Research on Influence of Piezoelectric Material Properties and Element Size on Sensitivity of Piezoelectric Sensor for Partial Discharge Monitoring of Transformer

WANG Yan; CHEN Chuan; ZHU Jiayi; LIU Yongbin; GAO Jinghui

doi:10.13296/j.1001-1609.hva.2025.02.008

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Research on Influence of Piezoelectric Material Properties and Element Size on Sensitivity of Piezoelectric Sensor for Partial Discharge Monitoring of Transformer

Research & Analysis | 更新时间：2025-05-25

- Research on Influence of Piezoelectric Material Properties and Element Size on Sensitivity of Piezoelectric Sensor for Partial Discharge Monitoring of Transformer
- High Voltage Apparatus Vol. 61, Issue 2, Pages: 63-72(2025)
- 作者机构：
  
  1.全球能源互联网研究院有限公司电力传感技术研究所，北京　 102209
  2.西安交通大学电力设备电气绝缘国家重点实验室，西安　 710049
- 作者简介：
- 基金信息：
  
  Science and Technology Project of SGCC(5500-202058320A-0-0-00)
- DOI：10.13296/j.1001-1609.hva.2025.02.008
  CLC：
- Received：17 September 2024，
  
  Revised：21 November 2024，
  
  Published：16 February 2025
- 稿件说明：
移动端阅览
WANG Yan, CHEN Chuan, ZHU Jiayi, et al. Research on Influence of Piezoelectric Material Properties and Element Size on Sensitivity of Piezoelectric Sensor for Partial Discharge Monitoring of Transformer[J]. High voltage apparatus, 2025, 61(2): 63-72.
DOI：

WANG Yan, CHEN Chuan, ZHU Jiayi, et al. Research on Influence of Piezoelectric Material Properties and Element Size on Sensitivity of Piezoelectric Sensor for Partial Discharge Monitoring of Transformer[J]. High voltage apparatus, 2025, 61(2): 63-72. DOI： 10.13296/j.1001-1609.hva.2025.02.008.

摘要

针对核心传感元件为压电陶瓷圆柱的接触式压电超声传感器，研究了其压电材料特性及器件尺寸对声电转换灵敏度的影响。基于多物理场有限元仿真建立了压电超声传感器模型，计算分析了压电材料特性参数和传感器结构参数变化对传感器在变压器局部放电超声频率范围内声电转换灵敏度和谐振频率的影响，提出了提升声电转换灵敏度的压电传感器结构的设计方法。仿真结果表明，在20~250 kHz频率范围内，压电材料选取PZT-2、直径取6 mm、厚度取12 mm时灵敏度性能最高。在选择传感器的压电材料时，应先选择压电常数

大的压电材料，再通过对材料进行改性，改变材料的短路弹性顺度常数

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和

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，实现对传感器谐振频率的调节。最后，对该结构优化的仿真结果进行了实验验证，实验结果与仿真结果相吻合。

Abstract

Aiming at the contact piezoelectric ultrasonic sensor with the core sensing element of piezoelectric ceramic 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 discharge of transformer is analyzed. And the design method to improve acoustoelectric conversion sensitivity of the sensor is proposed. The simulation results show that within the frequency range of 20-250 kHz

the sensitivity is maximum 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

shall be selected firstly

and short circuit elastic compliance constant

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and

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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 optimization are verified by experiments

and the experimental results and the simulation results are in agreement.

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