Optimierte Bestimmung der Ankunftszeiten von UHF Signalen für die Lokalisierung von Teilentladungen in Leistungstransformatoren

authored by

Mohammad Esmaeil Akbari Azirani, Mohamadreza Ariannik, Peter Werle, Asghar Akbari Akbari

Abstract

Location of a partial discharge (PD) fault inside a transformer can be determined using the Ultrahigh Frequency (UHF) PD measurement technique. Hereby, the electromagnetic waves that propagate due to the PD are captured using specially designed probes that are inserted into the transformer tank through its oil drain valves. The difference in the arrival time of these signals is the base of an equation system, where the PD location and the PD inception time are unknown. In this contribution, the influence of erroneous determined arrival times on the localization error is investigated using a two-dimensional analogy model. Furthermore, a novel method based on detection of abrupt changes in a certain statistical property of the signal for the arrival time determination is proposed. A test setup is utilized to evaluate the localization algorithm. Finally, the results are presented and the precision of the proposed method for PD localization using the UHF measurement technique is discussed.

Organisation(s)

High Voltage Engineering and Asset Management Section (Schering Institute)

External Organisation(s)

K.N. Toosi University of Technology (KNTU)

Type

Conference contribution

Pages

291-296

No. of pages

6

Publication date

2018

Publication status

Published

Peer reviewed

Yes

ASJC Scopus subject areas

Energy Engineering and Power Technology, Electrical and Electronic Engineering