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热塑性聚丙烯电缆电-热-力仿真研究

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采用COMSOL Multiphysics软件建立了 35kV三芯聚丙烯电力电缆电-热-力多物理场模型,仿真分析正常、过载、轻载运行情况下,聚丙烯电缆绝缘层中的电场、温度场分布特性,以及电缆弯曲时受力负荷对绝缘层的形变规律.结果表明:与轻载运行相比,过载运行时导电线芯处载流量增大,聚丙烯绝缘处的电场强度值最大增大了 1.16倍,绝缘层温度升高了 85.5℃.电缆安装弯曲半径为 8D 时,聚丙烯绝缘的形变量已经超过承受的最大耐形变值,有发生绝缘开裂的可能.
Electrical-Thermal-Mechanical Simulation of Thermoplastic Polypropylene Cables
The present work made a preliminary attempt to conduct electrical-thermal-mechanical modeling of a 35 kV three-core polypropylene power cable using COMSOL Multiphysics software.It simulated and analyzed the distribution characteristics of electric and temperature fields in the insulating layer under normal,overload,and light-load conditions,as well as the bending deformation pattern of the insulating layer.The results showed that,compared with light load oper-ation,the current at conductive core increased under heavy load condition,resulting in the increment of electric field strength at the polypropylene insulation by a maximum of 1.16 times,and the insulation layer temperature rise of 85.5℃.When the cable installation bending radius was 8D,the deformation of the polypropylene insulation exceeded the maxi-mum withstand deformation value,thereby possibly causing insulation cracking.

polypropylene cablecarrying capacityelectric field distributiontemperature field distributiondeformation

黄延举、胡东方、董高远、袁洪凯、顾华利、巴岩青

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国网山东省电力公司滨州供电公司,山东 滨州 256600

聚丙烯电缆 载流量 电场分布 温度场分布 形变量

2024

电工技术
重庆西南信息有限公司(原科技部西南信息中心)

电工技术

影响因子:0.177
ISSN:1002-1388
年,卷(期):2024.(19)