A joint vibration and arcing measurement system for online condition monitoring of on-load tap changer of power transformer

Seo, Junhyuck, Ma, Hui and Saha, Tapan (2016) A joint vibration and arcing measurement system for online condition monitoring of on-load tap changer of power transformer. IEEE Transactions on Power Delivery, . doi:10.1109/TPWRD.2016.2531186


Author Seo, Junhyuck
Ma, Hui
Saha, Tapan
Title A joint vibration and arcing measurement system for online condition monitoring of on-load tap changer of power transformer
Journal name IEEE Transactions on Power Delivery   Check publisher's open access policy
ISSN 0885-8977
1937-4208
Publication date 2016-02-18
Sub-type Article (original research)
DOI 10.1109/TPWRD.2016.2531186
Open Access Status Not Open Access
Total pages 8
Place of publication Piscataway, NJ, United States
Publisher Institute of Electrical and Electronics Engineers
Collection year 2017
Abstract Vibration measurement has been adopted in some utilities in Australia, Canada and several European countries for online condition monitoring of power transformer’s On-Load Tap Changer (OLTC). By comparing measured vibration signals at different stages, it might be possible to assess changes of OLTC’s condition. However, there are still considerable difficulties in correlating vibration signals to events of OLTC operation, which may impair the capability of vibration measurement for OLTC condition monitoring. Therefore, arcing measurement is proposed in this paper to complement to vibration measurement. Arcing is provoked when OLTC switching contact closes at a fixed tap position and it can lead to electromagnetic signals flowing through transformer windings and finally reaches earth. The arcing measurement is achieved by using a High Frequency Current Transducer (HFCT) clamping on the transformer’s grounding cable. The joint vibration and arcing measurement can provide a better means for interpreting events involved in OLTC operation and facilitating an improved OLTC condition monitoring. Since HFCT measured arcing signals can be coupled with noise, a probabilistic wavelet transform is thus employed in this paper to extract arcing signals from noise. Field measurements on two different types of OLTCs are performed using the joint vibration and arcing measurement system to validate the proposed methodology.
Keyword Arcing
Condition monitoring
On-load tap changer (OLTC)
Power transformer
Vibration
Wavelet transform
Q-Index Code C1
Q-Index Status Provisional Code
Institutional Status UQ

Document type: Journal Article
Sub-type: Article (original research)
Collections: HERDC Pre-Audit
School of Information Technology and Electrical Engineering Publications
 
Versions
Version Filter Type
Citation counts: Google Scholar Search Google Scholar
Created: Mon, 22 Feb 2016, 12:07:00 EST by Dr Hui Ma on behalf of School of Information Technol and Elec Engineering