A comparative study on leakage current harmonics of porcelain disc insulator contaminated with NaCl and KCl

Banik, Apu; Pradhan, A. K.; Ghosh, Riddhi; Dalai, Sovan; Chaterjee, B.

doi:10.1109/icpden.2015.7084496

Cited by 9 publications

(7 citation statements)

References 6 publications

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“…But in reality, various types of soluble as well as non soluble salts can deposit on the surface of the insulator which may lead to complete different characteristics of leakage current. In [5][6] it was reported that the harmonic contents and flashover voltages both change with the nature of the salt deposition on the insulator surface.…”

Section: Introductionmentioning

confidence: 99%

Identification of salt and salinity level of 11kV contaminated porcelian disc insulator using STD-MRA analysis of leakage current

Chatterjee

Banik

Dalai

et al. 2015

2015 International Conference on Condition Assessment Techniques in Electrical Systems (CATCON)

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In the present work, a scheme has been developed based on standard deviation of multi resolution analysis (STD-MRA) plot of surface leakage current of a 11kV porcelain disc insulator artificially contaminated with NaCl and KCl. Leakage current analysis is perhaps the most efficient method to analyze the condition of insulator surface. For this purpose, a 11kV porcelain disc insulator is artificially contaminated in the laboratory by applying two soluble salts NaCl and KCl using solid layer method. Two salinity levels 0.5 and 1.5 indicating two different pollution levels are achieved by mixing NaCl and KCl individually with kaolin in distilled water and the leakage current is measured at three voltage levels of 5kV, 15kV and 30kV. The measured leakage currents are decomposed using wavelet transform and the standard deviation of the details are computed for each mentioned salinity levels at 5kV, 15kV and 30kV, respectively. From the above analysis, it is possible to identify the salinity level as well as the type of soluble salt (NaCl or KCl) deposition on the insulator surface which may be useful for condition monitoring of outdoor insulators.

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Section: Introductionmentioning

confidence: 99%

Identification of salt and salinity level of 11kV contaminated porcelian disc insulator using STD-MRA analysis of leakage current

Chatterjee

Banik

Dalai

et al. 2015

2015 International Conference on Condition Assessment Techniques in Electrical Systems (CATCON)

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“…For artificial contamination, SLM has been chosen to contaminate the insulator surface [22][23][24]. It is possible to produce an approximately uniform contamination layer by this method.…”

Section: Contamination On Insulatormentioning

confidence: 99%

“…However, existing literatures show that, sinusoidal excitation voltage is applied to the insulator for assessing its condition [5][6][7][8][9][10][11][12][13]. Moreover, the harmonic contents of the surface leakage current are found to change with contamination level and applied voltage [8][9][10][11][12][21][22][23]. This is a clear indication that the insulator system is non-linear in nature and hence a non-linear model of insulator definitely exists.…”

Section: Introductionmentioning

confidence: 99%

“…An experimental setup for measurement of leakage current is prepared in the laboratory. The insulator under test is 11 kV porcelain disc insulator artificially contaminated in the laboratory using solid layer method (SLM) [21][22][23][24]. Five different levels of equivalent salt deposition density (ESDD) corresponding to different pollution levels are achieved and the surface leakage current at each pollution level is measured at five different voltage levels.…”

Section: Introductionmentioning

confidence: 99%

“…The measurement is started from 5 kV and the voltage is slowly increased up to 30 kV in steps of 5 kV. Since the measured leakage current is found to be non-sinusoidal in nature, the harmonic components are extracted using fast Fourier transform (FFT) [7,22].…”

Section: Introductionmentioning

confidence: 99%

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A crest factor-based technique for the analysis of polluted insulator leakage current under harmonically distorted supply voltage

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A comparative study on leakage current harmonics of porcelain disc insulator contaminated with NaCl and KCl

Cited by 9 publications

References 6 publications

Identification of salt and salinity level of 11kV contaminated porcelian disc insulator using STD-MRA analysis of leakage current

Identification of salt and salinity level of 11kV contaminated porcelian disc insulator using STD-MRA analysis of leakage current

Condition assessment of outdoor porcelain insulator based on dielectric dissipation factor evaluated from non‐linear equivalent circuit

A crest factor-based technique for the analysis of polluted insulator leakage current under harmonically distorted supply voltage

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