240MVA电力变压器局部放电的声发射检测
Acoustic Emission Testing of a 240MVA Power Transformer
摘 要
通过对一台240MVA电力变压器进行16通道的声发射局部放电在线检测, 阐述利用信号分析方法及三维定位技术, 在很强的噪声干扰状况下对局部放电信号的识别与定位。介绍了检测过程、信号分析方法与步骤, 给出了检测结论。得到的检测启示将有助于澄清以往对声发射用于局部放电检测的模糊观念, 并对如何有效地进行声发射局部放电在线检测起到积极的参考作用。
变压器
局部放电
Acoustic emission testing
Power transformer
Partial discharge
Abstract
Through conducting an on-line acoustic emission(AE) detection for partial discharge on a 240MVA power transformer by using a 16 channel system, discussion on how to identify the partial discharge signal and to realize 3D location from a very noisy environment with effective signal processing and 3D location techniques were given. It illustrated the testing process, signal processing methods and procedures. It also provided the test results. Upon successfully implementing the test, some specific issues were discussed and some important suggestions were concluded that were related to how to conduct partial discharge detection with the AE technique effectively. These suggestions would be helpful to clarify some previously existing ambiguous concepts regarding the effectiveness of the AE technique for partial discharge detection and would also be a valuable reference for future testing.
中图分类号 TG115.28
所属栏目 科研成果与学术交流
基金项目 广东省电力科学研究院重点科研项目资助(变压器局部放电声发射检测技术研究)
收稿日期 2008/4/3
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备注林介东(1963-), 男, 高级工程师, 中国无损检测学会电磁专业委员会委员、全国无损检测专业标准化技术委员会超声波检测工作组成员、中国电力工业无损检测人员资格考核委员会委员, 主要从事电力系统无损检测工作。
引用该论文: LIN Jie-Dong. Acoustic Emission Testing of a 240MVA Power Transformer[J]. Nondestructive Testing, 2009, 31(4): 245～250
林介东. 240MVA电力变压器局部放电的声发射检测[J]. 无损检测, 2009, 31(4): 245～250
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参考文献
【1】林介东, 胡 平, 马庆增, 等.增城变电站3号变压器C相声发射检测报告[R].广州: 广东省电力科学研究院,2005.
【2】胡 平, 林介东, 马庆增.声发射技术在变压器局部放电测量中的应用[J].无损检测,2004,26(10): 502-505.
【3】Sacha M Markalous, Stefan Tenbohlen, Kurt Feser. Improvement of acoustic detection and location accuracy by sensitive electromagnetic PD measurements under oil in the UHF range[C]. Proceedings of the XIVth International Symposium on High Voltage Engineering. Tsinghua University, Beijing: 2005.
【2】胡 平, 林介东, 马庆增.声发射技术在变压器局部放电测量中的应用[J].无损检测,2004,26(10): 502-505.
【3】Sacha M Markalous, Stefan Tenbohlen, Kurt Feser. Improvement of acoustic detection and location accuracy by sensitive electromagnetic PD measurements under oil in the UHF range[C]. Proceedings of the XIVth International Symposium on High Voltage Engineering. Tsinghua University, Beijing: 2005.
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