高压电器2025，Vol.61Issue(2)：63-72,10.DOI:10.13296/j.1001-1609.hva.2025.02.008
变压器局部放电监测用压电传感器的压电材料特性及器件尺寸对灵敏度的影响研究
Research on Influence of Piezoelectric Material Properties and Element Size on Sensitivity of Piezoelectric Sensor for Partial Discharge Monitoring of Transformer
摘要
Abstract
Aiming at the contact piezoelectric ultrasonic sensor with the core sensing element of piezoelectric ceram-ic cylinder,the influence of piezoelectric material properties and size of element on the sensitivity of acoustoelectric conversion is studied.Based on physical field finite element simulation,the model of piezoelectric ultrasonic sensor is set up.Then,influence of the piezoelectric material characteristic parameters and the sensor structure parameters on the sensor acoustoelectric conversion sensitivity and resonant frequency in the frequency range of partial dis-charge of transformer is analyzed.And the design method to improve acoustoelectric conversion sensitivity of the sen-sor is proposed.The simulation results show that within the frequency range of 20-250 kHz,the sensitivity is maxi-mum with selection of piezoelectric material of PZT-2,diameter of 6 mm and thickness of 12 mm.When selecting the piezoelectric material of the sensor,the piezoelectric material with large constant d33 shall be selected firstly,and short circuit elastic compliance constant sE13 and sE33 of the material are modified through performance improvement so to achieve adjustment of the resonant frequency of the sensor.Finally,the simulation results of the structure optimi-zation are verified by experiments,and the experimental results and the simulation results are in agreement.关键词
局部放电/超声波/压电传感器/结构设计/灵敏度/有限元分析Key words
partial discharge/ultrasound/piezoelectric sensor/structure design/sensitivity/finite element analysis引用本文复制引用
王妍,陈川,朱佳怡,刘泳斌,高景晖..变压器局部放电监测用压电传感器的压电材料特性及器件尺寸对灵敏度的影响研究[J].高压电器,2025,61(2):63-72,10.基金项目
国家电网有限公司总部管理科技项目(5500-202058320A-0-0-00).Project Supported by Science and Technology Project of SGCC(5500-202058320A-0-0-00). （5500-202058320A-0-0-00）
