Detail publikace

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

MYŠKA, R. DREXLER, P.

Originální název

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

Anglický název

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

Jazyk

en

Originální abstrakt

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.

Anglický abstrakt

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.

Dokumenty

BibTex


@inproceedings{BUT91106,
  author="Radek {Myška} and Petr {Drexler}",
  title="The Development of Methods for Estimation of Time Differences of Arrival of Pulse Signals",
  annote="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.",
  booktitle="Progress in Electromagnetics Research Symposium Proceedings, KL, Malaysia",
  chapter="91106",
  howpublished="electronic, physical medium",
  year="2012",
  month="march",
  pages="709--713",
  type="conference paper"
}