CAJ | 학술논문

针对变压器油色谱在线监测系统在现场使用中存在的色谱基线不稳定、扣除不完全等问题，提出了基于小波包分析的色谱信号预处理。该方法通过小波包对信号进行多分辨率分解，扣除部分干扰高、低频信号，得到所需要的色谱信号。实验结果表明：将小波包应用到色谱信号数据预处理中，相对于传统小波变换能更细致地进行信号分析，较好地进行色谱基线的扣除，减少基线对色谱信号的干扰，从而有效提高油色谱在线监测系统的分析精度和模型稳定性。
침대변압기유색보재선감측계통재현장사용중존재적색보기선불은정、구제불완전등문제，제출료기우소파포분석적색보신호예처리。해방법통과소파포대신호진행다분변솔분해，구제부분간우고、저빈신호，득도소수요적색보신호。실험결과표명：장소파포응용도색보신호수거예처리중，상대우전통소파변환능경세치지진행신호분석，교호지진행색보기선적구제，감소기선대색보신호적간우，종이유효제고유색보재선감측계통적분석정도화모형은정성。
Considering instability and incomplete deduction of the chromatographic baseline of transformer oil on-line monitoring system,a wavelet packet analysis-based baseline chromatographic signal reprocessing meth-od was proposed,which having wavelet packet used to implement multi-resolution decomposition and to deduct both low and high-frequency disturbance signals so as to obtain a chromatographic signal needed.The experi-mental results show that compared to the traditional wavelet transform,the wavelet packet analysis can do bet-ter in signal processing,reducing baseline interference and improving analysis precision and model stability.