110 kV高压电缆户外终端发热典型缺陷分析

A Typical Thermal Defect of 110 kV High Voltage Cable Outdoor Terminal

摘要: 电缆附件是电力电缆线路中非常重要的一部分，若电缆附件安装质量不良，在长时间运行过程中的老化、震动等因素会导致安装缺陷进一步发展，最终导致严重缺陷的产生甚至击穿。本文基于一起110 kV高压电缆线路户外终端发热典型缺陷，结合现场处理情况及电缆运行经验，分析出电缆终端发热缺陷为电缆附件安装过程封铅工艺不合格导致。并从终端表面处理、打底、焊接、质量检查等方面给出了避免和处理此类缺陷的建议，希望对电力电缆运维检修人员提供一定的指导参考。

Abstract: Cable accessory is a very important part of high voltage power cable lines. According to statistics, over 90 percent cable defects occurred because of cable accessory problems which are mainly caused by poor installation process. If the installation quality is unqualified, the defects may not accurate in the preliminary test or the early operation stage. But affected by the aging and vibration during long time operation, installation defects will further deteriorate until breakdown. In this paper, we analysed a typical thermal defect of 110 kV high voltage cable outdoor terminal, studied the reason that caused such defect and gave some advices for other power cable engineers to avoid the same problems in the future.