电容型绝缘结构的老化问题

The Ageing of Some Capacitive Type Insulation Structures

本文主要介绍电容型绝缘结构在运行中发现的各种电、热及氧化老化现象,以及通过对十几支具有严重绝缘缺陷的电流互感器与电容型套管的绝缘诊断、解剖分析,提出了造成上述绝缘老化的各种原因与防止对策。

This paper discusses the ageing problems of some capacitive type insulation structures such as electrical thermal and oxidation ageing phenomenon under long duration operating voltage. According to insulation diagnosis and dissections over more than ten current transformers and condenser type bushings with serious insulation defects, it is shown that electric、thermal and oxidation ageings are the main ageing forms of this kind of insulation structure and they are mutual effected with each other. The reasons for these ageings and the examination of insulation defects have been expiored