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高压电器  2015 

EEMD能量熵在配电变压器绕组状态监测中的应用

DOI: 10.13296/j.1001-1609.hva.2015.11.031, PP. 187-193

Keywords: 变压器绕组,振动,总体平均经验模态分解(EEMD),能量熵,状态监测

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Abstract:

利用振动法在线监测配电变压器绕组的状态关键在于如何从振动信号中提取有效的特征。为了更有效地监测与诊断变压器绕组的状态,搭建了某配电变压器多次短路冲击试验及负载试验时的振动信号监测平台,利用总体平均经验模态分解(ensembleempiricalmodedecomposition,EEMD)对变压器绕组的振动信号进行分析并求解其能量熵值,提出一种基于EEMD能量熵的配电变压器绕组状态监测与故障诊断的方法。实验结果表明,EEMD能够有效地提取配电变压器绕组振动信号的特征,得到振动信号各频带内的能量分布状态,可准确地在线监测与诊断配电变压器绕组故障。

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