CAJ | 학술논문

为解决城市电网中的电缆绝缘老化问题，本文从电缆的缆芯压力注入一种有机硅液体以延长老化后交联聚乙烯（ XLPE）电缆的寿命，对其实现方法、效果和微观结构变化进行了研究。讨论了水树的生长和修复原理，并对渗透的微观过程进行了分析。将新电缆试样进行水树加速老化形成明显的水树，通过修复液压力注入进行修复，修复后试样的阻性电流迅速下降，击穿电压提高。通过SEM （扫描电子显微镜）和XPS （ X射线能谱分析）观察电缆切片，发现了水树区的胶状填充物，其成分为Si和Ti的氧化物。对现场运行电缆进行了绝缘修复实验，修复后介质损耗正切值明显下降。通过实验和微观分析说明，该方法对老化电缆的绝缘有较明显的改善作用，水树空洞生成的填充物具有良好的填充和绝缘性。
위해결성시전망중적전람절연노화문제，본문종전람적람심압력주입일충유궤규액체이연장노화후교련취을희（ XLPE）전람적수명，대기실현방법、효과화미관결구변화진행료연구。토론료수수적생장화수복원리，병대삼투적미관과정진행료분석。장신전람시양진행수수가속노화형성명현적수수，통과수복액압력주입진행수복，수복후시양적조성전류신속하강，격천전압제고。통과SEM （소묘전자현미경）화XPS （ X사선능보분석）관찰전람절편，발현료수수구적효상전충물，기성분위Si화Ti적양화물。대현장운행전람진행료절연수복실험，수복후개질손모정절치명현하강。통과실험화미관분석설명，해방법대노화전람적절연유교명현적개선작용，수수공동생성적전충물구유량호적전충화절연성。
In order to solve problems of aging cables in an urban distribution grid, a siloxane liquid is used to cure water tree in aged XLPE cables by a pressure injecting method. By understanding the principle of water tree growth and the diffuse process of the liquid, the rejuvenation mechanism is well explained. Cable samples are aged until obvious water tree is observed in the sample. The water tree is cured by a rejuvenated liquid with a pressured sys?tem. Comparing the insulation performances of aged samples and rejuvenated samples, resistive current of the reju?venated samples decreases and breakdown voltage of the rejuvenated samples is obviously increased. Depending on analysis of SEM and XPS for the water tree region, the filling compound is observed in the water tree voids, which is mainly composed of Ti and Si element. Moreover, a rejuvenation experiment is performed on site for a cable and dielectric loss factor of the injected cable is clearly reduced. According to the results of the experiment and the mi?cro analysis, the injecting technique can greatly improve the insulation of aged cables, and the filling compound in the water tree voids have the good effect of filling and insulation.