射系数谱定位方法的基本原理;然后对不同损伤程度的电缆缺陷进行建模定位仿真,检验该方法的可行性与识别灵敏度;最后在实验室65.5 m长的10 kV交联聚乙烯(cross-linked polyethylene,XLPE)电力电缆上制作了微弱局部缺陷对该方法的准确性进行了验证。仿真和实验结果表明:该方法能对不同损伤程度的某些局部缺陷进行有效定位,即使电缆损伤程度较弱时,该方法也具有较高的识别灵敏度和识别精度,定位误差<0.6%。与传统TDR相比,该方法对微弱缺陷的识别能力更强;与BIS法相比,该方法所需测试频率更低,所需测试点数更少。

关键词(KeyWords)： 微弱缺陷;反射系数谱;精细频谱分析;Kaiser窗;距离窗

Abstract:

Keywords:

基金项目(Foundation): 中国博士后科学基金项目(2015T80976)~~

作者(Author): 谢敏;周凯;赵世林;何珉;张福忠;

Email:

DOI: 10.13335/j.1000-3673.pst.2016.2859

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