广东电力2025，Vol.38Issue(12)：104-113,10.DOI:10.3969/j.issn.1007-290X.2025.12.010
高压电缆接头安装工艺缺陷下界面应力分布研究
Research on Interface Stress Distribution Under Defects in High Voltage Cable Joint Installation Process
摘要
Abstract
High voltage cables are key components of urban power supply networks,and the interface stress of cable joints is closely related to insulation performance.However,the defects in the installation process during on-site construction will significantly impact the interface stress distribution of the cable joints.Therefore,this study constructs the electrical-thermal-mechanical multi-physics field coupling model of 220 kV high voltage cable joint.By analyzing the mechanism of thermal stress variation,the study investigates the changes in interface stress at the insulation interface and the outer side of the high voltage shielding layer under different operating conditions.The results indicate that under the installation of the explosion-proof shell,the internal heat dissipation performance of the joint is poor and the interface stress is approximately 1.3 times that of the condition without the explosion-proof shell.When the filling glue inside the shell is insufficient,the interface stress increases with the rising proportion of air.Shortening the high voltage shielding layer leads to stress relaxation at the interface,resulting in a decrease in stress at both ends of the outer side,which increases the risk of discharge breakdown.When impurity particle defects exist at the interface,the degree of stress distortion increases with particle size,and compared to embedding particles in cross-linked polyethylene,embedding in silicon rubber results in higher interface stress and greater risk.关键词
高压电缆接头/多物理场耦合/复合界面/热应力/内部缺陷Key words
high voltage cable joint/multi-physics coupling/composite interface/thermal stress/internal defect分类
信息技术与安全科学引用本文复制引用
王维川,陈诚,徐勇..高压电缆接头安装工艺缺陷下界面应力分布研究[J].广东电力,2025,38(12):104-113,10.基金项目
国网江苏省电力有限公司科技项目(J2024053) （J2024053）
