Pre-determination of partial discharge inception voltage in power cables using electrode gaps in air under AC voltage

Faisal P. Mohamed, W. H. Siew, Bojie Sheng, Brian G. Stewart, Euan A. Morris

Research output: Contribution to conferencePaper

Abstract

The breakdown of insulation in cables while in service can cause considerable damage to equipment and the accessories to which they are connected. PD in cables arises due to the overstressing of cable insulation resulting from electric field enhancement caused by imperfections in cable core and screen. The nature and magnitude of PD activity depends upon the type of defect, aging, environmental factors, applied voltage and cable loading. Reduction in system voltage can potentially reduce PD, which will correspondingly extend the service life of the cable. Currently, industry voltage statutory requirements permit ±6% tolerance setting on nominal voltage on distribution networks. This ±6% voltage reduction on may have little or an adverse effect on PD magnitude depending on the nature of defect present in the cable. Hence there is a clear requirement to pre-determine the PD inception voltage in cables through laboratory experiments to understand the significance of voltage reduction. This means to verify the effect of voltage reduction on extinguishing or minimizing PD activity in cables.

In this paper, range of voltages at which PD incepts termed as partial discharge inception voltage(PDIV) is measured using a test cell containing different types of electrode configuration having different spacing. PDIV measured using the test cell is verified by conducting partial discharge testing in paper insulated lead covered (PILC) and cross-linked poly ethylene(XLPE) cables. It has been found that PDIV measured using the test cell and cable are in good agreement.

Conference

ConferenceIEEE International Pulsed Power Conference
Abbreviated titlePPC 2017
CountryUnited Kingdom
CityBrighton
Period18/06/1722/06/17

Fingerprint

Partial discharges
Cables
Electrodes
Electric potential
Air
Defects
Insulation
Cable cores
Accessories
Electric power distribution
Service life
Ethylene
Lead
Aging of materials
Electric fields

Keywords

  • power cables
  • insulation
  • partial discharge
  • PDIV
  • PD

Cite this

P. Mohamed, F., Siew, W. H., Sheng, B., Stewart, B. G., & Morris, E. A. (Accepted/In press). Pre-determination of partial discharge inception voltage in power cables using electrode gaps in air under AC voltage. Paper presented at IEEE International Pulsed Power Conference, Brighton, United Kingdom.
P. Mohamed, Faisal ; Siew, W. H. ; Sheng, Bojie ; Stewart, Brian G. ; Morris, Euan A. / Pre-determination of partial discharge inception voltage in power cables using electrode gaps in air under AC voltage. Paper presented at IEEE International Pulsed Power Conference, Brighton, United Kingdom.5 p.
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abstract = "The breakdown of insulation in cables while in service can cause considerable damage to equipment and the accessories to which they are connected. PD in cables arises due to the overstressing of cable insulation resulting from electric field enhancement caused by imperfections in cable core and screen. The nature and magnitude of PD activity depends upon the type of defect, aging, environmental factors, applied voltage and cable loading. Reduction in system voltage can potentially reduce PD, which will correspondingly extend the service life of the cable. Currently, industry voltage statutory requirements permit ±6{\%} tolerance setting on nominal voltage on distribution networks. This ±6{\%} voltage reduction on may have little or an adverse effect on PD magnitude depending on the nature of defect present in the cable. Hence there is a clear requirement to pre-determine the PD inception voltage in cables through laboratory experiments to understand the significance of voltage reduction. This means to verify the effect of voltage reduction on extinguishing or minimizing PD activity in cables.In this paper, range of voltages at which PD incepts termed as partial discharge inception voltage(PDIV) is measured using a test cell containing different types of electrode configuration having different spacing. PDIV measured using the test cell is verified by conducting partial discharge testing in paper insulated lead covered (PILC) and cross-linked poly ethylene(XLPE) cables. It has been found that PDIV measured using the test cell and cable are in good agreement.",
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note = "(c) 2017 IEEE. Personal use of this material is permitted. Permission from IEEE must be obtained for all other users, including reprinting/ republishing this material for advertising or promotional purposes, creating new collective works for resale or redistribution to servers or lists, or reuse of any copyrighted components of this work in other works.; IEEE International Pulsed Power Conference, PPC 2017 ; Conference date: 18-06-2017 Through 22-06-2017",
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P. Mohamed, F, Siew, WH, Sheng, B, Stewart, BG & Morris, EA 2017, 'Pre-determination of partial discharge inception voltage in power cables using electrode gaps in air under AC voltage' Paper presented at IEEE International Pulsed Power Conference, Brighton, United Kingdom, 18/06/17 - 22/06/17, .

