非线性电导材料应力锥改善电缆终端电场强度分布

发布时间：2018-05-12 13:16

本文选题：电缆终端 + 应力锥　；参考：《高电压技术》2017年02期

【摘要】：在电力系统中,预制橡胶应力锥是高压电缆终端的关键组成部分,它的特性决定了高压电缆运行的安全性。为此,通过建立预制橡胶应力锥的有限元数值仿真模型,分析了110 kV电缆终端的电场强度分布情况,提出采用非线性电导复合材料来替换固定电导材料,实现材料性能参数与空间电场强度大小的自适应匹配,起到智能改善空间电场强度分布的作用。结合理论分析,进一步确定了非线性电导材料参数。不同材料应力锥终端电场强度分布的对比结果表明:若非线性区域出现时所需电场强度过大,则会造成应力锥锥面处的电场强度过大;若非线性区域出现时所需电场强度过小,则会造成三相交界点处电场强度过大。选取合适的非线性电导材料对于应力锥锥面和交界点处的电场强度具有均匀作用,对发展更高电压等级电缆具有促进作用。
[Abstract]:In power system, prefabricated rubber stress cone is the key component of HV cable terminal, and its characteristics determine the safety of HV cable operation. Based on the finite element simulation model of prefabricated rubber stress cone, the distribution of electric field intensity of 110 kV cable terminal is analyzed, and the nonlinear conductance composite material is proposed to replace the fixed conductance material. The adaptive matching between the material performance parameters and the spatial electric field intensity is realized, which plays an intelligent role in improving the spatial electric field intensity distribution. Based on the theoretical analysis, the nonlinear conductance material parameters are further determined. The comparison of electric field intensity distribution at the end of stress cone of different materials shows that if the electric field intensity is too large when the nonlinear region appears, it will cause the electric field intensity at the cone of stress cone to be too large, and if the electric field intensity is too small when the nonlinear region appears, The electric field intensity at the three-phase junction will be too large. The selection of suitable nonlinear conductance material has a uniform effect on the electric field intensity at the conical surface and the junction point of the stress cone and promotes the development of higher voltage grade cable.
【作者单位】：清华大学电机工程与应用电子技术系电力系统及发电设备控制和仿真国家重点实验室;
【基金】：国家重点基础研究发展计划(973计划)(2014CB239504) 国家自然科学基金(51007046)~~
【分类号】：TM75

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