梁帅伟;廖瑞金;杨丽君;解兵;

• 1:高电压与电工新技术教育部重点实验室(重庆大学)
• 2:高电压与电工新技术教育部重点实验室(重庆大学)
• 3:高电压与电工新技术教育部重点实验室(重庆大学)
• 4:江苏省电力科学研究院 重庆市沙坪坝区400044

摘要(Abstract)：

传统局部放电检测方法测量和分析1MHz以下信号,测量频带窄、信息量少、易受干扰,不能全面反映局部放电本质特征。首先对多个试品进行电热联合老化试验,然后用超宽频带局部放电测试系统,将时域参数和频域参数相结合诊断油纸绝缘老化状态。通过逐步判别分析,先选取13个时频域特征参量中的8个重要特征参量,建立典型判别方程,描出对应的散点图。继而又推导出分别表征油纸绝缘5个老化阶段的Bayes线性判别方程。经原样本组内验证和Jackknife法交叉验证,所建方程组用于诊断油纸绝缘老化状态具有良好的效果。

关键词(KeyWords)： 逐步判别法;局部放电;油纸绝缘;超宽频带;变压器

Abstract:

Keywords:

基金项目(Foundation): 国家杰出青年科学基金资助项目(50425722)。~~

作者(Author): 梁帅伟;廖瑞金;杨丽君;解兵;

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DOI:

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