Single-Point Methods for Location of Distortion, Unbalance, Voltage Fluctuation and Dips Sources in a Power System

Hanzelka, Zbigniew; Słupski, Piotr; Piątek, Krzysztof; Warecki, Jurij; Zieliński, Maciej

doi:10.5772/16410

Cited by 14 publications

(5 citation statements)

References 36 publications

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“…The results for all cases considered are shown in Tables 6-9. The individual tables present the simulation and experimental results (shown in brackets) of the proposed approach and compare them with other exemplary methods of identifying sources of voltage fluctuation using the statistical analysis of the rms value changes δV [16][17][18]45] or the value of the shortterm flicker indicator P st [24,25,46], which are currently used in real power grids to locate disturbing sources. Bold font with a grey background indicates the supply point of the disturbing load, which was determined using the proposed approach (columns f i and A i ) and the currently used methods (columns P st and δV max , where δV max is the maximum change in the rms value of voltage in the period of discrimination).…”

Section: Verification Of the Algorithm For Selective Identification And Localization Of Voltage Fluctuation Sourcesmentioning

confidence: 99%

“…In this case, there is a need to identify disturbing loads in the power grid. Single-point methods for the identification of sources of disturbances are dominant in the literature (e.g., methods using analysis of interharmonic power direction [24]; analysis of the correlation of changes in the flicker severity and/or changes in the active and reactive power [25]; analysis of voltage/current harmonics [26]; analysis of the power of voltage fluctuations [21]; or analysis of active power changes [22]). However, in most cases, single-point methods only allow for one side (the power consumer or power supplier) to be determined at the point of common coupling, which is the main source of disturbance.…”

Section: Introductionmentioning

confidence: 99%

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Selective Identification and Localization of Voltage Fluctuation Sources in Power Grids

Kuwałek¹

2021

Energies

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The current study presents a novel approach to the selective identification and localization of voltage fluctuation sources in power grids, considering individual disturbing loads changing their state with a frequency of up to 150 Hz. The implementation of the proposed approach in the existing infrastructure of smart metering allows for the identification and localization of the individual sources of disturbances in real time. The proposed approach first performs the estimation of the modulation signal using a carrier signal estimator, which allows for a modulation signal with a frequency greater than the power frequency to be estimated. In the next step, the estimated modulating signal is decomposed into component signals associated with individual sources of voltage fluctuations using an enhanced empirical wavelet transform. In the last step, a statistical evaluation of the propagation of component signals with a comparable fundamental frequency is performed, which allows for the supply point of a particular disturbing load to be determined. The proposed approach is verified in numerical simulation studies using MATLAB/SIMULINK and in experimental studies carried out in a real low-voltage power grid. The research carried out shows that the proposed approach allows for the selective identification and localization of voltage fluctuation sources changing their state with a frequency of up to 150 Hz, unlike other methods currently used in practice.

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Section: Verification Of the Algorithm For Selective Identification And Localization Of Voltage Fluctuation Sourcesmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Selective Identification and Localization of Voltage Fluctuation Sources in Power Grids

Kuwałek¹

2021

Energies

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“…One of them is the identification of poor power quality degradation sources in power system. Four types of electromagnetic disturbances are most significant from the additional cost perspective: voltage distortion, unbalance, voltage dip and voltage fluctuation [1]. The paper concerns only one of themlocalization of harmonics.…”

Section: Introductionmentioning

confidence: 99%

Localization of Harmonic Sources in Power System - Simulation and Laboratory Study

Shawon¹,

Barczentewicz²,

Bień³

et al. 2024

RE&PQJ

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“…Methods of identification and localization voltage fluctuations sources are divided into single-point [11], [12] and multi-point [15], [16] methods in the literature. Single-point methods for identification and localization disturbing sources are the dominant part of the literature, due to the implementation simplicity.…”

Section: Introductionmentioning

confidence: 99%

Decomposition Problem in Process of Selective Identification and Localization of Voltage Fluctuations Sources in Power Grids

Kuwałek

2022

Preprint

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Voltage fluctuations are common disturbances in power grids, therefore the effective and selective process of identification and localization of individual voltage fluctuations sources is necessary for the minimization of such disturbances. Selectivity in the process of identification and localization disturbing loads is possible by the use cascade of blocks: demodulation, decomposition and propagation assessment. The effectiveness of this approach is closely related to the used method of decomposition. The paper presents the problem of decomposition process for the selected method of selective identification and localization of voltage fluctuation sources, in which the algorithm of enhanced empirical wavelet transform (EEWT) is used as the decomposition method. The paper presents selected research results from the real power grid, for which the result of selected approach causes mistakes in the process of identification and localization of voltage fluctuations sources. The potential causes of such mistakes related to the decomposition process are discussed on the basis of obtained research results.

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Single-Point Methods for Location of Distortion, Unbalance, Voltage Fluctuation and Dips Sources in a Power System

Cited by 14 publications

References 36 publications

Selective Identification and Localization of Voltage Fluctuation Sources in Power Grids

Selective Identification and Localization of Voltage Fluctuation Sources in Power Grids

Localization of Harmonic Sources in Power System - Simulation and Laboratory Study

Decomposition Problem in Process of Selective Identification and Localization of Voltage Fluctuations Sources in Power Grids

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