Parameters Extraction and Mechanism Analysis of the Moisture in Oil–Paper Based on the Spectral Decomposition of Dielectric Response
Parameters Extraction and Mechanism Analysis of the Moisture in Oil–Paper Based on the Spectral Decomposition of Dielectric Response
复制标题
基于介电响应谱分解的油纸水分参数提取及机理分析
DOI：
10.1109/tdei.2022.3179252
复制
发表时间：
2022
影响因子：
3.1
通讯作者：
Yadong Xing
中科院分区：
文献类型：
--
作者：
Yizhuo Hu;M. Dong;B. Song;Changjie Xia;Jiacheng Xie;Yang Liu;Yadong Xing
频域介电谱法（FDS）广泛应用于油浸式电力设备的绝缘评定中，通过数学近似可以对绝缘纸中的水分进行定性预测。然而，由于其潜在机制仍有许多未被探索，迄今为止，仍然没有令人信服的物理诊断方法。借助光谱分解方法，探讨水分对独立介电响应谱的影响及其机理。首先，通过实部曲线的推导，对实测的介质响应曲线进行展开和重构。其次，提取受潮样品的独立极化和电导光谱，定量建立绝缘纸含水率与光谱参数之间的关系；结果表明：室温下，水分在中频区引入了一种新的极化现象，极化现象和电导都随着含水量的增加而增加；采用多重吸附模型和水分质子交换模型分别描述了极化谱和电导谱的变化。本研究为油纸绝缘材料的水分评价提供了方法上的参考。
Frequency-domain dielectric spectroscopy (FDS) is widely used in the insulation assessment of oil-immersed power equipment, and the moisture in insulating paper could be qualitatively predicted by mathematical approximation. However, due to the still lots unexplored underlying mechanisms, until now, there is still no convincing and physical method for the diagnosis of moisture content. With the aid of spectral decomposition methods, this article aims to explore the effects and mechanism of moisture on the independent dielectric response spectra. First, the measured dielectric response curve is unfolded and reconstructed by derivation of the real part curve. Second, the independent polarization and conductance spectra of damp samples are extracted, and then, the relationships between moisture content in insulating paper and spectral parameters are established quantitatively. The results show that moisture introduces a new polarization in the midfrequency region at room temperature, and both polarization and conductance increase with the moisture content. The multiple adsorption model and the proton exchange model of moisture are employed to illustrate the changes of the polarization and the conductance spectra, respectively. This research provides a methodological reference for the moisture assessment of oil–paper insulation.