摘要
由于当前方法去噪结果和检测结果均不理想,提出一种基于VMD算法的500 k V换流变压器套管引线检测方法。通过VMD对含噪信号进行分解,利用相关系数计算筛选出固有模态函数中的高频分量进行小波阈值去噪,保留高频分量中的回波信息,将其进行和低频IMF进行信号重构。同时采用逆向云发生器计算不同信号的特征熵,结合频域特征—中心频率作为特征参数进行500 kV换流变压器套管引线检测。仿真实验结果表明,所提方法能够有效过滤信号中的噪声,同时获取高精度的检测结果。
Because the denoising results and detection results of the current method are not ideal,a method for detecting the bushing leads of a 500 kV converter transformer based on the VMD algorithm is proposed.It decomposes the noisy signal through VMD,uses correlation coefficient calculation to filter out the high-frequency components in the intrinsic modal function for wavelet threshold denoising,retains the echo information in the high-frequency components,and reconstructs the signal with the low-frequency IMF.At the same time,the inverse cloud generator is used to calculate the characteristic entropy of different signals,and the frequency domain characteristic-center frequency is used as the characteristic parameter to detect the lead wire of the 500kV converter transformer bushing.The simulation experiment results show that the proposed method can effectively filter the noise in the signal and obtain high-precision detection results.
作者
吕刚
孙勇
卢世才
邓军
唐华东
LV Gang;SUN Yong;LU Shi-cai;DENG Jun;TANG Hua-dong(Guiyang Bureau of UHV Transmission Company,China Southern Power Grid Co.,Ltd.,Guiyang 550000 China)
出处
《自动化技术与应用》
2023年第4期71-73,91,共4页
Techniques of Automation and Applications
基金
南方电网贵阳局超高压输电公司资助(CSPGKJ2010001)。