改进CEEMD对变压器局部放电信号去噪的影响研究  

Research on the Impact of Improved CEEMD on Denoising Transformer Partial Discharge Signals

作　　者：程荣森 赵鹏泽 CHENG Rongsen;ZHAO Pengze(Xinyang Agriculture and Forestry University,Xinyang Henan 464000,China)

机构地区：[1]信阳农林学院,河南信阳464000

出　　处：《信息与电脑》2024年第18期60-62,共3页Information & Computer

摘　　要：针对变压器局部放电信号检测中存在的复杂噪声干扰问题,本研究提出了一种基于完全集合经验模态分解与信号熵和自适应小波阈值增强(CEEMDSE-AWTE)的去噪方法,并通过仿真和实测验证了算法性能。结果表明,与传统方法相比,该方法在信噪比提升方面提高了约2d B,相关系数保持在0.95以上,具有更好的噪声抑制能力和信号特征保持能力。在220k V变压器现场应用中,该方法表现出良好的稳定性和实用性,为变压器状态监测提供了可靠的技术支持。Aiming at the complex noise interference problem in transformer partial discharge signal detection,this study proposes a denoising method based on complete ensemble empirical modal decomposition with signal entropy and adaptive wavelet threshold enhancement(CEEMDSE-AWTE)and verifies the algorithmic performance through simulation and real measurements.The results show that compared with traditional methods,this method improves the signal-to-noise ratio by about 2 dB,maintains a correlation coefficient above 0.95,and has better noise suppression and signal feature preservation capabilities.In the on-site application of 220 kV transformers,this method has shown good stability and practicality,providing reliable technical support for transformer condition monitoring.

关 键 词：局部放电信号 变压器 自适应小波阈值 

分 类 号：TM855[电气工程—高电压与绝缘技术]