预制式柔性电缆终端弯曲运行电场特性研究

针对目前预制式柔性电缆终端弯曲运行引起的闪络、电腐蚀性击穿及绝缘屏蔽层断口处击穿三种故障,基于有限元数值仿真对工频电压下预制式柔性电缆终端弯曲角度与弯曲位置的电场分布进行模拟计算,找出了不同弯曲位置引发故障类型的机理,确定了弯曲角度对电场分布不均匀度的影响。结果表明:预制式柔性电缆终端故障类型与弯曲位置密切相关,当弯曲角度低于 30°时,电场分布变化较小,可保证预制式柔性电缆终端安全、稳定运行。

Electric field characteristic research on prefabricated terminal of flexible cable bending operation

Aiming at the three kinds of faults such as flashover,electric corrosion breakdown andinsulation shielding fracture breakdown,caused by bending operation of prefabricated terminal offlexible cable,based on finite element numerical simulation,makes analog computation on electricfield distribution of bending angle and bending position of prefabricated terminal of flexible cableunder power frequency voltage,finds out the mechanism of different bending position causing faulttype,confirms the influence of bending angle on unequality degree of electric field distribution. Theresult shows that the faults type of prefabricated terminal of flexible cable has closely related withthe bending position,when the bending angle is below 30°,the change of electric field distributionis smaller,can ensure the safe and steady operation of the prefabricated terminal of flexible cable.