交联聚乙烯电缆绝缘老化试验及其检测技术

Progress in Insulation Ageing Test and Detecting Technology of XLPE Cable

为了更好地研究交联聚乙烯(XLPE)电缆的绝缘老化特性,需在实验室条件下对其进行老化试验,本文总结了目前对XLPE电缆的绝缘老化试验及其检测技术的研究进展。首先对交联聚乙烯电缆的常见老化类型和现象进行了介绍,阐述了目前对于水树老化和电树老化生长机理及影响因素方面的研究成果;其次介绍了在实验室条件下对XLPE电缆进行加速老化试验的方法和该试验对电缆的影响;然后对目前电缆绝缘老化的检测方法进行了简要分类,介绍了各种方法的原理、适用条件和优缺点以及各个阶段绝缘检测的特点和适用方法;此外,总结了目前对于水树老化和电树老化的抑制方法和原理;最后对电缆绝缘老化相关问题进行了探讨,展望了未来研究的发展方向。

In order to research the insulation ageing characteristics of cross-linked polyethylene(XLPE)cables,it is necessary to perform ageing tests under laboratory conditions.In this paper,the current research progress on insulation ageing tests and detection techniques of XLPE cables was reviewed.Firstly,the common ageing types and phenomena of XLPE cables were introduced,and the current research results on the growth mechanism and influencing factors of water tree ageing and electrical tree ageing were elaborated.Secondly,the accelerated ageing test methods for XLPE cables under laboratory conditions and their effect on cables were introduced.Then,the current detection methods of cable insulation ageing were briefly classified,the principle,applicable conditions,and advantages and disadvantages of each methods and the characteristics and application method of each insulation detection stage were introduced.Finally,the problems related to cable insulation ageing and their future research directions were discussed.