Wavelet Transforms Based Power Transformer Protection from Magnetic Inrush Current

Soundiraraju, P.; Loganathan, N.

doi:10.11591/telkomnika.v14i3.7849

Cited by 4 publications

(3 citation statements)

References 12 publications

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“…In another way, the high frequencies are also cut into sub-bands and the decomposition tree deviate symmetrically. The wavelet packets decomposition leads to a decomposition into frequency sub-bands of the signal [9]- [11].…”

Section: The Wavelet Packet Transformmentioning

confidence: 99%

Packets Wavelets and Stockwell Transform Analysis of Femoral Doppler Ultrasound Signals

Latfaoui¹,

Reguig²

2018

IJECE

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Ultrasonic Doppler signals are widely used in the detection of cardiovascular pathologies or the evaluation of the degree of stenosis in the femoral arteries. The presence of stenosis can be indicated by disturbing the blood flow in the femoral arteries, causing spectral broadening of the Doppler signal. To analyze these types of signals and determine stenosis index, a number of time-frequency methods have been developed, such as the short-time Fourier transform, the continuous wavelets transform, the wavelet packet transform, and the S-transform.

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Section: The Wavelet Packet Transformmentioning

confidence: 99%

Packets Wavelets and Stockwell Transform Analysis of Femoral Doppler Ultrasound Signals

Latfaoui¹,

Reguig²

2018

IJECE

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“…Insulation plays a prominent role in high voltage systems such as rotating machines, power capacitors, power transformers, switchgears, circuit breakers and power cables to ensure that the systems are in best performance. The lifespan of high voltage systems is heavily dependent on the reliability of the insulation of the systems and this includes the insulation materials [1]- [3]. The insulation media used in high voltage systems can be generally classified as solids, liquids and gases.…”

Section: Introductionmentioning

confidence: 99%

Comparative Study on the AC Brekadown Voltage of Palm Fatty Acid Ester Insulation Oils Mixed With Iron Oxide Nanoparticles

Mohamad

Zainuddin

Ghani

et al. 2016

IJECE

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Mineral oils are are derived from petroleum which is a non-renewable and non-sustainable source, and therefore there is a critical need to develop alternative insulation oils for use in transformers. Ester oils offer a number of benefits over mineral oils such as good biodegradability, high cooling stability, good oxidation stability and excellent insulation performance. Nowadays, nanotechnology has become one of the most important research fields in both the academia and industry and it has been shown in previous studies that nanoscale materials are beneficial for transformers. In this regard, the objective of this study is to compare the AC breakdown voltage of palm fatty acid ester (PFAE) oils mixed with iron oxide (Fe3O4) nanoparticles. The PFAE-based nanofluids are prepared using two methods: (1) Method I (weight-based method whereby the concentration of the Fe3O4 nanoparticles is 0.01 g/l) and (2) Method II (volume-fraction method whereby the concentration of the Fe3O4 nanoparticles is 0.01, 0.02 and 0.03%). The AC breakdown voltage test is conducted on the PFAE-based nanofluids in accordance with the ASTM D1816 standard test method. Weibull statistical analysis is carried out to analyse the AC breakdown voltage of fresh PFAE oil and PFAE-based nanofluids. It is found that there is enhancement of the AC breakdown voltage for all PFAE-based nanofluids with the exception of with the exception of one sample prepared using Method II (0.01% Fe3O4 nanoparticles).

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“…In this view point, this is important to achieve a model for transformer which can justify its behaviour in fault conditions. Winding-to-winding faults are also produced by reasons like mechanical force due to a mechanical connection in transformer, winding insulation destruction caused by continuous overload and transformer insulation breakdown due to an impulse voltage, or combination of all the mentioned reasons [2][3], [27].…”

Section: Introductionmentioning

confidence: 99%

Modeling of Magnetizing Inrush and Internal Faults for Three-phase Transformers

Bakhshipour

Namdari

Sedaghat

2016

IJEECS

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Wavelet Transforms Based Power Transformer Protection from Magnetic Inrush Current

Cited by 4 publications

References 12 publications

Packets Wavelets and Stockwell Transform Analysis of Femoral Doppler Ultrasound Signals

Packets Wavelets and Stockwell Transform Analysis of Femoral Doppler Ultrasound Signals

Comparative Study on the AC Brekadown Voltage of Palm Fatty Acid Ester Insulation Oils Mixed With Iron Oxide Nanoparticles

Modeling of Magnetizing Inrush and Internal Faults for Three-phase Transformers

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