Analysis of leakage current on polluted polymer insulator by high resolution spectrum estimation method

Muniraj, C.; Chandrasekar, S.

doi:10.1109/icpws.2009.5442776

Cited by 8 publications

(6 citation statements)

References 5 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…This has led to parametric (Minimum-Norm) spectral estimation, which has proven usefulness in extracting high resolution frequency spectra from relatively short data sets. This method is proved in the in the previous work [15].…”

Section: Introductionmentioning

confidence: 74%

Investigation on Flashover Development Mechanism of Polymeric Insulators by Time Frequency Analysis

Muniraj¹,

Krishnamoorthi²,

Chandrasekar³

2013

Journal of Electrical Engineering and Technology

Self Cite

View full text Add to dashboard Cite

-This paper deals with the analysis of leakage current characteristics of silicone rubber insulator in order to develop a new condition monitoring tool to identify the flashover of outdoor insulators. In this work, laboratory based pollution performance tests are carried out on silicone rubber insulator under ac voltage at different pollution levels and relative humidity conditions with sodium chloride (NaCl) as a contaminant. Min-Norm spectral analysis is adopted to calculate the higher order harmonics and Signal Noise Ratio (SNR). Choi-Williams Distribution (CWD) function is employed to understand the time frequency characteristics of the leakage current signal. Reported results on silicone rubber insulators show that the flashover development process of outdoor polymer insulators could be identified from the higher order harmonics and signal noise ratio values of leakage current signals.

show abstract

Section: Introductionmentioning

confidence: 74%

Investigation on Flashover Development Mechanism of Polymeric Insulators by Time Frequency Analysis

Muniraj¹,

Krishnamoorthi²,

Chandrasekar³

2013

Journal of Electrical Engineering and Technology

Self Cite

View full text Add to dashboard Cite

show abstract

“…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%

“…Compared with porcelain and glass, it is well known that polymers are more readily damaged by degradation initiated from dry band arcing. Many researchers [1,3,[5][6][7][8] have used the same approach to study ceramic and non-ceramic insulators without distinction regarding the material of the insulator.…”

Section: Introductionmentioning

confidence: 99%

“…Several techniques have been applied on LC measurements; these fall under these general categories [2]: (i) Time-domain methods applied to the electrical values, such as the peak value, phase shift, accumulated charge, V-I plot characteristics, correlation and auto-correlation functions [1,2,7,16]. (ii) Frequency methods including the harmonic content, the fast Fourier transform (FFT) method, the power spectrum and the wavelet method [1,5,8,9,10,17,18]. (iii) Pattern recognition methods with techniques and tools, such as ANNs (artificial neural networks), statistical pattern recognition and recurrent analysis [1,11,14,17].…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

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

View full text Add to dashboard Cite

“…There are some ongoing studies presented about determination surface condition by monitoring leakage signals [8][9][10][11]. Surface tracking leads to total breakdown which is initiated by tracking currents which are highly disturbing.…”

Section: Introductionmentioning

confidence: 99%

Investigation of Degradative Signals on Outdoor Solid Insulators Using Continuous Wavelet Transform

Uzunoğlu¹

2016

Journal of Electrical Engineering and Technology

View full text Add to dashboard Cite

-Most outdoor solid insulators may suffer from surface degradations due to non-stationary currents that flow on the insulator surface. These currents may be classified as leakage, discharge and tracking currents due to their disturbing potencies respectively. The magnitude of these currents depends on the degree of the contamination of surface. The leakage signals are followed by discharge signals and tracking signals which are capable of forming carbonized tracking paths on the surface between high voltage and earth contacts (surface tracking). Surface tracking is one of the most breakdown mechanisms observed on the solid insulators, especially polymers which may cause severely reduced lifetime. In this study the degradations observed on polyester resin based insulators are investigated according to the IEC 587 Inclined Plane Test Standard. The signals are monitored and recorded during tests until surface tracking initiated. In order to prevent total breakdown of an insulator, early detection of tracking signals is vital. Continuous Wavelet Transform (CWT) is proposed for classification of signals and their energy levels observed on the surface. The application of CWT for processing and classification of the surface signals which are prone to display high frequency oscillations can facilitate real time monitoring of the system for diagnosis.

show abstract

Analysis of leakage current on polluted polymer insulator by high resolution spectrum estimation method

Cited by 8 publications

References 5 publications

Investigation on Flashover Development Mechanism of Polymeric Insulators by Time Frequency Analysis

Investigation on Flashover Development Mechanism of Polymeric Insulators by Time Frequency Analysis

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

Investigation of Degradative Signals on Outdoor Solid Insulators Using Continuous Wavelet Transform

Contact Info

Product

Resources

About