Publication detail

The Development of Methods for Estimation of Time Differences of Arrival of Pulse Signals

MYŠKA, R. DREXLER, P.

Original Title

The Development of Methods for Estimation of Time Differences of Arrival of Pulse Signals

Type

conference paper

Language

English

Original Abstract

This article deals with possibilities of processing of the pulse signals which are pro- duced by partial discharges (PD) in oil power transformers. Possible methods of signal processing are examined in the paper. One of the possibilities is electromagnetic waves sensing radiated by partial discharges in UHF range. Suitable sensors can be realized in a form of antennas. Detected signals may be used for PD source localization, which is based on method of signal time differences of arrival (TDOA). Hence, it is important to determine the front transient process in analyzed signals. The basic method for transient identification is to track the crossing of threshold level. However, this method may fail in case when obtained waveform doesn't contain expressive front transient. One of the solutions can be the modification of the basic method which consists in the observation of immediate power waveform of the signal. The second possibility is to calculate rate of energy accumulation waveform. The energy of the signal is transferred from the sensing space through the antenna on the input impedance of the recording instrument. Another group of methods is based on the signals cross-correlation which can also provide the TDOA of signal waveforms. The topic of the paper is focused on the application of suitable methods on data, which were acquired in a model of partial discharge detection system. The methods will be compared in view of their reliability and accuracy.

Keywords

partial discharges, oil power transformers, time differences of arrival

Authors

MYŠKA, R.; DREXLER, P.

RIV year

2012

Released

27. 3. 2012

ISBN

978-1-934142-12-7

Book

Progress in Electromagnetics Research Symposium Proceedings, KL, Malaysia

Pages from

709

Pages to

713

Pages count

5

BibTex

@inproceedings{BUT91106,
  author="Radek {Myška} and Petr {Drexler}",
  title="The Development of Methods for Estimation of Time Differences of Arrival of Pulse Signals",
  booktitle="Progress in Electromagnetics Research Symposium Proceedings, KL, Malaysia",
  year="2012",
  pages="709--713",
  isbn="978-1-934142-12-7"
}