摘要
介绍了在江苏省电力公司江东门110 kV变电站内采集运行中GIS设备的振动信号,对振动信号降噪处理,运用了希尔伯特-黄变换(HHT)对降噪后的振动信号进行分析。比较信号的希尔伯特谱,得到各频率分量幅值随时间变化的情况;比较信号的边际谱,得到GIS设备的故障特征量。实测数据研究表明,HHT方法能有效地对GIS设备进行特征提取及故障诊断。
The vibration signals of the running GIS equipment in 110-kV Jiangdong Gate Substation are collected and denoised. Then the denoised signals are analyzed by virtue of the Hilben-Huang transformation （HHT）. By comparing the Hilbert-Huang spectrum, the amplitude fluctuation of each frequency component with time can be obtained ; while by comparing the HHT marginal spectrum, the fauh features of the GIS equipment can be retrieved. The study results show that the HHT method is very effective in analysing vibration signals and diagnosing failures for GIS equipment.
出处
《中国电力》
CSCD
北大核心
2013年第3期39-42,共4页
Electric Power
关键词
GIS
振动信号
HHT
经验模态分解
希尔伯特变换
gas insulated switchgear （GIS）
vibration signal
HHT
empirical mode decomposition
Hilbert transformation
