结构形式及材料性能对220kV电缆终端应力锥的影响

Influnce of stucture shape and rubber property on 220 kV cable terminal stress cone

通过对220kV电缆终端应力锥在力场中进行的分析,说明结构形式及橡胶材料的性能对应力锥应力分布的影响十分明显。根据工程实际情况,由不同结构形式和橡胶材料组成了18种工况条件,并应用非线性有限元方法分别计算了各种工况下应力锥的应力分布。对环氧预制件结构的不同形式、应力锥锥角不同的大小以及采用不同性能的绝缘橡胶材料的应力锥应力分布曲线进行了分类比较,分析了结构形式和橡胶材料对220kV交联电缆终端应力锥应力分布的影响规律性。提出了结构形式和橡胶材料的选用建议,为实际设计提供参考。

Analysis of 220 kV cable terminal stress cone in force field shows that the influence of structure forms and rubber property on stress cone is very obvious. Based on engineering condition, the stress distributions of the 220 kV cable terminal stress cones with 18-boundary conditions shaped different structure shapes and different type of rubber materials were calculated by nonlinear finite element method. The stress distribution curves were compared according to the epoxy shell shape, the stress cone angle, and the class of rubber insulations. The influence laws of structure shape and type of rubber materials on stress distributions of the cable terminal stress cone were analyzed. From the results of comparison and analysis, suggestions for structure shape and type of rubber materials are presented to helpfully design the cable terminal.