Publication detail

Proposal of technical measures for a partial discharge detection system based on real measurement

DREXLER, P. ČÁP, M. MYŠKA, R. FIALA, P. STEINBAUER, M. KŘÍŽ, T.

Original Title

Proposal of technical measures for a partial discharge detection system based on real measurement

Type

conference paper

Language

English

Original Abstract

The article presents results of the measurement of partial discharge (PD) activity in power oil transformers. The method is based on measurement of electromagnetic waves in UHF spectrum produced by PD. The measurement of PD activity has been made on eight power transformers in the Dukovany nuclear power plant in the Czech Republic. The initial experimental measurement, which was under full working arrangements, has been accompanied by some issues. The recorded signals contained strong interference. It has been estimated, that the source of the interference is probably situated in the high voltage bushings, which feed the transformer from a turbo-generator. The interfering signal in form of electromagnetic waves has propagated through the air vicinity and it has coupled to the sensing heads. It has been found that the proper shielding is a crucial factor, while the PD signal level is far below the level of the interference. Further experiments have been conducted with an additional shielding and the interference level significantly decreased. The report on the results of the experimental measurement is given in the paper. There are shown waveform examples of the interfering signal. Further, the design of construction measure of the sensor casing, which allows to improve the shielding, is presented also. The functionality of proposed measure has been demonstrated in laboratory.

Keywords

partial discharge, power transformer, electromagnetic susceptibility, localization

Authors

DREXLER, P.; ČÁP, M.; MYŠKA, R.; FIALA, P.; STEINBAUER, M.; KŘÍŽ, T.

RIV year

2013

Released

25. 3. 2013

Publisher

The Electromagnetics Academy

Location

Taipei

ISBN

978-1-934142-24-0

Book

Proceedings of PIERS 2013 in Taipei, March 25-28, 2013

Pages from

1233

Pages to

1236

Pages count

4

BibTex

@inproceedings{BUT100151,
  author="Petr {Drexler} and Martin {Čáp} and Radek {Myška} and Pavel {Fiala} and Miloslav {Steinbauer} and Tomáš {Kříž}",
  title="Proposal of technical measures for a partial discharge detection system based on real measurement",
  booktitle="Proceedings of PIERS 2013 in Taipei, March 25-28, 2013",
  year="2013",
  pages="1233--1236",
  publisher="The Electromagnetics Academy",
  address="Taipei",
  isbn="978-1-934142-24-0"
}