基于微波透射法的瓷质绝缘子XWP-70劣化检测  

Microwave Transmission Method for Detecting Deteriorated Ceramic Insulators

作　　者：万勋 刘正庭 龚政雄 尹骏刚 汪霄飞 吴润琪 姚建刚[2] WAN Xun;LIU Zhengting;GONG Zhengxiong;YIN Jungang;WANG Xiaofei;WU Runqi;YAO Jiangang(State Grid Hunan Electric Power Company Electric Power Research Institute,Changsha 410007,China;School of Electrical and Information Engineering,Hunan University,Changsha 410082,China;State Grid Hunan Electric Power Company Power Transmission Maintenance Branch,Hengyang 421002,China)

机构地区：[1]国网湖南省电力有限公司电力科学研究院,长沙410007 [2]湖南大学电气与信息工程学院,长沙410082 [3]国网湖南省电力有限公司输电检修分公司,湖南衡阳421002

出　　处：《电瓷避雷器》2020年第4期207-214,共8页Insulators and Surge Arresters

基　　金：国网湖南省电力公司科研基金(编号:5216A517000T)。

摘　　要：为了对瓷质绝缘子进行非接触式快速无损检测,提出一种基于微波透射法的绝缘子劣化检测方法。该方法根据介质中均匀平面波传输理论,对微波在绝缘子内部及交界面的传播过程进行分析。通过将绝缘子复杂结构简化成均匀介质层,建立了微波在绝缘子内部及交界面传输过程的数学模型。利用矢量网络分析仪和毫米波天线搭建了微波检测平台,对从现场取回的绝缘子样本进行对比实验。所实测的散射参量S21幅值差异的最大值达到16 d B以上,灵敏度较高,初步证明了微波透射方法应用于瓷质绝缘子劣化检测的可行性。A method for detecting the deterioration of insulator based on microwave transmission method is proposed.According to the theory of microwave transmission under the condition of the material,shape and property of the insulator,the propagation process of microwave inside and at the interface of the insulator is analyzed and verified by the experiment.By simplifying the complex structure of insulators into uniform dielectric layer,the mathematical model of microwave transmission process inside and at the interface of insulators is established,and the feasibility is verified theoretically.Using the Vector Network analyzer and millimeter wave antenna to build the microwave detection platform with the microwave wavelength of millimeter.The comparison experiment on the insulator samples retrieved from the substation was carried out,and the S21 difference reaches the 16 dB,which indicates its high recognition degree and the feasibility of microwave transmission detection method for the detection of degraded porcelain insulators.

关 键 词：微波透射法 瓷质绝缘子劣化检测 微波透射角度 检测距离 天线极化 

分 类 号：TM216[一般工业技术—材料科学与工程]