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Design and Performance Study of Transformer Oil Moisture Content Detection Sensor Based on Metamaterial
ID：23 View Protection：ATTENDEE Updated Time：2025-11-10 10:56:07 Hits：214 Oral Presentation

Start Time：2025-11-22 14:10（Asia/Shanghai）

Duration：10min

Session：S3 Parallel Session 3 » S3-1Parallel Session 3-22 PM

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Abstract
Transformer oil plays a vital role in oil-immersed transformers, with its condition and performance directly impacting the operational efficiency and service life of the transformer. This paper proposes a metamaterial-based sensor for detecting water content in transformer oil. By measuring the resonance frequency difference at varying water concentrations, the sensor enables detection at low moisture levels. The sensor comprises a microstrip transmission line and a metamaterial resonator unit. Simulation of different resonator structures determined that a four-arm resonator configuration yields optimal sensor performance. Physical testing of the designed sensor using a network analyzer revealed that as water content increased from 0 ppm to 300 ppm, the sensor's resonant frequency decreased from 5.876 GHz to 5.8 GHz, exhibiting a linear relationship. The sensor designed in this paper is capable of detecting the moisture content of transformer oil with an accuracy of 50 ppm. This verifies the feasibility of using this sensor for the detection of transformer oil moisture content, providing a new solution for the condition monitoring of transformer oil.
Keywords
metamaterials, dielectric constant, transformer oil, resonant frequency, moisture content testing
Speaker
Liuyu He
Student Xi’an Jiaotong University

Submission Author
Shuang Wang Xi’an Jiaotong University
Liuyu He Xi’an Jiaotong University
Yue Chen Xi’an Jiaotong University
Qian Cao Xi’an Jiaotong University
Lingjun Zeng Xi’an Jiaotong University
Boyu Han Xi’an Jiaotong University
Siyu Du Xi'an Jiaotong University
Jiale Mao Xi’an Jiaotong University
Yu Chen Xi'an Jiaotong University
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Important Date

  • Conference Date

    Nov 21

    2025

    to

    Nov 23

    2025

  • Oct 20 2025

    Draft paper submission deadline

  • Dec 08 2025

    Registration deadline

Sponsored By
IEEE Instrumentation and Measurement Society
South China University of Technology
Organized By
South China University of Technology
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