Gold-Diaphragm Based Fabry-Perot Ultrasonic Sensor for Partial Discharge Detection and Localization
Gold-Diaphragm Based Fabry-Perot Ultrasonic Sensor for Partial Discharge Detection and Localization
复制标题
基于金膜片的法布里-珀罗超声波传感器，用于局部放电检测和定位
DOI：
10.1109/jphot.2020.2982460
复制
发表时间：
2020-06-01
影响因子：
2.4
通讯作者：
Zhang, Jiangshan
中科院分区：
文献类型：
--
作者：
Zhang, Wei;Lu, Ping;Zhang, Jiangshan
声学测量是目前应用最广泛的局部放电非电检测方法，它通过检测局部放电产生的超声波来检测局部放电信号。针对传统法布里-珀罗干涉仪超声传感器灵敏度低、易受干扰等缺点，提出了一种基于金膜片的法布里-珀罗干涉仪超声传感器，并进行了实验验证。其高的声学灵敏度和方向不灵敏度显示了出色的局部放电检测和定位能力。实验结果表明，在20 kHz至150 kHz的标准超声信号施加时，良好的声学响应。频率范围涵盖了从PD过程中获得的声频。提出的光纤传感器测量的超声波信号从放电源不同的距离和入射角。输出显示衰减为1.32 dB/m，传感器可以检测远达3 m的微弱信号。每个测量距离的方向偏差系数小于10%，具有方向独立性。提出了两种基于传感器阵列（四个传感器）的定位方法，并通过仿真验证了其可行性。光纤超声波传感器具有成本低、结构紧凑、环境稳定性好、制造简单等优点，在电力系统的稳定维护中具有很大的应用潜力。
Acoustic measurement is the most widely used non-electric method to detect partial discharge (PD) signals by detect the ultrasonic waves arisen from partial discharge. To solve the shortages of low sensitivity and susceptibility to interferences, a gold diaphragm based Fabry-Perot interferometer ultrasonic sensor is proposed and experimentally demonstrated. Its high acoustic sensitivity and directional insensitivity shows great capability for PD detection and localization. Experimental results illustrate a well acoustic response from 20 kHz to 150 kHz when standard ultrasonic signals applied. The frequency range covers the acoustic frequencies derived from PD process. The ultrasonic signals from a discharge source is measured by the proposed fiber optic sensor with difference distances and incident angles. The output shows an attenuation of 1.32 dB/m and the sensor can detect weak signals as far as 3 m. The directional deviation coefficients are less than 10% for each measuring distance which exhibits directional independence. Two localization techniques with a sensor array (four sensors) are proposed and simulations are carried out to verify them feasible. The fiber-optic ultrasonic sensor may have a great potential in stability maintenance of electrical power systems due to its low cost, compact structure, environmentally robustness and simple manufacturing.