An online groundwall and phase-to-phase insulation quality assessment technique for AC-machine stator windings

Sang Bin Lee; Jinkyu Yang; Karim Younsi; Raj Mohan Bharadwaj

doi:10.1109/TIA.2006.876077

An online groundwall and phase-to-phase insulation quality assessment technique for AC-machine stator windings

Sang Bin Lee, Jinkyu Yang, Karim Younsi, Raj Mohan Bharadwaj

School of Electrical Engineering

Research output: Contribution to journal › Article › peer-review

58 Citations (Scopus)

Abstract

An online technique for monitoring the condition of the groundwall (GW) and phase-to-phase (PP) insulation for three-phase ac-machine stator windings is proposed in this paper. Insulation-condition indicators such as capacitance, dissipation factor (tan δ), and ac insulation resistance are calculated online based on the differential leakage-current measurements for each phase. A model for a three-phase ac-machine insulation system is derived and analyzed for both offline and online testing. Guidelines for interpreting the measured indicators for determining the: 1) overall condition and 2) significant degradation in the individual GW and PP insulation for each phase of the stator are given based on the analysis. Experimental results on a 15-hp induction motor under intentional GW and PP insulation degradation conditions show that incipient insulation degradation can be detected and classified with high sensitivity.

Original language	English
Pages (from-to)	946-957
Number of pages	12
Journal	IEEE Transactions on Industry Applications
Volume	42
Issue number	4
DOIs	https://doi.org/10.1109/TIA.2006.876077
Publication status	Published - 2006 Jul

Keywords

AC machines
Capacitance
Dissipation factor
Fault diagnosis
Groundwall (GW) insulation
Insulation resistance (IR)
Insulation testing
Online condition monitoring
Phase-to-phase (PP) insulation

ASJC Scopus subject areas

Control and Systems Engineering
Industrial and Manufacturing Engineering
Electrical and Electronic Engineering

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10.1109/TIA.2006.876077

Cite this

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title = "An online groundwall and phase-to-phase insulation quality assessment technique for AC-machine stator windings",

abstract = "An online technique for monitoring the condition of the groundwall (GW) and phase-to-phase (PP) insulation for three-phase ac-machine stator windings is proposed in this paper. Insulation-condition indicators such as capacitance, dissipation factor (tan δ), and ac insulation resistance are calculated online based on the differential leakage-current measurements for each phase. A model for a three-phase ac-machine insulation system is derived and analyzed for both offline and online testing. Guidelines for interpreting the measured indicators for determining the: 1) overall condition and 2) significant degradation in the individual GW and PP insulation for each phase of the stator are given based on the analysis. Experimental results on a 15-hp induction motor under intentional GW and PP insulation degradation conditions show that incipient insulation degradation can be detected and classified with high sensitivity.",

keywords = "AC machines, Capacitance, Dissipation factor, Fault diagnosis, Groundwall (GW) insulation, Insulation resistance (IR), Insulation testing, Online condition monitoring, Phase-to-phase (PP) insulation",

author = "Lee, {Sang Bin} and Jinkyu Yang and Karim Younsi and Bharadwaj, {Raj Mohan}",

note = "Funding Information: Paper IPCSD-06-015, presented at the 2005 Industry Applications Society Annual Meeting, Hong Kong, October 2–6, and approved for publication in the IEEE TRANSACTIONS ON INDUSTRY APPLICATIONS by the Electric Machines Committee of the IEEE Industry Applications Society. Manuscript submitted for review November 3, 2005 and released for publication March 16, 2006. This work was supported by the Korea Electrical Engineering and Science Research Institute (KESRI) under Grant (R-2005-7-043), which is funded by the Ministry of Commerce, Industry, and Energy (MOCIE).",

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volume = "42",

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AU - Lee, Sang Bin

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AU - Younsi, Karim

AU - Bharadwaj, Raj Mohan

N1 - Funding Information: Paper IPCSD-06-015, presented at the 2005 Industry Applications Society Annual Meeting, Hong Kong, October 2–6, and approved for publication in the IEEE TRANSACTIONS ON INDUSTRY APPLICATIONS by the Electric Machines Committee of the IEEE Industry Applications Society. Manuscript submitted for review November 3, 2005 and released for publication March 16, 2006. This work was supported by the Korea Electrical Engineering and Science Research Institute (KESRI) under Grant (R-2005-7-043), which is funded by the Ministry of Commerce, Industry, and Energy (MOCIE).

PY - 2006/7

Y1 - 2006/7

N2 - An online technique for monitoring the condition of the groundwall (GW) and phase-to-phase (PP) insulation for three-phase ac-machine stator windings is proposed in this paper. Insulation-condition indicators such as capacitance, dissipation factor (tan δ), and ac insulation resistance are calculated online based on the differential leakage-current measurements for each phase. A model for a three-phase ac-machine insulation system is derived and analyzed for both offline and online testing. Guidelines for interpreting the measured indicators for determining the: 1) overall condition and 2) significant degradation in the individual GW and PP insulation for each phase of the stator are given based on the analysis. Experimental results on a 15-hp induction motor under intentional GW and PP insulation degradation conditions show that incipient insulation degradation can be detected and classified with high sensitivity.

AB - An online technique for monitoring the condition of the groundwall (GW) and phase-to-phase (PP) insulation for three-phase ac-machine stator windings is proposed in this paper. Insulation-condition indicators such as capacitance, dissipation factor (tan δ), and ac insulation resistance are calculated online based on the differential leakage-current measurements for each phase. A model for a three-phase ac-machine insulation system is derived and analyzed for both offline and online testing. Guidelines for interpreting the measured indicators for determining the: 1) overall condition and 2) significant degradation in the individual GW and PP insulation for each phase of the stator are given based on the analysis. Experimental results on a 15-hp induction motor under intentional GW and PP insulation degradation conditions show that incipient insulation degradation can be detected and classified with high sensitivity.

KW - AC machines

KW - Capacitance

KW - Dissipation factor

KW - Fault diagnosis

KW - Groundwall (GW) insulation

KW - Insulation resistance (IR)

KW - Insulation testing

KW - Online condition monitoring

KW - Phase-to-phase (PP) insulation

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An online groundwall and phase-to-phase insulation quality assessment technique for AC-machine stator windings

Abstract

Keywords

ASJC Scopus subject areas

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