Inhibition of Electrical Tree Initiation inside High-Voltage Cross-Linked Polyethylene Cable with Nonlinear Shielding Layer

摘要：

　　Electrical tree aging is one of the leading factors causing degradation and breakdown of insulation performance of high-voltage cross-linked polyethylene (XLPE) cable.A lot of attention has been paid to inhibiting electric tree initiation and propagation inside high-voltage cable.In this study, insulation composites with nonlinear electrical conductivity are prepared.Experimental results show that these composites are helpful for enhancing the apparent breakdown electric field strength of XLPE in the pole electrode system.A kind of high-voltage XLPE insulated cable with new structure is designed by using these composites as nonlinear shielding layer.Numerical simulation results indicate that nonlinear shielding layer can obviously improve the distribution of electrical field at the defect of insulation surface of high-voltage XLPE cable, and decrease the maximum electrical field strength at the defect.This new structure is potential for effectively inhibiting electrical tree initiation inside high-voltage XLPE insulation cable, thus increasing life span and operational reliability of the cable.

关键词： High-voltage cable Cross-linked polyethylene Nonlinear insulation material Electrical tree

作者: Chang-ming Li Guang-xiang Zhang Chunyang Li Bao-zhong Han

作者单位: Key Laboratory of Engineering Dielectrics and Its Application, Ministry of Education, Harbin Univers Deyang Products Quality Supervision & Inspection Instiute, Deyang, 618000, China Key Laboratory of Engineering Dielectrics and Its Application, Ministry of Education, Harbin Univers

会议类型: 国际会议

会议名称: The Eighth China National Conference on Functional Materials and Applications(第八届中国功能材料及其应用学术会议)

会议地点: 哈尔滨

会议语种:英文

页码: 406-410

在线出版日期: 2013-08-23（万方平台首次上网日期，不代表论文的发表时间）