S
S. Coenen
Researcher at University of Stuttgart
Publications - 11
Citations - 387
S. Coenen is an academic researcher from University of Stuttgart. The author has contributed to research in topics: Partial discharge & Transformer. The author has an hindex of 8, co-authored 11 publications receiving 331 citations.
Papers
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Journal ArticleDOI
Diagnostic Measurements for Power Transformers
Stefan Tenbohlen,S. Coenen,Mohammad Djamali,Andreas Müller,Mohammad Hamed Samimi,Martin Siegel +5 more
TL;DR: In this paper, the authors present the status and current trends of different diagnostic techniques of power transformers and provide significant tutorial elements, backed up by case studies, results and some analysis.
Journal ArticleDOI
Application of UHF sensors for PD measurement at power transformers
TL;DR: In this article, a new calibration procedure for the UHF method is proposed and discussed in respect of the procedure for IEC 60270 compliant conventional electric method, which is based on the concept of transmitting electromagnetic waves through the transformer tank from one UHF sensor to another.
Journal ArticleDOI
Sensitivity of UHF PD measurements in power transformers
TL;DR: In this paper, the attenuation of UHF signals within power transformers is investigated, and the so-called Sensitivity Check might show in future a relation between unconventionally measured UHF quantities to the apparent charge level in pico Coulomb.
Journal ArticleDOI
Calibration Proposal for UHF Partial Discharge Measurements at Power Transformers
Martin Siegel,S. Coenen,Michael Beltle,Stefan Tenbohlen,Marc Weber,Pascal Fehlmann,Stefan M. Hoek,Ulrich Kempf,Robert Schwarz,Thomas Linn,Jitka Fuhr +10 more
TL;DR: A calibration procedure is proposed for the UHF method to ensure both, reproducibility and comparability of UHF measurements and only a calibrated UHF measurement procedure can be introduced supplementary to IEC 60270 in acceptance tests of power transformers.
Proceedings ArticleDOI
On-site experiences with multi-terminal IEC PD measurements, UHF PD measurements and acoustic PD localisation
TL;DR: In this article, a combination of different partial discharge (PD) measurement methods was used to detect PD in power transformers and to improve interpretation and localisation of their sources, and the results showed promising results.