中国电机工程学报2011，Vol.31Issue(34)：184-191,8.
高频电压下交联聚乙烯中电树枝的形态特性
Electrical Tree Structure Characteristics in XLPE Power Cable Insulation Under High-frequency Voltages
鲍明晖 1尹小根 1何俊佳1
作者信息
- 1. 华中科技大学电气与电子工程学院,湖北省武汉市430074
- 折叠
摘要
Abstract
In order to investigate the electrical tree structure characteristics in cross-linked polyethylene（XLPE） under high-frequency voltages,the tree growing processes under various voltages,frequencies and pin-plane spacings were observed with a photomicrographic platform.The influences of local electric field and frequency on tree structures were analyzed and the corresponding influencing mechanisms were discussed.In addition,a new parameter,the energy threshold,was introduced to investigate the relations of growth rate and fractal dimension with tree structure characteristics.It has been found that the local electric field and frequency regularly affect tree structures.Bush-like trees only form under higher voltages;and the electric field in a very small zone near the needle tip is an important influencing factor for the formation of bush-like trees.Pure vine-like trees form only under high frequencies,which increase with the rise of voltages.For double-structure trees,the local electric field at the transition location almost stays constant under different voltages and pin-plane spacings,but obviously increases with the increase of frequency.关键词
电树枝/电缆绝缘/交联聚乙烯/高频电压/局部电场强度Key words
electrical tree/cable insulation/cross-linked polyethylene（XLPE）/high-frequency voltage/local electric field分类
信息技术与安全科学引用本文复制引用
鲍明晖,尹小根,何俊佳..高频电压下交联聚乙烯中电树枝的形态特性[J].中国电机工程学报,2011,31(34):184-191,8.
