Giant Magneto-Resistive (GMR) Sensors for Non-Contacting Partial Discharge Detection

Yun Chen*, Luis Carlos Castro Heredia, Johan J. Smit*, Mohamad Ghaffarian Niasar, Robert Ross

*Corresponding author for this work

Research output: Contribution to journalArticleScientificpeer-review

1 Citation (Scopus)
7 Downloads (Pure)


Partial discharge (PD) detection is a standardized technique to qualify the insulation condition in power equipment. The main purpose of the article is to evaluate the performance of an extra high-sensitivity adapted giant magneto-resistive (xMR) sensor for non-contacting PD detection. First, compensation and signal conditioning circuits of the sensor are designed. Frequency response and time-domain response to fast calibrator pulses of the sensor with the implemented circuit are measured. Besides, PD experiments based on corona and surface models are carried out and compared with measurements using a high-frequency current transformer (HFCT). The results show that the xMR system can measure the magnetic fields produced by the PDs at distances up to 50 cm. The correlation between the HFCT and xMR signals is proportional under different voltages, showing that PDs can be effectively detected and evaluated by this method. PDs in a cross-linked polyethylene (XLPE) cable with an artificial discharging defect are successfully measured, demonstrating the sensitivity and performance of the xMR system.

Original languageEnglish
Article number6004411
Number of pages11
JournalIEEE Transactions on Instrumentation and Measurement
Publication statusPublished - 2023

Bibliographical note

Green Open Access added to TU Delft Institutional Repository 'You share, we take care!' - Taverne project
Otherwise as indicated in the copyright section: the publisher is the copyright holder of this work and the author uses the Dutch legislation to make this work public.


  • Cross-linked polyethylene (XLPE) cable
  • electromagnetic field measurement, giant magneto-resistive (GMR) sensor
  • Giant magneto-resistive (GMR)
  • partial discharge (PD)


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