Impact of noise related waveforms on long term field leakage current measurements

Pylarinos, D.; Siderakis, K.; Pyrgioti, E.; Thalassinakis, E.; Vitellas, I.

doi:10.1109/tdei.2011.5704501

Cited by 22 publications

(18 citation statements)

References 25 publications

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“…Calculating the correlation coefficient using the data ac quired in the experiment suggests that the correlation coef ficient is not sensitive to typical insulator noises consisting of random number of minor peaks in low amplitudes [15]. Therefore, it avoids preprocessing of the data by filtering the noise which induces information loss.…”

Section: Defining the Nonlinearity Measurementioning

confidence: 99%

Characterizing leakage current on polluted insulators by measuring nonlinearity

Sokolowski

et al. 2014

2014 IEEE 23rd International Symposium on Industrial Electronics (ISIE)

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A new approach based on a nonlinearity measure to study the leakage current signature is proposed. Using this approach profiles for clean insulators, contaminated insulators with various contamination levels in dry and wet conditions are established. The nonlinearity measure captures a range of magnitudes for leakage currents exhibiting different signatures. The insulator nonlinearity measure decreases when the insulator is either wetted, contaminated or both wetted and contaminated. The change in this measure is significant in identifying the 'health state' of contaminated insulators and in flashover prediction, especially since contamination is one of the main causes of insulator failure, which thereafter may cause power system outages and threaten life. Further, this approach has the added advantage of application in identifying other types of disturbance waveforms which model-based and spectrum analysis methods lack.

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Section: Defining the Nonlinearity Measurementioning

confidence: 99%

Characterizing leakage current on polluted insulators by measuring nonlinearity

Sokolowski

et al. 2014

2014 IEEE 23rd International Symposium on Industrial Electronics (ISIE)

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“…Typical noise (noise which is always present) consists of random minor peaks that exhibit amplitude in the range of 1mA, as illustrated in Figure 8A and Figure 8B. That means that measurements in the typical noise area are usually incoherent and that, since meagre or no activity is the usual case, a large number of typical noise waveforms are recorded [9]. Single point noise results to a single point recorded far from the rest of the waveform.…”

Section: Wwwetasrcom Pylarinos Et Al: Investigation Of Lc Waveforms Recorded In a Coastal Hv Substationmentioning

confidence: 99%

“…The acquired data are transmitted to a central data acquisition system (DAS). The waveform portraying the highest LC peak value in a user-defined time window is recorded [9]. Each waveform has time duration of 480ms.…”

Section: Experimental Set Upmentioning

confidence: 99%

“…FIELD NOISE Limited access, long term monitoring and field conditions result to a variety of noise related waveforms. Investigation of the recorded waveforms lead to the identification of three different types of noise: Typical Noise, Dysfunction Generated Noise and Single Point Noise [9]. Typical noise (noise which is always present) consists of random minor peaks that exhibit amplitude in the range of 1mA, as illustrated in Figure 8A and Figure 8B.…”

Section: Wwwetasrcom Pylarinos Et Al: Investigation Of Lc Waveforms Recorded In a Coastal Hv Substationmentioning

confidence: 99%

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Investigation of Leakage Current Waveforms Recorded in a Coastal High Voltage Substation

Pylarinos

Siderakis

Pyrgioti

et al. 2011

Eng. Technol. Appl. Sci. Res.

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Leakage current monitoring is a widely employed technique to monitor the performance of outdoor insulation. The evaluation of leakage current waveforms recorded in the field, offers significant information since insulation’s performance is strongly linked with local conditions, and the waveforms’ shape correlate to different types of surface activity. In this paper, an investigation of leakage current waveforms recorded in a 150 kV coastal Substations suffering which suffers intense marine pollution is presented. Investigation of the recorded waveforms verified the basic waveform shapes described in the literature. Further, several variations of the basic types and complex waveforms, as well as field related waveforms, are presented. The need for added categorization criteria in the case of field measurements is discussed.

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“…Several extracted values are commonly used [5] and advanced pattern recognition techniques have also been proposed [6][7]. Further, the size of the gathered data [8] and noise is always an issue [9]. Therefore, a leakage current monitoring system should be as flexible as possible in order to cope with different testing scenarios and to be able to incorporate future processing techniques.…”

Section: Introductionmentioning

confidence: 99%

A Labview Based Leakage Current Monitoring System For HV Insulators

Mavrikakis¹,

Androulidakis²,

Pylarinos³

et al. 2015

JESTR

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In this paper, a Labview based leakage current monitoring system for High Voltage insulators is described. The system uses a general purpose DAQ system with the addition of different current sensors. The DAQ system consists of a chassis and hot-swappable modules. Through the proper design of current sensors, low cost modules operating with a suitable input range can be employed. Fully customizable software can be developed using Labview, allowing on-demand changes and incorporation of upgrades. Such a system provides a low cost alternative to specially designed equipment with the added advantage of maximum flexibility. Further, it can be modified to satisfy the specifications (technical and economical) set under different scenarios. In fact, the system described in this paper has already been installed in the HV Lab of the TEI of Crete whereas a variation of it is currently in use in TALOS High Voltage Test Station.

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Impact of noise related waveforms on long term field leakage current measurements

Cited by 22 publications

References 25 publications

Characterizing leakage current on polluted insulators by measuring nonlinearity

Characterizing leakage current on polluted insulators by measuring nonlinearity

Investigation of Leakage Current Waveforms Recorded in a Coastal High Voltage Substation

A Labview Based Leakage Current Monitoring System For HV Insulators

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