Three measuring points for partial discharge location in energized covered-conductor overhead distribution lines

Algorithm and experimental evaluation

Muzamir Isa, Nagy I. Elkalashy, Murtaza Hashmi, M. Shafiq, Matti Lehtonen

Research output: Contribution to journalArticleScientificpeer-review

Abstract

The experimental evaluation of Rogowski coil performance for locating partial discharge (PD) in energized covered-conductor (CC) overhead lines is performed. A multi-end measuring point is introduced, where the Rogowski coils looped around the CC line at three different locations and connected to the oscilloscope for measurements. The tests are carried out concerning different measurement conditions such as off-line and on-line PD measuring systems. For off-line measurements, the calibrator pulse is used to inject PD source to the CC overhead lines. Meanwhile for on-line measurement, CC line is energized by a 110/20 kV power transformer and the concept of twisted-coil around the CC is introduced in order to produce a pulse similar to the PD source. The performance of Rogowski coil is tested in noisy environment. Chirp detector is used as a signal processing tool to extract the high frequency signals in order to determine the time of arrival (TOA) signals at each measuring sensors. The locator function algorithm for multi-end measurement is developed. The results obtained from this work confirm the capability of the Rogowski coil to measure and locate the high frequency PD source on the CC line in consistent with energizing AC source. Meanwhile, using the locator function algorithm developed, the localization of PD source point on CC overhead lines is found out without the need to know the propagation velocity of the signals.
Original languageEnglish
Pages (from-to)5221-5229
JournalInternational Review of Electrical Engineering
Volume7
Issue number4
Publication statusPublished - 2012
MoE publication typeA1 Journal article-refereed

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Partial discharges
Overhead lines
Power transformers
Signal processing
Detectors
Sensors

Keywords

  • Distribution network
  • overhead covered-conductor
  • partial disharge
  • PD sensors
  • Rogowski coil

Cite this

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title = "Three measuring points for partial discharge location in energized covered-conductor overhead distribution lines: Algorithm and experimental evaluation",
abstract = "The experimental evaluation of Rogowski coil performance for locating partial discharge (PD) in energized covered-conductor (CC) overhead lines is performed. A multi-end measuring point is introduced, where the Rogowski coils looped around the CC line at three different locations and connected to the oscilloscope for measurements. The tests are carried out concerning different measurement conditions such as off-line and on-line PD measuring systems. For off-line measurements, the calibrator pulse is used to inject PD source to the CC overhead lines. Meanwhile for on-line measurement, CC line is energized by a 110/20 kV power transformer and the concept of twisted-coil around the CC is introduced in order to produce a pulse similar to the PD source. The performance of Rogowski coil is tested in noisy environment. Chirp detector is used as a signal processing tool to extract the high frequency signals in order to determine the time of arrival (TOA) signals at each measuring sensors. The locator function algorithm for multi-end measurement is developed. The results obtained from this work confirm the capability of the Rogowski coil to measure and locate the high frequency PD source on the CC line in consistent with energizing AC source. Meanwhile, using the locator function algorithm developed, the localization of PD source point on CC overhead lines is found out without the need to know the propagation velocity of the signals.",
keywords = "Distribution network, overhead covered-conductor, partial disharge, PD sensors, Rogowski coil",
author = "Muzamir Isa and Elkalashy, {Nagy I.} and Murtaza Hashmi and M. Shafiq and Matti Lehtonen",
year = "2012",
language = "English",
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Three measuring points for partial discharge location in energized covered-conductor overhead distribution lines : Algorithm and experimental evaluation. / Isa, Muzamir; Elkalashy, Nagy I.; Hashmi, Murtaza; Shafiq, M.; Lehtonen, Matti.

In: International Review of Electrical Engineering, Vol. 7, No. 4, 2012, p. 5221-5229.

Research output: Contribution to journalArticleScientificpeer-review

TY - JOUR

T1 - Three measuring points for partial discharge location in energized covered-conductor overhead distribution lines

T2 - Algorithm and experimental evaluation

AU - Isa, Muzamir

AU - Elkalashy, Nagy I.

AU - Hashmi, Murtaza

AU - Shafiq, M.

AU - Lehtonen, Matti

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N2 - The experimental evaluation of Rogowski coil performance for locating partial discharge (PD) in energized covered-conductor (CC) overhead lines is performed. A multi-end measuring point is introduced, where the Rogowski coils looped around the CC line at three different locations and connected to the oscilloscope for measurements. The tests are carried out concerning different measurement conditions such as off-line and on-line PD measuring systems. For off-line measurements, the calibrator pulse is used to inject PD source to the CC overhead lines. Meanwhile for on-line measurement, CC line is energized by a 110/20 kV power transformer and the concept of twisted-coil around the CC is introduced in order to produce a pulse similar to the PD source. The performance of Rogowski coil is tested in noisy environment. Chirp detector is used as a signal processing tool to extract the high frequency signals in order to determine the time of arrival (TOA) signals at each measuring sensors. The locator function algorithm for multi-end measurement is developed. The results obtained from this work confirm the capability of the Rogowski coil to measure and locate the high frequency PD source on the CC line in consistent with energizing AC source. Meanwhile, using the locator function algorithm developed, the localization of PD source point on CC overhead lines is found out without the need to know the propagation velocity of the signals.

AB - The experimental evaluation of Rogowski coil performance for locating partial discharge (PD) in energized covered-conductor (CC) overhead lines is performed. A multi-end measuring point is introduced, where the Rogowski coils looped around the CC line at three different locations and connected to the oscilloscope for measurements. The tests are carried out concerning different measurement conditions such as off-line and on-line PD measuring systems. For off-line measurements, the calibrator pulse is used to inject PD source to the CC overhead lines. Meanwhile for on-line measurement, CC line is energized by a 110/20 kV power transformer and the concept of twisted-coil around the CC is introduced in order to produce a pulse similar to the PD source. The performance of Rogowski coil is tested in noisy environment. Chirp detector is used as a signal processing tool to extract the high frequency signals in order to determine the time of arrival (TOA) signals at each measuring sensors. The locator function algorithm for multi-end measurement is developed. The results obtained from this work confirm the capability of the Rogowski coil to measure and locate the high frequency PD source on the CC line in consistent with energizing AC source. Meanwhile, using the locator function algorithm developed, the localization of PD source point on CC overhead lines is found out without the need to know the propagation velocity of the signals.

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KW - partial disharge

KW - PD sensors

KW - Rogowski coil

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JO - International Review of Electrical Engineering

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