Streaming electrification dynamics in the multilayer sensor

I. A. Metwally, P. Leblanc, T. Paillat

Research output: Contribution to journalArticle

4 Citations (Scopus)

Abstract

Streaming electrification dynamics is experimentally investigated by using a multilayer sensor in a closed loop and fresh transformer oil. This sensor consists of two identical rectangular oil ducts constructed by pressboard paper and separated by a middle copper plane electrode. The ground current from this middle electrode is measured. Two outer steel plane electrodes are connected together and used to measure the capacitive 'accumulation' current. The leakage currents at the sensor inlet and outlet, as well as the streaming current are also measured. The waveforms of these five currents together and oil temperature at the sensor inlet are simultaneously recorded for laminar flow and at controlled operating conditions; namely, oil temperature, mean flow velocity, humidity, and pressure. The results reveal that the all-recorded currents nonlinearly augment with oil temperature and linearly with oil-flow velocity. These results are interpreted in terms of shear stress, physicochemical reaction, the effect of streaming/floating potential on the electrical double layer (EDL), temperature-dependent oil properties, and introducing an expression of the streaming current. Calculations of accumulated charges on steel electrodes and the loating potential of the copper electrode at different oil-flow velocities, and the fully developed wall space-charge density and physicochemical reaction coefficient are presented.

Original languageEnglish
Article number6651758
Pages (from-to)168-177
Number of pages10
JournalIEEE Transactions on Power Delivery
Volume29
Issue number1
DOIs
Publication statusPublished - Feb 2014

Fingerprint

Multilayers
Sensors
Electrodes
Flow velocity
Copper
Temperature
Insulating oil
Steel
Oils
Charge density
Laminar flow
Electric space charge
Leakage currents
Ducts
Shear stress
Atmospheric humidity

Keywords

  • Electrical double layer
  • flow electrification
  • oil insulation
  • power transformers
  • streaming current

ASJC Scopus subject areas

  • Electrical and Electronic Engineering
  • Energy Engineering and Power Technology

Cite this

Streaming electrification dynamics in the multilayer sensor. / Metwally, I. A.; Leblanc, P.; Paillat, T.

In: IEEE Transactions on Power Delivery, Vol. 29, No. 1, 6651758, 02.2014, p. 168-177.

Research output: Contribution to journalArticle

Metwally, I. A. ; Leblanc, P. ; Paillat, T. / Streaming electrification dynamics in the multilayer sensor. In: IEEE Transactions on Power Delivery. 2014 ; Vol. 29, No. 1. pp. 168-177.
@article{dd8b8869a81c4dba98b7d8923bfba1c6,
title = "Streaming electrification dynamics in the multilayer sensor",
abstract = "Streaming electrification dynamics is experimentally investigated by using a multilayer sensor in a closed loop and fresh transformer oil. This sensor consists of two identical rectangular oil ducts constructed by pressboard paper and separated by a middle copper plane electrode. The ground current from this middle electrode is measured. Two outer steel plane electrodes are connected together and used to measure the capacitive 'accumulation' current. The leakage currents at the sensor inlet and outlet, as well as the streaming current are also measured. The waveforms of these five currents together and oil temperature at the sensor inlet are simultaneously recorded for laminar flow and at controlled operating conditions; namely, oil temperature, mean flow velocity, humidity, and pressure. The results reveal that the all-recorded currents nonlinearly augment with oil temperature and linearly with oil-flow velocity. These results are interpreted in terms of shear stress, physicochemical reaction, the effect of streaming/floating potential on the electrical double layer (EDL), temperature-dependent oil properties, and introducing an expression of the streaming current. Calculations of accumulated charges on steel electrodes and the loating potential of the copper electrode at different oil-flow velocities, and the fully developed wall space-charge density and physicochemical reaction coefficient are presented.",
keywords = "Electrical double layer, flow electrification, oil insulation, power transformers, streaming current",
author = "Metwally, {I. A.} and P. Leblanc and T. Paillat",
year = "2014",
month = "2",
doi = "10.1109/TPWRD.2013.2285562",
language = "English",
volume = "29",
pages = "168--177",
journal = "IEEE Transactions on Power Delivery",
issn = "0885-8977",
publisher = "Institute of Electrical and Electronics Engineers Inc.",
number = "1",

}

TY - JOUR

T1 - Streaming electrification dynamics in the multilayer sensor

AU - Metwally, I. A.

AU - Leblanc, P.

AU - Paillat, T.

PY - 2014/2

Y1 - 2014/2

N2 - Streaming electrification dynamics is experimentally investigated by using a multilayer sensor in a closed loop and fresh transformer oil. This sensor consists of two identical rectangular oil ducts constructed by pressboard paper and separated by a middle copper plane electrode. The ground current from this middle electrode is measured. Two outer steel plane electrodes are connected together and used to measure the capacitive 'accumulation' current. The leakage currents at the sensor inlet and outlet, as well as the streaming current are also measured. The waveforms of these five currents together and oil temperature at the sensor inlet are simultaneously recorded for laminar flow and at controlled operating conditions; namely, oil temperature, mean flow velocity, humidity, and pressure. The results reveal that the all-recorded currents nonlinearly augment with oil temperature and linearly with oil-flow velocity. These results are interpreted in terms of shear stress, physicochemical reaction, the effect of streaming/floating potential on the electrical double layer (EDL), temperature-dependent oil properties, and introducing an expression of the streaming current. Calculations of accumulated charges on steel electrodes and the loating potential of the copper electrode at different oil-flow velocities, and the fully developed wall space-charge density and physicochemical reaction coefficient are presented.

AB - Streaming electrification dynamics is experimentally investigated by using a multilayer sensor in a closed loop and fresh transformer oil. This sensor consists of two identical rectangular oil ducts constructed by pressboard paper and separated by a middle copper plane electrode. The ground current from this middle electrode is measured. Two outer steel plane electrodes are connected together and used to measure the capacitive 'accumulation' current. The leakage currents at the sensor inlet and outlet, as well as the streaming current are also measured. The waveforms of these five currents together and oil temperature at the sensor inlet are simultaneously recorded for laminar flow and at controlled operating conditions; namely, oil temperature, mean flow velocity, humidity, and pressure. The results reveal that the all-recorded currents nonlinearly augment with oil temperature and linearly with oil-flow velocity. These results are interpreted in terms of shear stress, physicochemical reaction, the effect of streaming/floating potential on the electrical double layer (EDL), temperature-dependent oil properties, and introducing an expression of the streaming current. Calculations of accumulated charges on steel electrodes and the loating potential of the copper electrode at different oil-flow velocities, and the fully developed wall space-charge density and physicochemical reaction coefficient are presented.

KW - Electrical double layer

KW - flow electrification

KW - oil insulation

KW - power transformers

KW - streaming current

UR - http://www.scopus.com/inward/record.url?scp=84893815500&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=84893815500&partnerID=8YFLogxK

U2 - 10.1109/TPWRD.2013.2285562

DO - 10.1109/TPWRD.2013.2285562

M3 - Article

VL - 29

SP - 168

EP - 177

JO - IEEE Transactions on Power Delivery

JF - IEEE Transactions on Power Delivery

SN - 0885-8977

IS - 1

M1 - 6651758

ER -