XLPE/SiO<sub>2</sub>纳米复合材料长期直流老化特征寿命恶化分析

doi:10.19595/j.cnki.1000-6753.tces.L90101

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摘要为了研究纳米SiO₂改性后的交联聚乙烯（XLPE）在直流电场下的长期老化规律,该文对纯XLPE和XLPE/SiO₂纳米复合材料的老化性能进行对比研究。首先在不同直流电压下分别对两种材料进行老化实验,发现XLPE/SiO₂纳米复合材料在电场较高时的确具有较纯XLPE更优异的耐电特性,但随着施加直流电场的降低,XLPE/SiO₂纳米复合材料的特征寿命与纯XLPE的越来越接近,直到该文测试的最低直流电场强度115kV/mm（特征寿命1 000h以上）,XLPE/SiO₂纳米复合材料的特征寿命已低于纯XLPE。对比分析XLPE/SiO₂纳米复合材料和纯XLPE老化数据显示,纳米复合材料的寿命指数低于纯XLPE。该文直流老化研究结果表明,尽管XLPE/SiO₂纳米复合材料的短期电性能指标优于纯XLPE,但长期直流老化性能会比纯XLPE差。

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	L. A. Dissado

关键词 ： XLPE/SiO₂纳米复合材料, 直流老化, 特征寿命, 逆幂定律, 寿命指数

Abstract：In order to study the long-term aging characteristics of XLPE/SiO₂ nano-composites under HVDC, a comparative study of pure XLPE and XLPE/SiO₂ nano-composites was conducted. First, aging experiments were performed on both materials at different DC electric fields. It was found that XLPE/SiO₂ nano-composites did have better electrical and life characteristics than pure XLPE at higher electric fields. However, with the decrease of the DC electric field, the lifetime of XLPE/SiO₂ nano-composites was getting closer to that of pure XLPE. Until the minimum electric field is 115kV/mm, the characteristic lifetime of XLPE/SiO₂ nano-composites was shorter than that of pure XLPE. Experimental studies further found that the life index of XLPE/SiO₂ nano-composites was lower than that of pure XLPE. Therefore, although XLPE/SiO₂ nano-composites composite showed excellent short-term electrical properties, the long-term DC aging property might not be better than that of pure XLPE.

Key words： XLPE/SiO₂ nano-composites DC aging characteristic lifetime inverse power law life index

收稿日期: 2020-06-27

PACS:	TM215
	TM855

基金资助:山西省关键核心技术和共性技术研发攻关专项（2020XXX012）和国家自然科学基金（51377126）资助项目

通讯作者: 刘冠芳女,1983年生,硕士,高级工程师,研究方向为牵引电机绝缘测试与诊断。E-mail: liuguanfang@163.com

作者简介: 雷伟群男,1989年生,博士,工程师,研究方向为电介质材料的直流老化与介电特性。E-mail: christ_lei@163.com

引用本文:

雷伟群, 刘冠芳, 耿涛, 乌江, 郑晓泉, L. A. Dissado. XLPE/SiO₂纳米复合材料长期直流老化特征寿命恶化分析[J]. 电工技术学报, 2022, 37(2): 311-321. Lei Weiqun, Liu Guanfang, Geng Tao, Wu Jiang, Zheng Xiaoquan, L.A. Dissado. Analysis on the Characteristic Lifetime Deterioration of XLPE/SiO₂ Nano-Composites After Long-Term DC Aging. Transactions of China Electrotechnical Society, 2022, 37(2): 311-321.

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