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Application of Reassigned Cohen Class Time-frequency Distribution to the Analysis of Acoustic Emission Partial Discharge Signal for GIS
Author(s): 
Pages: 2724-2730
Year: Issue:  11
Journal: High Voltage Engineering

Keyword:  GIS局部放电声发射技术超声Cohen类时频分布重排时频变换;
Abstract: 为了完整描述气体绝缘组合开关(gas insulated switchgear,GIS)在发生局部放电时信号的时频域信息,介绍了Cohen类双线性时频分布并针对交叉干扰项影响无法完全消除的问题进行了重排时频变换以提取及分辨含有白噪声和窄带周期干扰的局部放电信号.处理仿真和现场检测到的局部放电超声信号时根据白噪声和窄带周期干扰信号在时域上的平稳性特性发现重排Cohen类时频变换方法不仅可以很好地将局...
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