Polymeric insulation surface condition analysis using linear time frequency distributions

Norddin, Nurbahirah; Abdullah, Abdul Rahim; Abidin, N. Q. Zainal; Aman, Azana Hafizah Mohd; Ramani, Anis Niza

doi:10.1109/peoco.2013.6564610

Cited by 5 publications

(3 citation statements)

References 13 publications

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“…There are many well-established techniques for LC analysis, including the FT [Suda (2005)] -Suda investigated the frequency characteristics of LC waveforms through FFT and classified them into six stages to predict flashover; STFT [Gao et al (2006)] and spectrogram [Norddin et al (2013)] -Norddin et al discussed the S-transform and spectrogram, and concluded that higher contents of harmonics will indicate the severity of the LC waveform distortion; and the WT [Moula et al (2013)] -Moula adopted the DWT for LC decomposition and demonstrated that a simultaneous increase in the standard deviation of the specific components indicates the presence of partial arcs. Unfortunately, each of these techniques has its own limitations when working with these nonstationary and nonlinear signals, which are influenced by several factors, including climate, voltage and material factors.…”

Section: Simulations and Real Data Analysismentioning

confidence: 99%

On the EMD Sifting Property and Instantaneous Parameters

Zhao

Liu

Wang

et al. 2016

Adv. Data Sci. Adapt. Data Anal.

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Recently proposed Hilbert-Huang transform (HHT), consisting of empirical mode decomposition (EMD) and Hilbert spectrum analysis (HSA), has been proved to be an effective approach in both scientific researches and engineering applications. However, this method is still empirical because of lacking rigorously mathematical foundation. This paper primarily focuses on providing a mathematical contribution on its sifting characteristics and instantaneous features. Firstly, the theory of the original methods as well as their advantages and restrictions are briefly reviewed. Secondly, we conduct indepth investigations of the instantaneous parameters (IPs) and sifting ability. Thirdly, we proposed a new EMD stopping criterion, determined an optimal number of sifting iterations, employed a new masking signal to fix the mode mixing problem and investigated into the sifting property according to the extremum distribution. Finally, comparative studies, simulations and real data analyses depending on the proposed method are presented to demonstrate the validity of the novel research. The simulations illustrate that the typically defined intrinsic mode functions (IMFs) are not perfectly symmetric with zero-mean, there is still no rigorous mathematical standard to determine the "watershed" between mono and multi-component IMFs. The comparative researches indicate that unlike the prism property of the Fourier transform (FT) and the mathematical microscope property of the wavelet transform (WT), the ultimate goal of the HHT is to work as raindrops.

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Section: Simulations and Real Data Analysismentioning

confidence: 99%

On the EMD Sifting Property and Instantaneous Parameters

Zhao

Liu

Wang

et al. 2016

Adv. Data Sci. Adapt. Data Anal.

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“…The analysis technique is motivated by the limitation of Fast Fourier Transform (FFT) to cater non-stationary signals whose spectral characteristic change in time. Spectogram can be defined as [9]:…”

Section: Lead Acid Batterymentioning

confidence: 99%

Lead Acid Battery Analysis Using Spectogram <sup></sup>

Kasim

Abdullah

Selamat

et al. 2015

AMM

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Renewable energy is an alternative option that can be substituted for future energy demand. Many type of battery are used in commerce to propel portable power and this makes the task of selecting the right battery type is crucial. This paper presents the analysis of voltage charging and discharging for lead acid battery using time-frequency distribution (TFD) which is spectrogram. Spectogram technique is used to represent the signals in the time-frequency representation (TFR). The parameter of a signal such as instantaneous root mean square (RMS) voltage, direct current voltage (VDC) and alternating current voltage (VAC) are estimated from the TFR to identify the signal characteristics. This analysis, focus on lead-acid battery with nominal battery voltage of 6 and 12V and storage capacity from 5 until 50Ah. The battery is a model using MATLAB/SIMULINK and the results show that spectrogram technique is capable to identify and determine the signal characteristic of Lead Acid battery.

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“…Meanwhile, polymeric insulators are worldwide used for outdoor applications due to its better characteristic than porcelain and glass (Marungsri, Onchantiek and Oonsivilai, 2008) (Jamail, Piah, Muhamad, Zainir, Kasri, and Kamarudin, 2013). The main advantages of polymeric insulators over porcelain and glass insulators are lightweight, durable, and maintain hydrophobic surface properties (Norddin et al, 2013). Although the polymeric is lightweight and durable, it is also undeniable that the surface of polymeric is often exposed to the surrounding especially contamination source which can affect the polymeric performance (Looms and Chapman, 1991) (Moussavi, Sheikhdoragh and Shayegani-Akmal, 2012).…”

Section: Introductionmentioning

confidence: 99%

Surface Conditions Analysis of Polymeric Insulators Under Contamination Effects

Rozi

Othman

Adzis

et al. 2020

IJIE

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A good polymer insulator can maintain the hydrophobic surface properties. However, polymer insulator is exposed to the environment which may lead to the deposition of rain water or factory oil. Oil is categorized as hydrophobic while water has a hydrophilic feature which when deposit on the insulator surface, it may affect the performance of insulator. Therefore, this paper studies the effect of water and oil contamination on current density and space charge distribution along 15 kV polymeric insulators particularly ethylene propylene-diene monomer (EPDM) and silicone rubber (SiR). A three-dimensional model of polymeric insulator was designed using a finite element software to evaluate the current density and space charge distribution while the experimental works was conducted in the laboratory to measure the charge distribution only. The results reveal that both current density and charge distribution is affected depend on the conductivity of contamination conditions. Both results extracted from simulation and experimental is in agreement where the EPDM insulator have higher amplitude of charge compared to SiR insulator.

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Polymeric insulation surface condition analysis using linear time frequency distributions

Cited by 5 publications

References 13 publications

On the EMD Sifting Property and Instantaneous Parameters

On the EMD Sifting Property and Instantaneous Parameters

Lead Acid Battery Analysis Using Spectogram <sup></sup>

Surface Conditions Analysis of Polymeric Insulators Under Contamination Effects

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