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Journal ArticleDOI

Phase-time analysis of the leakage impulse current of faulty line-post pin insulators

14 Jan 2003-IEEE Transactions on Power Delivery (IEEE)-Vol. 18, Iss: 1, pp 323-328
TL;DR: In this article, the leakage impulse current of the faulty insulators was experimentally studied, and the authors showed that leakage impulse is observed only in a distinct location in phase-time space, which could be used for status monitoring of insulators and distribution feeders.
Abstract: Leakage impulse current of the faulty insulators was experimentally studied. The leakage impulse current was characterized in terms of the phase-time base of the applied voltage. The study showed that the leakage impulse is observed only in a distinct location in phase-time space. Based on the findings, prioritized maintenance scheduling was proposed, which could be used for status monitoring of insulators and distribution feeders.

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Citations
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Journal ArticleDOI
12 Oct 2003
TL;DR: In this article, a systematic and cumulative statistical approach for identifying symptom parameters of incipient faults in distribution feeders is proposed, which aims at providing a tool for evaluating and identifying the best and highly correlated parameters to the faults so that they could be used for incipient fault detection and feeder condition monitoring.
Abstract: This paper focuses on a systematic and cumulative statistical approach for identifying symptom parameters of incipient faults in distribution feeders. The proposed method aims at providing a tool for evaluating and identifying the best and highly correlated parameters to the faults so that they could be used for incipient fault detection and feeder condition monitoring. The Laplace test statistic is adopted for trend analysis of the event log of candidate parameters and applied to actual feeder event data for online detection and monitoring purposes.

36 citations

01 Jan 2004
TL;DR: In this article, a systematic and cumulative statistical approach for identifying symptom parameters of incipient faults in distribution feeders is proposed, which aims at providing a tool for evaluating and identifying the best and highly correlated parameters to the faults so that they could be used for incipient fault detection and feeder condition monitoring.
Abstract: This paper focuses on a systematic and cumulative statistical approach for identifying symptom parameters of incip- ient faults in distribution feeders. The proposed method aims at providing a tool for evaluating and identifying the best and highly correlated parameters to the faults so that they could be used for incipient fault detection and feeder condition monitoring. The Laplace test statistic is adopted for trend analysis of the event log of candidate parameters and applied to actual feeder event data for online detection and monitoring purposes. Index Terms—Condition monitoring, hazard function, incipient fault, Laplace test statistic, trend analysis.

19 citations

References
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Book
01 Mar 1990
TL;DR: In this paper, the authors collected this knowledge and presented it as a coherent study, including the behaviour detection and measurement of discharges, the choice of detection method and procedure, the location of discharging and discharge detection in practice.
Abstract: Electrical discharges that do not completely bridge the electrodes are called partial discharges Although small, these discharges have been known for more than fifty years to cause progressive deterioration Since 1945 the use of new high voltage dielectrics has required the use of sophisticated detection techniques Discharge detection has grown into an indispensible tool for the evaluation of modern insulation The subject has received little attention in books on high voltage techniques although a good deal is scattered in various papers and reports The object of this book is to collect this knowledge and present it as a coherent study Topics covered include the behaviour detection and measurement of discharges, the choice of detection method and procedure, the location of discharges and discharge detection in practice

384 citations

Journal ArticleDOI
TL;DR: In this article, a feasibility study on the characterization of incipient insulator failure for distribution fault prediction is presented, where real distribution data was collected and analyzed to isolate incipient failure signatures or parameters which were expected to show distinct behaviors before and after failure incident.
Abstract: A feasibility study on the characterization of incipient insulator failure for distribution fault prediction is presented. In this study, real distribution data was collected and analyzed to isolate incipient failure signatures or parameters which were expected to show distinct behaviors before and after failure incident. Several signal analysis methods were applied to isolate the parameters and a new strategy of analysis, the event-date concept, was also applied to find a relationship between nonharmonic and high frequency signal activities and imminent insulator failures.

26 citations


"Phase-time analysis of the leakage ..." refers background in this paper

  • ...The first part was devoted to the macroscopic and statistical analysis [4]....

    [...]

DOI
01 Mar 1986
TL;DR: In this paper, the leakage current drawn by an insulator chain of a power line in a polluted atmosphere is detected by a novel current transformer arrangement, whose amplitude exceeds a critical level, occurring over a preset period.
Abstract: Apparatus is developed for monitoring the leakage current drawn by an insulator chain of a power line in a polluted atmosphere. The apparatus senses the leakage current bursts by a novel current transformer arrangement. The apparatus counts the number of bursts, whose amplitude exceeds a critical level, occurring over a preset period. If this number reaches a critical value corresponding to a potentially dangerous intensity of the insulator pollution, the apparatus transmits an alarm signal to the service crew so that they would thus clean the power line insulators in time before a sudden line outage occurs, with the entailed excessive expense, loss of power supply and annoyance to customers. Line insulator cleaning is thus carried out only when necessary, which adds to the economy of the power system operation. The apparatus was designed, built and is currently being tested in the high voltage laboratory of Cairo University. Experience with it on actual power networks will be the subject of another paper.

13 citations


"Phase-time analysis of the leakage ..." refers background in this paper

  • ...developed a transformer arrangement for monitoring leakage levels of an insulator chain [2]....

    [...]