基于有限元法的电缆金属护套感应电压仿真分析

发布时间：2019-02-08 17:02

【摘要】：为有效降低单芯电缆金属护套感应电压对电缆寿命及载流量的影响,科学合理地选择不同电缆结构的敷设排列方式和距离,利用有限元法对不同材料、结构的电缆金属护套感应电压进行了数值仿真分析。首先采用电磁感应定律对单芯电缆金属护套感应电压进行解析计算;再通过Ansoft Maxwell 15软件建立单回路电缆金属护套感应电压的3维简化模型,并验证了有限元分析方法的适用范围。在此基础上,计算护套、半导电屏蔽层在不同相对磁导率、体积电导率条件下的感应电压值,分析了钢带铠装层对金属护套感应电压的影响。结果表明,当金属护套的体积电导率由105 S/m增大到107 S/m时,电缆金属护套感应电压约降低2.86%;而当屏蔽材料的体积电导率由104 S/m增大到105 S/m时,电缆金属护套感应电压约降低6.06%。当金属护套的相对磁导率由1增大到10时,电缆金属护套感应电压约升高48.48%;而当屏蔽材料的相对磁导率由1增大到10时,电缆金属护套感应电压约升高6.06%;与无铠装层电缆相比,装有金属铠装层电缆的金属护套感应电压增大了近100%。
[Abstract]:In order to effectively reduce the influence of inductive voltage of metal sheathed single core cable on the cable life and carrier current, the arrangement and distance of different cable structures are selected scientifically and reasonably, and the finite element method is used to analyze different materials. The inductive voltage of metal sheathed cable is numerically simulated and analyzed. Firstly, the inductive voltage of metal sheathed single core cable is calculated analytically by electromagnetic induction law. Then, a three-dimensional simplified model of inductive voltage of single loop cable sheathed metal sheath is established by Ansoft Maxwell 15 software, and the application range of finite element analysis method is verified. On this basis, the inductive voltage values of sheathed, semi-conductive shielding layer under different relative permeability and volume conductivity are calculated, and the influence of steel strip sheathed layer on the inductive voltage of metal sheathed is analyzed. The results show that when the volume conductivity of the sheathing increases from 105s / m to 107S / m, the inductive voltage of the metal sheathing decreases by 2.86s / m. However, when the volume conductivity of the shielding material increases from 104s / m to 105S / m, the inductive voltage of the sheathed cable decreases by 6.06g. When the relative permeability of the metal sheath increases from 1 to 10:00, the inductive voltage of the metal sheath increases by 48.48 and 6.06 when the relative permeability of the shielding material increases from 1 to 10:00. Compared with unsheathed cable, the inductive voltage of metal sheathed cable increases by nearly 100.
【作者单位】：哈尔滨理工大学工程电介质及其应用教育部重点实验室;南方电网科学研究院有限责任公司;
【基金】：国家自然科学基金(51077029) 特高压工程技术(昆明、广州)国家工程实验室开放基金(NEL201118)~~
【分类号】：TM247

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