Investigation and classification of field leakage current waveforms

Pylarinos, D.; Theofilatos, Konstantinos; Siderakis, K.; Thalassinakis, E.; Vitellas, I.; Alexandridis, Antonio T.; Pyrgioti, E.

doi:10.1109/tdei.2012.6396971

Cited by 29 publications

(22 citation statements)

References 28 publications

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“…On the other side it should be mentioned that surface leakage current flows on the surface of insulation or in endwinding [43,44]. The amount of this current is constant but increases when temperature and humidity increase.…”

Section: Influence Of Temperature Variationmentioning

confidence: 99%

Influence of ambient and test conditions on insulation resistance/polarization index in hv electrical machines - a survey

Torkaman

Karimi

2015

IEEE Trans. Dielect. Electr. Insul.

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Ambient and test conditions can affect the analysis results of the insulation system testing in high voltage (HV) electrical machines. In this context, insulation resistance (IR) and polarization index (PI) are two common techniques for winding insulation assessment in offline mode. This paper investigates the influence of main parameters that affects IR/PI tests results. Temperature, humidity, and pressure are the wellknown environmental parameters which could affect dielectric parameters of insulation such as IR and PI. On the other side, test voltage level and voltage polarities connections are two prominent factors in sampling the resistance during the test. Moreover, the insulation resistance value depends on the type of fault and its severity. The variations of insulation resistance with considering the mentioned parameters are evaluated in this paper, to study the possible correlation between IR/PI and changes in other parameters. It was found that with taking the effective parameters into account, the accurate and reliable insulation test interpretation can be achieved in HV electrical machines. A comprehensive review of literature was done and industry experts were surveyed for their ideas and experience under a research project. The main results are summarized in this paper.

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Section: Influence Of Temperature Variationmentioning

confidence: 99%

Influence of ambient and test conditions on insulation resistance/polarization index in hv electrical machines - a survey

Torkaman

Karimi

2015

IEEE Trans. Dielect. Electr. Insul.

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show abstract

“…In [16] the characteristics of LC has been investigated based on the waveforms and frequency characteristics of LC on an artificially ceramic polluted insulator. In [17] field LC waveforms such as the occurrence of spikes sinusoids of exceptionally large amplitude and sudden amplitude were recorded and proposed techniques to increase the efficiency of the LC monitoring technique. Other studies have been investigated the magnitude waveform and THD of LC in ceramic and polymeric insulators [18].…”

Section: Introductionmentioning

confidence: 99%

Leakage current analysis of polymeric insulators under uniform and non‐uniform pollution conditions

Ahmadi-Joneidi

Akmal

Mohseni

2017

IET Generation, Transmission & Distribution

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“…The measurement of the leakage current (LC) is widely used as a tool to monitor and to investigate the insulator state in polluted areas, the surface electrical activity (partial discharges, arcs and flashovers) and overall the performances of insulators of various high voltage equipments whether in lab or outdoor conditions [1][2][3][4][5][6][7][8][9][10][11]. Thus, the knowledge of the LC flowing through a given insulator surface provides information about the pollution severity of insulator and flashover.…”

Section: Introductionmentioning

confidence: 99%

Time–frequency analyses of leakage current waveforms of high voltage insulators in uniform and non‐uniform polluted conditions

Dhahbi-Megriche

Béroual

2015

IET Science, Measurement & Technology

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Investigation and classification of field leakage current waveforms

Cited by 29 publications

References 28 publications

Influence of ambient and test conditions on insulation resistance/polarization index in hv electrical machines - a survey

Influence of ambient and test conditions on insulation resistance/polarization index in hv electrical machines - a survey

Leakage current analysis of polymeric insulators under uniform and non‐uniform pollution conditions

Time–frequency analyses of leakage current waveforms of high voltage insulators in uniform and non‐uniform polluted conditions

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