固体介质声耦合光纤法珀传感器局部放电检测方法  

Fabry-Perot Sensor with Solid Dielectric Acoustic Coupling for Partial Discharge Detection

作　　者：程立丰 张伟超 赵洪[1] 范江东 李明 王少华 CHENG Lifeng;ZHANG Weichao;ZHAO Hong;FAN Jiangdong;LI Ming;WANG Shaohua(Key Laboratory of Engineering Dielectrics and Its Application Ministry of Education,Harbin University of Science and Technology,Harbin,Heilongjiang 150080,China;State Grid Zhejiang Electric Power Co.,Ltd.,Hangzhou,Zhejiang 310007,China;Electric Power Research Institute of State Grid Zhejiang Electric Power Co.,Ltd.,Hangzhou,Zhejiang 310014,China)

机构地区：[1]工程电介质及其应用技术教育部重点实验室(哈尔滨理工大学),黑龙江哈尔滨150080 [2]国网浙江省电力有限公司,浙江杭州310007 [3]国网浙江省电力有限公司电力科学研究院,浙江杭州310014

出　　处：《广东电力》2020年第9期11-17,共7页Guangdong Electric Power

基　　金：国家自然科学基金青年基金项目(51607049);国网浙江省电力有限公司科技项目(5211WF200005)。

摘　　要：为解决非本征光纤法布里珀罗(简称“法珀”)传感器用于局部放电检测时内置安装不便,且液体介质粘滞阻尼导致传感器固有谐振频率降低问题,提出在固体介质表面安置法珀传感器进行局部放电检测的方法。首先根据声传播基本理论和有限元分析方法,设计可耦合固体介质声波的法珀传感器前端耦合结构,并制作传感器样品;继而分别采用压电陶瓷和绝缘油板板电极放电信号源,在绝缘油箱内外布置法珀传感器,对比外置法珀传感器和液体介质内置法珀传感器检测灵敏度。实验结果表明:外置固体声耦合的法珀传感器响应频率高于内置液体的法珀传感器,且两者对局部放电响应的灵敏度基本相当。The extrinsic fiber Fabry-Perot(EFFP)sensors for partial discharge(PD)detection are inconvenient to install in the equipment,and the viscous damping of liquid medium will cause the natural resonance frequency of the sensor decrease.To solve the above problems,this paper propose to place the F-P sensor on the surface of the solid dielectric for PD detection.Firstly,according to the basic theory of sound propagation and the finite element analysis method,it designs the F-P front-end coupling structure which can couple the sound waves of solid medium,and makes the sensor samples.Afterwards,it uses the piezoelectric ceramics transducer and the plate-plate electrode discharge signal source respectively to arrange the F-P sensor inside and outside the insulating oil tank,and then compares the detection sensitivity of the external F-P sensor and the F-P sensor placed in the liquid medium.The experimental results show that the response frequency of the external acoustic coupling F-P sensor is higher than that of the F-P sensor placed in the liquid medium.It is also proved that the sensitivities of the two sensors for PD response are basically the same.

关 键 词：固体介质 声耦合 法布里珀罗传感器 局部放电 声学仿真 

分 类 号：TM930[电气工程—电力电子与电力传动]