Real-time Load Current Monitoring of Overhead Lines Using GMR Sensors
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arXiv
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| Autores principales: | , , , , |
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| Formato: | Preprint |
| Publicado: |
2026
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| _version_ | 1866914318210039808 |
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| author | Chy, Md Mahfuzur Rahman Khan, Md Rifat Al Amin Mahamud, Md Sultan Sifat, Anwarul Islam McFadden, Fiona J. Stevens |
| author_facet | Chy, Md Mahfuzur Rahman Khan, Md Rifat Al Amin Mahamud, Md Sultan Sifat, Anwarul Islam McFadden, Fiona J. Stevens |
| contents | Non-contact current monitoring has emerged as a prominent research focus owing to its non-intrusive characteristics and low maintenance requirements. However, while they offer high sensitivity, contactless sensors necessitate sophisticated design methodologies and thorough experimental validation. In this study, a Giant Magneto-Resistance (GMR) sensor is employed to monitor the instantaneous currents of a three-phase 400-volt overhead line, and its performance is evaluated against that of a conventional contact-based Hall effect sensor. A mathematical framework is developed to calculate current from the measured magnetic field signals. Furthermore, a MATLAB-based dashboard is implemented to enable real-time visualization of current measurements from both sensors under linear and non-linear load conditions. The GMR current sensor achieved a relative accuracy of 64.64% to 91.49%, with most phases above 80%. Identified improvements over this are possible, indicating that the sensing method has potential as a basis for calculating phase currents. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2602_09213 |
| institution | arXiv |
| publishDate | 2026 |
| record_format | arxiv |
| spellingShingle | Real-time Load Current Monitoring of Overhead Lines Using GMR Sensors Chy, Md Mahfuzur Rahman Khan, Md Rifat Al Amin Mahamud, Md Sultan Sifat, Anwarul Islam McFadden, Fiona J. Stevens Systems and Control Non-contact current monitoring has emerged as a prominent research focus owing to its non-intrusive characteristics and low maintenance requirements. However, while they offer high sensitivity, contactless sensors necessitate sophisticated design methodologies and thorough experimental validation. In this study, a Giant Magneto-Resistance (GMR) sensor is employed to monitor the instantaneous currents of a three-phase 400-volt overhead line, and its performance is evaluated against that of a conventional contact-based Hall effect sensor. A mathematical framework is developed to calculate current from the measured magnetic field signals. Furthermore, a MATLAB-based dashboard is implemented to enable real-time visualization of current measurements from both sensors under linear and non-linear load conditions. The GMR current sensor achieved a relative accuracy of 64.64% to 91.49%, with most phases above 80%. Identified improvements over this are possible, indicating that the sensing method has potential as a basis for calculating phase currents. |
| title | Real-time Load Current Monitoring of Overhead Lines Using GMR Sensors |
| topic | Systems and Control |
| url | https://arxiv.org/abs/2602.09213 |