ABSTRACT

In this paper, the distribution of the electric field of medium voltage (MV) underground cable insulation made of polyethylene/copper nanoparticles (XLPE/Cu) is investigated. Three methods were established for copper nanoparticles (CuNPs) synthesis such as the alkaline reduction process, electrolysis process and metal displacement reaction. Ultraviolet–visible spectra, X-ray diffraction, and transmission electron microscopy (TEM) were used to classify the obtained CuNPs. The XLPE/Cu films with different CuNP weight content (0%, 1%, 3% and 5%) were subjected to a 3 MeV electron beam (EB) with different doses (0, 15, 20 and 25 kGy). The optimum AC/DC conductivity (AC 2 × 10⁻³ S ^m−1, DC 4.63 × 10⁻² S m⁻¹) in minimum relative permittivity (2.05) achieved for (XLPE/5-Cu) 25 kGy that is has a CuNP content of 5 wt-% and irradiated at 25 kGy. The electric field distribution in the middle of the (XLPE/5-Cu) 25 kGy sample is maximum uniform than at the top or bottom.

摘要

本文研究了由聚乙烯/铜纳米粒子 (XLPE/Cu) 制成的中压 (MV) 地下电缆绝缘层的电场分布。建立了三种铜纳米粒子（CuNPs）的合成方法，如碱还原法、电解法和金属置换反应。紫外-可见光谱、X 射线衍射和透射电子显微镜 (TEM) 用于对获得的 CuNPs 进行分类。具有不同 CuNP 重量含量（0%、1%、3% 和 5%）的 XLPE/Cu 薄膜经受不同剂量（0、15、20 和 25 kGy）的 3 MeV 电子束（EB）。最佳 AC/DC 电导率 (AC 2 × 10 ^-3 S  ^m-1 , DC 4.63 × 10 ^-2  S m ^-1) 在 (XLPE/5-Cu) 25 kGy 下实现的最小相对介电常数 (2.05)，其中 CuNP 含量为 5 wt-% 并以 25 kGy 辐照。(XLPE/5-Cu) 25 kGy 样品中间的电场分布比顶部或底部最均匀。