环氧/纸复合材料直流耐压寿命模型的估计方法  

Estimation Methods of DC Withstand Voltage Lifetime Model for Epoxy/Paper Composites

作　　者：曹雯[1,2] 宋倩文 申巍[3] 吕泽鹏 朱永灿[1] Cao Wen;Song Qianwen;Shen Wei;LüZepeng;Zhu Yongcan(School of Electronic Information Xi’an Polytechnic University,Xi’an 710048 China;School of Mechanical Engineering Northwestern Polytechnical University,Xi’an 710072 China;State Grid Shanxi Electric Power Research Institute,Xi’an 710054 China;State Key Laboratory of Electrical Insulation and Power Equipment Xi’an Jiaotong University,Xi’an 710049 China)

机构地区：[1]西安工程大学电子信息学院,西安710048 [2]西北工业大学机电学院,西安710072 [3]国网陕西省电力公司电力科学研究院,西安710054 [4]电力设备电气绝缘国家重点实验室(西安交通大学),西安710049

出　　处：《电工技术学报》2019年第18期3750-3758,共9页Transactions of China Electrotechnical Society

基　　金：国家自然科学基金(51707141);陕西省自然科学基础研究计划(018JQ5049)资助项目

摘　　要：针对适用于干式套管的环氧/纸复合材料的绝缘耐压性能进行了研究。首先运用蒙特卡 罗仿真方法对耐压试验方法的选择进行研究,分析并对比不同参数估计方法、不同大小样本、无 截尾耐压试验和截尾耐压试验下各种参数估计方法的误差,建议选用截尾耐压试验方法进行试验, 采用加权最小二乘法进行参数估计。然后,对环氧/纸复合材料的长期绝缘性能 耐压特性进行 试验研究。试验结果表明,环氧/纸复合材料试样的耐压试验结果符合 Weibull分布,该文建立的 环氧/纸复合材料的寿命模型可为套管绝缘材料结构设计提供技术支持。The insulated withstanding voltage performance of epoxy/paper composites for dry-type bushing was studied in this paper.Firstly,modeling and simulations were made through Mote Carlo method to analyze the errors of parameter estimation under different parameter estimation methods,different sample sizes,non-censored withstanding test and Type-II censored withstanding test.It was suggested to use the experimental method of tail-end withstanding voltage and the weighted least squares method.Next,the long-term insulating properties,i.e.the withstanding voltage properties of epoxy/paper composites,were experimentally studied.The results show that the voltage withstanding test of epoxy/paper composites follows Weibull distribution and the established lifetime model of epoxy/paper composites can provide technical support for the insulation structural design of bushing.

关 键 词：环氧/纸复合材料 耐压特性 寿命模型 定数截尾 参数估计 

分 类 号：TM215.92[一般工业技术—材料科学与工程]