Details
| Original language | English |
|---|---|
| Article number | 8682101 |
| Pages (from-to) | 1530-1539 |
| Number of pages | 10 |
| Journal | IEEE Transactions on Power Delivery |
| Volume | 34 |
| Issue number | 4 |
| Early online date | 9 Apr 2019 |
| Publication status | Published - Aug 2019 |
Abstract
Partial discharges (PDs) are among the various indicators that are utilized for monitoring of power transformers. PDs emit electromagnetic waves that can be received by inserting ultrahigh frequency probes inside the transformer tank, thus an advantage of this method is its higher robustness against external noises. In this contribution, an algorithm is proposed to localize PDs in power transformers by capturing and analyzing multiple signal sets. Detecting exact arrival times (ATs) of a signal set is a challenging task in the PD localization. Different AT detection methods are applied to several signal sets to compare their effectiveness. Furthermore, modifications are introduced to enhance the precision of the AT detection. A fraction of the analyzed signal sets provide acceptable coordinates for the PD location. The localization algorithm consists of two approaches including wavelet denoising and AT sequence determination to eliminate PD coordinates that lie significantly far from the real location of the PD. The rest of the PD coordinates are then divided into two sections using a clustering method, and the center of the favorable cluster yields the definite PD coordinates. Precision of the PD localization algorithm is validated by three measurements inside a specially designed transformer tank.
Keywords
- arrival time, localization, partial discharges, Transformers, UHF, wavelet denoising
ASJC Scopus subject areas
- Energy(all)
- Energy Engineering and Power Technology
- Engineering(all)
- Electrical and Electronic Engineering
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In: IEEE Transactions on Power Delivery, Vol. 34, No. 4, 8682101, 08.2019, p. 1530-1539.
Research output: Contribution to journal › Article › Research › peer review
}
TY - JOUR
T1 - UHF Measurement in Power Transformers
T2 - An Algorithm to Optimize Accuracy of Arrival Time Detection and PD Localization
AU - Ariannik, Mohamadreza
AU - Akbari Azirani, Mohammad
AU - Werle, Peter
AU - Azirani, Asghar Akbari
PY - 2019/8
Y1 - 2019/8
N2 - Partial discharges (PDs) are among the various indicators that are utilized for monitoring of power transformers. PDs emit electromagnetic waves that can be received by inserting ultrahigh frequency probes inside the transformer tank, thus an advantage of this method is its higher robustness against external noises. In this contribution, an algorithm is proposed to localize PDs in power transformers by capturing and analyzing multiple signal sets. Detecting exact arrival times (ATs) of a signal set is a challenging task in the PD localization. Different AT detection methods are applied to several signal sets to compare their effectiveness. Furthermore, modifications are introduced to enhance the precision of the AT detection. A fraction of the analyzed signal sets provide acceptable coordinates for the PD location. The localization algorithm consists of two approaches including wavelet denoising and AT sequence determination to eliminate PD coordinates that lie significantly far from the real location of the PD. The rest of the PD coordinates are then divided into two sections using a clustering method, and the center of the favorable cluster yields the definite PD coordinates. Precision of the PD localization algorithm is validated by three measurements inside a specially designed transformer tank.
AB - Partial discharges (PDs) are among the various indicators that are utilized for monitoring of power transformers. PDs emit electromagnetic waves that can be received by inserting ultrahigh frequency probes inside the transformer tank, thus an advantage of this method is its higher robustness against external noises. In this contribution, an algorithm is proposed to localize PDs in power transformers by capturing and analyzing multiple signal sets. Detecting exact arrival times (ATs) of a signal set is a challenging task in the PD localization. Different AT detection methods are applied to several signal sets to compare their effectiveness. Furthermore, modifications are introduced to enhance the precision of the AT detection. A fraction of the analyzed signal sets provide acceptable coordinates for the PD location. The localization algorithm consists of two approaches including wavelet denoising and AT sequence determination to eliminate PD coordinates that lie significantly far from the real location of the PD. The rest of the PD coordinates are then divided into two sections using a clustering method, and the center of the favorable cluster yields the definite PD coordinates. Precision of the PD localization algorithm is validated by three measurements inside a specially designed transformer tank.
KW - arrival time
KW - localization
KW - partial discharges
KW - Transformers
KW - UHF
KW - wavelet denoising
UR - http://www.scopus.com/inward/record.url?scp=85069935087&partnerID=8YFLogxK
U2 - 10.1109/TPWRD.2019.2909706
DO - 10.1109/TPWRD.2019.2909706
M3 - Article
AN - SCOPUS:85069935087
VL - 34
SP - 1530
EP - 1539
JO - IEEE Transactions on Power Delivery
JF - IEEE Transactions on Power Delivery
SN - 0885-8977
IS - 4
M1 - 8682101
ER -