基于EFPI的数字配电网超声检测传感器

doi:10.11930/j.issn.1004-9649.202207022

中国电力 ›› 2023, Vol. 56 ›› Issue (6): 194-201.DOI: 10.11930/j.issn.1004-9649.202207022

基于EFPI的数字配电网超声检测传感器

鞠玲¹, 黄怿²

1. 国网江苏省电力有限公司泰州供电分公司，江苏泰州 225300;
2. 上海大学特种光纤与光接入网重点实验室，上海 200444

收稿日期:2022-07-14 修回日期:2023-05-06 发布日期:2023-07-04
作者简介:鞠玲（1986—），女，硕士，工程师，从事输变电设备检修运行技术研究，E-mail：juling163@163.com;黄怿（1978—），男，博士，教授，从事光纤局部放电传感技术研究，E-mail：huangyi1008@shu.edu.cn
基金资助:
国网泰州供电分公司科技项目（光纤 FP 腔传感器的 GIS 局放在线监测系统研究，J2021224）；上海市自然科学基金面上资助项目（22ZR142300）；国家自然科学基金资助项目（61875118）。

Ultrasonic Detection Sensor of Digital Distribution Network Based on EFPI

JU Ling¹, HUANG Yi²

1. State Grid Taizhou Power Supply Branch, Taizhou 225300, China;
2. Key Laboratory of Specialty Fiber Optics and Optical Access Networks, Shanghai University, Shanghai 200444, China

Received:2022-07-14 Revised:2023-05-06 Published:2023-07-04
Supported by:
This work is supported by Science & Technology Project of State Grid Taizhou Power Supply Branch (Research on GIS Partial Discharge Online Monitoring System of Optical Fiber F-P Cavity Sensor, No.J2021224), National Natural Science Foundation of Shanghai (No.22ZR142300) and National Natural Science Foundation of China (No.61875118)

摘要/Abstract

摘要： 针对数字配电网设备存在的局部放电（partial discharge，PD）超声信号检测需求，研究并设计了一种基于非本征型法布里-珀罗干涉（extrinsic Fabry-Perot interferometric，EFPI）的超声波传感器，用于检测PD产生的超声波信号。通过仿真软件COMSOL模拟了不同膜片厚度以及膜片半径的光纤法布里-珀罗（Fabry-Perot，F-P）传感器的灵敏度和固有频率，选择了最佳的结构参数并制作了EFPI传感器。仿真结果表明，传感器的灵敏度可以达到106.6 nm/kPa，固有频率为234.85 kHz。当频率为30 kHz和40 kHz的超声波信号分别加到传感器上时，EFPI超声波传感器检测到的频率分别为29.97 kHz和39.92 kHz。实验结果表明，该传感器可以准确地检测高压模拟罐体中PD产生的超声波信号，且可检测最小放电量为53 pC，具有体积小、频响范围宽、检测灵敏度高的特点，有良好的应用前景。

关键词: 非本征法布里-珀罗干涉传感器, 局部放电, 灵敏度, 固有频率, 放电量

Abstract: In order to meet the demand of partial discharge ultrasonic signal detection of digital distribution network equipment, an ultrasonic sensor based on extrinsic Fabry Perot interferometric (EFPI) is developed to detect the ultrasonic signal generated by partial discharge. Through the simulation software COMSOL, the sensitivity and natural frequency of the optical fiber Fabry Perot (F-P) sensors with different diaphragm thicknesses and diaphragm radius are simulated. And the EFPI sensors are fabricated with the selected optimal structural parameters. The simulation results show that the sensor can reach 106.6 nm/kPa in sensitivity and 234.85 kHz in natural frequency. When the ultrasonic signals with a frequency of 30 kHz and 40 kHz are added to the sensor respectively, the corresponding frequencies detected by EFPI ultrasonic sensor are 29.97 kHz and 39.92 kHz. The experimental results show that the sensor, which has the characteristics of small size, wide frequency response range and high detection sensitivity, can accurately detect the ultrasonic signal generated by local discharge in the high-voltage simulating tank with a minimum detectable discharge of 53 pC, and will have good application prospects.

Key words: extrinsic Fabry Perot interferometric sensor, partial discharge, sensitivity, natural frequency, discharge quantity

鞠玲, 黄怿. 基于EFPI的数字配电网超声检测传感器[J]. 中国电力, 2023, 56(6): 194-201.

JU Ling, HUANG Yi. Ultrasonic Detection Sensor of Digital Distribution Network Based on EFPI[J]. Electric Power, 2023, 56(6): 194-201.

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https://www.electricpower.com.cn/CN/Y2023/V56/I6/194

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基于EFPI的数字配电网超声检测传感器

Ultrasonic Detection Sensor of Digital Distribution Network Based on EFPI

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