复合绝缘子内部缺陷超声相控阵柔性耦合检测
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摘要
为解决小管径复合绝缘子内部缺陷在线检测中超声探头与绝缘子耦合困难的问题,提出了一种基于水囊柔性耦合的复合绝缘子超声相控阵检测方法。该方法利用材质与绝缘子护套声学特性接近的硅橡胶水囊实现探头与绝缘子的良好耦合。并分别进行了护套和芯棒的缺陷检测实验。实验结果表明:针对护套,水囊耦合法与传统水浸法均能够检测到直径1.0mm的缺陷,且二者相控阵扫描图像一致;针对芯棒,水囊耦合法能够检测到直径2.0 mm的多处缺陷,缺陷识别率高。实验验证了水囊耦合法应用于超声相控阵复合绝缘子检测的可行性,为输电线路复合绝缘子内部缺陷在线检测奠定了基础。
In order to solve the difficult problem of the coupling between ultrasonic probe and insulator in the on-line detection of internal defects of small-diameter composite insulator, a method for ultrasonic phased array detection of composite insulators based on flexible coupling of water capsule was proposed. In the method, the similar acoustic characteristics of the insulator sheath and a silicone rubber water capsule were used to achieve a well coupling between the probe and the insulator, and the defect detection experiments of the composite insulator sheath and core were carried out,respectively. The experimental results show that the defects of the diameter of 1.0 mm can be detected by the water capsule coupling and the water immersion method for the composite insulator sheath, and the phased array scanning images of two methods are consistent. Multiple defects with a diameter of 2.0 mm for the composite insulator core can be detected with the method of water capsule coupling, and the rate of defect recognition is high. The experiments can verify that the water capsule coupling method can be feasibly applied to the detection of composite insulator with ultrasonic phased array, which lays a foundation for the on-line detection of the internal defects of composite insulator.
In order to solve the difficult problem of the coupling between ultrasonic probe and insulator in the on-line detection of internal defects of small-diameter composite insulator, a method for ultrasonic phased array detection of composite insulators based on flexible coupling of water capsule was proposed. In the method, the similar acoustic characteristics of the insulator sheath and a silicone rubber water capsule were used to achieve a well coupling between the probe and the insulator, and the defect detection experiments of the composite insulator sheath and core were carried out,respectively. The experimental results show that the defects of the diameter of 1.0 mm can be detected by the water capsule coupling and the water immersion method for the composite insulator sheath, and the phased array scanning images of two methods are consistent. Multiple defects with a diameter of 2.0 mm for the composite insulator core can be detected with the method of water capsule coupling, and the rate of defect recognition is high. The experiments can verify that the water capsule coupling method can be feasibly applied to the detection of composite insulator with ultrasonic phased array, which lays a foundation for the on-line detection of the internal defects of composite insulator.
引文
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[15]朱晓恒,高晓蓉,王黎,等.超声探伤技术在无损检测中的应用[J].现代电子技术,2010,37(21):112-116.ZHU Xiaoheng,GAO Xiaorong,WANG Li,et al.Application of ultrasonic flaw detection in non-destructive test[J].Modern Electronics Technique,2010,37(21):112-116.
[16]施克仁,郭寓岷.相控阵超声成像检测[M].北京:高等教育出版社,2010:15-24.SHI Keren,GUO Yumin.Phased array ultrasonic imaging and testing[M].Beijing,China:Higher Education Press,2010:15-24.
[17]鲍晓宇.相控阵超声检测系统及其关键技术的研究[D].北京,清华大学,2003.BAO Xiaoyu.Research on phased array ultrasonic testing system and its key technology[D].Beijing,China:Tsinghua University,2003.
[18]JEROME P,ANDRES G,JESUS V,et al.Phased array technology concepts,probes and applications[C]∥8th European Congress on Non Destructive Testing.Barcelina,Spain:[s.n.],2002.
[19]KRAMB V A,OLDING R B,SEBASTIAN J R.Considerations for using phased array ultrasonics in a fully automate inspection system[J].Review of Progress in Quantitative Nondestructive Evaluation,2004(23):817-825.
[2]王黎明,李昂,成立.复合绝缘子微波无损检测方法的关键因素研究[J].高电压技术,2017,43(1):203-209.WANG Liming,LI Ang,CHENG Li,et al.Key factors of microwave non-destructive testing on composite insulators[J].High Voltage Engineering,2017,43(1):203-209.
[3]关志成.绝缘子及输变电外绝缘[M].北京:清华大学出版社,2006:61-65.GUAN Zhicheng.External insulation of insulators and power transmission and transformation equipment[M].Beijing,China:Press of Tsinghua University,2006:61-65.
