PD-pulse characteristics in rotating machine insulation

Joachim Holbøll; Mogens Henriksen; A Jensen; F. Sørensen

doi:10.1109/ELINSL.1994.401502

PD-pulse characteristics in rotating machine insulation

Joachim Holbøll, Mogens Henriksen, A Jensen, F. Sørensen

Sk Forsyning A/S

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Abstract

In this paper results are presented from investigations on partial discharges (PD) in insulation systems, resembling the stator insulation in high voltage rotating machines. A model, simulating a stator winding in a slot, has been developed, consisting of simple rotating machine insulation test bars with epoxy/mica insulation, mounted between steel sheets forming a dot, in order to investigate the fundamental behaviour of PD in insulation defects in epoxy/mica insulation and the characteristics of the resulting electrical pulses. Stator slot couplers (SSC) were used to detect pulses coming from artificial defects implemented in the model as well as from the existing voids in the test bars' insulation. Some characteristic pulse shapes were found, which could be related partly to the defect type. The high frequency detection method, with directional couplers, made it possible to localize the defects thereby determining the pulse distortion in the chosen geometry. The influence of some parameters was investigated, such as the voltage applied, the location of the defect with respect to the sensor and the orientation of the defect in the slot. This information is essential for PD-detection systems where the noise/signal separation is based on the pulse shape, such as the SSC-technology used in the present investigations

Original language	English
Title of host publication	Conference Record of the IEEE International Symposium on Electrical Insulation
Publisher	IEEE
Publication date	1994
Pages	322-326
ISBN (Print)	07-80-31942-7
DOIs	https://doi.org/10.1109/ELINSL.1994.401502
Publication status	Published - 1994
Event	1994 IEEE International Symposium on Electrical Insulation - Pittsburgh, PA, United States Duration: 5 Jun 1994 → 8 Jun 1994 http://ieeexplore.ieee.org/xpl/mostRecentIssue.jsp?punumber=3187

Conference

Conference	1994 IEEE International Symposium on Electrical Insulation
Country/Territory	United States
City	Pittsburgh, PA
Period	05/06/1994 → 08/06/1994
Internet address	http://ieeexplore.ieee.org/xpl/mostRecentIssue.jsp?punumber=3187

Bibliographical note

Copyright: 1994 IEEE. Personal use of this material is permitted. However, permission to reprint/republish this material for advertising or promotional purposes or for creating new collective works for resale or redistribution to servers or lists, or to reuse any copyrighted component of this work in other works must be obtained from the IEEE

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@inproceedings{60f853481fc342a6bf489aeaae4bc7b4,

title = "PD-pulse characteristics in rotating machine insulation",

abstract = "In this paper results are presented from investigations on partial discharges (PD) in insulation systems, resembling the stator insulation in high voltage rotating machines. A model, simulating a stator winding in a slot, has been developed, consisting of simple rotating machine insulation test bars with epoxy/mica insulation, mounted between steel sheets forming a dot, in order to investigate the fundamental behaviour of PD in insulation defects in epoxy/mica insulation and the characteristics of the resulting electrical pulses. Stator slot couplers (SSC) were used to detect pulses coming from artificial defects implemented in the model as well as from the existing voids in the test bars' insulation. Some characteristic pulse shapes were found, which could be related partly to the defect type. The high frequency detection method, with directional couplers, made it possible to localize the defects thereby determining the pulse distortion in the chosen geometry. The influence of some parameters was investigated, such as the voltage applied, the location of the defect with respect to the sensor and the orientation of the defect in the slot. This information is essential for PD-detection systems where the noise/signal separation is based on the pulse shape, such as the SSC-technology used in the present investigations",

author = "Joachim Holb{\o}ll and Mogens Henriksen and A Jensen and F. S{\o}rensen",

note = "Copyright: 1994 IEEE. Personal use of this material is permitted. However, permission to reprint/republish this material for advertising or promotional purposes or for creating new collective works for resale or redistribution to servers or lists, or to reuse any copyrighted component of this work in other works must be obtained from the IEEE; 1994 IEEE International Symposium on Electrical Insulation ; Conference date: 05-06-1994 Through 08-06-1994",

year = "1994",

doi = "10.1109/ELINSL.1994.401502",

language = "English",

isbn = "07-80-31942-7",

pages = "322--326",

booktitle = "Conference Record of the IEEE International Symposium on Electrical Insulation",

publisher = "IEEE",

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url = "http://ieeexplore.ieee.org/xpl/mostRecentIssue.jsp?punumber=3187",

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T1 - PD-pulse characteristics in rotating machine insulation

AU - Holbøll, Joachim

AU - Henriksen, Mogens

AU - Jensen, A

AU - Sørensen, F.

N1 - Copyright: 1994 IEEE. Personal use of this material is permitted. However, permission to reprint/republish this material for advertising or promotional purposes or for creating new collective works for resale or redistribution to servers or lists, or to reuse any copyrighted component of this work in other works must be obtained from the IEEE

PY - 1994

Y1 - 1994

N2 - In this paper results are presented from investigations on partial discharges (PD) in insulation systems, resembling the stator insulation in high voltage rotating machines. A model, simulating a stator winding in a slot, has been developed, consisting of simple rotating machine insulation test bars with epoxy/mica insulation, mounted between steel sheets forming a dot, in order to investigate the fundamental behaviour of PD in insulation defects in epoxy/mica insulation and the characteristics of the resulting electrical pulses. Stator slot couplers (SSC) were used to detect pulses coming from artificial defects implemented in the model as well as from the existing voids in the test bars' insulation. Some characteristic pulse shapes were found, which could be related partly to the defect type. The high frequency detection method, with directional couplers, made it possible to localize the defects thereby determining the pulse distortion in the chosen geometry. The influence of some parameters was investigated, such as the voltage applied, the location of the defect with respect to the sensor and the orientation of the defect in the slot. This information is essential for PD-detection systems where the noise/signal separation is based on the pulse shape, such as the SSC-technology used in the present investigations

AB - In this paper results are presented from investigations on partial discharges (PD) in insulation systems, resembling the stator insulation in high voltage rotating machines. A model, simulating a stator winding in a slot, has been developed, consisting of simple rotating machine insulation test bars with epoxy/mica insulation, mounted between steel sheets forming a dot, in order to investigate the fundamental behaviour of PD in insulation defects in epoxy/mica insulation and the characteristics of the resulting electrical pulses. Stator slot couplers (SSC) were used to detect pulses coming from artificial defects implemented in the model as well as from the existing voids in the test bars' insulation. Some characteristic pulse shapes were found, which could be related partly to the defect type. The high frequency detection method, with directional couplers, made it possible to localize the defects thereby determining the pulse distortion in the chosen geometry. The influence of some parameters was investigated, such as the voltage applied, the location of the defect with respect to the sensor and the orientation of the defect in the slot. This information is essential for PD-detection systems where the noise/signal separation is based on the pulse shape, such as the SSC-technology used in the present investigations

U2 - 10.1109/ELINSL.1994.401502

DO - 10.1109/ELINSL.1994.401502

M3 - Article in proceedings

SN - 07-80-31942-7

SP - 322

EP - 326

BT - Conference Record of the IEEE International Symposium on Electrical Insulation

PB - IEEE

T2 - 1994 IEEE International Symposium on Electrical Insulation

Y2 - 5 June 1994 through 8 June 1994

ER -

PD-pulse characteristics in rotating machine insulation

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