振动条件下XLPE绝缘热老化的可靠性评估

发布时间：2018-07-02 11:24

  本文选题：交联聚乙烯 + 联合老化　； 参考：《高电压技术》2017年11期

【摘要】：为提高交联聚乙烯(XLPE)电缆绝缘材料在联合应力老化条件下寿命预测的可靠度,并探究其失效概率分布,设计了2组加速老化试验,在不同老化应力条件下,对多个XLPE材料样片进行电阻退化数据测试。测试数据通过时间尺度函数转换后,应用线性Wiener过程进行数据建模;同时利用传统阿仑尼乌斯(Arrhenius)方程、逆幂准则与材料寿命之间的关系,结合极大似然函数,对线性Wiener过程模型参数进行估计,最后经理论计算得出试验所用XLPE电缆绝缘材料的失效概率密度曲线、可靠度曲线及不同组合应力条件下其寿命分布图,同时结合实际敷设电缆在复杂振动工作环境下的应力水平等因素,计算得到在最高允许温度(90℃)下,外部振动加速度为0.5 m/s~2时,XLPE电缆绝缘材料预期寿命为17.8年。
[Abstract]:In order to improve the reliability of life prediction of XLPE cable insulation under combined stress aging, and to explore its failure probability distribution, two groups of accelerated aging tests were designed under different aging stress conditions. The resistance degradation data of multiple XLPE samples were tested. After the test data is converted by time scale function, the data is modeled by the linear Wiener process, and the relationship between the traditional Arrhenius (Arrhenius) equation, the inverse power criterion and the material life is combined with the maximum likelihood function. The parameters of linear Wiener process model are estimated. Finally, the failure probability density curve, reliability curve and life distribution diagram of XLPE cable insulation material used in the test are obtained by theoretical calculation. At the same time, considering the stress level of cable laying in complex vibration working environment, it is calculated that the life expectancy of XLPE cable insulation material is 17.8 years at the maximum allowable temperature (90 鈩，

本文编号：2089961