A feasibility study on estimating induced charge of partial discharges in transformer windings adjacent to its origin

Publikation: Beitrag in FachzeitschriftArtikelForschungPeer-Review

Autoren

  • Sahand Seifi
  • Peter Werle
  • Amir Abbas Shayegani Akmal
  • Hossein Mohseni
  • Hossein Borsi

Externe Organisationen

  • University of Tehran
Forschungs-netzwerk anzeigen

Details

OriginalspracheEnglisch
Aufsatznummer106899
FachzeitschriftInternational Journal of Electrical Power and Energy Systems
Jahrgang129
Frühes Online-Datum2 März 2021
PublikationsstatusVeröffentlicht - Juli 2021

Abstract

Partial discharge (PD) measurement is a powerful tool for assessing the insulating system of power transformers. Among all the developed methods for PD monitoring, the electrical PD measurement is the only recommended method by the standard for the acceptance test of transformers due to its calibration possibility of the charge of PDs, specified as the apparent charge. However, the significant dependency of apparent charges to the location of the PDs inside the transformer winding makes the defining a proper threshold value as an accepted PD level a demanding task. In this contribution, the feasibility of a new method to estimate the charge of the PD at its origin in the winding has been studied. The proposed method reconstructs the original current of PD in a limited bandwidth using PD signals measured at terminals of a transformer along with the sectional winding transfer functions and the input impedance of the winding. The original charge of PD will be determined from its reconstructed original currents. This charge value can provide a more robust threshold value for the PD acceptance test as well as a better evaluation of the severity of PD. According to the proposed method results, the estimated charge values are in the range of 0.26–1.88 of the original charge of PD, while the apparent charge values could be 0.02 of the original charge value in the IEC standard method.

ASJC Scopus Sachgebiete

Zitieren

A feasibility study on estimating induced charge of partial discharges in transformer windings adjacent to its origin. / Seifi, Sahand; Werle, Peter; Shayegani Akmal, Amir Abbas et al.
in: International Journal of Electrical Power and Energy Systems, Jahrgang 129, 106899, 07.2021.

Publikation: Beitrag in FachzeitschriftArtikelForschungPeer-Review

Seifi S, Werle P, Shayegani Akmal AA, Mohseni H, Borsi H. A feasibility study on estimating induced charge of partial discharges in transformer windings adjacent to its origin. International Journal of Electrical Power and Energy Systems. 2021 Jul;129:106899. Epub 2021 Mär 2. doi: 10.1016/j.ijepes.2021.106899
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title = "A feasibility study on estimating induced charge of partial discharges in transformer windings adjacent to its origin",
abstract = "Partial discharge (PD) measurement is a powerful tool for assessing the insulating system of power transformers. Among all the developed methods for PD monitoring, the electrical PD measurement is the only recommended method by the standard for the acceptance test of transformers due to its calibration possibility of the charge of PDs, specified as the apparent charge. However, the significant dependency of apparent charges to the location of the PDs inside the transformer winding makes the defining a proper threshold value as an accepted PD level a demanding task. In this contribution, the feasibility of a new method to estimate the charge of the PD at its origin in the winding has been studied. The proposed method reconstructs the original current of PD in a limited bandwidth using PD signals measured at terminals of a transformer along with the sectional winding transfer functions and the input impedance of the winding. The original charge of PD will be determined from its reconstructed original currents. This charge value can provide a more robust threshold value for the PD acceptance test as well as a better evaluation of the severity of PD. According to the proposed method results, the estimated charge values are in the range of 0.26–1.88 of the original charge of PD, while the apparent charge values could be 0.02 of the original charge value in the IEC standard method.",
keywords = "Apparent Charge, Charge Estimation, Partial Discharge (PD), Power Transformer, Real Charge, Transfer Function",
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AU - Seifi, Sahand

AU - Werle, Peter

AU - Shayegani Akmal, Amir Abbas

AU - Mohseni, Hossein

AU - Borsi, Hossein

PY - 2021/7

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AB - Partial discharge (PD) measurement is a powerful tool for assessing the insulating system of power transformers. Among all the developed methods for PD monitoring, the electrical PD measurement is the only recommended method by the standard for the acceptance test of transformers due to its calibration possibility of the charge of PDs, specified as the apparent charge. However, the significant dependency of apparent charges to the location of the PDs inside the transformer winding makes the defining a proper threshold value as an accepted PD level a demanding task. In this contribution, the feasibility of a new method to estimate the charge of the PD at its origin in the winding has been studied. The proposed method reconstructs the original current of PD in a limited bandwidth using PD signals measured at terminals of a transformer along with the sectional winding transfer functions and the input impedance of the winding. The original charge of PD will be determined from its reconstructed original currents. This charge value can provide a more robust threshold value for the PD acceptance test as well as a better evaluation of the severity of PD. According to the proposed method results, the estimated charge values are in the range of 0.26–1.88 of the original charge of PD, while the apparent charge values could be 0.02 of the original charge value in the IEC standard method.

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KW - Transfer Function

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