Parameterless earth fault locator algorithm based on transient surges resulting from single-pole breaker opening

Ahmed, Eman S.

doi:10.1016/j.asej.2017.08.002

Cited by 4 publications

(4 citation statements)

References 17 publications

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“…Signal-to-noise ratio (SNR) is defined as follows: SNR = 10.log P s /P n dB (26) where P s is the signal power and P n is the power due to the noise. P s and P n can be defined using the following equations:…”

Section: Synthetic Pq Signals With Noise Real-time Pq Signals and Denoising Schemementioning

confidence: 99%

“…However, this number may vary according to problems in different areas. As an example, the second AD signal‐processing method was proposed to determine the location of short‐circuit faults in transmission lines [26]. Nevertheless, the PQ of the second AD signal‐processing tool was found to be inadequate for segmentation of the disturbances. After the introduction, the single‐level DWT and AD methods are described in Section 2.…”

Section: Introductionmentioning

confidence: 99%

“…However, this number may vary according to problems in different areas. As an example, the second AD signal-processing method was proposed to determine the location of short-circuit faults in transmission lines [26].…”

Section: Introductionmentioning

confidence: 99%

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Approximate‐derivative‐based signal‐processing method to segment power‐quality disturbances

Akmaz

2020

IET Generation, Transmission & Distribution

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The increasing complexity of power systems and the increase in power quality (PQ) data have made it necessary to develop different and simple signal-processing tools. In this study, an approximate-derivative (AD) signal-processing tool based on a simple mathematical processing approach was developed for the segmentation of PQ disturbances. Although the developed method was highly effective for the segmentation of noise-free signals, the method was unable to properly handle the segmentation of noisy signals. Thus, to mitigate this situation, a denoising method based on the Sqtwolog threshold was applied to the noisy signals. After denoising, the proposed AD method effectively performed the segmentation. Subsequently, AD and a single-level discrete wavelet transform (DWT) with Daubechies 4 mother wavelets were compared through simulations, which showed that successful results can be obtained using the proposed method. Furthermore, all simulations showed that the application of AD and single-level DWT to PQ signals under different conditions resulted in similar patterns with different amplitudes. Therefore, this study provides a different approach for analysing signal using single-level DWT.

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Section: Synthetic Pq Signals With Noise Real-time Pq Signals and Denoising Schemementioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Approximate‐derivative‐based signal‐processing method to segment power‐quality disturbances

Akmaz

2020

IET Generation, Transmission & Distribution

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“…Analysis shows that a significant part of the faults are single-phase earth faults, which in most cases turn into multi-phase short circuits, which are disconnected by overcurrent protection [9,18]. The analysis graphs of the number of failures for the specified period (Fig.…”

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confidence: 99%

Improving the efficiency of relay protection at a mining and processing plant

Klyuev

Босиков

Гаврина

2021

PMI

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The paper presents the results of constructing effective relay protection in the power supply system of a mining and processing plant (MPP). A brief description of the MPP is given, the power supply and substitution circuits used to calculate the short-circuit currents are given. A statistical analysis of failures in the electric network of the MPP has been carried out, which makes it possible to draw conclusions about the nature of failures ranges. Analysis of the registered faults shows that a significant part of them are line-to-earth faults, which in most cases turn into multiphase short circuits, which are interrupted by overcurrent protection. In order to improve the efficiency and reliability of the relay protection, the power supply scheme of the MPP was refined and analyzed. The calculation of the short-circuit currents was made, which made it possible to calculate the settings of the relay protection and give recommendations on the place of its installation and adjustment in order to ensure the normal operation of electricity consumers. To reduce the number of failures to the cable insert on the line leaving the administrative and household complex (AHC), and to increase the reliability of power supply to consumers, it is advisable to divide the capacities of the existing 10 kV line into two parallel ones by laying a second line. It is recommended to install a current cut-off on the line outgoing to the AHC, the feasibility of the installation of which was shown by calculations. This will reduce the chance of failures to the cable gland. Data on the setting currents of overcurrent protection and current cut-off are given on the selectivity card.

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Fault location method on two-terminal transmission line using synchronized time information of traveling waves

Akmaz

Mamiş

2021

Electr Eng

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Parameterless earth fault locator algorithm based on transient surges resulting from single-pole breaker opening

Cited by 4 publications

References 17 publications

Approximate‐derivative‐based signal‐processing method to segment power‐quality disturbances

Approximate‐derivative‐based signal‐processing method to segment power‐quality disturbances

Improving the efficiency of relay protection at a mining and processing plant

Fault location method on two-terminal transmission line using synchronized time information of traveling waves

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