硅橡胶电导特性对XLPE绝缘高压直流电缆中间接头内电场分布的影响
发布时间:2018-05-29 02:04
本文选题:高压直流电缆 + 电缆接头 ; 参考:《南方电网技术》2015年10期
【摘要】:为改善交联聚乙烯(XLPE)绝缘高压直流电缆中间接头内的电场分布,通过添加纳米填料制备了用于制作电缆接头应力控制体的非线性硅橡胶复合材料。建立了高压直流电缆接头仿真模型,测试了各绝缘材料的电导特性,计算了电缆接头内的电场分布。研究结果表明,70℃时在各场强下未改性硅橡胶的电导率都小于高压直流电缆XLPE绝缘,故电缆接头内的最高场强点位于硅橡胶增强绝缘内,且最大场强远大于电缆本体绝缘的平均场强;以非线性硅橡胶做应力控制体增强绝缘时,超过一定场强后增强绝缘的电导率明显大于XLPE绝缘,保证了电缆接头内最高场强点永远位于XLPE绝缘内,且接近于平均场强。
[Abstract]:In order to improve the electric field distribution in the interconnect of HV DC cable with XLPE insulation, a nonlinear silicone rubber composite was prepared by adding nano-filler to fabricate the stress controller of cable joint. The simulation model of HVDC cable joint is established, the electrical conductivity of each insulating material is tested, and the electric field distribution in the cable joint is calculated. The results show that the conductivity of unmodified silicone rubber at 70 鈩,
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