The insulation of high voltage power cables is aged due to the impact of water treeing. The voids created due to water treeing can be filled with the injection of nanofluids and restore the insulation of cables. In this work, cross-linked polyethylene (XLPE) cable insulation is restored with the help of tetraethyl orthosilicate (TEOS) rejuvenation nanofluid. The morphological changes in aged and rejuvenated samples are analyzed with the help of scanning electron microscopy (SEM). Moreover, the molecular changes in the aged and rejuvenated samples are detected using Fourier transform infrared (FTIR) spectroscopy. Both the samples are also tested with the help of electrical breakdown tests. The results indicate a positive recovery in the insulation of cables with the injection of TEOS nanofluid. The tanδ results showed a decrease in values after the injection of nanofluid in the aged sample. Moreover, the tanδ values of rejuvenated samples are even better than the unaged cables. SEM results also showed a recovery in the voids of the aged sample due to the injection of nanofluid. FTIR results confirmed that the nanofluid penetrated in the insulation of the cable and the peaks of silicone and alumina bonds are seen in the spectrographs.

高压电力电缆的绝缘由于水树的影响而老化。由于水树形成的空隙可以通过注入纳米流体来填充并恢复电缆的绝缘。在这项工作中，在原硅酸四乙酯 (TEOS) 再生纳米流体的帮助下，交联聚乙烯 (XLPE) 电缆绝缘层得以恢复。借助扫描电子显微镜 (SEM) 分析老化和复原样品的形态变化。此外，使用傅里叶变换红外 (FTIR) 光谱检测老化和复原样品中的分子变化。两个样品也都在电击穿测试的帮助下进行了测试。结果表明，通过注入 TEOS 纳米流体，电缆绝缘得到了积极的恢复。黄褐色δ结果表明，在老化样品中注入纳米流体后，数值会下降。此外，再生样品的 tan δ值甚至优于未老化电缆。SEM 结果还表明，由于注入了纳米流体，老化样品的空隙有所恢复。FTIR 结果证实纳米流体渗透到电缆的绝缘层中，并且在光谱图中可以看到硅和氧化铝键的峰。