Liu Jiefeng, Fan Xianhao, Zhang Yiyi, Zheng Hanbo, Yao Huilu, Zhang Chaohai, Zhang Yubo, Li Dajian
College of Electrical Engineering, Guangxi University, Nanning 530004, China.
School of Physical and Technology, Guangxi University, Nanning 530004, China.
Polymers (Basel). 2019 Jul 2;11(7):1126. doi: 10.3390/polym11071126.
It is a fact that the frequency domain spectroscopy (FDS) curve at different temperatures can be corrected by the shift factor () extracted from the master curve. However, the and master curve reported by previous works are distinctive due to the difference in the construction algorithm. Therefore, it is of great significance to report a universal approach for extracting . In this work, the unaged oil-immersed pressboards with different moisture content () are firstly prepared and selected as the research specimen. Then, the of FDS curves on the above pressboard is extracted based upon the master curve technique. The influence mechanism under the various test temperature () and is therefore analyzed so as to establish a universal model for predicting the . The present findings reveal that the value extracted from FDS curves is both temperature-dependent and moisture-dependent. In addition, the predicted is not only suitable for temperature correction on FDS curve of same type pressboard with different insulation conditions (moisture contents and aging degrees), but also maintains considerable accuracy when applied to different types of pressboard. Therefore, the obtained conclusions will provide a universal method for temperature correction on FDS curve of transformer polymer insulation.
不同温度下的频域光谱（FDS）曲线可通过从主曲线中提取的位移因子（）进行校正，这是一个事实。然而，由于构建算法的差异，先前工作报道的和主曲线有所不同。因此，报告一种提取的通用方法具有重要意义。在这项工作中，首先制备并选择了具有不同含水量（）的未老化油浸纸板作为研究样本。然后，基于主曲线技术提取上述纸板上FDS曲线的。因此，分析了各种测试温度（）和下的影响机制，以建立一个预测的通用模型。目前的研究结果表明，从FDS曲线中提取的值既与温度有关，也与水分有关。此外，预测的不仅适用于对具有不同绝缘条件（含水量和老化程度）的同类型纸板的FDS曲线进行温度校正，而且在应用于不同类型的纸板时也保持相当高的准确性。因此，所得结论将为变压器聚合物绝缘FDS曲线的温度校正提供一种通用方法。