Pre-determination of partial discharge inception voltage in power cables using electrode gaps in air under AC voltage. / P. Mohamed, Faisal; Siew, W. H.; Sheng, Bojie; Stewart, Brian G.; Morris, Euan A.

2017. Paper presented at IEEE International Pulsed Power Conference, Brighton, United Kingdom.

Research output: Contribution to conferencePaper

TY - CONF

T1 - Pre-determination of partial discharge inception voltage in power cables using electrode gaps in air under AC voltage

AU - P. Mohamed, Faisal

AU - Siew, W. H.

AU - Sheng, Bojie

AU - Stewart, Brian G.

AU - Morris, Euan A.

N1 - (c) 2017 IEEE. Personal use of this material is permitted. Permission from IEEE must be obtained for all other users, including reprinting/ republishing this material for advertising or promotional purposes, creating new collective works for resale or redistribution to servers or lists, or reuse of any copyrighted components of this work in other works.

PY - 2017/10/10

Y1 - 2017/10/10

N2 - The breakdown of insulation in cables while in service can cause considerable damage to equipment and the accessories to which they are connected. PD in cables arises due to the overstressing of cable insulation resulting from electric field enhancement caused by imperfections in cable core and screen. The nature and magnitude of PD activity depends upon the type of defect, aging, environmental factors, applied voltage and cable loading. Reduction in system voltage can potentially reduce PD, which will correspondingly extend the service life of the cable. Currently, industry voltage statutory requirements permit ±6% tolerance setting on nominal voltage on distribution networks. This ±6% voltage reduction on may have little or an adverse effect on PD magnitude depending on the nature of defect present in the cable. Hence there is a clear requirement to pre-determine the PD inception voltage in cables through laboratory experiments to understand the significance of voltage reduction. This means to verify the effect of voltage reduction on extinguishing or minimizing PD activity in cables.In this paper, range of voltages at which PD incepts termed as partial discharge inception voltage(PDIV) is measured using a test cell containing different types of electrode configuration having different spacing. PDIV measured using the test cell is verified by conducting partial discharge testing in paper insulated lead covered (PILC) and cross-linked poly ethylene(XLPE) cables. It has been found that PDIV measured using the test cell and cable are in good agreement.

AB - The breakdown of insulation in cables while in service can cause considerable damage to equipment and the accessories to which they are connected. PD in cables arises due to the overstressing of cable insulation resulting from electric field enhancement caused by imperfections in cable core and screen. The nature and magnitude of PD activity depends upon the type of defect, aging, environmental factors, applied voltage and cable loading. Reduction in system voltage can potentially reduce PD, which will correspondingly extend the service life of the cable. Currently, industry voltage statutory requirements permit ±6% tolerance setting on nominal voltage on distribution networks. This ±6% voltage reduction on may have little or an adverse effect on PD magnitude depending on the nature of defect present in the cable. Hence there is a clear requirement to pre-determine the PD inception voltage in cables through laboratory experiments to understand the significance of voltage reduction. This means to verify the effect of voltage reduction on extinguishing or minimizing PD activity in cables.In this paper, range of voltages at which PD incepts termed as partial discharge inception voltage(PDIV) is measured using a test cell containing different types of electrode configuration having different spacing. PDIV measured using the test cell is verified by conducting partial discharge testing in paper insulated lead covered (PILC) and cross-linked poly ethylene(XLPE) cables. It has been found that PDIV measured using the test cell and cable are in good agreement.

KW - power cables

KW - insulation

KW - partial discharge

KW - PDIV

KW - PD

UR - http://ece-events.unm.edu/ppc2017/

M3 - Paper

ER -

P. Mohamed F, Siew WH, Sheng B, Stewart BG, Morris EA. Pre-determination of partial discharge inception voltage in power cables using electrode gaps in air under AC voltage. 2017. Paper presented at IEEE International Pulsed Power Conference, Brighton, United Kingdom.