Flicker Dependency on Voltage Fluctuation at Frequencies Greater Than Power Frequency

Michalski, Mateusz; Wiczyński, Grzegorz

doi:10.1109/ichqp53011.2022.9808566

Cited by 5 publications

(4 citation statements)

References 24 publications

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“…The relationship described by (7) defines amplitude modulation (AM) without attenuated carrier wave and is a properly representation of voltage fluctuations that occur in the real stiff power grid [11], [13], [14], i.e., where the power frequency has negligible deviations (otherwise it is necessary to recreate voltage fluctuations as amplitude-phase/frequency modulation (AM-PM/FM) [23]). The carrier signal u c (t k ) in ( 7) describes the supply voltage before voltage fluctuations occur.…”

Section: A Test Signalmentioning

confidence: 99%

“…In laboratory experimental studies, a set of 4500 test signals was generated in accordance with the relationship defined by (7), with the following parameters:…”

Section: Laboratory Experimental Studiesmentioning

confidence: 99%

“…This phenomenon can cause flicker for different types of light sources (e.g. incandescent lamps, fluorescent lamps, LEDs) [7] and can disturb the operation and reduce the life of other loads (e.g. induction motors [8]).…”

Section: Introductionmentioning

confidence: 99%

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AM Modulation Signal Estimation Allowing Further Research on Sources of Voltage Fluctuations

Kuwałek

2020

IEEE Trans. Ind. Electron.

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Voltage fluctuations are common disturbances in power grids. Initially, it is necessary to selectively identify individual sources of voltage fluctuations to take actions to minimize the effects of voltage fluctuations. Selective identification of disturbing loads is possible by using a signal chain consisting of demodulation, decomposition, and assessment of the propagation of component signals. The accuracy of such an approach is closely related to the applied decomposition method. The paper presents a new method for decomposition by approximation with pulse waves. The proposed method allows for an correct identification of selected parameters, that is, the frequency of changes in the operating state of individual sources of voltage fluctuations and the amplitude of voltage changes caused by them. The article presents results from numerical simulation studies and laboratory experimental studies, based on which the estimation errors of the indicated parameters were determined by the proposed decomposition method and other empirical decomposition methods available in the literature. The real states that occur in power grids were recreated in the research. The metrological interpretation of the results obtained from the numerical simulation and experimental research is discussed.

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Section: A Test Signalmentioning

confidence: 99%

“…In laboratory experimental studies, a set of 4500 test signals was generated in accordance with the relationship defined by (7), with the following parameters:…”

Section: Laboratory Experimental Studiesmentioning

confidence: 99%

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AM Modulation Signal Estimation Allowing Further Research on Sources of Voltage Fluctuations

Kuwałek

2020

IEEE Trans. Ind. Electron.

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“…Subharmonics and, interconnected with them, voltage fluctuations cause various noxious phenomena in transformers, light sources, control systems, and power electronic and measurement equipment [4,7,16,24,27,29,30]. Especially sensitive to subharmonics is rotating machinery (based on [5,14,23,27,[31][32][33][34][35][36][37][38][39]).…”

Section: Introductionmentioning

confidence: 99%

Line-Start Permanent Magnet Synchronous Motor Supplied with Voltage Containing Negative-Sequence Subharmonics

Gnaciński,

Pepliński,

Muc

et al. 2023

Energies

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In some power systems, the voltage waveform contains frequency components less than fundamental, called subharmonics or subsynchronous interharmonics. Voltage subharmonics can be both positive- and negative-sequence, independent of their frequency (order). Subharmonics exert harmful effects on sundry electrical equipment, especially on rotating machinery; they cause various noxious phenomena, such as a local saturation of the magnetic circuit, increases in power losses and windings temperature, and torque pulsations leading to vibration of unacceptable severity. Notably, previous works reported excessive vibration of rotating machinery only under no-load, while under full load, rather moderate vibration occurred. This study deals with vibration analysis of a line-start permanent magnet synchronous motor (LSPMSM) supplied with the voltage containing negative-sentence subharmonics. Experimental investigations were conducted for a 3 kW, four-pole production LSPMSM for subharmonics of various values and frequencies. Voltage subharmonics of values significantly less than reported in real power systems were found to cause unacceptable vibration, especially under full load.

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Effect of Leakage Inductance Variation on Currents and Torque Pulsations of Induction Motor Under Subharmonics

Gnacńlski,

Hallmann

2024

2024 IEEE 18th International Conference on Compatibility, Power Electronics and Power Engineering (CPE-POWERENG)

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Flicker Dependency on Voltage Fluctuation at Frequencies Greater Than Power Frequency

Cited by 5 publications

References 24 publications

AM Modulation Signal Estimation Allowing Further Research on Sources of Voltage Fluctuations

AM Modulation Signal Estimation Allowing Further Research on Sources of Voltage Fluctuations

Line-Start Permanent Magnet Synchronous Motor Supplied with Voltage Containing Negative-Sequence Subharmonics

Effect of Leakage Inductance Variation on Currents and Torque Pulsations of Induction Motor Under Subharmonics

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