摘要
电树枝化是影响交联聚乙烯(XLPE)电力电缆运行安全与寿命的技术瓶颈。笔者采用金属针缺陷模拟电缆中集中的电场应力,研究了在工频交流电压下(50 Hz),不同实验起始升压速度(0.1 kV/s,1 kV/s)对XLPE电缆中电树枝生长特性的影响。结果表明,在高的升压速度下电树枝起始快,同时电树枝形态会由纯枝状变为稠密枝状,分形维变大。
Electrical treeing bottlenecks the operation reliability and service life of cross-linked polyethylene （XLPE） power cables. This paper adopts metal needle defects to model a region of electrical stress in XLPE cables, and investigates the effects of different boosting rates （0.1 kV/s, 1 kV/s） on electrical tree growth characteristics of the XLPE cables under the power frequency （50 Hz）. The result indicates that the inception of electrical tree is faster under higher boosting rate, and the structure of the electrical tree changes from branch morphology to dense branch morphology with increasing fractal dimension.
出处
《高压电器》
CAS
CSCD
北大核心
2009年第1期81-83,共3页
High Voltage Apparatus
