高压电器2025，Vol.61Issue(11)：221-230,10.DOI:10.13296/j.1001-1609.hva.2025.11.021
基于奇异值能量标准谱和改进TVF-EMD的换流变压器局部放电去噪方法
Partial Discharge Denoising Method for Converter Transformer Based on Singular Value Energy Standard Spectrum and Improved TVF-EMD
摘要
Abstract
In view of the problem that partial discharge(PD)signals of UHV converter transformer are susceptible to periodic narrow-band interference and Gaussian white noise and affect detection accuracy,in this paper a hybrid de-noising method for PD signal based on singular value energy standard spectrum andtime-varying filtering-based em-pirical mode decomposition(TVF-EMD)is proposed.First,the original noisy PD signal is processed by using singu-lar value decomposition,and the singular value energy standard spectrum is introduced to determine the reconstruc-tion order and remove the narrow-band interference.Then,the PD signal with white noise as the primary interference is decomposed by using TVF-EMD and the kurtosis criterion is used to choose effective intrinsic mode function(IMF).Finally,the effective IMFs with residual noise are smoothed and reconstructed by nonlocalmeans(NLM).The de-noised PD signal after the reconstruction is obtained.The experiment of PD signal of±1100 kV UHV converter trans-former,which is obtained by simulation and real measurement,is performed.The result shows that the method can be able to suppress the complex noise of the PD signal effectively,and the evaluation indexes of the results are superior to other comparison algorithms.关键词
换流变压器/局部放电去噪/奇异值能量标准谱/时变滤波经验模态分解/峭度准则/非局部均值Key words
converter transformer/partial discharge denoising/singular value energy standard spectrum/time varying filtering-based empirical mode decomposition/kurtosis criterion/nonlocal means引用本文复制引用
李腾,樊培培,廖军,蒋欣峰,卢一相..基于奇异值能量标准谱和改进TVF-EMD的换流变压器局部放电去噪方法[J].高压电器,2025,61(11):221-230,10.基金项目
国网安徽省电力有限公司科技项目(52120322000D). Project Supported by Science and Technology Project of State Grid Anhui Electric Power Co.,Ltd.(52120322000D). （52120322000D）