[4]王黎明,李昂,成立,等.基于微波反射法的复合绝缘子无损检测方法[J].高电压技术,2015,41(2):584-591.WANG Liming,LI Ang,CHENG Li,et al.Microwave-based non-destructive testing method on composite insulators[J].High Voltage Engineering,2015,41(2):584-591.
[5]张志劲,蒋兴良,孙才新,等.染污绝缘子串直流污闪放电模型及验证[J].电工技术学报,2009,24(4):36-41.ZHANG Zhijin,JIANG Xingliang,SUN Caixin,et al.DC pollution flashover model and its validation of polluted insulator strings[J].Transactions of China Electrotechnical Society,2009,24(4):36-41.
[6]韩永霞,唐力,郝艳捧,等.特高压直流线路复合绝缘子悬挂方式对其冲击闪络特性的影响[J].高电压技术,2015,41(4):1272-1277.HAN Yongxia,TANG Li,HAO Yanpeng,et al.Influence of suspension patterns of UHVDC line composite insulator on its impulse flashover characteristics[J].High Voltage Engineering,2015,41(4):1272-1277.
[7]关志成,彭功茂,王黎明,等.复合绝缘子的应用及关键技术研究[J].高电压技术,2011,37(3):513-519.GUAN Zhicheng,PENG Gongmao,WANG Liming,et al.Application and key technical study of composite insulators[J].High Voltage Engineering,2011,37(3):513-519.
[8]谢从珍,袁超,何子兰,等.复合绝缘子典型内部缺陷的相控阵检测[J].高电压技术,2014,40(3):837-842.XIE Congzhen,YUAN Chao,HE Zilan,et al.Phased array detection of typical internal defects of composite insulator[J].High Voltage Engineering,2014,40(3):837-842.
[9]熊兰,刘钰,姚树友,等.污秽绝缘子紫外在线监测系统[J].电工技术学报,2010,25(7):186-191.XIONG Lan,LIU Yu,YAO Shuyou,et al.Ultraviolet on-line monitoring system for contaminated insulators[J].Transactions of China Electrotechnical Society,2010,25(7):186-191.
[10]李衍.相控阵超声检测国际动态[J].无损检测,2008,32(6):56-60.LI Yan.International dynamic ultrasonic testing of phased array ultrasonic testing[J].Nondestructive Testing,2008,32(6):56-60.
[11]高英,梁曦东,薛家麒,等.超声脉冲检测硅橡胶内部缺陷的研究[J].高电压技术,1997,23(2):58-63.GAO Ying,LIANG Xidong,XUE Jiaqi,et al.Ultrasonic pulse-echo method to detect the faults in silicone rubber[J].High Voltage Engineering,1997,23(2):58-63.
[12]YUAN C,XIE C,LI L,et al.Ultrasonic phased array detection of internal defects in composite insulators[J].IEEE Transactions on Dielectrics&Electrical Insulation,2016,23(1):525-531.
[13]谢从珍,何子兰,凌永兴,等.相控阵超声波检测复合绝缘子内部缺陷[J].中国电机工程学报,2012(增刊1):63-68.XIE Congzhen,HE Zilan,LING Yongxing,et al.Using ultrasonic phased array to inspect the internal defects of composite insulators[J].Proceedings of the CSEE,2012(Supplement 1):63-68.
[14]谢从珍,张尧,郝艳捧,等.应用超声波探伤仪检测复合绝缘子的内部缺陷[J].高电压技术,2009,35(10):2464-2469.XIE Congzhen,ZHANG Yao,HAO Yanpeng,et al.Application of ultrasonic flaw detector to internal defects in composite insulators[J].High Voltage Engineering,2009,35(10):2464-2469.
[15]朱晓恒,高晓蓉,王黎,等.超声探伤技术在无损检测中的应用[J].现代电子技术,2010,37(21):112-116.ZHU Xiaoheng,GAO Xiaorong,WANG Li,et al.Application of ultrasonic flaw detection in non-destructive test[J].Modern Electronics Technique,2010,37(21):112-116.
[16]施克仁,郭寓岷.相控阵超声成像检测[M].北京:高等教育出版社,2010:15-24.SHI Keren,GUO Yumin.Phased array ultrasonic imaging and testing[M].Beijing,China:Higher Education Press,2010:15-24.
[17]鲍晓宇.相控阵超声检测系统及其关键技术的研究[D].北京,清华大学,2003.BAO Xiaoyu.Research on phased array ultrasonic testing system and its key technology[D].Beijing,China:Tsinghua University,2003.
[18]JEROME P,ANDRES G,JESUS V,et al.Phased array technology concepts,probes and applications[C]∥8th European Congress on Non Destructive Testing.Barcelina,Spain:[s.n.],2002.
[19]KRAMB V A,OLDING R B,SEBASTIAN J R.Considerations for using phased array ultrasonics in a fully automate inspection system[J].Review of Progress in Quantitative Nondestructive Evaluation,2004(23):817-825.