Title
Balanced Magnetic Antenna for Partial Discharge Measurements in Gas-Insulated Substations
Author
Mier Escurra, C. (TU Delft High Voltage Technology Group)
Mor, A. R. (Universitat Politécnica de Valencia)
Date
2022
Abstract
Recent research has found that Magnetic loop antennas can detect partial discharges (PD) in gas-insulated substations (GIS); however, unbalanced shielded loop (UBSL) antennas are affected by electric field coupling. This research proposes a balanced shielded loop (BSL) adapted for GIS PD sensing with different designs. The frequency response and PD charge estimation for BSL and UBSL antennas are analyzed and compared in a matched test bench using a very-fast pulse calibrator. The results confirmed a better common-mode noise rejection and thus a better charge estimation by using the balanced magnetic antenna. An alternative BSL design improved the antenna's gain by a factor of two, and by using a balun transformer, the gain was increased by a factor of 4. The results showed the criticality in the shielded gap placement and the influence of the antenna's parasitic elements on the balun's frequency response. This paper shows an improvement in the noise rejection using magnetic antennas, which leads to the possibility of better PD sensing in GIS.
Subject
Partial discharge
gas-insulated substation
GIS
magnetic antenna
common-mode noise
balanced shielded loop
To reference this document use:
http://resolver.tudelft.nl/uuid:dc1bc33e-793c-44cc-8b09-4c4a27ac77ea
DOI
https://doi.org/10.23919/CMD54214.2022.9991698
Publisher
IEEE, Piscataway
Embargo date
2023-07-02
ISBN
978-1-6654-7015-5
Source
Proceedings of the 2022 9th International Conference on Condition Monitoring and Diagnosis (CMD)
Event
2022 9th International Conference on Condition Monitoring and Diagnosis (CMD), 2022-11-13 → 2022-11-18, Kitakyushu, Japan
Bibliographical note
Green Open Access added to TU Delft Institutional Repository 'You share, we take care!' - Taverne project https://www.openaccess.nl/en/you-share-we-take-care 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.
Part of collection
Institutional Repository
Document type
conference paper
Rights
© 2022 C. Mier Escurra, A. R. Mor