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发明公开
CN109100009A 基于经验模态分解EMD的分接开关振动信号降噪方法 无效 - 撤回

基于经验模态分解EMD的分接开关振动信号降噪方法
摘要：
本发明公开了一种基于EMD的分接开关振动信号降噪方法，包括以下步骤：1)通过加速度传感器对有载分接开关(OLTC)正常状态下的振动信号、故障状态下的振动信号进行采集；2)采用经验模态分解(EMD)算法对采集的振动信号进行分解，得到IMF分量；3)对EMD分解得到的前几个IMF分量采用基于EMD阈值降噪的方法进行降噪处理，而对于其余的IMF分量则采用Savitzky-Golay滤波器进行降噪。实验数据表明：本发明对分接开关振动信号降噪可以取得较好的降噪效果。
摘要（英）：

The invention discloses a tap changer vibration signal noise reduction method based on EMD. The method comprises the steps of: 1) collecting vibration signals in normal state and vibration signals infault state of an on-load tap changer (OLTC) through an acceleration sensor; 2) decomposing the collected vibration signals using the Empirical Mode Decomposition (EMD) algorithm to obtain IMF components; and 3) performing noise reduction process on the first few IMF components obtained by the EMD decomposition using a method based on EMD threshold noise reduction and performing noise reduction process on the remaining IMF components using Savitzky-Golay filter. According to the tap changer vibration signal noise reduction method, experimental data reveal that according to the tap changer vibration signal noise reduction method, a better noise reduction effect to the vibration signal of the tap changer can be achieved.

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