| 发电机定子绕组绝缘缺陷及老化的声学检测 |
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| 引用本文： | 张晓虹,马小芹,卢伟胜,张亮,谢恒堃. 发电机定子绕组绝缘缺陷及老化的声学检测[J]. 电工电能新技术, 2001, 20(3): 23-28 |
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| 作者姓名： | 张晓虹 马小芹 卢伟胜 张亮 谢恒堃 |
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| 作者单位： | 1. 哈尔滨理工大学;西安交通大学
2. 西安交通大学 |
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| 基金项目： | 国家自然科学基金资助项目 !( 598372 60 ) |
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| 摘 要： | 利用自行开发的声学检测系统，研究了大电机主绝缘在电、热和机械应力作用下的老化特征。通过时－频分析和四个尺度的小波变换分析，证实电老化和机械应力老化导致绝缘的体密度降低，而热老化则对环氧／ 云母绝缘的宏观尺度的分层起关键作用。
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| 关 键 词： | 发电机 定子绕组 绝缘缺陷 老化 声学检测 |
| 文章编号： | 1003-3076(2001)03-0023-06 |
| 修稿时间： | 2000-09-13 |
Acoustic detection of defects and aging of stator winding insulation in generator |
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| ZHANG Xiao hong ,,MA Xiao qin ,LU Wei sheng ,ZHANG Liang+,XIE Heng kun. Acoustic detection of defects and aging of stator winding insulation in generator[J]. Advanced Technology of Electrical Engineering and Energy, 2001, 20(3): 23-28 |
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| Authors: | ZHANG Xiao hong MA Xiao qin LU Wei sheng ZHANG Liang+ XIE Heng kun |
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| Affiliation: | ZHANG Xiao hong 1,2,MA Xiao qin 2,LU Wei sheng 2,ZHANG Liang+2,XIE Heng kun 2 |
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| Abstract: | An acoustic detecting system developed by our research group is used to study defects and aging of stator winding insulation of generator,which is subjected to electrical,thermal and mechanical stresses for 1000 hours.The analysis of acoustic signal in time domain,frequency domain and wavelet transform in four scales has been carried out.It is found that electrical and mechanical stress aging leads to decrease in block density of expoxy/mica insulation and thermal aging has strong effect on delamination of the insulation.This acoustic detecting system is effective of finding defects in stator winding insulation of generator. |
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| Keywords: | stator winding insulation of generator acoustic detection defect in insulation |
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