TY - GEN
T1 - Fem Analysis of TEV Sensor Design for Partial Discharge Detection in Power Transformers
AU - Abbasi, Mahdi
AU - Lachance, Mathieu
AU - David, Eric
N1 - Publisher Copyright:
© 2026 IEEE.
PY - 2026
Y1 - 2026
N2 - Partial discharge (PD) measurement is essential for assessing the insulation condition of power transformers, as PD is both a symptom and a cause of insulation degradation. The transient earth voltage (TEV) sensor is a non-intrusive technique that can be used during online operation of transformers. This paper aims to study the impact of the structure of the TEV sensor on its sensitivity. A 120 V / 25 kV transformer, including its active part and a TEV sensor, was modeled in COMSOL. Five parameters were investigated, including the thickness and material of the dielectric and electrode layers, as well as the effective sensing area of the sensor. The results reveal that insulation thickness and sensing area have the greatest influence on the detected TEV voltage amplitude compared with other parameters. The role of electromagnetic skin depth in the limited influence of electrode thickness was also discussed.
AB - Partial discharge (PD) measurement is essential for assessing the insulation condition of power transformers, as PD is both a symptom and a cause of insulation degradation. The transient earth voltage (TEV) sensor is a non-intrusive technique that can be used during online operation of transformers. This paper aims to study the impact of the structure of the TEV sensor on its sensitivity. A 120 V / 25 kV transformer, including its active part and a TEV sensor, was modeled in COMSOL. Five parameters were investigated, including the thickness and material of the dielectric and electrode layers, as well as the effective sensing area of the sensor. The results reveal that insulation thickness and sensing area have the greatest influence on the detected TEV voltage amplitude compared with other parameters. The role of electromagnetic skin depth in the limited influence of electrode thickness was also discussed.
KW - electromagnetic waves
KW - finite element method
KW - partial discharge
KW - power transformers
KW - transient earth voltage
UR - https://www.scopus.com/pages/publications/105050724552
U2 - 10.1109/ICD64907.2026.11665320
DO - 10.1109/ICD64907.2026.11665320
M3 - Contribution to conference proceedings
AN - SCOPUS:105050724552
T3 - 6th IEEE International Conference on Dielectrics: Next Generation Sustainable Dielectrics, ICD 2026
SP - 862
EP - 865
BT - 6th IEEE International Conference on Dielectrics
A2 - Chaudhary, Sunny
A2 - Saeedi, Istebreq
A2 - Tillotson, Liz
A2 - Vryonis, Orestis
A2 - Callender, George
A2 - Zaghari, Bahareh
A2 - Deeth-Kelt, Lauren
PB - Institute of Electrical and Electronics Engineers Inc.
T2 - 6th IEEE International Conference on Dielectrics, ICD 2026
Y2 - 21 June 2026 through 25 June 2026
ER -