Continuous wavelet transform for ferroresonance phenomena in electric power systems

Akıncı, Tahir Çetin; Ekren, Nazmi; Şeker, Serhat; Yildirim, Sezen

doi:10.1016/j.ijepes.2012.07.001

Cited by 39 publications

(23 citation statements)

References 13 publications

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“…The STFT approach is an alternative method based on the classic Fourier Transformation used in the analysis of dynamic data (Vaseghi, 1996;Akinci et al, 2009;Onal and Dikun, 2013).…”

Section: The Time-frequency Analysis Methodsmentioning

confidence: 99%

See 1 more Smart Citation

The determination of short circuits and grounding faults in electric power systems using time-frequency analysis

Esen¹,

Oral²,

Akıncı³

2017

J. energy South. Afr.

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“…The STFT approach is an alternative method based on the classic Fourier Transformation used in the analysis of dynamic data (Vaseghi, 1996;Akinci et al, 2009;Onal and Dikun, 2013).…”

Section: The Time-frequency Analysis Methodsmentioning

confidence: 99%

“…The faults may occur for various reasons. These faults can be analysed through conventional methods as well as modern sign processing methods (Akinci et al, 2013). Sign processing methods provide successful results through the analysis of the fault in the frequency domain.…”

Section: Introductionmentioning

confidence: 99%

The determination of short circuits and grounding faults in electric power systems using time-frequency analysis

Esen¹,

Oral²,

Akıncı³

2017

J. energy South. Afr.

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“…The angle difference indicated that there was an SLG fault at feeder 1. The voltage and current signals were pre-conditioned using a second-order Butterworth low-pass filter, and a discrete Fourier transform (DFT) was used to estimate the phasors [37,38]. As shown in Figure 15, the zero-sequence-voltage and zero-sequence current at the primary winding of the step-down transformer indicated that a grid fault occurred at position 1.…”

Section: System Components Parametersmentioning

confidence: 99%

A Novel Protection Method for Single Line-to-Ground Faults in Ungrounded Low-Inertia Microgrids

et al. 2016

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This paper proposes a novel protection method for single line-to-ground (SLG) faults in ungrounded low-inertia microgrids. The proposed method includes microgrid interface protection and unit protection. The microgrid interface protection is based on the difference between the zero-sequence voltage angle and the zero-sequence current angle at the microgrid interconnection transformer for fast selection of the faulty feeder. The microgrid unit protection is based on a comparison of the three zero-sequence current phase directions at each junction point of load or distributed energy resources. Methods are also included to locate the minimum fault section. The fault section location technology operates according to the coordination of microgrid unit protection. The proposed method responds to SLG faults that may occur in both the grid and the microgrid. Simulations of an ungrounded low-inertia microgrid with a relay model were carried out using Power System Computer Aided Design (PSCAD)/Electromagnetic Transients including DC (EMTDC).

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“…The ferroresonant conditions generally occur when the system is unbalanced, like switching or the serial connections of the capacitors with transformer magnetizing impedance. This situation causes failures in transformers, cables, and arresters as well as overvoltages [1][2][3][4][5][6][7][8][9][10][11][12][13]. The ferroresonance phenomenon is more prevalent at high voltage levels since the relative ratios of losses, magnetizing impedance and cable capacitance fall into their more favorable ranges here [7,8,10].…”

mentioning

confidence: 99%

“…In addition, the abnormal rates of harmonics can often be dangerous for most electrical equipment in power systems. Therefore, in the related literature, the ferroresonance phenomenon is defined as a general term, which is applied to a wide variety of the interactions between capacitors and iron-core inductors [1][2][3][4][5][6][7][8][9][10][11][12][13][14][15][16][17][18].…”

mentioning

confidence: 99%

Spectral and statistical analysis for ferroresonance phenomenon in electric power systems

2011

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This study presents our findings on the ferroresonance phenomenon for the Seyitomer-Isiklar part of the Electric Power System of 380 kV in Turkey. In this context, the power spectral density approach and Short-Time Fourier Transforms are applied to the voltage variations for phase R of the sample power network. The findings show that the ferroresonance event can be represented by the interharmonics between 50 and 250 Hz, as well as statistical properties. In addition, a histogram of the ferroresonance region shows a different characteristic from the overall data and the nonferroresonance region. This different characteristic can be defined by an asymmetrical distribution characteristic, and its numerical measure is given by the "Noise to Signal Ratio" of 0.624.

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Continuous wavelet transform for ferroresonance phenomena in electric power systems

Cited by 39 publications

References 13 publications

The determination of short circuits and grounding faults in electric power systems using time-frequency analysis

The determination of short circuits and grounding faults in electric power systems using time-frequency analysis

A Novel Protection Method for Single Line-to-Ground Faults in Ungrounded Low-Inertia Microgrids

Spectral and statistical analysis for ferroresonance phenomenon in electric power systems

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