摘要
为了研究不同界面压力对冷缩式电缆中间接头的交联聚乙烯/硅橡胶(XLPE/SR)绝缘复合界面电场畸变的影响,采用有限元仿真软件建立了35 kV冷缩电缆中间接头仿真模型,对复合界面无缺陷以及存在金属杂质、环向划痕、纵向划痕时的电-热-力场进行仿真计算。结果表明:界面压力对各条件下的接头变形及场强畸变存在不同程度的影响,含纵向划痕的接头变形更显著,缺陷处场强分布受界面压力的影响更明显。屏蔽管场强与界面压力成反比,含纵向划痕的接头应力锥场强与界面压力成正比,绝缘复合界面除缺陷部位外整体场强随界面压力增大而减小。
In order to study the influence of different interface pressure on the electric field distortion of the composite interface of crosslinked polyethylene/silicon rubber(XLPE/SR)insulation in the cold shrinkable cable intermediate joint,a simulation model of 35 kV cold shrinkable cable intermediate joint was established by the finite element simulation software.The electric-thermal-force field of the composite interface without defects and with metal impurities,circumferential scratches,and longitudinal scratches was simulated and calculated.The results show that the interface pressure has different effects on the joint deformation and electric field strength distortion under different conditions.The joint deformation with longitudinal scratch is more significant,and the field strength distribution at the defect is more obviously affected by the interface pressure.The field strength of the shielding tube is inversely proportional to the interface pressure,and the field strength of the stress cone in the joint with longitudinal scratches is directly proportional to the interface pressure.The overall field strength of the insulation composite interface except for the defects decreases with the increase of the interface pressure.
作者
邢雅雯
咸日常
冷学冰
咸峰
李斌慧
牛为
顾志强
XING Yawen;XIAN Richang;LENG Xuebing;XIAN Feng;LI Binhui;NIU Wei;GU Zhiqiang(College of Electric and Electronic Engineering,Shandong University of Technology,Zibo 255000,China;Shandong Qixing Electric Technology Development Co.,Ltd.,Zibo 255000,China)
出处
《绝缘材料》
CAS
北大核心
2024年第10期114-124,共11页
Insulating Materials
基金
国家自然科学基金资助项目(52077221)。
关键词
电缆中间接头
界面压力
杂质
划痕
场强畸变
变形
cable intermediate joint
interface pressure
impurity
scratch
field intensity distortion
deformation
