针对电缆附件用硅橡胶材料的电树枝生长特性及其局部放电特性进行研究,总结了电树枝的不同生长阶段具有的放电特性.结果表明:电树枝的典型生长模式主要包括生长-滞长模式和生长-快速生长-击穿模式,前者多存在于丛状电树枝中,后者多存在于松枝状和树枝状电树枝中.电树枝生长过程包括起始期、生长期、滞长期和击穿期等.不同生长阶段具有不同的局部放电特性,为电力电缆在线监测提供了有利的理论依据.
The electrical tree growth and partial discharge characteristics of silicone rubber for cable acces-sories were studied, and the PD characteristics under different electrical tree growth stages were summa-rized. The results show that the typical growth pattern of electrical tree mainly contains growth-retarda-tion pattern and growth-breakdown pattern, and the former mostly presents in bush-like trees, while the latter mostly presents in pine-like and branch-like trees. The electrical tree growing process includes tree initiation stage, tree growing stage, growing retardation stage, and breakdown stage. Different electrical tree growth stages have different PD characteristics, which provide helpful information to the power cable on-line monitoring.
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